add rss feed title

Add tags for the context name and engine ID

.circleci/config.yml

@@ -2,101 +2,214 @@
 defaults:
   defaults: &defaults
     working_directory: '/go/src/github.com/influxdata/telegraf'
-  go-1_8: &go-1_8
+    environment:
+      GOFLAGS: -p=8
+  go-1_13: &go-1_13
     docker:
-      - image: 'circleci/golang:1.8.7'
-  go-1_9: &go-1_9
+      - image: 'quay.io/influxdb/telegraf-ci:1.13.11'
+  go-1_14: &go-1_14
     docker:
-      - image: 'circleci/golang:1.9.5'
-  go-1_10: &go-1_10
-    docker:
-      - image: 'circleci/golang:1.10.1'
+      - image: 'quay.io/influxdb/telegraf-ci:1.14.3'
+  mac: &mac
+    macos:
+      xcode: 11.3.1
+    working_directory: '~/go/src/github.com/influxdata/telegraf'
+    environment:
+      HOMEBREW_NO_AUTO_UPDATE: 1
+      GOFLAGS: -p=8
 
 version: 2
 jobs:
   deps:
-    <<: [ *defaults, *go-1_10 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - checkout
+      - restore_cache:
+          key: go-mod-v1-{{ checksum "go.sum" }}
       - run: 'make deps'
+      - run: 'make tidy'
+      - save_cache:
+          name: 'go module cache'
+          key: go-mod-v1-{{ checksum "go.sum" }}
+          paths:
+            - '/go/pkg/mod'
       - persist_to_workspace:
-          root: '/go/src'
+          root: '/go'
           paths:
             - '*'
-  test-go-1.8:
-    <<: [ *defaults, *go-1_8 ]
+  macdeps:
+    <<: [ *mac ]
+    steps:
+      - checkout
+      - restore_cache:
+          key: mac-go-mod-v1-{{ checksum "go.sum" }}
+      - run: 'brew install go@1.13'
+      - run: 'make deps'
+      - run: 'make tidy'
+      - save_cache:
+          name: 'go module cache'
+          key: mac-go-mod-v1-{{ checksum "go.sum" }}
+          paths:
+            - '~/go/pkg/mod'
+            - '/usr/local/Cellar/go'
+            - '/usr/local/bin/go'
+            - '/usr/local/bin/gofmt'
+      - persist_to_workspace:
+          root: '/'
+          paths:
+            - 'usr/local/bin/go'
+            - 'usr/local/Cellar/go'
+            - 'usr/local/bin/gofmt'
+            - 'Users/distiller/go'
+
+  test-go-1.13:
+    <<: [ *defaults, *go-1_13 ]
     steps:
       - attach_workspace:
-          at: '/go/src'
-      - run: 'make test-ci'
-  test-go-1.9:
-    <<: [ *defaults, *go-1_9 ]
+          at: '/go'
+      - run: 'make'
+      - run: 'make test'
+  test-go-1.13-386:
+    <<: [ *defaults, *go-1_13 ]
     steps:
       - attach_workspace:
-          at: '/go/src'
-      - run: 'make test-ci'
-  test-go-1.10:
-    <<: [ *defaults, *go-1_10 ]
+          at: '/go'
+      - run: 'GOARCH=386 make'
+      - run: 'GOARCH=386 make test'
+  test-go-1.14:
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
-          at: '/go/src'
-      - run: 'make test-ci'
-      - run: 'GOARCH=386 make test-ci'
+          at: '/go'
+      - run: 'make'
+      - run: 'make check'
+      - run: 'make check-deps'
+      - run: 'make test'
+  test-go-1.14-386:
+    <<: [ *defaults, *go-1_14 ]
+    steps:
+      - attach_workspace:
+          at: '/go'
+      - run: 'GOARCH=386 make'
+      - run: 'GOARCH=386 make check'
+      - run: 'GOARCH=386 make test'
+  test-go-1.13-darwin:
+    <<: [ *mac ]
+    steps:
+      - attach_workspace:
+          at: '/'
+      - run: 'make'
+      - run: 'make check'
+      - run: 'make test'
+
+  package:
+    <<: [ *defaults, *go-1_14 ]
+    steps:
+      - attach_workspace:
+          at: '/go'
+      - run: 'make package'
+      - store_artifacts:
+          path: './build'
+          destination: 'build'
   release:
-    <<: [ *defaults, *go-1_10 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
-          at: '/go/src'
-      - run: './scripts/release.sh'
+          at: '/go'
+      - run: 'make package-release'
       - store_artifacts:
-          path: './artifacts'
-          destination: '.'
+          path: './build'
+          destination: 'build'
   nightly:
-    <<: [ *defaults, *go-1_10 ]
+    <<: [ *defaults, *go-1_14 ]
     steps:
       - attach_workspace:
-          at: '/go/src'
-      - run: './scripts/release.sh'
+          at: '/go'
+      - run: 'make package-nightly'
       - store_artifacts:
-          path: './artifacts'
-          destination: '.'
+          path: './build'
+          destination: 'build'
 
 workflows:
   version: 2
-  build_and_release:
+  check:
     jobs:
-      - 'deps'
-      - 'test-go-1.8':
+      - 'macdeps':
+          filters:
+            tags:
+              only: /.*/
+      - 'deps':
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.13':
           requires:
             - 'deps'
-      - 'test-go-1.9':
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.13-386':
           requires:
             - 'deps'
-      - 'test-go-1.10':
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.14':
           requires:
             - 'deps'
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.14-386':
+          requires:
+            - 'deps'
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.13-darwin':
+          requires:
+            - 'macdeps'
+          filters:
+            tags: # only runs on tags if you specify this filter
+              only: /.*/
+      - 'package':
+          requires:
+            - 'test-go-1.13'
+            - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
       - 'release':
           requires:
-            - 'test-go-1.8'
-            - 'test-go-1.9'
-            - 'test-go-1.10'
+            - 'test-go-1.13'
+            - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
+          filters:
+            tags:
+              only: /.*/
+            branches:
+              ignore: /.*/
   nightly:
     jobs:
       - 'deps'
-      - 'test-go-1.8':
+      - 'test-go-1.13':
           requires:
             - 'deps'
-      - 'test-go-1.9':
+      - 'test-go-1.13-386':
           requires:
             - 'deps'
-      - 'test-go-1.10':
+      - 'test-go-1.14':
+          requires:
+            - 'deps'
+      - 'test-go-1.14-386':
           requires:
             - 'deps'
       - 'nightly':
           requires:
-            - 'test-go-1.8'
-            - 'test-go-1.9'
-            - 'test-go-1.10'
+            - 'test-go-1.13'
+            - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
     triggers:
       - schedule:
           cron: "0 7 * * *"

.gitattributes

@@ -1,4 +1,5 @@
 CHANGELOG.md merge=union
 README.md merge=union
+go.sum merge=union
 plugins/inputs/all/all.go merge=union
 plugins/outputs/all/all.go merge=union

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -1,24 +1,45 @@
----
-name: Bug report
-about: Create a report to help us improve
-
----
-
-### 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.]
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+<!--
+Please redirect any questions about Telegraf usage to the InfluxData Community
+site: https://community.influxdata.com
+
+Check the documentation for the related plugin including the troubleshooting
+section if available.
+-->
+
+### Relevant telegraf.conf:
+<!-- Place config in the toml code section. -->
+```toml
+
+```
+
+### System info:
+
+<!-- Include Telegraf version, operating system, and other relevant details -->
+
+### Docker
+
+<!-- If your bug involves third party dependencies or services, it can be very helpful to provide a Dockerfile or docker-compose.yml that reproduces the environment you're testing against -->
+
+### Steps to reproduce:
+
+<!-- Describe the steps to reproduce the bug. -->
+
+1. ...
+2. ...
+
+### Expected behavior:
+
+<!-- Describe what you expected to happen when you performed the above steps. -->
+
+### Actual behavior:
+
+<!-- Describe what actually happened when you performed the above steps. -->
+
+### Additional info:
+
+<!-- Include gist of relevant config, logs, etc. -->

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -1,17 +1,17 @@
----
-name: Feature request
-about: Suggest an idea for this project
-
----
-
-## 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)]
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+## 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)] -->

.gitignore

@@ -2,3 +2,4 @@
 /telegraf
 /telegraf.exe
 /telegraf.gz
+/vendor

CONTRIBUTING.md

@@ -1,484 +1,62 @@
-## Steps for Contributing:
+### 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).
+1. [Sign the CLA][cla].
+1. Open a [new issue][] to discuss the changes you would like to make.  This is
+   not strictly required but it may help reduce the amount of rework you need
+   to do later.
+1. Make changes or write plugin using the guidelines in the following
+   documents:
+   - [Input Plugins][inputs]
+   - [Processor Plugins][processors]
+   - [Aggregator Plugins][aggregators]
+   - [Output Plugins][outputs]
+1. Ensure you have added proper unit tests and documentation.
+1. Open a new [pull request][].
 
-## GoDoc
+#### Contributing an External Plugin *(experimental)*
+Input plugins written for internal Telegraf can be run as externally-compiled plugins through the [Execd Input Plugin](https://github.com/influxdata/telegraf/tree/master/plugins/inputs/execd) without having to change the plugin code.
+
+Follow the guidelines of how to integrate your plugin with the [Execd Go Shim](https://github.com/influxdata/telegraf/tree/master/plugins/inputs/execd/shim) to easily compile it as a separate app and run it from the inputs.execd plugin. 
+
+#### Security Vulnerability Reporting
+InfluxData takes security and our users' trust very seriously. If you believe you have found a security issue in any of our
+open source projects, please responsibly disclose it by contacting security@influxdata.com. More details about 
+security vulnerability reporting, 
+including our GPG key, [can be found here](https://www.influxdata.com/how-to-report-security-vulnerabilities/).
+
+### GoDoc
 
 Public interfaces for inputs, outputs, processors, aggregators, metrics,
-and the accumulator can be found on the GoDoc
+and the accumulator can be found in the GoDoc:
 
 [![GoDoc](https://godoc.org/github.com/influxdata/telegraf?status.svg)](https://godoc.org/github.com/influxdata/telegraf)
 
-## Sign the CLA
+### Common development tasks
 
-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)
+**Adding a dependency:**
 
-## Adding a dependency
+Telegraf uses Go modules. Assuming you can already build the project, run this in the telegraf directory:
 
-Assuming you can already build the project, run these in the telegraf directory:
+1. `go get github.com/[dependency]/[new-package]`
 
