Add newline to influx line-protocol if not present

closes #2297

.gitattributes

@@ -0,0 +1,4 @@
+CHANGELOG.md merge=union
+README.md merge=union
+plugins/inputs/all/all.go merge=union
+plugins/outputs/all/all.go merge=union

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,44 @@
+## Directions
+
+GitHub Issues are reserved for actionable bug reports and feature requests.
+General questions should be sent to the [InfluxDB mailing list](https://groups.google.com/forum/#!forum/influxdb).
+
+Before opening an issue, search for similar bug reports or feature requests on GitHub Issues.
+If no similar issue can be found, fill out either the "Bug Report" or the "Feature Request" section below.
+Erase the other section and everything on and above this line.
+
+*Please note, the quickest way to fix a bug is to open a Pull Request.*
+
+## Bug report
+
+### Relevant telegraf.conf:
+
+### System info:
+
+[Include Telegraf version, operating system name, and other relevant details]
+
+### Steps to reproduce:
+
+1. ...
+2. ...
+
+### Expected behavior:
+
+### Actual behavior:
+
+### Additional info:
+
+[Include gist of relevant config, logs, etc.]
+
+
+## Feature Request
+
+Opening a feature request kicks off a discussion.
+
+### Proposal:
+
+### Current behavior:
+
+### Desired behavior:
+
+### Use case: [Why is this important (helps with prioritizing requests)]

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,5 @@
+### Required for all PRs:
+
+- [ ] CHANGELOG.md updated (we recommend not updating this until the PR has been approved by a maintainer)
+- [ ] Sign [CLA](https://influxdata.com/community/cla/) (if not already signed)
+- [ ] README.md updated (if adding a new plugin)

.gitignore

@@ -1,4 +1,7 @@
+build
 tivan
 .vagrant
-telegraf
+/telegraf
 .idea
+*~
+*#

CONFIGURATION.md

@@ -1,177 +0,0 @@
-# Telegraf Configuration
-
-## Plugin Configuration
-
-There are some configuration options that are configurable per plugin:
-
-* **name_override**: Override the base name of the measurement.
-(Default is the name of the plugin).
-* **name_prefix**: Specifies a prefix to attach to the measurement name.
-* **name_suffix**: Specifies a suffix to attach to the measurement name.
-* **tags**: A map of tags to apply to a specific plugin's measurements.
-
-### Plugin Filters
-
-There are also filters that can be configured per plugin:
-
-* **pass**: An array of strings that is used to filter metrics generated by the
-current plugin. Each string in the array is tested as a glob match against field names
-and if it matches, the field is emitted.
-* **drop**: The inverse of pass, if a field name matches, it is not emitted.
-* **tagpass**: tag names and arrays of strings that are used to filter
-measurements by the current plugin. Each string in the array is tested as a glob
-match against the tag name, and if it matches the measurement is emitted.
-* **tagdrop**: The inverse of tagpass. If a tag matches, the measurement is not emitted.
-This is tested on measurements that have passed the tagpass test.
-* **interval**: How often to gather this metric. Normal plugins use a single
-global interval, but if one particular plugin should be run less or more often,
-you can configure that here.
-
-### Plugin Configuration Examples
-
-This is a full working config that will output CPU data to an InfluxDB instance
-at 192.168.59.103:8086, tagging measurements with dc="denver-1". It will output
-measurements at a 10s interval and will collect per-cpu data, dropping any
-fields which begin with `time_`.
-
-```toml
-[tags]
-  dc = "denver-1"
-
-[agent]
-  interval = "10s"
-
-# OUTPUTS
-[outputs]
-[[outputs.influxdb]]
-  url = "http://192.168.59.103:8086" # required.
-  database = "telegraf" # required.
-  precision = "s"
-
-# PLUGINS
-[plugins]
-[[plugins.cpu]]
-  percpu = true
-  totalcpu = false
-  # filter all fields beginning with 'time_'
-  drop = ["time_*"]
-```
-
-### Plugin Config: tagpass and tagdrop
-
-```toml
-[plugins]
-[[plugins.cpu]]
-  percpu = true
-  totalcpu = false
-  drop = ["cpu_time"]
-  # Don't collect CPU data for cpu6 & cpu7
-  [plugins.cpu.tagdrop]
-    cpu = [ "cpu6", "cpu7" ]
-
-[[plugins.disk]]
-  [plugins.disk.tagpass]
-    # tagpass conditions are OR, not AND.
-    # If the (filesystem is ext4 or xfs) OR (the path is /opt or /home)
-    # then the metric passes
-    fstype = [ "ext4", "xfs" ]
-    # Globs can also be used on the tag values
-    path = [ "/opt", "/home*" ]
-```
-
-### Plugin Config: pass and drop
-
-```toml
-# Drop all metrics for guest & steal CPU usage
-[[plugins.cpu]]
-  percpu = false
-  totalcpu = true
-  drop = ["usage_guest", "usage_steal"]
-
-# Only store inode related metrics for disks
-[[plugins.disk]]
-  pass = ["inodes*"]
-```
-
-### Plugin config: prefix, suffix, and override
-
-This plugin will emit measurements with the name `cpu_total`
-
-```toml
-[[plugins.cpu]]
-  name_suffix = "_total"
-  percpu = false
-  totalcpu = true
-```
-
-This will emit measurements with the name `foobar`
-
-```toml
-[[plugins.cpu]]
-  name_override = "foobar"
-  percpu = false
-  totalcpu = true
-```
-
-### Plugin config: tags
-
-This plugin will emit measurements with two additional tags: `tag1=foo` and
-`tag2=bar`
-
-```toml
-[[plugins.cpu]]
-  percpu = false
-  totalcpu = true
-  [plugins.cpu.tags]
-    tag1 = "foo"
-    tag2 = "bar"
-```
-
-### Multiple plugins of the same type
-
-Additional plugins (or outputs) of the same type can be specified,
-just define more instances in the config file:
-
-```toml
-[[plugins.cpu]]
-  percpu = false
-  totalcpu = true
-
-[[plugins.cpu]]
-  percpu = true
-  totalcpu = false
-  drop = ["cpu_time*"]
-```
-
-## Output Configuration
-
-Telegraf also supports specifying multiple output sinks to send data to,
-configuring each output sink is different, but examples can be
-found by running `telegraf -sample-config`.
-
-Outputs also support the same configurable options as plugins
-(pass, drop, tagpass, tagdrop), added in 0.2.4
-
-```toml
-[[outputs.influxdb]]
-  urls = [ "http://localhost:8086" ]
-  database = "telegraf"
-  precision = "s"
-  # Drop all measurements that start with "aerospike"
-  drop = ["aerospike*"]
-
-[[outputs.influxdb]]
-  urls = [ "http://localhost:8086" ]
-  database = "telegraf-aerospike-data"
-  precision = "s"
-  # Only accept aerospike data:
-  pass = ["aerospike*"]
-
-[[outputs.influxdb]]
-  urls = [ "http://localhost:8086" ]
-  database = "telegraf-cpu0-data"
-  precision = "s"
-  # Only store measurements where the tag "cpu" matches the value "cpu0"
-  [outputs.influxdb.tagpass]
-    cpu = ["cpu0"]
-```

CONTRIBUTING.md

@@ -1,103 +1,74 @@
+## Steps for Contributing:
+
+1. [Sign the CLA](http://influxdb.com/community/cla.html)
+1. Make changes or write plugin (see below for details)
+1. Add your plugin to one of: `plugins/{inputs,outputs,aggregators,processors}/all/all.go`
+1. If your plugin requires a new Go package,
+[add it](https://github.com/influxdata/telegraf/blob/master/CONTRIBUTING.md#adding-a-dependency)
+1. Write a README for your plugin, if it's an input plugin, it should be structured
+like the [input example here](https://github.com/influxdata/telegraf/blob/master/plugins/inputs/EXAMPLE_README.md).
+Output plugins READMEs are less structured,
+but any information you can provide on how the data will look is appreciated.
+See the [OpenTSDB output](https://github.com/influxdata/telegraf/tree/master/plugins/outputs/opentsdb)
+for a good example.
+1. **Optional:** Help users of your plugin by including example queries for populating dashboards. Include these sample queries in the `README.md` for the plugin.
+1. **Optional:** Write a [tickscript](https://docs.influxdata.com/kapacitor/v1.0/tick/syntax/) for your plugin and add it to [Kapacitor](https://github.com/influxdata/kapacitor/tree/master/examples/telegraf). Or mention @jackzampolin in a PR comment with some common queries that you would want to alert on and he will write one for you.
+
+## GoDoc
+
+Public interfaces for inputs, outputs, processors, aggregators, metrics,
+and the accumulator can be found on the GoDoc
+
+[![GoDoc](https://godoc.org/github.com/influxdata/telegraf?status.svg)](https://godoc.org/github.com/influxdata/telegraf)
+
 ## Sign the CLA
 
 Before we can merge a pull request, you will need to sign the CLA,
 which can be found [on our website](http://influxdb.com/community/cla.html)
 
-## Plugins
+## Adding a dependency
 
-This section is for developers who want to create new collection plugins.
+Assuming you can already build the project, run these in the telegraf directory:
+
+1. `go get github.com/sparrc/gdm`
+1. `gdm restore`
+1. `GOOS=linux gdm save`
+
+## Input Plugins
+
+This section is for developers who want to create new collection inputs.
 Telegraf is entirely plugin driven. This interface allows for operators to
-pick and chose what is gathered as well as makes it easy for developers
+pick and chose what is gathered and makes it easy for developers
 to create new ways of generating metrics.
 
 Plugin authorship is kept as simple as possible to promote people to develop
-and submit new plugins.
+and submit new inputs.
 
-### Plugin Guidelines
+### Input Plugin Guidelines
 
-* A plugin must conform to the `plugins.Plugin` interface.
-* Each generated metric automatically has the name of the plugin that generated
-it prepended. This is to keep plugins honest.
-* Plugins should call `plugins.Add` in their `init` function to register themselves.
+* A plugin must conform to the [`telegraf.Input`](https://godoc.org/github.com/influxdata/telegraf#Input) interface.
+* Input Plugins should call `inputs.Add` in their `init` function to register themselves.
 See below for a quick example.
-* To be available within Telegraf itself, plugins must add themselves to the
-`github.com/influxdb/telegraf/plugins/all/all.go` file.
+* Input Plugins must be added to the
+`github.com/influxdata/telegraf/plugins/inputs/all/all.go` file.
 * The `SampleConfig` function should return valid toml that describes how the
 plugin can be configured. This is include in `telegraf -sample-config`.
 * The `Description` function should say in one line what this plugin does.
 
-### Plugin interface
+Let's say you've written a plugin that emits metrics about processes on the
+current host.
 
-```go
-type Plugin interface {
-    SampleConfig() string
-    Description() string
-    Gather(Accumulator) error
-}
-
-type Accumulator interface {
-    Add(measurement string,
-        value interface{},
-        tags map[string]string,
-        timestamp ...time.Time)
-    AddFields(measurement string,
-        fields map[string]interface{},
-        tags map[string]string,
-        timestamp ...time.Time)
-}
-```
-
-### Accumulator
-
-The way that a plugin emits metrics is by interacting with the Accumulator.
-
-The `Add` function takes 3 arguments:
-* **measurement**: A string description of the metric. For instance `bytes_read` or `faults`.
-* **value**: A value for the metric. This accepts 5 different types of value:
-  * **int**: The most common type. All int types are accepted but favor using `int64`
-  Useful for counters, etc.
-  * **float**: Favor `float64`, useful for gauges, percentages, etc.
-  * **bool**: `true` or `false`, useful to indicate the presence of a state. `light_on`, etc.
-  * **string**: Typically used to indicate a message, or some kind of freeform information.
-  * **time.Time**: Useful for indicating when a state last occurred, for instance `light_on_since`.
-* **tags**: This is a map of strings to strings to describe the where or who
-about the metric. For instance, the `net` plugin adds a tag named `"interface"`
-set to the name of the network interface, like `"eth0"`.
-
-The `AddFieldsWithTime` allows multiple values for a point to be passed. The values
-used are the same type profile as **value** above. The **timestamp** argument
-allows a point to be registered as having occurred at an arbitrary time.
-
-Let's say you've written a plugin that emits metrics about processes on the current host.
-
-```go
-
-type Process struct {
-    CPUTime float64
-    MemoryBytes int64
-    PID int
-}
-
-func Gather(acc plugins.Accumulator) error {
-    for _, process := range system.Processes() {
-        tags := map[string]string {
-            "pid": fmt.Sprintf("%d", process.Pid),
-        }
-
-        acc.Add("cpu", process.CPUTime, tags, time.Now())
-        acc.Add("memory", process.MemoryBytes, tags, time.Now())
-    }
-}
-```
-
-### Plugin Example
+### Input Plugin Example
 
 ```go
 package simple
 
 // simple.go
 
-import "github.com/influxdb/telegraf/plugins"
+import (
+    "github.com/influxdata/telegraf"
+    "github.com/influxdata/telegraf/plugins/inputs"
+)
 
 type Simple struct {
     Ok bool
@@ -111,30 +82,83 @@ func (s *Simple) SampleConfig() string {
     return "ok = true # indicate if everything is fine"
 }
 
-func (s *Simple) Gather(acc plugins.Accumulator) error {
+func (s *Simple) Gather(acc telegraf.Accumulator) error {
     if s.Ok {
-        acc.Add("state", "pretty good", nil)
+        acc.AddFields("state", map[string]interface{}{"value": "pretty good"}, nil)
     } else {
-        acc.Add("state", "not great", nil)
+        acc.AddFields("state", map[string]interface{}{"value": "not great"}, nil)
     }
 
     return nil
 }
 
 func init() {
-    plugins.Add("simple", func() plugins.Plugin { return &Simple{} })
+    inputs.Add("simple", func() telegraf.Input { return &Simple{} })
 }
 ```
 
-## Service Plugins
+## Adding Typed Metrics
+
+In addition the the `AddFields` function, the accumulator also supports an
+`AddGauge` and `AddCounter` function. These functions are for adding _typed_
+metrics. Metric types are ignored for the InfluxDB output, but can be used
+for other outputs, such as [prometheus](https://prometheus.io/docs/concepts/metric_types/).
+
+## Input Plugins Accepting Arbitrary Data Formats
+
+Some input plugins (such as
+[exec](https://github.com/influxdata/telegraf/tree/master/plugins/inputs/exec))
+accept arbitrary input data formats. An overview of these data formats can
+be found
+[here](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md).
+
+In order to enable this, you must specify a `SetParser(parser parsers.Parser)`
+function on the plugin object (see the exec plugin for an example), as well as
+defining `parser` as a field of the object.
+
+You can then utilize the parser internally in your plugin, parsing data as you
+see fit. Telegraf's configuration layer will take care of instantiating and
+creating the `Parser` object.
+
+You should also add the following to your SampleConfig() return:
+
+```toml
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "influx"
+```
+
+Below is the `Parser` interface.
+
+```go
+// Parser is an interface defining functions that a parser plugin must satisfy.
+type Parser interface {
+    // Parse takes a byte buffer separated by newlines
+    // ie, `cpu.usage.idle 90\ncpu.usage.busy 10`
+    // and parses it into telegraf metrics
+    Parse(buf []byte) ([]telegraf.Metric, error)
+
+    // ParseLine takes a single string metric
+    // ie, "cpu.usage.idle 90"
+    // and parses it into a telegraf metric.
+    ParseLine(line string) (telegraf.Metric, error)
+}
+```
+
+And you can view the code
+[here.](https://github.com/influxdata/telegraf/blob/henrypfhu-master/plugins/parsers/registry.go)
+
+## Service Input Plugins
 
 This section is for developers who want to create new "service" collection
-plugins. A service plugin differs from a regular plugin in that it operates
+inputs. A service plugin differs from a regular plugin in that it operates
 a background service while Telegraf is running. One example would be the `statsd`
 plugin, which operates a statsd server.
 
-Service Plugins are substantially more complicated than a regular plugin, as they
-will require threads and locks to verify data integrity. Service Plugins should
+Service Input Plugins are substantially more complicated than a regular plugin, as they
+will require threads and locks to verify data integrity. Service Input Plugins should
 be avoided unless there is no way to create their behavior with a regular plugin.
 
 Their interface is quite similar to a regular plugin, with the addition of `Start()`
@@ -143,49 +167,25 @@ and `Stop()` methods.
 ### Service Plugin Guidelines
 
 * Same as the `Plugin` guidelines, except that they must conform to the
-`plugins.ServicePlugin` interface.
+`inputs.ServiceInput` interface.
 
-### Service Plugin interface
-
-```go
-type ServicePlugin interface {
-    SampleConfig() string
-    Description() string
-    Gather(Accumulator) error
-    Start() error
-    Stop()
-}
-```
-
-## Outputs
+## Output Plugins
 
 This section is for developers who want to create a new output sink. Outputs
 are created in a similar manner as collection plugins, and their interface has
 similar constructs.
 
-### Output Guidelines
+### Output Plugin Guidelines
 
-* An output must conform to the `outputs.Output` interface.
+* An output must conform to the [`telegraf.Output`](https://godoc.org/github.com/influxdata/telegraf#Output) interface.
 * Outputs should call `outputs.Add` in their `init` function to register themselves.
 See below for a quick example.
 * To be available within Telegraf itself, plugins must add themselves to the
-`github.com/influxdb/telegraf/outputs/all/all.go` file.
+`github.com/influxdata/telegraf/plugins/outputs/all/all.go` file.
 * The `SampleConfig` function should return valid toml that describes how the
 output can be configured. This is include in `telegraf -sample-config`.
 * The `Description` function should say in one line what this output does.
 
-### Output interface
-
-```go
-type Output interface {
-    Connect() error
-    Close() error
-    Description() string
-    SampleConfig() string
-    Write(points []*client.Point) error
-}
-```
-
 ### Output Example
 
 ```go
@@ -193,7 +193,10 @@ package simpleoutput
 
 // simpleoutput.go
 
-import "github.com/influxdb/telegraf/outputs"
+import (
+    "github.com/influxdata/telegraf"
+    "github.com/influxdata/telegraf/plugins/outputs"
+)
 
 type Simple struct {
     Ok bool
@@ -217,20 +220,47 @@ func (s *Simple) Close() error {
     return nil
 }
 
-func (s *Simple) Write(points []*client.Point) error {
-    for _, pt := range points {
-        // write `pt` to the output sink here
+func (s *Simple) Write(metrics []telegraf.Metric) error {
+    for _, metric := range metrics {
+        // write `metric` to the output sink here
     }
     return nil
 }
 
 func init() {
-    outputs.Add("simpleoutput", func() outputs.Output { return &Simple{} })
+    outputs.Add("simpleoutput", func() telegraf.Output { return &Simple{} })
 }
 
 ```
 
-## Service Outputs
+## Output Plugins Writing Arbitrary Data Formats
+
+Some output plugins (such as
+[file](https://github.com/influxdata/telegraf/tree/master/plugins/outputs/file))
+can write arbitrary output data formats. An overview of these data formats can
+be found
+[here](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md).
+
+In order to enable this, you must specify a
+`SetSerializer(serializer serializers.Serializer)`
+function on the plugin object (see the file plugin for an example), as well as
+defining `serializer` as a field of the object.
+
+You can then utilize the serializer internally in your plugin, serializing data
+before it's written. Telegraf's configuration layer will take care of
+instantiating and creating the `Serializer` object.
+
+You should also add the following to your SampleConfig() return:
+
+```toml
+  ## Data format to output.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+  data_format = "influx"
+```
+
+## Service Output Plugins
 
 This section is for developers who want to create new "service" output. A
 service output differs from a regular output in that it operates a background service
@@ -243,19 +273,185 @@ and `Stop()` methods.
 ### Service Output Guidelines
 
 * Same as the `Output` guidelines, except that they must conform to the
-`plugins.ServiceOutput` interface.
+`output.ServiceOutput` interface.
 
-### Service Output interface
+## Processor Plugins
+
+This section is for developers who want to create a new processor plugin.
+
+### Processor Plugin Guidelines
+
+* A processor must conform to the [`telegraf.Processor`](https://godoc.org/github.com/influxdata/telegraf#Processor) interface.
+* Processors should call `processors.Add` in their `init` function to register themselves.
+See below for a quick example.
+* To be available within Telegraf itself, plugins must add themselves to the
+`github.com/influxdata/telegraf/plugins/processors/all/all.go` file.
+* The `SampleConfig` function should return valid toml that describes how the
+processor can be configured. This is include in `telegraf -sample-config`.
+* The `Description` function should say in one line what this processor does.
+
+### Processor Example
 
 ```go
-type ServiceOutput interface {
-    Connect() error
-    Close() error
-    Description() string
-    SampleConfig() string
-    Write(points []*client.Point) error
-    Start() error
-    Stop()
+package printer
+
+// printer.go
+
+import (
+	"fmt"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/processors"
+)
+
+type Printer struct {
+}
+
+var sampleConfig = `
+`
+
+func (p *Printer) SampleConfig() string {
+	return sampleConfig
+}
+
+func (p *Printer) Description() string {
+	return "Print all metrics that pass through this filter."
+}
+
+func (p *Printer) Apply(in ...telegraf.Metric) []telegraf.Metric {
+	for _, metric := range in {
+		fmt.Println(metric.String())
+	}
+	return in
+}
+
+func init() {
+	processors.Add("printer", func() telegraf.Processor {
+		return &Printer{}
+	})
+}
+```
+
+## Aggregator Plugins
+
+This section is for developers who want to create a new aggregator plugin.
+
+### Aggregator Plugin Guidelines
+
+* A aggregator must conform to the [`telegraf.Aggregator`](https://godoc.org/github.com/influxdata/telegraf#Aggregator) interface.
+* Aggregators should call `aggregators.Add` in their `init` function to register themselves.
+See below for a quick example.
+* To be available within Telegraf itself, plugins must add themselves to the
+`github.com/influxdata/telegraf/plugins/aggregators/all/all.go` file.
+* The `SampleConfig` function should return valid toml that describes how the
+aggregator can be configured. This is include in `telegraf -sample-config`.
+* The `Description` function should say in one line what this aggregator does.
+* The Aggregator plugin will need to keep caches of metrics that have passed
+through it. This should be done using the builtin `HashID()` function of each
+metric.
+* When the `Reset()` function is called, all caches should be cleared.
+
+### Aggregator Example
+
+```go
+package min
+
+// min.go
+
+import (
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/aggregators"
+)
+
+type Min struct {
+	// caches for metric fields, names, and tags
+	fieldCache map[uint64]map[string]float64
+	nameCache  map[uint64]string
+	tagCache   map[uint64]map[string]string
+}
+
+func NewMin() telegraf.Aggregator {
+	m := &Min{}
+	m.Reset()
+	return m
+}
+
+var sampleConfig = `
+  ## period is the flush & clear interval of the aggregator.
+  period = "30s"
+  ## If true drop_original will drop the original metrics and
+  ## only send aggregates.
+  drop_original = false
+`
+
+func (m *Min) SampleConfig() string {
+	return sampleConfig
+}
+
+func (m *Min) Description() string {
+	return "Keep the aggregate min of each metric passing through."
+}
+
+func (m *Min) Add(in telegraf.Metric) {
+	id := in.HashID()
+	if _, ok := m.nameCache[id]; !ok {
+		// hit an uncached metric, create caches for first time:
+		m.nameCache[id] = in.Name()
+		m.tagCache[id] = in.Tags()
+		m.fieldCache[id] = make(map[string]float64)
+		for k, v := range in.Fields() {
+			if fv, ok := convert(v); ok {
+				m.fieldCache[id][k] = fv
+			}
+		}
+	} else {
+		for k, v := range in.Fields() {
+			if fv, ok := convert(v); ok {
+				if _, ok := m.fieldCache[id][k]; !ok {
+					// hit an uncached field of a cached metric
+					m.fieldCache[id][k] = fv
+					continue
+				}
+				if fv < m.fieldCache[id][k] {
+                    // set new minimum
+					m.fieldCache[id][k] = fv
+				}
+			}
+		}
+	}
+}
+
+func (m *Min) Push(acc telegraf.Accumulator) {
+	for id, _ := range m.nameCache {
+		fields := map[string]interface{}{}
+		for k, v := range m.fieldCache[id] {
+			fields[k+"_min"] = v
+		}
+		acc.AddFields(m.nameCache[id], fields, m.tagCache[id])
+	}
+}
+
+func (m *Min) Reset() {
+	m.fieldCache = make(map[uint64]map[string]float64)
+	m.nameCache = make(map[uint64]string)
+	m.tagCache = make(map[uint64]map[string]string)
+}
+
+func convert(in interface{}) (float64, bool) {
+	switch v := in.(type) {
+	case float64:
+		return v, true
+	case int64:
+		return float64(v), true
+	default:
+		return 0, false
+	}
+}
+
+func init() {
+	aggregators.Add("min", func() telegraf.Aggregator {
+		return NewMin()
+	})
 }
 ```
 
@@ -274,7 +470,7 @@ which would take some time to replicate.
 To overcome this situation we've decided to use docker containers to provide a
 fast and reproducible environment to test those services which require it.
 For other situations
-(i.e: https://github.com/influxdb/telegraf/blob/master/plugins/redis/redis_test.go )
+(i.e: https://github.com/influxdata/telegraf/blob/master/plugins/inputs/redis/redis_test.go)
 a simple mock will suffice.
 
 To execute Telegraf tests follow these simple steps:
@@ -283,10 +479,6 @@ To execute Telegraf tests follow these simple steps:
 instructions
 - execute `make test`
 
-**OSX users**: you will need to install `boot2docker` or `docker-machine`.
-The Makefile will assume that you have a `docker-machine` box called `default` to
-get the IP address.
-
 ### Unit test troubleshooting
 
 Try cleaning up your test environment by executing `make docker-kill` and

Godeps

@@ -1,52 +1,65 @@
-git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git dbd8d5c40a582eb9adacde36b47932b3a3ad0034
-github.com/Shopify/sarama 159e9990b0796511607dd0d7aaa3eb37d1829d16
-github.com/Sirupsen/logrus 446d1c146faa8ed3f4218f056fcd165f6bcfda81
-github.com/amir/raidman 6a8e089bbe32e6b907feae5ba688841974b3c339
-github.com/armon/go-metrics 06b60999766278efd6d2b5d8418a58c3d5b99e87
-github.com/aws/aws-sdk-go 999b1591218c36d5050d1ba7266eba956e65965f
-github.com/beorn7/perks b965b613227fddccbfffe13eae360ed3fa822f8d
-github.com/boltdb/bolt b34b35ea8d06bb9ae69d9a349119252e4c1d8ee0
+github.com/Shopify/sarama 8aadb476e66ca998f2f6bb3c993e9a2daa3666b9
+github.com/Sirupsen/logrus 219c8cb75c258c552e999735be6df753ffc7afdc
+github.com/aerospike/aerospike-client-go 7f3a312c3b2a60ac083ec6da296091c52c795c63
+github.com/amir/raidman 53c1b967405155bfc8758557863bf2e14f814687
+github.com/aws/aws-sdk-go 13a12060f716145019378a10e2806c174356b857
+github.com/beorn7/perks 3ac7bf7a47d159a033b107610db8a1b6575507a4
 github.com/cenkalti/backoff 4dc77674aceaabba2c7e3da25d4c823edfb73f99
-github.com/dancannon/gorethink a124c9663325ed9f7fb669d17c69961b59151e6e
+github.com/couchbase/go-couchbase cb664315a324d87d19c879d9cc67fda6be8c2ac1
+github.com/couchbase/gomemcached a5ea6356f648fec6ab89add00edd09151455b4b2
+github.com/couchbase/goutils 5823a0cbaaa9008406021dc5daf80125ea30bba6
+github.com/dancannon/gorethink e7cac92ea2bc52638791a021f212145acfedb1fc
 github.com/davecgh/go-spew 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
-github.com/eapache/go-resiliency f341fb4dca45128e4aa86389fa6a675d55fe25e1
+github.com/docker/engine-api 8924d6900370b4c7e7984be5adc61f50a80d7537
+github.com/docker/go-connections f549a9393d05688dff0992ef3efd8bbe6c628aeb
+github.com/docker/go-units 5d2041e26a699eaca682e2ea41c8f891e1060444
+github.com/eapache/go-resiliency b86b1ec0dd4209a588dc1285cdd471e73525c0b3
 github.com/eapache/queue ded5959c0d4e360646dc9e9908cff48666781367
-github.com/fsouza/go-dockerclient 7177a9e3543b0891a5d91dbf7051e0f71455c8ef
-github.com/go-ini/ini 9314fb0ef64171d6a3d0a4fa570dfa33441cba05
-github.com/go-sql-driver/mysql d512f204a577a4ab037a1816604c48c9c13210be
-github.com/gogo/protobuf e492fd34b12d0230755c45aa5fb1e1eea6a84aa9
-github.com/golang/protobuf 68415e7123da32b07eab49c96d2c4d6158360e9b
-github.com/golang/snappy 723cc1e459b8eea2dea4583200fd60757d40097a
-github.com/gonuts/go-shellquote e842a11b24c6abfb3dd27af69a17f482e4b483c2
-github.com/hailocab/go-hostpool 0637eae892be221164aff5fcbccc57171aea6406
-github.com/hashicorp/go-msgpack fa3f63826f7c23912c15263591e65d54d080b458
-github.com/hashicorp/raft d136cd15dfb7876fd7c89cad1995bc4f19ceb294
-github.com/hashicorp/raft-boltdb d1e82c1ec3f15ee991f7cc7ffd5b67ff6f5bbaee
-github.com/influxdb/influxdb 69a7664f2d4b75aec300b7cbfc7e57c971721f04
-github.com/jmespath/go-jmespath c01cf91b011868172fdcd9f41838e80c9d716264
-github.com/klauspost/crc32 0aff1ea9c20474c3901672b5b6ead0ac611156de
-github.com/lib/pq 11fc39a580a008f1f39bb3d11d984fb34ed778d9
+github.com/eclipse/paho.mqtt.golang 0f7a459f04f13a41b7ed752d47944528d4bf9a86
+github.com/go-sql-driver/mysql 1fca743146605a172a266e1654e01e5cd5669bee
+github.com/gobwas/glob 49571a1557cd20e6a2410adc6421f85b66c730b5
+github.com/golang/protobuf 552c7b9542c194800fd493123b3798ef0a832032
+github.com/golang/snappy d9eb7a3d35ec988b8585d4a0068e462c27d28380
+github.com/gorilla/context 1ea25387ff6f684839d82767c1733ff4d4d15d0a
+github.com/gorilla/mux c9e326e2bdec29039a3761c07bece13133863e1e
+github.com/hailocab/go-hostpool e80d13ce29ede4452c43dea11e79b9bc8a15b478
+github.com/hashicorp/consul 5aa90455ce78d4d41578bafc86305e6e6b28d7d2
+github.com/hpcloud/tail b2940955ab8b26e19d43a43c4da0475dd81bdb56
+github.com/influxdata/config b79f6829346b8d6e78ba73544b1e1038f1f1c9da
+github.com/influxdata/influxdb fc57c0f7c635df3873f3d64f0ed2100ddc94d5ae
+github.com/influxdata/toml af4df43894b16e3fd2b788d01bd27ad0776ef2d0
+github.com/influxdata/wlog 7c63b0a71ef8300adc255344d275e10e5c3a71ec
+github.com/kardianos/osext 29ae4ffbc9a6fe9fb2bc5029050ce6996ea1d3bc
+github.com/kardianos/service 5e335590050d6d00f3aa270217d288dda1c94d0a
+github.com/kballard/go-shellquote d8ec1a69a250a17bb0e419c386eac1f3711dc142
+github.com/klauspost/crc32 19b0b332c9e4516a6370a0456e6182c3b5036720
+github.com/lib/pq e182dc4027e2ded4b19396d638610f2653295f36
 github.com/matttproud/golang_protobuf_extensions d0c3fe89de86839aecf2e0579c40ba3bb336a453
+github.com/miekg/dns cce6c130cdb92c752850880fd285bea1d64439dd
 github.com/mreiferson/go-snappystream 028eae7ab5c4c9e2d1cb4c4ca1e53259bbe7e504
 github.com/naoina/go-stringutil 6b638e95a32d0c1131db0e7fe83775cbea4a0d0b
-github.com/naoina/toml 751171607256bb66e64c9f0220c00662420c38e9
-github.com/nsqio/go-nsq 2118015c120962edc5d03325c680daf3163a8b5f
-github.com/pborman/uuid cccd189d45f7ac3368a0d127efb7f4d08ae0b655
-github.com/pmezard/go-difflib e8554b8641db39598be7f6342874b958f12ae1d4
-github.com/prometheus/client_golang 67994f177195311c3ea3d4407ed0175e34a4256f
+github.com/nats-io/nats ea8b4fd12ebb823073c0004b9f09ac8748f4f165
+github.com/nats-io/nuid a5152d67cf63cbfb5d992a395458722a45194715
+github.com/nsqio/go-nsq 0b80d6f05e15ca1930e0c5e1d540ed627e299980
+github.com/opencontainers/runc 89ab7f2ccc1e45ddf6485eaa802c35dcf321dfc8
+github.com/prometheus/client_golang 18acf9993a863f4c4b40612e19cdd243e7c86831
 github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6
-github.com/prometheus/common 56b90312e937d43b930f06a59bf0d6a4ae1944bc
+github.com/prometheus/common e8eabff8812b05acf522b45fdcd725a785188e37
 github.com/prometheus/procfs 406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8
 github.com/samuel/go-zookeeper 218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f
-github.com/shirou/gopsutil fc932d9090f13a84fb4b3cb8baa124610cab184c
+github.com/shirou/gopsutil 1516eb9ddc5e61ba58874047a98f8b44b5e585e8
+github.com/soniah/gosnmp 3fe3beb30fa9700988893c56a63b1df8e1b68c26
 github.com/streadway/amqp b4f3ceab0337f013208d31348b578d83c0064744
-github.com/stretchr/objx 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
-github.com/stretchr/testify e3a8ff8ce36581f87a15341206f205b1da467059
-github.com/wvanbergen/kafka 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
+github.com/stretchr/testify 1f4a1643a57e798696635ea4c126e9127adb7d3c
+github.com/vjeantet/grok 83bfdfdfd1a8146795b28e547a8e3c8b28a466c2
+github.com/wvanbergen/kafka bc265fedb9ff5b5c5d3c0fdcef4a819b3523d3ee
 github.com/wvanbergen/kazoo-go 0f768712ae6f76454f987c3356177e138df258f8
-golang.org/x/crypto 7b85b097bf7527677d54d3220065e966a0e3b613
-golang.org/x/net 1796f9b8b7178e3c7587dff118d3bb9d37f9b0b3
-gopkg.in/dancannon/gorethink.v1 a124c9663325ed9f7fb669d17c69961b59151e6e
+github.com/yuin/gopher-lua bf3808abd44b1e55143a2d7f08571aaa80db1808
+github.com/zensqlmonitor/go-mssqldb ffe5510c6fa5e15e6d983210ab501c815b56b363
+golang.org/x/crypto c197bcf24cde29d3f73c7b4ac6fd41f4384e8af6
+golang.org/x/net 6acef71eb69611914f7a30939ea9f6e194c78172
+golang.org/x/text a71fd10341b064c10f4a81ceac72bcf70f26ea34
+gopkg.in/dancannon/gorethink.v1 7d1af5be49cb5ecc7b177bf387d232050299d6ef
 gopkg.in/fatih/pool.v2 cba550ebf9bce999a02e963296d4bc7a486cb715
-gopkg.in/mgo.v2 e30de8ac9ae3b30df7065f766c71f88bba7d4e49
-gopkg.in/yaml.v2 f7716cbe52baa25d2e9b0d0da546fcf909fc16b4
+gopkg.in/mgo.v2 d90005c5262a3463800497ea5a89aed5fe22c886
+gopkg.in/yaml.v2 a83829b6f1293c91addabc89d0571c246397bbf4

Godeps_windows

@@ -0,0 +1,11 @@
+github.com/Microsoft/go-winio ce2922f643c8fd76b46cadc7f404a06282678b34
+github.com/StackExchange/wmi f3e2bae1e0cb5aef83e319133eabfee30013a4a5
+github.com/go-ole/go-ole be49f7c07711fcb603cff39e1de7c67926dc0ba7
+github.com/shirou/w32 3c9377fc6748f222729a8270fe2775d149a249ad
+golang.org/x/sys a646d33e2ee3172a661fc09bca23bb4889a41bc8
+github.com/go-ini/ini 9144852efba7c4daf409943ee90767da62d55438
+github.com/jmespath/go-jmespath bd40a432e4c76585ef6b72d3fd96fb9b6dc7b68d
+github.com/pmezard/go-difflib/difflib 792786c7400a136282c1664665ae0a8db921c6c2
+github.com/stretchr/objx 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
+gopkg.in/fsnotify.v1 a8a77c9133d2d6fd8334f3260d06f60e8d80a5fb
+gopkg.in/tomb.v1 dd632973f1e7218eb1089048e0798ec9ae7dceb8

Makefile

@@ -1,5 +1,6 @@
-UNAME := $(shell sh -c 'uname')
 VERSION := $(shell sh -c 'git describe --always --tags')
+BRANCH := $(shell sh -c 'git rev-parse --abbrev-ref HEAD')
+COMMIT := $(shell sh -c 'git rev-parse --short HEAD')
 ifdef GOBIN
 PATH := $(GOBIN):$(PATH)
 else
@@ -9,90 +10,87 @@ endif
 # Standard Telegraf build
 default: prepare build
 
+# Windows build
+windows: prepare-windows build-windows
+
 # Only run the build (no dependency grabbing)
 build:
-	go build -o telegraf -ldflags \
-		"-X main.Version=$(VERSION)" \
+	go install -ldflags \
+		"-X main.version=$(VERSION) -X main.commit=$(COMMIT) -X main.branch=$(BRANCH)" ./...
+
+build-windows:
+	GOOS=windows GOARCH=amd64 go build -o telegraf.exe -ldflags \
+		"-X main.version=$(VERSION) -X main.commit=$(COMMIT) -X main.branch=$(BRANCH)" \
 		./cmd/telegraf/telegraf.go
 
-# Build with race detector
-dev: prepare
-	go build -race -o telegraf -ldflags \
-		"-X main.Version=$(VERSION)" \
+build-for-docker:
+	CGO_ENABLED=0 GOOS=linux go build -installsuffix cgo -o telegraf -ldflags \
+		"-s -X main.version=$(VERSION) -X main.commit=$(COMMIT) -X main.branch=$(BRANCH)" \
 		./cmd/telegraf/telegraf.go
 
-# Build linux 64-bit, 32-bit and arm architectures
-build-linux-bins: prepare
-	GOARCH=amd64 GOOS=linux go build -o telegraf_linux_amd64 \
-								-ldflags "-X main.Version=$(VERSION)" \
-								./cmd/telegraf/telegraf.go
-	GOARCH=386 GOOS=linux go build -o telegraf_linux_386 \
-								-ldflags "-X main.Version=$(VERSION)" \
-								./cmd/telegraf/telegraf.go
-	GOARCH=arm GOOS=linux go build -o telegraf_linux_arm \
-								-ldflags "-X main.Version=$(VERSION)" \
-								./cmd/telegraf/telegraf.go
+# run package script
+package:
+	./scripts/build.py --package --version="$(VERSION)" --platform=linux --arch=all --upload
 
 # Get dependencies and use gdm to checkout changesets
 prepare:
-	go get ./...
 	go get github.com/sparrc/gdm
 	gdm restore
 
+# Use the windows godeps file to prepare dependencies
+prepare-windows:
+	go get github.com/sparrc/gdm
+	gdm restore
+	gdm restore -f Godeps_windows
+
 # Run all docker containers necessary for unit tests
 docker-run:
-ifeq ($(UNAME), Darwin)
-	docker run --name kafka \
-		-e ADVERTISED_HOST=$(shell sh -c 'boot2docker ip || docker-machine ip default') \
-		-e ADVERTISED_PORT=9092 \
-		-p "2181:2181" -p "9092:9092" \
-		-d spotify/kafka
-endif
-ifeq ($(UNAME), Linux)
+	docker run --name aerospike -p "3000:3000" -d aerospike/aerospike-server:3.9.0
 	docker run --name kafka \
 		-e ADVERTISED_HOST=localhost \
 		-e ADVERTISED_PORT=9092 \
 		-p "2181:2181" -p "9092:9092" \
 		-d spotify/kafka
-endif
 	docker run --name mysql -p "3306:3306" -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -d mysql
 	docker run --name memcached -p "11211:11211" -d memcached
 	docker run --name postgres -p "5432:5432" -d postgres
 	docker run --name rabbitmq -p "15672:15672" -p "5672:5672" -d rabbitmq:3-management
-	docker run --name opentsdb -p "4242:4242" -d petergrace/opentsdb-docker
 	docker run --name redis -p "6379:6379" -d redis
-	docker run --name aerospike -p "3000:3000" -d aerospike
 	docker run --name nsq -p "4150:4150" -d nsqio/nsq /nsqd
 	docker run --name mqtt -p "1883:1883" -d ncarlier/mqtt
 	docker run --name riemann -p "5555:5555" -d blalor/riemann
+	docker run --name nats -p "4222:4222" -d nats
 
 # Run docker containers necessary for CircleCI unit tests
 docker-run-circle:
+	docker run --name aerospike -p "3000:3000" -d aerospike/aerospike-server:3.9.0
 	docker run --name kafka \
 		-e ADVERTISED_HOST=localhost \
 		-e ADVERTISED_PORT=9092 \
 		-p "2181:2181" -p "9092:9092" \
 		-d spotify/kafka
-	docker run --name opentsdb -p "4242:4242" -d petergrace/opentsdb-docker
-	docker run --name aerospike -p "3000:3000" -d aerospike
 	docker run --name nsq -p "4150:4150" -d nsqio/nsq /nsqd
 	docker run --name mqtt -p "1883:1883" -d ncarlier/mqtt
 	docker run --name riemann -p "5555:5555" -d blalor/riemann
+	docker run --name nats -p "4222:4222" -d nats
 
 # Kill all docker containers, ignore errors
 docker-kill:
-	-docker kill nsq aerospike redis opentsdb rabbitmq postgres memcached mysql kafka mqtt riemann
-	-docker rm nsq aerospike redis opentsdb rabbitmq postgres memcached mysql kafka mqtt riemann
+	-docker kill nsq aerospike redis rabbitmq postgres memcached mysql kafka mqtt riemann nats
+	-docker rm nsq aerospike redis rabbitmq postgres memcached mysql kafka mqtt riemann nats
 
 # Run full unit tests using docker containers (includes setup and teardown)
-test: docker-kill docker-run
+test: vet docker-kill docker-run
 	# Sleeping for kafka leadership election, TSDB setup, etc.
 	sleep 60
 	# SUCCESS, running tests
 	go test -race ./...
 
 # Run "short" unit tests
-test-short:
+test-short: vet
 	go test -short ./...
 
-.PHONY: test
+vet:
+	go vet ./...
+
+.PHONY: test test-short vet build default

README.md

@@ -1,48 +1,71 @@
-# Telegraf - A native agent for InfluxDB [![Circle CI](https://circleci.com/gh/influxdb/telegraf.svg?style=svg)](https://circleci.com/gh/influxdb/telegraf)
+# Telegraf [![Circle CI](https://circleci.com/gh/influxdata/telegraf.svg?style=svg)](https://circleci.com/gh/influxdata/telegraf) [![Docker pulls](https://img.shields.io/docker/pulls/library/telegraf.svg)](https://hub.docker.com/_/telegraf/)
 
-Telegraf is an agent written in Go for collecting metrics from the system it's
-running on, or from other services, and writing them into InfluxDB.
+Telegraf is an agent written in Go for collecting, processing, aggregating,
+and writing metrics.
 
 Design goals are to have a minimal memory footprint with a plugin system so
 that developers in the community can easily add support for collecting metrics
 from well known services (like Hadoop, Postgres, or Redis) and third party
 APIs (like Mailchimp, AWS CloudWatch, or Google Analytics).
 
-We'll eagerly accept pull requests for new plugins and will manage the set of
-plugins that Telegraf supports. See the
-[contributing guide](CONTRIBUTING.md) for instructions on
-writing new plugins.
+Telegraf is plugin-driven and has the concept of 4 distinct plugins:
+
+1. [Input Plugins](#input-plugins) collect metrics from the system, services, or 3rd party APIs
+2. [Processor Plugins](#processor-plugins) transform, decorate, and/or filter metrics
+3. [Aggregator Plugins](#aggregator-plugins) create aggregate metrics (e.g. mean, min, max, quantiles, etc.)
+4. [Output Plugins](#output-plugins) write metrics to various destinations
+
+For more information on Processor and Aggregator plugins please [read this](./docs/AGGREGATORS_AND_PROCESSORS.md).
+
+New plugins are designed to be easy to contribute,
+we'll eagerly accept pull
+requests and will manage the set of plugins that Telegraf supports.
+See the [contributing guide](CONTRIBUTING.md) for instructions on writing
+new plugins.
 
 ## Installation:
 
-### Linux deb and rpm packages:
+### Linux deb and rpm Packages:
 
 Latest:
-* http://get.influxdb.org/telegraf/telegraf_0.2.4_amd64.deb
-* http://get.influxdb.org/telegraf/telegraf-0.2.4-1.x86_64.rpm
+* https://dl.influxdata.com/telegraf/releases/telegraf_1.1.1_amd64.deb
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1.x86_64.rpm
 
-##### Package instructions:
+Latest (arm):
+* https://dl.influxdata.com/telegraf/releases/telegraf_1.1.1_armhf.deb
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1.armhf.rpm
 
-* Telegraf binary is installed in `/opt/telegraf/telegraf`
-* Telegraf daemon configuration file is in `/etc/opt/telegraf/telegraf.conf`
+##### Package Instructions:
+
+* Telegraf binary is installed in `/usr/bin/telegraf`
+* Telegraf daemon configuration file is in `/etc/telegraf/telegraf.conf`
 * On sysv systems, the telegraf daemon can be controlled via
 `service telegraf [action]`
 * On systemd systems (such as Ubuntu 15+), the telegraf daemon can be
 controlled via `systemctl [action] telegraf`
 
-### Linux binaries:
+### yum/apt Repositories:
+
+There is a yum/apt repo available for the whole InfluxData stack, see
+[here](https://docs.influxdata.com/influxdb/latest/introduction/installation/#installation)
+for instructions on setting up the repo. Once it is configured, you will be able
+to use this repo to install & update telegraf.
+
+### Linux tarballs:
 
 Latest:
-* http://get.influxdb.org/telegraf/telegraf_linux_amd64_0.2.4.tar.gz
-* http://get.influxdb.org/telegraf/telegraf_linux_386_0.2.4.tar.gz
-* http://get.influxdb.org/telegraf/telegraf_linux_arm_0.2.4.tar.gz
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1_linux_amd64.tar.gz
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1_linux_i386.tar.gz
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1_linux_armhf.tar.gz
 
-##### Binary instructions:
+### FreeBSD tarball:
 
-These are standalone binaries that can be unpacked and executed on any linux
-system. They can be unpacked and renamed in a location such as
-`/usr/local/bin` for convenience. A config file will need to be generated,
-see "How to use it" below.
+Latest:
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1_freebsd_amd64.tar.gz
+
+### Ansible Role:
+
+Ansible role: https://github.com/rossmcdonald/telegraf
 