-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 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 inputs.
-
-### Input Plugin Guidelines
-
-* 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.
-* 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 config`.
-* The `Description` function should say in one line what this plugin does.
-
-Let's say you've written a plugin that emits metrics about processes on the
-current host.
-
-### Input Plugin Example
-
-```go
-package simple
-
-// simple.go
-
-import (
-    "github.com/influxdata/telegraf"
-    "github.com/influxdata/telegraf/plugins/inputs"
-)
-
-type Simple struct {
-    Ok bool
-}
-
-func (s *Simple) Description() string {
-    return "a demo plugin"
-}
-
-func (s *Simple) SampleConfig() string {
-    return `
-  ## Indicate if everything is fine
-  ok = true
-`
-}
-
-func (s *Simple) Gather(acc telegraf.Accumulator) error {
-    if s.Ok {
-        acc.AddFields("state", map[string]interface{}{"value": "pretty good"}, nil)
-    } else {
-        acc.AddFields("state", map[string]interface{}{"value": "not great"}, nil)
-    }
-
-    return nil
-}
-
-func init() {
-    inputs.Add("simple", func() telegraf.Input { return &Simple{} })
-}
-```
-
-## 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 its 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
-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 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()`
-and `Stop()` methods.
-
-### Service Plugin Guidelines
-
-* Same as the `Plugin` guidelines, except that they must conform to the
-[`telegraf.ServiceInput`](https://godoc.org/github.com/influxdata/telegraf#ServiceInput) interface.
-
-## 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 Plugin Guidelines
-
-* 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/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 config`.
-* The `Description` function should say in one line what this output does.
-
-### Output Example
-
-```go
-package simpleoutput
-
-// simpleoutput.go
-
-import (
-    "github.com/influxdata/telegraf"
-    "github.com/influxdata/telegraf/plugins/outputs"
-)
-
-type Simple struct {
-    Ok bool
-}
-
-func (s *Simple) Description() string {
-    return "a demo output"
-}
-
-func (s *Simple) SampleConfig() string {
-    return `
-  ok = true
-`
-}
-
-func (s *Simple) Connect() error {
-    // Make a connection to the URL here
-    return nil
-}
-
-func (s *Simple) Close() error {
-    // Close connection to the URL here
-    return nil
-}
-
-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() telegraf.Output { return &Simple{} })
-}
-
-```
-
-## 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 its 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
-while Telegraf is running. One example would be the `prometheus_client` output,
-which operates an HTTP server.
-
-Their interface is quite similar to a regular output, with the addition of `Start()`
-and `Stop()` methods.
-
-### Service Output Guidelines
-
-* Same as the `Output` guidelines, except that they must conform to the
-`output.ServiceOutput` 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 the output of `telegraf config`.
-* The `Description` function should say in one line what this processor does.
-
-### Processor Example
-
-```go
-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 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()
-	})
-}
-```
-
-## Unit Tests
+**Unit Tests:**
 
 Before opening a pull request you should run the linter checks and
 the short tests.
 
-### Execute linter
+```
+make check
+make test
+```
 
-execute `make lint`
+**Execute integration tests:**
 
-### Execute short tests
-
-execute `make test`
-
-### Execute integration tests
+(Optional)
 
 Running the integration tests requires several docker containers to be
 running.  You can start the containers with:
 ```
-make docker-run
+docker-compose up
 ```
 
 And run the full test suite with:
@@ -487,3 +65,12 @@ make test-all
 ```
 
 Use `make docker-kill` to stop the containers.
+
+
+[cla]: https://www.influxdata.com/legal/cla/
+[new issue]: https://github.com/influxdata/telegraf/issues/new/choose
+[pull request]: https://github.com/influxdata/telegraf/compare
+[inputs]: /docs/INPUTS.md
+[processors]: /docs/PROCESSORS.md
+[aggregators]: /docs/AGGREGATORS.md
+[outputs]: /docs/OUTPUTS.md

Dockerfile

@@ -0,0 +1,16 @@
+# Copy of scripts/stretch.docker
+FROM golang:1.13.8 as builder
+WORKDIR /go/src/github.com/influxdata/telegraf
+
+COPY . /go/src/github.com/influxdata/telegraf
+RUN make go-install
+
+FROM buildpack-deps:stretch-curl
+COPY --from=builder /go/bin/* /usr/bin/
+COPY etc/telegraf.conf /etc/telegraf/telegraf.conf
+
+EXPOSE 8125/udp 8092/udp 8094
+
+COPY scripts/docker-entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["telegraf"]

EXTERNAL_PLUGINS.md

@@ -0,0 +1,9 @@
+# External Plugins
+
+This is a list of plugins that can be compiled outside of Telegraf and used via the execd input.
+
+Pull requests welcome.
+
+## Inputs
+- [rand](https://github.com/ssoroka/rand) - Generate random numbers
+- [twitter](https://github.com/inabagumi/twitter-telegraf-plugin) - Gather account information from Twitter accounts

Godeps

@@ -1,101 +0,0 @@
-code.cloudfoundry.org/clock e9dc86bbf0e5bbe6bf7ff5a6f71e048959b61f71
-collectd.org 2ce144541b8903101fb8f1483cc0497a68798122
-github.com/aerospike/aerospike-client-go 95e1ad7791bdbca44707fedbb29be42024900d9c
-github.com/amir/raidman c74861fe6a7bb8ede0a010ce4485bdbb4fc4c985
-github.com/apache/thrift 4aaa92ece8503a6da9bc6701604f69acf2b99d07
-github.com/aws/aws-sdk-go c861d27d0304a79f727e9a8a4e2ac1e74602fdc0
-github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
-github.com/bsm/sarama-cluster abf039439f66c1ce78017f560b490612552f6472
-github.com/cenkalti/backoff b02f2bbce11d7ea6b97f282ef1771b0fe2f65ef3
-github.com/couchbase/go-couchbase bfe555a140d53dc1adf390f1a1d4b0fd4ceadb28
-github.com/couchbase/gomemcached 4a25d2f4e1dea9ea7dd76dfd943407abf9b07d29
-github.com/couchbase/goutils 5823a0cbaaa9008406021dc5daf80125ea30bba6
-github.com/davecgh/go-spew 346938d642f2ec3594ed81d874461961cd0faa76
-github.com/dgrijalva/jwt-go dbeaa9332f19a944acb5736b4456cfcc02140e29
-github.com/docker/docker f5ec1e2936dcbe7b5001c2b817188b095c700c27
-github.com/docker/go-connections 990a1a1a70b0da4c4cb70e117971a4f0babfbf1a
-github.com/eapache/go-resiliency b86b1ec0dd4209a588dc1285cdd471e73525c0b3
-github.com/eapache/go-xerial-snappy bb955e01b9346ac19dc29eb16586c90ded99a98c
-github.com/eapache/queue 44cc805cf13205b55f69e14bcb69867d1ae92f98
-github.com/eclipse/paho.mqtt.golang aff15770515e3c57fc6109da73d42b0d46f7f483
-github.com/go-logfmt/logfmt 390ab7935ee28ec6b286364bba9b4dd6410cb3d5
-github.com/go-sql-driver/mysql 2e00b5cd70399450106cec6431c2e2ce3cae5034
-github.com/gobwas/glob bea32b9cd2d6f55753d94a28e959b13f0244797a
-github.com/go-ini/ini 9144852efba7c4daf409943ee90767da62d55438
-github.com/gogo/protobuf 7b6c6391c4ff245962047fc1e2c6e08b1cdfa0e8
-github.com/golang/protobuf 8ee79997227bf9b34611aee7946ae64735e6fd93
-github.com/golang/snappy 7db9049039a047d955fe8c19b83c8ff5abd765c7
-github.com/go-ole/go-ole be49f7c07711fcb603cff39e1de7c67926dc0ba7
-github.com/google/go-cmp f94e52cad91c65a63acc1e75d4be223ea22e99bc
-github.com/gorilla/mux 53c1911da2b537f792e7cafcb446b05ffe33b996
-github.com/go-redis/redis 73b70592cdaa9e6abdfcfbf97b4a90d80728c836
-github.com/go-sql-driver/mysql 2e00b5cd70399450106cec6431c2e2ce3cae5034
-github.com/hailocab/go-hostpool e80d13ce29ede4452c43dea11e79b9bc8a15b478
-github.com/hashicorp/consul 5174058f0d2bda63fa5198ab96c33d9a909c58ed
-github.com/influxdata/go-syslog 84f3b60009444d298f97454feb1f20cf91d1fa6e
-github.com/influxdata/tail c43482518d410361b6c383d7aebce33d0471d7bc
-github.com/influxdata/toml 5d1d907f22ead1cd47adde17ceec5bda9cacaf8f
-github.com/influxdata/wlog 7c63b0a71ef8300adc255344d275e10e5c3a71ec
-github.com/fsnotify/fsnotify c2828203cd70a50dcccfb2761f8b1f8ceef9a8e9
-github.com/jackc/pgx 63f58fd32edb5684b9e9f4cfaac847c6b42b3917
-github.com/jmespath/go-jmespath bd40a432e4c76585ef6b72d3fd96fb9b6dc7b68d
-github.com/kardianos/osext c2c54e542fb797ad986b31721e1baedf214ca413
-github.com/kardianos/service 6d3a0ee7d3425d9d835debc51a0ca1ffa28f4893
-github.com/kballard/go-shellquote d8ec1a69a250a17bb0e419c386eac1f3711dc142
-github.com/matttproud/golang_protobuf_extensions c12348ce28de40eed0136aa2b644d0ee0650e56c
-github.com/Microsoft/ApplicationInsights-Go 3612f58550c1de70f1a110c78c830e55f29aa65d
-github.com/Microsoft/go-winio ce2922f643c8fd76b46cadc7f404a06282678b34
-github.com/miekg/dns 99f84ae56e75126dd77e5de4fae2ea034a468ca1
-github.com/mitchellh/mapstructure d0303fe809921458f417bcf828397a65db30a7e4
-github.com/multiplay/go-ts3 07477f49b8dfa3ada231afc7b7b17617d42afe8e
-github.com/naoina/go-stringutil 6b638e95a32d0c1131db0e7fe83775cbea4a0d0b
-github.com/nats-io/gnatsd 393bbb7c031433e68707c8810fda0bfcfbe6ab9b
-github.com/nats-io/go-nats ea9585611a4ab58a205b9b125ebd74c389a6b898
-github.com/nats-io/nats ea9585611a4ab58a205b9b125ebd74c389a6b898
-github.com/nats-io/nuid 289cccf02c178dc782430d534e3c1f5b72af807f
-github.com/nsqio/go-nsq eee57a3ac4174c55924125bb15eeeda8cffb6e6f
-github.com/opencontainers/runc 89ab7f2ccc1e45ddf6485eaa802c35dcf321dfc8
-github.com/opentracing-contrib/go-observer a52f2342449246d5bcc273e65cbdcfa5f7d6c63c
-github.com/opentracing/opentracing-go 06f47b42c792fef2796e9681353e1d908c417827
-github.com/openzipkin/zipkin-go-opentracing 1cafbdfde94fbf2b373534764e0863aa3bd0bf7b
-github.com/pierrec/lz4 5c9560bfa9ace2bf86080bf40d46b34ae44604df
-github.com/pierrec/xxHash 5a004441f897722c627870a981d02b29924215fa
-github.com/pkg/errors 645ef00459ed84a119197bfb8d8205042c6df63d
-github.com/pmezard/go-difflib/difflib 792786c7400a136282c1664665ae0a8db921c6c2
-github.com/prometheus/client_golang c317fb74746eac4fc65fe3909195f4cf67c5562a
-github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6
-github.com/prometheus/common dd2f054febf4a6c00f2343686efb775948a8bff4
-github.com/prometheus/procfs 1878d9fbb537119d24b21ca07effd591627cd160
-github.com/rcrowley/go-metrics 1f30fe9094a513ce4c700b9a54458bbb0c96996c
-github.com/samuel/go-zookeeper 1d7be4effb13d2d908342d349d71a284a7542693
-github.com/satori/go.uuid 5bf94b69c6b68ee1b541973bb8e1144db23a194b
-github.com/shirou/gopsutil c95755e4bcd7a62bb8bd33f3a597a7c7f35e2cf3
-github.com/shirou/w32 3c9377fc6748f222729a8270fe2775d149a249ad
-github.com/Shopify/sarama 3b1b38866a79f06deddf0487d5c27ba0697ccd65
-github.com/Sirupsen/logrus 61e43dc76f7ee59a82bdf3d71033dc12bea4c77d
-github.com/soniah/gosnmp f15472a4cd6f6ea7929e4c7d9f163c49f059924f
-github.com/StackExchange/wmi f3e2bae1e0cb5aef83e319133eabfee30013a4a5
-github.com/streadway/amqp 63795daa9a446c920826655f26ba31c81c860fd6
-github.com/stretchr/objx facf9a85c22f48d2f52f2380e4efce1768749a89
-github.com/stretchr/testify 12b6f73e6084dad08a7c6e575284b177ecafbc71
-github.com/tidwall/gjson 0623bd8fbdbf97cc62b98d15108832851a658e59
-github.com/tidwall/match 173748da739a410c5b0b813b956f89ff94730b4c
-github.com/vjeantet/grok d73e972b60935c7fec0b4ffbc904ed39ecaf7efe
-github.com/wvanbergen/kafka bc265fedb9ff5b5c5d3c0fdcef4a819b3523d3ee
-github.com/wvanbergen/kazoo-go 968957352185472eacb69215fa3dbfcfdbac1096
-github.com/yuin/gopher-lua 66c871e454fcf10251c61bf8eff02d0978cae75a
-github.com/zensqlmonitor/go-mssqldb ffe5510c6fa5e15e6d983210ab501c815b56b363
-golang.org/x/crypto dc137beb6cce2043eb6b5f223ab8bf51c32459f4
-golang.org/x/net a337091b0525af65de94df2eb7e98bd9962dcbe2
-golang.org/x/sys 739734461d1c916b6c72a63d7efda2b27edb369f
-golang.org/x/text 506f9d5c962f284575e88337e7d9296d27e729d3
-google.golang.org/genproto 11c7f9e547da6db876260ce49ea7536985904c9b
-google.golang.org/grpc de2209a968d48e8970546c8a710189f7461370f7
-gopkg.in/asn1-ber.v1 4e86f4367175e39f69d9358a5f17b4dda270378d
-gopkg.in/fatih/pool.v2 6e328e67893eb46323ad06f0e92cb9536babbabc
-gopkg.in/gorethink/gorethink.v3 7ab832f7b65573104a555d84a27992ae9ea1f659
-gopkg.in/ldap.v2 8168ee085ee43257585e50c6441aadf54ecb2c9f
-gopkg.in/mgo.v2 3f83fa5005286a7fe593b055f0d7771a7dce4655
-gopkg.in/olivere/elastic.v5 3113f9b9ad37509fe5f8a0e5e91c96fdc4435e26
-gopkg.in/tomb.v1 dd632973f1e7218eb1089048e0798ec9ae7dceb8
-gopkg.in/yaml.v2 4c78c975fe7c825c6d1466c42be594d1d6f3aba6

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 InfluxDB
+Copyright (c) 2015-2019 InfluxData Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -1,15 +1,23 @@
+ifeq ($(OS), Windows_NT)