 ### OSX via Homebrew:
 
@@ -51,87 +74,133 @@ brew update
 brew install telegraf
 ```
 
+### Windows Binaries (EXPERIMENTAL)
+
+Latest:
+* https://dl.influxdata.com/telegraf/releases/telegraf-1.1.1_windows_amd64.zip
+
 ### From Source:
 
 Telegraf manages dependencies via [gdm](https://github.com/sparrc/gdm),
 which gets installed via the Makefile
-if you don't have it already. You also must build with golang version 1.4+.
+if you don't have it already. You also must build with golang version 1.5+.
 
 1. [Install Go](https://golang.org/doc/install)
 2. [Setup your GOPATH](https://golang.org/doc/code.html#GOPATH)
-3. Run `go get github.com/influxdb/telegraf`
-4. Run `cd $GOPATH/src/github.com/influxdb/telegraf`
+3. Run `go get github.com/influxdata/telegraf`
+4. Run `cd $GOPATH/src/github.com/influxdata/telegraf`
 5. Run `make`
 
-### How to use it:
+## How to use it:
 
-* Run `telegraf -sample-config > telegraf.conf` to create an initial configuration.
-* Or run `telegraf -sample-config -filter cpu:mem -outputfilter influxdb > telegraf.conf`.
-to create a config file with only CPU and memory plugins defined, and InfluxDB
-output defined.
-* Edit the configuration to match your needs.
-* Run `telegraf -config telegraf.conf -test` to output one full measurement
-sample to STDOUT. NOTE: you may want to run as the telegraf user if you are using
-the linux packages `sudo -u telegraf telegraf -config telegraf.conf -test`
-* Run `telegraf -config telegraf.conf` to gather and send metrics to configured outputs.
-* Run `telegraf -config telegraf.conf -filter system:swap`.
-to run telegraf with only the system & swap plugins defined in the config.
+See usage with:
 
-## Telegraf Options
+```
+telegraf --help
+```
 
-Telegraf has a few options you can configure under the `agent` section of the
-config.
+### Generate a telegraf config file:
+
+```
+telegraf config > telegraf.conf
+```
+
+### Generate config with only cpu input & influxdb output plugins defined
+
+```
+telegraf --input-filter cpu --output-filter influxdb config
+```
+
+### Run a single telegraf collection, outputing metrics to stdout
+
+```
+telegraf --config telegraf.conf -test
+```
+
+### Run telegraf with all plugins defined in config file
+
+```
+telegraf --config telegraf.conf
+```
+
+### Run telegraf, enabling the cpu & memory input, and influxdb output plugins
+
+```
+telegraf --config telegraf.conf -input-filter cpu:mem -output-filter influxdb
+```
 
-* **hostname**: The hostname is passed as a tag. By default this will be
-the value returned by `hostname` on the machine running Telegraf.
-You can override that value here.
-* **interval**: How often to gather metrics. Uses a simple number +
-unit parser, e.g. "10s" for 10 seconds or "5m" for 5 minutes.
-* **debug**: Set to true to gather and send metrics to STDOUT as well as
-InfluxDB.
 
 ## Configuration
 
-See the [configuration guide](CONFIGURATION.md) for a rundown of the more advanced
+See the [configuration guide](docs/CONFIGURATION.md) for a rundown of the more advanced
 configuration options.
 
-## Supported Plugins
+## Input Plugins
 
-**You can view usage instructions for each plugin by running**
-`telegraf -usage <pluginname>`.
-
-Telegraf currently has support for collecting metrics from:
-
-* aerospike
-* apache
-* bcache
-* disque
-* elasticsearch
-* exec (generic JSON-emitting executable plugin)
-* haproxy
-* httpjson (generic JSON-emitting http service plugin)
-* influxdb
-* jolokia
-* leofs
-* lustre2
-* mailchimp
-* memcached
-* mongodb
-* mysql
-* nginx
-* phpfpm
-* ping
-* postgresql
-* procstat
-* prometheus
-* puppetagent
-* rabbitmq
-* redis
-* rethinkdb
-* twemproxy
-* zfs
-* zookeeper
-* system
+* [aws cloudwatch](./plugins/inputs/cloudwatch)
+* [aerospike](./plugins/inputs/aerospike)
+* [apache](./plugins/inputs/apache)
+* [bcache](./plugins/inputs/bcache)
+* [cassandra](./plugins/inputs/cassandra)
+* [ceph](./plugins/inputs/ceph)
+* [chrony](./plugins/inputs/chrony)
+* [consul](./plugins/inputs/consul)
+* [conntrack](./plugins/inputs/conntrack)
+* [couchbase](./plugins/inputs/couchbase)
+* [couchdb](./plugins/inputs/couchdb)
+* [disque](./plugins/inputs/disque)
+* [dns query time](./plugins/inputs/dns_query)
+* [docker](./plugins/inputs/docker)
+* [dovecot](./plugins/inputs/dovecot)
+* [elasticsearch](./plugins/inputs/elasticsearch)
+* [exec](./plugins/inputs/exec) (generic executable plugin, support JSON, influx, graphite and nagios)
+* [filestat](./plugins/inputs/filestat)
+* [haproxy](./plugins/inputs/haproxy)
+* [hddtemp](./plugins/inputs/hddtemp)
+* [http_response](./plugins/inputs/http_response)
+* [httpjson](./plugins/inputs/httpjson) (generic JSON-emitting http service plugin)
+* [internal](./plugins/inputs/internal)
+* [influxdb](./plugins/inputs/influxdb)
+* [ipmi_sensor](./plugins/inputs/ipmi_sensor)
+* [iptables](./plugins/inputs/iptables)
+* [jolokia](./plugins/inputs/jolokia)
+* [leofs](./plugins/inputs/leofs)
+* [lustre2](./plugins/inputs/lustre2)
+* [mailchimp](./plugins/inputs/mailchimp)
+* [memcached](./plugins/inputs/memcached)
+* [mesos](./plugins/inputs/mesos)
+* [mongodb](./plugins/inputs/mongodb)
+* [mysql](./plugins/inputs/mysql)
+* [net_response](./plugins/inputs/net_response)
+* [nginx](./plugins/inputs/nginx)
+* [nsq](./plugins/inputs/nsq)
+* [nstat](./plugins/inputs/nstat)
+* [ntpq](./plugins/inputs/ntpq)
+* [phpfpm](./plugins/inputs/phpfpm)
+* [phusion passenger](./plugins/inputs/passenger)
+* [ping](./plugins/inputs/ping)
+* [postgresql](./plugins/inputs/postgresql)
+* [postgresql_extensible](./plugins/inputs/postgresql_extensible)
+* [powerdns](./plugins/inputs/powerdns)
+* [procstat](./plugins/inputs/procstat)
+* [prometheus](./plugins/inputs/prometheus)
+* [puppetagent](./plugins/inputs/puppetagent)
+* [rabbitmq](./plugins/inputs/rabbitmq)
+* [raindrops](./plugins/inputs/raindrops)
+* [redis](./plugins/inputs/redis)
+* [rethinkdb](./plugins/inputs/rethinkdb)
+* [riak](./plugins/inputs/riak)
+* [sensors](./plugins/inputs/sensors)
+* [snmp](./plugins/inputs/snmp)
+* [snmp_legacy](./plugins/inputs/snmp_legacy)
+* [sql server](./plugins/inputs/sqlserver) (microsoft)
+* [twemproxy](./plugins/inputs/twemproxy)
+* [varnish](./plugins/inputs/varnish)
+* [zfs](./plugins/inputs/zfs)
+* [zookeeper](./plugins/inputs/zookeeper)
+* [win_perf_counters ](./plugins/inputs/win_perf_counters) (windows performance counters)
+* [sysstat](./plugins/inputs/sysstat)
+* [system](./plugins/inputs/system)
     * cpu
     * mem
     * net
@@ -139,33 +208,60 @@ Telegraf currently has support for collecting metrics from:
     * disk
     * diskio
     * swap
+    * processes
+    * kernel (/proc/stat)
+    * kernel (/proc/vmstat)
 
-## Supported Service Plugins
+Telegraf can also collect metrics via the following service plugins:
 
-Telegraf can collect metrics via the following services:
+* [http_listener](./plugins/inputs/http_listener)
+* [kafka_consumer](./plugins/inputs/kafka_consumer)
+* [mqtt_consumer](./plugins/inputs/mqtt_consumer)
+* [nats_consumer](./plugins/inputs/nats_consumer)
+* [nsq_consumer](./plugins/inputs/nsq_consumer)
+* [logparser](./plugins/inputs/logparser)
+* [statsd](./plugins/inputs/statsd)
+* [tail](./plugins/inputs/tail)
+* [tcp_listener](./plugins/inputs/tcp_listener)
+* [udp_listener](./plugins/inputs/udp_listener)
+* [webhooks](./plugins/inputs/webhooks)
+  * [filestack](./plugins/inputs/webhooks/filestack)
+  * [github](./plugins/inputs/webhooks/github)
+  * [mandrill](./plugins/inputs/webhooks/mandrill)
+  * [rollbar](./plugins/inputs/webhooks/rollbar)
 
-* statsd
-* kafka_consumer
+## Processor Plugins
 
-We'll be adding support for many more over the coming months. Read on if you
-want to add support for another service or third-party API.
+* [printer](./plugins/processors/printer)
 
-## Supported Outputs
+## Aggregator Plugins
 
-* influxdb
-* nsq
-* kafka
-* datadog
-* opentsdb
-* amqp (rabbitmq)
-* mqtt
-* librato
-* prometheus
-* amon
-* riemann
+* [minmax](./plugins/aggregators/minmax)
+
+## Output Plugins
+
+* [influxdb](./plugins/outputs/influxdb)
+* [amon](./plugins/outputs/amon)
+* [amqp](./plugins/outputs/amqp)
+* [aws kinesis](./plugins/outputs/kinesis)
+* [aws cloudwatch](./plugins/outputs/cloudwatch)
+* [datadog](./plugins/outputs/datadog)
+* [discard](./plugins/outputs/discard)
+* [file](./plugins/outputs/file)
+* [graphite](./plugins/outputs/graphite)
+* [graylog](./plugins/outputs/graylog)
+* [instrumental](./plugins/outputs/instrumental)
+* [kafka](./plugins/outputs/kafka)
+* [librato](./plugins/outputs/librato)
+* [mqtt](./plugins/outputs/mqtt)
+* [nats](./plugins/outputs/nats)
+* [nsq](./plugins/outputs/nsq)
+* [opentsdb](./plugins/outputs/opentsdb)
+* [prometheus](./plugins/outputs/prometheus_client)
+* [riemann](./plugins/outputs/riemann)
 
 ## Contributing
 
 Please see the
 [contributing guide](CONTRIBUTING.md)
-for details on contributing a plugin or output to Telegraf.
+for details on contributing a plugin to Telegraf.

accumulator.go

@@ -1,184 +1,34 @@
 package telegraf
 
-import (
-	"fmt"
-	"log"
-	"math"
-	"sync"
-	"time"
-
-	"github.com/influxdb/telegraf/internal/config"
-
-	"github.com/influxdb/influxdb/client/v2"
-)
+import "time"
 
+// Accumulator is an interface for "accumulating" metrics from plugin(s).
+// The metrics are sent down a channel shared between all plugins.
 type Accumulator interface {
-	Add(measurement string, value interface{},
-		tags map[string]string, t ...time.Time)
-	AddFields(measurement string, fields map[string]interface{},
-		tags map[string]string, t ...time.Time)
+	// AddFields adds a metric to the accumulator with the given measurement
+	// name, fields, and tags (and timestamp). If a timestamp is not provided,
+	// then the accumulator sets it to "now".
+	// Create a point with a value, decorating it with tags
+	// NOTE: tags is expected to be owned by the caller, don't mutate
+	// it after passing to Add.
+	AddFields(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
 
-	SetDefaultTags(tags map[string]string)
-	AddDefaultTag(key, value string)
+	// AddGauge is the same as AddFields, but will add the metric as a "Gauge" type
+	AddGauge(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
 
-	Prefix() string
-	SetPrefix(prefix string)
+	// AddCounter is the same as AddFields, but will add the metric as a "Counter" type
+	AddCounter(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
 
-	Debug() bool
-	SetDebug(enabled bool)
-}
-
-func NewAccumulator(
-	pluginConfig *config.PluginConfig,
-	points chan *client.Point,
-) Accumulator {
-	acc := accumulator{}
-	acc.points = points
-	acc.pluginConfig = pluginConfig
-	return &acc
-}
-
-type accumulator struct {
-	sync.Mutex
-
-	points chan *client.Point
-
-	defaultTags map[string]string
-
-	debug bool
-
-	pluginConfig *config.PluginConfig
-
-	prefix string
-}
-
-func (ac *accumulator) Add(
-	measurement string,
-	value interface{},
-	tags map[string]string,
-	t ...time.Time,
-) {
-	fields := make(map[string]interface{})
-	fields["value"] = value
-	ac.AddFields(measurement, fields, tags, t...)
-}
-
-func (ac *accumulator) AddFields(
-	measurement string,
-	fields map[string]interface{},
-	tags map[string]string,
-	t ...time.Time,
-) {
-	if !ac.pluginConfig.Filter.ShouldTagsPass(tags) {
-		return
-	}
-
-	// Override measurement name if set
-	if len(ac.pluginConfig.NameOverride) != 0 {
-		measurement = ac.pluginConfig.NameOverride
-	}
-	// Apply measurement prefix and suffix if set
-	if len(ac.pluginConfig.MeasurementPrefix) != 0 {
-		measurement = ac.pluginConfig.MeasurementPrefix + measurement
-	}
-	if len(ac.pluginConfig.MeasurementSuffix) != 0 {
-		measurement = measurement + ac.pluginConfig.MeasurementSuffix
-	}
-
-	if tags == nil {
-		tags = make(map[string]string)
-	}
-	// Apply plugin-wide tags if set
-	for k, v := range ac.pluginConfig.Tags {
-		if _, ok := tags[k]; !ok {
-			tags[k] = v
-		}
-	}
-	// Apply daemon-wide tags if set
-	for k, v := range ac.defaultTags {
-		if _, ok := tags[k]; !ok {
-			tags[k] = v
-		}
-	}
-
-	result := make(map[string]interface{})
-	for k, v := range fields {
-		// Filter out any filtered fields
-		if ac.pluginConfig != nil {
-			if !ac.pluginConfig.Filter.ShouldPass(k) {
-				continue
-			}
-		}
-		result[k] = v
-
-		// Validate uint64 and float64 fields
-		switch val := v.(type) {
-		case uint64:
-			// InfluxDB does not support writing uint64
-			if val < uint64(9223372036854775808) {
-				result[k] = int64(val)
-			} else {
-				result[k] = int64(9223372036854775807)
-			}
-		case float64:
-			// NaNs are invalid values in influxdb, skip measurement
-			if math.IsNaN(val) || math.IsInf(val, 0) {
-				if ac.debug {
-					log.Printf("Measurement [%s] field [%s] has a NaN or Inf "+
-						"field, skipping",
-						measurement, k)
-				}
-				continue
-			}
-		}
-	}
-	fields = nil
-	if len(result) == 0 {
-		return
-	}
-
-	var timestamp time.Time
-	if len(t) > 0 {
-		timestamp = t[0]
-	} else {
-		timestamp = time.Now()
-	}
-
-	if ac.prefix != "" {
-		measurement = ac.prefix + measurement
-	}
-
-	pt, err := client.NewPoint(measurement, tags, result, timestamp)
-	if err != nil {
-		log.Printf("Error adding point [%s]: %s\n", measurement, err.Error())
-		return
-	}
-	if ac.debug {
-		fmt.Println("> " + pt.String())
-	}
-	ac.points <- pt
-}
-
-func (ac *accumulator) SetDefaultTags(tags map[string]string) {
-	ac.defaultTags = tags
-}
-
-func (ac *accumulator) AddDefaultTag(key, value string) {
-	ac.defaultTags[key] = value
-}
-
-func (ac *accumulator) Prefix() string {
-	return ac.prefix
-}
-
-func (ac *accumulator) SetPrefix(prefix string) {
-	ac.prefix = prefix
-}
-
-func (ac *accumulator) Debug() bool {
-	return ac.debug
-}
-
-func (ac *accumulator) SetDebug(debug bool) {
-	ac.debug = debug
+	SetPrecision(precision, interval time.Duration)
+
+	AddError(err error)
 }

agent.go

@@ -1,397 +0,0 @@
-package telegraf
-
-import (
-	"crypto/rand"
-	"fmt"
-	"log"
-	"math/big"
-	"os"
-	"sync"
-	"time"
-
-	"github.com/influxdb/telegraf/internal/config"
-	"github.com/influxdb/telegraf/outputs"
-	"github.com/influxdb/telegraf/plugins"
-
-	"github.com/influxdb/influxdb/client/v2"
-)
-
-// Agent runs telegraf and collects data based on the given config
-type Agent struct {
-	Config *config.Config
-}
-
-// NewAgent returns an Agent struct based off the given Config
-func NewAgent(config *config.Config) (*Agent, error) {
-	a := &Agent{
-		Config: config,
-	}
-
-	if a.Config.Agent.Hostname == "" {
-		hostname, err := os.Hostname()
-		if err != nil {
-			return nil, err
-		}
-
-		a.Config.Agent.Hostname = hostname
-	}
-
-	config.Tags["host"] = a.Config.Agent.Hostname
-
-	return a, nil
-}
-
-// Connect connects to all configured outputs
-func (a *Agent) Connect() error {
-	for _, o := range a.Config.Outputs {
-		switch ot := o.Output.(type) {
-		case outputs.ServiceOutput:
-			if err := ot.Start(); err != nil {
-				log.Printf("Service for output %s failed to start, exiting\n%s\n",
-					o.Name, err.Error())
-				return err
-			}
-		}
-
-		if a.Config.Agent.Debug {
-			log.Printf("Attempting connection to output: %s\n", o.Name)
-		}
-		err := o.Output.Connect()
-		if err != nil {
-			log.Printf("Failed to connect to output %s, retrying in 15s\n", o.Name)
-			time.Sleep(15 * time.Second)
-			err = o.Output.Connect()
-			if err != nil {
-				return err
-			}
-		}
-		if a.Config.Agent.Debug {
-			log.Printf("Successfully connected to output: %s\n", o.Name)
-		}
-	}
-	return nil
-}
-
-// Close closes the connection to all configured outputs
-func (a *Agent) Close() error {
-	var err error
-	for _, o := range a.Config.Outputs {
-		err = o.Output.Close()
-		switch ot := o.Output.(type) {
-		case outputs.ServiceOutput:
-			ot.Stop()
-		}
-	}
-	return err
-}
-
-// gatherParallel runs the plugins that are using the same reporting interval
-// as the telegraf agent.
-func (a *Agent) gatherParallel(pointChan chan *client.Point) error {
-	var wg sync.WaitGroup
-
-	start := time.Now()
-	counter := 0
-	for _, plugin := range a.Config.Plugins {
-		if plugin.Config.Interval != 0 {
-			continue
-		}
-
-		wg.Add(1)
-		counter++
-		go func(plugin *config.RunningPlugin) {
-			defer wg.Done()
-
-			acc := NewAccumulator(plugin.Config, pointChan)
-			acc.SetDebug(a.Config.Agent.Debug)
-			// acc.SetPrefix(plugin.Name + "_")
-			acc.SetDefaultTags(a.Config.Tags)
-
-			if err := plugin.Plugin.Gather(acc); err != nil {
-				log.Printf("Error in plugin [%s]: %s", plugin.Name, err)
-			}
-
-		}(plugin)
-	}
-
-	if counter == 0 {
-		return nil
-	}
-
-	wg.Wait()
-
-	elapsed := time.Since(start)
-	log.Printf("Gathered metrics, (%s interval), from %d plugins in %s\n",
-		a.Config.Agent.Interval, counter, elapsed)
-	return nil
-}
-
-// gatherSeparate runs the plugins that have been configured with their own
-// reporting interval.
-func (a *Agent) gatherSeparate(
-	shutdown chan struct{},
-	plugin *config.RunningPlugin,
-	pointChan chan *client.Point,
-) error {
-	ticker := time.NewTicker(plugin.Config.Interval)
-
-	for {
-		var outerr error
-		start := time.Now()
-
-		acc := NewAccumulator(plugin.Config, pointChan)
-		acc.SetDebug(a.Config.Agent.Debug)
-		// acc.SetPrefix(plugin.Name + "_")
-		acc.SetDefaultTags(a.Config.Tags)
-
-		if err := plugin.Plugin.Gather(acc); err != nil {
-			log.Printf("Error in plugin [%s]: %s", plugin.Name, err)
-		}
-
-		elapsed := time.Since(start)
-		log.Printf("Gathered metrics, (separate %s interval), from %s in %s\n",
-			plugin.Config.Interval, plugin.Name, elapsed)
-
-		if outerr != nil {
-			return outerr
-		}
-
-		select {
-		case <-shutdown:
-			return nil
-		case <-ticker.C:
-			continue
-		}
-	}
-}
-
-// Test verifies that we can 'Gather' from all plugins with their configured
-// Config struct
-func (a *Agent) Test() error {
-	shutdown := make(chan struct{})
-	defer close(shutdown)
-	pointChan := make(chan *client.Point)
-
-	// dummy receiver for the point channel
-	go func() {
-		for {
-			select {
-			case <-pointChan:
-				// do nothing
-			case <-shutdown:
-				return
-			}
-		}
-	}()
-
-	for _, plugin := range a.Config.Plugins {
-		acc := NewAccumulator(plugin.Config, pointChan)
-		acc.SetDebug(true)
-		// acc.SetPrefix(plugin.Name + "_")
-
-		fmt.Printf("* Plugin: %s, Collection 1\n", plugin.Name)
-		if plugin.Config.Interval != 0 {
-			fmt.Printf("* Internal: %s\n", plugin.Config.Interval)
-		}
-
-		if err := plugin.Plugin.Gather(acc); err != nil {
-			return err
-		}
-
-		// Special instructions for some plugins. cpu, for example, needs to be
-		// run twice in order to return cpu usage percentages.
-		switch plugin.Name {
-		case "cpu", "mongodb":
-			time.Sleep(500 * time.Millisecond)
-			fmt.Printf("* Plugin: %s, Collection 2\n", plugin.Name)
-			if err := plugin.Plugin.Gather(acc); err != nil {
-				return err
-			}
-		}
-
-	}
-	return nil
-}
-
-// writeOutput writes a list of points to a single output, with retries.
-// Optionally takes a `done` channel to indicate that it is done writing.
-func (a *Agent) writeOutput(
-	points []*client.Point,
-	ro *config.RunningOutput,
-	shutdown chan struct{},
-	wg *sync.WaitGroup,
-) {
-	defer wg.Done()
-	if len(points) == 0 {
-		return
-	}
-	retry := 0
-	retries := a.Config.Agent.FlushRetries
-	start := time.Now()
-
-	for {
-		filtered := ro.FilterPoints(points)
-		err := ro.Output.Write(filtered)
-		if err == nil {
-			// Write successful
-			elapsed := time.Since(start)
-			log.Printf("Flushed %d metrics to output %s in %s\n",
-				len(filtered), ro.Name, elapsed)
-			return
-		}
-
-		select {
-		case <-shutdown:
-			return
-		default:
-			if retry >= retries {
-				// No more retries
-				msg := "FATAL: Write to output [%s] failed %d times, dropping" +
-					" %d metrics\n"
-				log.Printf(msg, ro.Name, retries+1, len(points))
-				return
-			} else if err != nil {
-				// Sleep for a retry
-				log.Printf("Error in output [%s]: %s, retrying in %s",
-					ro.Name, err.Error(), a.Config.Agent.FlushInterval.Duration)
-				time.Sleep(a.Config.Agent.FlushInterval.Duration)
-			}
-		}
-
-		retry++
-	}
-}
-
-// flush writes a list of points to all configured outputs
-func (a *Agent) flush(
-	points []*client.Point,
-	shutdown chan struct{},
-	wait bool,
-) {
-	var wg sync.WaitGroup
-	for _, o := range a.Config.Outputs {
-		wg.Add(1)
-		go a.writeOutput(points, o, shutdown, &wg)
-	}
-	if wait {
-		wg.Wait()
-	}
-}
-
-// flusher monitors the points input channel and flushes on the minimum interval
-func (a *Agent) flusher(shutdown chan struct{}, pointChan chan *client.Point) error {
-	// Inelegant, but this sleep is to allow the Gather threads to run, so that
-	// the flusher will flush after metrics are collected.
-	time.Sleep(time.Millisecond * 100)
-
-	ticker := time.NewTicker(a.Config.Agent.FlushInterval.Duration)
-	points := make([]*client.Point, 0)
-
-	for {
-		select {
-		case <-shutdown:
-			log.Println("Hang on, flushing any cached points before shutdown")
-			a.flush(points, shutdown, true)
-			return nil
-		case <-ticker.C:
-			a.flush(points, shutdown, false)
-			points = make([]*client.Point, 0)
-		case pt := <-pointChan:
-			points = append(points, pt)
-		}
-	}
-}
-
-// jitterInterval applies the the interval jitter to the flush interval using
-// crypto/rand number generator
-func jitterInterval(ininterval, injitter time.Duration) time.Duration {
-	var jitter int64
-	outinterval := ininterval
-	if injitter.Nanoseconds() != 0 {
-		maxjitter := big.NewInt(injitter.Nanoseconds())
-		if j, err := rand.Int(rand.Reader, maxjitter); err == nil {
-			jitter = j.Int64()
-		}
-		outinterval = time.Duration(jitter + ininterval.Nanoseconds())
-	}
-
-	if outinterval.Nanoseconds() < time.Duration(500*time.Millisecond).Nanoseconds() {
-		log.Printf("Flush interval %s too low, setting to 500ms\n", outinterval)
-		outinterval = time.Duration(500 * time.Millisecond)
-	}
-
-	return outinterval
-}
-
-// Run runs the agent daemon, gathering every Interval
-func (a *Agent) Run(shutdown chan struct{}) error {
-	var wg sync.WaitGroup
-
-	a.Config.Agent.FlushInterval.Duration = jitterInterval(a.Config.Agent.FlushInterval.Duration,
-		a.Config.Agent.FlushJitter.Duration)
-
-	log.Printf("Agent Config: Interval:%s, Debug:%#v, Hostname:%#v, "+
-		"Flush Interval:%s\n",
-		a.Config.Agent.Interval, a.Config.Agent.Debug,
-		a.Config.Agent.Hostname, a.Config.Agent.FlushInterval)
-
-	// channel shared between all plugin threads for accumulating points
-	pointChan := make(chan *client.Point, 1000)
-
-	// Round collection to nearest interval by sleeping
-	if a.Config.Agent.RoundInterval {
-		i := int64(a.Config.Agent.Interval.Duration)
-		time.Sleep(time.Duration(i - (time.Now().UnixNano() % i)))
-	}
-	ticker := time.NewTicker(a.Config.Agent.Interval.Duration)
-
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		if err := a.flusher(shutdown, pointChan); err != nil {
-			log.Printf("Flusher routine failed, exiting: %s\n", err.Error())
-			close(shutdown)
-		}
-	}()
-
-	for _, plugin := range a.Config.Plugins {
-
-		// Start service of any ServicePlugins
-		switch p := plugin.Plugin.(type) {
-		case plugins.ServicePlugin:
-			if err := p.Start(); err != nil {
-				log.Printf("Service for plugin %s failed to start, exiting\n%s\n",
-					plugin.Name, err.Error())
-				return err
-			}
-			defer p.Stop()
-		}
-
-		// Special handling for plugins that have their own collection interval
-		// configured. Default intervals are handled below with gatherParallel
-		if plugin.Config.Interval != 0 {
-			wg.Add(1)
-			go func(plugin *config.RunningPlugin) {
-				defer wg.Done()
-				if err := a.gatherSeparate(shutdown, plugin, pointChan); err != nil {
-					log.Printf(err.Error())
-				}
-			}(plugin)
-		}
-	}
-
-	defer wg.Wait()
-
-	for {
-		if err := a.gatherParallel(pointChan); err != nil {
-			log.Printf(err.Error())
-		}
-
-		select {
-		case <-shutdown:
-			return nil
-		case <-ticker.C:
-			continue
-		}
-	}
-}

agent/accumulator.go

@@ -0,0 +1,119 @@
+package agent
+
+import (
+	"log"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+var (
+	NErrors = selfstat.Register("agent", "gather_errors", map[string]string{})
+)
+
+type MetricMaker interface {
+	Name() string
+	MakeMetric(
+		measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		mType telegraf.ValueType,
+		t time.Time,
+	) telegraf.Metric
+}
+
+func NewAccumulator(
+	maker MetricMaker,
+	metrics chan telegraf.Metric,
+) *accumulator {
+	acc := accumulator{
+		maker:     maker,
+		metrics:   metrics,
+		precision: time.Nanosecond,
+	}
+	return &acc
+}
+
+type accumulator struct {
+	metrics chan telegraf.Metric
+
+	maker MetricMaker
+
+	precision time.Duration
+}
+
+func (ac *accumulator) AddFields(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	if m := ac.maker.MakeMetric(measurement, fields, tags, telegraf.Untyped, ac.getTime(t)); m != nil {
+		ac.metrics <- m
+	}
+}
+
+func (ac *accumulator) AddGauge(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	if m := ac.maker.MakeMetric(measurement, fields, tags, telegraf.Gauge, ac.getTime(t)); m != nil {
+		ac.metrics <- m
+	}
+}
+
+func (ac *accumulator) AddCounter(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	if m := ac.maker.MakeMetric(measurement, fields, tags, telegraf.Counter, ac.getTime(t)); m != nil {
+		ac.metrics <- m
+	}
+}
+
+// AddError passes a runtime error to the accumulator.
+// The error will be tagged with the plugin name and written to the log.
+func (ac *accumulator) AddError(err error) {
+	if err == nil {
+		return
+	}
+	NErrors.Incr(1)
+	//TODO suppress/throttle consecutive duplicate errors?
+	log.Printf("E! Error in plugin [%s]: %s", ac.maker.Name(), err)
+}
+
+// SetPrecision takes two time.Duration objects. If the first is non-zero,
+// it sets that as the precision. Otherwise, it takes the second argument
+// as the order of time that the metrics should be rounded to, with the
+// maximum being 1s.
+func (ac *accumulator) SetPrecision(precision, interval time.Duration) {
+	if precision > 0 {
+		ac.precision = precision
+		return
+	}
+	switch {
+	case interval >= time.Second:
+		ac.precision = time.Second
+	case interval >= time.Millisecond:
+		ac.precision = time.Millisecond
+	case interval >= time.Microsecond:
+		ac.precision = time.Microsecond
+	default:
+		ac.precision = time.Nanosecond
+	}
+}
+
+func (ac accumulator) getTime(t []time.Time) time.Time {
+	var timestamp time.Time
+	if len(t) > 0 {
+		timestamp = t[0]
+	} else {
+		timestamp = time.Now()
+	}
+	return timestamp.Round(ac.precision)
+}

agent/accumulator_test.go

@@ -0,0 +1,340 @@
+package agent
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/metric"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAdd(t *testing.T) {
+	now := time.Now()
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", now.UnixNano()),
+		actual)
+}
+
+func TestAddFields(t *testing.T) {
+	now := time.Now()
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	fields := map[string]interface{}{
+		"usage": float64(99),
+	}
+	a.AddFields("acctest", fields, map[string]string{})
+	a.AddGauge("acctest", fields, map[string]string{"acc": "test"})
+	a.AddCounter("acctest", fields, map[string]string{"acc": "test"}, now)
+
+	testm := <-metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest usage=99")
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test usage=99")
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test usage=99 %d\n", now.UnixNano()),
+		actual)
+}
+
+func TestAccAddError(t *testing.T) {
+	errBuf := bytes.NewBuffer(nil)
+	log.SetOutput(errBuf)
+	defer log.SetOutput(os.Stderr)
+
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.AddError(fmt.Errorf("foo"))
+	a.AddError(fmt.Errorf("bar"))
+	a.AddError(fmt.Errorf("baz"))
+
+	errs := bytes.Split(errBuf.Bytes(), []byte{'\n'})
+	assert.EqualValues(t, int64(3), NErrors.Get())
+	require.Len(t, errs, 4) // 4 because of trailing newline
+	assert.Contains(t, string(errs[0]), "TestPlugin")
+	assert.Contains(t, string(errs[0]), "foo")
+	assert.Contains(t, string(errs[1]), "TestPlugin")
+	assert.Contains(t, string(errs[1]), "bar")
+	assert.Contains(t, string(errs[2]), "TestPlugin")
+	assert.Contains(t, string(errs[2]), "baz")
+}
+
+func TestAddNoIntervalWithPrecision(t *testing.T) {
+	now := time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC)
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+	a.SetPrecision(0, time.Second)
+
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-a.metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800000000000)),
+		actual)
+}
+
+func TestAddDisablePrecision(t *testing.T) {
+	now := time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC)
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.SetPrecision(time.Nanosecond, 0)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-a.metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800082912748)),
+		actual)
+}
+
+func TestAddNoPrecisionWithInterval(t *testing.T) {
+	now := time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC)
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.SetPrecision(0, time.Second)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-a.metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800000000000)),
+		actual)
+}
+
+func TestDifferentPrecisions(t *testing.T) {
+	now := time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC)
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.SetPrecision(0, time.Second)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+	testm := <-a.metrics
+	actual := testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800000000000)),
+		actual)
+
+	a.SetPrecision(0, time.Millisecond)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800083000000)),
+		actual)
+
+	a.SetPrecision(0, time.Microsecond)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800082913000)),
+		actual)
+
+	a.SetPrecision(0, time.Nanosecond)
+	a.AddFields("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+	testm = <-a.metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", int64(1139572800082912748)),
+		actual)
+}
+
+func TestAddGauge(t *testing.T) {
+	now := time.Now()
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.AddGauge("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddGauge("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddGauge("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+	assert.Equal(t, testm.Type(), telegraf.Gauge)
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+	assert.Equal(t, testm.Type(), telegraf.Gauge)
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", now.UnixNano()),
+		actual)
+	assert.Equal(t, testm.Type(), telegraf.Gauge)
+}
+
+func TestAddCounter(t *testing.T) {
+	now := time.Now()
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.AddCounter("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{})
+	a.AddCounter("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"})
+	a.AddCounter("acctest",
+		map[string]interface{}{"value": float64(101)},
+		map[string]string{"acc": "test"}, now)
+
+	testm := <-metrics
+	actual := testm.String()
+	assert.Contains(t, actual, "acctest value=101")
+	assert.Equal(t, testm.Type(), telegraf.Counter)
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Contains(t, actual, "acctest,acc=test value=101")
+	assert.Equal(t, testm.Type(), telegraf.Counter)
+
+	testm = <-metrics
+	actual = testm.String()
+	assert.Equal(t,
+		fmt.Sprintf("acctest,acc=test value=101 %d\n", now.UnixNano()),
+		actual)
+	assert.Equal(t, testm.Type(), telegraf.Counter)
+}
+
+type TestMetricMaker struct {
+}
+
+func (tm *TestMetricMaker) Name() string {
+	return "TestPlugin"
+}
+func (tm *TestMetricMaker) MakeMetric(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	mType telegraf.ValueType,
+	t time.Time,
+) telegraf.Metric {
+	switch mType {
+	case telegraf.Untyped:
+		if m, err := metric.New(measurement, tags, fields, t); err == nil {
+			return m
+		}
+	case telegraf.Counter:
+		if m, err := metric.New(measurement, tags, fields, t, telegraf.Counter); err == nil {
+			return m
+		}
+	case telegraf.Gauge:
+		if m, err := metric.New(measurement, tags, fields, t, telegraf.Gauge); err == nil {
+			return m
+		}
+	}
+	return nil
+}

agent/agent.go

@@ -0,0 +1,385 @@
+package agent
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/internal/config"
+	"github.com/influxdata/telegraf/internal/models"
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+// Agent runs telegraf and collects data based on the given config
+type Agent struct {
+	Config *config.Config
+}
+
+// NewAgent returns an Agent struct based off the given Config
+func NewAgent(config *config.Config) (*Agent, error) {
+	a := &Agent{
+		Config: config,
+	}
+
+	if !a.Config.Agent.OmitHostname {
+		if a.Config.Agent.Hostname == "" {
+			hostname, err := os.Hostname()
+			if err != nil {
+				return nil, err
+			}
+
+			a.Config.Agent.Hostname = hostname
+		}
+
+		config.Tags["host"] = a.Config.Agent.Hostname
+	}
+
+	return a, nil
+}
+
+// Connect connects to all configured outputs
+func (a *Agent) Connect() error {
+	for _, o := range a.Config.Outputs {
+		switch ot := o.Output.(type) {
+		case telegraf.ServiceOutput:
+			if err := ot.Start(); err != nil {
+				log.Printf("E! Service for output %s failed to start, exiting\n%s\n",
+					o.Name, err.Error())
+				return err
+			}
+		}
+
+		log.Printf("D! Attempting connection to output: %s\n", o.Name)
+		err := o.Output.Connect()
+		if err != nil {
+			log.Printf("E! Failed to connect to output %s, retrying in 15s, "+
+				"error was '%s' \n", o.Name, err)
+			time.Sleep(15 * time.Second)
+			err = o.Output.Connect()
+			if err != nil {
+				return err
+			}
+		}
+		log.Printf("D! Successfully connected to output: %s\n", o.Name)
+	}
+	return nil
+}
+
+// Close closes the connection to all configured outputs
+func (a *Agent) Close() error {
+	var err error
+	for _, o := range a.Config.Outputs {
+		err = o.Output.Close()
+		switch ot := o.Output.(type) {
+		case telegraf.ServiceOutput:
+			ot.Stop()
+		}
+	}
+	return err
+}
+
+func panicRecover(input *models.RunningInput) {
+	if err := recover(); err != nil {
+		trace := make([]byte, 2048)
+		runtime.Stack(trace, true)
+		log.Printf("E! FATAL: Input [%s] panicked: %s, Stack:\n%s\n",
+			input.Name(), err, trace)
+		log.Println("E! PLEASE REPORT THIS PANIC ON GITHUB with " +
+			"stack trace, configuration, and OS information: " +
+			"https://github.com/influxdata/telegraf/issues/new")
+	}
+}
+
+// gatherer runs the inputs that have been configured with their own
+// reporting interval.
+func (a *Agent) gatherer(
+	shutdown chan struct{},
+	input *models.RunningInput,
+	interval time.Duration,
+	metricC chan telegraf.Metric,
+) {
+	defer panicRecover(input)
+
+	GatherTime := selfstat.RegisterTiming("gather",
+		"gather_time_ns",
+		map[string]string{"input": input.Config.Name},
+	)
+
+	acc := NewAccumulator(input, metricC)
+	acc.SetPrecision(a.Config.Agent.Precision.Duration,
+		a.Config.Agent.Interval.Duration)
+
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	for {
+		internal.RandomSleep(a.Config.Agent.CollectionJitter.Duration, shutdown)
+
+		start := time.Now()
+		gatherWithTimeout(shutdown, input, acc, interval)
+		elapsed := time.Since(start)
+
+		GatherTime.Incr(elapsed.Nanoseconds())
+
+		select {
+		case <-shutdown:
+			return
+		case <-ticker.C:
+			continue
+		}
+	}
+}
+
+// gatherWithTimeout gathers from the given input, with the given timeout.
+//   when the given timeout is reached, gatherWithTimeout logs an error message
+//   but continues waiting for it to return. This is to avoid leaving behind
+//   hung processes, and to prevent re-calling the same hung process over and
+//   over.
+func gatherWithTimeout(
+	shutdown chan struct{},
+	input *models.RunningInput,
+	acc *accumulator,
+	timeout time.Duration,
+) {
+	ticker := time.NewTicker(timeout)
+	defer ticker.Stop()
+	done := make(chan error)
+	go func() {
+		done <- input.Input.Gather(acc)
+	}()
+
+	for {
+		select {
+		case err := <-done:
+			if err != nil {
+				log.Printf("E! ERROR in input [%s]: %s", input.Name(), err)
+			}
+			return
+		case <-ticker.C:
+			log.Printf("E! ERROR: input [%s] took longer to collect than "+
+				"collection interval (%s)",
+				input.Name(), timeout)
+			continue
+		case <-shutdown:
+			return
+		}
+	}
+}
+
+// Test verifies that we can 'Gather' from all inputs with their configured
+// Config struct
+func (a *Agent) Test() error {
+	shutdown := make(chan struct{})
+	defer close(shutdown)
+	metricC := make(chan telegraf.Metric)
+
+	// dummy receiver for the point channel
+	go func() {
+		for {
+			select {
+			case <-metricC:
+				// do nothing
+			case <-shutdown:
+				return
+			}
+		}
+	}()
+
+	for _, input := range a.Config.Inputs {
+		acc := NewAccumulator(input, metricC)
+		acc.SetPrecision(a.Config.Agent.Precision.Duration,
+			a.Config.Agent.Interval.Duration)
+		input.SetTrace(true)
+		input.SetDefaultTags(a.Config.Tags)
+
+		fmt.Printf("* Plugin: %s, Collection 1\n", input.Name())
+		if input.Config.Interval != 0 {
+			fmt.Printf("* Internal: %s\n", input.Config.Interval)
+		}
+
+		if err := input.Input.Gather(acc); err != nil {
+			return err
+		}
+
+		// Special instructions for some inputs. cpu, for example, needs to be
+		// run twice in order to return cpu usage percentages.
+		switch input.Name() {
+		case "cpu", "mongodb", "procstat":
+			time.Sleep(500 * time.Millisecond)
+			fmt.Printf("* Plugin: %s, Collection 2\n", input.Name())
+			if err := input.Input.Gather(acc); err != nil {
+				return err
+			}
+		}
+
+	}
+	return nil
+}
+
+// flush writes a list of metrics to all configured outputs
+func (a *Agent) flush() {
+	var wg sync.WaitGroup
+
+	wg.Add(len(a.Config.Outputs))
+	for _, o := range a.Config.Outputs {
+		go func(output *models.RunningOutput) {
+			defer wg.Done()
+			err := output.Write()
+			if err != nil {
+				log.Printf("E! Error writing to output [%s]: %s\n",
+					output.Name, err.Error())
+			}
+		}(o)
+	}
+
+	wg.Wait()
+}
+
+// flusher monitors the metrics input channel and flushes on the minimum interval
+func (a *Agent) flusher(shutdown chan struct{}, metricC chan telegraf.Metric) error {
+	// Inelegant, but this sleep is to allow the Gather threads to run, so that
+	// the flusher will flush after metrics are collected.
+	time.Sleep(time.Millisecond * 300)
+
+	// create an output metric channel and a gorouting that continously passes
+	// each metric onto the output plugins & aggregators.
+	outMetricC := make(chan telegraf.Metric, 100)
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for {
+			select {
+			case <-shutdown:
+				if len(outMetricC) > 0 {
+					// keep going until outMetricC is flushed
+					continue
+				}
+				return
+			case m := <-outMetricC:
+				// if dropOriginal is set to true, then we will only send this
+				// metric to the aggregators, not the outputs.
+				var dropOriginal bool
+				if !m.IsAggregate() {
+					for _, agg := range a.Config.Aggregators {
+						if ok := agg.Add(m.Copy()); ok {
+							dropOriginal = true
+						}
+					}
+				}
+				if !dropOriginal {
+					for i, o := range a.Config.Outputs {
+						if i == len(a.Config.Outputs)-1 {
+							o.AddMetric(m)
+						} else {
+							o.AddMetric(m.Copy())
+						}
+					}
+				}
+			}
+		}
+	}()
+
+	ticker := time.NewTicker(a.Config.Agent.FlushInterval.Duration)
+	for {
+		select {
+		case <-shutdown:
+			log.Println("I! Hang on, flushing any cached metrics before shutdown")
+			// wait for outMetricC to get flushed before flushing outputs
+			wg.Wait()
+			a.flush()
+			return nil
+		case <-ticker.C:
+			internal.RandomSleep(a.Config.Agent.FlushJitter.Duration, shutdown)
+			a.flush()
+		case metric := <-metricC:
+			// NOTE potential bottleneck here as we put each metric through the
+			// processors serially.
+			mS := []telegraf.Metric{metric}
+			for _, processor := range a.Config.Processors {
+				mS = processor.Apply(mS...)
+			}
+			for _, m := range mS {
+				outMetricC <- m
+			}
+		}
+	}
+}
+
+// Run runs the agent daemon, gathering every Interval
+func (a *Agent) Run(shutdown chan struct{}) error {
+	var wg sync.WaitGroup
+
+	log.Printf("I! Agent Config: Interval:%s, Quiet:%#v, Hostname:%#v, "+
+		"Flush Interval:%s \n",
+		a.Config.Agent.Interval.Duration, a.Config.Agent.Quiet,
+		a.Config.Agent.Hostname, a.Config.Agent.FlushInterval.Duration)
+
+	// channel shared between all input threads for accumulating metrics
+	metricC := make(chan telegraf.Metric, 100)
+
+	// Start all ServicePlugins
+	for _, input := range a.Config.Inputs {
+		input.SetDefaultTags(a.Config.Tags)
+		switch p := input.Input.(type) {
+		case telegraf.ServiceInput:
+			acc := NewAccumulator(input, metricC)
+			// Service input plugins should set their own precision of their
+			// metrics.
+			acc.SetPrecision(time.Nanosecond, 0)
+			if err := p.Start(acc); err != nil {
+				log.Printf("E! Service for input %s failed to start, exiting\n%s\n",
+					input.Name(), err.Error())
+				return err
+			}
+			defer p.Stop()
+		}
+	}
+
+	// Round collection to nearest interval by sleeping
+	if a.Config.Agent.RoundInterval {
+		i := int64(a.Config.Agent.Interval.Duration)
+		time.Sleep(time.Duration(i - (time.Now().UnixNano() % i)))
+	}
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		if err := a.flusher(shutdown, metricC); err != nil {
+			log.Printf("E! Flusher routine failed, exiting: %s\n", err.Error())
+			close(shutdown)
+		}
+	}()
+
+	wg.Add(len(a.Config.Aggregators))
+	for _, aggregator := range a.Config.Aggregators {
+		go func(agg *models.RunningAggregator) {
+			defer wg.Done()
+			acc := NewAccumulator(agg, metricC)
+			acc.SetPrecision(a.Config.Agent.Precision.Duration,
+				a.Config.Agent.Interval.Duration)
+			agg.Run(acc, shutdown)
+		}(aggregator)
+	}
+
+	wg.Add(len(a.Config.Inputs))
+	for _, input := range a.Config.Inputs {
+		interval := a.Config.Agent.Interval.Duration
+		// overwrite global interval if this plugin has it's own.
+		if input.Config.Interval != 0 {
+			interval = input.Config.Interval
+		}
+		go func(in *models.RunningInput, interv time.Duration) {
+			defer wg.Done()
+			a.gatherer(shutdown, in, interv, metricC)
+		}(input, interval)
+	}
+
+	wg.Wait()
+	return nil
+}

agent/agent_test.go

@@ -0,0 +1,111 @@
+package agent
+
+import (
+	"testing"
+
+	"github.com/influxdata/telegraf/internal/config"
+
+	// needing to load the plugins
+	_ "github.com/influxdata/telegraf/plugins/inputs/all"
+	// needing to load the outputs
+	_ "github.com/influxdata/telegraf/plugins/outputs/all"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAgent_OmitHostname(t *testing.T) {
+	c := config.NewConfig()
+	c.Agent.OmitHostname = true
+	_, err := NewAgent(c)
+	assert.NoError(t, err)
+	assert.NotContains(t, c.Tags, "host")
+}
+
+func TestAgent_LoadPlugin(t *testing.T) {
+	c := config.NewConfig()
+	c.InputFilters = []string{"mysql"}
+	err := c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ := NewAgent(c)
+	assert.Equal(t, 1, len(a.Config.Inputs))
+
+	c = config.NewConfig()
+	c.InputFilters = []string{"foo"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 0, len(a.Config.Inputs))
+
+	c = config.NewConfig()
+	c.InputFilters = []string{"mysql", "foo"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 1, len(a.Config.Inputs))
+
+	c = config.NewConfig()
+	c.InputFilters = []string{"mysql", "redis"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 2, len(a.Config.Inputs))
+
+	c = config.NewConfig()
+	c.InputFilters = []string{"mysql", "foo", "redis", "bar"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 2, len(a.Config.Inputs))
+}
+
+func TestAgent_LoadOutput(t *testing.T) {
+	c := config.NewConfig()
+	c.OutputFilters = []string{"influxdb"}
+	err := c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ := NewAgent(c)
+	assert.Equal(t, 2, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{"kafka"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 1, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 3, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{"foo"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 0, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{"influxdb", "foo"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 2, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{"influxdb", "kafka"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	assert.Equal(t, 3, len(c.Outputs))
+	a, _ = NewAgent(c)
+	assert.Equal(t, 3, len(a.Config.Outputs))
+
+	c = config.NewConfig()
+	c.OutputFilters = []string{"influxdb", "foo", "kafka", "bar"}
+	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	assert.NoError(t, err)
+	a, _ = NewAgent(c)
+	assert.Equal(t, 3, len(a.Config.Outputs))
+}

agent_test.go

@@ -1,156 +0,0 @@
-package telegraf
-
-import (
-	"github.com/stretchr/testify/assert"
-	"testing"
-	"time"
-
-	"github.com/influxdb/telegraf/internal/config"
-
-	// needing to load the plugins
-	_ "github.com/influxdb/telegraf/plugins/all"
-	// needing to load the outputs
-	_ "github.com/influxdb/telegraf/outputs/all"
-)
-
-func TestAgent_LoadPlugin(t *testing.T) {
-	c := config.NewConfig()
-	c.PluginFilters = []string{"mysql"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ := NewAgent(c)
-	assert.Equal(t, 1, len(a.Config.Plugins))
-
-	c = config.NewConfig()
-	c.PluginFilters = []string{"foo"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 0, len(a.Config.Plugins))
-
-	c = config.NewConfig()
-	c.PluginFilters = []string{"mysql", "foo"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 1, len(a.Config.Plugins))
-
-	c = config.NewConfig()
-	c.PluginFilters = []string{"mysql", "redis"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 2, len(a.Config.Plugins))
-
-	c = config.NewConfig()
-	c.PluginFilters = []string{"mysql", "foo", "redis", "bar"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 2, len(a.Config.Plugins))
-}
-
-func TestAgent_LoadOutput(t *testing.T) {
-	c := config.NewConfig()
-	c.OutputFilters = []string{"influxdb"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ := NewAgent(c)
-	assert.Equal(t, 2, len(a.Config.Outputs))
-
-	c = config.NewConfig()
-	c.OutputFilters = []string{}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 3, len(a.Config.Outputs))
-
-	c = config.NewConfig()
-	c.OutputFilters = []string{"foo"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 0, len(a.Config.Outputs))
-
-	c = config.NewConfig()
-	c.OutputFilters = []string{"influxdb", "foo"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 2, len(a.Config.Outputs))
-
-	c = config.NewConfig()
-	c.OutputFilters = []string{"influxdb", "kafka"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 3, len(a.Config.Outputs))
-
-	c = config.NewConfig()
-	c.OutputFilters = []string{"influxdb", "foo", "kafka", "bar"}
-	c.LoadConfig("./internal/config/testdata/telegraf-agent.toml")
-	a, _ = NewAgent(c)
-	assert.Equal(t, 3, len(a.Config.Outputs))
-}
-
-func TestAgent_ZeroJitter(t *testing.T) {
-	flushinterval := jitterInterval(time.Duration(10*time.Second),
-		time.Duration(0*time.Second))
-
-	actual := flushinterval.Nanoseconds()
-	exp := time.Duration(10 * time.Second).Nanoseconds()
-
-	if actual != exp {
-		t.Errorf("Actual %v, expected %v", actual, exp)
-	}
-}
-
-func TestAgent_ZeroInterval(t *testing.T) {
-	min := time.Duration(500 * time.Millisecond).Nanoseconds()
-	max := time.Duration(5 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(0*time.Second),
-			time.Duration(5*time.Second))
-		actual := flushinterval.Nanoseconds()
-
-		if actual > max {
-			t.Errorf("Didn't expect interval %d to be > %d", actual, max)
-			break
-		}
-		if actual < min {
-			t.Errorf("Didn't expect interval %d to be < %d", actual, min)
-			break
-		}
-	}
-}
-
-func TestAgent_ZeroBoth(t *testing.T) {
-	flushinterval := jitterInterval(time.Duration(0*time.Second),
-		time.Duration(0*time.Second))
-
-	actual := flushinterval
-	exp := time.Duration(500 * time.Millisecond)
-
-	if actual != exp {
-		t.Errorf("Actual %v, expected %v", actual, exp)
-	}
-}
-
-func TestAgent_JitterMax(t *testing.T) {
-	max := time.Duration(32 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(30*time.Second),
-			time.Duration(2*time.Second))
-		actual := flushinterval.Nanoseconds()
-		if actual > max {
-			t.Errorf("Didn't expect interval %d to be > %d", actual, max)