+	VERSION := $(shell git describe --exact-match --tags 2>nul)
+	HOME := $(HOMEPATH)
+	CGO_ENABLED ?= 0
+	export CGO_ENABLED
+else
+	VERSION := $(shell git describe --exact-match --tags 2>/dev/null)
+endif
+
 PREFIX := /usr/local
-VERSION := $(shell git describe --exact-match --tags 2>/dev/null)
 BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
 COMMIT := $(shell git rev-parse --short HEAD)
 GOFILES ?= $(shell git ls-files '*.go')
-GOFMT ?= $(shell gofmt -l $(filter-out plugins/parsers/influx/machine.go, $(GOFILES)))
+GOFMT ?= $(shell gofmt -l -s $(filter-out plugins/parsers/influx/machine.go, $(GOFILES)))
 BUILDFLAGS ?=
 
 ifdef GOBIN
 PATH := $(GOBIN):$(PATH)
 else
-PATH := $(subst :,/bin:,$(GOPATH))/bin:$(PATH)
+PATH := $(subst :,/bin:,$(shell go env GOPATH))/bin:$(PATH)
 endif
 
 LDFLAGS := $(LDFLAGS) -X main.commit=$(COMMIT) -X main.branch=$(BRANCH)
@@ -17,33 +25,38 @@ ifdef VERSION
 	LDFLAGS += -X main.version=$(VERSION)
 endif
 
+.PHONY: all
 all:
-	$(MAKE) deps
-	$(MAKE) telegraf
+	@$(MAKE) --no-print-directory deps
+	@$(MAKE) --no-print-directory telegraf
 
+.PHONY: deps
 deps:
-	go get -u github.com/golang/lint/golint
-	go get github.com/sparrc/gdm
-	gdm restore --parallel=false
+	go mod download
 
+.PHONY: telegraf
 telegraf:
 	go build -ldflags "$(LDFLAGS)" ./cmd/telegraf
 
+.PHONY: go-install
 go-install:
 	go install -ldflags "-w -s $(LDFLAGS)" ./cmd/telegraf
 
+.PHONY: install
 install: telegraf
 	mkdir -p $(DESTDIR)$(PREFIX)/bin/
-	cp $(TELEGRAF) $(DESTDIR)$(PREFIX)/bin/
+	cp telegraf $(DESTDIR)$(PREFIX)/bin/
 
+.PHONY: test
 test:
 	go test -short ./...
 
+.PHONY: fmt
 fmt:
-	@gofmt -w $(filter-out plugins/parsers/influx/machine.go, $(GOFILES))
+	@gofmt -s -w $(filter-out plugins/parsers/influx/machine.go, $(GOFILES))
 
+.PHONY: fmtcheck
 fmtcheck:
-	@echo '[INFO] running gofmt to identify incorrectly formatted code...'
 	@if [ ! -z "$(GOFMT)" ]; then \
 		echo "[ERROR] gofmt has found errors in the following files:"  ; \
 		echo "$(GOFMT)" ; \
@@ -51,17 +64,17 @@ fmtcheck:
 		echo "Run make fmt to fix them." ; \
 		exit 1 ;\
 	fi
-	@echo '[INFO] done.'
 
+.PHONY: test-windows
 test-windows:
-	go test ./plugins/inputs/ping/...
-	go test ./plugins/inputs/win_perf_counters/...
-	go test ./plugins/inputs/win_services/...
-	go test ./plugins/inputs/procstat/...
-	go test ./plugins/inputs/ntpq/...
+	go test -short ./plugins/inputs/ping/...
+	go test -short ./plugins/inputs/win_perf_counters/...
+	go test -short ./plugins/inputs/win_services/...
+	go test -short ./plugins/inputs/procstat/...
+	go test -short ./plugins/inputs/ntpq/...
+	go test -short ./plugins/processors/port_name/...
 
-# vet runs the Go source code static analysis tool `vet` to find
-# any common errors.
+.PHONY: vet
 vet:
 	@echo 'go vet $$(go list ./... | grep -v ./plugins/parsers/influx)'
 	@go vet $$(go list ./... | grep -v ./plugins/parsers/influx) ; if [ $$? -ne 0 ]; then \
@@ -71,25 +84,72 @@ vet:
 		exit 1; \
 	fi
 
-test-ci: fmtcheck vet
-	go test -short ./...
+.PHONY: tidy
+tidy:
+	go mod verify
+	go mod tidy
+	@if ! git diff --quiet go.mod go.sum; then \
+		echo "please run go mod tidy and check in changes"; \
+		exit 1; \
+	fi
 
+.PHONY: check
+check: fmtcheck vet
+	@$(MAKE) --no-print-directory tidy
+
+.PHONY: test-all
 test-all: fmtcheck vet
 	go test ./...
 
+.PHONY: check-deps
+check-deps:
+	./scripts/check-deps.sh
+
+.PHONY: package
 package:
 	./scripts/build.py --package --platform=all --arch=all
 
+.PHONY: package-release
+package-release:
+	./scripts/build.py --release --package --platform=all --arch=all \
+		--upload --bucket=dl.influxdata.com/telegraf/releases
+
+.PHONY: package-nightly
+package-nightly:
+	./scripts/build.py --nightly --package --platform=all --arch=all \
+		--upload --bucket=dl.influxdata.com/telegraf/nightlies
+
+.PHONY: clean
 clean:
 	rm -f telegraf
 	rm -f telegraf.exe
 
+.PHONY: docker-image
 docker-image:
-	./scripts/build.py --package --platform=linux --arch=amd64
-	cp build/telegraf*$(COMMIT)*.deb .
-	docker build -f scripts/dev.docker --build-arg "package=telegraf*$(COMMIT)*.deb" -t "telegraf-dev:$(COMMIT)" .
+	docker build -f scripts/stretch.docker -t "telegraf:$(COMMIT)" .
 
 plugins/parsers/influx/machine.go: plugins/parsers/influx/machine.go.rl
 	ragel -Z -G2 $^ -o $@
 
-.PHONY: deps telegraf install test test-windows lint vet test-all package clean docker-image fmtcheck uint64
+.PHONY: static
+static:
+	@echo "Building static linux binary..."
+	@CGO_ENABLED=0 \
+	GOOS=linux \
+	GOARCH=amd64 \
+	go build -ldflags "$(LDFLAGS)" ./cmd/telegraf
+
+.PHONY: plugin-%
+plugin-%:
+	@echo "Starting dev environment for $${$(@)} input plugin..."
+	@docker-compose -f plugins/inputs/$${$(@)}/dev/docker-compose.yml up
+
+.PHONY: ci-1.13
+ci-1.13:
+	docker build -t quay.io/influxdb/telegraf-ci:1.13.8 - < scripts/ci-1.13.docker
+	docker push quay.io/influxdb/telegraf-ci:1.13.8
+
+.PHONY: ci-1.12
+ci-1.12:
+	docker build -t quay.io/influxdb/telegraf-ci:1.12.17 - < scripts/ci-1.12.docker
+	docker push quay.io/influxdb/telegraf-ci:1.12.17

README.md

@@ -1,24 +1,24 @@
 # 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, processing, aggregating,
-and writing metrics.
+Telegraf is an agent 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
-.  For an example configuration referencet from local or remote services.
+that developers in the community can easily add support for collecting
+metrics.
 
-Telegraf is plugin-driven and has the concept of 4 distinct plugins:
+Telegraf is plugin-driven and has the concept of 4 distinct plugin types:
 
 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, pull requests are welcomed
+and we work to incorporate as many pull requests as possible.
 
-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.
+## Try in Browser :rocket:
+
+You can try Telegraf right in your browser in the [Telegraf playground](https://rootnroll.com/d/telegraf/).
 
 ## Contributing
 
@@ -26,8 +26,19 @@ There are many ways to contribute:
 - Fix and [report bugs](https://github.com/influxdata/telegraf/issues/new)
 - [Improve documentation](https://github.com/influxdata/telegraf/issues?q=is%3Aopen+label%3Adocumentation)
 - [Review code and feature proposals](https://github.com/influxdata/telegraf/pulls)
-- Answer questions on github and on the [Community Site](https://community.influxdata.com/)
+- Answer questions and discuss here on github and on the [Community Site](https://community.influxdata.com/)
 - [Contribute plugins](CONTRIBUTING.md)
+- [Contribute external plugins](https://github.com/influxdata/telegraf/tree/master/plugins/inputs/execd/shim) *(experimental)*
+
+## Minimum Requirements
+
+Telegraf shares the same [minimum requirements][] as Go:
+- Linux kernel version 2.6.23 or later
+- Windows 7 or later
+- FreeBSD 11.2 or later
+- MacOS 10.11 El Capitan or later
+
+[minimum requirements]: https://github.com/golang/go/wiki/MinimumRequirements#minimum-requirements
 
 ## Installation:
 
@@ -40,20 +51,29 @@ Ansible role: https://github.com/rossmcdonald/telegraf
 
 ### From Source:
 
-Telegraf requires golang version 1.8+, the Makefile requires GNU make.
+Telegraf requires Go version 1.13 or newer, the Makefile requires GNU make.
 
-Dependencies are managed with [gdm](https://github.com/sparrc/gdm),
-which is installed by the Makefile if you don't have it already.
+1. [Install Go](https://golang.org/doc/install) >=1.13 (1.14 recommended)
+2. Clone the Telegraf repository:
+   ```
+   cd ~/src
+   git clone https://github.com/influxdata/telegraf.git
+   ```
+3. Run `make` from the source directory
+   ```
+   cd ~/src/telegraf
+   make
+   ```
 
-1. [Install Go](https://golang.org/doc/install)
-2. [Setup your GOPATH](https://golang.org/doc/code.html#GOPATH)
-3. Run `go get -d github.com/influxdata/telegraf`
-4. Run `cd $GOPATH/src/github.com/influxdata/telegraf`
-5. Run `make`
+### Changelog
+
+View the [changelog](/CHANGELOG.md) for the latest updates and changes by
+version.
 
 ### Nightly Builds
 
 These builds are generated from the master branch:
+- [telegraf-nightly_darwin_amd64.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_darwin_amd64.tar.gz)
 - [telegraf_nightly_amd64.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_amd64.deb)
 - [telegraf_nightly_arm64.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_arm64.deb)
 - [telegraf-nightly.arm64.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.arm64.rpm)
@@ -83,112 +103,171 @@ These builds are generated from the master branch:
 See usage with:
 
 ```
-./telegraf --help
+telegraf --help
 ```
 
 #### Generate a telegraf config file:
 
 ```
-./telegraf config > telegraf.conf
+telegraf config > telegraf.conf
 ```
 
 #### Generate config with only cpu input & influxdb output plugins defined:
 
 ```
-./telegraf --input-filter cpu --output-filter influxdb config
+telegraf --section-filter agent:inputs:outputs --input-filter cpu --output-filter influxdb config
 ```
 
-#### Run a single telegraf collection, outputing metrics to stdout:
+#### Run a single telegraf collection, outputting metrics to stdout:
 
 ```
-./telegraf --config telegraf.conf --test
+telegraf --config telegraf.conf --test
 ```
 
 #### Run telegraf with all plugins defined in config file:
 
 ```
-./telegraf --config telegraf.conf
+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
+telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
 ```
 
+## Documentation
 
-## Configuration
+[Latest Release Documentation][release docs].
 
-See the [configuration guide](docs/CONFIGURATION.md) for a rundown of the more advanced
-configuration options.
+For documentation on the latest development code see the [documentation index][devel docs].
+
+[release docs]: https://docs.influxdata.com/telegraf
+[devel docs]: docs
 
 ## Input Plugins
 
+* [activemq](./plugins/inputs/activemq)
 * [aerospike](./plugins/inputs/aerospike)
 * [amqp_consumer](./plugins/inputs/amqp_consumer) (rabbitmq)
 * [apache](./plugins/inputs/apache)
+* [apcupsd](./plugins/inputs/apcupsd)
 * [aurora](./plugins/inputs/aurora)
-* [aws cloudwatch](./plugins/inputs/cloudwatch)
+* [aws cloudwatch](./plugins/inputs/cloudwatch) (Amazon Cloudwatch)
+* [azure_storage_queue](./plugins/inputs/azure_storage_queue)
 * [bcache](./plugins/inputs/bcache)
+* [beanstalkd](./plugins/inputs/beanstalkd)
+* [bind](./plugins/inputs/bind)
 * [bond](./plugins/inputs/bond)
-* [cassandra](./plugins/inputs/cassandra) (deprecated, use [jolokia2](./plugins/inputs/jolokia2))
 * [burrow](./plugins/inputs/burrow)
+* [cassandra](./plugins/inputs/cassandra) (deprecated, use [jolokia2](./plugins/inputs/jolokia2))
 * [ceph](./plugins/inputs/ceph)
 * [cgroup](./plugins/inputs/cgroup)
 * [chrony](./plugins/inputs/chrony)
-* [consul](./plugins/inputs/consul)
+* [cisco_telemetry_gnmi](./plugins/inputs/cisco_telemetry_gnmi)
+* [cisco_telemetry_mdt](./plugins/inputs/cisco_telemetry_mdt)
+* [clickhouse](./plugins/inputs/clickhouse)
+* [cloud_pubsub](./plugins/inputs/cloud_pubsub) Google Cloud Pub/Sub
+* [cloud_pubsub_push](./plugins/inputs/cloud_pubsub_push) Google Cloud Pub/Sub push endpoint
 * [conntrack](./plugins/inputs/conntrack)
+* [consul](./plugins/inputs/consul)
 * [couchbase](./plugins/inputs/couchbase)
 * [couchdb](./plugins/inputs/couchdb)
+* [cpu](./plugins/inputs/cpu)
 * [DC/OS](./plugins/inputs/dcos)
+* [diskio](./plugins/inputs/diskio)
+* [disk](./plugins/inputs/disk)
 * [disque](./plugins/inputs/disque)
 * [dmcache](./plugins/inputs/dmcache)
 * [dns query time](./plugins/inputs/dns_query)
 * [docker](./plugins/inputs/docker)
+* [docker_log](./plugins/inputs/docker_log)
 * [dovecot](./plugins/inputs/dovecot)
+* [aws ecs](./plugins/inputs/ecs) (Amazon Elastic Container Service, Fargate)
 * [elasticsearch](./plugins/inputs/elasticsearch)
+* [ethtool](./plugins/inputs/ethtool)
+* [eventhub_consumer](./plugins/inputs/eventhub_consumer) (Azure Event Hubs \& Azure IoT Hub)
 * [exec](./plugins/inputs/exec) (generic executable plugin, support JSON, influx, graphite and nagios)
+* [execd](./plugins/inputs/execd)
 * [fail2ban](./plugins/inputs/fail2ban)
 * [fibaro](./plugins/inputs/fibaro)
+* [file](./plugins/inputs/file)
 * [filestat](./plugins/inputs/filestat)
+* [filecount](./plugins/inputs/filecount)
+* [fireboard](/plugins/inputs/fireboard)
 * [fluentd](./plugins/inputs/fluentd)
+* [github](./plugins/inputs/github)
 * [graylog](./plugins/inputs/graylog)
 * [haproxy](./plugins/inputs/haproxy)
 * [hddtemp](./plugins/inputs/hddtemp)
+* [httpjson](./plugins/inputs/httpjson) (generic JSON-emitting http service plugin)
+* [http_listener](./plugins/inputs/influxdb_listener) (deprecated, renamed to [influxdb_listener](/plugins/inputs/influxdb_listener))
+* [http_listener_v2](./plugins/inputs/http_listener_v2)
 * [http](./plugins/inputs/http) (generic HTTP plugin, supports using input data formats)
 * [http_response](./plugins/inputs/http_response)
-* [httpjson](./plugins/inputs/httpjson) (generic JSON-emitting http service plugin)
-* [internal](./plugins/inputs/internal)
+* [icinga2](./plugins/inputs/icinga2)
+* [infiniband](./plugins/inputs/infiniband)
 * [influxdb](./plugins/inputs/influxdb)
+* [influxdb_listener](./plugins/inputs/influxdb_listener)
+* [internal](./plugins/inputs/internal)
 * [interrupts](./plugins/inputs/interrupts)
 * [ipmi_sensor](./plugins/inputs/ipmi_sensor)
-* [iptables](./plugins/inputs/iptables)
 * [ipset](./plugins/inputs/ipset)
-* [jolokia](./plugins/inputs/jolokia) (deprecated, use [jolokia2](./plugins/inputs/jolokia2))
+* [iptables](./plugins/inputs/iptables)
+* [ipvs](./plugins/inputs/ipvs)
+* [jenkins](./plugins/inputs/jenkins)
 * [jolokia2](./plugins/inputs/jolokia2) (java, cassandra, kafka)
-- [jti_openconfig_telemetry](./plugins/inputs/jti_openconfig_telemetry)
+* [jolokia](./plugins/inputs/jolokia) (deprecated, use [jolokia2](./plugins/inputs/jolokia2))
+* [jti_openconfig_telemetry](./plugins/inputs/jti_openconfig_telemetry)
+* [kafka_consumer](./plugins/inputs/kafka_consumer)
 * [kapacitor](./plugins/inputs/kapacitor)
+* [aws kinesis](./plugins/inputs/kinesis_consumer) (Amazon Kinesis)
+* [kernel](./plugins/inputs/kernel)
+* [kernel_vmstat](./plugins/inputs/kernel_vmstat)
+* [kibana](./plugins/inputs/kibana)
 * [kubernetes](./plugins/inputs/kubernetes)
+* [kube_inventory](./plugins/inputs/kube_inventory)
+* [lanz](./plugins/inputs/lanz)
 * [leofs](./plugins/inputs/leofs)
+* [linux_sysctl_fs](./plugins/inputs/linux_sysctl_fs)
+* [logparser](./plugins/inputs/logparser) (deprecated, use [tail](/plugins/inputs/tail))
+* [logstash](./plugins/inputs/logstash)
 * [lustre2](./plugins/inputs/lustre2)
 * [mailchimp](./plugins/inputs/mailchimp)
+* [marklogic](./plugins/inputs/marklogic)
 * [mcrouter](./plugins/inputs/mcrouter)
 * [memcached](./plugins/inputs/memcached)
+* [mem](./plugins/inputs/mem)
 * [mesos](./plugins/inputs/mesos)
 * [minecraft](./plugins/inputs/minecraft)
+* [modbus](./plugins/inputs/modbus)
 * [mongodb](./plugins/inputs/mongodb)
+* [monit](./plugins/inputs/monit)
+* [mqtt_consumer](./plugins/inputs/mqtt_consumer)
+* [multifile](./plugins/inputs/multifile)
 * [mysql](./plugins/inputs/mysql)
+* [nats_consumer](./plugins/inputs/nats_consumer)
 * [nats](./plugins/inputs/nats)
+* [neptune_apex](./plugins/inputs/neptune_apex)
+* [net](./plugins/inputs/net)
 * [net_response](./plugins/inputs/net_response)
+* [netstat](./plugins/inputs/net)
 * [nginx](./plugins/inputs/nginx)
+* [nginx_plus_api](./plugins/inputs/nginx_plus_api)
 * [nginx_plus](./plugins/inputs/nginx_plus)
+* [nginx_upstream_check](./plugins/inputs/nginx_upstream_check)
+* [nginx_vts](./plugins/inputs/nginx_vts)
+* [nsq_consumer](./plugins/inputs/nsq_consumer)
 * [nsq](./plugins/inputs/nsq)
 * [nstat](./plugins/inputs/nstat)
 * [ntpq](./plugins/inputs/ntpq)
 * [nvidia_smi](./plugins/inputs/nvidia_smi)
 * [openldap](./plugins/inputs/openldap)
+* [openntpd](./plugins/inputs/openntpd)
 * [opensmtpd](./plugins/inputs/opensmtpd)
+* [openweathermap](./plugins/inputs/openweathermap)
 * [pf](./plugins/inputs/pf)
+* [pgbouncer](./plugins/inputs/pgbouncer)
 * [phpfpm](./plugins/inputs/phpfpm)
 * [phusion passenger](./plugins/inputs/passenger)
 * [ping](./plugins/inputs/ping)
@@ -196,6 +275,8 @@ configuration options.
 * [postgresql_extensible](./plugins/inputs/postgresql_extensible)
 * [postgresql](./plugins/inputs/postgresql)
 * [powerdns](./plugins/inputs/powerdns)
+* [powerdns_recursor](./plugins/inputs/powerdns_recursor)
+* [processes](./plugins/inputs/processes)
 * [procstat](./plugins/inputs/procstat)
 * [prometheus](./plugins/inputs/prometheus) (can be used for [Caddy server](./plugins/inputs/prometheus/README.md#usage-for-caddy-http-server))
 * [puppetagent](./plugins/inputs/puppetagent)
@@ -206,48 +287,35 @@ configuration options.
 * [riak](./plugins/inputs/riak)
 * [salesforce](./plugins/inputs/salesforce)
 * [sensors](./plugins/inputs/sensors)
+* [sflow](./plugins/inputs/sflow)
 * [smart](./plugins/inputs/smart)
-* [snmp](./plugins/inputs/snmp)
 * [snmp_legacy](./plugins/inputs/snmp_legacy)
+* [snmp](./plugins/inputs/snmp)
+* [snmp_trap](./plugins/inputs/snmp_trap)
+* [socket_listener](./plugins/inputs/socket_listener)
 * [solr](./plugins/inputs/solr)
 * [sql server](./plugins/inputs/sqlserver) (microsoft)
+* [stackdriver](./plugins/inputs/stackdriver) (Google Cloud Monitoring)
+* [statsd](./plugins/inputs/statsd)
+* [suricata](./plugins/inputs/suricata)
+* [swap](./plugins/inputs/swap)
+* [synproxy](./plugins/inputs/synproxy)
 * [syslog](./plugins/inputs/syslog)
+* [sysstat](./plugins/inputs/sysstat)
+* [systemd_units](./plugins/inputs/systemd_units)
+* [system](./plugins/inputs/system)
+* [tail](./plugins/inputs/tail)
+* [temp](./plugins/inputs/temp)
+* [tcp_listener](./plugins/inputs/socket_listener)
 * [teamspeak](./plugins/inputs/teamspeak)
+* [tengine](./plugins/inputs/tengine)
 * [tomcat](./plugins/inputs/tomcat)
 * [twemproxy](./plugins/inputs/twemproxy)
-* [unbound](./plugins/inputs/unbound)
-* [varnish](./plugins/inputs/varnish)
-* [zfs](./plugins/inputs/zfs)
-* [zookeeper](./plugins/inputs/zookeeper)
-* [win_perf_counters](./plugins/inputs/win_perf_counters) (windows performance counters)
-* [win_services](./plugins/inputs/win_services)
-* [sysstat](./plugins/inputs/sysstat)
-* [system](./plugins/inputs/system)
-    * cpu
-    * mem
-    * net
-    * netstat
-    * disk
-    * diskio
-    * swap
-    * processes
-    * kernel (/proc/stat)
-    * kernel (/proc/vmstat)
-    * linux_sysctl_fs (/proc/sys/fs)
-
-Telegraf can also collect metrics via the following service plugins:
-
-* [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)
-* [socket_listener](./plugins/inputs/socket_listener)
-* [tail](./plugins/inputs/tail)
-* [tcp_listener](./plugins/inputs/socket_listener)
 * [udp_listener](./plugins/inputs/socket_listener)
+* [unbound](./plugins/inputs/unbound)
+* [uwsgi](./plugins/inputs/uwsgi)
+* [varnish](./plugins/inputs/varnish)