-			break
-		}
-	}
-}
-
-func TestAgent_JitterMin(t *testing.T) {
-	min := time.Duration(30 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(30*time.Second),
-			time.Duration(2*time.Second))
-		actual := flushinterval.Nanoseconds()
-		if actual < min {
-			t.Errorf("Didn't expect interval %d to be < %d", actual, min)
-			break
-		}
-	}
-}

aggregator.go

@@ -0,0 +1,22 @@
+package telegraf
+
+// Aggregator is an interface for implementing an Aggregator plugin.
+// the RunningAggregator wraps this interface and guarantees that
+// Add, Push, and Reset can not be called concurrently, so locking is not
+// required when implementing an Aggregator plugin.
+type Aggregator interface {
+	// SampleConfig returns the default configuration of the Input.
+	SampleConfig() string
+
+	// Description returns a one-sentence description on the Input.
+	Description() string
+
+	// Add the metric to the aggregator.
+	Add(in Metric)
+
+	// Push pushes the current aggregates to the accumulator.
+	Push(acc Accumulator)
+
+	// Reset resets the aggregators caches and aggregates.
+	Reset()
+}

circle.yml

@@ -4,14 +4,12 @@ machine:
   post:
     - sudo service zookeeper stop
     - go version
-    - go version | grep 1.5.1 || sudo rm -rf /usr/local/go
-    - wget https://storage.googleapis.com/golang/go1.5.1.linux-amd64.tar.gz
-    - sudo tar -C /usr/local -xzf go1.5.1.linux-amd64.tar.gz
+    - go version | grep 1.7.4 || sudo rm -rf /usr/local/go
+    - wget https://storage.googleapis.com/golang/go1.7.4.linux-amd64.tar.gz
+    - sudo tar -C /usr/local -xzf go1.7.4.linux-amd64.tar.gz
     - go version
 
 dependencies:
-  cache_directories:
-    - "~/telegraf-build/src"
   override:
     - docker info
 

cmd/telegraf/telegraf.go

@@ -6,147 +6,339 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"runtime"
 	"strings"
+	"syscall"
 
-	"github.com/influxdb/telegraf"
-	"github.com/influxdb/telegraf/internal/config"
-	_ "github.com/influxdb/telegraf/outputs/all"
-	_ "github.com/influxdb/telegraf/plugins/all"
+	"github.com/influxdata/telegraf/agent"
+	"github.com/influxdata/telegraf/internal/config"
+	"github.com/influxdata/telegraf/logger"
+	_ "github.com/influxdata/telegraf/plugins/aggregators/all"
+	"github.com/influxdata/telegraf/plugins/inputs"
+	_ "github.com/influxdata/telegraf/plugins/inputs/all"
+	"github.com/influxdata/telegraf/plugins/outputs"
+	_ "github.com/influxdata/telegraf/plugins/outputs/all"
+	_ "github.com/influxdata/telegraf/plugins/processors/all"
+	"github.com/kardianos/service"
 )
 
 var fDebug = flag.Bool("debug", false,
-	"show metrics as they're generated to stdout")
+	"turn on debug logging")
+var fQuiet = flag.Bool("quiet", false,
+	"run in quiet mode")
 var fTest = flag.Bool("test", false, "gather metrics, print them out, and exit")
 var fConfig = flag.String("config", "", "configuration file to load")
-var fConfigDirectory = flag.String("configdirectory", "",
+var fConfigDirectory = flag.String("config-directory", "",
 	"directory containing additional *.conf files")
 var fVersion = flag.Bool("version", false, "display the version")
 var fSampleConfig = flag.Bool("sample-config", false,
 	"print out full sample configuration")
 var fPidfile = flag.String("pidfile", "", "file to write our pid to")
-var fPLuginFilters = flag.String("filter", "",
-	"filter the plugins to enable, separator is :")
-var fOutputFilters = flag.String("outputfilter", "",
+var fInputFilters = flag.String("input-filter", "",
+	"filter the inputs to enable, separator is :")
+var fInputList = flag.Bool("input-list", false,
+	"print available input plugins.")
+var fOutputFilters = flag.String("output-filter", "",
 	"filter the outputs to enable, separator is :")
+var fOutputList = flag.Bool("output-list", false,
+	"print available output plugins.")
+var fAggregatorFilters = flag.String("aggregator-filter", "",
+	"filter the aggregators to enable, separator is :")
+var fProcessorFilters = flag.String("processor-filter", "",
+	"filter the processors to enable, separator is :")
 var fUsage = flag.String("usage", "",
 	"print usage for a plugin, ie, 'telegraf -usage mysql'")
+var fService = flag.String("service", "",
+	"operate on the service")
 
-// Telegraf version
-//	-ldflags "-X main.Version=`git describe --always --tags`"
-var Version string
+// Telegraf version, populated linker.
+//   ie, -ldflags "-X main.version=`git describe --always --tags`"
+var (
+	version string
+	commit  string
+	branch  string
+)
 
-func main() {
-	flag.Parse()
-
-	var pluginFilters []string
-	if *fPLuginFilters != "" {
-		pluginsFilter := strings.TrimSpace(*fPLuginFilters)
-		pluginFilters = strings.Split(":"+pluginsFilter+":", ":")
+func init() {
+	// If commit or branch are not set, make that clear.
+	if commit == "" {
+		commit = "unknown"
 	}
-
-	var outputFilters []string
-	if *fOutputFilters != "" {
-		outputFilter := strings.TrimSpace(*fOutputFilters)
-		outputFilters = strings.Split(":"+outputFilter+":", ":")
+	if branch == "" {
+		branch = "unknown"
 	}
+}
 
-	if *fVersion {
-		v := fmt.Sprintf("Telegraf - Version %s", Version)
-		fmt.Println(v)
+const usage = `Telegraf, The plugin-driven server agent for collecting and reporting metrics.
+
+Usage:
+
+  telegraf [commands|flags]
+
+The commands & flags are:
+
+  config             print out full sample configuration to stdout
+  version            print the version to stdout
+
+  --config <file>     configuration file to load
+  --test              gather metrics once, print them to stdout, and exit
+  --config-directory  directory containing additional *.conf files
+  --input-filter      filter the input plugins to enable, separator is :
+  --output-filter     filter the output plugins to enable, separator is :
+  --usage             print usage for a plugin, ie, 'telegraf --usage mysql'
+  --debug             print metrics as they're generated to stdout
+  --quiet             run in quiet mode
+
+Examples:
+
+  # generate a telegraf config file:
+  telegraf config > telegraf.conf
+
+  # generate config with only cpu input & influxdb output plugins defined
+  telegraf --input-filter cpu --output-filter influxdb config
+
+  # run a single telegraf collection, outputing metrics to stdout
+  telegraf --config telegraf.conf -test
+
+  # run telegraf with all plugins defined in config file
+  telegraf --config telegraf.conf
+
+  # run telegraf, enabling the cpu & memory input, and influxdb output plugins
+  telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
+`
+
+var stop chan struct{}
+
+var srvc service.Service
+
+type program struct{}
+
+func reloadLoop(stop chan struct{}, s service.Service) {
+	defer func() {
+		if service.Interactive() {
+			os.Exit(0)
+		}
 		return
-	}
+	}()
+	reload := make(chan bool, 1)
+	reload <- true
+	for <-reload {
+		reload <- false
+		flag.Parse()
+		args := flag.Args()
 
-	if *fSampleConfig {
-		config.PrintSampleConfig(pluginFilters, outputFilters)
-		return
-	}
+		var inputFilters []string
+		if *fInputFilters != "" {
+			inputFilter := strings.TrimSpace(*fInputFilters)
+			inputFilters = strings.Split(":"+inputFilter+":", ":")
+		}
+		var outputFilters []string
+		if *fOutputFilters != "" {
+			outputFilter := strings.TrimSpace(*fOutputFilters)
+			outputFilters = strings.Split(":"+outputFilter+":", ":")
+		}
+		var aggregatorFilters []string
+		if *fAggregatorFilters != "" {
+			aggregatorFilter := strings.TrimSpace(*fAggregatorFilters)
+			aggregatorFilters = strings.Split(":"+aggregatorFilter+":", ":")
+		}
+		var processorFilters []string
+		if *fProcessorFilters != "" {
+			processorFilter := strings.TrimSpace(*fProcessorFilters)
+			processorFilters = strings.Split(":"+processorFilter+":", ":")
+		}
 
-	if *fUsage != "" {
-		if err := config.PrintPluginConfig(*fUsage); err != nil {
-			if err2 := config.PrintOutputConfig(*fUsage); err2 != nil {
-				log.Fatalf("%s and %s", err, err2)
+		if len(args) > 0 {
+			switch args[0] {
+			case "version":
+				fmt.Printf("Telegraf v%s (git: %s %s)\n", version, branch, commit)
+				return
+			case "config":
+				config.PrintSampleConfig(
+					inputFilters,
+					outputFilters,
+					aggregatorFilters,
+					processorFilters,
+				)
+				return
 			}
 		}
-		return
-	}
 
-	var (
-		c   *config.Config
-		err error
-	)
+		// switch for flags which just do something and exit immediately
+		switch {
+		case *fOutputList:
+			fmt.Println("Available Output Plugins:")
+			for k, _ := range outputs.Outputs {
+				fmt.Printf("  %s\n", k)
+			}
+			return
+		case *fInputList:
+			fmt.Println("Available Input Plugins:")
+			for k, _ := range inputs.Inputs {
+				fmt.Printf("  %s\n", k)
+			}
+			return
+		case *fVersion:
+			fmt.Printf("Telegraf v%s (git: %s %s)\n", version, branch, commit)
+			return
+		case *fSampleConfig:
+			config.PrintSampleConfig(
+				inputFilters,
+				outputFilters,
+				aggregatorFilters,
+				processorFilters,
+			)
+			return
+		case *fUsage != "":
+			if err := config.PrintInputConfig(*fUsage); err != nil {
+				if err2 := config.PrintOutputConfig(*fUsage); err2 != nil {
+					log.Fatalf("E! %s and %s", err, err2)
+				}
+			}
+			return
+		}
 
-	if *fConfig != "" {
-		c = config.NewConfig()
+		// If no other options are specified, load the config file and run.
+		c := config.NewConfig()
 		c.OutputFilters = outputFilters
-		c.PluginFilters = pluginFilters
-		err = c.LoadConfig(*fConfig)
+		c.InputFilters = inputFilters
+		err := c.LoadConfig(*fConfig)
 		if err != nil {
-			log.Fatal(err)
+			log.Fatal("E! " + err.Error())
+		}
+
+		if *fConfigDirectory != "" {
+			err = c.LoadDirectory(*fConfigDirectory)
+			if err != nil {
+				log.Fatal("E! " + err.Error())
+			}
+		}
+		if len(c.Outputs) == 0 {
+			log.Fatalf("E! Error: no outputs found, did you provide a valid config file?")
+		}
+		if len(c.Inputs) == 0 {
+			log.Fatalf("E! Error: no inputs found, did you provide a valid config file?")
+		}
+
+		ag, err := agent.NewAgent(c)
+		if err != nil {
+			log.Fatal("E! " + err.Error())
+		}
+
+		// Setup logging
+		logger.SetupLogging(
+			ag.Config.Agent.Debug || *fDebug,
+			ag.Config.Agent.Quiet || *fQuiet,
+			ag.Config.Agent.Logfile,
+		)
+
+		if *fTest {
+			err = ag.Test()
+			if err != nil {
+				log.Fatal("E! " + err.Error())
+			}
+			return
+		}
+
+		err = ag.Connect()
+		if err != nil {
+			log.Fatal("E! " + err.Error())
+		}
+
+		shutdown := make(chan struct{})
+		signals := make(chan os.Signal)
+		signal.Notify(signals, os.Interrupt, syscall.SIGHUP)
+		go func() {
+			select {
+			case sig := <-signals:
+				if sig == os.Interrupt {
+					close(shutdown)
+				}
+				if sig == syscall.SIGHUP {
+					log.Printf("I! Reloading Telegraf config\n")
+					<-reload
+					reload <- true
+					close(shutdown)
+				}
+			case <-stop:
+				close(shutdown)
+			}
+		}()
+
+		log.Printf("I! Starting Telegraf (version %s)\n", version)
+		log.Printf("I! Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
+		log.Printf("I! Loaded inputs: %s", strings.Join(c.InputNames(), " "))
+		log.Printf("I! Tags enabled: %s", c.ListTags())
+
+		if *fPidfile != "" {
+			f, err := os.Create(*fPidfile)
+			if err != nil {
+				log.Fatalf("E! Unable to create pidfile: %s", err)
+			}
+
+			fmt.Fprintf(f, "%d\n", os.Getpid())
+
+			f.Close()
+		}
+
+		ag.Run(shutdown)
+	}
+}
+
+func usageExit(rc int) {
+	fmt.Println(usage)
+	os.Exit(rc)
+}
+
+func (p *program) Start(s service.Service) error {
+	srvc = s
+	go p.run()
+	return nil
+}
+func (p *program) run() {
+	stop = make(chan struct{})
+	reloadLoop(stop, srvc)
+}
+func (p *program) Stop(s service.Service) error {
+	close(stop)
+	return nil
+}
+
+func main() {
+	flag.Usage = func() { usageExit(0) }
+	flag.Parse()
+	if runtime.GOOS == "windows" {
+		svcConfig := &service.Config{
+			Name:        "telegraf",
+			DisplayName: "Telegraf Data Collector Service",
+			Description: "Collects data using a series of plugins and publishes it to" +
+				"another series of plugins.",
+			Arguments: []string{"-config", "C:\\Program Files\\Telegraf\\telegraf.conf"},
+		}
+
+		prg := &program{}
+		s, err := service.New(prg, svcConfig)
+		if err != nil {
+			log.Fatal("E! " + err.Error())
+		}
+		// Handle the -service flag here to prevent any issues with tooling that
+		// may not have an interactive session, e.g. installing from Ansible.
+		if *fService != "" {
+			if *fConfig != "" {
+				(*svcConfig).Arguments = []string{"-config", *fConfig}
+			}
+			err := service.Control(s, *fService)
+			if err != nil {
+				log.Fatal("E! " + err.Error())
+			}
+		} else {
+			err = s.Run()
+			if err != nil {
+				log.Println("E! " + err.Error())
+			}
 		}
 	} else {
-		fmt.Println("Usage: Telegraf")
-		flag.PrintDefaults()
-		return
+		stop = make(chan struct{})
+		reloadLoop(stop, nil)
 	}
-
-	if *fConfigDirectory != "" {
-		err = c.LoadDirectory(*fConfigDirectory)
-		if err != nil {
-			log.Fatal(err)
-		}
-	}
-	if len(c.Outputs) == 0 {
-		log.Fatalf("Error: no outputs found, did you provide a valid config file?")
-	}
-	if len(c.Plugins) == 0 {
-		log.Fatalf("Error: no plugins found, did you provide a valid config file?")
-	}
-
-	ag, err := telegraf.NewAgent(c)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	if *fDebug {
-		ag.Config.Agent.Debug = true
-	}
-
-	if *fTest {
-		err = ag.Test()
-		if err != nil {
-			log.Fatal(err)
-		}
-		return
-	}
-
-	err = ag.Connect()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	shutdown := make(chan struct{})
-	signals := make(chan os.Signal)
-	signal.Notify(signals, os.Interrupt)
-	go func() {
-		<-signals
-		close(shutdown)
-	}()
-
-	log.Printf("Starting Telegraf (version %s)\n", Version)
-	log.Printf("Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
-	log.Printf("Loaded plugins: %s", strings.Join(c.PluginNames(), " "))
-	log.Printf("Tags enabled: %s", c.ListTags())
-
-	if *fPidfile != "" {
-		f, err := os.Create(*fPidfile)
-		if err != nil {
-			log.Fatalf("Unable to create pidfile: %s", err)
-		}
-
-		fmt.Fprintf(f, "%d\n", os.Getpid())
-
-		f.Close()
-	}
-
-	ag.Run(shutdown)
 }

docs/AGGREGATORS_AND_PROCESSORS.md

@@ -0,0 +1,59 @@
+# Telegraf Aggregator & Processor Plugins
+
+As of release 1.1.0, Telegraf has the concept of Aggregator and Processor Plugins.
+
+These plugins sit in-between Input & Output plugins, aggregating and processing
+metrics as they pass through Telegraf:
+
+```
+┌───────────┐
+│           │
+│    CPU    │───┐
+│           │   │
+└───────────┘   │
+                │
+┌───────────┐   │                                              ┌───────────┐
+│           │   │                                              │           │
+│  Memory   │───┤                                          ┌──▶│ InfluxDB  │
+│           │   │                                          │   │           │
+└───────────┘   │    ┌─────────────┐     ┌─────────────┐   │   └───────────┘
+                │    │             │     │Aggregate    │   │
+┌───────────┐   │    │Process      │     │ - mean      │   │   ┌───────────┐
+│           │   │    │ - transform │     │ - quantiles │   │   │           │
+│   MySQL   │───┼───▶│ - decorate  │────▶│ - min/max   │───┼──▶│   File    │
+│           │   │    │ - filter    │     │ - count     │   │   │           │
+└───────────┘   │    │             │     │             │   │   └───────────┘
+                │    └─────────────┘     └─────────────┘   │
+┌───────────┐   │                                          │   ┌───────────┐
+│           │   │                                          │   │           │
+│   SNMP    │───┤                                          └──▶│   Kafka   │
+│           │   │                                              │           │
+└───────────┘   │                                              └───────────┘
+                │
+┌───────────┐   │
+│           │   │
+│  Docker   │───┘
+│           │
+└───────────┘
+```
+
+Both Aggregators and Processors analyze metrics as they pass through Telegraf.
+
+**Processor** plugins process metrics as they pass through and immediately emit
+results based on the values they process. For example, this could be printing
+all metrics or adding a tag to all metrics that pass through.
+
+**Aggregator** plugins, on the other hand, are a bit more complicated. Aggregators
+are typically for emitting new _aggregate_ metrics, such as a running mean,
+minimum, maximum, quantiles, or standard deviation. For this reason, all _aggregator_
+plugins are configured with a `period`. The `period` is the size of the window
+of metrics that each _aggregate_ represents. In other words, the emitted
+_aggregate_ metric will be the aggregated value of the past `period` seconds.
+Since many users will only care about their aggregates and not every single metric
+gathered, there is also a `drop_original` argument, which tells Telegraf to only
+emit the aggregates and not the original metrics.
+
+**NOTE** That since aggregators only aggregate metrics within their period, that
+historical data is not supported. In other words, if your metric timestamp is more
+than `now() - period` in the past, it will not be aggregated. If this is a feature
+that you need, please comment on this [github issue](https://github.com/influxdata/telegraf/issues/1992)

docs/CONFIGURATION.md

@@ -0,0 +1,354 @@
+# Telegraf Configuration
+
+You can see the latest config file with all available plugins here:
+[telegraf.conf](https://github.com/influxdata/telegraf/blob/master/etc/telegraf.conf)
+
+## Generating a Configuration File
+
+A default Telegraf config file can be auto-generated by telegraf:
+
+```
+telegraf config > telegraf.conf
+```
+
+To generate a file with specific inputs and outputs, you can use the
+--input-filter and --output-filter flags:
+
+```
+telegraf --input-filter cpu:mem:net:swap --output-filter influxdb:kafka config
+```
+
+## Environment Variables
+
+Environment variables can be used anywhere in the config file, simply prepend
+them with $. For strings the variable must be within quotes (ie, "$STR_VAR"),
+for numbers and booleans they should be plain (ie, $INT_VAR, $BOOL_VAR)
+
+# Global Tags
+
+Global tags can be specified in the `[global_tags]` section of the config file
+in key="value" format. All metrics being gathered on this host will be tagged
+with the tags specified here.
+
+## Agent Configuration
+
+Telegraf has a few options you can configure under the `[agent]` section of the
+config.
+
+* **interval**: Default data collection interval for all inputs
+* **round_interval**: Rounds collection interval to 'interval'
+ie, if interval="10s" then always collect on :00, :10, :20, etc.
+* **metric_batch_size**: Telegraf will send metrics to output in batch of at
+most metric_batch_size metrics.
+* **metric_buffer_limit**: Telegraf will cache metric_buffer_limit metrics
+for each output, and will flush this buffer on a successful write.
+This should be a multiple of metric_batch_size and could not be less
+than 2 times metric_batch_size.
+* **collection_jitter**: Collection jitter is used to jitter
+the collection by a random amount.
+Each plugin will sleep for a random time within jitter before collecting.
+This can be used to avoid many plugins querying things like sysfs at the
+same time, which can have a measurable effect on the system.
+* **flush_interval**: Default data flushing interval for all outputs.
+You should not set this below
+interval. Maximum flush_interval will be flush_interval + flush_jitter
+* **flush_jitter**: Jitter the flush interval by a random amount.
+This is primarily to avoid
+large write spikes for users running a large number of telegraf instances.
+ie, a jitter of 5s and flush_interval 10s means flushes will happen every 10-15s.
+* **precision**: By default, precision will be set to the same timestamp order
+as the collection interval, with the maximum being 1s. Precision will NOT
+be used for service inputs, such as logparser and statsd. Valid values are
+"ns", "us" (or "µs"), "ms", "s".
+* **logfile**: Specify the log file name. The empty string means to log to stdout.
+* **debug**: Run telegraf in debug mode.
+* **quiet**: Run telegraf in quiet mode (error messages only).
+* **hostname**: Override default hostname, if empty use os.Hostname().
+* **omit_hostname**: If true, do no set the "host" tag in the telegraf agent.
+
+## Input Configuration
+
+The following config parameters are available for all inputs:
+
+* **interval**: How often to gather this metric. Normal plugins use a single
+global interval, but if one particular input should be run less or more often,
+you can configure that here.
+* **name_override**: Override the base name of the measurement.
+(Default is the name of the input).
+* **name_prefix**: Specifies a prefix to attach to the measurement name.
+* **name_suffix**: Specifies a suffix to attach to the measurement name.
+* **tags**: A map of tags to apply to a specific input's measurements.
+
+## Output Configuration
+
+There are no generic configuration options available for all outputs.
+
+## Aggregator Configuration
+
+The following config parameters are available for all aggregators:
+
+* **period**: The period on which to flush & clear each aggregator. All metrics
+that are sent with timestamps outside of this period will be ignored by the
+aggregator.
+* **delay**: The delay before each aggregator is flushed. This is to control
+how long for aggregators to wait before receiving metrics from input plugins,
+in the case that aggregators are flushing and inputs are gathering on the
+same interval.
+* **drop_original**: If true, the original metric will be dropped by the
+aggregator and will not get sent to the output plugins.
+* **name_override**: Override the base name of the measurement.
+(Default is the name of the input).
+* **name_prefix**: Specifies a prefix to attach to the measurement name.
+* **name_suffix**: Specifies a suffix to attach to the measurement name.
+* **tags**: A map of tags to apply to a specific input's measurements.
+
+## Processor Configuration
+
+The following config parameters are available for all processors:
+
+* **order**: This is the order in which the processor(s) get executed. If this
+is not specified then processor execution order will be random.
+
+#### Measurement Filtering
+
+Filters can be configured per input, output, processor, or aggregator,
+see below for examples.
+
+* **namepass**: An array of strings that is used to filter metrics generated by the
+current input. Each string in the array is tested as a glob match against
+measurement names and if it matches, the field is emitted.
+* **namedrop**: The inverse of pass, if a measurement name matches, it is not emitted.
+* **fieldpass**: An array of strings that is used to filter metrics generated by the
+current input. Each string in the array is tested as a glob match against field names
+and if it matches, the field is emitted. fieldpass is not available for outputs.
+* **fielddrop**: The inverse of pass, if a field name matches, it is not emitted.
+fielddrop is not available for outputs.
+* **tagpass**: tag names and arrays of strings that are used to filter
+measurements by the current input. Each string in the array is tested as a glob
+match against the tag name, and if it matches the measurement is emitted.
+* **tagdrop**: The inverse of tagpass. If a tag matches, the measurement is not
+emitted. This is tested on measurements that have passed the tagpass test.
+* **tagexclude**: tagexclude can be used to exclude a tag from measurement(s).
+As opposed to tagdrop, which will drop an entire measurement based on it's
+tags, tagexclude simply strips the given tag keys from the measurement. This
+can be used on inputs & outputs, but it is _recommended_ to be used on inputs,
+as it is more efficient to filter out tags at the ingestion point.
+* **taginclude**: taginclude is the inverse of tagexclude. It will only include
+the tag keys in the final measurement.
+
+**NOTE** `tagpass` and `tagdrop` parameters must be defined at the _end_ of
+the plugin definition, otherwise subsequent plugin config options will be
+interpreted as part of the tagpass/tagdrop map.
+
+#### Input Configuration Examples
+
+This is a full working config that will output CPU data to an InfluxDB instance
+at 192.168.59.103:8086, tagging measurements with dc="denver-1". It will output
+measurements at a 10s interval and will collect per-cpu data, dropping any
+fields which begin with `time_`.
+
+```toml
+[global_tags]
+  dc = "denver-1"
+
+[agent]
+  interval = "10s"
+
+# OUTPUTS
+[[outputs.influxdb]]
+  url = "http://192.168.59.103:8086" # required.
+  database = "telegraf" # required.
+  precision = "s"
+
+# INPUTS
+[[inputs.cpu]]
+  percpu = true
+  totalcpu = false
+  # filter all fields beginning with 'time_'
+  fielddrop = ["time_*"]
+```
+
+#### Input Config: tagpass and tagdrop
+
+**NOTE** `tagpass` and `tagdrop` parameters must be defined at the _end_ of
+the plugin definition, otherwise subsequent plugin config options will be
+interpreted as part of the tagpass/tagdrop map.
+
+```toml
+[[inputs.cpu]]
+  percpu = true
+  totalcpu = false
+  fielddrop = ["cpu_time"]
+  # Don't collect CPU data for cpu6 & cpu7
+  [inputs.cpu.tagdrop]
+    cpu = [ "cpu6", "cpu7" ]
+
+[[inputs.disk]]
+  [inputs.disk.tagpass]
+    # tagpass conditions are OR, not AND.
+    # If the (filesystem is ext4 or xfs) OR (the path is /opt or /home)
+    # then the metric passes
+    fstype = [ "ext4", "xfs" ]
+    # Globs can also be used on the tag values
+    path = [ "/opt", "/home*" ]
+```
+
+#### Input Config: fieldpass and fielddrop
+
+```toml
+# Drop all metrics for guest & steal CPU usage
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+  fielddrop = ["usage_guest", "usage_steal"]
+
+# Only store inode related metrics for disks
+[[inputs.disk]]
+  fieldpass = ["inodes*"]
+```
+
+#### Input Config: namepass and namedrop
+
+```toml
+# Drop all metrics about containers for kubelet
+[[inputs.prometheus]]
+  urls = ["http://kube-node-1:4194/metrics"]
+  namedrop = ["container_*"]
+
+# Only store rest client related metrics for kubelet
+[[inputs.prometheus]]
+  urls = ["http://kube-node-1:4194/metrics"]
+  namepass = ["rest_client_*"]
+```
+
+#### Input Config: taginclude and tagexclude
+
+```toml
+# Only include the "cpu" tag in the measurements for the cpu plugin.
+[[inputs.cpu]]
+  percpu = true
+  totalcpu = true
+  taginclude = ["cpu"]
+
+# Exclude the "fstype" tag from the measurements for the disk plugin.
+[[inputs.disk]]
+  tagexclude = ["fstype"]
+```
+
+#### Input config: prefix, suffix, and override
+
+This plugin will emit measurements with the name `cpu_total`
+
+```toml
+[[inputs.cpu]]
+  name_suffix = "_total"
+  percpu = false
+  totalcpu = true
+```
+
+This will emit measurements with the name `foobar`
+
+```toml
+[[inputs.cpu]]
+  name_override = "foobar"
+  percpu = false
+  totalcpu = true
+```
+
+#### Input config: tags
+
+This plugin will emit measurements with two additional tags: `tag1=foo` and
+`tag2=bar`
+
+NOTE: Order matters, the `[inputs.cpu.tags]` table must be at the _end_ of the
+plugin definition.
+
+```toml
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+  [inputs.cpu.tags]
+    tag1 = "foo"
+    tag2 = "bar"
+```
+
+#### Multiple inputs of the same type
+
+Additional inputs (or outputs) of the same type can be specified,
+just define more instances in the config file. It is highly recommended that
+you utilize `name_override`, `name_prefix`, or `name_suffix` config options
+to avoid measurement collisions:
+
+```toml
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+
+[[inputs.cpu]]
+  percpu = true
+  totalcpu = false
+  name_override = "percpu_usage"
+  fielddrop = ["cpu_time*"]
+```
+
+#### Output Configuration Examples:
+
+```toml
+[[outputs.influxdb]]
+  urls = [ "http://localhost:8086" ]
+  database = "telegraf"
+  precision = "s"
+  # Drop all measurements that start with "aerospike"
+  namedrop = ["aerospike*"]
+
+[[outputs.influxdb]]
+  urls = [ "http://localhost:8086" ]
+  database = "telegraf-aerospike-data"
+  precision = "s"
+  # Only accept aerospike data:
+  namepass = ["aerospike*"]
+
+[[outputs.influxdb]]
+  urls = [ "http://localhost:8086" ]
+  database = "telegraf-cpu0-data"
+  precision = "s"
+  # Only store measurements where the tag "cpu" matches the value "cpu0"
+  [outputs.influxdb.tagpass]
+    cpu = ["cpu0"]
+```
+
+#### Aggregator Configuration Examples:
+
+This will collect and emit the min/max of the system load1 metric every
+30s, dropping the originals.
+
+```toml
+[[inputs.system]]
+  fieldpass = ["load1"] # collects system load1 metric.
+
+[[aggregators.minmax]]
+  period = "30s"        # send & clear the aggregate every 30s.
+  drop_original = true  # drop the original metrics.
+
+[[outputs.file]]
+  files = ["stdout"]
+```
+
+This will collect and emit the min/max of the swap metrics every
+30s, dropping the originals. The aggregator will not be applied
+to the system load metrics due to the `namepass` parameter.
+
+```toml
+[[inputs.swap]]
+
+[[inputs.system]]
+  fieldpass = ["load1"] # collects system load1 metric.
+
+[[aggregators.minmax]]
+  period = "30s"        # send & clear the aggregate every 30s.
+  drop_original = true  # drop the original metrics.
+  namepass = ["swap"]   # only "pass" swap metrics through the aggregator.
+
+[[outputs.file]]
+  files = ["stdout"]
+```

docs/DATA_FORMATS_INPUT.md

@@ -0,0 +1,440 @@
+# Telegraf Input Data Formats
+
+Telegraf is able to parse the following input data formats into metrics:
+
+1. [InfluxDB Line Protocol](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#influx)
+1. [JSON](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#json)
+1. [Graphite](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#graphite)
+1. [Value](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#value), ie: 45 or "booyah"
+1. [Nagios](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#nagios) (exec input only)
+
+Telegraf metrics, like InfluxDB
+[points](https://docs.influxdata.com/influxdb/v0.10/write_protocols/line/),
+are a combination of four basic parts:
+
+1. Measurement Name
+1. Tags
+1. Fields
+1. Timestamp
+
+These four parts are easily defined when using InfluxDB line-protocol as a
+data format. But there are other data formats that users may want to use which
+require more advanced configuration to create usable Telegraf metrics.
+
+Plugins such as `exec` and `kafka_consumer` parse textual data. Up until now,
+these plugins were statically configured to parse just a single
+data format. `exec` mostly only supported parsing JSON, and `kafka_consumer` only
+supported data in InfluxDB line-protocol.
+
+But now we are normalizing the parsing of various data formats across all
+plugins that can support it. You will be able to identify a plugin that supports
+different data formats by the presence of a `data_format` config option, for
+example, in the exec plugin:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/tmp/test.sh", "/usr/bin/mycollector --foo=bar"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "json"
+
+  ## Additional configuration options go here
+```
+
+Each data_format has an additional set of configuration options available, which
+I'll go over below.
+
+# Influx:
+
+There are no additional configuration options for InfluxDB line-protocol. The
+metrics are parsed directly into Telegraf metrics.
+
+#### Influx Configuration:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/tmp/test.sh", "/usr/bin/mycollector --foo=bar"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "influx"
+```
+
+# JSON:
+
+The JSON data format flattens JSON into metric _fields_.
+NOTE: Only numerical values are converted to fields, and they are converted
+into a float. strings are ignored unless specified as a tag_key (see below).
+
+So for example, this JSON:
+
+```json
+{
+    "a": 5,
+    "b": {
+        "c": 6
+    },
+    "ignored": "I'm a string"
+}
+```
+
+Would get translated into _fields_ of a measurement:
+
+```
+myjsonmetric a=5,b_c=6
+```
+
+The _measurement_ _name_ is usually the name of the plugin,
+but can be overridden using the `name_override` config option.
+
+#### JSON Configuration:
+
+The JSON data format supports specifying "tag keys". If specified, keys
+will be searched for in the root-level of the JSON blob. If the key(s) exist,
+they will be applied as tags to the Telegraf metrics.
+
+For example, if you had this configuration:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/tmp/test.sh", "/usr/bin/mycollector --foo=bar"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "json"
+
+  ## List of tag names to extract from top-level of JSON server response
+  tag_keys = [
+    "my_tag_1",
+    "my_tag_2"
+  ]
+```
+
+with this JSON output from a command:
+
+```json
+{
+    "a": 5,
+    "b": {
+        "c": 6
+    },
+    "my_tag_1": "foo"
+}
+```
+
+Your Telegraf metrics would get tagged with "my_tag_1"
+
+```
+exec_mycollector,my_tag_1=foo a=5,b_c=6
+```
+
+If the JSON data is an array, then each element of the array is parsed with the configured settings.
+Each resulting metric will be output with the same timestamp.
+
+For example, if the following configuration:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/usr/bin/mycollector --foo=bar"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "json"
+
+  ## List of tag names to extract from top-level of JSON server response
+  tag_keys = [
+    "my_tag_1",
+    "my_tag_2"
+  ]
+```
+
+with this JSON output from a command:
+
+```json
+[
+    {
+        "a": 5,
+        "b": {
+            "c": 6
+        },
+        "my_tag_1": "foo",
+        "my_tag_2": "baz"
+    },
+    {
+        "a": 7,
+        "b": {
+            "c": 8
+        },
+        "my_tag_1": "bar",
+        "my_tag_2": "baz"
+    }
+]
+```
+
+Your Telegraf metrics would get tagged with "my_tag_1" and "my_tag_2"
+
+```
+exec_mycollector,my_tag_1=foo,my_tag_2=baz a=5,b_c=6
+exec_mycollector,my_tag_1=bar,my_tag_2=baz a=7,b_c=8
+```
+
+# Value:
+
+The "value" data format translates single values into Telegraf metrics. This
+is done by assigning a measurement name and setting a single field ("value")
+as the parsed metric.
+
+#### Value Configuration:
+
+You **must** tell Telegraf what type of metric to collect by using the
+`data_type` configuration option. Available options are:
+
+1. integer
+2. float or long
+3. string
+4. boolean
+
+**Note:** It is also recommended that you set `name_override` to a measurement
+name that makes sense for your metric, otherwise it will just be set to the
+name of the plugin.
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["cat /proc/sys/kernel/random/entropy_avail"]
+
+  ## override the default metric name of "exec"
+  name_override = "entropy_available"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "value"
+  data_type = "integer" # required
+```
+
+# Graphite:
+
+The Graphite data format translates graphite _dot_ buckets directly into
+telegraf measurement names, with a single value field, and without any tags.
+By default, the separator is left as ".", but this can be changed using the
+"separator" argument. For more advanced options,
+Telegraf supports specifying "templates" to translate
+graphite buckets into Telegraf metrics.
+
+Templates are of the form:
+
+```
+"host.mytag.mytag.measurement.measurement.field*"
+```
+
+Where the following keywords exist:
+
+1. `measurement`: specifies that this section of the graphite bucket corresponds
+to the measurement name. This can be specified multiple times.
+2. `field`: specifies that this section of the graphite bucket corresponds
+to the field name. This can be specified multiple times.
+3. `measurement*`: specifies that all remaining elements of the graphite bucket
+correspond to the measurement name.
+4. `field*`: specifies that all remaining elements of the graphite bucket
+correspond to the field name.
+
+Any part of the template that is not a keyword is treated as a tag key. This
+can also be specified multiple times.
+
+NOTE: `field*` cannot be used in conjunction with `measurement*`!
+
+#### Measurement & Tag Templates:
+
+The most basic template is to specify a single transformation to apply to all
+incoming metrics. So the following template:
+
+```toml
+templates = [
+    "region.region.measurement*"
+]
+```
+
+would result in the following Graphite -> Telegraf transformation.
+
+```
+us.west.cpu.load 100
+=> cpu.load,region=us.west value=100
+```
+
+Multiple templates can also be specified, but these should be differentiated
+using _filters_ (see below for more details)
+
+```toml
+templates = [
+    "*.*.* region.region.measurement", # <- all 3-part measurements will match this one.
+    "*.*.*.* region.region.host.measurement", # <- all 4-part measurements will match this one.
+]
+```
+
+#### Field Templates:
+
+The field keyword tells Telegraf to give the metric that field name.
+So the following template:
+
+```toml
+separator = "_"
+templates = [
+    "measurement.measurement.field.field.region"
+]
+```
+
+would result in the following Graphite -> Telegraf transformation.
+
+```
+cpu.usage.idle.percent.eu-east 100
+=> cpu_usage,region=eu-east idle_percent=100
+```
+
+The field key can also be derived from all remaining elements of the graphite
+bucket by specifying `field*`:
+
+```toml
+separator = "_"
+templates = [
+    "measurement.measurement.region.field*"
+]
+```
+
+which would result in the following Graphite -> Telegraf transformation.
+
+```
+cpu.usage.eu-east.idle.percentage 100
+=> cpu_usage,region=eu-east idle_percentage=100
+```
+
+#### Filter Templates:
+
+Users can also filter the template(s) to use based on the name of the bucket,
+using glob matching, like so:
+
+```toml
+templates = [
+    "cpu.* measurement.measurement.region",
+    "mem.* measurement.measurement.host"
+]
+```
+
+which would result in the following transformation:
+
+```
+cpu.load.eu-east 100
+=> cpu_load,region=eu-east value=100
+
+mem.cached.localhost 256
+=> mem_cached,host=localhost value=256
+```
+
+#### Adding Tags:
+
+Additional tags can be added to a metric that don't exist on the received metric.
+You can add additional tags by specifying them after the pattern.
+Tags have the same format as the line protocol.
+Multiple tags are separated by commas.
+
+```toml
+templates = [
+    "measurement.measurement.field.region datacenter=1a"
+]
+```
+
+would result in the following Graphite -> Telegraf transformation.
+
+```
+cpu.usage.idle.eu-east 100
+=> cpu_usage,region=eu-east,datacenter=1a idle=100
+```
+
+There are many more options available,
+[More details can be found here](https://github.com/influxdata/influxdb/tree/master/services/graphite#templates)
+
+#### Graphite Configuration:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/tmp/test.sh", "/usr/bin/mycollector --foo=bar"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "graphite"
+
+  ## This string will be used to join the matched values.
+  separator = "_"
+
+  ## Each template line requires a template pattern. It can have an optional
+  ## filter before the template and separated by spaces. It can also have optional extra
+  ## tags following the template. Multiple tags should be separated by commas and no spaces
+  ## similar to the line protocol format. There can be only one default template.
+  ## Templates support below format:
+  ## 1. filter + template
+  ## 2. filter + template + extra tag(s)
+  ## 3. filter + template with field key
+  ## 4. default template
+  templates = [
+    "*.app env.service.resource.measurement",
+    "stats.* .host.measurement* region=eu-east,agent=sensu",
+    "stats2.* .host.measurement.field",
+    "measurement*"
+  ]
+```
+
+# Nagios:
+
+There are no additional configuration options for Nagios line-protocol. The
+metrics are parsed directly into Telegraf metrics.
+
+Note: Nagios Input Data Formats is only supported in `exec` input plugin.
+
+#### Nagios Configuration:
+
+```toml
+[[inputs.exec]]
+  ## Commands array
+  commands = ["/usr/lib/nagios/plugins/check_load", "-w 5,6,7 -c 7,8,9"]
+
+  ## measurement name suffix (for separating different commands)
+  name_suffix = "_mycollector"
+
+  ## Data format to consume.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+  data_format = "nagios"
+```

docs/DATA_FORMATS_OUTPUT.md

@@ -0,0 +1,150 @@
+# Telegraf Output Data Formats
+
+Telegraf is able to serialize metrics into the following output data formats:
+
+1. [InfluxDB Line Protocol](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md#influx)
+1. [JSON](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md#json)
+1. [Graphite](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md#graphite)
+
+Telegraf metrics, like InfluxDB
+[points](https://docs.influxdata.com/influxdb/v0.10/write_protocols/line/),
+are a combination of four basic parts:
+
+1. Measurement Name
+1. Tags
+1. Fields
+1. Timestamp
+
+In InfluxDB line protocol, these 4 parts are easily defined in textual form:
+
+```
+measurement_name[,tag1=val1,...]  field1=val1[,field2=val2,...]  [timestamp]
+```
+
+For Telegraf outputs that write textual data (such as `kafka`, `mqtt`, and `file`),
+InfluxDB line protocol was originally the only available output format. But now
+we are normalizing telegraf metric "serializers" into a
+[plugin-like interface](https://github.com/influxdata/telegraf/tree/master/plugins/serializers)
+across all output plugins that can support it.
+You will be able to identify a plugin that supports different data formats
+by the presence of a `data_format`
+config option, for example, in the `file` output plugin:
+
+```toml
+[[outputs.file]]
+  ## Files to write to, "stdout" is a specially handled file.
+  files = ["stdout"]
+
+  ## Data format to output.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+  data_format = "influx"
+
+  ## Additional configuration options go here
+```
+
+Each data_format has an additional set of configuration options available, which
+I'll go over below.
+
+# Influx:
+
+There are no additional configuration options for InfluxDB line-protocol. The
+metrics are serialized directly into InfluxDB line-protocol.
+
+### Influx Configuration:
+
+```toml
+[[outputs.file]]
+  ## Files to write to, "stdout" is a specially handled file.
+  files = ["stdout", "/tmp/metrics.out"]
+
+  ## Data format to output.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+  data_format = "influx"
+```
+
+# Graphite:
+
+The Graphite data format translates Telegraf metrics into _dot_ buckets. A
+template can be specified for the output of Telegraf metrics into Graphite
+buckets. The default template is:
+
+```
+template = "host.tags.measurement.field"
+```
+
+In the above template, we have four parts:
+
+1. _host_ is a tag key. This can be any tag key that is in the Telegraf
+metric(s). If the key doesn't exist, it will be ignored. If it does exist, the
+tag value will be filled in.
+1. _tags_ is a special keyword that outputs all remaining tag values, separated
+by dots and in alphabetical order (by tag key). These will be filled after all
+tag keys are filled.
+1. _measurement_ is a special keyword that outputs the measurement name.
+1. _field_ is a special keyword that outputs the field name.
+
+Which means the following influx metric -> graphite conversion would happen:
+
+```
+cpu,cpu=cpu-total,dc=us-east-1,host=tars usage_idle=98.09,usage_user=0.89 1455320660004257758
+=>
+tars.cpu-total.us-east-1.cpu.usage_user 0.89 1455320690
+tars.cpu-total.us-east-1.cpu.usage_idle 98.09 1455320690
+```
+
+### Graphite Configuration:
+
+```toml
+[[outputs.file]]
+  ## Files to write to, "stdout" is a specially handled file.
+  files = ["stdout", "/tmp/metrics.out"]
+
+  ## Data format to output.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+  data_format = "graphite"
+
+  # prefix each graphite bucket
+  prefix = "telegraf"
+  # graphite template
+  template = "host.tags.measurement.field"
+```
+
+# JSON:
+
+The JSON data format serialized Telegraf metrics in json format. The format is:
+
+```json
+{
+   "fields":{
+      "field_1":30,
+      "field_2":4,
+      "field_N":59,
+      "n_images":660
+   },
+   "name":"docker",
+   "tags":{
+      "host":"raynor"
+   },
+   "timestamp":1458229140
+}
+```
+
+### JSON Configuration:
+
+```toml
+[[outputs.file]]
+  ## Files to write to, "stdout" is a specially handled file.
+  files = ["stdout", "/tmp/metrics.out"]
+
+  ## Data format to output.
+  ## Each data format has it's own unique set of configuration options, read
+  ## more about them here:
+  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+  data_format = "json"
+```

docs/LICENSE_OF_DEPENDENCIES.md

@@ -12,10 +12,11 @@
 - github.com/gogo/protobuf [BSD LICENSE](https://github.com/gogo/protobuf/blob/master/LICENSE)
 - github.com/golang/protobuf [BSD LICENSE](https://github.com/golang/protobuf/blob/master/LICENSE)
 - github.com/golang/snappy [BSD LICENSE](https://github.com/golang/snappy/blob/master/LICENSE)
-- github.com/gonuts/go-shellquote (No License, but the project it was forked from https://github.com/kballard/go-shellquote is [MIT](https://github.com/kballard/go-shellquote/blob/master/LICENSE)).
 - github.com/hashicorp/go-msgpack [BSD LICENSE](https://github.com/hashicorp/go-msgpack/blob/master/LICENSE)
 - github.com/hashicorp/raft [MPL LICENSE](https://github.com/hashicorp/raft/blob/master/LICENSE)
 - github.com/hashicorp/raft-boltdb [MPL LICENSE](https://github.com/hashicorp/raft-boltdb/blob/master/LICENSE)
+- github.com/kardianos/service [ZLIB LICENSE](https://github.com/kardianos/service/blob/master/LICENSE) (License not named but matches word for word with ZLib)
+- github.com/kballard/go-shellquote [MIT LICENSE](https://github.com/kballard/go-shellquote/blob/master/LICENSE)
 - github.com/lib/pq [MIT LICENSE](https://github.com/lib/pq/blob/master/LICENSE.md)
 - github.com/matttproud/golang_protobuf_extensions [APACHE LICENSE](https://github.com/matttproud/golang_protobuf_extensions/blob/master/LICENSE)
 - github.com/naoina/go-stringutil [MIT LICENSE](https://github.com/naoina/go-stringutil/blob/master/LICENSE)
@@ -28,6 +29,5 @@
 - github.com/wvanbergen/kazoo-go [MIT LICENSE](https://github.com/wvanbergen/kazoo-go/blob/master/MIT-LICENSE)
 - gopkg.in/dancannon/gorethink.v1 [APACHE LICENSE](https://github.com/dancannon/gorethink/blob/v1.1.2/LICENSE)
 - gopkg.in/mgo.v2 [BSD LICENSE](https://github.com/go-mgo/mgo/blob/v2/LICENSE)
-- golang.org/x/crypto/* [BSD LICENSE](https://github.com/golang/crypto/blob/master/LICENSE)
-- internal Glob function [MIT LICENSE](https://github.com/ryanuber/go-glob/blob/master/LICENSE)
+- golang.org/x/crypto/ [BSD LICENSE](https://github.com/golang/crypto/blob/master/LICENSE)
 

docs/WINDOWS_SERVICE.md

@@ -0,0 +1,39 @@
+# Running Telegraf as a Windows Service
+
+Telegraf natively supports running as a Windows Service. Outlined below is are
+the general steps to set it up.
+
+1. Obtain the telegraf windows distribution
+2. Create the directory `C:\Program Files\Telegraf` (if you install in a different
+   location simply specify the `-config` parameter with the desired location)
+3. Place the telegraf.exe and the telegraf.conf config file into `C:\Program Files\Telegraf`
+4. To install the service into the Windows Service Manager, run the following in PowerShell as an administrator (If necessary, you can wrap any spaces in the file paths in double quotes ""):
+
+   ```
+   > C:\"Program Files"\Telegraf\telegraf.exe --service install
+   ```
+
+5. Edit the configuration file to meet your needs
+6. To check that it works, run:
+
+   ```
+   > C:\"Program Files"\Telegraf\telegraf.exe --config C:\"Program Files"\Telegraf\telegraf.conf --test
+   ```
+
+7. To start collecting data, run:
+
+   ```
+   > net start telegraf
+   ```
+
+## Other supported operations
+
+Telegraf can manage its own service through the --service flag:
+
+| Command                            | Effect                        |
+|------------------------------------|-------------------------------|
+| `telegraf.exe --service install`   | Install telegraf as a service |
+| `telegraf.exe --service uninstall` | Remove the telegraf service   |
+| `telegraf.exe --service start`     | Start the telegraf service    |
+| `telegraf.exe --service stop`      | Stop the telegraf service     |
+

etc/telegraf_windows.conf

@@ -0,0 +1,203 @@
+# Telegraf configuration
+
+# Telegraf is entirely plugin driven. All metrics are gathered from the
+# declared inputs, and sent to the declared outputs.
+
+# Plugins must be declared in here to be active.
+# To deactivate a plugin, comment out the name and any variables.
+
+# Use 'telegraf -config telegraf.conf -test' to see what metrics a config
+# file would generate.
+
+# Global tags can be specified here in key="value" format.
+[global_tags]
+  # dc = "us-east-1" # will tag all metrics with dc=us-east-1
+  # rack = "1a"
+
+# Configuration for telegraf agent
+[agent]
+  ## Default data collection interval for all inputs
+  interval = "10s"
+  ## Rounds collection interval to 'interval'
+  ## ie, if interval="10s" then always collect on :00, :10, :20, etc.
+  round_interval = true
+
+  ## Telegraf will cache metric_buffer_limit metrics for each output, and will
+  ## flush this buffer on a successful write.
+  metric_buffer_limit = 1000
+  ## Flush the buffer whenever full, regardless of flush_interval.
+  flush_buffer_when_full = true
+
+  ## Collection jitter is used to jitter the collection by a random amount.
+  ## Each plugin will sleep for a random time within jitter before collecting.
+  ## This can be used to avoid many plugins querying things like sysfs at the
+  ## same time, which can have a measurable effect on the system.
+  collection_jitter = "0s"
+
+  ## Default flushing interval for all outputs. You shouldn't set this below
+  ## interval. Maximum flush_interval will be flush_interval + flush_jitter
+  flush_interval = "10s"
+  ## Jitter the flush interval by a random amount. This is primarily to avoid
+  ## large write spikes for users running a large number of telegraf instances.
+  ## ie, a jitter of 5s and interval 10s means flushes will happen every 10-15s
+  flush_jitter = "0s"
+
+  ## Logging configuration:
+  ## Run telegraf in debug mode
+  debug = false
+  ## Run telegraf in quiet mode
+  quiet = false
+  ## Specify the log file name. The empty string means to log to stdout.
+  logfile = "/Program Files/Telegraf/telegraf.log"
+
+  ## Override default hostname, if empty use os.Hostname()
+  hostname = ""
+
+
+###############################################################################
+#                                  OUTPUTS                                    #
+###############################################################################
+
+# Configuration for influxdb server to send metrics to
+[[outputs.influxdb]]
+  # The full HTTP or UDP endpoint URL for your InfluxDB instance.
+  # Multiple urls can be specified but it is assumed that they are part of the same
+  # cluster, this means that only ONE of the urls will be written to each interval.
+  # urls = ["udp://localhost:8089"] # UDP endpoint example
+  urls = ["http://localhost:8086"] # required
+  # The target database for metrics (telegraf will create it if not exists)
+  database = "telegraf" # required
+  # Precision of writes, valid values are "ns", "us" (or "µs"), "ms", "s", "m", "h".
+  # note: using second precision greatly helps InfluxDB compression
+  precision = "s"
+
+  ## Write timeout (for the InfluxDB client), formatted as a string.
+  ## If not provided, will default to 5s. 0s means no timeout (not recommended).
+  timeout = "5s"
+  # username = "telegraf"
+  # password = "metricsmetricsmetricsmetrics"
+  # Set the user agent for HTTP POSTs (can be useful for log differentiation)
+  # user_agent = "telegraf"
+  # Set UDP payload size, defaults to InfluxDB UDP Client default (512 bytes)
+  # udp_payload = 512
+
+
+###############################################################################
+#                                  INPUTS                                     #
+###############################################################################
+
+# Windows Performance Counters plugin.
+# These are the recommended method of monitoring system metrics on windows,
+# as the regular system plugins (inputs.cpu, inputs.mem, etc.) rely on WMI,
+# which utilize more system resources.
+#
+# See more configuration examples at:
+#   https://github.com/influxdata/telegraf/tree/master/plugins/inputs/win_perf_counters
+
+[[inputs.win_perf_counters]]
+  [[inputs.win_perf_counters.object]]
+    # Processor usage, alternative to native, reports on a per core.
+    ObjectName = "Processor"
+    Instances = ["*"]
+    Counters = [
+      "% Idle Time",
+      "% Interrupt Time",
+      "% Privileged Time",
+      "% User Time",
+      "% Processor Time",
+    ]
+    Measurement = "win_cpu"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    # Disk times and queues
+    ObjectName = "LogicalDisk"
+    Instances = ["*"]
+    Counters = [
+      "% Idle Time",
+      "% Disk Time","% Disk Read Time",
+      "% Disk Write Time",
+      "% User Time",
+      "Current Disk Queue Length",
+    ]
+    Measurement = "win_disk"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "System"
+    Counters = [
+      "Context Switches/sec",
+      "System Calls/sec",
+      "Processor Queue Length",
+    ]
+    Instances = ["------"]
+    Measurement = "win_system"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    # Example query where the Instance portion must be removed to get data back,
+    # such as from the Memory object.
+    ObjectName = "Memory"
+    Counters = [
+      "Available Bytes",
+      "Cache Faults/sec",
+      "Demand Zero Faults/sec",
+      "Page Faults/sec",
+      "Pages/sec",
+      "Transition Faults/sec",
+      "Pool Nonpaged Bytes",
+      "Pool Paged Bytes",
+    ]
+    # Use 6 x - to remove the Instance bit from the query.
+    Instances = ["------"]
+    Measurement = "win_mem"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+
+# Windows system plugins using WMI (disabled by default, using
+# win_perf_counters over WMI is recommended)
+
+# # Read metrics about cpu usage
+# [[inputs.cpu]]
+#   ## Whether to report per-cpu stats or not
+#   percpu = true
+#   ## Whether to report total system cpu stats or not
+#   totalcpu = true
+#   ## Comment this line if you want the raw CPU time metrics
+#   fielddrop = ["time_*"]
+
+
+# # Read metrics about disk usage by mount point
+# [[inputs.disk]]
+#   ## By default, telegraf gather stats for all mountpoints.
+#   ## Setting mountpoints will restrict the stats to the specified mountpoints.
+#   ## mount_points=["/"]
+#
+#   ## Ignore some mountpoints by filesystem type. For example (dev)tmpfs (usually
+#   ## present on /run, /var/run, /dev/shm or /dev).
+#   # ignore_fs = ["tmpfs", "devtmpfs"]
+
+
+# # Read metrics about disk IO by device
+# [[inputs.diskio]]
+#   ## By default, telegraf will gather stats for all devices including
+#   ## disk partitions.
+#   ## Setting devices will restrict the stats to the specified devices.
+#   ## devices = ["sda", "sdb"]
+#   ## Uncomment the following line if you do not need disk serial numbers.
+#   ## skip_serial_number = true
+
+
+# # Read metrics about memory usage
+# [[inputs.mem]]
+#   # no configuration
+
+
+# # Read metrics about swap memory usage
+# [[inputs.swap]]
+#   # no configuration
+

filter/filter.go

@@ -0,0 +1,79 @@
+package filter
+
+import (
+	"strings"
+
+	"github.com/gobwas/glob"
+)
+
+type Filter interface {
+	Match(string) bool
+}
+
+// Compile takes a list of string filters and returns a Filter interface
+// for matching a given string against the filter list. The filter list
+// supports glob matching too, ie:
+//
+//   f, _ := Compile([]string{"cpu", "mem", "net*"})
+//   f.Match("cpu")     // true
+//   f.Match("network") // true
+//   f.Match("memory")  // false
+//
+func Compile(filters []string) (Filter, error) {
+	// return if there is nothing to compile
+	if len(filters) == 0 {
+		return nil, nil
+	}
+
+	// check if we can compile a non-glob filter
+	noGlob := true
+	for _, filter := range filters {
+		if hasMeta(filter) {
+			noGlob = false
+			break
+		}
+	}
+
+	switch {
+	case noGlob:
+		// return non-globbing filter if not needed.
+		return compileFilterNoGlob(filters), nil
+	case len(filters) == 1:
+		return glob.Compile(filters[0])
+	default:
+		return glob.Compile("{" + strings.Join(filters, ",") + "}")
+	}
+}
+
+// hasMeta reports whether path contains any magic glob characters.
+func hasMeta(s string) bool {
+	return strings.IndexAny(s, "*?[") >= 0
+}
+
+type filter struct {
+	m map[string]struct{}
+}
+
+func (f *filter) Match(s string) bool {
+	_, ok := f.m[s]
+	return ok
+}
+
+type filtersingle struct {
+	s string
+}
+
+func (f *filtersingle) Match(s string) bool {
+	return f.s == s
+}
+
+func compileFilterNoGlob(filters []string) Filter {
+	if len(filters) == 1 {
+		return &filtersingle{s: filters[0]}
+	}
+	out := filter{m: make(map[string]struct{})}
+	for _, filter := range filters {
+		out.m[filter] = struct{}{}
+	}
+	return &out
+}

filter/filter_test.go

@@ -0,0 +1,96 @@
+package filter
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCompile(t *testing.T) {
+	f, err := Compile([]string{})
+	assert.NoError(t, err)
+	assert.Nil(t, f)
+
+	f, err = Compile([]string{"cpu"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.False(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu*"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.True(t, f.Match("cpu0"))
+	assert.False(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu", "mem"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.True(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu", "mem", "net*"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.True(t, f.Match("mem"))
+	assert.True(t, f.Match("network"))
+}
+
+var benchbool bool
+
+func BenchmarkFilterSingleNoGlobFalse(b *testing.B) {
+	f, _ := Compile([]string{"cpu"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilterSingleNoGlobTrue(b *testing.B) {
+	f, _ := Compile([]string{"cpu"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("cpu")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter(b *testing.B) {
+	f, _ := Compile([]string{"cpu", "mem", "net*"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilterNoGlob(b *testing.B) {
+	f, _ := Compile([]string{"cpu", "mem", "net"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("net")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter2(b *testing.B) {
+	f, _ := Compile([]string{"aa", "bb", "c", "ad", "ar", "at", "aq",
+		"aw", "az", "axxx", "ab", "cpu", "mem", "net*"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter2NoGlob(b *testing.B) {
+	f, _ := Compile([]string{"aa", "bb", "c", "ad", "ar", "at", "aq",
+		"aw", "az", "axxx", "ab", "cpu", "mem", "net"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("net")
+	}
+	benchbool = tmp
+}

input.go

@@ -0,0 +1,31 @@
+package telegraf
+
+type Input interface {
+	// SampleConfig returns the default configuration of the Input
+	SampleConfig() string
+
+	// Description returns a one-sentence description on the Input
+	Description() string
+
+	// Gather takes in an accumulator and adds the metrics that the Input
+	// gathers. This is called every "interval"
+	Gather(Accumulator) error
+}
+
+type ServiceInput interface {
+	// SampleConfig returns the default configuration of the Input
+	SampleConfig() string
+
+	// Description returns a one-sentence description on the Input
+	Description() string
+
+	// Gather takes in an accumulator and adds the metrics that the Input
+	// gathers. This is called every "interval"
+	Gather(Accumulator) error
+
+	// Start starts the ServiceInput's service, whatever that may be
+	Start(Accumulator) error
+
+	// Stop stops the services and closes any necessary channels and connections
+	Stop()
+}

internal/buffer/buffer.go

@@ -0,0 +1,74 @@
+package buffer
+
+import (
+	"sync"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+var (
+	MetricsWritten = selfstat.Register("agent", "metrics_written", map[string]string{})
+	MetricsDropped = selfstat.Register("agent", "metrics_dropped", map[string]string{})
+)
+
+// Buffer is an object for storing metrics in a circular buffer.
+type Buffer struct {
+	buf chan telegraf.Metric
+
+	mu sync.Mutex
+}
+
+// NewBuffer returns a Buffer
+//   size is the maximum number of metrics that Buffer will cache. If Add is
+//   called when the buffer is full, then the oldest metric(s) will be dropped.
+func NewBuffer(size int) *Buffer {
+	return &Buffer{
+		buf: make(chan telegraf.Metric, size),
+	}
+}
+
+// IsEmpty returns true if Buffer is empty.
+func (b *Buffer) IsEmpty() bool {
+	return len(b.buf) == 0
+}
+
+// Len returns the current length of the buffer.
+func (b *Buffer) Len() int {
+	return len(b.buf)
+}
+
+// Add adds metrics to the buffer.
+func (b *Buffer) Add(metrics ...telegraf.Metric) {
+	for i, _ := range metrics {
+		MetricsWritten.Incr(1)
+		select {
+		case b.buf <- metrics[i]:
+		default:
+			MetricsDropped.Incr(1)
+			<-b.buf
+			b.buf <- metrics[i]
+		}
+	}
+}
+
+// Batch returns a batch of metrics of size batchSize.
+// the batch will be of maximum length batchSize. It can be less than batchSize,
+// if the length of Buffer is less than batchSize.
+func (b *Buffer) Batch(batchSize int) []telegraf.Metric {
+	b.mu.Lock()
+	n := min(len(b.buf), batchSize)
+	out := make([]telegraf.Metric, n)
+	for i := 0; i < n; i++ {
+		out[i] = <-b.buf
+	}
+	b.mu.Unlock()
+	return out
+}
+
+func min(a, b int) int {
+	if b < a {
+		return b
+	}
+	return a
+}

internal/buffer/buffer_test.go

@@ -0,0 +1,100 @@
+package buffer
+
+import (
+	"testing"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/testutil"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var metricList = []telegraf.Metric{
+	testutil.TestMetric(2, "mymetric1"),
+	testutil.TestMetric(1, "mymetric2"),
+	testutil.TestMetric(11, "mymetric3"),
+	testutil.TestMetric(15, "mymetric4"),
+	testutil.TestMetric(8, "mymetric5"),
+}
+
+func BenchmarkAddMetrics(b *testing.B) {
+	buf := NewBuffer(10000)
+	m := testutil.TestMetric(1, "mymetric")
+	for n := 0; n < b.N; n++ {
+		buf.Add(m)
+	}
+}
+
+func TestNewBufferBasicFuncs(t *testing.T) {
+	b := NewBuffer(10)
+	MetricsDropped.Set(0)
+	MetricsWritten.Set(0)
+
+	assert.True(t, b.IsEmpty())
+	assert.Zero(t, b.Len())
+	assert.Zero(t, MetricsDropped.Get())
+	assert.Zero(t, MetricsWritten.Get())
+
+	m := testutil.TestMetric(1, "mymetric")
+	b.Add(m)
+	assert.False(t, b.IsEmpty())
+	assert.Equal(t, b.Len(), 1)
+	assert.Equal(t, int64(0), MetricsDropped.Get())
+	assert.Equal(t, int64(1), MetricsWritten.Get())
+
+	b.Add(metricList...)
+	assert.False(t, b.IsEmpty())
+	assert.Equal(t, b.Len(), 6)
+	assert.Equal(t, int64(0), MetricsDropped.Get())
+	assert.Equal(t, int64(6), MetricsWritten.Get())
+}
+
+func TestDroppingMetrics(t *testing.T) {
+	b := NewBuffer(10)
+	MetricsDropped.Set(0)
+	MetricsWritten.Set(0)
+
+	// Add up to the size of the buffer
+	b.Add(metricList...)
+	b.Add(metricList...)
+	assert.False(t, b.IsEmpty())
+	assert.Equal(t, b.Len(), 10)
+	assert.Equal(t, int64(0), MetricsDropped.Get())
+	assert.Equal(t, int64(10), MetricsWritten.Get())
+
+	// Add 5 more and verify they were dropped
+	b.Add(metricList...)
+	assert.False(t, b.IsEmpty())
+	assert.Equal(t, b.Len(), 10)
+	assert.Equal(t, int64(5), MetricsDropped.Get())
+	assert.Equal(t, int64(15), MetricsWritten.Get())
+}
+
+func TestGettingBatches(t *testing.T) {
+	b := NewBuffer(20)
+	MetricsDropped.Set(0)
+	MetricsWritten.Set(0)
+
+	// Verify that the buffer returned is smaller than requested when there are
+	// not as many items as requested.
+	b.Add(metricList...)
+	batch := b.Batch(10)
+	assert.Len(t, batch, 5)
+
+	// Verify that the buffer is now empty
+	assert.True(t, b.IsEmpty())
+	assert.Zero(t, b.Len())
+	assert.Zero(t, MetricsDropped.Get())
+	assert.Equal(t, int64(5), MetricsWritten.Get())
+
+	// Verify that the buffer returned is not more than the size requested
+	b.Add(metricList...)
+	batch = b.Batch(3)
+	assert.Len(t, batch, 3)
+
+	// Verify that buffer is not empty
+	assert.False(t, b.IsEmpty())
+	assert.Equal(t, b.Len(), 2)
+	assert.Equal(t, int64(0), MetricsDropped.Get())
+	assert.Equal(t, int64(10), MetricsWritten.Get())
+}

internal/config/aws/credentials.go

@@ -0,0 +1,49 @@
+package aws
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/session"
+)
+
+type CredentialConfig struct {
+	Region    string
+	AccessKey string
+	SecretKey string
+	RoleARN   string
+	Profile   string
+	Filename  string
+	Token     string
+}
+
+func (c *CredentialConfig) Credentials() client.ConfigProvider {
+	if c.RoleARN != "" {
+		return c.assumeCredentials()
+	} else {
+		return c.rootCredentials()
+	}
+}
+
+func (c *CredentialConfig) rootCredentials() client.ConfigProvider {
+	config := &aws.Config{
+		Region: aws.String(c.Region),
+	}
+	if c.AccessKey != "" || c.SecretKey != "" {
+		config.Credentials = credentials.NewStaticCredentials(c.AccessKey, c.SecretKey, c.Token)
+	} else if c.Profile != "" || c.Filename != "" {
+		config.Credentials = credentials.NewSharedCredentials(c.Filename, c.Profile)
+	}
+
+	return session.New(config)
+}
+
+func (c *CredentialConfig) assumeCredentials() client.ConfigProvider {
+	rootCredentials := c.rootCredentials()
+	config := &aws.Config{
+		Region: aws.String(c.Region),
+	}
+	config.Credentials = stscreds.NewCredentials(rootCredentials, c.RoleARN)
+	return session.New(config)
+}

internal/config/config_test.go

@@ -1,48 +1,99 @@
 package config
 
 import (
+	"os"
 	"testing"
 	"time"
 
-	"github.com/influxdb/telegraf/plugins"
-	"github.com/influxdb/telegraf/plugins/exec"
-	"github.com/influxdb/telegraf/plugins/memcached"
-	"github.com/influxdb/telegraf/plugins/procstat"
+	"github.com/influxdata/telegraf/internal/models"
+	"github.com/influxdata/telegraf/plugins/inputs"
+	"github.com/influxdata/telegraf/plugins/inputs/exec"
+	"github.com/influxdata/telegraf/plugins/inputs/memcached"
+	"github.com/influxdata/telegraf/plugins/inputs/procstat"
+	"github.com/influxdata/telegraf/plugins/parsers"
+
 	"github.com/stretchr/testify/assert"
 )
 
-func TestConfig_LoadSinglePlugin(t *testing.T) {
+func TestConfig_LoadSingleInputWithEnvVars(t *testing.T) {
+	c := NewConfig()
+	err := os.Setenv("MY_TEST_SERVER", "192.168.1.1")
+	assert.NoError(t, err)
+	err = os.Setenv("TEST_INTERVAL", "10s")
+	assert.NoError(t, err)
+	c.LoadConfig("./testdata/single_plugin_env_vars.toml")
+
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
+	memcached.Servers = []string{"192.168.1.1"}
+
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			models.TagFilter{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
+			},
+		},
+		TagPass: []models.TagFilter{
+			models.TagFilter{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
+		Interval: 10 * time.Second,
+	}
+	mConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, memcached, c.Inputs[0].Input,
+		"Testdata did not produce a correct memcached struct.")
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
+		"Testdata did not produce correct memcached metadata.")
+}
+
+func TestConfig_LoadSingleInput(t *testing.T) {
 	c := NewConfig()
 	c.LoadConfig("./testdata/single_plugin.toml")
 
-	memcached := plugins.Plugins["memcached"]().(*memcached.Memcached)
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
 	memcached.Servers = []string{"localhost"}
 
-	mConfig := &PluginConfig{
-		Name: "memcached",
-		Filter: Filter{
-			Drop: []string{"other", "stuff"},
-			Pass: []string{"some", "strings"},
-			TagDrop: []TagFilter{
-				TagFilter{
-					Name:   "badtag",
-					Filter: []string{"othertag"},
-				},
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			models.TagFilter{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
 			},
-			TagPass: []TagFilter{
-				TagFilter{
-					Name:   "goodtag",
-					Filter: []string{"mytag"},
-				},
-			},
-			IsActive: true,
 		},
+		TagPass: []models.TagFilter{
+			models.TagFilter{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
 		Interval: 5 * time.Second,
 	}
+	mConfig.Tags = make(map[string]string)
 
-	assert.Equal(t, memcached, c.Plugins[0].Plugin,
+	assert.Equal(t, memcached, c.Inputs[0].Input,
 		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Plugins[0].Config,
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
 		"Testdata did not produce correct memcached metadata.")
 }
 
@@ -57,240 +108,69 @@ func TestConfig_LoadDirectory(t *testing.T) {
 		t.Error(err)
 	}
 
-	memcached := plugins.Plugins["memcached"]().(*memcached.Memcached)
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
 	memcached.Servers = []string{"localhost"}
 
-	mConfig := &PluginConfig{
-		Name: "memcached",
-		Filter: Filter{
-			Drop: []string{"other", "stuff"},
-			Pass: []string{"some", "strings"},
-			TagDrop: []TagFilter{
-				TagFilter{
-					Name:   "badtag",
-					Filter: []string{"othertag"},
-				},
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			models.TagFilter{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
 			},
-			TagPass: []TagFilter{
-				TagFilter{
-					Name:   "goodtag",
-					Filter: []string{"mytag"},
-				},
-			},
-			IsActive: true,
 		},
+		TagPass: []models.TagFilter{
+			models.TagFilter{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
 		Interval: 5 * time.Second,
 	}
-	assert.Equal(t, memcached, c.Plugins[0].Plugin,
+	mConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, memcached, c.Inputs[0].Input,
 		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Plugins[0].Config,
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
 		"Testdata did not produce correct memcached metadata.")
 
-	ex := plugins.Plugins["exec"]().(*exec.Exec)
-	ex.Commands = []*exec.Command{
-		&exec.Command{
-			Command: "/usr/bin/myothercollector --foo=bar",
-			Name:    "myothercollector",
-		},
+	ex := inputs.Inputs["exec"]().(*exec.Exec)
+	p, err := parsers.NewJSONParser("exec", nil, nil)
+	assert.NoError(t, err)
+	ex.SetParser(p)
+	ex.Command = "/usr/bin/myothercollector --foo=bar"
+	eConfig := &models.InputConfig{
+		Name:              "exec",
+		MeasurementSuffix: "_myothercollector",
 	}
-	eConfig := &PluginConfig{Name: "exec"}
-	assert.Equal(t, ex, c.Plugins[1].Plugin,
+	eConfig.Tags = make(map[string]string)
+	assert.Equal(t, ex, c.Inputs[1].Input,
 		"Merged Testdata did not produce a correct exec struct.")
-	assert.Equal(t, eConfig, c.Plugins[1].Config,
+	assert.Equal(t, eConfig, c.Inputs[1].Config,
 		"Merged Testdata did not produce correct exec metadata.")
 
 	memcached.Servers = []string{"192.168.1.1"}
-	assert.Equal(t, memcached, c.Plugins[2].Plugin,
+	assert.Equal(t, memcached, c.Inputs[2].Input,
 		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Plugins[2].Config,
+	assert.Equal(t, mConfig, c.Inputs[2].Config,
 		"Testdata did not produce correct memcached metadata.")
 
-	pstat := plugins.Plugins["procstat"]().(*procstat.Procstat)
-	pstat.Specifications = []*procstat.Specification{
-		&procstat.Specification{
-			PidFile: "/var/run/grafana-server.pid",
-		},
-		&procstat.Specification{
-			PidFile: "/var/run/influxdb/influxd.pid",
-		},
-	}
+	pstat := inputs.Inputs["procstat"]().(*procstat.Procstat)
+	pstat.PidFile = "/var/run/grafana-server.pid"
 
-	pConfig := &PluginConfig{Name: "procstat"}
+	pConfig := &models.InputConfig{Name: "procstat"}
+	pConfig.Tags = make(map[string]string)
 
-	assert.Equal(t, pstat, c.Plugins[3].Plugin,
+	assert.Equal(t, pstat, c.Inputs[3].Input,
 		"Merged Testdata did not produce a correct procstat struct.")
-	assert.Equal(t, pConfig, c.Plugins[3].Config,
+	assert.Equal(t, pConfig, c.Inputs[3].Config,
 		"Merged Testdata did not produce correct procstat metadata.")
 }
-
-func TestFilter_Empty(t *testing.T) {
-	f := Filter{}
-
-	measurements := []string{
-		"foo",
-		"bar",
-		"barfoo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"supercalifradjulisticexpialidocious",
-	}
-
-	for _, measurement := range measurements {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-}
-
-func TestFilter_Pass(t *testing.T) {
-	f := Filter{
-		Pass: []string{"foo*", "cpu_usage_idle"},
-	}
-
-	passes := []string{
-		"foo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"cpu_usage_idle",
-	}
-
-	drops := []string{
-		"bar",
-		"barfoo",
-		"bar_foo",
-		"cpu_usage_busy",
-	}
-
-	for _, measurement := range passes {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-
-	for _, measurement := range drops {
-		if f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to drop", measurement)
-		}
-	}
-}
-
-func TestFilter_Drop(t *testing.T) {
-	f := Filter{
-		Drop: []string{"foo*", "cpu_usage_idle"},
-	}
-
-	drops := []string{
-		"foo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"cpu_usage_idle",
-	}
-
-	passes := []string{
-		"bar",
-		"barfoo",
-		"bar_foo",
-		"cpu_usage_busy",
-	}
-
-	for _, measurement := range passes {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-
-	for _, measurement := range drops {
-		if f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to drop", measurement)
-		}
-	}
-}
-
-func TestFilter_TagPass(t *testing.T) {
-	filters := []TagFilter{
-		TagFilter{
-			Name:   "cpu",
-			Filter: []string{"cpu-*"},
-		},
-		TagFilter{
-			Name:   "mem",
-			Filter: []string{"mem_free"},
-		}}
-	f := Filter{
-		TagPass: filters,
-	}
-
-	passes := []map[string]string{
-		{"cpu": "cpu-total"},
-		{"cpu": "cpu-0"},
-		{"cpu": "cpu-1"},
-		{"cpu": "cpu-2"},
-		{"mem": "mem_free"},
-	}
-
-	drops := []map[string]string{
-		{"cpu": "cputotal"},
-		{"cpu": "cpu0"},
-		{"cpu": "cpu1"},
-		{"cpu": "cpu2"},
-		{"mem": "mem_used"},
-	}
-
-	for _, tags := range passes {
-		if !f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to pass", tags)
-		}
-	}
-
-	for _, tags := range drops {
-		if f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to drop", tags)
-		}
-	}
-}
-
-func TestFilter_TagDrop(t *testing.T) {
-	filters := []TagFilter{
-		TagFilter{
-			Name:   "cpu",
-			Filter: []string{"cpu-*"},
-		},
-		TagFilter{
-			Name:   "mem",
-			Filter: []string{"mem_free"},
-		}}
-	f := Filter{
-		TagDrop: filters,
-	}
-
-	drops := []map[string]string{
-		{"cpu": "cpu-total"},
-		{"cpu": "cpu-0"},
-		{"cpu": "cpu-1"},
-		{"cpu": "cpu-2"},
-		{"mem": "mem_free"},
-	}
-
-	passes := []map[string]string{
-		{"cpu": "cputotal"},
-		{"cpu": "cpu0"},
-		{"cpu": "cpu1"},
-		{"cpu": "cpu2"},
-		{"mem": "mem_used"},
-	}
-
-	for _, tags := range passes {
-		if !f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to pass", tags)
-		}
-	}
-
-	for _, tags := range drops {
-		if f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to drop", tags)
-		}
-	}
-}

internal/config/testdata/single_plugin.toml

@@ -1,9 +1,11 @@
-[[plugins.memcached]]
+[[inputs.memcached]]
   servers = ["localhost"]
-  pass = ["some", "strings"]
-  drop = ["other", "stuff"]
+  namepass = ["metricname1"]
+  namedrop = ["metricname2"]
+  fieldpass = ["some", "strings"]
+  fielddrop = ["other", "stuff"]
   interval = "5s"
-  [plugins.memcached.tagpass]
+  [inputs.memcached.tagpass]
     goodtag = ["mytag"]
-  [plugins.memcached.tagdrop]
+  [inputs.memcached.tagdrop]
     badtag = ["othertag"]

internal/config/testdata/single_plugin_env_vars.toml

@@ -0,0 +1,11 @@
+[[inputs.memcached]]
+  servers = ["$MY_TEST_SERVER"]
+  namepass = ["metricname1"]
+  namedrop = ["metricname2"]
+  fieldpass = ["some", "strings"]
+  fielddrop = ["other", "stuff"]
+  interval = "$TEST_INTERVAL"
+  [inputs.memcached.tagpass]
+    goodtag = ["mytag"]
+  [inputs.memcached.tagdrop]
+    badtag = ["othertag"]

internal/config/testdata/subconfig/exec.conf

@@ -1,8 +1,4 @@
-[[plugins.exec]]
-  # specify commands via an array of tables
-  [[plugins.exec.commands]]
+[[inputs.exec]]
   # the command to run
   command = "/usr/bin/myothercollector --foo=bar"
-
-  # name of the command (used as a prefix for measurements)
-  name = "myothercollector"
+  name_suffix = "_myothercollector"

internal/config/testdata/subconfig/memcached.conf

@@ -1,9 +1,11 @@
-[[plugins.memcached]]
+[[inputs.memcached]]
   servers = ["192.168.1.1"]
+  namepass = ["metricname1"]
+  namedrop = ["metricname2"]
   pass = ["some", "strings"]
   drop = ["other", "stuff"]
   interval = "5s"
-  [plugins.memcached.tagpass]
+  [inputs.memcached.tagpass]
     goodtag = ["mytag"]
-  [plugins.memcached.tagdrop]
+  [inputs.memcached.tagdrop]
     badtag = ["othertag"]

internal/config/testdata/subconfig/procstat.conf

@@ -1,5 +1,2 @@
-[[plugins.procstat]]
-  [[plugins.procstat.specifications]]
+[[inputs.procstat]]
   pid_file = "/var/run/grafana-server.pid"
-  [[plugins.procstat.specifications]]
-  pid_file = "/var/run/influxdb/influxd.pid"

internal/config/testdata/telegraf-agent.toml

@@ -1,7 +1,7 @@
 # Telegraf configuration
 
 # Telegraf is entirely plugin driven. All metrics are gathered from the
-# declared plugins.
+# declared inputs.
 
 # Even if a plugin has no configuration, it must be declared in here
 # to be active. Declaring a plugin means just specifying the name
@@ -20,21 +20,14 @@
 # with 'required'. Be sure to edit those to make this configuration work.
 
 # Tags can also be specified via a normal map, but only one form at a time:
-[tags]
-  # dc = "us-east-1"
+[global_tags]
+  dc = "us-east-1"
 
 # Configuration for telegraf agent
 [agent]
   # Default data collection interval for all plugins
   interval = "10s"
 
-  # If utc = false, uses local time (utc is highly recommended)
-  utc = true
-
-  # Precision of writes, valid values are n, u, ms, s, m, and h
-  # note: using second precision greatly helps InfluxDB compression
-  precision = "s"
-
   # run telegraf in debug mode
   debug = false
 
@@ -46,8 +39,6 @@
 #                                  OUTPUTS                                    #
 ###############################################################################
 
-[outputs]
-
 # Configuration for influxdb server to send metrics to
 [[outputs.influxdb]]
   # The full HTTP endpoint URL for your InfluxDB instance
@@ -58,17 +49,6 @@
   # The target database for metrics. This database must already exist
   database = "telegraf" # required.
 
-  # Connection timeout (for the connection with InfluxDB), formatted as a string.
-  # Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".
-  # If not provided, will default to 0 (no timeout)
-  # timeout = "5s"
-
-  # username = "telegraf"
-  # password = "metricsmetricsmetricsmetrics"
-
-  # Set the user agent for the POSTs (can be useful for log differentiation)
-  # user_agent = "telegraf"
-
 [[outputs.influxdb]]
   urls = ["udp://localhost:8089"]
   database = "udp-telegraf"
@@ -88,15 +68,13 @@
 #                                  PLUGINS                                    #
 ###############################################################################
 
-[plugins]
-
 # Read Apache status information (mod_status)
-[[plugins.apache]]
-# An array of Apache status URI to gather stats.
-urls = ["http://localhost/server-status?auto"]
+[[inputs.apache]]
+  # An array of Apache status URI to gather stats.
+  urls = ["http://localhost/server-status?auto"]
 
 # Read metrics about cpu usage
-[[plugins.cpu]]
+[[inputs.cpu]]
   # Whether to report per-cpu stats or not
   percpu = true
   # Whether to report total system cpu stats or not
@@ -105,11 +83,11 @@ urls = ["http://localhost/server-status?auto"]
   drop = ["cpu_time"]
 
 # Read metrics about disk usage by mount point
-[[plugins.diskio]]
+[[inputs.diskio]]
   # no configuration
 
 # Read metrics from one or many disque servers
-[[plugins.disque]]
+[[inputs.disque]]
   # An array of URI to gather stats about. Specify an ip or hostname
   # with optional port and password. ie disque://localhost, disque://10.10.3.33:18832,
   # 10.0.0.1:10000, etc.
@@ -118,7 +96,7 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["localhost"]
 
 # Read stats from one or more Elasticsearch servers or clusters
-[[plugins.elasticsearch]]
+[[inputs.elasticsearch]]
   # specify a list of one or more Elasticsearch servers
   servers = ["http://localhost:9200"]
 
@@ -127,17 +105,13 @@ urls = ["http://localhost/server-status?auto"]
   local = true
 
 # Read flattened metrics from one or more commands that output JSON to stdout
-[[plugins.exec]]
-  # specify commands via an array of tables
-  [[exec.commands]]
+[[inputs.exec]]
   # the command to run
   command = "/usr/bin/mycollector --foo=bar"
-
-  # name of the command (used as a prefix for measurements)
-  name = "mycollector"
+  name_suffix = "_mycollector"
 
 # Read metrics of haproxy, via socket or csv stats page
-[[plugins.haproxy]]
+[[inputs.haproxy]]
   # An array of address to gather stats about. Specify an ip on hostname
   # with optional port. ie localhost, 10.10.3.33:1936, etc.
   #
@@ -147,33 +121,30 @@ urls = ["http://localhost/server-status?auto"]
   # servers = ["socket:/run/haproxy/admin.sock"]
 
 # Read flattened metrics from one or more JSON HTTP endpoints
-[[plugins.httpjson]]
-  # Specify services via an array of tables
-  [[httpjson.services]]
+[[inputs.httpjson]]
+  # a name for the service being polled
+  name = "webserver_stats"
 
-    # a name for the service being polled
-    name = "webserver_stats"
+  # URL of each server in the service's cluster
+  servers = [
+    "http://localhost:9999/stats/",
+    "http://localhost:9998/stats/",
+  ]
 
-    # URL of each server in the service's cluster
-    servers = [
-      "http://localhost:9999/stats/",
-      "http://localhost:9998/stats/",
-    ]
+  # HTTP method to use (case-sensitive)
+  method = "GET"
 
-    # HTTP method to use (case-sensitive)
-    method = "GET"
-
-    # HTTP parameters (all values must be strings)
-    [httpjson.services.parameters]
-      event_type = "cpu_spike"
-      threshold = "0.75"
+  # HTTP parameters (all values must be strings)
+  [httpjson.parameters]
+    event_type = "cpu_spike"
+    threshold = "0.75"
 
 # Read metrics about disk IO by device
-[[plugins.io]]
+[[inputs.diskio]]
   # no configuration
 
 # read metrics from a Kafka topic
-[[plugins.kafka_consumer]]
+[[inputs.kafka_consumer]]
   # topic(s) to consume
   topics = ["telegraf"]
   # an array of Zookeeper connection strings
@@ -186,7 +157,7 @@ urls = ["http://localhost/server-status?auto"]
   offset = "oldest"
 
 # Read metrics from a LeoFS Server via SNMP
-[[plugins.leofs]]
+[[inputs.leofs]]
   # An array of URI to gather stats about LeoFS.
   # Specify an ip or hostname with port. ie 127.0.0.1:4020
   #
@@ -194,7 +165,7 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["127.0.0.1:4021"]
 
 # Read metrics from local Lustre service on OST, MDS
-[[plugins.lustre2]]
+[[inputs.lustre2]]
   # An array of /proc globs to search for Lustre stats
   # If not specified, the default will work on Lustre 2.5.x
   #
@@ -202,19 +173,28 @@ urls = ["http://localhost/server-status?auto"]
   # mds_procfiles = ["/proc/fs/lustre/mdt/*/md_stats"]
 
 # Read metrics about memory usage
-[[plugins.mem]]
+[[inputs.mem]]
   # no configuration
 
 # Read metrics from one or many memcached servers
-[[plugins.memcached]]
+[[inputs.memcached]]
   # An array of address to gather stats about. Specify an ip on hostname
   # with optional port. ie localhost, 10.0.0.1:11211, etc.
   #
   # If no servers are specified, then localhost is used as the host.
   servers = ["localhost"]
 
+# Telegraf plugin for gathering metrics from N Mesos masters
+[[inputs.mesos]]
+  # Timeout, in ms.
+  timeout = 100
+  # A list of Mesos masters, default value is localhost:5050.
+  masters = ["localhost:5050"]
+  # Metrics groups to be collected, by default, all enabled.
+  master_collections = ["resources","master","system","slaves","frameworks","messages","evqueue","registrar"]
+
 # Read metrics from one or many MongoDB servers
-[[plugins.mongodb]]
+[[inputs.mongodb]]
   # An array of URI to gather stats about. Specify an ip or hostname
   # with optional port add password. ie mongodb://user:auth_key@10.10.3.30:27017,
   # mongodb://10.10.3.33:18832, 10.0.0.1:10000, etc.
@@ -223,7 +203,7 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["127.0.0.1:27017"]
 
 # Read metrics from one or many mysql servers
-[[plugins.mysql]]
+[[inputs.mysql]]
   # specify servers via a url matching:
   #  [username[:password]@][protocol[(address)]]/[?tls=[true|false|skip-verify]]
   #  e.g.
@@ -234,7 +214,7 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["localhost"]
 
 # Read metrics about network interface usage
-[[plugins.net]]
+[[inputs.net]]
   # By default, telegraf gathers stats from any up interface (excluding loopback)
   # Setting interfaces will tell it to gather these explicit interfaces,
   # regardless of status.
@@ -242,12 +222,12 @@ urls = ["http://localhost/server-status?auto"]
   # interfaces = ["eth0", ... ]
 
 # Read Nginx's basic status information (ngx_http_stub_status_module)
-[[plugins.nginx]]
+[[inputs.nginx]]
   # An array of Nginx stub_status URI to gather stats.
   urls = ["http://localhost/status"]
 
 # Ping given url(s) and return statistics
-[[plugins.ping]]
+[[inputs.ping]]
   # urls to ping
   urls = ["www.google.com"] # required
   # number of pings to send (ping -c <COUNT>)
@@ -260,10 +240,7 @@ urls = ["http://localhost/server-status?auto"]
   interface = ""
 
 # Read metrics from one or many postgresql servers
-[[plugins.postgresql]]
-  # specify servers via an array of tables
-  [[postgresql.servers]]
-
+[[inputs.postgresql]]
   # specify address via a url matching:
   #   postgres://[pqgotest[:password]]@localhost[/dbname]?sslmode=[disable|verify-ca|verify-full]
   # or a simple string:
@@ -290,14 +267,13 @@ urls = ["http://localhost/server-status?auto"]
   # address = "influx@remoteserver"
 
 # Read metrics from one or many prometheus clients
-[[plugins.prometheus]]
+[[inputs.prometheus]]
   # An array of urls to scrape metrics from.
   urls = ["http://localhost:9100/metrics"]
 
 # Read metrics from one or many RabbitMQ servers via the management API
-[[plugins.rabbitmq]]
+[[inputs.rabbitmq]]
   # Specify servers via an array of tables
-  [[rabbitmq.servers]]
   # name = "rmq-server-1" # optional tag
   # url = "http://localhost:15672"
   # username = "guest"
@@ -308,7 +284,7 @@ urls = ["http://localhost/server-status?auto"]
   # nodes = ["rabbit@node1", "rabbit@node2"]
 
 # Read metrics from one or many redis servers
-[[plugins.redis]]
+[[inputs.redis]]
   # An array of URI to gather stats about. Specify an ip or hostname
   # with optional port add password. ie redis://localhost, redis://10.10.3.33:18832,
   # 10.0.0.1:10000, etc.
@@ -317,7 +293,7 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["localhost"]
 
 # Read metrics from one or many RethinkDB servers
-[[plugins.rethinkdb]]
+[[inputs.rethinkdb]]
   # An array of URI to gather stats about. Specify an ip or hostname
   # with optional port add password. ie rethinkdb://user:auth_key@10.10.3.30:28105,
   # rethinkdb://10.10.3.33:18832, 10.0.0.1:10000, etc.
@@ -326,9 +302,9 @@ urls = ["http://localhost/server-status?auto"]
   servers = ["127.0.0.1:28015"]
 
 # Read metrics about swap memory usage
-[[plugins.swap]]
+[[inputs.swap]]
   # no configuration
 
 # Read metrics about system load & uptime
-[[plugins.system]]
+[[inputs.system]]
   # no configuration

internal/errchan/errchan.go

@@ -0,0 +1,37 @@
+package errchan
+
+import (
+	"fmt"
+	"strings"
+)
+
+type ErrChan struct {
+	C chan error
+}
+
+// New returns an error channel of max length 'n'
+// errors can be sent to the ErrChan.C channel, and will be returned when
+// ErrChan.Error() is called.
+func New(n int) *ErrChan {
+	return &ErrChan{
+		C: make(chan error, n),
+	}
+}
+
+// Error closes the ErrChan.C channel and returns an error if there are any
+// non-nil errors, otherwise returns nil.
+func (e *ErrChan) Error() error {
+	close(e.C)
+
+	var out string
+	for err := range e.C {
+		if err != nil {
+			out += "[" + err.Error() + "], "
+		}
+	}
+
+	if out != "" {
+		return fmt.Errorf("Errors encountered: " + strings.TrimRight(out, ", "))
+	}
+	return nil
+}

internal/globpath/globpath.go

@@ -0,0 +1,116 @@
+package globpath
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gobwas/glob"
+)
+
+var sepStr = fmt.Sprintf("%v", string(os.PathSeparator))
+
+type GlobPath struct {
+	path         string
+	hasMeta      bool
+	hasSuperMeta bool
+	g            glob.Glob
+	root         string
+}
+
+func Compile(path string) (*GlobPath, error) {
+	out := GlobPath{
+		hasMeta:      hasMeta(path),
+		hasSuperMeta: hasSuperMeta(path),
+		path:         path,
+	}
+
+	// if there are no glob meta characters in the path, don't bother compiling
+	// a glob object or finding the root directory. (see short-circuit in Match)
+	if !out.hasMeta || !out.hasSuperMeta {
+		return &out, nil
+	}
+
+	var err error
+	if out.g, err = glob.Compile(path, os.PathSeparator); err != nil {
+		return nil, err
+	}
+	// Get the root directory for this filepath
+	out.root = findRootDir(path)
+	return &out, nil
+}
+
+func (g *GlobPath) Match() map[string]os.FileInfo {
+	if !g.hasMeta {
+		out := make(map[string]os.FileInfo)
+		info, err := os.Stat(g.path)
+		if !os.IsNotExist(err) {
+			out[g.path] = info
+		}
+		return out
+	}
+	if !g.hasSuperMeta {
+		out := make(map[string]os.FileInfo)
+		files, _ := filepath.Glob(g.path)
+		for _, file := range files {
+			info, err := os.Stat(file)
+			if !os.IsNotExist(err) {
+				out[file] = info
+			}
+		}
+		return out
+	}
+	return walkFilePath(g.root, g.g)
+}
+
+// walk the filepath from the given root and return a list of files that match
+// the given glob.
+func walkFilePath(root string, g glob.Glob) map[string]os.FileInfo {
+	matchedFiles := make(map[string]os.FileInfo)
+	walkfn := func(path string, info os.FileInfo, _ error) error {
+		if g.Match(path) {
+			matchedFiles[path] = info
+		}
+		return nil
+	}
+	filepath.Walk(root, walkfn)
+	return matchedFiles
+}
+
+// find the root dir of the given path (could include globs).
+// ie:
+//   /var/log/telegraf.conf -> /var/log
+//   /home/** ->               /home
+//   /home/*/** ->             /home
+//   /lib/share/*/*/**.txt ->  /lib/share
+func findRootDir(path string) string {
+	pathItems := strings.Split(path, sepStr)
+	out := sepStr
+	for i, item := range pathItems {
+		if i == len(pathItems)-1 {
+			break
+		}
+		if item == "" {
+			continue
+		}
+		if hasMeta(item) {
+			break
+		}
+		out += item + sepStr
+	}
+	if out != "/" {
+		out = strings.TrimSuffix(out, "/")
+	}
+	return out
+}
+
+// hasMeta reports whether path contains any magic glob characters.
+func hasMeta(path string) bool {
+	return strings.IndexAny(path, "*?[") >= 0
+}
+
+// hasSuperMeta reports whether path contains any super magic glob characters (**).
+func hasSuperMeta(path string) bool {
+	return strings.Index(path, "**") >= 0
+}

internal/globpath/globpath_test.go

@@ -0,0 +1,62 @@
+package globpath
+
+import (
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCompileAndMatch(t *testing.T) {
+	dir := getTestdataDir()
+	// test super asterisk
+	g1, err := Compile(dir + "/**")
+	require.NoError(t, err)
+	// test single asterisk
+	g2, err := Compile(dir + "/*.log")
+	require.NoError(t, err)
+	// test no meta characters (file exists)
+	g3, err := Compile(dir + "/log1.log")
+	require.NoError(t, err)
+	// test file that doesn't exist
+	g4, err := Compile(dir + "/i_dont_exist.log")
+	require.NoError(t, err)
+	// test super asterisk that doesn't exist
+	g5, err := Compile(dir + "/dir_doesnt_exist/**")
+	require.NoError(t, err)
+
+	matches := g1.Match()
+	assert.Len(t, matches, 3)
+	matches = g2.Match()
+	assert.Len(t, matches, 2)
+	matches = g3.Match()
+	assert.Len(t, matches, 1)
+	matches = g4.Match()
+	assert.Len(t, matches, 0)
+	matches = g5.Match()
+	assert.Len(t, matches, 0)
+}
+
+func TestFindRootDir(t *testing.T) {
+	tests := []struct {
+		input  string
+		output string
+	}{
+		{"/var/log/telegraf.conf", "/var/log"},
+		{"/home/**", "/home"},
+		{"/home/*/**", "/home"},
+		{"/lib/share/*/*/**.txt", "/lib/share"},
+	}
+
+	for _, test := range tests {
+		actual := findRootDir(test.input)
+		assert.Equal(t, test.output, actual)
+	}
+}
+
+func getTestdataDir() string {
+	_, filename, _, _ := runtime.Caller(1)
+	return strings.Replace(filename, "globpath_test.go", "testdata", 1)
+}

internal/globpath/testdata/test.conf

@@ -0,0 +1,5 @@
+# this is a fake testing config file
+# for testing the filestat plugin
+
+option1 = "foo"
+option2 = "bar"

internal/internal.go

@@ -2,11 +2,29 @@ package internal
 
 import (
 	"bufio"
+	"bytes"
+	"crypto/rand"
+	"crypto/tls"
+	"crypto/x509"
 	"errors"
 	"fmt"
+	"io/ioutil"
+	"log"
+	"math/big"
 	"os"
+	"os/exec"
+	"strconv"
 	"strings"
 	"time"
+	"unicode"
+)
+
+const alphanum string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+
+var (
+	TimeoutErr = errors.New("Command timed out.")
+
+	NotImplementedError = errors.New("not implemented yet")
 )
 
 // Duration just wraps time.Duration
@@ -16,48 +34,36 @@ type Duration struct {
 
 // UnmarshalTOML parses the duration from the TOML config file
 func (d *Duration) UnmarshalTOML(b []byte) error {
-	dur, err := time.ParseDuration(string(b[1 : len(b)-1]))
-	if err != nil {
-		return err
-	}
+	var err error
+	b = bytes.Trim(b, `'`)
 
-	d.Duration = dur
-
-	return nil
-}
-
-var NotImplementedError = errors.New("not implemented yet")
-
-type JSONFlattener struct {
-	Fields map[string]interface{}
-}
-
-// FlattenJSON flattens nested maps/interfaces into a fields map
-func (f *JSONFlattener) FlattenJSON(
-	fieldname string,
-	v interface{},
-) error {
-	if f.Fields == nil {
-		f.Fields = make(map[string]interface{})
-	}
-	fieldname = strings.Trim(fieldname, "_")
-	switch t := v.(type) {
-	case map[string]interface{}:
-		for k, v := range t {
-			err := f.FlattenJSON(fieldname+"_"+k+"_", v)
-			if err != nil {
-				return err
-			}
-		}
-	case float64:
-		f.Fields[fieldname] = t
-	case bool, string, []interface{}:
-		// ignored types
+	// see if we can directly convert it
+	d.Duration, err = time.ParseDuration(string(b))
+	if err == nil {
 		return nil
-	default:
-		return fmt.Errorf("JSON Flattener: got unexpected type %T with value %v (%s)",
-			t, t, fieldname)
 	}
+
+	// Parse string duration, ie, "1s"
+	if uq, err := strconv.Unquote(string(b)); err == nil && len(uq) > 0 {
+		d.Duration, err = time.ParseDuration(uq)
+		if err == nil {
+			return nil
+		}
+	}
+
+	// First try parsing as integer seconds
+	sI, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sI)
+		return nil
+	}
+	// Second try parsing as float seconds
+	sF, err := strconv.ParseFloat(string(b), 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sF)
+		return nil
+	}
+
 	return nil
 }
 
@@ -96,58 +102,141 @@ func ReadLinesOffsetN(filename string, offset uint, n int) ([]string, error) {
 	return ret, nil
 }
 
-// Glob will test a string pattern, potentially containing globs, against a
-// subject string. The result is a simple true/false, determining whether or
-// not the glob pattern matched the subject text.
-//
-// Adapted from https://github.com/ryanuber/go-glob/blob/master/glob.go
-// thanks Ryan Uber!
-func Glob(pattern, measurement string) bool {
-	// Empty pattern can only match empty subject
-	if pattern == "" {
-		return measurement == pattern
+// RandomString returns a random string of alpha-numeric characters
+func RandomString(n int) string {
+	var bytes = make([]byte, n)
+	rand.Read(bytes)
+	for i, b := range bytes {
+		bytes[i] = alphanum[b%byte(len(alphanum))]
+	}
+	return string(bytes)
+}
+
+// GetTLSConfig gets a tls.Config object from the given certs, key, and CA files.
+// you must give the full path to the files.
+// If all files are blank and InsecureSkipVerify=false, returns a nil pointer.
+func GetTLSConfig(
+	SSLCert, SSLKey, SSLCA string,
+	InsecureSkipVerify bool,
+) (*tls.Config, error) {
+	if SSLCert == "" && SSLKey == "" && SSLCA == "" && !InsecureSkipVerify {
+		return nil, nil
 	}
 
-	// If the pattern _is_ a glob, it matches everything
-	if pattern == "*" {
-		return true
+	t := &tls.Config{
+		InsecureSkipVerify: InsecureSkipVerify,
 	}
 
-	parts := strings.Split(pattern, "*")
-
-	if len(parts) == 1 {
-		// No globs in pattern, so test for match
-		return pattern == measurement
-	}
-
-	leadingGlob := strings.HasPrefix(pattern, "*")
-	trailingGlob := strings.HasSuffix(pattern, "*")