+* [vsphere](./plugins/inputs/vsphere) VMware vSphere
 * [webhooks](./plugins/inputs/webhooks)
   * [filestack](./plugins/inputs/webhooks/filestack)
   * [github](./plugins/inputs/webhooks/github)
@@ -255,60 +323,107 @@ Telegraf can also collect metrics via the following service plugins:
   * [papertrail](./plugins/inputs/webhooks/papertrail)
   * [particle](./plugins/inputs/webhooks/particle)
   * [rollbar](./plugins/inputs/webhooks/rollbar)
+* [win_perf_counters](./plugins/inputs/win_perf_counters) (windows performance counters)
+* [win_services](./plugins/inputs/win_services)
+* [wireguard](./plugins/inputs/wireguard)
+* [wireless](./plugins/inputs/wireless)
+* [x509_cert](./plugins/inputs/x509_cert)
+* [zfs](./plugins/inputs/zfs)
 * [zipkin](./plugins/inputs/zipkin)
+* [zookeeper](./plugins/inputs/zookeeper)
 
-Telegraf is able to parse the following input data formats into metrics, these
-formats may be used with input plugins supporting the `data_format` option:
+## Parsers
 
-* [InfluxDB Line Protocol](./docs/DATA_FORMATS_INPUT.md#influx)
-* [JSON](./docs/DATA_FORMATS_INPUT.md#json)
-* [Graphite](./docs/DATA_FORMATS_INPUT.md#graphite)
-* [Value](./docs/DATA_FORMATS_INPUT.md#value)
-* [Nagios](./docs/DATA_FORMATS_INPUT.md#nagios)
-* [Collectd](./docs/DATA_FORMATS_INPUT.md#collectd)
-* [Dropwizard](./docs/DATA_FORMATS_INPUT.md#dropwizard)
+- [InfluxDB Line Protocol](/plugins/parsers/influx)
+- [Collectd](/plugins/parsers/collectd)
+- [CSV](/plugins/parsers/csv)
+- [Dropwizard](/plugins/parsers/dropwizard)
+- [FormUrlencoded](/plugins/parser/form_urlencoded)
+- [Graphite](/plugins/parsers/graphite)
+- [Grok](/plugins/parsers/grok)
+- [JSON](/plugins/parsers/json)
+- [Logfmt](/plugins/parsers/logfmt)
+- [Nagios](/plugins/parsers/nagios)
+- [Value](/plugins/parsers/value), ie: 45 or "booyah"
+- [Wavefront](/plugins/parsers/wavefront)
+
+## Serializers
+
+- [InfluxDB Line Protocol](/plugins/serializers/influx)
+- [JSON](/plugins/serializers/json)
+- [Graphite](/plugins/serializers/graphite)
+- [ServiceNow](/plugins/serializers/nowmetric)
+- [SplunkMetric](/plugins/serializers/splunkmetric)
+- [Carbon2](/plugins/serializers/carbon2)
+- [Wavefront](/plugins/serializers/wavefront)
 
 ## Processor Plugins
 
-* [converter](./plugins/processors/converter)
-* [override](./plugins/processors/override)
-* [printer](./plugins/processors/printer)
-* [regex](./plugins/processors/regex)
-* [topk](./plugins/processors/topk)
+* [clone](/plugins/processors/clone)
+* [converter](/plugins/processors/converter)
+* [date](/plugins/processors/date)
+* [dedup](/plugins/processors/dedup)
+* [defaults](/plugins/processors/defaults)
+* [enum](/plugins/processors/enum)
+* [filepath](/plugins/processors/filepath)
+* [override](/plugins/processors/override)
+* [parser](/plugins/processors/parser)
+* [pivot](/plugins/processors/pivot)
+* [printer](/plugins/processors/printer)
+* [regex](/plugins/processors/regex)
+* [rename](/plugins/processors/rename)
+* [s2geo](/plugins/processors/s2geo)
+* [strings](/plugins/processors/strings)
+* [tag_limit](/plugins/processors/tag_limit)
+* [template](/plugins/processors/template)
+* [topk](/plugins/processors/topk)
+* [unpivot](/plugins/processors/unpivot)
 
 ## Aggregator Plugins
 
 * [basicstats](./plugins/aggregators/basicstats)
-* [minmax](./plugins/aggregators/minmax)
+* [final](./plugins/aggregators/final)
 * [histogram](./plugins/aggregators/histogram)
+* [merge](./plugins/aggregators/merge)
+* [minmax](./plugins/aggregators/minmax)
+* [valuecounter](./plugins/aggregators/valuecounter)
 
 ## Output Plugins
 
-* [influxdb](./plugins/outputs/influxdb)
+* [influxdb](./plugins/outputs/influxdb) (InfluxDB 1.x)
+* [influxdb_v2](./plugins/outputs/influxdb_v2) ([InfluxDB 2.x](https://github.com/influxdata/influxdb))
 * [amon](./plugins/outputs/amon)
 * [amqp](./plugins/outputs/amqp) (rabbitmq)
 * [application_insights](./plugins/outputs/application_insights)
 * [aws kinesis](./plugins/outputs/kinesis)
 * [aws cloudwatch](./plugins/outputs/cloudwatch)
+* [azure_monitor](./plugins/outputs/azure_monitor)
+* [cloud_pubsub](./plugins/outputs/cloud_pubsub) Google Cloud Pub/Sub
 * [cratedb](./plugins/outputs/cratedb)
 * [datadog](./plugins/outputs/datadog)
 * [discard](./plugins/outputs/discard)
 * [elasticsearch](./plugins/outputs/elasticsearch)
+* [exec](./plugins/outputs/exec)
 * [file](./plugins/outputs/file)
 * [graphite](./plugins/outputs/graphite)
 * [graylog](./plugins/outputs/graylog)
+* [health](./plugins/outputs/health)
 * [http](./plugins/outputs/http)
 * [instrumental](./plugins/outputs/instrumental)
 * [kafka](./plugins/outputs/kafka)
 * [librato](./plugins/outputs/librato)
 * [mqtt](./plugins/outputs/mqtt)
 * [nats](./plugins/outputs/nats)
+* [newrelic](./plugins/outputs/newrelic)
 * [nsq](./plugins/outputs/nsq)
 * [opentsdb](./plugins/outputs/opentsdb)
 * [prometheus](./plugins/outputs/prometheus_client)
 * [riemann](./plugins/outputs/riemann)
 * [riemann_legacy](./plugins/outputs/riemann_legacy)
 * [socket_writer](./plugins/outputs/socket_writer)
+* [stackdriver](./plugins/outputs/stackdriver) (Google Cloud Monitoring)
+* [syslog](./plugins/outputs/syslog)
 * [tcp](./plugins/outputs/socket_writer)
 * [udp](./plugins/outputs/socket_writer)
+* [warp10](./plugins/outputs/warp10)
 * [wavefront](./plugins/outputs/wavefront)

accumulator.go

@@ -1,16 +1,14 @@
 package telegraf
 
-import "time"
+import (
+	"time"
+)
 
-// Accumulator is an interface for "accumulating" metrics from plugin(s).
-// The metrics are sent down a channel shared between all plugins.
+// Accumulator allows adding metrics to the processing flow.
 type Accumulator interface {
 	// 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,
@@ -40,7 +38,48 @@ type Accumulator interface {
 		tags map[string]string,
 		t ...time.Time)
 
-	SetPrecision(precision, interval time.Duration)
+	// AddMetric adds an metric to the accumulator.
+	AddMetric(Metric)
 
+	// SetPrecision sets the timestamp rounding precision.  All metrics addeds
+	// added to the accumulator will have their timestamp rounded to the
+	// nearest multiple of precision.
+	SetPrecision(precision time.Duration)
+
+	// Report an error.
 	AddError(err error)
+
+	// Upgrade to a TrackingAccumulator with space for maxTracked
+	// metrics/batches.
+	WithTracking(maxTracked int) TrackingAccumulator
+}
+
+// TrackingID uniquely identifies a tracked metric group
+type TrackingID uint64
+
+// DeliveryInfo provides the results of a delivered metric group.
+type DeliveryInfo interface {
+	// ID is the TrackingID
+	ID() TrackingID
+
+	// Delivered returns true if the metric was processed successfully.
+	Delivered() bool
+}
+
+// TrackingAccumulator is an Accumulator that provides a signal when the
+// metric has been fully processed.  Sending more metrics than the accumulator
+// has been allocated for without reading status from the Accepted or Rejected
+// channels is an error.
+type TrackingAccumulator interface {
+	Accumulator
+
+	// Add the Metric and arrange for tracking feedback after processing..
+	AddTrackingMetric(m Metric) TrackingID
+
+	// Add a group of Metrics and arrange for a signal when the group has been
+	// processed.
+	AddTrackingMetricGroup(group []Metric) TrackingID
+
+	// Delivered returns a channel that will contain the tracking results.
+	Delivered() <-chan DeliveryInfo
 }

agent/accumulator.go

@@ -1,31 +1,27 @@
 package agent
 
 import (
-	"log"
 	"time"
 
 	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/selfstat"
-)
-
-var (
-	NErrors = selfstat.Register("agent", "gather_errors", map[string]string{})
+	"github.com/influxdata/telegraf/metric"
 )
 
 type MetricMaker interface {
-	Name() string
-	MakeMetric(
-		measurement string,
-		fields map[string]interface{},
-		tags map[string]string,
-		mType telegraf.ValueType,
-		t time.Time,
-	) telegraf.Metric
+	LogName() string
+	MakeMetric(metric telegraf.Metric) telegraf.Metric
+	Log() telegraf.Logger
+}
+
+type accumulator struct {
+	maker     MetricMaker
+	metrics   chan<- telegraf.Metric
+	precision time.Duration
 }
 
 func NewAccumulator(
 	maker MetricMaker,
-	metrics chan telegraf.Metric,
+	metrics chan<- telegraf.Metric,
 ) telegraf.Accumulator {
 	acc := accumulator{
 		maker:     maker,
@@ -35,23 +31,13 @@ func NewAccumulator(
 	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
-	}
+	ac.addFields(measurement, tags, fields, telegraf.Untyped, t...)
 }
 
 func (ac *accumulator) AddGauge(
@@ -60,9 +46,7 @@ func (ac *accumulator) AddGauge(
 	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
-	}
+	ac.addFields(measurement, tags, fields, telegraf.Gauge, t...)
 }
 
 func (ac *accumulator) AddCounter(
@@ -71,9 +55,7 @@ func (ac *accumulator) AddCounter(
 	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
-	}
+	ac.addFields(measurement, tags, fields, telegraf.Counter, t...)
 }
 
 func (ac *accumulator) AddSummary(
@@ -82,9 +64,7 @@ func (ac *accumulator) AddSummary(
 	tags map[string]string,
 	t ...time.Time,
 ) {
-	if m := ac.maker.MakeMetric(measurement, fields, tags, telegraf.Summary, ac.getTime(t)); m != nil {
-		ac.metrics <- m
-	}
+	ac.addFields(measurement, tags, fields, telegraf.Summary, t...)
 }
 
 func (ac *accumulator) AddHistogram(
@@ -93,7 +73,28 @@ func (ac *accumulator) AddHistogram(
 	tags map[string]string,
 	t ...time.Time,
 ) {
-	if m := ac.maker.MakeMetric(measurement, fields, tags, telegraf.Histogram, ac.getTime(t)); m != nil {
+	ac.addFields(measurement, tags, fields, telegraf.Histogram, t...)
+}
+
+func (ac *accumulator) AddMetric(m telegraf.Metric) {
+	m.SetTime(m.Time().Round(ac.precision))
+	if m := ac.maker.MakeMetric(m); m != nil {
+		ac.metrics <- m
+	}
+}
+
+func (ac *accumulator) addFields(
+	measurement string,
+	tags map[string]string,
+	fields map[string]interface{},
+	tp telegraf.ValueType,
+	t ...time.Time,
+) {
+	m, err := metric.New(measurement, tags, fields, ac.getTime(t), tp)
+	if err != nil {
+		return
+	}
+	if m := ac.maker.MakeMetric(m); m != nil {
 		ac.metrics <- m
 	}
 }
@@ -104,33 +105,14 @@ 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)
+	ac.maker.Log().Errorf("Error in plugin: %v", 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) SetPrecision(precision time.Duration) {
+	ac.precision = precision
 }
 
-func (ac accumulator) getTime(t []time.Time) time.Time {
+func (ac *accumulator) getTime(t []time.Time) time.Time {