-	end := len(parts) - 1
-
-	for i, part := range parts {
-		switch i {
-		case 0:
-			if leadingGlob {
-				continue
-			}
-			if !strings.HasPrefix(measurement, part) {
-				return false
-			}
-		case end:
-			if len(measurement) > 0 {
-				return trailingGlob || strings.HasSuffix(measurement, part)
-			}
-		default:
-			if !strings.Contains(measurement, part) {
-				return false
-			}
+	if SSLCA != "" {
+		caCert, err := ioutil.ReadFile(SSLCA)
+		if err != nil {
+			return nil, errors.New(fmt.Sprintf("Could not load TLS CA: %s",
+				err))
 		}
 
-		// Trim evaluated text from measurement as we loop over the pattern.
-		idx := strings.Index(measurement, part) + len(part)
-		measurement = measurement[idx:]
+		caCertPool := x509.NewCertPool()
+		caCertPool.AppendCertsFromPEM(caCert)
+		t.RootCAs = caCertPool
 	}
 
-	// All parts of the pattern matched
-	return true
+	if SSLCert != "" && SSLKey != "" {
+		cert, err := tls.LoadX509KeyPair(SSLCert, SSLKey)
+		if err != nil {
+			return nil, errors.New(fmt.Sprintf(
+				"Could not load TLS client key/certificate from %s:%s: %s",
+				SSLKey, SSLCert, err))
+		}
+
+		t.Certificates = []tls.Certificate{cert}
+		t.BuildNameToCertificate()
+	}
+
+	// will be nil by default if nothing is provided
+	return t, nil
+}
+
+// SnakeCase converts the given string to snake case following the Golang format:
+// acronyms are converted to lower-case and preceded by an underscore.
+func SnakeCase(in string) string {
+	runes := []rune(in)
+	length := len(runes)
+
+	var out []rune
+	for i := 0; i < length; i++ {
+		if i > 0 && unicode.IsUpper(runes[i]) && ((i+1 < length && unicode.IsLower(runes[i+1])) || unicode.IsLower(runes[i-1])) {
+			out = append(out, '_')
+		}
+		out = append(out, unicode.ToLower(runes[i]))
+	}
+
+	return string(out)
+}
+
+// CombinedOutputTimeout runs the given command with the given timeout and
+// returns the combined output of stdout and stderr.
+// If the command times out, it attempts to kill the process.
+func CombinedOutputTimeout(c *exec.Cmd, timeout time.Duration) ([]byte, error) {
+	var b bytes.Buffer
+	c.Stdout = &b
+	c.Stderr = &b
+	if err := c.Start(); err != nil {
+		return nil, err
+	}
+	err := WaitTimeout(c, timeout)
+	return b.Bytes(), err
+}
+
+// RunTimeout runs the given command with the given timeout.
+// If the command times out, it attempts to kill the process.
+func RunTimeout(c *exec.Cmd, timeout time.Duration) error {
+	if err := c.Start(); err != nil {
+		return err
+	}
+	return WaitTimeout(c, timeout)
+}
+
+// WaitTimeout waits for the given command to finish with a timeout.
+// It assumes the command has already been started.
+// If the command times out, it attempts to kill the process.
+func WaitTimeout(c *exec.Cmd, timeout time.Duration) error {
+	timer := time.NewTimer(timeout)
+	done := make(chan error)
+	go func() { done <- c.Wait() }()
+	select {
+	case err := <-done:
+		timer.Stop()
+		return err
+	case <-timer.C:
+		if err := c.Process.Kill(); err != nil {
+			log.Printf("E! FATAL error killing process: %s", err)
+			return err
+		}
+		// wait for the command to return after killing it
+		<-done
+		return TimeoutErr
+	}
+}
+
+// RandomSleep will sleep for a random amount of time up to max.
+// If the shutdown channel is closed, it will return before it has finished
+// sleeping.
+func RandomSleep(max time.Duration, shutdown chan struct{}) {
+	if max == 0 {
+		return
+	}
+	maxSleep := big.NewInt(max.Nanoseconds())
+
+	var sleepns int64
+	if j, err := rand.Int(rand.Reader, maxSleep); err == nil {
+		sleepns = j.Int64()
+	}
+
+	t := time.NewTimer(time.Nanosecond * time.Duration(sleepns))
+	select {
+	case <-t.C:
+		return
+	case <-shutdown:
+		t.Stop()
+		return
+	}
 }

internal/internal_test.go

@@ -1,44 +1,156 @@
 package internal
 
-import "testing"
+import (
+	"os/exec"
+	"testing"
+	"time"
 
-func testGlobMatch(t *testing.T, pattern, subj string) {
-	if !Glob(pattern, subj) {
-		t.Errorf("%s should match %s", pattern, subj)
+	"github.com/stretchr/testify/assert"
+)
+
+type SnakeTest struct {
+	input  string
+	output string
+}
+
+var tests = []SnakeTest{
+	{"a", "a"},
+	{"snake", "snake"},
+	{"A", "a"},
+	{"ID", "id"},
+	{"MOTD", "motd"},
+	{"Snake", "snake"},
+	{"SnakeTest", "snake_test"},
+	{"APIResponse", "api_response"},
+	{"SnakeID", "snake_id"},
+	{"SnakeIDGoogle", "snake_id_google"},
+	{"LinuxMOTD", "linux_motd"},
+	{"OMGWTFBBQ", "omgwtfbbq"},
+	{"omg_wtf_bbq", "omg_wtf_bbq"},
+}
+
+func TestSnakeCase(t *testing.T) {
+	for _, test := range tests {
+		if SnakeCase(test.input) != test.output {
+			t.Errorf(`SnakeCase("%s"), wanted "%s", got \%s"`, test.input, test.output, SnakeCase(test.input))
+		}
 	}
 }
 
-func testGlobNoMatch(t *testing.T, pattern, subj string) {
-	if Glob(pattern, subj) {
-		t.Errorf("%s should not match %s", pattern, subj)
+var (
+	sleepbin, _ = exec.LookPath("sleep")
+	echobin, _  = exec.LookPath("echo")
+)
+
+func TestRunTimeout(t *testing.T) {
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
 	}
+	cmd := exec.Command(sleepbin, "10")
+	start := time.Now()
+	err := RunTimeout(cmd, time.Millisecond*20)
+	elapsed := time.Since(start)
+
+	assert.Equal(t, TimeoutErr, err)
+	// Verify that command gets killed in 20ms, with some breathing room
+	assert.True(t, elapsed < time.Millisecond*75)
 }
 
-func TestEmptyPattern(t *testing.T) {
-	testGlobMatch(t, "", "")
-	testGlobNoMatch(t, "", "test")
-}
-
-func TestPatternWithoutGlobs(t *testing.T) {
-	testGlobMatch(t, "test", "test")
-}
-
-func TestGlob(t *testing.T) {
-	for _, pattern := range []string{
-		"*test",           // Leading glob
-		"this*",           // Trailing glob
-		"*is*a*",          // Lots of globs
-		"**test**",        // Double glob characters
-		"**is**a***test*", // Varying number of globs
-	} {
-		testGlobMatch(t, pattern, "this_is_a_test")
+func TestCombinedOutputTimeout(t *testing.T) {
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
 	}
+	cmd := exec.Command(sleepbin, "10")
+	start := time.Now()
+	_, err := CombinedOutputTimeout(cmd, time.Millisecond*20)
+	elapsed := time.Since(start)
 
-	for _, pattern := range []string{
-		"test*", // Implicit substring match should fail
-		"*is",   // Partial match should fail
-		"*no*",  // Globs without a match between them should fail
-	} {
-		testGlobNoMatch(t, pattern, "this_is_a_test")
-	}
+	assert.Equal(t, TimeoutErr, err)
+	// Verify that command gets killed in 20ms, with some breathing room
+	assert.True(t, elapsed < time.Millisecond*75)
+}
+
+func TestCombinedOutput(t *testing.T) {
+	if echobin == "" {
+		t.Skip("'echo' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(echobin, "foo")
+	out, err := CombinedOutputTimeout(cmd, time.Second)
+
+	assert.NoError(t, err)
+	assert.Equal(t, "foo\n", string(out))
+}
+
+// test that CombinedOutputTimeout and exec.Cmd.CombinedOutput return
+// the same output from a failed command.
+func TestCombinedOutputError(t *testing.T) {
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(sleepbin, "foo")
+	expected, err := cmd.CombinedOutput()
+
+	cmd2 := exec.Command(sleepbin, "foo")
+	actual, err := CombinedOutputTimeout(cmd2, time.Second)
+
+	assert.Error(t, err)
+	assert.Equal(t, expected, actual)
+}
+
+func TestRunError(t *testing.T) {
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(sleepbin, "foo")
+	err := RunTimeout(cmd, time.Second)
+
+	assert.Error(t, err)
+}
+
+func TestRandomSleep(t *testing.T) {
+	// test that zero max returns immediately
+	s := time.Now()
+	RandomSleep(time.Duration(0), make(chan struct{}))
+	elapsed := time.Since(s)
+	assert.True(t, elapsed < time.Millisecond)
+
+	// test that max sleep is respected
+	s = time.Now()
+	RandomSleep(time.Millisecond*50, make(chan struct{}))
+	elapsed = time.Since(s)
+	assert.True(t, elapsed < time.Millisecond*100)
+
+	// test that shutdown is respected
+	s = time.Now()
+	shutdown := make(chan struct{})
+	go func() {
+		time.Sleep(time.Millisecond * 100)
+		close(shutdown)
+	}()
+	RandomSleep(time.Second, shutdown)
+	elapsed = time.Since(s)
+	assert.True(t, elapsed < time.Millisecond*150)
+}
+
+func TestDuration(t *testing.T) {
+	var d Duration
+
+	d.UnmarshalTOML([]byte(`"1s"`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`1s`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`'1s'`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`10`))
+	assert.Equal(t, 10*time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`1.5`))
+	assert.Equal(t, time.Second, d.Duration)
 }

internal/limiter/limiter.go

@@ -0,0 +1,59 @@
+package limiter
+
+import (
+	"sync"
+	"time"
+)
+
+// NewRateLimiter returns a rate limiter that will will emit from the C
+// channel only 'n' times every 'rate' seconds.
+func NewRateLimiter(n int, rate time.Duration) *rateLimiter {
+	r := &rateLimiter{
+		C:        make(chan bool),
+		rate:     rate,
+		n:        n,
+		shutdown: make(chan bool),
+	}
+	r.wg.Add(1)
+	go r.limiter()
+	return r
+}
+
+type rateLimiter struct {
+	C    chan bool
+	rate time.Duration
+	n    int
+
+	shutdown chan bool
+	wg       sync.WaitGroup
+}
+
+func (r *rateLimiter) Stop() {
+	close(r.shutdown)
+	r.wg.Wait()
+	close(r.C)
+}
+
+func (r *rateLimiter) limiter() {
+	defer r.wg.Done()
+	ticker := time.NewTicker(r.rate)
+	defer ticker.Stop()
+	counter := 0
+	for {
+		select {
+		case <-r.shutdown:
+			return
+		case <-ticker.C:
+			counter = 0
+		default:
+			if counter < r.n {
+				select {
+				case r.C <- true:
+					counter++
+				case <-r.shutdown:
+					return
+				}
+			}
+		}
+	}
+}

internal/limiter/limiter_test.go

@@ -0,0 +1,54 @@
+package limiter
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRateLimiter(t *testing.T) {
+	r := NewRateLimiter(5, time.Second)
+	ticker := time.NewTicker(time.Millisecond * 75)
+
+	// test that we can only get 5 receives from the rate limiter
+	counter := 0
+outer:
+	for {
+		select {
+		case <-r.C:
+			counter++
+		case <-ticker.C:
+			break outer
+		}
+	}
+
+	assert.Equal(t, 5, counter)
+	r.Stop()
+	// verify that the Stop function closes the channel.
+	_, ok := <-r.C
+	assert.False(t, ok)
+}
+
+func TestRateLimiterMultipleIterations(t *testing.T) {
+	r := NewRateLimiter(5, time.Millisecond*50)
+	ticker := time.NewTicker(time.Millisecond * 250)
+
+	// test that we can get 15 receives from the rate limiter
+	counter := 0
+outer:
+	for {
+		select {
+		case <-ticker.C:
+			break outer
+		case <-r.C:
+			counter++
+		}
+	}
+
+	assert.True(t, counter > 10)
+	r.Stop()
+	// verify that the Stop function closes the channel.
+	_, ok := <-r.C
+	assert.False(t, ok)
+}

internal/models/filter.go

@@ -0,0 +1,227 @@
+package models
+
+import (
+	"fmt"
+
+	"github.com/influxdata/telegraf/filter"
+)
+
+// TagFilter is the name of a tag, and the values on which to filter
+type TagFilter struct {
+	Name   string
+	Filter []string
+	filter filter.Filter
+}
+
+// Filter containing drop/pass and tagdrop/tagpass rules
+type Filter struct {
+	NameDrop []string
+	nameDrop filter.Filter
+	NamePass []string
+	namePass filter.Filter
+
+	FieldDrop []string
+	fieldDrop filter.Filter
+	FieldPass []string
+	fieldPass filter.Filter
+
+	TagDrop []TagFilter
+	TagPass []TagFilter
+
+	TagExclude []string
+	tagExclude filter.Filter
+	TagInclude []string
+	tagInclude filter.Filter
+
+	isActive bool
+}
+
+// Compile all Filter lists into filter.Filter objects.
+func (f *Filter) Compile() error {
+	if len(f.NameDrop) == 0 &&
+		len(f.NamePass) == 0 &&
+		len(f.FieldDrop) == 0 &&
+		len(f.FieldPass) == 0 &&
+		len(f.TagInclude) == 0 &&
+		len(f.TagExclude) == 0 &&
+		len(f.TagPass) == 0 &&
+		len(f.TagDrop) == 0 {
+		return nil
+	}
+
+	f.isActive = true
+	var err error
+	f.nameDrop, err = filter.Compile(f.NameDrop)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'namedrop', %s", err)
+	}
+	f.namePass, err = filter.Compile(f.NamePass)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'namepass', %s", err)
+	}
+
+	f.fieldDrop, err = filter.Compile(f.FieldDrop)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'fielddrop', %s", err)
+	}
+	f.fieldPass, err = filter.Compile(f.FieldPass)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'fieldpass', %s", err)
+	}
+
+	f.tagExclude, err = filter.Compile(f.TagExclude)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'tagexclude', %s", err)
+	}
+	f.tagInclude, err = filter.Compile(f.TagInclude)
+	if err != nil {
+		return fmt.Errorf("Error compiling 'taginclude', %s", err)
+	}
+
+	for i, _ := range f.TagDrop {
+		f.TagDrop[i].filter, err = filter.Compile(f.TagDrop[i].Filter)
+		if err != nil {
+			return fmt.Errorf("Error compiling 'tagdrop', %s", err)
+		}
+	}
+	for i, _ := range f.TagPass {
+		f.TagPass[i].filter, err = filter.Compile(f.TagPass[i].Filter)
+		if err != nil {
+			return fmt.Errorf("Error compiling 'tagpass', %s", err)
+		}
+	}
+	return nil
+}
+
+// Apply applies the filter to the given measurement name, fields map, and
+// tags map. It will return false if the metric should be "filtered out", and
+// true if the metric should "pass".
+// It will modify tags & fields in-place if they need to be deleted.
+func (f *Filter) Apply(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+) bool {
+	if !f.isActive {
+		return true
+	}
+
+	// check if the measurement name should pass
+	if !f.shouldNamePass(measurement) {
+		return false
+	}
+
+	// check if the tags should pass
+	if !f.shouldTagsPass(tags) {
+		return false
+	}
+
+	// filter fields
+	for fieldkey, _ := range fields {
+		if !f.shouldFieldPass(fieldkey) {
+			delete(fields, fieldkey)
+		}
+	}
+	if len(fields) == 0 {
+		return false
+	}
+
+	// filter tags
+	f.filterTags(tags)
+
+	return true
+}
+
+func (f *Filter) IsActive() bool {
+	return f.isActive
+}
+
+// shouldNamePass returns true if the metric should pass, false if should drop
+// based on the drop/pass filter parameters
+func (f *Filter) shouldNamePass(key string) bool {
+	if f.namePass != nil {
+		if f.namePass.Match(key) {
+			return true
+		}
+		return false
+	}
+
+	if f.nameDrop != nil {
+		if f.nameDrop.Match(key) {
+			return false
+		}
+	}
+	return true
+}
+
+// shouldFieldPass returns true if the metric should pass, false if should drop
+// based on the drop/pass filter parameters
+func (f *Filter) shouldFieldPass(key string) bool {
+	if f.fieldPass != nil {
+		if f.fieldPass.Match(key) {
+			return true
+		}
+		return false
+	}
+
+	if f.fieldDrop != nil {
+		if f.fieldDrop.Match(key) {
+			return false
+		}
+	}
+	return true
+}
+
+// shouldTagsPass returns true if the metric should pass, false if should drop
+// based on the tagdrop/tagpass filter parameters
+func (f *Filter) shouldTagsPass(tags map[string]string) bool {
+	if f.TagPass != nil {
+		for _, pat := range f.TagPass {
+			if pat.filter == nil {
+				continue
+			}
+			if tagval, ok := tags[pat.Name]; ok {
+				if pat.filter.Match(tagval) {
+					return true
+				}
+			}
+		}
+		return false
+	}
+
+	if f.TagDrop != nil {
+		for _, pat := range f.TagDrop {
+			if pat.filter == nil {
+				continue
+			}
+			if tagval, ok := tags[pat.Name]; ok {
+				if pat.filter.Match(tagval) {
+					return false
+				}
+			}
+		}
+		return true
+	}
+
+	return true
+}
+
+// Apply TagInclude and TagExclude filters.
+// modifies the tags map in-place.
+func (f *Filter) filterTags(tags map[string]string) {
+	if f.tagInclude != nil {
+		for k, _ := range tags {
+			if !f.tagInclude.Match(k) {
+				delete(tags, k)
+			}
+		}
+	}
+
+	if f.tagExclude != nil {
+		for k, _ := range tags {
+			if f.tagExclude.Match(k) {
+				delete(tags, k)
+			}
+		}
+	}
+}

internal/models/filter_test.go

@@ -0,0 +1,359 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestFilter_ApplyEmpty(t *testing.T) {
+	f := Filter{}
+	require.NoError(t, f.Compile())
+	assert.False(t, f.IsActive())
+
+	assert.True(t, f.Apply("m", map[string]interface{}{"value": int64(1)}, map[string]string{}))
+}
+
+func TestFilter_ApplyTagsDontPass(t *testing.T) {
+	filters := []TagFilter{
+		TagFilter{
+			Name:   "cpu",
+			Filter: []string{"cpu-*"},
+		},
+	}
+	f := Filter{
+		TagDrop: filters,
+	}
+	require.NoError(t, f.Compile())
+	require.NoError(t, f.Compile())
+	assert.True(t, f.IsActive())
+
+	assert.False(t, f.Apply("m",
+		map[string]interface{}{"value": int64(1)},
+		map[string]string{"cpu": "cpu-total"}))
+}
+
+func TestFilter_ApplyDeleteFields(t *testing.T) {
+	f := Filter{
+		FieldDrop: []string{"value"},
+	}
+	require.NoError(t, f.Compile())
+	require.NoError(t, f.Compile())
+	assert.True(t, f.IsActive())
+
+	fields := map[string]interface{}{"value": int64(1), "value2": int64(2)}
+	assert.True(t, f.Apply("m", fields, nil))
+	assert.Equal(t, map[string]interface{}{"value2": int64(2)}, fields)
+}
+
+func TestFilter_ApplyDeleteAllFields(t *testing.T) {
+	f := Filter{
+		FieldDrop: []string{"value*"},
+	}
+	require.NoError(t, f.Compile())
+	require.NoError(t, f.Compile())
+	assert.True(t, f.IsActive())
+
+	fields := map[string]interface{}{"value": int64(1), "value2": int64(2)}
+	assert.False(t, f.Apply("m", fields, nil))
+}
+
+func TestFilter_Empty(t *testing.T) {
+	f := Filter{}
+
+	measurements := []string{
+		"foo",
+		"bar",
+		"barfoo",
+		"foo_bar",
+		"foo.bar",
+		"foo-bar",
+		"supercalifradjulisticexpialidocious",
+	}
+
+	for _, measurement := range measurements {
+		if !f.shouldFieldPass(measurement) {
+			t.Errorf("Expected measurement %s to pass", measurement)
+		}
+	}
+}
+
+func TestFilter_NamePass(t *testing.T) {
+	f := Filter{
+		NamePass: []string{"foo*", "cpu_usage_idle"},
+	}
+	require.NoError(t, f.Compile())
+
+	passes := []string{
+		"foo",
+		"foo_bar",
+		"foo.bar",
+		"foo-bar",
+		"cpu_usage_idle",
+	}
+
+	drops := []string{
+		"bar",
+		"barfoo",
+		"bar_foo",
+		"cpu_usage_busy",
+	}
+
+	for _, measurement := range passes {
+		if !f.shouldNamePass(measurement) {
+			t.Errorf("Expected measurement %s to pass", measurement)
+		}
+	}
+
+	for _, measurement := range drops {
+		if f.shouldNamePass(measurement) {
+			t.Errorf("Expected measurement %s to drop", measurement)
+		}
+	}
+}
+
+func TestFilter_NameDrop(t *testing.T) {
+	f := Filter{
+		NameDrop: []string{"foo*", "cpu_usage_idle"},
+	}
+	require.NoError(t, f.Compile())
+
+	drops := []string{
+		"foo",
+		"foo_bar",
+		"foo.bar",
+		"foo-bar",
+		"cpu_usage_idle",
+	}
+
+	passes := []string{
+		"bar",
+		"barfoo",
+		"bar_foo",
+		"cpu_usage_busy",
+	}
+
+	for _, measurement := range passes {
+		if !f.shouldNamePass(measurement) {
+			t.Errorf("Expected measurement %s to pass", measurement)
+		}
+	}
+
+	for _, measurement := range drops {
+		if f.shouldNamePass(measurement) {
+			t.Errorf("Expected measurement %s to drop", measurement)
+		}
+	}
+}
+
+func TestFilter_FieldPass(t *testing.T) {
+	f := Filter{
+		FieldPass: []string{"foo*", "cpu_usage_idle"},
+	}
+	require.NoError(t, f.Compile())
+
+	passes := []string{
+		"foo",
+		"foo_bar",
+		"foo.bar",
+		"foo-bar",
+		"cpu_usage_idle",
+	}
+
+	drops := []string{
+		"bar",
+		"barfoo",
+		"bar_foo",
+		"cpu_usage_busy",
+	}
+
+	for _, measurement := range passes {
+		if !f.shouldFieldPass(measurement) {
+			t.Errorf("Expected measurement %s to pass", measurement)
+		}
+	}
+
+	for _, measurement := range drops {
+		if f.shouldFieldPass(measurement) {
+			t.Errorf("Expected measurement %s to drop", measurement)
+		}
+	}
+}
+
+func TestFilter_FieldDrop(t *testing.T) {
+	f := Filter{
+		FieldDrop: []string{"foo*", "cpu_usage_idle"},
+	}
+	require.NoError(t, f.Compile())
+
+	drops := []string{
+		"foo",
+		"foo_bar",
+		"foo.bar",
+		"foo-bar",
+		"cpu_usage_idle",
+	}
+
+	passes := []string{
+		"bar",
+		"barfoo",
+		"bar_foo",
+		"cpu_usage_busy",
+	}
+
+	for _, measurement := range passes {
+		if !f.shouldFieldPass(measurement) {
+			t.Errorf("Expected measurement %s to pass", measurement)
+		}
+	}
+
+	for _, measurement := range drops {
+		if f.shouldFieldPass(measurement) {
+			t.Errorf("Expected measurement %s to drop", measurement)
+		}
+	}
+}
+
+func TestFilter_TagPass(t *testing.T) {
+	filters := []TagFilter{
+		TagFilter{
+			Name:   "cpu",
+			Filter: []string{"cpu-*"},
+		},
+		TagFilter{
+			Name:   "mem",
+			Filter: []string{"mem_free"},
+		}}
+	f := Filter{
+		TagPass: filters,
+	}
+	require.NoError(t, f.Compile())
+
+	passes := []map[string]string{
+		{"cpu": "cpu-total"},
+		{"cpu": "cpu-0"},
+		{"cpu": "cpu-1"},
+		{"cpu": "cpu-2"},
+		{"mem": "mem_free"},
+	}
+
+	drops := []map[string]string{
+		{"cpu": "cputotal"},
+		{"cpu": "cpu0"},
+		{"cpu": "cpu1"},
+		{"cpu": "cpu2"},
+		{"mem": "mem_used"},
+	}
+
+	for _, tags := range passes {
+		if !f.shouldTagsPass(tags) {
+			t.Errorf("Expected tags %v to pass", tags)
+		}
+	}
+
+	for _, tags := range drops {
+		if f.shouldTagsPass(tags) {
+			t.Errorf("Expected tags %v to drop", tags)
+		}
+	}
+}
+
+func TestFilter_TagDrop(t *testing.T) {
+	filters := []TagFilter{
+		TagFilter{
+			Name:   "cpu",
+			Filter: []string{"cpu-*"},
+		},
+		TagFilter{
+			Name:   "mem",
+			Filter: []string{"mem_free"},
+		}}
+	f := Filter{
+		TagDrop: filters,
+	}
+	require.NoError(t, f.Compile())
+
+	drops := []map[string]string{
+		{"cpu": "cpu-total"},
+		{"cpu": "cpu-0"},
+		{"cpu": "cpu-1"},
+		{"cpu": "cpu-2"},
+		{"mem": "mem_free"},
+	}
+
+	passes := []map[string]string{
+		{"cpu": "cputotal"},
+		{"cpu": "cpu0"},
+		{"cpu": "cpu1"},
+		{"cpu": "cpu2"},
+		{"mem": "mem_used"},
+	}
+
+	for _, tags := range passes {
+		if !f.shouldTagsPass(tags) {
+			t.Errorf("Expected tags %v to pass", tags)
+		}
+	}
+
+	for _, tags := range drops {
+		if f.shouldTagsPass(tags) {
+			t.Errorf("Expected tags %v to drop", tags)
+		}
+	}
+}
+
+func TestFilter_FilterTagsNoMatches(t *testing.T) {
+	pretags := map[string]string{
+		"host":  "localhost",
+		"mytag": "foobar",
+	}
+	f := Filter{
+		TagExclude: []string{"nomatch"},
+	}
+	require.NoError(t, f.Compile())
+
+	f.filterTags(pretags)
+	assert.Equal(t, map[string]string{
+		"host":  "localhost",
+		"mytag": "foobar",
+	}, pretags)
+
+	f = Filter{
+		TagInclude: []string{"nomatch"},
+	}
+	require.NoError(t, f.Compile())
+
+	f.filterTags(pretags)
+	assert.Equal(t, map[string]string{}, pretags)
+}
+
+func TestFilter_FilterTagsMatches(t *testing.T) {
+	pretags := map[string]string{
+		"host":  "localhost",
+		"mytag": "foobar",
+	}
+	f := Filter{
+		TagExclude: []string{"ho*"},
+	}
+	require.NoError(t, f.Compile())
+
+	f.filterTags(pretags)
+	assert.Equal(t, map[string]string{
+		"mytag": "foobar",
+	}, pretags)
+
+	pretags = map[string]string{
+		"host":  "localhost",
+		"mytag": "foobar",
+	}
+	f = Filter{
+		TagInclude: []string{"my*"},
+	}
+	require.NoError(t, f.Compile())
+
+	f.filterTags(pretags)
+	assert.Equal(t, map[string]string{
+		"mytag": "foobar",
+	}, pretags)
+}

internal/models/makemetric.go

@@ -0,0 +1,143 @@
+package models
+
+import (
+	"log"
+	"math"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/metric"
+)
+
+// makemetric is used by both RunningAggregator & RunningInput
+// to make metrics.
+//   nameOverride: override the name of the measurement being made.
+//   namePrefix:   add this prefix to each measurement name.
+//   nameSuffix:   add this suffix to each measurement name.
+//   pluginTags:   these are tags that are specific to this plugin.
+//   daemonTags:   these are daemon-wide global tags, and get applied after pluginTags.
+//   filter:       this is a filter to apply to each metric being made.
+//   applyFilter:  if false, the above filter is not applied to each metric.
+//                 This is used by Aggregators, because aggregators use filters
+//                 on incoming metrics instead of on created metrics.
+// TODO refactor this to not have such a huge func signature.
+func makemetric(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	nameOverride string,
+	namePrefix string,
+	nameSuffix string,
+	pluginTags map[string]string,
+	daemonTags map[string]string,
+	filter Filter,
+	applyFilter bool,
+	mType telegraf.ValueType,
+	t time.Time,
+) telegraf.Metric {
+	if len(fields) == 0 || len(measurement) == 0 {
+		return nil
+	}
+	if tags == nil {
+		tags = make(map[string]string)
+	}
+
+	// Override measurement name if set
+	if len(nameOverride) != 0 {
+		measurement = nameOverride
+	}
+	// Apply measurement prefix and suffix if set
+	if len(namePrefix) != 0 {
+		measurement = namePrefix + measurement
+	}
+	if len(nameSuffix) != 0 {
+		measurement = measurement + nameSuffix
+	}
+
+	// Apply plugin-wide tags if set
+	for k, v := range pluginTags {
+		if _, ok := tags[k]; !ok {
+			tags[k] = v
+		}
+	}
+	// Apply daemon-wide tags if set
+	for k, v := range daemonTags {
+		if _, ok := tags[k]; !ok {
+			tags[k] = v
+		}
+	}
+
+	// Apply the metric filter(s)
+	// for aggregators, the filter does not get applied when the metric is made.
+	// instead, the filter is applied to metric incoming into the plugin.
+	//   ie, it gets applied in the RunningAggregator.Apply function.
+	if applyFilter {
+		if ok := filter.Apply(measurement, fields, tags); !ok {
+			return nil
+		}
+	}
+
+	for k, v := range fields {
+		// Validate uint64 and float64 fields
+		// convert all int & uint types to int64
+		switch val := v.(type) {
+		case nil:
+			// delete nil fields
+			delete(fields, k)
+		case uint:
+			fields[k] = int64(val)
+			continue
+		case uint8:
+			fields[k] = int64(val)
+			continue
+		case uint16:
+			fields[k] = int64(val)
+			continue
+		case uint32:
+			fields[k] = int64(val)
+			continue
+		case int:
+			fields[k] = int64(val)
+			continue
+		case int8:
+			fields[k] = int64(val)
+			continue
+		case int16:
+			fields[k] = int64(val)
+			continue
+		case int32:
+			fields[k] = int64(val)
+			continue
+		case uint64:
+			// InfluxDB does not support writing uint64
+			if val < uint64(9223372036854775808) {
+				fields[k] = int64(val)
+			} else {
+				fields[k] = int64(9223372036854775807)
+			}
+			continue
+		case float32:
+			fields[k] = float64(val)
+			continue
+		case float64:
+			// NaNs are invalid values in influxdb, skip measurement
+			if math.IsNaN(val) || math.IsInf(val, 0) {
+				log.Printf("D! Measurement [%s] field [%s] has a NaN or Inf "+
+					"field, skipping",
+					measurement, k)
+				delete(fields, k)
+				continue
+			}
+		default:
+			fields[k] = v
+		}
+	}
+
+	m, err := metric.New(measurement, tags, fields, t, mType)
+	if err != nil {
+		log.Printf("Error adding point [%s]: %s\n", measurement, err.Error())
+		return nil
+	}
+
+	return m
+}

internal/models/running_aggregator.go

@@ -0,0 +1,166 @@
+package models
+
+import (
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/metric"
+)
+
+type RunningAggregator struct {
+	a      telegraf.Aggregator
+	Config *AggregatorConfig
+
+	metrics chan telegraf.Metric
+
+	periodStart time.Time
+	periodEnd   time.Time
+}
+
+func NewRunningAggregator(
+	a telegraf.Aggregator,
+	conf *AggregatorConfig,
+) *RunningAggregator {
+	return &RunningAggregator{
+		a:       a,
+		Config:  conf,
+		metrics: make(chan telegraf.Metric, 100),
+	}
+}
+
+// AggregatorConfig containing configuration parameters for the running
+// aggregator plugin.
+type AggregatorConfig struct {
+	Name string
+
+	DropOriginal      bool
+	NameOverride      string
+	MeasurementPrefix string
+	MeasurementSuffix string
+	Tags              map[string]string
+	Filter            Filter
+
+	Period time.Duration
+	Delay  time.Duration
+}
+
+func (r *RunningAggregator) Name() string {
+	return "aggregators." + r.Config.Name
+}
+
+func (r *RunningAggregator) MakeMetric(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	mType telegraf.ValueType,
+	t time.Time,
+) telegraf.Metric {
+	m := makemetric(
+		measurement,
+		fields,
+		tags,
+		r.Config.NameOverride,
+		r.Config.MeasurementPrefix,
+		r.Config.MeasurementSuffix,
+		r.Config.Tags,
+		nil,
+		r.Config.Filter,
+		false,
+		mType,
+		t,
+	)
+
+	if m != nil {
+		m.SetAggregate(true)
+	}
+
+	return m
+}
+
+// Add applies the given metric to the aggregator.
+// Before applying to the plugin, it will run any defined filters on the metric.
+// Apply returns true if the original metric should be dropped.
+func (r *RunningAggregator) Add(in telegraf.Metric) bool {
+	if r.Config.Filter.IsActive() {
+		// check if the aggregator should apply this metric
+		name := in.Name()
+		fields := in.Fields()
+		tags := in.Tags()
+		t := in.Time()
+		if ok := r.Config.Filter.Apply(name, fields, tags); !ok {
+			// aggregator should not apply this metric
+			return false
+		}
+
+		in, _ = metric.New(name, tags, fields, t)
+	}
+
+	r.metrics <- in
+	return r.Config.DropOriginal
+}
+func (r *RunningAggregator) add(in telegraf.Metric) {
+	r.a.Add(in)
+}
+
+func (r *RunningAggregator) push(acc telegraf.Accumulator) {
+	r.a.Push(acc)
+}
+
+func (r *RunningAggregator) reset() {
+	r.a.Reset()
+}
+
+// Run runs the running aggregator, listens for incoming metrics, and waits
+// for period ticks to tell it when to push and reset the aggregator.
+func (r *RunningAggregator) Run(
+	acc telegraf.Accumulator,
+	shutdown chan struct{},
+) {
+	// The start of the period is truncated to the nearest second.
+	//
+	// Every metric then gets it's timestamp checked and is dropped if it
+	// is not within:
+	//
+	//   start < t < end + truncation + delay
+	//
+	// So if we start at now = 00:00.2 with a 10s period and 0.3s delay:
+	//   now = 00:00.2
+	//   start = 00:00
+	//   truncation = 00:00.2
+	//   end = 00:10
+	// 1st interval: 00:00 - 00:10.5
+	// 2nd interval: 00:10 - 00:20.5
+	// etc.
+	//
+	now := time.Now()
+	r.periodStart = now.Truncate(time.Second)
+	truncation := now.Sub(r.periodStart)
+	r.periodEnd = r.periodStart.Add(r.Config.Period)
+	time.Sleep(r.Config.Delay)
+	periodT := time.NewTicker(r.Config.Period)
+	defer periodT.Stop()
+
+	for {
+		select {
+		case <-shutdown:
+			if len(r.metrics) > 0 {
+				// wait until metrics are flushed before exiting
+				continue
+			}
+			return
+		case m := <-r.metrics:
+			if m.Time().Before(r.periodStart) ||
+				m.Time().After(r.periodEnd.Add(truncation).Add(r.Config.Delay)) {
+				// the metric is outside the current aggregation period, so
+				// skip it.
+				continue
+			}
+			r.add(m)
+		case <-periodT.C:
+			r.periodStart = r.periodEnd
+			r.periodEnd = r.periodStart.Add(r.Config.Period)
+			r.push(acc)
+			r.reset()
+		}
+	}
+}

internal/models/running_aggregator_test.go

@@ -0,0 +1,256 @@
+package models
+
+import (
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/testutil"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAdd(t *testing.T) {
+	a := &TestAggregator{}
+	ra := NewRunningAggregator(a, &AggregatorConfig{
+		Name: "TestRunningAggregator",
+		Filter: Filter{
+			NamePass: []string{"*"},
+		},
+		Period: time.Millisecond * 500,
+	})
+	assert.NoError(t, ra.Config.Filter.Compile())
+	acc := testutil.Accumulator{}
+	go ra.Run(&acc, make(chan struct{}))
+
+	m := ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now().Add(time.Millisecond*150),
+	)
+	assert.False(t, ra.Add(m))
+
+	for {
+		time.Sleep(time.Millisecond)
+		if atomic.LoadInt64(&a.sum) > 0 {
+			break
+		}
+	}
+	assert.Equal(t, int64(101), atomic.LoadInt64(&a.sum))
+}
+
+func TestAddMetricsOutsideCurrentPeriod(t *testing.T) {
+	a := &TestAggregator{}
+	ra := NewRunningAggregator(a, &AggregatorConfig{
+		Name: "TestRunningAggregator",
+		Filter: Filter{
+			NamePass: []string{"*"},
+		},
+		Period: time.Millisecond * 500,
+	})
+	assert.NoError(t, ra.Config.Filter.Compile())
+	acc := testutil.Accumulator{}
+	go ra.Run(&acc, make(chan struct{}))
+
+	// metric before current period
+	m := ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now().Add(-time.Hour),
+	)
+	assert.False(t, ra.Add(m))
+
+	// metric after current period
+	m = ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now().Add(time.Hour),
+	)
+	assert.False(t, ra.Add(m))
+
+	// "now" metric
+	m = ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now().Add(time.Millisecond*50),
+	)
+	assert.False(t, ra.Add(m))
+
+	for {
+		time.Sleep(time.Millisecond)
+		if atomic.LoadInt64(&a.sum) > 0 {
+			break
+		}
+	}
+	assert.Equal(t, int64(101), atomic.LoadInt64(&a.sum))
+}
+
+func TestAddAndPushOnePeriod(t *testing.T) {
+	a := &TestAggregator{}
+	ra := NewRunningAggregator(a, &AggregatorConfig{
+		Name: "TestRunningAggregator",
+		Filter: Filter{
+			NamePass: []string{"*"},
+		},
+		Period: time.Millisecond * 500,
+	})
+	assert.NoError(t, ra.Config.Filter.Compile())
+	acc := testutil.Accumulator{}
+	shutdown := make(chan struct{})
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		ra.Run(&acc, shutdown)
+	}()
+
+	m := ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now().Add(time.Millisecond*100),
+	)
+	assert.False(t, ra.Add(m))
+
+	for {
+		time.Sleep(time.Millisecond)
+		if acc.NMetrics() > 0 {
+			break
+		}
+	}
+	acc.AssertContainsFields(t, "TestMetric", map[string]interface{}{"sum": int64(101)})
+
+	close(shutdown)
+	wg.Wait()
+}
+
+func TestAddDropOriginal(t *testing.T) {
+	ra := NewRunningAggregator(&TestAggregator{}, &AggregatorConfig{
+		Name: "TestRunningAggregator",
+		Filter: Filter{
+			NamePass: []string{"RI*"},
+		},
+		DropOriginal: true,
+	})
+	assert.NoError(t, ra.Config.Filter.Compile())
+
+	m := ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now(),
+	)
+	assert.True(t, ra.Add(m))
+
+	// this metric name doesn't match the filter, so Add will return false
+	m2 := ra.MakeMetric(
+		"foobar",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		time.Now(),
+	)
+	assert.False(t, ra.Add(m2))
+}
+
+// make an untyped, counter, & gauge metric
+func TestMakeMetricA(t *testing.T) {
+	now := time.Now()
+	ra := NewRunningAggregator(&TestAggregator{}, &AggregatorConfig{
+		Name: "TestRunningAggregator",
+	})
+	assert.Equal(t, "aggregators.TestRunningAggregator", ra.Name())
+
+	m := ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Untyped,
+	)
+
+	m = ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Counter,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Counter,
+	)
+
+	m = ra.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Gauge,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Gauge,
+	)
+}
+
+type TestAggregator struct {
+	sum int64
+}
+
+func (t *TestAggregator) Description() string  { return "" }
+func (t *TestAggregator) SampleConfig() string { return "" }
+func (t *TestAggregator) Reset() {
+	atomic.StoreInt64(&t.sum, 0)
+}
+
+func (t *TestAggregator) Push(acc telegraf.Accumulator) {
+	acc.AddFields("TestMetric",
+		map[string]interface{}{"sum": t.sum},
+		map[string]string{},
+	)
+}
+
+func (t *TestAggregator) Add(in telegraf.Metric) {
+	for _, v := range in.Fields() {
+		if vi, ok := v.(int64); ok {
+			atomic.AddInt64(&t.sum, vi)
+		}
+	}
+}

internal/models/running_input.go

@@ -0,0 +1,96 @@
+package models
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+var GlobalMetricsGathered = selfstat.Register("agent", "metrics_gathered", map[string]string{})
+
+type RunningInput struct {
+	Input  telegraf.Input
+	Config *InputConfig
+
+	trace       bool
+	defaultTags map[string]string
+
+	MetricsGathered selfstat.Stat
+}
+
+func NewRunningInput(
+	input telegraf.Input,
+	config *InputConfig,
+) *RunningInput {
+	return &RunningInput{
+		Input:  input,
+		Config: config,
+		MetricsGathered: selfstat.Register(
+			"gather",
+			"metrics_gathered",
+			map[string]string{"input": config.Name},
+		),
+	}
+}
+
+// InputConfig containing a name, interval, and filter
+type InputConfig struct {
+	Name              string
+	NameOverride      string
+	MeasurementPrefix string
+	MeasurementSuffix string
+	Tags              map[string]string
+	Filter            Filter
+	Interval          time.Duration
+}
+
+func (r *RunningInput) Name() string {
+	return "inputs." + r.Config.Name
+}
+
+// MakeMetric either returns a metric, or returns nil if the metric doesn't
+// need to be created (because of filtering, an error, etc.)
+func (r *RunningInput) MakeMetric(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	mType telegraf.ValueType,
+	t time.Time,
+) telegraf.Metric {
+	m := makemetric(
+		measurement,
+		fields,
+		tags,
+		r.Config.NameOverride,
+		r.Config.MeasurementPrefix,
+		r.Config.MeasurementSuffix,
+		r.Config.Tags,
+		r.defaultTags,
+		r.Config.Filter,
+		true,
+		mType,
+		t,
+	)
+
+	if r.trace && m != nil {
+		fmt.Print("> " + m.String())
+	}
+
+	r.MetricsGathered.Incr(1)
+	GlobalMetricsGathered.Incr(1)
+	return m
+}
+
+func (r *RunningInput) Trace() bool {
+	return r.trace
+}
+
+func (r *RunningInput) SetTrace(trace bool) {
+	r.trace = trace
+}
+
+func (r *RunningInput) SetDefaultTags(tags map[string]string) {
+	r.defaultTags = tags
+}

internal/models/running_input_test.go

@@ -0,0 +1,339 @@
+package models
+
+import (
+	"fmt"
+	"math"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMakeMetricNoFields(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Nil(t, m)
+}
+
+// nil fields should get dropped
+func TestMakeMetricNilFields(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{
+			"value": int(101),
+			"nil":   nil,
+		},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+// make an untyped, counter, & gauge metric
+func TestMakeMetric(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+	assert.Equal(t, "inputs.TestRunningInput", ri.Name())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Untyped,
+	)
+
+	m = ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Counter,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Counter,
+	)
+
+	m = ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Gauge,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+	assert.Equal(
+		t,
+		m.Type(),
+		telegraf.Gauge,
+	)
+}
+
+func TestMakeMetricWithPluginTags(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+		Tags: map[string]string{
+			"foo": "bar",
+		},
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		nil,
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest,foo=bar value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+func TestMakeMetricFilteredOut(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+		Tags: map[string]string{
+			"foo": "bar",
+		},
+		Filter: Filter{NamePass: []string{"foobar"}},
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+	assert.NoError(t, ri.Config.Filter.Compile())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		nil,
+		telegraf.Untyped,
+		now,
+	)
+	assert.Nil(t, m)
+}
+
+func TestMakeMetricWithDaemonTags(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+	ri.SetDefaultTags(map[string]string{
+		"foo": "bar",
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest,foo=bar value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+// make an untyped, counter, & gauge metric
+func TestMakeMetricInfFields(t *testing.T) {
+	inf := math.Inf(1)
+	ninf := math.Inf(-1)
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{
+			"value": int(101),
+			"inf":   inf,
+			"ninf":  ninf,
+		},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+func TestMakeMetricAllFieldTypes(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name: "TestRunningInput",
+	})
+
+	ri.SetTrace(true)
+	assert.Equal(t, true, ri.Trace())
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{
+			"a": int(10),
+			"b": int8(10),
+			"c": int16(10),
+			"d": int32(10),
+			"e": uint(10),
+			"f": uint8(10),
+			"g": uint16(10),
+			"h": uint32(10),
+			"i": uint64(10),
+			"j": float32(10),
+			"k": uint64(9223372036854775810),
+			"l": "foobar",
+			"m": true,
+		},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Contains(t, m.String(), "a=10i")
+	assert.Contains(t, m.String(), "b=10i")
+	assert.Contains(t, m.String(), "c=10i")
+	assert.Contains(t, m.String(), "d=10i")
+	assert.Contains(t, m.String(), "e=10i")
+	assert.Contains(t, m.String(), "f=10i")
+	assert.Contains(t, m.String(), "g=10i")
+	assert.Contains(t, m.String(), "h=10i")
+	assert.Contains(t, m.String(), "i=10i")
+	assert.Contains(t, m.String(), "j=10")
+	assert.NotContains(t, m.String(), "j=10i")
+	assert.Contains(t, m.String(), "k=9223372036854775807i")
+	assert.Contains(t, m.String(), "l=\"foobar\"")
+	assert.Contains(t, m.String(), "m=true")
+}
+
+func TestMakeMetricNameOverride(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name:         "TestRunningInput",
+		NameOverride: "foobar",
+	})
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("foobar value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+func TestMakeMetricNamePrefix(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name:              "TestRunningInput",
+		MeasurementPrefix: "foobar_",
+	})
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("foobar_RITest value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+func TestMakeMetricNameSuffix(t *testing.T) {
+	now := time.Now()
+	ri := NewRunningInput(&testInput{}, &InputConfig{
+		Name:              "TestRunningInput",
+		MeasurementSuffix: "_foobar",
+	})
+
+	m := ri.MakeMetric(
+		"RITest",
+		map[string]interface{}{"value": int(101)},
+		map[string]string{},
+		telegraf.Untyped,
+		now,
+	)
+	assert.Equal(
+		t,
+		fmt.Sprintf("RITest_foobar value=101i %d\n", now.UnixNano()),
+		m.String(),
+	)
+}
+
+type testInput struct{}
+
+func (t *testInput) Description() string                   { return "" }
+func (t *testInput) SampleConfig() string                  { return "" }
+func (t *testInput) Gather(acc telegraf.Accumulator) error { return nil }

internal/models/running_output.go

@@ -0,0 +1,186 @@
+package models
+
+import (
+	"log"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal/buffer"
+	"github.com/influxdata/telegraf/metric"
+	"github.com/influxdata/telegraf/selfstat"
+)
+
+const (
+	// Default size of metrics batch size.
+	DEFAULT_METRIC_BATCH_SIZE = 1000
+
+	// Default number of metrics kept. It should be a multiple of batch size.
+	DEFAULT_METRIC_BUFFER_LIMIT = 10000
+)
+
+// RunningOutput contains the output configuration
+type RunningOutput struct {
+	Name              string
+	Output            telegraf.Output
+	Config            *OutputConfig
+	MetricBufferLimit int
+	MetricBatchSize   int
+
+	MetricsFiltered selfstat.Stat
+	MetricsWritten  selfstat.Stat
+	BufferSize      selfstat.Stat
+	BufferLimit     selfstat.Stat
+	WriteTime       selfstat.Stat
+
+	metrics     *buffer.Buffer
+	failMetrics *buffer.Buffer
+}
+
+func NewRunningOutput(
+	name string,
+	output telegraf.Output,
+	conf *OutputConfig,
+	batchSize int,
+	bufferLimit int,
+) *RunningOutput {
+	if bufferLimit == 0 {
+		bufferLimit = DEFAULT_METRIC_BUFFER_LIMIT
+	}
+	if batchSize == 0 {
+		batchSize = DEFAULT_METRIC_BATCH_SIZE
+	}
+	ro := &RunningOutput{
+		Name:              name,
+		metrics:           buffer.NewBuffer(batchSize),
+		failMetrics:       buffer.NewBuffer(bufferLimit),
+		Output:            output,
+		Config:            conf,
+		MetricBufferLimit: bufferLimit,
+		MetricBatchSize:   batchSize,
+		MetricsWritten: selfstat.Register(
+			"write",
+			"metrics_written",
+			map[string]string{"output": name},
+		),
+		MetricsFiltered: selfstat.Register(
+			"write",
+			"metrics_filtered",
+			map[string]string{"output": name},
+		),
+		BufferSize: selfstat.Register(
+			"write",
+			"buffer_size",
+			map[string]string{"output": name},
+		),
+		BufferLimit: selfstat.Register(
+			"write",
+			"buffer_limit",
+			map[string]string{"output": name},
+		),
+		WriteTime: selfstat.RegisterTiming(
+			"write",
+			"write_time_ns",
+			map[string]string{"output": name},
+		),
+	}
+	ro.BufferLimit.Incr(int64(ro.MetricBufferLimit))
+	return ro
+}
+
+// AddMetric adds a metric to the output. This function can also write cached
+// points if FlushBufferWhenFull is true.
+func (ro *RunningOutput) AddMetric(m telegraf.Metric) {
+	// Filter any tagexclude/taginclude parameters before adding metric
+	if ro.Config.Filter.IsActive() {
+		// In order to filter out tags, we need to create a new metric, since
+		// metrics are immutable once created.
+		name := m.Name()
+		tags := m.Tags()
+		fields := m.Fields()
+		t := m.Time()
+		if ok := ro.Config.Filter.Apply(name, fields, tags); !ok {
+			ro.MetricsFiltered.Incr(1)
+			return
+		}
+		// error is not possible if creating from another metric, so ignore.
+		m, _ = metric.New(name, tags, fields, t)
+	}
+
+	ro.metrics.Add(m)
+	if ro.metrics.Len() == ro.MetricBatchSize {
+		batch := ro.metrics.Batch(ro.MetricBatchSize)
+		err := ro.write(batch)
+		if err != nil {
+			ro.failMetrics.Add(batch...)
+		}
+	}
+}
+
+// Write writes all cached points to this output.
+func (ro *RunningOutput) Write() error {
+	nFails, nMetrics := ro.failMetrics.Len(), ro.metrics.Len()
+	log.Printf("D! Output [%s] buffer fullness: %d / %d metrics. ",
+		ro.Name, nFails+nMetrics, ro.MetricBufferLimit)
+	ro.BufferSize.Incr(int64(nFails + nMetrics))
+	var err error
+	if !ro.failMetrics.IsEmpty() {
+		// how many batches of failed writes we need to write.
+		nBatches := nFails/ro.MetricBatchSize + 1
+		batchSize := ro.MetricBatchSize
+
+		for i := 0; i < nBatches; i++ {
+			// If it's the last batch, only grab the metrics that have not had
+			// a write attempt already (this is primarily to preserve order).
+			if i == nBatches-1 {
+				batchSize = nFails % ro.MetricBatchSize
+			}
+			batch := ro.failMetrics.Batch(batchSize)
+			// If we've already failed previous writes, don't bother trying to
+			// write to this output again. We are not exiting the loop just so
+			// that we can rotate the metrics to preserve order.
+			if err == nil {
+				err = ro.write(batch)
+			}
+			if err != nil {
+				ro.failMetrics.Add(batch...)
+			}
+		}
+	}
+
+	batch := ro.metrics.Batch(ro.MetricBatchSize)
+	// see comment above about not trying to write to an already failed output.
+	// if ro.failMetrics is empty then err will always be nil at this point.
+	if err == nil {
+		err = ro.write(batch)
+	}
+
+	if err != nil {
+		ro.failMetrics.Add(batch...)
+		return err
+	}
+	return nil
+}
+
+func (ro *RunningOutput) write(metrics []telegraf.Metric) error {
+	nMetrics := len(metrics)
+	if nMetrics == 0 {
+		return nil
+	}
+	start := time.Now()
+	err := ro.Output.Write(metrics)
+	elapsed := time.Since(start)
+	if err == nil {
+		log.Printf("D! Output [%s] wrote batch of %d metrics in %s\n",
+			ro.Name, nMetrics, elapsed)
+		ro.MetricsWritten.Incr(int64(nMetrics))
+		ro.BufferSize.Incr(-int64(nMetrics))
+		ro.WriteTime.Incr(elapsed.Nanoseconds())
+	}
+	return err
+}
+
+// OutputConfig containing name and filter
+type OutputConfig struct {
+	Name   string
+	Filter Filter
+}

internal/models/running_output_test.go

@@ -0,0 +1,539 @@
+package models
+
+import (
+	"fmt"
+	"sync"
+	"testing"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/testutil"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+var first5 = []telegraf.Metric{
+	testutil.TestMetric(101, "metric1"),
+	testutil.TestMetric(101, "metric2"),
+	testutil.TestMetric(101, "metric3"),
+	testutil.TestMetric(101, "metric4"),
+	testutil.TestMetric(101, "metric5"),
+}
+
+var next5 = []telegraf.Metric{
+	testutil.TestMetric(101, "metric6"),
+	testutil.TestMetric(101, "metric7"),
+	testutil.TestMetric(101, "metric8"),
+	testutil.TestMetric(101, "metric9"),
+	testutil.TestMetric(101, "metric10"),
+}
+
+// Benchmark adding metrics.
+func BenchmarkRunningOutputAddWrite(b *testing.B) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &perfOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for n := 0; n < b.N; n++ {
+		ro.AddMetric(testutil.TestMetric(101, "metric1"))
+		ro.Write()
+	}
+}
+
+// Benchmark adding metrics.
+func BenchmarkRunningOutputAddWriteEvery100(b *testing.B) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &perfOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for n := 0; n < b.N; n++ {
+		ro.AddMetric(testutil.TestMetric(101, "metric1"))
+		if n%100 == 0 {
+			ro.Write()
+		}
+	}
+}
+
+// Benchmark adding metrics.
+func BenchmarkRunningOutputAddFailWrites(b *testing.B) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &perfOutput{}
+	m.failWrite = true
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for n := 0; n < b.N; n++ {
+		ro.AddMetric(testutil.TestMetric(101, "metric1"))
+	}
+}
+
+// Test that NameDrop filters ger properly applied.
+func TestRunningOutput_DropFilter(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			NameDrop: []string{"metric1", "metric2"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 8)
+}
+
+// Test that NameDrop filters without a match do nothing.
+func TestRunningOutput_PassFilter(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			NameDrop: []string{"metric1000", "foo*"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 10)
+}
+
+// Test that tags are properly included
+func TestRunningOutput_TagIncludeNoMatch(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			TagInclude: []string{"nothing*"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	ro.AddMetric(testutil.TestMetric(101, "metric1"))
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 1)
+	assert.Empty(t, m.Metrics()[0].Tags())
+}
+
+// Test that tags are properly excluded
+func TestRunningOutput_TagExcludeMatch(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			TagExclude: []string{"tag*"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	ro.AddMetric(testutil.TestMetric(101, "metric1"))
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 1)
+	assert.Len(t, m.Metrics()[0].Tags(), 0)
+}
+
+// Test that tags are properly Excluded
+func TestRunningOutput_TagExcludeNoMatch(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			TagExclude: []string{"nothing*"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	ro.AddMetric(testutil.TestMetric(101, "metric1"))
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 1)
+	assert.Len(t, m.Metrics()[0].Tags(), 1)
+}
+
+// Test that tags are properly included
+func TestRunningOutput_TagIncludeMatch(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{
+			TagInclude: []string{"tag*"},
+		},
+	}
+	assert.NoError(t, conf.Filter.Compile())
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	ro.AddMetric(testutil.TestMetric(101, "metric1"))
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 1)
+	assert.Len(t, m.Metrics()[0].Tags(), 1)
+}
+
+// Test that we can write metrics with simple default setup.
+func TestRunningOutputDefault(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 1000, 10000)
+
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	assert.Len(t, m.Metrics(), 0)
+
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 10)
+}
+
+// Test that running output doesn't flush until it's full when
+// FlushBufferWhenFull is set.
+func TestRunningOutputFlushWhenFull(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 6, 10)
+
+	// Fill buffer to 1 under limit
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	// no flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// add one more metric
+	ro.AddMetric(next5[0])
+	// now it flushed
+	assert.Len(t, m.Metrics(), 6)
+
+	// add one more metric and write it manually
+	ro.AddMetric(next5[1])
+	err := ro.Write()
+	assert.NoError(t, err)
+	assert.Len(t, m.Metrics(), 7)
+}
+
+// Test that running output doesn't flush until it's full when
+// FlushBufferWhenFull is set, twice.
+func TestRunningOutputMultiFlushWhenFull(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	ro := NewRunningOutput("test", m, conf, 4, 12)
+
+	// Fill buffer past limit twive
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	// flushed twice
+	assert.Len(t, m.Metrics(), 8)
+}
+
+func TestRunningOutputWriteFail(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	m.failWrite = true
+	ro := NewRunningOutput("test", m, conf, 4, 12)
+
+	// Fill buffer to limit twice
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// manual write fails
+	err := ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	m.failWrite = false
+	err = ro.Write()
+	require.NoError(t, err)
+
+	assert.Len(t, m.Metrics(), 10)
+}
+
+// Verify that the order of points is preserved during a write failure.
+func TestRunningOutputWriteFailOrder(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	m.failWrite = true
+	ro := NewRunningOutput("test", m, conf, 100, 1000)
+
+	// add 5 metrics
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// Write fails
+	err := ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	m.failWrite = false
+	// add 5 more metrics
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	err = ro.Write()
+	require.NoError(t, err)
+
+	// Verify that 10 metrics were written
+	assert.Len(t, m.Metrics(), 10)
+	// Verify that they are in order
+	expected := append(first5, next5...)
+	assert.Equal(t, expected, m.Metrics())
+}
+
+// Verify that the order of points is preserved during many write failures.
+func TestRunningOutputWriteFailOrder2(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	m.failWrite = true
+	ro := NewRunningOutput("test", m, conf, 5, 100)
+
+	// add 5 metrics
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	// Write fails
+	err := ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// add 5 metrics
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	// Write fails
+	err = ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// add 5 metrics
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	// Write fails
+	err = ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// add 5 metrics
+	for _, metric := range next5 {
+		ro.AddMetric(metric)
+	}
+	// Write fails
+	err = ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	m.failWrite = false
+	err = ro.Write()
+	require.NoError(t, err)
+
+	// Verify that 10 metrics were written
+	assert.Len(t, m.Metrics(), 20)
+	// Verify that they are in order
+	expected := append(first5, next5...)
+	expected = append(expected, first5...)
+	expected = append(expected, next5...)
+	assert.Equal(t, expected, m.Metrics())
+}
+
+// Verify that the order of points is preserved when there is a remainder
+// of points for the batch.
+//
+// ie, with a batch size of 5:
+//
+//     1 2 3 4 5 6 <-- order, failed points
+//     6 1 2 3 4 5 <-- order, after 1st write failure (1 2 3 4 5 was batch)
+//     1 2 3 4 5 6 <-- order, after 2nd write failure, (6 was batch)
+//
+func TestRunningOutputWriteFailOrder3(t *testing.T) {
+	conf := &OutputConfig{
+		Filter: Filter{},
+	}
+
+	m := &mockOutput{}
+	m.failWrite = true
+	ro := NewRunningOutput("test", m, conf, 5, 1000)
+
+	// add 5 metrics
+	for _, metric := range first5 {
+		ro.AddMetric(metric)
+	}
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// Write fails
+	err := ro.Write()
+	require.Error(t, err)
+	// no successful flush yet
+	assert.Len(t, m.Metrics(), 0)
+
+	// add and attempt to write a single metric:
+	ro.AddMetric(next5[0])
+	err = ro.Write()
+	require.Error(t, err)
+
+	// unset fail and write metrics
+	m.failWrite = false
+	err = ro.Write()
+	require.NoError(t, err)
+
+	// Verify that 6 metrics were written
+	assert.Len(t, m.Metrics(), 6)
+	// Verify that they are in order
+	expected := append(first5, next5[0])
+	assert.Equal(t, expected, m.Metrics())
+}
+
+type mockOutput struct {
+	sync.Mutex
+
+	metrics []telegraf.Metric
+
+	// if true, mock a write failure
+	failWrite bool
+}
+
+func (m *mockOutput) Connect() error {
+	return nil
+}
+
+func (m *mockOutput) Close() error {
+	return nil
+}
+
+func (m *mockOutput) Description() string {
+	return ""
+}
+
+func (m *mockOutput) SampleConfig() string {
+	return ""
+}
+
+func (m *mockOutput) Write(metrics []telegraf.Metric) error {
+	m.Lock()
+	defer m.Unlock()
+	if m.failWrite {
+		return fmt.Errorf("Failed Write!")
+	}
+
+	if m.metrics == nil {
+		m.metrics = []telegraf.Metric{}
+	}
+
+	for _, metric := range metrics {
+		m.metrics = append(m.metrics, metric)
+	}
+	return nil
+}
+
+func (m *mockOutput) Metrics() []telegraf.Metric {
+	m.Lock()
+	defer m.Unlock()
+	return m.metrics
+}
+
+type perfOutput struct {
+	// if true, mock a write failure
+	failWrite bool
+}
+
+func (m *perfOutput) Connect() error {
+	return nil
+}
+
+func (m *perfOutput) Close() error {
+	return nil
+}
+
+func (m *perfOutput) Description() string {
+	return ""
+}
+
+func (m *perfOutput) SampleConfig() string {
+	return ""
+}
+
+func (m *perfOutput) Write(metrics []telegraf.Metric) error {
+	if m.failWrite {
+		return fmt.Errorf("Failed Write!")
+	}
+	return nil
+}

internal/models/running_processor.go

@@ -0,0 +1,44 @@
+package models
+
+import (
+	"github.com/influxdata/telegraf"
+)
+
+type RunningProcessor struct {
+	Name      string
+	Processor telegraf.Processor
+	Config    *ProcessorConfig
+}
+
+type RunningProcessors []*RunningProcessor
+
+func (rp RunningProcessors) Len() int           { return len(rp) }
+func (rp RunningProcessors) Swap(i, j int)      { rp[i], rp[j] = rp[j], rp[i] }
+func (rp RunningProcessors) Less(i, j int) bool { return rp[i].Config.Order < rp[j].Config.Order }
+
+// FilterConfig containing a name and filter
+type ProcessorConfig struct {
+	Name   string
+	Order  int64
+	Filter Filter
+}
+
+func (rp *RunningProcessor) Apply(in ...telegraf.Metric) []telegraf.Metric {
+	ret := []telegraf.Metric{}
+
+	for _, metric := range in {
+		if rp.Config.Filter.IsActive() {
+			// check if the filter should be applied to this metric
+			if ok := rp.Config.Filter.Apply(metric.Name(), metric.Fields(), metric.Tags()); !ok {
+				// this means filter should not be applied
+				ret = append(ret, metric)
+				continue
+			}
+		}
+		// This metric should pass through the filter, so call the filter Apply
+		// function and append results to the output slice.
+		ret = append(ret, rp.Processor.Apply(metric)...)
+	}
+
+	return ret
+}

internal/models/running_processor_test.go

@@ -0,0 +1,117 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/testutil"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type TestProcessor struct {
+}
+
+func (f *TestProcessor) SampleConfig() string { return "" }
+func (f *TestProcessor) Description() string  { return "" }
+
+// Apply renames:
+//   "foo" to "fuz"
+//   "bar" to "baz"
+// And it also drops measurements named "dropme"
+func (f *TestProcessor) Apply(in ...telegraf.Metric) []telegraf.Metric {
+	out := make([]telegraf.Metric, 0)
+	for _, m := range in {
+		switch m.Name() {
+		case "foo":
+			out = append(out, testutil.TestMetric(1, "fuz"))
+		case "bar":
+			out = append(out, testutil.TestMetric(1, "baz"))
+		case "dropme":
+			// drop the metric!
+		default:
+			out = append(out, m)
+		}
+	}
+	return out
+}
+
+func NewTestRunningProcessor() *RunningProcessor {
+	out := &RunningProcessor{
+		Name:      "test",
+		Processor: &TestProcessor{},
+		Config:    &ProcessorConfig{Filter: Filter{}},
+	}
+	return out
+}
+
+func TestRunningProcessor(t *testing.T) {
+	inmetrics := []telegraf.Metric{
+		testutil.TestMetric(1, "foo"),
+		testutil.TestMetric(1, "bar"),
+		testutil.TestMetric(1, "baz"),
+	}
+
+	expectedNames := []string{
+		"fuz",
+		"baz",
+		"baz",
+	}
+	rfp := NewTestRunningProcessor()
+	filteredMetrics := rfp.Apply(inmetrics...)
+
+	actualNames := []string{
+		filteredMetrics[0].Name(),
+		filteredMetrics[1].Name(),
+		filteredMetrics[2].Name(),
+	}
+	assert.Equal(t, expectedNames, actualNames)
+}
+
+func TestRunningProcessor_WithNameDrop(t *testing.T) {
+	inmetrics := []telegraf.Metric{
+		testutil.TestMetric(1, "foo"),
+		testutil.TestMetric(1, "bar"),
+		testutil.TestMetric(1, "baz"),
+	}
+
+	expectedNames := []string{
+		"foo",
+		"baz",
+		"baz",
+	}
+	rfp := NewTestRunningProcessor()
+
+	rfp.Config.Filter.NameDrop = []string{"foo"}
+	assert.NoError(t, rfp.Config.Filter.Compile())
+
+	filteredMetrics := rfp.Apply(inmetrics...)
+
+	actualNames := []string{
+		filteredMetrics[0].Name(),
+		filteredMetrics[1].Name(),
+		filteredMetrics[2].Name(),
+	}
+	assert.Equal(t, expectedNames, actualNames)
+}
+
+func TestRunningProcessor_DroppedMetric(t *testing.T) {
+	inmetrics := []telegraf.Metric{
+		testutil.TestMetric(1, "dropme"),
+		testutil.TestMetric(1, "foo"),
+		testutil.TestMetric(1, "bar"),
+	}
+
+	expectedNames := []string{
+		"fuz",
+		"baz",
+	}
+	rfp := NewTestRunningProcessor()
+	filteredMetrics := rfp.Apply(inmetrics...)
+
+	actualNames := []string{
+		filteredMetrics[0].Name(),
+		filteredMetrics[1].Name(),
+	}
+	assert.Equal(t, expectedNames, actualNames)
+}

logger/logger.go

@@ -0,0 +1,60 @@
+package logger
+
+import (
+	"io"
+	"log"
+	"os"
+	"time"
+
+	"github.com/influxdata/wlog"
+)
+
+// newTelegrafWriter returns a logging-wrapped writer.
+func newTelegrafWriter(w io.Writer) io.Writer {
+	return &telegrafLog{
+		writer: wlog.NewWriter(w),
+	}
+}
+
+type telegrafLog struct {
+	writer io.Writer
+}
+
+func (t *telegrafLog) Write(b []byte) (n int, err error) {
+	return t.writer.Write(append([]byte(time.Now().UTC().Format(time.RFC3339)+" "), b...))
+}
+
+// SetupLogging configures the logging output.
+//   debug   will set the log level to DEBUG
+//   quiet   will set the log level to ERROR
+//   logfile will direct the logging output to a file. Empty string is
+//           interpreted as stderr. If there is an error opening the file the
+//           logger will fallback to stderr.
+func SetupLogging(debug, quiet bool, logfile string) {
+	log.SetFlags(0)
+	if debug {
+		wlog.SetLevel(wlog.DEBUG)
+	}
+	if quiet {
+		wlog.SetLevel(wlog.ERROR)
+	}
+
+	var oFile *os.File
+	if logfile != "" {
+		if _, err := os.Stat(logfile); os.IsNotExist(err) {
+			if oFile, err = os.Create(logfile); err != nil {
+				log.Printf("E! Unable to create %s (%s), using stderr", logfile, err)
+				oFile = os.Stderr
+			}
+		} else {
+			if oFile, err = os.OpenFile(logfile, os.O_APPEND|os.O_WRONLY, os.ModeAppend); err != nil {
+				log.Printf("E! Unable to append to %s (%s), using stderr", logfile, err)
+				oFile = os.Stderr
+			}
+		}
+	} else {
+		oFile = os.Stderr
+	}
+
+	log.SetOutput(newTelegrafWriter(oFile))
+}

logger/logger_test.go

@@ -0,0 +1,62 @@
+package logger
+
+import (
+	"bytes"
+	"io/ioutil"
+	"log"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestWriteLogToFile(t *testing.T) {
+	tmpfile, err := ioutil.TempFile("", "")
+	assert.NoError(t, err)
+	defer func() { os.Remove(tmpfile.Name()) }()
+
+	SetupLogging(false, false, tmpfile.Name())
+	log.Printf("I! TEST")
+	log.Printf("D! TEST") // <- should be ignored
+
+	f, err := ioutil.ReadFile(tmpfile.Name())
+	assert.NoError(t, err)
+	assert.Equal(t, f[19:], []byte("Z I! TEST\n"))
+}
+
+func TestDebugWriteLogToFile(t *testing.T) {
+	tmpfile, err := ioutil.TempFile("", "")
+	assert.NoError(t, err)
+	defer func() { os.Remove(tmpfile.Name()) }()
+
+	SetupLogging(true, false, tmpfile.Name())
+	log.Printf("D! TEST")
+
+	f, err := ioutil.ReadFile(tmpfile.Name())
+	assert.NoError(t, err)
+	assert.Equal(t, f[19:], []byte("Z D! TEST\n"))
+}
+
+func TestErrorWriteLogToFile(t *testing.T) {
+	tmpfile, err := ioutil.TempFile("", "")
+	assert.NoError(t, err)
+	defer func() { os.Remove(tmpfile.Name()) }()
+
+	SetupLogging(false, true, tmpfile.Name())
+	log.Printf("E! TEST")
+	log.Printf("I! TEST") // <- should be ignored
+
+	f, err := ioutil.ReadFile(tmpfile.Name())
+	assert.NoError(t, err)
+	assert.Equal(t, f[19:], []byte("Z E! TEST\n"))
+}
+
+func BenchmarkTelegrafLogWrite(b *testing.B) {
+	var msg = []byte("test")
+	var buf bytes.Buffer
+	w := newTelegrafWriter(&buf)
+	for i := 0; i < b.N; i++ {
+		buf.Reset()
+		w.Write(msg)
+	}
+}

metric.go

@@ -0,0 +1,62 @@
+package telegraf
+
+import (
+	"time"
+
+	// TODO remove
+	"github.com/influxdata/influxdb/client/v2"
+)
+
+// ValueType is an enumeration of metric types that represent a simple value.
+type ValueType int
+
+// Possible values for the ValueType enum.
+const (
+	_ ValueType = iota
+	Counter
+	Gauge
+	Untyped
+)
+
+type Metric interface {
+	Serialize() []byte
+	String() string // convenience function for string(Serialize())
+	Copy() Metric
+	// Split will attempt to return multiple metrics with the same timestamp
+	// whose string representations are no longer than maxSize.
+	// Metrics with a single field may exceed the requested size.
+	Split(maxSize int) []Metric
+
+	// Tag functions
+	HasTag(key string) bool
+	AddTag(key, value string)
+	RemoveTag(key string)
+
+	// Field functions
+	HasField(key string) bool
+	AddField(key string, value interface{})
+	RemoveField(key string) error
+
+	// Name functions
+	SetName(name string)
+	SetPrefix(prefix string)
+	SetSuffix(suffix string)
+
+	// Getting data structure functions
+	Name() string
+	Tags() map[string]string
+	Fields() map[string]interface{}
+	Time() time.Time
+	UnixNano() int64
+	Type() ValueType
+	Len() int // returns the length of the serialized metric, including newline
+	HashID() uint64
+
+	// aggregator things:
+	SetAggregate(bool)
+	IsAggregate() bool
+
+	// Point returns a influxdb client.Point object
+	// TODO remove this function
+	Point() *client.Point
+}

metric/escape.go

@@ -0,0 +1,49 @@
+package metric
+
+import (
+	"strings"
+)
+
+var (
+	// escaper is for escaping:
+	//   - tag keys
+	//   - tag values
+	//   - field keys
+	// see https://docs.influxdata.com/influxdb/v1.0/write_protocols/line_protocol_tutorial/#special-characters-and-keywords
+	escaper   = strings.NewReplacer(`,`, `\,`, `"`, `\"`, ` `, `\ `, `=`, `\=`)
+	unEscaper = strings.NewReplacer(`\,`, `,`, `\"`, `"`, `\ `, ` `, `\=`, `=`)
+
+	// nameEscaper is for escaping measurement names only.
+	// see https://docs.influxdata.com/influxdb/v1.0/write_protocols/line_protocol_tutorial/#special-characters-and-keywords
+	nameEscaper   = strings.NewReplacer(`,`, `\,`, ` `, `\ `)
+	nameUnEscaper = strings.NewReplacer(`\,`, `,`, `\ `, ` `)
+
+	// stringFieldEscaper is for escaping string field values only.
+	// see https://docs.influxdata.com/influxdb/v1.0/write_protocols/line_protocol_tutorial/#special-characters-and-keywords
+	stringFieldEscaper   = strings.NewReplacer(`"`, `\"`)
+	stringFieldUnEscaper = strings.NewReplacer(`\"`, `"`)
+)
+
+func escape(s string, t string) string {
+	switch t {
+	case "fieldkey", "tagkey", "tagval":
+		return escaper.Replace(s)
+	case "name":
+		return nameEscaper.Replace(s)
+	case "fieldval":
+		return stringFieldEscaper.Replace(s)
+	}
+	return s
+}
+
+func unescape(s string, t string) string {
+	switch t {
+	case "fieldkey", "tagkey", "tagval":
+		return unEscaper.Replace(s)
+	case "name":
+		return nameUnEscaper.Replace(s)
+	case "fieldval":
+		return stringFieldUnEscaper.Replace(s)
+	}
+	return s
+}

metric/inline_strconv_parse.go

@@ -0,0 +1,38 @@
+package metric
+
+import (
+	"reflect"
+	"strconv"
+	"unsafe"
+)
+
+// parseIntBytes is a zero-alloc wrapper around strconv.ParseInt.
+func parseIntBytes(b []byte, base int, bitSize int) (i int64, err error) {
+	s := unsafeBytesToString(b)
+	return strconv.ParseInt(s, base, bitSize)
+}
+
+// parseFloatBytes is a zero-alloc wrapper around strconv.ParseFloat.
+func parseFloatBytes(b []byte, bitSize int) (float64, error) {
+	s := unsafeBytesToString(b)
+	return strconv.ParseFloat(s, bitSize)
+}
+
+// parseBoolBytes is a zero-alloc wrapper around strconv.ParseBool.
+func parseBoolBytes(b []byte) (bool, error) {
+	return strconv.ParseBool(unsafeBytesToString(b))
+}
+
+// unsafeBytesToString converts a []byte to a string without a heap allocation.
+//
+// It is unsafe, and is intended to prepare input to short-lived functions
+// that require strings.
+func unsafeBytesToString(in []byte) string {
+	src := *(*reflect.SliceHeader)(unsafe.Pointer(&in))
+	dst := reflect.StringHeader{
+		Data: src.Data,
+		Len:  src.Len,
+	}
+	s := *(*string)(unsafe.Pointer(&dst))
+	return s
+}

metric/inline_strconv_parse_test.go

@@ -0,0 +1,103 @@
+package metric
+
+import (
+	"strconv"
+	"testing"
+	"testing/quick"
+)
+
+func TestParseIntBytesEquivalenceFuzz(t *testing.T) {
+	f := func(b []byte, base int, bitSize int) bool {
+		exp, expErr := strconv.ParseInt(string(b), base, bitSize)
+		got, gotErr := parseIntBytes(b, base, bitSize)
+
+		return exp == got && checkErrs(expErr, gotErr)
+	}
+
+	cfg := &quick.Config{
+		MaxCount: 10000,
+	}
+
+	if err := quick.Check(f, cfg); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestParseIntBytesValid64bitBase10EquivalenceFuzz(t *testing.T) {
+	buf := []byte{}
+	f := func(n int64) bool {
+		buf = strconv.AppendInt(buf[:0], n, 10)
+
+		exp, expErr := strconv.ParseInt(string(buf), 10, 64)
+		got, gotErr := parseIntBytes(buf, 10, 64)
+
+		return exp == got && checkErrs(expErr, gotErr)
+	}
+
+	cfg := &quick.Config{
+		MaxCount: 10000,
+	}
+
+	if err := quick.Check(f, cfg); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestParseFloatBytesEquivalenceFuzz(t *testing.T) {
+	f := func(b []byte, bitSize int) bool {
+		exp, expErr := strconv.ParseFloat(string(b), bitSize)
+		got, gotErr := parseFloatBytes(b, bitSize)
+
+		return exp == got && checkErrs(expErr, gotErr)
+	}
+
+	cfg := &quick.Config{
+		MaxCount: 10000,
+	}
+
+	if err := quick.Check(f, cfg); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestParseFloatBytesValid64bitEquivalenceFuzz(t *testing.T) {
+	buf := []byte{}
+	f := func(n float64) bool {
+		buf = strconv.AppendFloat(buf[:0], n, 'f', -1, 64)
+
+		exp, expErr := strconv.ParseFloat(string(buf), 64)
+		got, gotErr := parseFloatBytes(buf, 64)
+
+		return exp == got && checkErrs(expErr, gotErr)
+	}
+
+	cfg := &quick.Config{
+		MaxCount: 10000,
+	}
+
+	if err := quick.Check(f, cfg); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestParseBoolBytesEquivalence(t *testing.T) {
+	var buf []byte
+	for _, s := range []string{"1", "t", "T", "TRUE", "true", "True", "0", "f", "F", "FALSE", "false", "False", "fail", "TrUe", "FAlSE", "numbers", ""} {
+		buf = append(buf[:0], s...)
+
+		exp, expErr := strconv.ParseBool(s)
+		got, gotErr := parseBoolBytes(buf)
+
+		if got != exp || !checkErrs(expErr, gotErr) {
+			t.Errorf("Failed to parse boolean value %q correctly: wanted (%t, %v), got (%t, %v)", s, exp, expErr, got, gotErr)
+		}
+	}
+}
+
+func checkErrs(a, b error) bool {
+	if (a == nil) != (b == nil) {
+		return false
+	}
+
+	return a == nil || a.Error() == b.Error()
+}

metric/metric.go

@@ -0,0 +1,546 @@
+package metric
+
+import (
+	"bytes"
+	"fmt"
+	"hash/fnv"
+	"sort"
+	"strconv"
+	"time"
+
+	"github.com/influxdata/telegraf"
+
+	// TODO remove
+	"github.com/influxdata/influxdb/client/v2"
+)
+
+const MaxInt = int(^uint(0) >> 1)
+
+func New(
+	name string,
+	tags map[string]string,
+	fields map[string]interface{},
+	t time.Time,
+	mType ...telegraf.ValueType,
+) (telegraf.Metric, error) {
+	if len(fields) == 0 {
+		return nil, fmt.Errorf("Metric cannot be made without any fields")
+	}
+	if len(name) == 0 {
+		return nil, fmt.Errorf("Metric cannot be made with an empty name")
+	}
+
+	var thisType telegraf.ValueType
+	if len(mType) > 0 {
+		thisType = mType[0]
+	} else {
+		thisType = telegraf.Untyped
+	}
+
+	m := &metric{
+		name:  []byte(escape(name, "name")),
+		t:     []byte(fmt.Sprint(t.UnixNano())),
+		nsec:  t.UnixNano(),
+		mType: thisType,
+	}
+
+	// pre-allocate exact size of the tags slice
+	taglen := 0
+	for k, v := range tags {
+		// TODO check that length of tag key & value are > 0
+		taglen += 2 + len(escape(k, "tagkey")) + len(escape(v, "tagval"))
+	}
+	m.tags = make([]byte, taglen)
+
+	i := 0
+	for k, v := range tags {
+		m.tags[i] = ','
+		i++
+		i += copy(m.tags[i:], escape(k, "tagkey"))
+		m.tags[i] = '='
+		i++
+		i += copy(m.tags[i:], escape(v, "tagval"))
+	}
+
+	// pre-allocate capacity of the fields slice
+	fieldlen := 0
+	for k, _ := range fields {
+		// 10 bytes is completely arbitrary, but will at least prevent some
+		// amount of allocations. There's a small possibility this will create
+		// slightly more allocations for a metric that has many short fields.
+		fieldlen += len(k) + 10
+	}
+	m.fields = make([]byte, 0, fieldlen)
+
+	i = 0
+	for k, v := range fields {
+		if i != 0 {
+			m.fields = append(m.fields, ',')
+		}
+		m.fields = appendField(m.fields, k, v)
+		i++
+	}
+
+	return m, nil
+}
+
+// indexUnescapedByte finds the index of the first byte equal to b in buf that
+// is not escaped. Returns -1 if not found.
+func indexUnescapedByte(buf []byte, b byte) int {
+	var keyi int
+	for {
+		i := bytes.IndexByte(buf[keyi:], b)
+		if i == -1 {
+			return -1
+		} else if i == 0 {
+			break
+		}
+		keyi += i
+		if countBackslashes(buf, keyi-1)%2 == 0 {
+			break
+		} else {
+			keyi++
+		}
+	}
+	return keyi
+}
+
+// countBackslashes counts the number of preceding backslashes starting at
+// the 'start' index.
+func countBackslashes(buf []byte, index int) int {
+	var count int
+	for {
+		if index < 0 {
+			return count
+		}
+		if buf[index] == '\\' {
+			count++
+			index--
+		} else {
+			break
+		}
+	}
+	return count
+}
+
+type metric struct {
+	name   []byte
+	tags   []byte
+	fields []byte
+	t      []byte
+
+	mType     telegraf.ValueType
+	aggregate bool
+
+	// cached values for reuse in "get" functions
+	hashID uint64
+	nsec   int64
+}
+
+func (m *metric) Point() *client.Point {
+	c, _ := client.NewPoint(m.Name(), m.Tags(), m.Fields(), m.Time())
+	return c
+}
+
+func (m *metric) String() string {
+	return string(m.name) + string(m.tags) + " " + string(m.fields) + " " + string(m.t) + "\n"
+}
+
+func (m *metric) SetAggregate(b bool) {
+	m.aggregate = b
+}
+
+func (m *metric) IsAggregate() bool {
+	return m.aggregate
+}
+
+func (m *metric) Type() telegraf.ValueType {
+	return m.mType
+}
+
+func (m *metric) Len() int {
+	// 3 is for 2 spaces surrounding the fields array + newline at the end.
+	return len(m.name) + len(m.tags) + len(m.fields) + len(m.t) + 3
+}
+
+func (m *metric) Serialize() []byte {
+	tmp := make([]byte, m.Len())
+	i := 0
+	i += copy(tmp[i:], m.name)
+	i += copy(tmp[i:], m.tags)
+	tmp[i] = ' '
+	i++
+	i += copy(tmp[i:], m.fields)
+	tmp[i] = ' '
+	i++
+	i += copy(tmp[i:], m.t)
+	tmp[i] = '\n'
+	return tmp
+}
+
+func (m *metric) Split(maxSize int) []telegraf.Metric {
+	if m.Len() < maxSize {
+		return []telegraf.Metric{m}
+	}
+	var out []telegraf.Metric
+
+	// constant number of bytes for each metric (in addition to field bytes)
+	constant := len(m.name) + len(m.tags) + len(m.t) + 3
+	// currently selected fields
+	fields := make([]byte, 0, maxSize)
+
+	i := 0
+	for {
+		if i >= len(m.fields) {
+			// hit the end of the field byte slice
+			if len(fields) > 0 {
+				out = append(out, copyWith(m.name, m.tags, fields, m.t))
+			}
+			break
+		}
+
+		// find the end of the next field
+		j := indexUnescapedByte(m.fields[i:], ',')
+		if j == -1 {
+			j = len(m.fields)
+		} else {
+			j += i
+		}
+
+		// if true, then we need to create a metric _not_ including the currently
+		// selected field
+		if len(m.fields[i:j])+len(fields)+constant > maxSize {
+			// if false, then we'll create a metric including the currently
+			// selected field anyways. This means that the given maxSize is too
+			// small for a single field to fit.
+			if len(fields) > 0 {
+				out = append(out, copyWith(m.name, m.tags, fields, m.t))
+			}
+
+			fields = make([]byte, 0, maxSize)
+		}
+		if len(fields) > 0 {
+			fields = append(fields, ',')
+		}
+		fields = append(fields, m.fields[i:j]...)
+
+		i = j + 1
+	}
+	return out
+}
+
+func (m *metric) Fields() map[string]interface{} {
+	fieldMap := map[string]interface{}{}
+	i := 0
+	for {
+		if i >= len(m.fields) {
+			break
+		}
+		// end index of field key
+		i1 := indexUnescapedByte(m.fields[i:], '=')
+		if i1 == -1 {
+			break
+		}
+		// start index of field value
+		i2 := i1 + 1
+
+		// end index of field value
+		var i3 int
+		if m.fields[i:][i2] == '"' {
+			i3 = indexUnescapedByte(m.fields[i:][i2+1:], '"')
+			if i3 == -1 {
+				i3 = len(m.fields[i:])
+			}
+			i3 += i2 + 2 // increment index to the comma
+		} else {
+			i3 = indexUnescapedByte(m.fields[i:], ',')
+			if i3 == -1 {
+				i3 = len(m.fields[i:])
+			}
+		}
+
+		switch m.fields[i:][i2] {
+		case '"':
+			// string field
+			fieldMap[unescape(string(m.fields[i:][0:i1]), "fieldkey")] = unescape(string(m.fields[i:][i2+1:i3-1]), "fieldval")
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			// number field
+			switch m.fields[i:][i3-1] {
+			case 'i':
+				// integer field
+				n, err := parseIntBytes(m.fields[i:][i2:i3-1], 10, 64)
+				if err == nil {
+					fieldMap[unescape(string(m.fields[i:][0:i1]), "fieldkey")] = n
+				} else {
+					// TODO handle error or just ignore field silently?
+				}
+			default:
+				// float field
+				n, err := parseFloatBytes(m.fields[i:][i2:i3], 64)
+				if err == nil {
+					fieldMap[unescape(string(m.fields[i:][0:i1]), "fieldkey")] = n
+				} else {
+					// TODO handle error or just ignore field silently?
+				}
+			}
+		case 'T', 't':
+			fieldMap[unescape(string(m.fields[i:][0:i1]), "fieldkey")] = true
+		case 'F', 'f':
+			fieldMap[unescape(string(m.fields[i:][0:i1]), "fieldkey")] = false
+		default:
+			// TODO handle unsupported field type
+		}
+
+		i += i3 + 1
+	}
+
+	return fieldMap
+}
+
+func (m *metric) Tags() map[string]string {
+	tagMap := map[string]string{}
+	if len(m.tags) == 0 {
+		return tagMap
+	}
+
+	i := 0
+	for {
+		// start index of tag key
+		i0 := indexUnescapedByte(m.tags[i:], ',') + 1
+		if i0 == 0 {
+			// didn't find a tag start
+			break
+		}
+		// end index of tag key
+		i1 := indexUnescapedByte(m.tags[i:], '=')
+		// start index of tag value
+		i2 := i1 + 1
+		// end index of tag value (starting from i2)
+		i3 := indexUnescapedByte(m.tags[i+i2:], ',')
+		if i3 == -1 {
+			tagMap[unescape(string(m.tags[i:][i0:i1]), "tagkey")] = unescape(string(m.tags[i:][i2:]), "tagval")
+			break
+		}
+		tagMap[unescape(string(m.tags[i:][i0:i1]), "tagkey")] = unescape(string(m.tags[i:][i2:i2+i3]), "tagval")
+		// increment start index for the next tag
+		i += i2 + i3
+	}
+
+	return tagMap
+}
+
+func (m *metric) Name() string {
+	return unescape(string(m.name), "name")
+}
+
+func (m *metric) Time() time.Time {
+	// assume metric has been verified already and ignore error:
+	if m.nsec == 0 {
+		m.nsec, _ = parseIntBytes(m.t, 10, 64)
+	}
+	return time.Unix(0, m.nsec)
+}
+
+func (m *metric) UnixNano() int64 {
+	// assume metric has been verified already and ignore error:
+	if m.nsec == 0 {
+		m.nsec, _ = parseIntBytes(m.t, 10, 64)
+	}
+	return m.nsec
+}
+
+func (m *metric) SetName(name string) {
+	m.hashID = 0
+	m.name = []byte(nameEscaper.Replace(name))
+}
+
+func (m *metric) SetPrefix(prefix string) {
+	m.hashID = 0
+	m.name = append([]byte(nameEscaper.Replace(prefix)), m.name...)
+}
+
+func (m *metric) SetSuffix(suffix string) {
+	m.hashID = 0
+	m.name = append(m.name, []byte(nameEscaper.Replace(suffix))...)
+}
+
+func (m *metric) AddTag(key, value string) {
+	m.RemoveTag(key)
+	m.tags = append(m.tags, []byte(","+escape(key, "tagkey")+"="+escape(value, "tagval"))...)
+}
+
+func (m *metric) HasTag(key string) bool {
+	i := bytes.Index(m.tags, []byte(escape(key, "tagkey")+"="))
+	if i == -1 {
+		return false
+	}
+	return true
+}
+
+func (m *metric) RemoveTag(key string) {
+	m.hashID = 0
+
+	i := bytes.Index(m.tags, []byte(escape(key, "tagkey")+"="))
+	if i == -1 {
+		return
+	}
+
+	tmp := m.tags[0 : i-1]
+	j := indexUnescapedByte(m.tags[i:], ',')
+	if j != -1 {
+		tmp = append(tmp, m.tags[i+j:]...)
+	}
+	m.tags = tmp
+	return
+}
+
+func (m *metric) AddField(key string, value interface{}) {
+	m.fields = append(m.fields, ',')
+	m.fields = appendField(m.fields, key, value)
+}
+
+func (m *metric) HasField(key string) bool {
+	i := bytes.Index(m.fields, []byte(escape(key, "tagkey")+"="))
+	if i == -1 {
+		return false
+	}
+	return true
+}
+
+func (m *metric) RemoveField(key string) error {
+	i := bytes.Index(m.fields, []byte(escape(key, "tagkey")+"="))
+	if i == -1 {
+		return nil
+	}
+
+	var tmp []byte
+	if i != 0 {
+		tmp = m.fields[0 : i-1]
+	}
+	j := indexUnescapedByte(m.fields[i:], ',')
+	if j != -1 {
+		tmp = append(tmp, m.fields[i+j:]...)
+	}
+
+	if len(tmp) == 0 {
+		return fmt.Errorf("Metric cannot remove final field: %s", m.fields)
+	}
+
+	m.fields = tmp
+	return nil
+}
+
+func (m *metric) Copy() telegraf.Metric {
+	return copyWith(m.name, m.tags, m.fields, m.t)
+}
+
+func copyWith(name, tags, fields, t []byte) telegraf.Metric {
+	out := metric{
+		name:   make([]byte, len(name)),
+		tags:   make([]byte, len(tags)),
+		fields: make([]byte, len(fields)),
+		t:      make([]byte, len(t)),
+	}
+	copy(out.name, name)
+	copy(out.tags, tags)
+	copy(out.fields, fields)
+	copy(out.t, t)
+	return &out
+}
+
+func (m *metric) HashID() uint64 {
+	if m.hashID == 0 {
+		h := fnv.New64a()
+		h.Write(m.name)
+
+		tags := m.Tags()
+		tmp := make([]string, len(tags))
+		i := 0
+		for k, v := range tags {
+			tmp[i] = k + v
+			i++
+		}
+		sort.Strings(tmp)
+
+		for _, s := range tmp {
+			h.Write([]byte(s))
+		}
+
+		m.hashID = h.Sum64()
+	}
+	return m.hashID
+}
+
+func appendField(b []byte, k string, v interface{}) []byte {
+	if v == nil {
+		return b
+	}
+	b = append(b, []byte(escape(k, "tagkey")+"=")...)
+
+	// check popular types first
+	switch v := v.(type) {
+	case float64:
+		b = strconv.AppendFloat(b, v, 'f', -1, 64)
+	case int64:
+		b = strconv.AppendInt(b, v, 10)
+		b = append(b, 'i')
+	case string:
+		b = append(b, '"')
+		b = append(b, []byte(escape(v, "fieldval"))...)
+		b = append(b, '"')
+	case bool:
+		b = strconv.AppendBool(b, v)
+	case int32:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case int16:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case int8:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case int:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case uint64:
+		// Cap uints above the maximum int value
+		var intv int64
+		if v <= uint64(MaxInt) {
+			intv = int64(v)
+		} else {
+			intv = int64(MaxInt)
+		}
+		b = strconv.AppendInt(b, intv, 10)
+		b = append(b, 'i')
+	case uint32:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case uint16:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case uint8:
+		b = strconv.AppendInt(b, int64(v), 10)
+		b = append(b, 'i')
+	case uint:
+		// Cap uints above the maximum int value
+		var intv int64
+		if v <= uint(MaxInt) {
+			intv = int64(v)
+		} else {
+			intv = int64(MaxInt)
+		}
+		b = strconv.AppendInt(b, intv, 10)
+		b = append(b, 'i')
+	case float32:
+		b = strconv.AppendFloat(b, float64(v), 'f', -1, 32)
+	case []byte:
+		b = append(b, v...)
+	default:
+		// Can't determine the type, so convert to string
+		b = append(b, '"')
+		b = append(b, []byte(escape(fmt.Sprintf("%v", v), "fieldval"))...)
+		b = append(b, '"')
+	}
+
+	return b
+}

metric/metric_benchmark_test.go

@@ -0,0 +1,148 @@
+package metric
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+)
+
+// vars for making sure that the compiler doesnt optimize out the benchmarks:
+var (
+	s      string
+	I      interface{}
+	tags   map[string]string
+	fields map[string]interface{}
+)
+
+func BenchmarkNewMetric(b *testing.B) {
+	var mt telegraf.Metric
+	for n := 0; n < b.N; n++ {
+		mt, _ = New("test_metric",
+			map[string]string{
+				"test_tag_1": "tag_value_1",
+				"test_tag_2": "tag_value_2",
+				"test_tag_3": "tag_value_3",
+			},
+			map[string]interface{}{
+				"string_field": "string",
+				"int_field":    int64(1000),
+				"float_field":  float64(2.1),
+			},
+			time.Now(),
+		)
+	}
+	s = string(mt.String())
+}
+
+func BenchmarkAddTag(b *testing.B) {
+	var mt telegraf.Metric
+	mt = &metric{
+		name:   []byte("cpu"),
+		tags:   []byte(",host=localhost"),
+		fields: []byte("a=101"),
+		t:      []byte("1480614053000000000"),
+	}
+	for n := 0; n < b.N; n++ {
+		mt.AddTag("foo", "bar")
+	}
+	s = string(mt.String())
+}
+
+func BenchmarkSplit(b *testing.B) {
+	var mt telegraf.Metric
+	mt = &metric{
+		name:   []byte("cpu"),
+		tags:   []byte(",host=localhost"),
+		fields: []byte("a=101,b=10i,c=10101,d=101010,e=42"),
+		t:      []byte("1480614053000000000"),
+	}
+	var metrics []telegraf.Metric
+	for n := 0; n < b.N; n++ {
+		metrics = mt.Split(60)
+	}
+	s = string(metrics[0].String())
+}
+
+func BenchmarkTags(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		var mt, _ = New("test_metric",
+			map[string]string{
+				"test_tag_1": "tag_value_1",
+				"test_tag_2": "tag_value_2",
+				"test_tag_3": "tag_value_3",
+			},
+			map[string]interface{}{
+				"string_field": "string",
+				"int_field":    int64(1000),
+				"float_field":  float64(2.1),
+			},
+			time.Now(),
+		)
+		tags = mt.Tags()
+	}
+	s = fmt.Sprint(tags)
+}
+
+func BenchmarkFields(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		var mt, _ = New("test_metric",
+			map[string]string{
+				"test_tag_1": "tag_value_1",
+				"test_tag_2": "tag_value_2",
+				"test_tag_3": "tag_value_3",
+			},
+			map[string]interface{}{
+				"string_field": "string",
+				"int_field":    int64(1000),
+				"float_field":  float64(2.1),
+			},
+			time.Now(),
+		)
+		fields = mt.Fields()
+	}
+	s = fmt.Sprint(fields)
+}
+
+func BenchmarkString(b *testing.B) {
+	mt, _ := New("test_metric",
+		map[string]string{
+			"test_tag_1": "tag_value_1",
+			"test_tag_2": "tag_value_2",
+			"test_tag_3": "tag_value_3",
+		},
+		map[string]interface{}{
+			"string_field": "string",
+			"int_field":    int64(1000),
+			"float_field":  float64(2.1),
+		},
+		time.Now(),
+	)
+	var S string
+	for n := 0; n < b.N; n++ {
+		S = mt.String()
+	}
+	s = S
+}
+
+func BenchmarkSerialize(b *testing.B) {
+	mt, _ := New("test_metric",
+		map[string]string{
+			"test_tag_1": "tag_value_1",
+			"test_tag_2": "tag_value_2",
+			"test_tag_3": "tag_value_3",
+		},
+		map[string]interface{}{
+			"string_field": "string",
+			"int_field":    int64(1000),
+			"float_field":  float64(2.1),
+		},
+		time.Now(),
+	)
+	var B []byte
+	for n := 0; n < b.N; n++ {
+		B = mt.Serialize()
+	}
+	s = string(B)
+}

metric/metric_test.go

@@ -0,0 +1,646 @@
+package metric
+
+import (
+	"fmt"
+	"math"
+	"regexp"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewMetric(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host":       "localhost",
+		"datacenter": "us-east-1",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+		"usage_busy": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.Equal(t, telegraf.Untyped, m.Type())
+	assert.Equal(t, tags, m.Tags())
+	assert.Equal(t, fields, m.Fields())
+	assert.Equal(t, "cpu", m.Name())
+	assert.Equal(t, now, m.Time())
+	assert.Equal(t, now.UnixNano(), m.UnixNano())
+}
+
+func TestNewErrors(t *testing.T) {
+	// creating a metric with an empty name produces an error:
+	m, err := New(
+		"",
+		map[string]string{
+			"datacenter": "us-east-1",
+			"mytag":      "foo",
+			"another":    "tag",
+		},
+		map[string]interface{}{
+			"value": float64(1),
+		},
+		time.Now(),
+	)
+	assert.Error(t, err)
+	assert.Nil(t, m)
+
+	// creating a metric with empty fields produces an error:
+	m, err = New(
+		"foobar",
+		map[string]string{
+			"datacenter": "us-east-1",
+			"mytag":      "foo",
+			"another":    "tag",
+		},
+		map[string]interface{}{},
+		time.Now(),
+	)
+	assert.Error(t, err)
+	assert.Nil(t, m)
+}
+
+func TestNewMetric_Tags(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{
+		"host":       "localhost",
+		"datacenter": "us-east-1",
+	}
+	fields := map[string]interface{}{
+		"value": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.True(t, m.HasTag("host"))
+	assert.True(t, m.HasTag("datacenter"))
+
+	m.AddTag("newtag", "foo")
+	assert.True(t, m.HasTag("newtag"))
+
+	m.RemoveTag("host")
+	assert.False(t, m.HasTag("host"))
+	assert.True(t, m.HasTag("newtag"))
+	assert.True(t, m.HasTag("datacenter"))
+
+	m.RemoveTag("datacenter")
+	assert.False(t, m.HasTag("datacenter"))
+	assert.True(t, m.HasTag("newtag"))
+	assert.Equal(t, map[string]string{"newtag": "foo"}, m.Tags())
+
+	m.RemoveTag("newtag")
+	assert.False(t, m.HasTag("newtag"))
+	assert.Equal(t, map[string]string{}, m.Tags())
+
+	assert.Equal(t, "cpu value=1 "+fmt.Sprint(now.UnixNano())+"\n", m.String())
+}
+
+func TestSerialize(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{
+		"datacenter": "us-east-1",
+	}
+	fields := map[string]interface{}{
+		"value": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.Equal(t,
+		[]byte("cpu,datacenter=us-east-1 value=1 "+fmt.Sprint(now.UnixNano())+"\n"),
+		m.Serialize())
+
+	m.RemoveTag("datacenter")
+	assert.Equal(t,
+		[]byte("cpu value=1 "+fmt.Sprint(now.UnixNano())+"\n"),
+		m.Serialize())
+}
+
+func TestHashID(t *testing.T) {
+	m, _ := New(
+		"cpu",
+		map[string]string{
+			"datacenter": "us-east-1",
+			"mytag":      "foo",
+			"another":    "tag",
+		},
+		map[string]interface{}{
+			"value": float64(1),
+		},
+		time.Now(),
+	)
+	hash := m.HashID()
+
+	// adding a field doesn't change the hash:
+	m.AddField("foo", int64(100))
+	assert.Equal(t, hash, m.HashID())
+
+	// removing a non-existent tag doesn't change the hash:
+	m.RemoveTag("no-op")
+	assert.Equal(t, hash, m.HashID())
+
+	// adding a tag does change it:
+	m.AddTag("foo", "bar")
+	assert.NotEqual(t, hash, m.HashID())
+	hash = m.HashID()
+
+	// removing a tag also changes it:
+	m.RemoveTag("mytag")
+	assert.NotEqual(t, hash, m.HashID())
+}
+
+func TestHashID_Consistency(t *testing.T) {
+	m, _ := New(
+		"cpu",
+		map[string]string{
+			"datacenter": "us-east-1",
+			"mytag":      "foo",
+			"another":    "tag",
+		},
+		map[string]interface{}{
+			"value": float64(1),
+		},
+		time.Now(),
+	)
+	hash := m.HashID()
+
+	for i := 0; i < 1000; i++ {
+		m2, _ := New(
+			"cpu",
+			map[string]string{
+				"datacenter": "us-east-1",
+				"mytag":      "foo",
+				"another":    "tag",
+			},
+			map[string]interface{}{
+				"value": float64(1),
+			},
+			time.Now(),
+		)
+		assert.Equal(t, hash, m2.HashID())
+	}
+}
+
+func TestNewMetric_NameModifiers(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{}
+	fields := map[string]interface{}{
+		"value": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	hash := m.HashID()
+	suffix := fmt.Sprintf(" value=1 %d\n", now.UnixNano())
+	assert.Equal(t, "cpu"+suffix, m.String())
+
+	m.SetPrefix("pre_")
+	assert.NotEqual(t, hash, m.HashID())
+	hash = m.HashID()
+	assert.Equal(t, "pre_cpu"+suffix, m.String())
+
+	m.SetSuffix("_post")
+	assert.NotEqual(t, hash, m.HashID())
+	hash = m.HashID()
+	assert.Equal(t, "pre_cpu_post"+suffix, m.String())
+
+	m.SetName("mem")
+	assert.NotEqual(t, hash, m.HashID())
+	assert.Equal(t, "mem"+suffix, m.String())
+}
+
+func TestNewMetric_FieldModifiers(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"value": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.True(t, m.HasField("value"))
+	assert.False(t, m.HasField("foo"))
+
+	m.AddField("newfield", "foo")
+	assert.True(t, m.HasField("newfield"))
+
+	assert.NoError(t, m.RemoveField("newfield"))
+	assert.False(t, m.HasField("newfield"))
+
+	// don't allow user to remove all fields:
+	assert.Error(t, m.RemoveField("value"))
+
+	m.AddField("value2", int64(101))
+	assert.NoError(t, m.RemoveField("value"))
+	assert.False(t, m.HasField("value"))
+}
+
+func TestNewMetric_Fields(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float":  float64(1),
+		"int":    int64(1),
+		"bool":   true,
+		"false":  false,
+		"string": "test",
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.Equal(t, fields, m.Fields())
+}
+
+func TestNewMetric_Time(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float":  float64(1),
+		"int":    int64(1),
+		"bool":   true,
+		"false":  false,
+		"string": "test",
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+	m = m.Copy()
+	m2 := m.Copy()
+
+	assert.Equal(t, now.UnixNano(), m.Time().UnixNano())
+	assert.Equal(t, now.UnixNano(), m2.UnixNano())
+}
+
+func TestNewMetric_Copy(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{}
+	fields := map[string]interface{}{
+		"float": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+	m2 := m.Copy()
+
+	assert.Equal(t,
+		fmt.Sprintf("cpu float=1 %d\n", now.UnixNano()),
+		m.String())
+	m.AddTag("host", "localhost")
+	assert.Equal(t,
+		fmt.Sprintf("cpu,host=localhost float=1 %d\n", now.UnixNano()),
+		m.String())
+
+	assert.Equal(t,
+		fmt.Sprintf("cpu float=1 %d\n", now.UnixNano()),
+		m2.String())
+}
+
+func TestNewMetric_AllTypes(t *testing.T) {
+	now := time.Now()
+	tags := map[string]string{}
+	fields := map[string]interface{}{
+		"float64":     float64(1),
+		"float32":     float32(1),
+		"int64":       int64(1),
+		"int32":       int32(1),
+		"int16":       int16(1),
+		"int8":        int8(1),
+		"int":         int(1),
+		"uint64":      uint64(1),
+		"uint32":      uint32(1),
+		"uint16":      uint16(1),
+		"uint8":       uint8(1),
+		"uint":        uint(1),
+		"bytes":       []byte("foo"),
+		"nil":         nil,
+		"maxuint64":   uint64(MaxInt) + 10,
+		"maxuint":     uint(MaxInt) + 10,
+		"unsupported": []int{1, 2},
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.Contains(t, m.String(), "float64=1")
+	assert.Contains(t, m.String(), "float32=1")
+	assert.Contains(t, m.String(), "int64=1i")
+	assert.Contains(t, m.String(), "int32=1i")
+	assert.Contains(t, m.String(), "int16=1i")
+	assert.Contains(t, m.String(), "int8=1i")
+	assert.Contains(t, m.String(), "int=1i")
+	assert.Contains(t, m.String(), "uint64=1i")
+	assert.Contains(t, m.String(), "uint32=1i")
+	assert.Contains(t, m.String(), "uint16=1i")
+	assert.Contains(t, m.String(), "uint8=1i")
+	assert.Contains(t, m.String(), "uint=1i")
+	assert.NotContains(t, m.String(), "nil")
+	assert.Contains(t, m.String(), fmt.Sprintf("maxuint64=%di", MaxInt))
+	assert.Contains(t, m.String(), fmt.Sprintf("maxuint=%di", MaxInt))
+}
+
+func TestIndexUnescapedByte(t *testing.T) {
+	tests := []struct {
+		in       []byte
+		b        byte
+		expected int
+	}{
+		{
+			in:       []byte(`foobar`),
+			b:        'b',
+			expected: 3,
+		},
+		{
+			in:       []byte(`foo\bar`),
+			b:        'b',
+			expected: -1,
+		},
+		{
+			in:       []byte(`foo\\bar`),
+			b:        'b',
+			expected: 5,
+		},
+		{
+			in:       []byte(`foobar`),
+			b:        'f',
+			expected: 0,
+		},
+		{
+			in:       []byte(`foobar`),
+			b:        'r',
+			expected: 5,
+		},
+		{
+			in:       []byte(`\foobar`),
+			b:        'f',
+			expected: -1,
+		},
+	}
+
+	for _, test := range tests {
+		got := indexUnescapedByte(test.in, test.b)
+		assert.Equal(t, test.expected, got)
+	}
+}
+
+func TestNewGaugeMetric(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host":       "localhost",
+		"datacenter": "us-east-1",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+		"usage_busy": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now, telegraf.Gauge)
+	assert.NoError(t, err)
+
+	assert.Equal(t, telegraf.Gauge, m.Type())
+	assert.Equal(t, tags, m.Tags())
+	assert.Equal(t, fields, m.Fields())
+	assert.Equal(t, "cpu", m.Name())
+	assert.Equal(t, now, m.Time())
+	assert.Equal(t, now.UnixNano(), m.UnixNano())
+}
+
+func TestNewCounterMetric(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host":       "localhost",
+		"datacenter": "us-east-1",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+		"usage_busy": float64(1),
+	}
+	m, err := New("cpu", tags, fields, now, telegraf.Counter)
+	assert.NoError(t, err)
+
+	assert.Equal(t, telegraf.Counter, m.Type())
+	assert.Equal(t, tags, m.Tags())
+	assert.Equal(t, fields, m.Fields())
+	assert.Equal(t, "cpu", m.Name())
+	assert.Equal(t, now, m.Time())
+	assert.Equal(t, now.UnixNano(), m.UnixNano())
+}
+
+// test splitting metric into various max lengths
+func TestSplitMetric(t *testing.T) {
+	now := time.Unix(0, 1480940990034083306)
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float":  float64(100001),
+		"int":    int64(100001),
+		"bool":   true,
+		"false":  false,
+		"string": "test",
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	split80 := m.Split(80)
+	assert.Len(t, split80, 2)
+
+	split70 := m.Split(70)
+	assert.Len(t, split70, 3)
+
+	split60 := m.Split(60)
+	assert.Len(t, split60, 4)
+}
+
+// test splitting metric into various max lengths
+// use a simple regex check to verify that the split metrics are valid
+func TestSplitMetric_RegexVerify(t *testing.T) {
+	now := time.Unix(0, 1480940990034083306)
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"foo":     float64(98934259085),
+		"bar":     float64(19385292),
+		"number":  float64(19385292),
+		"another": float64(19385292),
+		"n":       float64(19385292),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	// verification regex
+	re := regexp.MustCompile(`cpu,host=localhost \w+=\d+(,\w+=\d+)* 1480940990034083306`)
+
+	split90 := m.Split(90)
+	assert.Len(t, split90, 2)
+	for _, splitM := range split90 {
+		assert.True(t, re.Match(splitM.Serialize()), splitM.String())
+	}
+
+	split70 := m.Split(70)
+	assert.Len(t, split70, 3)
+	for _, splitM := range split70 {
+		assert.True(t, re.Match(splitM.Serialize()), splitM.String())
+	}
+
+	split20 := m.Split(20)
+	assert.Len(t, split20, 5)
+	for _, splitM := range split20 {
+		assert.True(t, re.Match(splitM.Serialize()), splitM.String())