 	var timestamp time.Time
 	if len(t) > 0 {
 		timestamp = t[0]
@@ -139,3 +121,43 @@ func (ac accumulator) getTime(t []time.Time) time.Time {
 	}
 	return timestamp.Round(ac.precision)
 }
+
+func (ac *accumulator) WithTracking(maxTracked int) telegraf.TrackingAccumulator {
+	return &trackingAccumulator{
+		Accumulator: ac,
+		delivered:   make(chan telegraf.DeliveryInfo, maxTracked),
+	}
+}
+
+type trackingAccumulator struct {
+	telegraf.Accumulator
+	delivered chan telegraf.DeliveryInfo
+}
+
+func (a *trackingAccumulator) AddTrackingMetric(m telegraf.Metric) telegraf.TrackingID {
+	dm, id := metric.WithTracking(m, a.onDelivery)
+	a.AddMetric(dm)
+	return id
+}
+
+func (a *trackingAccumulator) AddTrackingMetricGroup(group []telegraf.Metric) telegraf.TrackingID {
+	db, id := metric.WithGroupTracking(group, a.onDelivery)
+	for _, m := range db {
+		a.AddMetric(m)
+	}
+	return id
+}
+
+func (a *trackingAccumulator) Delivered() <-chan telegraf.DeliveryInfo {
+	return a.delivered
+}
+
+func (a *trackingAccumulator) onDelivery(info telegraf.DeliveryInfo) {
+	select {
+	case a.delivered <- info:
+	default:
+		// This is a programming error in the input.  More items were sent for
+		// tracking than space requested.
+		panic("channel is full")
+	}
+}

agent/accumulator_test.go

@@ -9,8 +9,7 @@ import (
 	"time"
 
 	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/metric"
-
+	"github.com/influxdata/telegraf/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -61,7 +60,6 @@ func TestAccAddError(t *testing.T) {
 	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")
@@ -76,7 +74,6 @@ func TestSetPrecision(t *testing.T) {
 		name      string
 		unset     bool
 		precision time.Duration
-		interval  time.Duration
 		timestamp time.Time
 		expected  time.Time
 	}{
@@ -88,13 +85,13 @@ func TestSetPrecision(t *testing.T) {
 		},
 		{
 			name:      "second interval",
-			interval:  time.Second,
+			precision: time.Second,
 			timestamp: time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC),
 			expected:  time.Date(2006, time.February, 10, 12, 0, 0, 0, time.UTC),
 		},
 		{
 			name:      "microsecond interval",
-			interval:  time.Microsecond,
+			precision: time.Microsecond,
 			timestamp: time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC),
 			expected:  time.Date(2006, time.February, 10, 12, 0, 0, 82913000, time.UTC),
 		},
@@ -111,7 +108,7 @@ func TestSetPrecision(t *testing.T) {
 
 			a := NewAccumulator(&TestMetricMaker{}, metrics)
 			if !tt.unset {
-				a.SetPrecision(tt.precision, tt.interval)
+				a.SetPrecision(tt.precision)
 			}
 
 			a.AddFields("acctest",
@@ -128,32 +125,36 @@ func TestSetPrecision(t *testing.T) {
 	}
 }
 
+func TestAddTrackingMetricGroupEmpty(t *testing.T) {
+	ch := make(chan telegraf.Metric, 10)
+	metrics := []telegraf.Metric{}
+	acc := NewAccumulator(&TestMetricMaker{}, ch).WithTracking(1)
+
+	id := acc.AddTrackingMetricGroup(metrics)
+
+	select {
+	case tracking := <-acc.Delivered():
+		require.Equal(t, tracking.ID(), id)
+	default:
+		t.Fatal("empty group should be delivered immediately")
+	}
+}
+
 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
+
+func (tm *TestMetricMaker) LogName() string {
+	return tm.Name()
+}
+
+func (tm *TestMetricMaker) MakeMetric(metric telegraf.Metric) telegraf.Metric {
+	return metric
+}
+
+func (tm *TestMetricMaker) Log() telegraf.Logger {
+	return models.NewLogger("TestPlugin", "test", "")
 }

agent/agent_posix.go

@@ -0,0 +1,19 @@
+// +build !windows
+
+package agent
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+const flushSignal = syscall.SIGUSR1
+
+func watchForFlushSignal(flushRequested chan os.Signal) {
+	signal.Notify(flushRequested, flushSignal)
+}
+
+func stopListeningForFlushSignal(flushRequested chan os.Signal) {
+	defer signal.Stop(flushRequested)
+}

agent/agent_test.go

@@ -2,15 +2,13 @@ package agent
 
 import (
 	"testing"
+	"time"
 
-	"github.com/influxdata/telegraf/internal/config"
-
-	// needing to load the plugins
+	"github.com/influxdata/telegraf/config"
 	_ "github.com/influxdata/telegraf/plugins/inputs/all"
-	// needing to load the outputs
 	_ "github.com/influxdata/telegraf/plugins/outputs/all"
-
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestAgent_OmitHostname(t *testing.T) {
@@ -24,35 +22,35 @@ func TestAgent_OmitHostname(t *testing.T) {
 func TestAgent_LoadPlugin(t *testing.T) {
 	c := config.NewConfig()
 	c.InputFilters = []string{"mysql"}
-	err := c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	err := c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../config/testdata/telegraf-agent.toml")
 	assert.NoError(t, err)
 	a, _ = NewAgent(c)
 	assert.Equal(t, 2, len(a.Config.Inputs))
@@ -61,42 +59,42 @@ func TestAgent_LoadPlugin(t *testing.T) {
 func TestAgent_LoadOutput(t *testing.T) {
 	c := config.NewConfig()
 	c.OutputFilters = []string{"influxdb"}
-	err := c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	err := c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../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")
+	err = c.LoadConfig("../config/testdata/telegraf-agent.toml")
 	assert.NoError(t, err)
 	assert.Equal(t, 3, len(c.Outputs))
 	a, _ = NewAgent(c)
@@ -104,8 +102,67 @@ func TestAgent_LoadOutput(t *testing.T) {
 
 	c = config.NewConfig()
 	c.OutputFilters = []string{"influxdb", "foo", "kafka", "bar"}
-	err = c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	err = c.LoadConfig("../config/testdata/telegraf-agent.toml")
 	assert.NoError(t, err)
 	a, _ = NewAgent(c)
 	assert.Equal(t, 3, len(a.Config.Outputs))
 }
+
+func TestWindow(t *testing.T) {
+	parse := func(s string) time.Time {
+		tm, err := time.Parse(time.RFC3339, s)
+		if err != nil {
+			panic(err)
+		}
+		return tm
+	}
+
+	tests := []struct {
+		name          string
+		start         time.Time
+		roundInterval bool
+		period        time.Duration
+		since         time.Time
+		until         time.Time
+	}{
+		{
+			name:          "round with exact alignment",
+			start:         parse("2018-03-27T00:00:00Z"),
+			roundInterval: true,
+			period:        30 * time.Second,
+			since:         parse("2018-03-27T00:00:00Z"),
+			until:         parse("2018-03-27T00:00:30Z"),
+		},
+		{
+			name:          "round with alignment needed",
+			start:         parse("2018-03-27T00:00:05Z"),
+			roundInterval: true,
+			period:        30 * time.Second,
+			since:         parse("2018-03-27T00:00:00Z"),
+			until:         parse("2018-03-27T00:00:30Z"),
+		},
+		{
+			name:          "no round with exact alignment",
+			start:         parse("2018-03-27T00:00:00Z"),
+			roundInterval: false,
+			period:        30 * time.Second,
+			since:         parse("2018-03-27T00:00:00Z"),
+			until:         parse("2018-03-27T00:00:30Z"),
+		},
+		{
+			name:          "no found with alignment needed",
+			start:         parse("2018-03-27T00:00:05Z"),
+			roundInterval: false,
+			period:        30 * time.Second,
+			since:         parse("2018-03-27T00:00:05Z"),
+			until:         parse("2018-03-27T00:00:35Z"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			since, until := updateWindow(tt.start, tt.roundInterval, tt.period)
+			require.Equal(t, tt.since, since, "since")
+			require.Equal(t, tt.until, until, "until")
+		})
+	}
+}

agent/agent_windows.go

@@ -0,0 +1,13 @@
+// +build windows
+
+package agent
+
+import "os"
+
+func watchForFlushSignal(flushRequested chan os.Signal) {
+	// not supported
+}
+
+func stopListeningForFlushSignal(flushRequested chan os.Signal) {
+	// not supported
+}

agent/tick.go

@@ -0,0 +1,268 @@
+package agent
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	"github.com/benbjohnson/clock"
+	"github.com/influxdata/telegraf/internal"
+)
+
+type empty struct{}
+
+type Ticker interface {
+	Elapsed() <-chan time.Time
+	Stop()
+}
+
+// AlignedTicker delivers ticks at aligned times plus an optional jitter.  Each
+// tick is realigned to avoid drift and handle changes to the system clock.
+//
+// The ticks may have an jitter duration applied to them as an random offset to
+// the interval.  However the overall pace of is that of the interval, so on
+// average you will have one collection each interval.
+//
+// The first tick is emitted at the next alignment.
+//
+// Ticks are dropped for slow consumers.
+//
+// The implementation currently does not recalculate until the next tick with
+// no maximum sleep, when using large intervals alignment is not corrected
+// until the next tick.
+type AlignedTicker struct {
+	interval time.Duration
+	jitter   time.Duration
+	ch       chan time.Time
+	cancel   context.CancelFunc
+	wg       sync.WaitGroup
+}
+
+func NewAlignedTicker(now time.Time, interval, jitter time.Duration) *AlignedTicker {
+	return newAlignedTicker(now, interval, jitter, clock.New())
+}
+
+func newAlignedTicker(now time.Time, interval, jitter time.Duration, clock clock.Clock) *AlignedTicker {
+	ctx, cancel := context.WithCancel(context.Background())
+	t := &AlignedTicker{
+		interval: interval,
+		jitter:   jitter,
+		ch:       make(chan time.Time, 1),
+		cancel:   cancel,
+	}
+
+	d := t.next(now)
+	timer := clock.Timer(d)
+
+	t.wg.Add(1)
+	go func() {
+		defer t.wg.Done()
+		t.run(ctx, timer)
+	}()
+
+	return t
+}
+
+func (t *AlignedTicker) next(now time.Time) time.Duration {
+	next := internal.AlignTime(now, t.interval)
+	d := next.Sub(now)
+	if d == 0 {
+		d = t.interval
+	}
+	d += internal.RandomDuration(t.jitter)
+	return d
+}
+
+func (t *AlignedTicker) run(ctx context.Context, timer *clock.Timer) {
+	for {
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			return
+		case now := <-timer.C:
+			select {
+			case t.ch <- now:
+			default:
+			}
+
+			d := t.next(now)
+			timer.Reset(d)
+		}
+	}
+}
+
+func (t *AlignedTicker) Elapsed() <-chan time.Time {
+	return t.ch
+}
+
+func (t *AlignedTicker) Stop() {
+	t.cancel()
+	t.wg.Wait()
+}
+
+// UnalignedTicker delivers ticks at regular but unaligned intervals.  No
+// effort is made to avoid drift.
+//
+// The ticks may have an jitter duration applied to them as an random offset to
+// the interval.  However the overall pace of is that of the interval, so on
+// average you will have one collection each interval.
+//
+// The first tick is emitted immediately.
+//
+// Ticks are dropped for slow consumers.
+type UnalignedTicker struct {
+	interval time.Duration
+	jitter   time.Duration
+	ch       chan time.Time
+	cancel   context.CancelFunc