+	}
+}
+
+// test splitting metric even when given length is shorter than
+// shortest possible length
+// Split should split metric as short as possible, ie, 1 field per metric
+func TestSplitMetric_TooShort(t *testing.T) {
+	now := time.Unix(0, 1480940990034083306)
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float":  float64(100001),
+		"int":    int64(100001),
+		"bool":   true,
+		"false":  false,
+		"string": "test",
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	split := m.Split(10)
+	assert.Len(t, split, 5)
+	strings := make([]string, 5)
+	for i, splitM := range split {
+		strings[i] = splitM.String()
+	}
+
+	assert.Contains(t, strings, "cpu,host=localhost float=100001 1480940990034083306\n")
+	assert.Contains(t, strings, "cpu,host=localhost int=100001i 1480940990034083306\n")
+	assert.Contains(t, strings, "cpu,host=localhost bool=true 1480940990034083306\n")
+	assert.Contains(t, strings, "cpu,host=localhost false=false 1480940990034083306\n")
+	assert.Contains(t, strings, "cpu,host=localhost string=\"test\" 1480940990034083306\n")
+}
+
+func TestSplitMetric_NoOp(t *testing.T) {
+	now := time.Unix(0, 1480940990034083306)
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float":  float64(100001),
+		"int":    int64(100001),
+		"bool":   true,
+		"false":  false,
+		"string": "test",
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	split := m.Split(1000)
+	assert.Len(t, split, 1)
+	assert.Equal(t, m, split[0])
+}
+
+func TestSplitMetric_OneField(t *testing.T) {
+	now := time.Unix(0, 1480940990034083306)
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"float": float64(100001),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.Equal(t, "cpu,host=localhost float=100001 1480940990034083306\n", m.String())
+
+	split := m.Split(1000)
+	assert.Len(t, split, 1)
+	assert.Equal(t, "cpu,host=localhost float=100001 1480940990034083306\n", split[0].String())
+
+	split = m.Split(1)
+	assert.Len(t, split, 1)
+	assert.Equal(t, "cpu,host=localhost float=100001 1480940990034083306\n", split[0].String())
+
+	split = m.Split(40)
+	assert.Len(t, split, 1)
+	assert.Equal(t, "cpu,host=localhost float=100001 1480940990034083306\n", split[0].String())
+}
+
+func TestNewMetricAggregate(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	assert.False(t, m.IsAggregate())
+	m.SetAggregate(true)
+	assert.True(t, m.IsAggregate())
+}
+
+func TestNewMetricPoint(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	p := m.Point()
+
+	assert.Equal(t, fields, m.Fields())
+	assert.Equal(t, fields, p.Fields())
+	assert.Equal(t, "cpu", p.Name())
+}
+
+func TestNewMetricString(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": float64(99),
+	}
+	m, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+
+	lineProto := fmt.Sprintf("cpu,host=localhost usage_idle=99 %d\n",
+		now.UnixNano())
+	assert.Equal(t, lineProto, m.String())
+}
+
+func TestNewMetricFailNaN(t *testing.T) {
+	now := time.Now()
+
+	tags := map[string]string{
+		"host": "localhost",
+	}
+	fields := map[string]interface{}{
+		"usage_idle": math.NaN(),
+	}
+
+	_, err := New("cpu", tags, fields, now)
+	assert.NoError(t, err)
+}

metric/parse.go

@@ -0,0 +1,627 @@
+package metric
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/influxdata/telegraf"
+)
+
+var (
+	ErrInvalidNumber = errors.New("invalid number")
+)
+
+const (
+	// the number of characters for the largest possible int64 (9223372036854775807)
+	maxInt64Digits = 19
+
+	// the number of characters for the smallest possible int64 (-9223372036854775808)
+	minInt64Digits = 20
+
+	// the number of characters required for the largest float64 before a range check
+	// would occur during parsing
+	maxFloat64Digits = 25
+
+	// the number of characters required for smallest float64 before a range check occur
+	// would occur during parsing
+	minFloat64Digits = 27
+
+	MaxKeyLength = 65535
+)
+
+// The following constants allow us to specify which state to move to
+// next, when scanning sections of a Point.
+const (
+	tagKeyState = iota
+	tagValueState
+	fieldsState
+)
+
+func Parse(buf []byte) ([]telegraf.Metric, error) {
+	return ParseWithDefaultTime(buf, time.Now())
+}
+
+func ParseWithDefaultTime(buf []byte, t time.Time) ([]telegraf.Metric, error) {
+	if len(buf) <= 6 {
+		return []telegraf.Metric{}, makeError("buffer too short", buf, 0)
+	}
+	metrics := make([]telegraf.Metric, 0, bytes.Count(buf, []byte("\n"))+1)
+	var errStr string
+	i := 0
+	for {
+		j := bytes.IndexByte(buf[i:], '\n')
+		if j == -1 {
+			break
+		}
+		if len(buf[i:i+j]) < 2 {
+			i += j + 1 // increment i past the previous newline
+			continue
+		}
+
+		m, err := parseMetric(buf[i:i+j], t)
+		if err != nil {
+			i += j + 1 // increment i past the previous newline
+			errStr += " " + err.Error()
+			continue
+		}
+		i += j + 1 // increment i past the previous newline
+
+		metrics = append(metrics, m)
+	}
+
+	if len(errStr) > 0 {
+		return metrics, fmt.Errorf(errStr)
+	}
+	return metrics, nil
+}
+
+func parseMetric(buf []byte, defaultTime time.Time) (telegraf.Metric, error) {
+	var dTime string
+	// scan the first block which is measurement[,tag1=value1,tag2=value=2...]
+	pos, key, err := scanKey(buf, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	// measurement name is required
+	if len(key) == 0 {
+		return nil, fmt.Errorf("missing measurement")
+	}
+
+	if len(key) > MaxKeyLength {
+		return nil, fmt.Errorf("max key length exceeded: %v > %v", len(key), MaxKeyLength)
+	}
+
+	// scan the second block is which is field1=value1[,field2=value2,...]
+	pos, fields, err := scanFields(buf, pos)
+	if err != nil {
+		return nil, err
+	}
+
+	// at least one field is required
+	if len(fields) == 0 {
+		return nil, fmt.Errorf("missing fields")
+	}
+
+	// scan the last block which is an optional integer timestamp
+	pos, ts, err := scanTime(buf, pos)
+	if err != nil {
+		return nil, err
+	}
+
+	m := &metric{
+		fields: fields,
+		t:      ts,
+	}
+
+	// parse out the measurement name
+	// namei is the index at which the "name" ends
+	namei := indexUnescapedByte(key, ',')
+	if namei < 1 {
+		// no tags
+		m.name = key
+	} else {
+		m.name = key[0:namei]
+		m.tags = key[namei:]
+	}
+
+	if len(m.t) == 0 {
+		if len(dTime) == 0 {
+			dTime = fmt.Sprint(defaultTime.UnixNano())
+		}
+		// use default time
+		m.t = []byte(dTime)
+	}
+
+	// here we copy on return because this allows us to later call
+	// AddTag, AddField, RemoveTag, RemoveField, etc. without worrying about
+	// modifying 'tag' bytes having an affect on 'field' bytes, for example.
+	return m.Copy(), nil
+}
+
+// scanKey scans buf starting at i for the measurement and tag portion of the point.
+// It returns the ending position and the byte slice of key within buf.  If there
+// are tags, they will be sorted if they are not already.
+func scanKey(buf []byte, i int) (int, []byte, error) {
+	start := skipWhitespace(buf, i)
+	i = start
+
+	// First scan the Point's measurement.
+	state, i, err := scanMeasurement(buf, i)
+	if err != nil {
+		return i, buf[start:i], err
+	}
+
+	// Optionally scan tags if needed.
+	if state == tagKeyState {
+		i, err = scanTags(buf, i)
+		if err != nil {
+			return i, buf[start:i], err
+		}
+	}
+
+	return i, buf[start:i], nil
+}
+
+// scanMeasurement examines the measurement part of a Point, returning
+// the next state to move to, and the current location in the buffer.
+func scanMeasurement(buf []byte, i int) (int, int, error) {
+	// Check first byte of measurement, anything except a comma is fine.
+	// It can't be a space, since whitespace is stripped prior to this
+	// function call.
+	if i >= len(buf) || buf[i] == ',' {
+		return -1, i, makeError("missing measurement", buf, i)
+	}
+
+	for {
+		i++
+		if i >= len(buf) {
+			// cpu
+			return -1, i, makeError("missing fields", buf, i)
+		}
+
+		if buf[i-1] == '\\' {
+			// Skip character (it's escaped).
+			continue
+		}
+
+		// Unescaped comma; move onto scanning the tags.
+		if buf[i] == ',' {
+			return tagKeyState, i + 1, nil
+		}
+
+		// Unescaped space; move onto scanning the fields.
+		if buf[i] == ' ' {
+			// cpu value=1.0
+			return fieldsState, i, nil
+		}
+	}
+}
+
+// scanTags examines all the tags in a Point, keeping track of and
+// returning the updated indices slice, number of commas and location
+// in buf where to start examining the Point fields.
+func scanTags(buf []byte, i int) (int, error) {
+	var (
+		err   error
+		state = tagKeyState
+	)
+
+	for {
+		switch state {
+		case tagKeyState:
+			i, err = scanTagsKey(buf, i)
+			state = tagValueState // tag value always follows a tag key
+		case tagValueState:
+			state, i, err = scanTagsValue(buf, i)
+		case fieldsState:
+			return i, nil
+		}
+
+		if err != nil {
+			return i, err
+		}
+	}
+}
+
+// scanTagsKey scans each character in a tag key.
+func scanTagsKey(buf []byte, i int) (int, error) {
+	// First character of the key.
+	if i >= len(buf) || buf[i] == ' ' || buf[i] == ',' || buf[i] == '=' {
+		// cpu,{'', ' ', ',', '='}
+		return i, makeError("missing tag key", buf, i)
+	}
+
+	// Examine each character in the tag key until we hit an unescaped
+	// equals (the tag value), or we hit an error (i.e., unescaped
+	// space or comma).
+	for {
+		i++
+
+		// Either we reached the end of the buffer or we hit an
+		// unescaped comma or space.
+		if i >= len(buf) ||
+			((buf[i] == ' ' || buf[i] == ',') && buf[i-1] != '\\') {
+			// cpu,tag{'', ' ', ','}
+			return i, makeError("missing tag value", buf, i)
+		}
+
+		if buf[i] == '=' && buf[i-1] != '\\' {
+			// cpu,tag=
+			return i + 1, nil
+		}
+	}
+}
+
+// scanTagsValue scans each character in a tag value.
+func scanTagsValue(buf []byte, i int) (int, int, error) {
+	// Tag value cannot be empty.
+	if i >= len(buf) || buf[i] == ',' || buf[i] == ' ' {
+		// cpu,tag={',', ' '}
+		return -1, i, makeError("missing tag value", buf, i)
+	}
+
+	// Examine each character in the tag value until we hit an unescaped
+	// comma (move onto next tag key), an unescaped space (move onto
+	// fields), or we error out.
+	for {
+		i++
+		if i >= len(buf) {
+			// cpu,tag=value
+			return -1, i, makeError("missing fields", buf, i)
+		}
+
+		// An unescaped equals sign is an invalid tag value.
+		if buf[i] == '=' && buf[i-1] != '\\' {
+			// cpu,tag={'=', 'fo=o'}
+			return -1, i, makeError("invalid tag format", buf, i)
+		}
+
+		if buf[i] == ',' && buf[i-1] != '\\' {
+			// cpu,tag=foo,
+			return tagKeyState, i + 1, nil
+		}
+
+		// cpu,tag=foo value=1.0
+		// cpu, tag=foo\= value=1.0
+		if buf[i] == ' ' && buf[i-1] != '\\' {
+			return fieldsState, i, nil
+		}
+	}
+}
+
+// scanFields scans buf, starting at i for the fields section of a point.  It returns
+// the ending position and the byte slice of the fields within buf
+func scanFields(buf []byte, i int) (int, []byte, error) {
+	start := skipWhitespace(buf, i)
+	i = start
+	quoted := false
+
+	// tracks how many '=' we've seen
+	equals := 0
+
+	// tracks how many commas we've seen
+	commas := 0
+
+	for {
+		// reached the end of buf?
+		if i >= len(buf) {
+			break
+		}
+
+		// escaped characters?
+		if buf[i] == '\\' && i+1 < len(buf) {
+			i += 2
+			continue
+		}
+
+		// If the value is quoted, scan until we get to the end quote
+		// Only quote values in the field value since quotes are not significant
+		// in the field key
+		if buf[i] == '"' && equals > commas {
+			quoted = !quoted
+			i++
+			continue
+		}
+
+		// If we see an =, ensure that there is at least on char before and after it
+		if buf[i] == '=' && !quoted {
+			equals++
+
+			// check for "... =123" but allow "a\ =123"
+			if buf[i-1] == ' ' && buf[i-2] != '\\' {
+				return i, buf[start:i], makeError("missing field key", buf, i)
+			}
+
+			// check for "...a=123,=456" but allow "a=123,a\,=456"
+			if buf[i-1] == ',' && buf[i-2] != '\\' {
+				return i, buf[start:i], makeError("missing field key", buf, i)
+			}
+
+			// check for "... value="
+			if i+1 >= len(buf) {
+				return i, buf[start:i], makeError("missing field value", buf, i)
+			}
+
+			// check for "... value=,value2=..."
+			if buf[i+1] == ',' || buf[i+1] == ' ' {
+				return i, buf[start:i], makeError("missing field value", buf, i)
+			}
+
+			if isNumeric(buf[i+1]) || buf[i+1] == '-' || buf[i+1] == 'N' || buf[i+1] == 'n' {
+				var err error
+				i, err = scanNumber(buf, i+1)
+				if err != nil {
+					return i, buf[start:i], err
+				}
+				continue
+			}
+			// If next byte is not a double-quote, the value must be a boolean
+			if buf[i+1] != '"' {
+				var err error
+				i, _, err = scanBoolean(buf, i+1)
+				if err != nil {
+					return i, buf[start:i], err
+				}
+				continue
+			}
+		}
+
+		if buf[i] == ',' && !quoted {
+			commas++
+		}
+
+		// reached end of block?
+		if buf[i] == ' ' && !quoted {
+			break
+		}
+		i++
+	}
+
+	if quoted {
+		return i, buf[start:i], makeError("unbalanced quotes", buf, i)
+	}
+
+	// check that all field sections had key and values (e.g. prevent "a=1,b"
+	if equals == 0 || commas != equals-1 {
+		return i, buf[start:i], makeError("invalid field format", buf, i)
+	}
+
+	return i, buf[start:i], nil
+}
+
+// scanTime scans buf, starting at i for the time section of a point. It
+// returns the ending position and the byte slice of the timestamp within buf
+// and and error if the timestamp is not in the correct numeric format.
+func scanTime(buf []byte, i int) (int, []byte, error) {
+	start := skipWhitespace(buf, i)
+	i = start
+
+	for {
+		// reached the end of buf?
+		if i >= len(buf) {
+			break
+		}
+
+		// Reached end of block or trailing whitespace?
+		if buf[i] == '\n' || buf[i] == ' ' {
+			break
+		}
+
+		// Handle negative timestamps
+		if i == start && buf[i] == '-' {
+			i++
+			continue
+		}
+
+		// Timestamps should be integers, make sure they are so we don't need
+		// to actually  parse the timestamp until needed.
+		if buf[i] < '0' || buf[i] > '9' {
+			return i, buf[start:i], makeError("invalid timestamp", buf, i)
+		}
+		i++
+	}
+	return i, buf[start:i], nil
+}
+
+func isNumeric(b byte) bool {
+	return (b >= '0' && b <= '9') || b == '.'
+}
+
+// scanNumber returns the end position within buf, start at i after
+// scanning over buf for an integer, or float.  It returns an
+// error if a invalid number is scanned.
+func scanNumber(buf []byte, i int) (int, error) {
+	start := i
+	var isInt bool
+
+	// Is negative number?
+	if i < len(buf) && buf[i] == '-' {
+		i++
+		// There must be more characters now, as just '-' is illegal.
+		if i == len(buf) {
+			return i, ErrInvalidNumber
+		}
+	}
+
+	// how many decimal points we've see
+	decimal := false
+
+	// indicates the number is float in scientific notation
+	scientific := false
+
+	for {
+		if i >= len(buf) {
+			break
+		}
+
+		if buf[i] == ',' || buf[i] == ' ' {
+			break
+		}
+
+		if buf[i] == 'i' && i > start && !isInt {
+			isInt = true
+			i++
+			continue
+		}
+
+		if buf[i] == '.' {
+			// Can't have more than 1 decimal (e.g. 1.1.1 should fail)
+			if decimal {
+				return i, ErrInvalidNumber
+			}
+			decimal = true
+		}
+
+		// `e` is valid for floats but not as the first char
+		if i > start && (buf[i] == 'e' || buf[i] == 'E') {
+			scientific = true
+			i++
+			continue
+		}
+
+		// + and - are only valid at this point if they follow an e (scientific notation)
+		if (buf[i] == '+' || buf[i] == '-') && (buf[i-1] == 'e' || buf[i-1] == 'E') {
+			i++
+			continue
+		}
+
+		// NaN is an unsupported value
+		if i+2 < len(buf) && (buf[i] == 'N' || buf[i] == 'n') {
+			return i, ErrInvalidNumber
+		}
+
+		if !isNumeric(buf[i]) {
+			return i, ErrInvalidNumber
+		}
+		i++
+	}
+
+	if isInt && (decimal || scientific) {
+		return i, ErrInvalidNumber
+	}
+
+	numericDigits := i - start
+	if isInt {
+		numericDigits--
+	}
+	if decimal {
+		numericDigits--
+	}
+	if buf[start] == '-' {
+		numericDigits--
+	}
+
+	if numericDigits == 0 {
+		return i, ErrInvalidNumber
+	}
+
+	// It's more common that numbers will be within min/max range for their type but we need to prevent
+	// out or range numbers from being parsed successfully.  This uses some simple heuristics to decide
+	// if we should parse the number to the actual type.  It does not do it all the time because it incurs
+	// extra allocations and we end up converting the type again when writing points to disk.
+	if isInt {
+		// Make sure the last char is an 'i' for integers (e.g. 9i10 is not valid)
+		if buf[i-1] != 'i' {
+			return i, ErrInvalidNumber
+		}
+		// Parse the int to check bounds the number of digits could be larger than the max range
+		// We subtract 1 from the index to remove the `i` from our tests
+		if len(buf[start:i-1]) >= maxInt64Digits || len(buf[start:i-1]) >= minInt64Digits {
+			if _, err := parseIntBytes(buf[start:i-1], 10, 64); err != nil {
+				return i, makeError(fmt.Sprintf("unable to parse integer %s: %s", buf[start:i-1], err), buf, i)
+			}
+		}
+	} else {
+		// Parse the float to check bounds if it's scientific or the number of digits could be larger than the max range
+		if scientific || len(buf[start:i]) >= maxFloat64Digits || len(buf[start:i]) >= minFloat64Digits {
+			if _, err := parseFloatBytes(buf[start:i], 10); err != nil {
+				return i, makeError("invalid float", buf, i)
+			}
+		}
+	}
+
+	return i, nil
+}
+
+// scanBoolean returns the end position within buf, start at i after
+// scanning over buf for boolean. Valid values for a boolean are
+// t, T, true, TRUE, f, F, false, FALSE. It returns an error if a invalid boolean
+// is scanned.
+func scanBoolean(buf []byte, i int) (int, []byte, error) {
+	start := i
+
+	if i < len(buf) && (buf[i] != 't' && buf[i] != 'f' && buf[i] != 'T' && buf[i] != 'F') {
+		return i, buf[start:i], makeError("invalid value", buf, i)
+	}
+
+	i++
+	for {
+		if i >= len(buf) {
+			break
+		}
+
+		if buf[i] == ',' || buf[i] == ' ' {
+			break
+		}
+		i++
+	}
+
+	// Single char bool (t, T, f, F) is ok
+	if i-start == 1 {
+		return i, buf[start:i], nil
+	}
+
+	// length must be 4 for true or TRUE
+	if (buf[start] == 't' || buf[start] == 'T') && i-start != 4 {
+		return i, buf[start:i], makeError("invalid boolean", buf, i)
+	}
+
+	// length must be 5 for false or FALSE
+	if (buf[start] == 'f' || buf[start] == 'F') && i-start != 5 {
+		return i, buf[start:i], makeError("invalid boolean", buf, i)
+	}
+
+	// Otherwise
+	valid := false
+	switch buf[start] {
+	case 't':
+		valid = bytes.Equal(buf[start:i], []byte("true"))
+	case 'f':
+		valid = bytes.Equal(buf[start:i], []byte("false"))
+	case 'T':
+		valid = bytes.Equal(buf[start:i], []byte("TRUE")) || bytes.Equal(buf[start:i], []byte("True"))
+	case 'F':
+		valid = bytes.Equal(buf[start:i], []byte("FALSE")) || bytes.Equal(buf[start:i], []byte("False"))
+	}
+
+	if !valid {
+		return i, buf[start:i], makeError("invalid boolean", buf, i)
+	}
+
+	return i, buf[start:i], nil
+
+}
+
+// skipWhitespace returns the end position within buf, starting at i after
+// scanning over spaces in tags
+func skipWhitespace(buf []byte, i int) int {
+	for i < len(buf) {
+		if buf[i] != ' ' && buf[i] != '\t' && buf[i] != 0 {
+			break
+		}
+		i++
+	}
+	return i
+}
+
+// makeError is a helper function for making a metric parsing error.
+//   reason is the reason that the error occured.
+//   buf should be the current buffer we are parsing.
+//   i is the current index, to give some context on where in the buffer we are.
+func makeError(reason string, buf []byte, i int) error {
+	return fmt.Errorf("metric parsing error, reason: [%s], buffer: [%s], index: [%d]",
+		reason, buf, i)
+}

metric/parse_test.go

@@ -0,0 +1,355 @@
+package metric
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+const trues = `booltest b=T
+booltest b=t
+booltest b=True
+booltest b=TRUE
+booltest b=true
+`
+
+const falses = `booltest b=F
+booltest b=f
+booltest b=False
+booltest b=FALSE
+booltest b=false
+`
+
+const withEscapes = `w\,\ eather,host=local temp=99 1465839830100400200
+w\,eather,host=local temp=99 1465839830100400200
+weather,location=us\,midwest temperature=82 1465839830100400200
+weather,location=us-midwest temp\=rature=82 1465839830100400200
+weather,location\ place=us-midwest temperature=82 1465839830100400200
+weather,location=us-midwest temperature="too\"hot\"" 1465839830100400200
+`
+
+const withTimestamps = `cpu usage=99 1480595849000000000
+cpu usage=99 1480595850000000000
+cpu usage=99 1480595851700030000
+cpu usage=99 1480595852000000300
+`
+
+const sevenMetrics = `cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+cpu,host=foo,datacenter=us-east idle=99,busy=1i,b=true,s="string"
+`
+
+// some metrics are invalid
+const someInvalid = `cpu,host=foo,datacenter=us-east usage_idle=99,usage_busy=1
+cpu,host=foo,datacenter=us-east usage_idle=99,usage_busy=1
+cpu,host=foo,datacenter=us-east usage_idle=99,usage_busy=1
+cpu,cpu=cpu3, host=foo,datacenter=us-east usage_idle=99,usage_busy=1
+cpu,cpu=cpu4 , usage_idle=99,usage_busy=1
+cpu 1480595852000000300
+cpu usage=99 1480595852foobar300
+cpu,host=foo,datacenter=us-east usage_idle=99,usage_busy=1
+`
+
+func TestParse(t *testing.T) {
+	start := time.Now()
+	metrics, err := Parse([]byte(sevenMetrics))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 7)
+
+	// all metrics parsed together w/o a timestamp should have the same time.
+	firstTime := metrics[0].Time()
+	for _, m := range metrics {
+		assert.Equal(t,
+			map[string]interface{}{
+				"idle": float64(99),
+				"busy": int64(1),
+				"b":    true,
+				"s":    "string",
+			},
+			m.Fields(),
+		)
+		assert.Equal(t,
+			map[string]string{
+				"host":       "foo",
+				"datacenter": "us-east",
+			},
+			m.Tags(),
+		)
+		assert.True(t, m.Time().After(start))
+		assert.True(t, m.Time().Equal(firstTime))
+	}
+}
+
+func TestParseErrors(t *testing.T) {
+	start := time.Now()
+	metrics, err := Parse([]byte(someInvalid))
+	assert.Error(t, err)
+	assert.Len(t, metrics, 4)
+
+	// all metrics parsed together w/o a timestamp should have the same time.
+	firstTime := metrics[0].Time()
+	for _, m := range metrics {
+		assert.Equal(t,
+			map[string]interface{}{
+				"usage_idle": float64(99),
+				"usage_busy": float64(1),
+			},
+			m.Fields(),
+		)
+		assert.Equal(t,
+			map[string]string{
+				"host":       "foo",
+				"datacenter": "us-east",
+			},
+			m.Tags(),
+		)
+		assert.True(t, m.Time().After(start))
+		assert.True(t, m.Time().Equal(firstTime))
+	}
+}
+
+func TestParseWithTimestamps(t *testing.T) {
+	metrics, err := Parse([]byte(withTimestamps))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 4)
+
+	expectedTimestamps := []time.Time{
+		time.Unix(0, 1480595849000000000),
+		time.Unix(0, 1480595850000000000),
+		time.Unix(0, 1480595851700030000),
+		time.Unix(0, 1480595852000000300),
+	}
+
+	// all metrics parsed together w/o a timestamp should have the same time.
+	for i, m := range metrics {
+		assert.Equal(t,
+			map[string]interface{}{
+				"usage": float64(99),
+			},
+			m.Fields(),
+		)
+		assert.True(t, m.Time().Equal(expectedTimestamps[i]))
+	}
+}
+
+func TestParseEscapes(t *testing.T) {
+	metrics, err := Parse([]byte(withEscapes))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 6)
+
+	tests := []struct {
+		name   string
+		fields map[string]interface{}
+		tags   map[string]string
+	}{
+		{
+			name:   `w, eather`,
+			fields: map[string]interface{}{"temp": float64(99)},
+			tags:   map[string]string{"host": "local"},
+		},
+		{
+			name:   `w,eather`,
+			fields: map[string]interface{}{"temp": float64(99)},
+			tags:   map[string]string{"host": "local"},
+		},
+		{
+			name:   `weather`,
+			fields: map[string]interface{}{"temperature": float64(82)},
+			tags:   map[string]string{"location": `us,midwest`},
+		},
+		{
+			name:   `weather`,
+			fields: map[string]interface{}{`temp=rature`: float64(82)},
+			tags:   map[string]string{"location": `us-midwest`},
+		},
+		{
+			name:   `weather`,
+			fields: map[string]interface{}{"temperature": float64(82)},
+			tags:   map[string]string{`location place`: `us-midwest`},
+		},
+		{
+			name:   `weather`,
+			fields: map[string]interface{}{`temperature`: `too"hot"`},
+			tags:   map[string]string{"location": `us-midwest`},
+		},
+	}
+
+	for i, test := range tests {
+		assert.Equal(t, test.name, metrics[i].Name())
+		assert.Equal(t, test.fields, metrics[i].Fields())
+		assert.Equal(t, test.tags, metrics[i].Tags())
+	}
+}
+
+func TestParseTrueBooleans(t *testing.T) {
+	metrics, err := Parse([]byte(trues))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 5)
+
+	for _, metric := range metrics {
+		assert.Equal(t, "booltest", metric.Name())
+		assert.Equal(t, true, metric.Fields()["b"])
+	}
+}
+
+func TestParseFalseBooleans(t *testing.T) {
+	metrics, err := Parse([]byte(falses))
+	assert.NoError(t, err)
+	assert.Len(t, metrics, 5)
+
+	for _, metric := range metrics {
+		assert.Equal(t, "booltest", metric.Name())
+		assert.Equal(t, false, metric.Fields()["b"])
+	}
+}
+
+func TestParsePointBadNumber(t *testing.T) {
+	for _, tt := range []string{
+		"cpu v=- ",
+		"cpu v=-i ",
+		"cpu v=-. ",
+		"cpu v=. ",
+		"cpu v=1.0i ",
+		"cpu v=1ii ",
+		"cpu v=1a ",
+		"cpu v=-e-e-e ",
+		"cpu v=42+3 ",
+		"cpu v= ",
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParseTagsMissingParts(t *testing.T) {
+	for _, tt := range []string{
+		`cpu,host`,
+		`cpu,host,`,
+		`cpu,host=`,
+		`cpu,f=oo=bar value=1`,
+		`cpu,host value=1i`,
+		`cpu,host=serverA,region value=1i`,
+		`cpu,host=serverA,region= value=1i`,
+		`cpu,host=serverA,region=,zone=us-west value=1i`,
+		`cpu, value=1`,
+		`cpu, ,,`,
+		`cpu,,,`,
+		`cpu,host=serverA,=us-east value=1i`,
+		`cpu,host=serverAa\,,=us-east value=1i`,
+		`cpu,host=serverA\,,=us-east value=1i`,
+		`cpu, =serverA value=1i`,
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParsePointWhitespace(t *testing.T) {
+	for _, tt := range []string{
+		`cpu    value=1.0 1257894000000000000`,
+		`cpu value=1.0     1257894000000000000`,
+		`cpu      value=1.0     1257894000000000000`,
+		`cpu value=1.0 1257894000000000000   `,
+	} {
+		m, err := Parse([]byte(tt + "\n"))
+		assert.NoError(t, err, tt)
+		assert.Equal(t, "cpu", m[0].Name())
+		assert.Equal(t, map[string]interface{}{"value": float64(1)}, m[0].Fields())
+	}
+}
+
+func TestParsePointInvalidFields(t *testing.T) {
+	for _, tt := range []string{
+		"test,foo=bar a=101,=value",
+		"test,foo=bar =value",
+		"test,foo=bar a=101,key=",
+		"test,foo=bar key=",
+		`test,foo=bar a=101,b="foo`,
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParsePointNoFields(t *testing.T) {
+	for _, tt := range []string{
+		"cpu_load_short,host=server01,region=us-west",
+		"very_long_measurement_name",
+		"cpu,host==",
+		"============",
+		"cpu",
+		"cpu\n\n\n\n\n\n\n",
+		"                ",
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+// a b=1 << this is the shortest possible metric
+// any shorter is just ignored
+func TestParseBufTooShort(t *testing.T) {
+	for _, tt := range []string{
+		"",
+		"a",
+		"a ",
+		"a b=",
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParseInvalidBooleans(t *testing.T) {
+	for _, tt := range []string{
+		"test b=tru",
+		"test b=fals",
+		"test b=faLse",
+		"test q=foo",
+		"test b=lambchops",
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParseInvalidNumbers(t *testing.T) {
+	for _, tt := range []string{
+		"test b=-",
+		"test b=1.1.1",
+		"test b=nan",
+		"test b=9i10",
+		"test b=9999999999999999999i",
+	} {
+		_, err := Parse([]byte(tt + "\n"))
+		assert.Error(t, err, tt)
+	}
+}
+
+func TestParseNegativeTimestamps(t *testing.T) {
+	for _, tt := range []string{
+		"test foo=101 -1257894000000000000",
+	} {
+		metrics, err := Parse([]byte(tt + "\n"))
+		assert.NoError(t, err, tt)
+		assert.True(t, metrics[0].Time().Equal(time.Unix(0, -1257894000000000000)))
+	}
+}
+
+func TestParseMaxKeyLength(t *testing.T) {
+	key := ""
+	for {
+		if len(key) > MaxKeyLength {
+			break
+		}
+		key += "test"
+	}
+
+	_, err := Parse([]byte(key + " value=1\n"))
+	assert.Error(t, err)
+}

output.go

@@ -1,8 +1,4 @@
-package outputs
-
-import (
-	"github.com/influxdb/influxdb/client/v2"
-)
+package telegraf
 
 type Output interface {
 	// Connect to the Output
@@ -14,7 +10,7 @@ type Output interface {
 	// SampleConfig returns the default configuration of the Output
 	SampleConfig() string
 	// Write takes in group of points to be written to the Output
-	Write(points []*client.Point) error
+	Write(metrics []Metric) error
 }
 
 type ServiceOutput interface {
@@ -27,17 +23,9 @@ type ServiceOutput interface {
 	// SampleConfig returns the default configuration of the Output
 	SampleConfig() string
 	// Write takes in group of points to be written to the Output
-	Write(points []*client.Point) error
+	Write(metrics []Metric) error
 	// Start the "service" that will provide an Output
 	Start() error
 	// Stop the "service" that will provide an Output
 	Stop()
 }
-
-type Creator func() Output
-
-var Outputs = map[string]Creator{}
-
-func Add(name string, creator Creator) {
-	Outputs[name] = creator
-}

outputs/all/all.go

@@ -1,16 +0,0 @@
-package all
-
-import (
-	_ "github.com/influxdb/telegraf/outputs/amon"
-	_ "github.com/influxdb/telegraf/outputs/amqp"
-	_ "github.com/influxdb/telegraf/outputs/datadog"
-	_ "github.com/influxdb/telegraf/outputs/influxdb"
-	_ "github.com/influxdb/telegraf/outputs/kafka"
-	_ "github.com/influxdb/telegraf/outputs/kinesis"
-	_ "github.com/influxdb/telegraf/outputs/librato"
-	_ "github.com/influxdb/telegraf/outputs/mqtt"
-	_ "github.com/influxdb/telegraf/outputs/nsq"
-	_ "github.com/influxdb/telegraf/outputs/opentsdb"
-	_ "github.com/influxdb/telegraf/outputs/prometheus_client"
-	_ "github.com/influxdb/telegraf/outputs/riemann"
-)

outputs/amqp/amqp.go

@@ -1,161 +0,0 @@
-package amqp
-
-import (
-	"bytes"
-	"fmt"
-	"log"
-	"sync"
-	"time"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-	"github.com/streadway/amqp"
-)
-
-type AMQP struct {
-	// AMQP brokers to send metrics to
-	URL string
-	// AMQP exchange
-	Exchange string
-	// Routing Key Tag
-	RoutingTag string `toml:"routing_tag"`
-	// InfluxDB database
-	Database string
-	// InfluxDB retention policy
-	RetentionPolicy string
-	// InfluxDB precision
-	Precision string
-
-	channel *amqp.Channel
-	sync.Mutex
-	headers amqp.Table
-}
-
-const (
-	DefaultRetentionPolicy = "default"
-	DefaultDatabase        = "telegraf"
-	DefaultPrecision       = "s"
-)
-
-var sampleConfig = `
-  # AMQP url
-  url = "amqp://localhost:5672/influxdb"
-  # AMQP exchange
-  exchange = "telegraf"
-  # Telegraf tag to use as a routing key
-  #  ie, if this tag exists, it's value will be used as the routing key
-  routing_tag = "host"
-
-  # InfluxDB retention policy
-  #retention_policy = "default"
-  # InfluxDB database
-  #database = "telegraf"
-  # InfluxDB precision
-  #precision = "s"
-`
-
-func (q *AMQP) Connect() error {
-	q.Lock()
-	defer q.Unlock()
-
-	q.headers = amqp.Table{
-		"precision":        q.Precision,
-		"database":         q.Database,
-		"retention_policy": q.RetentionPolicy,
-	}
-
-	connection, err := amqp.Dial(q.URL)
-	if err != nil {
-		return err
-	}
-	channel, err := connection.Channel()
-	if err != nil {
-		return fmt.Errorf("Failed to open a channel: %s", err)
-	}
-
-	err = channel.ExchangeDeclare(
-		q.Exchange, // name
-		"topic",    // type
-		true,       // durable
-		false,      // delete when unused
-		false,      // internal
-		false,      // no-wait
-		nil,        // arguments
-	)
-	if err != nil {
-		return fmt.Errorf("Failed to declare an exchange: %s", err)
-	}
-	q.channel = channel
-	go func() {
-		log.Printf("Closing: %s", <-connection.NotifyClose(make(chan *amqp.Error)))
-		log.Printf("Trying to reconnect")
-		for err := q.Connect(); err != nil; err = q.Connect() {
-			log.Println(err)
-			time.Sleep(10 * time.Second)
-		}
-
-	}()
-	return nil
-}
-
-func (q *AMQP) Close() error {
-	return q.channel.Close()
-}
-
-func (q *AMQP) SampleConfig() string {
-	return sampleConfig
-}
-
-func (q *AMQP) Description() string {
-	return "Configuration for the AMQP server to send metrics to"
-}
-
-func (q *AMQP) Write(points []*client.Point) error {
-	q.Lock()
-	defer q.Unlock()
-	if len(points) == 0 {
-		return nil
-	}
-	var outbuf = make(map[string][][]byte)
-
-	for _, p := range points {
-		// Combine tags from Point and BatchPoints and grab the resulting
-		// line-protocol output string to write to AMQP
-		var value, key string
-		value = p.String()
-
-		if q.RoutingTag != "" {
-			if h, ok := p.Tags()[q.RoutingTag]; ok {
-				key = h
-			}
-		}
-		outbuf[key] = append(outbuf[key], []byte(value))
-
-	}
-	for key, buf := range outbuf {
-		err := q.channel.Publish(
-			q.Exchange, // exchange
-			key,        // routing key
-			false,      // mandatory
-			false,      // immediate
-			amqp.Publishing{
-				Headers:     q.headers,
-				ContentType: "text/plain",
-				Body:        bytes.Join(buf, []byte("\n")),
-			})
-		if err != nil {
-			return fmt.Errorf("FAILED to send amqp message: %s", err)
-		}
-	}
-	return nil
-}
-
-func init() {
-	outputs.Add("amqp", func() outputs.Output {
-		return &AMQP{
-			Database:        DefaultDatabase,
-			Precision:       DefaultPrecision,
-			RetentionPolicy: DefaultRetentionPolicy,
-		}
-	})
-}

outputs/influxdb/README.md

@@ -1,12 +0,0 @@
-# InfluxDB Output Plugin
-
-This plugin writes to [InfluxDB](https://www.influxdb.com) via HTTP or UDP.
-
-Required parameters:
-
-* `urls`: List of strings, this is for InfluxDB clustering
-support. On each flush interval, Telegraf will randomly choose one of the urls
-to write to. Each URL should start with either `http://` or `udp://`
-* `database`: The name of the database to write to.
-
-

outputs/influxdb/influxdb.go

@@ -1,162 +0,0 @@
-package influxdb
-
-import (
-	"errors"
-	"fmt"
-	"log"
-	"math/rand"
-	"net/url"
-	"strings"
-	"time"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/internal"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type InfluxDB struct {
-	// URL is only for backwards compatability
-	URL        string
-	URLs       []string `toml:"urls"`
-	Username   string
-	Password   string
-	Database   string
-	UserAgent  string
-	Precision  string
-	Timeout    internal.Duration
-	UDPPayload int `toml:"udp_payload"`
-
-	conns []client.Client
-}
-
-var sampleConfig = `
-  # The full HTTP or UDP endpoint URL for your InfluxDB instance.
-  # Multiple urls can be specified but it is assumed that they are part of the same
-  # cluster, this means that only ONE of the urls will be written to each interval.
-  # urls = ["udp://localhost:8089"] # UDP endpoint example
-  urls = ["http://localhost:8086"] # required
-  # The target database for metrics (telegraf will create it if not exists)
-  database = "telegraf" # required
-  # Precision of writes, valid values are n, u, ms, s, m, and h
-  # note: using second precision greatly helps InfluxDB compression
-  precision = "s"
-
-  # Connection timeout (for the connection with InfluxDB), formatted as a string.
-  # If not provided, will default to 0 (no timeout)
-  # timeout = "5s"
-  # username = "telegraf"
-  # password = "metricsmetricsmetricsmetrics"
-  # Set the user agent for HTTP POSTs (can be useful for log differentiation)
-  # user_agent = "telegraf"
-  # Set UDP payload size, defaults to InfluxDB UDP Client default (512 bytes)
-  # udp_payload = 512
-`
-
-func (i *InfluxDB) Connect() error {
-	var urls []string
-	for _, u := range i.URLs {
-		urls = append(urls, u)
-	}
-
-	// Backward-compatability with single Influx URL config files
-	// This could eventually be removed in favor of specifying the urls as a list
-	if i.URL != "" {
-		urls = append(urls, i.URL)
-	}
-
-	var conns []client.Client
-	for _, u := range urls {
-		switch {
-		case strings.HasPrefix(u, "udp"):
-			parsed_url, err := url.Parse(u)
-			if err != nil {
-				return err
-			}
-
-			if i.UDPPayload == 0 {
-				i.UDPPayload = client.UDPPayloadSize
-			}
-			c, err := client.NewUDPClient(client.UDPConfig{
-				Addr:        parsed_url.Host,
-				PayloadSize: i.UDPPayload,
-			})
-			if err != nil {
-				return err
-			}
-			conns = append(conns, c)
-		default:
-			// If URL doesn't start with "udp", assume HTTP client
-			c, err := client.NewHTTPClient(client.HTTPConfig{
-				Addr:      u,
-				Username:  i.Username,
-				Password:  i.Password,
-				UserAgent: i.UserAgent,
-				Timeout:   i.Timeout.Duration,
-			})
-			if err != nil {
-				return err
-			}
-
-			// Create Database if it doesn't exist
-			_, e := c.Query(client.Query{
-				Command: fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", i.Database),
-			})
-
-			if e != nil {
-				log.Println("Database creation failed: " + e.Error())
-			}
-
-			conns = append(conns, c)
-		}
-	}
-
-	i.conns = conns
-	rand.Seed(time.Now().UnixNano())
-	return nil
-}
-
-func (i *InfluxDB) Close() error {
-	// InfluxDB client does not provide a Close() function
-	return nil
-}
-
-func (i *InfluxDB) SampleConfig() string {
-	return sampleConfig
-}
-
-func (i *InfluxDB) Description() string {
-	return "Configuration for influxdb server to send metrics to"
-}
-
-// Choose a random server in the cluster to write to until a successful write
-// occurs, logging each unsuccessful. If all servers fail, return error.
-func (i *InfluxDB) Write(points []*client.Point) error {
-	bp, _ := client.NewBatchPoints(client.BatchPointsConfig{
-		Database:  i.Database,
-		Precision: i.Precision,
-	})
-
-	for _, point := range points {
-		bp.AddPoint(point)
-	}
-
-	// This will get set to nil if a successful write occurs
-	err := errors.New("Could not write to any InfluxDB server in cluster")
-
-	p := rand.Perm(len(i.conns))
-	for _, n := range p {
-		if e := i.conns[n].Write(bp); e != nil {
-			log.Println("ERROR: " + e.Error())
-		} else {
-			err = nil
-			break
-		}
-	}
-	return err
-}
-
-func init() {
-	outputs.Add("influxdb", func() outputs.Output {
-		return &InfluxDB{}
-	})
-}

outputs/kafka/kafka.go

@@ -1,85 +0,0 @@
-package kafka
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/Shopify/sarama"
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type Kafka struct {
-	// Kafka brokers to send metrics to
-	Brokers []string
-	// Kafka topic
-	Topic string
-	// Routing Key Tag
-	RoutingTag string `toml:"routing_tag"`
-
-	producer sarama.SyncProducer
-}
-
-var sampleConfig = `
-  # URLs of kafka brokers
-  brokers = ["localhost:9092"]
-  # Kafka topic for producer messages
-  topic = "telegraf"
-  # Telegraf tag to use as a routing key
-  #  ie, if this tag exists, it's value will be used as the routing key
-  routing_tag = "host"
-`
-
-func (k *Kafka) Connect() error {
-	producer, err := sarama.NewSyncProducer(k.Brokers, nil)
-	if err != nil {
-		return err
-	}
-	k.producer = producer
-	return nil
-}
-
-func (k *Kafka) Close() error {
-	return k.producer.Close()
-}
-
-func (k *Kafka) SampleConfig() string {
-	return sampleConfig
-}
-
-func (k *Kafka) Description() string {
-	return "Configuration for the Kafka server to send metrics to"
-}
-
-func (k *Kafka) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-
-	for _, p := range points {
-		// Combine tags from Point and BatchPoints and grab the resulting
-		// line-protocol output string to write to Kafka
-		value := p.String()
-
-		m := &sarama.ProducerMessage{
-			Topic: k.Topic,
-			Value: sarama.StringEncoder(value),
-		}
-		if h, ok := p.Tags()[k.RoutingTag]; ok {
-			m.Key = sarama.StringEncoder(h)
-		}
-
-		_, _, err := k.producer.SendMessage(m)
-		if err != nil {
-			return errors.New(fmt.Sprintf("FAILED to send kafka message: %s\n",
-				err))
-		}
-	}
-	return nil
-}
-
-func init() {
-	outputs.Add("kafka", func() outputs.Output {
-		return &Kafka{}
-	})
-}

outputs/kinesis/kinesis.go

@@ -1,179 +0,0 @@
-package kinesis
-
-import (
-	"errors"
-	"fmt"
-	"log"
-	"os"
-	"sync/atomic"
-	"time"
-
-	"github.com/aws/aws-sdk-go/aws"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
-	"github.com/aws/aws-sdk-go/aws/ec2metadata"
-	"github.com/aws/aws-sdk-go/aws/session"
-	"github.com/aws/aws-sdk-go/service/kinesis"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type KinesisOutput struct {
-	Region       string `toml:"region"`
-	StreamName   string `toml:"streamname"`
-	PartitionKey string `toml:"partitionkey"`
-	Format       string `toml:"format"`
-	Debug        bool   `toml:"debug"`
-	svc          *kinesis.Kinesis
-}
-
-var sampleConfig = `
-  # Amazon REGION of kinesis endpoint.
-  region = "ap-southeast-2"
-  # Kinesis StreamName must exist prior to starting telegraf.
-  streamname = "StreamName"
-  # PartitionKey as used for sharding data.
-  partitionkey = "PartitionKey"
-  # format of the Data payload in the kinesis PutRecord, supported
-  # String and Custom.
-  format = "string"
-  # debug will show upstream aws messages.
-  debug = false
-`
-
-func (k *KinesisOutput) SampleConfig() string {
-	return sampleConfig
-}
-
-func (k *KinesisOutput) Description() string {
-	return "Configuration for the AWS Kinesis output."
-}
-
-func checkstream(l []*string, s string) bool {
-	// Check if the StreamName exists in the slice returned from the ListStreams API request.
-	for _, stream := range l {
-		if *stream == s {
-			return true
-		}
-	}
-	return false
-}
-
-func (k *KinesisOutput) Connect() error {
-	// We attempt first to create a session to Kinesis using an IAMS role, if that fails it will fall through to using
-	// environment variables, and then Shared Credentials.
-	if k.Debug {
-		log.Printf("kinesis: Establishing a connection to Kinesis in %+v", k.Region)
-	}
-	Config := &aws.Config{
-		Region: aws.String(k.Region),
-		Credentials: credentials.NewChainCredentials(
-			[]credentials.Provider{
-				&ec2rolecreds.EC2RoleProvider{Client: ec2metadata.New(session.New())},
-				&credentials.EnvProvider{},
-				&credentials.SharedCredentialsProvider{},
-			}),
-	}
-	svc := kinesis.New(session.New(Config))
-
-	KinesisParams := &kinesis.ListStreamsInput{
-		Limit: aws.Int64(100),
-	}
-
-	resp, err := svc.ListStreams(KinesisParams)
-
-	if err != nil {
-		log.Printf("kinesis: Error in ListSteams API call : %+v \n", err)
-	}
-
-	if checkstream(resp.StreamNames, k.StreamName) {
-		if k.Debug {
-			log.Printf("kinesis: Stream Exists")
-		}
-		k.svc = svc
-		return nil
-	} else {
-		log.Printf("kinesis : You have configured a StreamName %+v which does not exist. exiting.", k.StreamName)
-		os.Exit(1)
-	}
-	return err
-}
-
-func (k *KinesisOutput) Close() error {
-	return errors.New("Error")
-}
-
-func FormatMetric(k *KinesisOutput, point *client.Point) (string, error) {
-	if k.Format == "string" {
-		return point.String(), nil
-	} else {
-		m := fmt.Sprintf("%+v,%+v,%+v",
-			point.Name(),
-			point.Tags(),
-			point.String())
-		return m, nil
-	}
-}
-
-func writekinesis(k *KinesisOutput, r []*kinesis.PutRecordsRequestEntry) time.Duration {
-	start := time.Now()
-	payload := &kinesis.PutRecordsInput{
-		Records:    r,
-		StreamName: aws.String(k.StreamName),
-	}
-
-	if k.Debug {
-		resp, err := k.svc.PutRecords(payload)
-		if err != nil {
-			log.Printf("kinesis: Unable to write to Kinesis : %+v \n", err.Error())
-		}
-		log.Printf("%+v \n", resp)
-
-	} else {
-		_, err := k.svc.PutRecords(payload)
-		if err != nil {
-			log.Printf("kinesis: Unable to write to Kinesis : %+v \n", err.Error())
-		}
-	}
-	return time.Since(start)
-}
-
-func (k *KinesisOutput) Write(points []*client.Point) error {
-	var sz uint32 = 0
-
-	if len(points) == 0 {
-		return nil
-	}
-
-	r := []*kinesis.PutRecordsRequestEntry{}
-
-	for _, p := range points {
-		atomic.AddUint32(&sz, 1)
-
-		metric, _ := FormatMetric(k, p)
-		d := kinesis.PutRecordsRequestEntry{
-			Data:         []byte(metric),
-			PartitionKey: aws.String(k.PartitionKey),
-		}
-		r = append(r, &d)
-
-		if sz == 500 {
-			// Max Messages Per PutRecordRequest is 500
-			elapsed := writekinesis(k, r)
-			log.Printf("Wrote a %+v point batch to Kinesis in %+v.\n", sz, elapsed)
-			atomic.StoreUint32(&sz, 0)
-			r = nil
-		}
-	}
-
-	writekinesis(k, r)
-
-	return nil
-}
-
-func init() {
-	outputs.Add("kinesis", func() outputs.Output {
-		return &KinesisOutput{}
-	})
-}

outputs/kinesis/kinesis_test.go

@@ -1,39 +0,0 @@
-package kinesis
-
-import (
-	"github.com/influxdb/telegraf/testutil"
-	"github.com/stretchr/testify/require"
-	"testing"
-)
-
-func TestFormatMetric(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping integration test in short mode")
-	}
-
-	k := &KinesisOutput{
-		Format: "string",
-	}
-
-	p := testutil.MockBatchPoints().Points()[0]
-
-	valid_string := "test1,tag1=value1 value=1 1257894000000000000"
-	func_string, err := FormatMetric(k, p)
-
-	if func_string != valid_string {
-		t.Error("Expected ", valid_string)
-	}
-	require.NoError(t, err)
-
-	k = &KinesisOutput{
-		Format: "custom",
-	}
-
-	valid_custom := "test1,map[tag1:value1],test1,tag1=value1 value=1 1257894000000000000"
-	func_custom, err := FormatMetric(k, p)
-
-	if func_custom != valid_custom {
-		t.Error("Expected ", valid_custom)
-	}
-	require.NoError(t, err)
-}

outputs/librato/librato.go

@@ -1,175 +0,0 @@
-package librato
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"log"
-	"net/http"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/internal"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type Librato struct {
-	ApiUser   string
-	ApiToken  string
-	SourceTag string
-	Timeout   internal.Duration
-
-	apiUrl string
-	client *http.Client
-}
-
-var sampleConfig = `
-  # Librator API Docs
-  # http://dev.librato.com/v1/metrics-authentication
-
-  # Librato API user
-  api_user = "telegraf@influxdb.com" # required.
-
-  # Librato API token
-  api_token = "my-secret-token" # required.
-
-  # Tag Field to populate source attribute (optional)
-  # This is typically the _hostname_ from which the metric was obtained.
-  source_tag = "hostname"
-
-  # Connection timeout.
-  # timeout = "5s"
-`
-
-type Metrics struct {
-	Gauges []*Gauge `json:"gauges"`
-}
-
-type Gauge struct {
-	Name        string  `json:"name"`
-	Value       float64 `json:"value"`
-	Source      string  `json:"source"`
-	MeasureTime int64   `json:"measure_time"`
-}
-
-const librato_api = "https://metrics-api.librato.com/v1/metrics"
-
-func NewLibrato(apiUrl string) *Librato {
-	return &Librato{
-		apiUrl: apiUrl,
-	}
-}
-
-func (l *Librato) Connect() error {
-	if l.ApiUser == "" || l.ApiToken == "" {
-		return fmt.Errorf("api_user and api_token are required fields for librato output")
-	}
-	l.client = &http.Client{
-		Timeout: l.Timeout.Duration,
-	}
-	return nil
-}
-
-func (l *Librato) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-	metrics := Metrics{}
-	tempGauges := []*Gauge{}
-	metricCounter := 0
-
-	for _, pt := range points {
-		if gauges, err := l.buildGauges(pt); err == nil {
-			for _, gauge := range gauges {
-				tempGauges = append(tempGauges, gauge)
-				metricCounter++
-			}
-		} else {
-			log.Printf("unable to build Gauge for %s, skipping\n", pt.Name())
-		}
-	}
-
-	metrics.Gauges = make([]*Gauge, metricCounter)
-	copy(metrics.Gauges, tempGauges[0:])
-	metricsBytes, err := json.Marshal(metrics)
-	if err != nil {
-		return fmt.Errorf("unable to marshal Metrics, %s\n", err.Error())
-	}
-	req, err := http.NewRequest("POST", l.apiUrl, bytes.NewBuffer(metricsBytes))
-	if err != nil {
-		return fmt.Errorf("unable to create http.Request, %s\n", err.Error())
-	}
-	req.Header.Add("Content-Type", "application/json")
-	req.SetBasicAuth(l.ApiUser, l.ApiToken)
-
-	resp, err := l.client.Do(req)
-	if err != nil {
-		return fmt.Errorf("error POSTing metrics, %s\n", err.Error())
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != 200 {
-		return fmt.Errorf("received bad status code, %d\n", resp.StatusCode)
-	}
-
-	return nil
-}
-
-func (l *Librato) SampleConfig() string {
-	return sampleConfig
-}
-
-func (l *Librato) Description() string {
-	return "Configuration for Librato API to send metrics to."
-}
-
-func (l *Librato) buildGauges(pt *client.Point) ([]*Gauge, error) {
-	gauges := []*Gauge{}
-	for fieldName, value := range pt.Fields() {
-		gauge := &Gauge{
-			Name:        pt.Name() + "_" + fieldName,
-			MeasureTime: pt.Time().Unix(),
-		}
-		if err := gauge.setValue(value); err != nil {
-			return gauges, fmt.Errorf("unable to extract value from Fields, %s\n",
-				err.Error())
-		}
-		if l.SourceTag != "" {
-			if source, ok := pt.Tags()[l.SourceTag]; ok {
-				gauge.Source = source
-			} else {
-				return gauges,
-					fmt.Errorf("undeterminable Source type from Field, %s\n",
-						l.SourceTag)
-			}
-		}
-	}
-	return gauges, nil
-}
-
-func (g *Gauge) setValue(v interface{}) error {
-	switch d := v.(type) {
-	case int:
-		g.Value = float64(int(d))
-	case int32:
-		g.Value = float64(int32(d))
-	case int64:
-		g.Value = float64(int64(d))
-	case float32:
-		g.Value = float64(d)
-	case float64:
-		g.Value = float64(d)
-	default:
-		return fmt.Errorf("undeterminable type %+v", d)
-	}
-	return nil
-}
-
-func (l *Librato) Close() error {
-	return nil
-}
-
-func init() {
-	outputs.Add("librato", func() outputs.Output {
-		return NewLibrato(librato_api)
-	})
-}

outputs/librato/librato_test.go

@@ -1,212 +0,0 @@
-package librato
-
-import (
-	"encoding/json"
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"reflect"
-	"testing"
-	"time"
-
-	"github.com/influxdb/telegraf/testutil"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/stretchr/testify/require"
-)
-
-var (
-	fakeUrl   = "http://test.librato.com"
-	fakeUser  = "telegraf@influxdb.com"
-	fakeToken = "123456"
-)
-
-func fakeLibrato() *Librato {
-	l := NewLibrato(fakeUrl)
-	l.ApiUser = fakeUser
-	l.ApiToken = fakeToken
-	return l
-}
-
-func TestUriOverride(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
-	}))
-	defer ts.Close()
-
-	l := NewLibrato(ts.URL)
-	l.ApiUser = "telegraf@influxdb.com"
-	l.ApiToken = "123456"
-	err := l.Connect()
-	require.NoError(t, err)
-	err = l.Write(testutil.MockBatchPoints().Points())
-	require.NoError(t, err)
-}
-
-func TestBadStatusCode(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusServiceUnavailable)
-		json.NewEncoder(w).Encode(`{
-      "errors": {
-        "system": [
-          "The API is currently down for maintenance. It'll be back shortly."
-        ]
-      }
-    }`)
-	}))
-	defer ts.Close()
-
-	l := NewLibrato(ts.URL)
-	l.ApiUser = "telegraf@influxdb.com"
-	l.ApiToken = "123456"
-	err := l.Connect()
-	require.NoError(t, err)
-	err = l.Write(testutil.MockBatchPoints().Points())
-	if err == nil {
-		t.Errorf("error expected but none returned")
-	} else {
-		require.EqualError(t, fmt.Errorf("received bad status code, 503\n"), err.Error())
-	}
-}
-
-func TestBuildGauge(t *testing.T) {
-	var gaugeTests = []struct {
-		ptIn     *client.Point
-		outGauge *Gauge
-		err      error
-	}{
-		{
-			testutil.TestPoint(0.0, "test1"),
-			&Gauge{
-				Name:        "test1",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       0.0,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint(1.0, "test2"),
-			&Gauge{
-				Name:        "test2",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       1.0,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint(10, "test3"),
-			&Gauge{
-				Name:        "test3",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       10.0,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint(int32(112345), "test4"),
-			&Gauge{
-				Name:        "test4",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       112345.0,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint(int64(112345), "test5"),
-			&Gauge{
-				Name:        "test5",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       112345.0,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint(float32(11234.5), "test6"),
-			&Gauge{
-				Name:        "test6",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       11234.5,
-			},
-			nil,
-		},
-		{
-			testutil.TestPoint("11234.5", "test7"),
-			&Gauge{
-				Name:        "test7",
-				MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       11234.5,
-			},
-			fmt.Errorf("unable to extract value from Fields, undeterminable type"),
-		},
-	}
-
-	l := NewLibrato(fakeUrl)
-	for _, gt := range gaugeTests {
-		gauge, err := l.buildGauge(gt.ptIn)
-		if err != nil && gt.err == nil {
-			t.Errorf("%s: unexpected error, %+v\n", gt.ptIn.Name(), err)
-		}
-		if gt.err != nil && err == nil {
-			t.Errorf("%s: expected an error (%s) but none returned", gt.ptIn.Name(), gt.err.Error())
-		}
-		if !reflect.DeepEqual(gauge, gt.outGauge) && gt.err == nil {
-			t.Errorf("%s: \nexpected %+v\ngot %+v\n", gt.ptIn.Name(), gt.outGauge, gauge)
-		}
-	}
-}
-
-func TestBuildGaugeWithSource(t *testing.T) {
-	pt1, _ := client.NewPoint(
-		"test1",
-		map[string]string{"hostname": "192.168.0.1"},
-		map[string]interface{}{"value": 0.0},
-		time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
-	)
-	pt2, _ := client.NewPoint(
-		"test2",
-		map[string]string{"hostnam": "192.168.0.1"},
-		map[string]interface{}{"value": 1.0},
-		time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC),
-	)
-	var gaugeTests = []struct {
-		ptIn     *client.Point
-		outGauge *Gauge
-		err      error
-	}{
-
-		{
-			pt1,
-			&Gauge{
-				Name:        "test1",
-				MeasureTime: time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       0.0,
-				Source:      "192.168.0.1",
-			},
-			nil,
-		},
-		{
-			pt2,
-			&Gauge{
-				Name:        "test2",
-				MeasureTime: time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC).Unix(),
-				Value:       1.0,
-			},
-			fmt.Errorf("undeterminable Source type from Field, hostname"),
-		},
-	}
-
-	l := NewLibrato(fakeUrl)
-	l.SourceTag = "hostname"
-	for _, gt := range gaugeTests {
-		gauge, err := l.buildGauge(gt.ptIn)
-		if err != nil && gt.err == nil {
-			t.Errorf("%s: unexpected error, %+v\n", gt.ptIn.Name(), err)
-		}
-		if gt.err != nil && err == nil {
-			t.Errorf("%s: expected an error (%s) but none returned", gt.ptIn.Name(), gt.err.Error())
-		}
-		if !reflect.DeepEqual(gauge, gt.outGauge) && gt.err == nil {
-			t.Errorf("%s: \nexpected %+v\ngot %+v\n", gt.ptIn.Name(), gt.outGauge, gauge)
-		}
-	}
-}

outputs/mqtt/mqtt.go

@@ -1,190 +0,0 @@
-package mqtt
-
-import (
-	"crypto/rand"
-	"crypto/tls"
-	"crypto/x509"
-	"fmt"
-	"io/ioutil"
-	"strings"
-	"sync"
-
-	paho "git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git"
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/internal"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-const MaxClientIdLen = 8
-const MaxRetryCount = 3
-const ClientIdPrefix = "telegraf"
-
-type MQTT struct {
-	Servers     []string `toml:"servers"`
-	Username    string
-	Password    string
-	Database    string
-	Timeout     internal.Duration
-	TopicPrefix string
-
-	Client *paho.Client
-	Opts   *paho.ClientOptions
-	sync.Mutex
-}
-
-var sampleConfig = `
-  servers = ["localhost:1883"] # required.
-
-  # MQTT outputs send metrics to this topic format
-  #    "<topic_prefix>/host/<hostname>/<pluginname>/"
-  #   ex: prefix/host/web01.example.com/mem/available
-  # topic_prefix = "prefix"
-
-  # username and password to connect MQTT server.
-  # username = "telegraf"
-  # password = "metricsmetricsmetricsmetrics"
-`
-
-func (m *MQTT) Connect() error {
-	var err error
-	m.Lock()
-	defer m.Unlock()
-
-	m.Opts, err = m.CreateOpts()
-	if err != nil {
-		return err
-	}
-
-	m.Client = paho.NewClient(m.Opts)
-	if token := m.Client.Connect(); token.Wait() && token.Error() != nil {
-		return token.Error()
-	}
-
-	return nil
-}
-
-func (m *MQTT) Close() error {
-	if m.Client.IsConnected() {
-		m.Client.Disconnect(20)
-	}
-	return nil
-}
-
-func (m *MQTT) SampleConfig() string {
-	return sampleConfig
-}
-
-func (m *MQTT) Description() string {
-	return "Configuration for MQTT server to send metrics to"
-}
-
-func (m *MQTT) Write(points []*client.Point) error {
-	m.Lock()
-	defer m.Unlock()
-	if len(points) == 0 {
-		return nil
-	}
-	hostname, ok := points[0].Tags()["host"]
-	if !ok {
-		hostname = ""
-	}
-
-	for _, p := range points {
-		var t []string
-		if m.TopicPrefix != "" {
-			t = append(t, m.TopicPrefix)
-		}
-		tm := strings.Split(p.Name(), "_")
-		if len(tm) < 2 {
-			tm = []string{p.Name(), "stat"}
-		}
-
-		t = append(t, "host", hostname, tm[0], tm[1])
-		topic := strings.Join(t, "/")
-
-		value := p.String()
-		err := m.publish(topic, value)
-		if err != nil {
-			return fmt.Errorf("Could not write to MQTT server, %s", err)
-		}
-	}
-
-	return nil
-}
-
-func (m *MQTT) publish(topic, body string) error {
-	token := m.Client.Publish(topic, 0, false, body)
-	token.Wait()
-	if token.Error() != nil {
-		return token.Error()
-	}
-	return nil
-}
-
-func (m *MQTT) CreateOpts() (*paho.ClientOptions, error) {
-	opts := paho.NewClientOptions()
-
-	clientId := getRandomClientId()
-	opts.SetClientID(clientId)
-
-	TLSConfig := &tls.Config{InsecureSkipVerify: false}
-	ca := "" // TODO
-	scheme := "tcp"
-	if ca != "" {
-		scheme = "ssl"
-		certPool, err := getCertPool(ca)
-		if err != nil {
-			return nil, err
-		}
-		TLSConfig.RootCAs = certPool
-	}
-	TLSConfig.InsecureSkipVerify = true // TODO
-	opts.SetTLSConfig(TLSConfig)
-
-	user := m.Username
-	if user == "" {
-		opts.SetUsername(user)
-	}
-	password := m.Password
-	if password != "" {
-		opts.SetPassword(password)
-	}
-
-	if len(m.Servers) == 0 {
-		return opts, fmt.Errorf("could not get host infomations")
-	}
-	for _, host := range m.Servers {
-		server := fmt.Sprintf("%s://%s", scheme, host)
-
-		opts.AddBroker(server)
-	}
-	opts.SetAutoReconnect(true)
-	return opts, nil
-}
-
-func getRandomClientId() string {
-	const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
-	var bytes = make([]byte, MaxClientIdLen)
-	rand.Read(bytes)
-	for i, b := range bytes {
-		bytes[i] = alphanum[b%byte(len(alphanum))]
-	}
-	return ClientIdPrefix + "-" + string(bytes)
-}
-
-func getCertPool(pemPath string) (*x509.CertPool, error) {
-	certs := x509.NewCertPool()
-
-	pemData, err := ioutil.ReadFile(pemPath)
-	if err != nil {
-		return nil, err
-	}
-	certs.AppendCertsFromPEM(pemData)
-	return certs, nil
-}
-
-func init() {
-	outputs.Add("mqtt", func() outputs.Output {
-		return &MQTT{}
-	})
-}

outputs/nsq/nsq.go

@@ -1,71 +0,0 @@
-package nsq
-
-import (
-	"fmt"
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-	"github.com/nsqio/go-nsq"
-)
-
-type NSQ struct {
-	Server   string
-	Topic    string
-	producer *nsq.Producer
-}
-
-var sampleConfig = `
-  # Location of nsqd instance listening on TCP
-  server = "localhost:4150"
-  # NSQ topic for producer messages
-  topic = "telegraf"
-`
-
-func (n *NSQ) Connect() error {
-	config := nsq.NewConfig()
-	producer, err := nsq.NewProducer(n.Server, config)
-
-	if err != nil {
-		return err
-	}
-
-	n.producer = producer
-	return nil
-}
-
-func (n *NSQ) Close() error {
-	n.producer.Stop()
-	return nil
-}
-
-func (n *NSQ) SampleConfig() string {
-	return sampleConfig
-}
-
-func (n *NSQ) Description() string {
-	return "Send telegraf measurements to NSQD"
-}
-
-func (n *NSQ) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-
-	for _, p := range points {
-		// Combine tags from Point and BatchPoints and grab the resulting
-		// line-protocol output string to write to NSQ
-		value := p.String()
-
-		err := n.producer.Publish(n.Topic, []byte(value))
-
-		if err != nil {
-			return fmt.Errorf("FAILED to send NSQD message: %s", err)
-		}
-	}
-	return nil
-}
-
-func init() {
-	outputs.Add("nsq", func() outputs.Output {
-		return &NSQ{}
-	})
-}

outputs/opentsdb/opentsdb.go

@@ -1,168 +0,0 @@
-package opentsdb
-
-import (
-	"fmt"
-	"net"
-	"sort"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type OpenTSDB struct {
-	Prefix string
-
-	Host string
-	Port int
-
-	Debug bool
-}
-
-var sampleConfig = `
-  # prefix for metrics keys
-  prefix = "my.specific.prefix."
-
-  ## Telnet Mode ##
-  # DNS name of the OpenTSDB server in telnet mode
-  host = "opentsdb.example.com"
-
-  # Port of the OpenTSDB server in telnet mode
-  port = 4242
-
-  # Debug true - Prints OpenTSDB communication
-  debug = false
-`
-
-type MetricLine struct {
-	Metric    string
-	Timestamp int64
-	Value     string
-	Tags      string
-}
-
-func (o *OpenTSDB) Connect() error {
-	// Test Connection to OpenTSDB Server
-	uri := fmt.Sprintf("%s:%d", o.Host, o.Port)
-	tcpAddr, err := net.ResolveTCPAddr("tcp", uri)
-	if err != nil {
-		return fmt.Errorf("OpenTSDB: TCP address cannot be resolved")
-	}
-	connection, err := net.DialTCP("tcp", nil, tcpAddr)
-	if err != nil {
-		return fmt.Errorf("OpenTSDB: Telnet connect fail")
-	}
-	defer connection.Close()
-	return nil
-}
-
-func (o *OpenTSDB) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-	now := time.Now()
-
-	// Send Data with telnet / socket communication
-	uri := fmt.Sprintf("%s:%d", o.Host, o.Port)
-	tcpAddr, _ := net.ResolveTCPAddr("tcp", uri)
-	connection, err := net.DialTCP("tcp", nil, tcpAddr)
-	if err != nil {
-		return fmt.Errorf("OpenTSDB: Telnet connect fail")
-	}
-	defer connection.Close()
-
-	for _, pt := range points {
-		for _, metric := range buildMetrics(pt, now, o.Prefix) {
-			messageLine := fmt.Sprintf("put %s %v %s %s\n",
-				metric.Metric, metric.Timestamp, metric.Value, metric.Tags)
-			if o.Debug {
-				fmt.Print(messageLine)
-			}
-			_, err := connection.Write([]byte(messageLine))
-			if err != nil {
-				return fmt.Errorf("OpenTSDB: Telnet writing error %s", err.Error())
-			}
-		}
-	}
-
-	return nil
-}
-
-func buildTags(ptTags map[string]string) []string {
-	tags := make([]string, len(ptTags))
-	index := 0
-	for k, v := range ptTags {
-		tags[index] = fmt.Sprintf("%s=%s", k, v)
-		index += 1
-	}
-	sort.Strings(tags)
-	return tags
-}
-
-func buildMetrics(pt *client.Point, now time.Time, prefix string) []*MetricLine {
-	ret := []*MetricLine{}
-	for fieldName, value := range pt.Fields() {
-		metric := &MetricLine{
-			Metric:    fmt.Sprintf("%s%s_%s", prefix, pt.Name(), fieldName),
-			Timestamp: now.Unix(),
-		}
-
-		metricValue, buildError := buildValue(value)
-		if buildError != nil {
-			fmt.Printf("OpenTSDB: %s\n", buildError.Error())
-			continue
-		}
-		metric.Value = metricValue
-		tagsSlice := buildTags(pt.Tags())
-		metric.Tags = fmt.Sprint(strings.Join(tagsSlice, " "))
-		ret = append(ret, metric)
-	}
-	return ret
-}
-
-func buildValue(v interface{}) (string, error) {
-	var retv string
-	switch p := v.(type) {
-	case int64:
-		retv = IntToString(int64(p))
-	case uint64:
-		retv = UIntToString(uint64(p))
-	case float64:
-		retv = FloatToString(float64(p))
-	default:
-		return retv, fmt.Errorf("unexpected type %T with value %v for OpenTSDB", v, v)
-	}
-	return retv, nil
-}
-
-func IntToString(input_num int64) string {
-	return strconv.FormatInt(input_num, 10)
-}
-
-func UIntToString(input_num uint64) string {
-	return strconv.FormatUint(input_num, 10)
-}
-
-func FloatToString(input_num float64) string {
-	return strconv.FormatFloat(input_num, 'f', 6, 64)
-}
-
-func (o *OpenTSDB) SampleConfig() string {
-	return sampleConfig
-}
-
-func (o *OpenTSDB) Description() string {
-	return "Configuration for OpenTSDB server to send metrics to"
-}
-
-func (o *OpenTSDB) Close() error {
-	return nil
-}
-
-func init() {
-	outputs.Add("opentsdb", func() outputs.Output {
-		return &OpenTSDB{}
-	})
-}

outputs/opentsdb/opentsdb_test.go

@@ -1,71 +0,0 @@
-package opentsdb
-
-import (
-	"reflect"
-	"testing"
-
-	"github.com/influxdb/telegraf/testutil"
-	"github.com/stretchr/testify/require"
-)
-
-func TestBuildTagsTelnet(t *testing.T) {
-	var tagtests = []struct {
-		ptIn    map[string]string
-		outTags []string
-	}{
-		{
-			map[string]string{"one": "two", "three": "four"},
-			[]string{"one=two", "three=four"},
-		},
-		{
-			map[string]string{"aaa": "bbb"},
-			[]string{"aaa=bbb"},
-		},
-		{
-			map[string]string{"one": "two", "aaa": "bbb"},
-			[]string{"aaa=bbb", "one=two"},
-		},
-		{
-			map[string]string{},
-			[]string{},
-		},
-	}
-	for _, tt := range tagtests {
-		tags := buildTags(tt.ptIn)
-		if !reflect.DeepEqual(tags, tt.outTags) {
-			t.Errorf("\nexpected %+v\ngot %+v\n", tt.outTags, tags)
-		}
-	}
-}
-
-func TestWrite(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping integration test in short mode")
-	}
-
-	o := &OpenTSDB{
-		Host:   testutil.GetLocalHost(),
-		Port:   4242,
-		Prefix: "prefix.test.",
-	}
-
-	// Verify that we can connect to the OpenTSDB instance
-	err := o.Connect()
-	require.NoError(t, err)
-
-	// Verify that we can successfully write data to OpenTSDB
-	err = o.Write(testutil.MockBatchPoints().Points())
-	require.NoError(t, err)
-
-	// Verify postive and negative test cases of writing data
-	bp := testutil.MockBatchPoints()
-	bp.AddPoint(testutil.TestPoint(float64(1.0), "justametric.float"))
-	bp.AddPoint(testutil.TestPoint(int64(123456789), "justametric.int"))
-	bp.AddPoint(testutil.TestPoint(uint64(123456789012345), "justametric.uint"))
-	bp.AddPoint(testutil.TestPoint("Lorem Ipsum", "justametric.string"))
-	bp.AddPoint(testutil.TestPoint(float64(42.0), "justametric.anotherfloat"))
-
-	err = o.Write(bp.Points())
-	require.NoError(t, err)
-
-}

outputs/prometheus_client/prometheus_client.go

@@ -1,125 +0,0 @@
-package prometheus_client
-
-import (
-	"fmt"
-	"log"
-	"net/http"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-type PrometheusClient struct {
-	Listen  string
-	metrics map[string]*prometheus.UntypedVec
-}
-
-var sampleConfig = `
-  # Address to listen on
-  # listen = ":9126"
-`
-
-func (p *PrometheusClient) Start() error {
-	if p.Listen == "" {
-		p.Listen = "localhost:9126"
-	}
-
-	http.Handle("/metrics", prometheus.Handler())
-	server := &http.Server{
-		Addr: p.Listen,
-	}
-
-	p.metrics = make(map[string]*prometheus.UntypedVec)
-	go server.ListenAndServe()
-	return nil
-}
-
-func (p *PrometheusClient) Stop() {
-	// TODO: Use a listener for http.Server that counts active connections
-	//       that can be stopped and closed gracefully
-}
-
-func (p *PrometheusClient) Connect() error {
-	// This service output does not need to make any further connections
-	return nil
-}
-
-func (p *PrometheusClient) Close() error {
-	// This service output does not need to close any of its connections
-	return nil
-}
-
-func (p *PrometheusClient) SampleConfig() string {
-	return sampleConfig
-}
-
-func (p *PrometheusClient) Description() string {
-	return "Configuration for the Prometheus client to spawn"
-}
-
-func (p *PrometheusClient) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-
-	for _, point := range points {
-		var labels []string
-		key := point.Name()
-
-		for k, _ := range point.Tags() {
-			if len(k) > 0 {
-				labels = append(labels, k)
-			}
-		}
-
-		if _, ok := p.metrics[key]; !ok {
-			p.metrics[key] = prometheus.NewUntypedVec(
-				prometheus.UntypedOpts{
-					Name: key,
-					Help: fmt.Sprintf("Telegraf collected point '%s'", key),
-				},
-				labels,
-			)
-			prometheus.MustRegister(p.metrics[key])
-		}
-
-		l := prometheus.Labels{}
-		for tk, tv := range point.Tags() {
-			l[tk] = tv
-		}
-
-		for _, val := range point.Fields() {
-			switch val := val.(type) {
-			default:
-				log.Printf("Prometheus output, unsupported type. key: %s, type: %T\n",
-					key, val)
-			case int64:
-				m, err := p.metrics[key].GetMetricWith(l)
-				if err != nil {
-					log.Printf("ERROR Getting metric in Prometheus output, "+
-						"key: %s, labels: %v,\nerr: %s\n",
-						key, l, err.Error())
-					continue
-				}
-				m.Set(float64(val))
-			case float64:
-				m, err := p.metrics[key].GetMetricWith(l)
-				if err != nil {
-					log.Printf("ERROR Getting metric in Prometheus output, "+
-						"key: %s, labels: %v,\nerr: %s\n",
-						key, l, err.Error())
-					continue
-				}
-				m.Set(val)
-			}
-		}
-	}
-	return nil
-}
-
-func init() {
-	outputs.Add("prometheus_client", func() outputs.Output {
-		return &PrometheusClient{}
-	})
-}

outputs/prometheus_client/prometheus_client_test.go

@@ -1,98 +0,0 @@
-package prometheus_client
-
-import (
-	"testing"
-
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/plugins/prometheus"
-	"github.com/influxdb/telegraf/testutil"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-var pTesting *PrometheusClient
-
-func TestPrometheusWritePointEmptyTag(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping integration test in short mode")
-	}
-
-	p := &prometheus.Prometheus{
-		Urls: []string{"http://localhost:9126/metrics"},
-	}
-	tags := make(map[string]string)
-	pt1, _ := client.NewPoint(
-		"test_point_1",
-		tags,
-		map[string]interface{}{"value": 0.0})
-	pt2, _ := client.NewPoint(
-		"test_point_2",
-		tags,
-		map[string]interface{}{"value": 1.0})
-	var points = []*client.Point{
-		pt1,
-		pt2,
-	}
-	require.NoError(t, pTesting.Write(points))
-
-	expected := []struct {
-		name  string
-		value float64
-		tags  map[string]string
-	}{
-		{"test_point_1", 0.0, tags},
-		{"test_point_2", 1.0, tags},
-	}
-
-	var acc testutil.Accumulator
-
-	require.NoError(t, p.Gather(&acc))
-	for _, e := range expected {
-		assert.NoError(t, acc.ValidateValue(e.name, e.value))
-	}
-}
-
-func TestPrometheusWritePointTag(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping integration test in short mode")
-	}
-
-	p := &prometheus.Prometheus{
-		Urls: []string{"http://localhost:9126/metrics"},
-	}
-	tags := make(map[string]string)
-	tags["testtag"] = "testvalue"
-	pt1, _ := client.NewPoint(
-		"test_point_3",
-		tags,
-		map[string]interface{}{"value": 0.0})
-	pt2, _ := client.NewPoint(
-		"test_point_4",
-		tags,
-		map[string]interface{}{"value": 1.0})
-	var points = []*client.Point{
-		pt1,
-		pt2,
-	}
-	require.NoError(t, pTesting.Write(points))
-
-	expected := []struct {
-		name  string
-		value float64
-	}{
-		{"test_point_3", 0.0},
-		{"test_point_4", 1.0},
-	}
-
-	var acc testutil.Accumulator
-
-	require.NoError(t, p.Gather(&acc))
-	for _, e := range expected {
-		assert.True(t, acc.CheckTaggedValue(e.name, e.value, tags))
-	}
-}
-
-func init() {
-	pTesting = &PrometheusClient{Listen: "localhost:9126"}
-	pTesting.Start()
-}

outputs/riemann/riemann.go

@@ -1,101 +0,0 @@
-package riemann
-
-import (
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/amir/raidman"
-	"github.com/influxdb/influxdb/client/v2"
-	"github.com/influxdb/telegraf/outputs"
-)
-
-type Riemann struct {
-	URL       string
-	Transport string
-
-	client *raidman.Client
-}
-
-var sampleConfig = `
-  # URL of server
-  url = "localhost:5555"
-  # transport protocol to use either tcp or udp
-  transport = "tcp"
-`
-
-func (r *Riemann) Connect() error {
-	c, err := raidman.Dial(r.Transport, r.URL)
-
-	if err != nil {
-		return err
-	}
-
-	r.client = c
-	return nil
-}
-
-func (r *Riemann) Close() error {
-	r.client.Close()
-	return nil
-}
-
-func (r *Riemann) SampleConfig() string {
-	return sampleConfig
-}
-
-func (r *Riemann) Description() string {
-	return "Configuration for the Riemann server to send metrics to"
-}
-
-func (r *Riemann) Write(points []*client.Point) error {
-	if len(points) == 0 {
-		return nil
-	}
-
-	var events []*raidman.Event
-	for _, p := range points {
-		evs := buildEvents(p)
-		for _, ev := range evs {
-			events = append(events, ev)
-		}
-	}
-
-	var senderr = r.client.SendMulti(events)
-	if senderr != nil {
-		return errors.New(fmt.Sprintf("FAILED to send riemann message: %s\n",
-			senderr))
-	}
-
-	return nil
-}
-
-func buildEvents(p *client.Point) []*raidman.Event {
-	events := []*raidman.Event{}
-	for fieldName, value := range p.Fields() {
-		host, ok := p.Tags()["host"]
-		if !ok {
-			hostname, err := os.Hostname()
-			if err != nil {
-				host = "unknown"
-			} else {
-				host = hostname
-			}
-		}
-
-		event := &raidman.Event{
-			Host:    host,
-			Service: p.Name() + "_" + fieldName,
-			Metric:  value,
-		}
-		events = append(events, event)
-	}
-
-	return events
-}
-
-func init() {
-	outputs.Add("riemann", func() outputs.Output {
-		return &Riemann{}
-	})
-}

plugins/aerospike/README.md

@@ -1,265 +0,0 @@
-## Telegraf Plugin: Aerospike
-
-#### Plugin arguments:
-- **servers** string array: List of aerospike servers to query (def: 127.0.0.1:3000)
-
-#### Description
-
-The aerospike plugin queries aerospike server(s) and get node statistics. It also collects stats for
-all the configured namespaces.
-
-For what the measurements mean, please consult the [Aerospike Metrics Reference Docs](http://www.aerospike.com/docs/reference/metrics).
-
-The metric names, to make it less complicated in querying, have replaced all `-` with `_` as Aerospike metrics come in both forms (no idea why).
-
-# Measurements:
-#### Aerospike Statistics [values]:
-
-Meta:
-- units: Integer
-
-Measurement names:
-- batch_index_queue
-- batch_index_unused_buffers
-- batch_queue
-- batch_tree_count
-- client_connections
-- data_used_bytes_memory
-- index_used_bytes_memory
-- info_queue
-- migrate_progress_recv
-- migrate_progress_send
-- migrate_rx_objs
-- migrate_tx_objs
-- objects
-- ongoing_write_reqs
-- partition_absent
-- partition_actual
-- partition_desync
-- partition_object_count
-- partition_ref_count
-- partition_replica
-- proxy_in_progress
-- query_agg_avg_rec_count
-- query_avg_rec_count
-- query_lookup_avg_rec_count
-- queue
-- record_locks
-- record_refs
-- sindex_used_bytes_memory
-- sindex_gc_garbage_cleaned
-- system_free_mem_pct
-- total_bytes_disk
-- total_bytes_memory
-- tree_count
-- scans_active
-- uptime
-- used_bytes_disk
-- used_bytes_memory
-- cluster_size
-- waiting_transactions
-
-#### Aerospike Statistics [cumulative]:
-
-Meta:
-- units: Integer
-
-Measurement names:
-- batch_errors
-- batch_index_complete
-- batch_index_errors
-- batch_index_initiate
-- batch_index_timeout
-- batch_initiate
-- batch_timeout
-- err_duplicate_proxy_request
-- err_out_of_space
-- err_replica_non_null_node
-- err_replica_null_node
-- err_rw_cant_put_unique
-- err_rw_pending_limit
-- err_rw_request_not_found
-- err_storage_queue_full
-- err_sync_copy_null_master
-- err_sync_copy_null_node
-- err_tsvc_requests
-- err_write_fail_bin_exists
-- err_write_fail_generation
-- err_write_fail_generation_xdr
-- err_write_fail_incompatible_type
-- err_write_fail_key_exists
-- err_write_fail_key_mismatch
-- err_write_fail_not_found
-- err_write_fail_noxdr
-- err_write_fail_parameter
-- err_write_fail_prole_delete
-- err_write_fail_prole_generation
-- err_write_fail_prole_unknown
-- err_write_fail_unknown
-- fabric_msgs_rcvd
-- fabric_msgs_sent
-- heartbeat_received_foreign
-- heartbeat_received_self
-- migrate_msgs_recv
-- migrate_msgs_sent
-- migrate_num_incoming_accepted
-- migrate_num_incoming_refused
-- proxy_action
-- proxy_initiate
-- proxy_retry
-- proxy_retry_new_dest
-- proxy_retry_q_full
-- proxy_retry_same_dest
-- proxy_unproxy
-- query_abort
-- query_agg
-- query_agg_abort
-- query_agg_err
-- query_agg_success
-- query_bad_records
-- query_fail
-- query_long_queue_full
-- query_long_running
-- query_lookup_abort
-- query_lookup_err
-- query_lookups
-- query_lookup_success
-- query_reqs
-- query_short_queue_full
-- query_short_running
-- query_success
-- query_tracked
-- read_dup_prole
-- reaped_fds
-- rw_err_ack_badnode
-- rw_err_ack_internal
-- rw_err_ack_nomatch
-- rw_err_dup_cluster_key
-- rw_err_dup_internal
-- rw_err_dup_send
-- rw_err_write_cluster_key
-- rw_err_write_internal
-- rw_err_write_send
-- sindex_ucgarbage_found
-- sindex_gc_locktimedout
-- sindex_gc_inactivity_dur
-- sindex_gc_activity_dur
-- sindex_gc_list_creation_time
-- sindex_gc_list_deletion_time
-- sindex_gc_objects_validated
-- sindex_gc_garbage_found
-- stat_cluster_key_err_ack_dup_trans_reenqueue
-- stat_cluster_key_err_ack_rw_trans_reenqueue
-- stat_cluster_key_prole_retry
-- stat_cluster_key_regular_processed
-- stat_cluster_key_trans_to_proxy_retry
-- stat_deleted_set_object
-- stat_delete_success
-- stat_duplicate_operation
-- stat_evicted_objects
-- stat_evicted_objects_time
-- stat_evicted_set_objects
-- stat_expired_objects
-- stat_nsup_deletes_not_shipped
-- stat_proxy_errs
-- stat_proxy_reqs
-- stat_proxy_reqs_xdr
-- stat_proxy_success
-- stat_read_errs_notfound
-- stat_read_errs_other
-- stat_read_reqs
-- stat_read_reqs_xdr
-- stat_read_success
-- stat_rw_timeout
-- stat_slow_trans_queue_batch_pop
-- stat_slow_trans_queue_pop
-- stat_slow_trans_queue_push
-- stat_write_errs
-- stat_write_errs_notfound
-- stat_write_errs_other
-- stat_write_reqs
-- stat_write_reqs_xdr
-- stat_write_success
-- stat_xdr_pipe_miss
-- stat_xdr_pipe_writes
-- stat_zero_bin_records
-- storage_defrag_corrupt_record
-- storage_defrag_wait
-- transactions
-- basic_scans_succeeded
-- basic_scans_failed
-- aggr_scans_succeeded
-- aggr_scans_failed
-- udf_bg_scans_succeeded
-- udf_bg_scans_failed
-- udf_delete_err_others
-- udf_delete_reqs
-- udf_delete_success
-- udf_lua_errs
-- udf_query_rec_reqs
-- udf_read_errs_other
-- udf_read_reqs
-- udf_read_success
-- udf_replica_writes
-- udf_scan_rec_reqs
-- udf_write_err_others
-- udf_write_reqs
-- udf_write_success
-- write_master
-- write_prole
-
-#### Aerospike Statistics [percentage]:
-
-Meta:
-- units: percent (out of 100)
-
-Measurement names:
-- free_pct_disk
-- free_pct_memory
-
-# Measurements:
-#### Aerospike Namespace Statistics [values]:
-
-Meta:
-- units: Integer
-- tags: `namespace=<namespace>`
-
-Measurement names:
-- available_bin_names
-- available_pct
-- current_time
-- data_used_bytes_memory
-- index_used_bytes_memory
-- master_objects
-- max_evicted_ttl
-- max_void_time
-- non_expirable_objects
-- objects
-- prole_objects
-- sindex_used_bytes_memory
-- total_bytes_disk
-- total_bytes_memory
-- used_bytes_disk
-- used_bytes_memory
-
-#### Aerospike Namespace Statistics [cumulative]:
-
-Meta:
-- units: Integer
-- tags: `namespace=<namespace>`
-
-Measurement names:
-- evicted_objects
-- expired_objects
-- set_deleted_objects
-- set_evicted_objects
-
-#### Aerospike Namespace Statistics [percentage]:
-
-Meta:
-- units: percent (out of 100)
-- tags: `namespace=<namespace>`
-
-Measurement names:
-- free_pct_disk
-- free_pct_memory

plugins/aerospike/aerospike.go

@@ -1,342 +0,0 @@
-package aerospike
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-	"github.com/influxdb/telegraf/plugins"
-	"net"
-	"strconv"
-	"strings"
-	"sync"
-)
-
-const (
-	MSG_HEADER_SIZE = 8
-	MSG_TYPE        = 1 // Info is 1
-	MSG_VERSION     = 2
-)
-
-var (
-	STATISTICS_COMMAND = []byte("statistics\n")
-	NAMESPACES_COMMAND = []byte("namespaces\n")
-)
-
-type aerospikeMessageHeader struct {
-	Version uint8
-	Type    uint8
-	DataLen [6]byte
-}
-
-type aerospikeMessage struct {
-	aerospikeMessageHeader
-	Data []byte
-}
-
-// Taken from aerospike-client-go/types/message.go
-func (msg *aerospikeMessage) Serialize() []byte {
-	msg.DataLen = msgLenToBytes(int64(len(msg.Data)))
-	buf := bytes.NewBuffer([]byte{})
-	binary.Write(buf, binary.BigEndian, msg.aerospikeMessageHeader)
-	binary.Write(buf, binary.BigEndian, msg.Data[:])
-	return buf.Bytes()
-}
-
-type aerospikeInfoCommand struct {
-	msg *aerospikeMessage
-}
-
-// Taken from aerospike-client-go/info.go
-func (nfo *aerospikeInfoCommand) parseMultiResponse() (map[string]string, error) {
-	responses := make(map[string]string)
-	offset := int64(0)
-	begin := int64(0)
-
-	dataLen := int64(len(nfo.msg.Data))
-
-	// Create reusable StringBuilder for performance.
-	for offset < dataLen {
-		b := nfo.msg.Data[offset]
-
-		if b == '\t' {
-			name := nfo.msg.Data[begin:offset]
-			offset++
-			begin = offset
-
-			// Parse field value.
-			for offset < dataLen {
-				if nfo.msg.Data[offset] == '\n' {
-					break
-				}
-				offset++
-			}
-
-			if offset > begin {
-				value := nfo.msg.Data[begin:offset]
-				responses[string(name)] = string(value)
-			} else {
-				responses[string(name)] = ""
-			}
-			offset++
-			begin = offset
-		} else if b == '\n' {
-			if offset > begin {
-				name := nfo.msg.Data[begin:offset]
-				responses[string(name)] = ""
-			}
-			offset++
-			begin = offset
-		} else {
-			offset++
-		}
-	}
-
-	if offset > begin {
-		name := nfo.msg.Data[begin:offset]
-		responses[string(name)] = ""
-	}
-	return responses, nil
-}
-
-type Aerospike struct {
-	Servers []string
-}
-
-var sampleConfig = `
-  # Aerospike servers to connect to (with port)
-  # Default: servers = ["localhost:3000"]
-  #
-  # This plugin will query all namespaces the aerospike
-  # server has configured and get stats for them.
-  servers = ["localhost:3000"]
- `
-
-func (a *Aerospike) SampleConfig() string {
-	return sampleConfig
-}
-
-func (a *Aerospike) Description() string {
-	return "Read stats from an aerospike server"
-}
-
-func (a *Aerospike) Gather(acc plugins.Accumulator) error {
-	if len(a.Servers) == 0 {
-		return a.gatherServer("127.0.0.1:3000", acc)
-	}
-
-	var wg sync.WaitGroup
-
-	var outerr error
-
-	for _, server := range a.Servers {
-		wg.Add(1)
-		go func(server string) {
-			defer wg.Done()
-			outerr = a.gatherServer(server, acc)
-		}(server)
-	}
-
-	wg.Wait()
-	return outerr
-}
-
-func (a *Aerospike) gatherServer(host string, acc plugins.Accumulator) error {
-	aerospikeInfo, err := getMap(STATISTICS_COMMAND, host)
-	if err != nil {
-		return fmt.Errorf("Aerospike info failed: %s", err)
-	}
-	readAerospikeStats(aerospikeInfo, acc, host, "")
-	namespaces, err := getList(NAMESPACES_COMMAND, host)
-	if err != nil {
-		return fmt.Errorf("Aerospike namespace list failed: %s", err)
-	}
-	for ix := range namespaces {
-		nsInfo, err := getMap([]byte("namespace/"+namespaces[ix]+"\n"), host)
-		if err != nil {
-			return fmt.Errorf("Aerospike namespace '%s' query failed: %s", namespaces[ix], err)
-		}
-		readAerospikeStats(nsInfo, acc, host, namespaces[ix])
-	}
-	return nil
-}
-
-func getMap(key []byte, host string) (map[string]string, error) {
-	data, err := get(key, host)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to get data: %s", err)
-	}
-	parsed, err := unmarshalMapInfo(data, string(key))
-	if err != nil {
-		return nil, fmt.Errorf("Failed to unmarshal data: %s", err)
-	}
-
-	return parsed, nil
-}
-
-func getList(key []byte, host string) ([]string, error) {
-	data, err := get(key, host)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to get data: %s", err)
-	}
-	parsed, err := unmarshalListInfo(data, string(key))
-	if err != nil {
-		return nil, fmt.Errorf("Failed to unmarshal data: %s", err)
-	}
-
-	return parsed, nil
-}
-
-func get(key []byte, host string) (map[string]string, error) {
-	var err error
-	var data map[string]string
-
-	asInfo := &aerospikeInfoCommand{
-		msg: &aerospikeMessage{
-			aerospikeMessageHeader: aerospikeMessageHeader{
-				Version: uint8(MSG_VERSION),
-				Type:    uint8(MSG_TYPE),
-				DataLen: msgLenToBytes(int64(len(key))),
-			},
-			Data: key,
-		},
-	}
-
-	cmd := asInfo.msg.Serialize()
-	addr, err := net.ResolveTCPAddr("tcp", host)
-	if err != nil {
-		return data, fmt.Errorf("Lookup failed for '%s': %s", host, err)
-	}
-
-	conn, err := net.DialTCP("tcp", nil, addr)
-	if err != nil {
-		return data, fmt.Errorf("Connection failed for '%s': %s", host, err)
-	}
-	defer conn.Close()
-
-	_, err = conn.Write(cmd)
-	if err != nil {
-		return data, fmt.Errorf("Failed to send to '%s': %s", host, err)
-	}
-
-	msgHeader := bytes.NewBuffer(make([]byte, MSG_HEADER_SIZE))
-	_, err = readLenFromConn(conn, msgHeader.Bytes(), MSG_HEADER_SIZE)
-	if err != nil {
-		return data, fmt.Errorf("Failed to read header: %s", err)
-	}
-	err = binary.Read(msgHeader, binary.BigEndian, &asInfo.msg.aerospikeMessageHeader)
-	if err != nil {
-		return data, fmt.Errorf("Failed to unmarshal header: %s", err)
-	}
-
-	msgLen := msgLenFromBytes(asInfo.msg.aerospikeMessageHeader.DataLen)
-
-	if int64(len(asInfo.msg.Data)) != msgLen {
-		asInfo.msg.Data = make([]byte, msgLen)
-	}
-
-	_, err = readLenFromConn(conn, asInfo.msg.Data, len(asInfo.msg.Data))
-	if err != nil {
-		return data, fmt.Errorf("Failed to read from connection to '%s': %s", host, err)
-	}
-
-	data, err = asInfo.parseMultiResponse()
-	if err != nil {
-		return data, fmt.Errorf("Failed to parse response from '%s': %s", host, err)
-	}
-
-	return data, err
-}
-
-func readAerospikeStats(
-	stats map[string]string,
-	acc plugins.Accumulator,
-	host string,
-	namespace string,
-) {
-	fields := make(map[string]interface{})
-	tags := map[string]string{
-		"aerospike_host": host,
-		"namespace":      "_service",
-	}
-
-	if namespace != "" {
-		tags["namespace"] = namespace
-	}
-	for key, value := range stats {
-		// We are going to ignore all string based keys
-		val, err := strconv.ParseInt(value, 10, 64)
-		if err == nil {
-			if strings.Contains(key, "-") {
-				key = strings.Replace(key, "-", "_", -1)
-			}
-			fields[key] = val
-		}
-	}
-	acc.AddFields("aerospike", fields, tags)
-}
-
-func unmarshalMapInfo(infoMap map[string]string, key string) (map[string]string, error) {
-	key = strings.TrimSuffix(key, "\n")
-	res := map[string]string{}
-
-	v, exists := infoMap[key]
-	if !exists {
-		return res, fmt.Errorf("Key '%s' missing from info", key)
-	}
-
-	values := strings.Split(v, ";")
-	for i := range values {
-		kv := strings.Split(values[i], "=")
-		if len(kv) > 1 {
-			res[kv[0]] = kv[1]
-		}
-	}
-
-	return res, nil
-}
-
-func unmarshalListInfo(infoMap map[string]string, key string) ([]string, error) {
-	key = strings.TrimSuffix(key, "\n")
-
-	v, exists := infoMap[key]
-	if !exists {
-		return []string{}, fmt.Errorf("Key '%s' missing from info", key)
-	}
-
-	values := strings.Split(v, ";")
-	return values, nil
-}
-
-func readLenFromConn(c net.Conn, buffer []byte, length int) (total int, err error) {
-	var r int
-	for total < length {
-		r, err = c.Read(buffer[total:length])
-		total += r
-		if err != nil {
-			break
-		}
-	}
-	return
-}
-
-// Taken from aerospike-client-go/types/message.go
-func msgLenToBytes(DataLen int64) [6]byte {
-	b := make([]byte, 8)
-	binary.BigEndian.PutUint64(b, uint64(DataLen))
-	res := [6]byte{}
-	copy(res[:], b[2:])
-	return res
-}
-
-// Taken from aerospike-client-go/types/message.go
-func msgLenFromBytes(buf [6]byte) int64 {
-	nbytes := append([]byte{0, 0}, buf[:]...)
-	DataLen := binary.BigEndian.Uint64(nbytes)
-	return int64(DataLen)
-}
-
-func init() {
-	plugins.Add("aerospike", func() plugins.Plugin {
-		return &Aerospike{}
-	})
-}

plugins/aerospike/aerospike_test.go

@@ -1,112 +0,0 @@
-package aerospike
-
-import (
-	"github.com/influxdb/telegraf/testutil"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"reflect"
-	"testing"
-)
-
-func TestAerospikeStatistics(t *testing.T) {
-	if testing.Short() {
-		t.Skip("Skipping integration test in short mode")
-	}
-
-	a := &Aerospike{
-		Servers: []string{testutil.GetLocalHost() + ":3000"},
-	}
-
-	var acc testutil.Accumulator
-
-	err := a.Gather(&acc)
-	require.NoError(t, err)
-
-	// Only use a few of the metrics
-	asMetrics := []string{
-		"transactions",
-		"stat_write_errs",
-		"stat_read_reqs",
-		"stat_write_reqs",
-	}
-
-	for _, metric := range asMetrics {
-		assert.True(t, acc.HasIntValue(metric), metric)
-	}
-
-}
-
-func TestAerospikeMsgLenFromToBytes(t *testing.T) {
-	var i int64 = 8
-	assert.True(t, i == msgLenFromBytes(msgLenToBytes(i)))
-}
-
-func TestReadAerospikeStatsNoNamespace(t *testing.T) {
-	// Also test for re-writing
-	var acc testutil.Accumulator
-	stats := map[string]string{
-		"stat-write-errs": "12345",
-		"stat_read_reqs":  "12345",
-	}
-	readAerospikeStats(stats, &acc, "host1", "")
-	for k := range stats {
-		if k == "stat-write-errs" {
-			k = "stat_write_errs"
-		}
-		assert.True(t, acc.HasMeasurement(k))
-		assert.True(t, acc.CheckValue(k, int64(12345)))
-	}
-}
-
-func TestReadAerospikeStatsNamespace(t *testing.T) {
-	var acc testutil.Accumulator
-	stats := map[string]string{
-		"stat_write_errs": "12345",
-		"stat_read_reqs":  "12345",
-	}
-	readAerospikeStats(stats, &acc, "host1", "test")
-
-	tags := map[string]string{
-		"aerospike_host": "host1",
-		"namespace":      "test",
-	}
-	for k := range stats {
-		assert.True(t, acc.ValidateTaggedValue(k, int64(12345), tags) == nil)
-	}
-}
-
-func TestAerospikeUnmarshalList(t *testing.T) {
-	i := map[string]string{
-		"test": "one;two;three",
-	}
-
-	expected := []string{"one", "two", "three"}
-
-	list, err := unmarshalListInfo(i, "test2")
-	assert.True(t, err != nil)
-
-	list, err = unmarshalListInfo(i, "test")
-	assert.True(t, err == nil)
-	equal := true
-	for ix := range expected {
-		if list[ix] != expected[ix] {
-			equal = false
-			break
-		}
-	}
-	assert.True(t, equal)
-}
-
-func TestAerospikeUnmarshalMap(t *testing.T) {
-	i := map[string]string{
-		"test": "key1=value1;key2=value2",
-	}
-
-	expected := map[string]string{
-		"key1": "value1",
-		"key2": "value2",
-	}
-	m, err := unmarshalMapInfo(i, "test")
-	assert.True(t, err == nil)
-	assert.True(t, reflect.DeepEqual(m, expected))
-}

plugins/aggregators/all/all.go

@@ -0,0 +1,5 @@
+package all
+
+import (
+	_ "github.com/influxdata/telegraf/plugins/aggregators/minmax"
+)

plugins/aggregators/minmax/README.md

@@ -0,0 +1,42 @@
+# MinMax Aggregator Plugin
+
+The minmax aggregator plugin aggregates min & max values of each field it sees,
+emitting the aggrate every `period` seconds.
+
+### Configuration:
+
+```toml
+# Keep the aggregate min/max of each metric passing through.
+[[aggregators.minmax]]
+  ## General Aggregator Arguments:
+  ## The period on which to flush & clear the aggregator.
+  period = "30s"
+  ## If true, the original metric will be dropped by the
+  ## aggregator and will not get sent to the output plugins.
+  drop_original = false
+```
+
+### Measurements & Fields:
+
+- measurement1
+    - field1_max
+    - field1_min
+
+### Tags:
+
+No tags are applied by this aggregator.
+
+### Example Output:
+
+```
+$ telegraf --config telegraf.conf --quiet
+system,host=tars load1=1.72 1475583980000000000
+system,host=tars load1=1.6 1475583990000000000
+system,host=tars load1=1.66 1475584000000000000
+system,host=tars load1=1.63 1475584010000000000
+system,host=tars load1_max=1.72,load1_min=1.6 1475584010000000000
+system,host=tars load1=1.46 1475584020000000000
+system,host=tars load1=1.39 1475584030000000000
+system,host=tars load1=1.41 1475584040000000000
+system,host=tars load1_max=1.46,load1_min=1.39 1475584040000000000
+```

plugins/aggregators/minmax/minmax.go

@@ -0,0 +1,119 @@
+package minmax
+
+import (
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/aggregators"
+)
+
+type MinMax struct {
+	cache map[uint64]aggregate
+}
+
+func NewMinMax() telegraf.Aggregator {
+	mm := &MinMax{}
+	mm.Reset()
+	return mm
+}
+
+type aggregate struct {
+	fields map[string]minmax
+	name   string
+	tags   map[string]string
+}
+
+type minmax struct {
+	min float64
+	max float64
+}
+
+var sampleConfig = `
+  ## General Aggregator Arguments:
+  ## The period on which to flush & clear the aggregator.
+  period = "30s"
+  ## If true, the original metric will be dropped by the
+  ## aggregator and will not get sent to the output plugins.
+  drop_original = false
+`
+
+func (m *MinMax) SampleConfig() string {
+	return sampleConfig
+}
+
+func (m *MinMax) Description() string {
+	return "Keep the aggregate min/max of each metric passing through."
+}
+
+func (m *MinMax) Add(in telegraf.Metric) {
+	id := in.HashID()
+	if _, ok := m.cache[id]; !ok {
+		// hit an uncached metric, create caches for first time:
+		a := aggregate{
+			name:   in.Name(),
+			tags:   in.Tags(),
+			fields: make(map[string]minmax),
+		}
+		for k, v := range in.Fields() {
+			if fv, ok := convert(v); ok {
+				a.fields[k] = minmax{
+					min: fv,
+					max: fv,
+				}
+			}
+		}
+		m.cache[id] = a
+	} else {
+		for k, v := range in.Fields() {
+			if fv, ok := convert(v); ok {
+				if _, ok := m.cache[id].fields[k]; !ok {
+					// hit an uncached field of a cached metric
+					m.cache[id].fields[k] = minmax{
+						min: fv,
+						max: fv,
+					}
+					continue
+				}
+				if fv < m.cache[id].fields[k].min {
+					tmp := m.cache[id].fields[k]
+					tmp.min = fv
+					m.cache[id].fields[k] = tmp
+				} else if fv > m.cache[id].fields[k].max {
+					tmp := m.cache[id].fields[k]
+					tmp.max = fv
+					m.cache[id].fields[k] = tmp
+				}
+			}
+		}
+	}
+}
+
+func (m *MinMax) Push(acc telegraf.Accumulator) {
+	for _, aggregate := range m.cache {
+		fields := map[string]interface{}{}
+		for k, v := range aggregate.fields {
+			fields[k+"_min"] = v.min
+			fields[k+"_max"] = v.max
+		}
+		acc.AddFields(aggregate.name, fields, aggregate.tags)
+	}
+}
+
+func (m *MinMax) Reset() {
+	m.cache = make(map[uint64]aggregate)
+}
+
+func convert(in interface{}) (float64, bool) {
+	switch v := in.(type) {
+	case float64:
+		return v, true
+	case int64:
+		return float64(v), true
+	default:
+		return 0, false
+	}
+}
+
+func init() {
+	aggregators.Add("minmax", func() telegraf.Aggregator {
+		return NewMinMax()
+	})
+}

plugins/aggregators/minmax/minmax_test.go

@@ -0,0 +1,162 @@
+package minmax
+
+import (
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf/metric"
+	"github.com/influxdata/telegraf/testutil"
+)
+
+var m1, _ = metric.New("m1",
+	map[string]string{"foo": "bar"},
+	map[string]interface{}{
+		"a": int64(1),
+		"b": int64(1),
+		"c": int64(1),
+		"d": int64(1),
+		"e": int64(1),
+		"f": float64(2),
+		"g": float64(2),
+		"h": float64(2),
+		"i": float64(2),
+		"j": float64(3),
+	},
+	time.Now(),
+)
+var m2, _ = metric.New("m1",
+	map[string]string{"foo": "bar"},
+	map[string]interface{}{
+		"a":        int64(1),
+		"b":        int64(3),
+		"c":        int64(3),
+		"d":        int64(3),
+		"e":        int64(3),
+		"f":        float64(1),
+		"g":        float64(1),
+		"h":        float64(1),
+		"i":        float64(1),
+		"j":        float64(1),
+		"k":        float64(200),
+		"ignoreme": "string",
+		"andme":    true,
+	},
+	time.Now(),
+)
+
+func BenchmarkApply(b *testing.B) {
+	minmax := NewMinMax()
+
+	for n := 0; n < b.N; n++ {
+		minmax.Add(m1)
+		minmax.Add(m2)
+	}
+}
+
+// Test two metrics getting added.
+func TestMinMaxWithPeriod(t *testing.T) {
+	acc := testutil.Accumulator{}
+	minmax := NewMinMax()
+
+	minmax.Add(m1)
+	minmax.Add(m2)
+	minmax.Push(&acc)
+
+	expectedFields := map[string]interface{}{
+		"a_max": float64(1),
+		"a_min": float64(1),
+		"b_max": float64(3),
+		"b_min": float64(1),
+		"c_max": float64(3),
+		"c_min": float64(1),
+		"d_max": float64(3),
+		"d_min": float64(1),
+		"e_max": float64(3),
+		"e_min": float64(1),
+		"f_max": float64(2),
+		"f_min": float64(1),
+		"g_max": float64(2),
+		"g_min": float64(1),
+		"h_max": float64(2),
+		"h_min": float64(1),
+		"i_max": float64(2),
+		"i_min": float64(1),
+		"j_max": float64(3),
+		"j_min": float64(1),
+		"k_max": float64(200),
+		"k_min": float64(200),
+	}
+	expectedTags := map[string]string{
+		"foo": "bar",
+	}
+	acc.AssertContainsTaggedFields(t, "m1", expectedFields, expectedTags)
+}
+
+// Test two metrics getting added with a push/reset in between (simulates
+// getting added in different periods.)
+func TestMinMaxDifferentPeriods(t *testing.T) {
+	acc := testutil.Accumulator{}
+	minmax := NewMinMax()
+
+	minmax.Add(m1)
+	minmax.Push(&acc)
+	expectedFields := map[string]interface{}{
+		"a_max": float64(1),
+		"a_min": float64(1),
+		"b_max": float64(1),
+		"b_min": float64(1),
+		"c_max": float64(1),
+		"c_min": float64(1),
+		"d_max": float64(1),
+		"d_min": float64(1),
+		"e_max": float64(1),
+		"e_min": float64(1),
+		"f_max": float64(2),
+		"f_min": float64(2),
+		"g_max": float64(2),
+		"g_min": float64(2),
+		"h_max": float64(2),
+		"h_min": float64(2),
+		"i_max": float64(2),
+		"i_min": float64(2),
+		"j_max": float64(3),
+		"j_min": float64(3),
+	}
+	expectedTags := map[string]string{
+		"foo": "bar",
+	}
+	acc.AssertContainsTaggedFields(t, "m1", expectedFields, expectedTags)
+
+	acc.ClearMetrics()
+	minmax.Reset()
+	minmax.Add(m2)
+	minmax.Push(&acc)
+	expectedFields = map[string]interface{}{
+		"a_max": float64(1),
+		"a_min": float64(1),
+		"b_max": float64(3),
+		"b_min": float64(3),
+		"c_max": float64(3),
+		"c_min": float64(3),
+		"d_max": float64(3),
+		"d_min": float64(3),
+		"e_max": float64(3),
+		"e_min": float64(3),
+		"f_max": float64(1),
+		"f_min": float64(1),
+		"g_max": float64(1),
+		"g_min": float64(1),
+		"h_max": float64(1),
+		"h_min": float64(1),
+		"i_max": float64(1),
+		"i_min": float64(1),
+		"j_max": float64(1),
+		"j_min": float64(1),
+		"k_max": float64(200),
+		"k_min": float64(200),
+	}
+	expectedTags = map[string]string{
+		"foo": "bar",
+	}
+	acc.AssertContainsTaggedFields(t, "m1", expectedFields, expectedTags)
+}

plugins/aggregators/registry.go

@@ -0,0 +1,11 @@
+package aggregators
+
+import "github.com/influxdata/telegraf"
+
+type Creator func() telegraf.Aggregator
+
+var Aggregators = map[string]Creator{}
+
+func Add(name string, creator Creator) {
+	Aggregators[name] = creator
+}