+	wg       sync.WaitGroup
+}
+
+func NewUnalignedTicker(interval, jitter time.Duration) *UnalignedTicker {
+	return newUnalignedTicker(interval, jitter, clock.New())
+}
+
+func newUnalignedTicker(interval, jitter time.Duration, clock clock.Clock) *UnalignedTicker {
+	ctx, cancel := context.WithCancel(context.Background())
+	t := &UnalignedTicker{
+		interval: interval,
+		jitter:   jitter,
+		ch:       make(chan time.Time, 1),
+		cancel:   cancel,
+	}
+
+	ticker := clock.Ticker(t.interval)
+	t.ch <- clock.Now()
+
+	t.wg.Add(1)
+	go func() {
+		defer t.wg.Done()
+		t.run(ctx, ticker, clock)
+	}()
+
+	return t
+}
+
+func sleep(ctx context.Context, duration time.Duration, clock clock.Clock) error {
+	if duration == 0 {
+		return nil
+	}
+
+	t := clock.Timer(duration)
+	select {
+	case <-t.C:
+		return nil
+	case <-ctx.Done():
+		t.Stop()
+		return ctx.Err()
+	}
+}
+
+func (t *UnalignedTicker) run(ctx context.Context, ticker *clock.Ticker, clock clock.Clock) {
+	for {
+		select {
+		case <-ctx.Done():
+			ticker.Stop()
+			return
+		case <-ticker.C:
+			jitter := internal.RandomDuration(t.jitter)
+			err := sleep(ctx, jitter, clock)
+			if err != nil {
+				ticker.Stop()
+				return
+			}
+			select {
+			case t.ch <- clock.Now():
+			default:
+			}
+		}
+	}
+}
+
+func (t *UnalignedTicker) InjectTick() {
+	t.ch <- time.Now()
+}
+
+func (t *UnalignedTicker) Elapsed() <-chan time.Time {
+	return t.ch
+}
+
+func (t *UnalignedTicker) Stop() {
+	t.cancel()
+	t.wg.Wait()
+}
+
+// RollingTicker delivers ticks at regular but unaligned intervals.
+//
+// Because the next interval is scheduled based on the interval + jitter, you
+// are guaranteed at least interval seconds without missing a tick and ticks
+// will be evenly scheduled over time.
+//
+// On average you will have one collection each interval + (jitter/2).
+//
+// The first tick is emitted after interval+jitter seconds.
+//
+// Ticks are dropped for slow consumers.
+type RollingTicker struct {
+	interval time.Duration
+	jitter   time.Duration
+	ch       chan time.Time
+	cancel   context.CancelFunc
+	wg       sync.WaitGroup
+}
+
+func NewRollingTicker(interval, jitter time.Duration) *RollingTicker {
+	return newRollingTicker(interval, jitter, clock.New())
+}
+
+func newRollingTicker(interval, jitter time.Duration, clock clock.Clock) *RollingTicker {
+	ctx, cancel := context.WithCancel(context.Background())
+	t := &RollingTicker{
+		interval: interval,
+		jitter:   jitter,
+		ch:       make(chan time.Time, 1),
+		cancel:   cancel,
+	}
+
+	d := t.next()
+	timer := clock.Timer(d)
+
+	t.wg.Add(1)
+	go func() {
+		defer t.wg.Done()
+		t.run(ctx, timer)
+	}()
+
+	return t
+}
+
+func (t *RollingTicker) next() time.Duration {
+	return t.interval + internal.RandomDuration(t.jitter)
+}
+
+func (t *RollingTicker) run(ctx context.Context, timer *clock.Timer) {
+	for {
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			return
+		case now := <-timer.C:
+			select {
+			case t.ch <- now:
+			default:
+			}
+
+			d := t.next()
+			timer.Reset(d)
+		}
+	}
+}
+
+func (t *RollingTicker) Elapsed() <-chan time.Time {
+	return t.ch
+}
+
+func (t *RollingTicker) Stop() {
+	t.cancel()
+	t.wg.Wait()
+}

agent/tick_test.go

@@ -0,0 +1,251 @@
+package agent
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/benbjohnson/clock"
+	"github.com/stretchr/testify/require"
+)
+
+var format = "2006-01-02T15:04:05.999Z07:00"
+
+func TestAlignedTicker(t *testing.T) {
+	interval := 10 * time.Second
+	jitter := 0 * time.Second
+
+	clock := clock.NewMock()
+	since := clock.Now()
+	until := since.Add(60 * time.Second)
+
+	ticker := newAlignedTicker(since, interval, jitter, clock)
+
+	expected := []time.Time{
+		time.Unix(10, 0).UTC(),
+		time.Unix(20, 0).UTC(),
+		time.Unix(30, 0).UTC(),
+		time.Unix(40, 0).UTC(),
+		time.Unix(50, 0).UTC(),
+		time.Unix(60, 0).UTC(),
+	}
+
+	actual := []time.Time{}
+	for !clock.Now().After(until) {
+		select {
+		case tm := <-ticker.Elapsed():
+			actual = append(actual, tm.UTC())
+		default:
+		}
+		clock.Add(10 * time.Second)
+	}
+
+	require.Equal(t, expected, actual)
+}
+
+func TestAlignedTickerJitter(t *testing.T) {
+	interval := 10 * time.Second
+	jitter := 5 * time.Second
+
+	clock := clock.NewMock()
+	since := clock.Now()
+	until := since.Add(60 * time.Second)
+
+	ticker := newAlignedTicker(since, interval, jitter, clock)
+
+	last := since
+	for !clock.Now().After(until) {
+		select {
+		case tm := <-ticker.Elapsed():
+			require.True(t, tm.Sub(last) <= 15*time.Second)
+			require.True(t, tm.Sub(last) >= 5*time.Second)
+			last = last.Add(interval)
+		default:
+		}
+		clock.Add(5 * time.Second)
+	}
+}
+
+func TestAlignedTickerMissedTick(t *testing.T) {
+	interval := 10 * time.Second
+	jitter := 0 * time.Second
+
+	clock := clock.NewMock()
+	since := clock.Now()
+
+	ticker := newAlignedTicker(since, interval, jitter, clock)
+
+	clock.Add(25 * time.Second)
+	tm := <-ticker.Elapsed()
+	require.Equal(t, time.Unix(10, 0).UTC(), tm.UTC())
+	clock.Add(5 * time.Second)
+	tm = <-ticker.Elapsed()
+	require.Equal(t, time.Unix(30, 0).UTC(), tm.UTC())
+}
+
+func TestUnalignedTicker(t *testing.T) {
+	interval := 10 * time.Second
+	jitter := 0 * time.Second
+
+	clock := clock.NewMock()
+	clock.Add(1 * time.Second)
+	since := clock.Now()
+	until := since.Add(60 * time.Second)
+
+	ticker := newUnalignedTicker(interval, jitter, clock)
+
+	expected := []time.Time{
+		time.Unix(1, 0).UTC(),
+		time.Unix(11, 0).UTC(),
+		time.Unix(21, 0).UTC(),
+		time.Unix(31, 0).UTC(),
+		time.Unix(41, 0).UTC(),
+		time.Unix(51, 0).UTC(),
+		time.Unix(61, 0).UTC(),
+	}
+
+	actual := []time.Time{}
+	for !clock.Now().After(until) {
+		select {
+		case tm := <-ticker.Elapsed():
+			actual = append(actual, tm.UTC())
+		default:
+		}
+		clock.Add(10 * time.Second)
+	}
+
+	require.Equal(t, expected, actual)
+}
+
+func TestRollingTicker(t *testing.T) {
+	interval := 10 * time.Second
+	jitter := 0 * time.Second
+
+	clock := clock.NewMock()
+	clock.Add(1 * time.Second)
+	since := clock.Now()
+	until := since.Add(60 * time.Second)
+
+	ticker := newUnalignedTicker(interval, jitter, clock)
+
+	expected := []time.Time{
+		time.Unix(1, 0).UTC(),
+		time.Unix(11, 0).UTC(),
+		time.Unix(21, 0).UTC(),
+		time.Unix(31, 0).UTC(),
+		time.Unix(41, 0).UTC(),
+		time.Unix(51, 0).UTC(),
+		time.Unix(61, 0).UTC(),
+	}
+
+	actual := []time.Time{}
+	for !clock.Now().After(until) {
+		select {
+		case tm := <-ticker.Elapsed():
+			actual = append(actual, tm.UTC())
+		default:
+		}
+		clock.Add(10 * time.Second)
+	}
+
+	require.Equal(t, expected, actual)
+}
+
+// Simulates running the Ticker for an hour and displays stats about the
+// operation.
+func TestAlignedTickerDistribution(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping test in short mode.")
+	}
+
+	interval := 10 * time.Second
+	jitter := 5 * time.Second
+
+	clock := clock.NewMock()
+	since := clock.Now()
+
+	ticker := newAlignedTicker(since, interval, jitter, clock)
+	dist := simulatedDist(ticker, clock)
+	printDist(dist)
+	require.True(t, 350 < dist.Count)
+	require.True(t, 9 < dist.Mean() && dist.Mean() < 11)
+}
+
+// Simulates running the Ticker for an hour and displays stats about the
+// operation.
+func TestUnalignedTickerDistribution(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping test in short mode.")
+	}
+
+	interval := 10 * time.Second
+	jitter := 5 * time.Second
+
+	clock := clock.NewMock()
+
+	ticker := newUnalignedTicker(interval, jitter, clock)
+	dist := simulatedDist(ticker, clock)
+	printDist(dist)
+	require.True(t, 350 < dist.Count)
+	require.True(t, 9 < dist.Mean() && dist.Mean() < 11)
+}
+
+// Simulates running the Ticker for an hour and displays stats about the
+// operation.
+func TestRollingTickerDistribution(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping test in short mode.")
+	}
+
+	interval := 10 * time.Second
+	jitter := 5 * time.Second
+
+	clock := clock.NewMock()
+
+	ticker := newRollingTicker(interval, jitter, clock)
+	dist := simulatedDist(ticker, clock)
+	printDist(dist)
+	require.True(t, 275 < dist.Count)
+	require.True(t, 12 < dist.Mean() && 13 > dist.Mean())
+}
+
+type Distribution struct {
+	Buckets  [60]int
+	Count    int
+	Waittime float64
+}
+
+func (d *Distribution) Mean() float64 {
+	return d.Waittime / float64(d.Count)
+}
+
+func printDist(dist Distribution) {
+	for i, count := range dist.Buckets {
+		fmt.Printf("%2d %s\n", i, strings.Repeat("x", count))
+	}
+	fmt.Printf("Average interval: %f\n", dist.Mean())
+	fmt.Printf("Count: %d\n", dist.Count)
+}
+
+func simulatedDist(ticker Ticker, clock *clock.Mock) Distribution {
+	since := clock.Now()
+	until := since.Add(1 * time.Hour)
+
+	var dist Distribution
+
+	last := clock.Now()
+	for !clock.Now().After(until) {
+		select {
+		case tm := <-ticker.Elapsed():
+			dist.Buckets[tm.Second()] += 1
+			dist.Count++
+			dist.Waittime += tm.Sub(last).Seconds()
+			last = tm
+		default:
+			clock.Add(1 * time.Second)
+		}
+	}
+
+	return dist
+}

aggregator.go

@@ -5,11 +5,7 @@ package telegraf
 // 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
+	PluginDescriber
 
 	// Add the metric to the aggregator.
 	Add(in Metric)

appveyor.yml

@@ -1,33 +1,35 @@
 version: "{build}"
 
+image: Visual Studio 2019
+
 cache:
- - C:\Cache
+ - C:\gopath\pkg\mod -> go.sum
+ - C:\ProgramData\chocolatey\bin -> appveyor.yml
+ - C:\ProgramData\chocolatey\lib -> appveyor.yml
 
 clone_folder: C:\gopath\src\github.com\influxdata\telegraf
 
 environment:
   GOPATH: C:\gopath
 
+stack: go 1.14
+
 platform: x64
 
 install:
-  - IF NOT EXIST "C:\Cache" mkdir C:\Cache
-  - IF NOT EXIST "C:\Cache\go1.10.1.msi" curl -o "C:\Cache\go1.10.1.msi" https://storage.googleapis.com/golang/go1.10.1.windows-amd64.msi
-  - IF NOT EXIST "C:\Cache\gnuwin32-bin.zip" curl -o "C:\Cache\gnuwin32-bin.zip" https://dl.influxdata.com/telegraf/ci/make-3.81-bin.zip
-  - IF NOT EXIST "C:\Cache\gnuwin32-dep.zip" curl -o "C:\Cache\gnuwin32-dep.zip" https://dl.influxdata.com/telegraf/ci/make-3.81-dep.zip
-  - IF EXIST "C:\Go" rmdir /S /Q C:\Go
-  - msiexec.exe /i "C:\Cache\go1.10.1.msi" /quiet
-  - 7z x "C:\Cache\gnuwin32-bin.zip" -oC:\GnuWin32 -y
-  - 7z x "C:\Cache\gnuwin32-dep.zip" -oC:\GnuWin32 -y
+  - choco install make
+  - cd "%GOPATH%\src\github.com\influxdata\telegraf"
+  - git config --system core.longpaths true
   - go version
   - go env
 
 build_script:
-  - cmd: C:\GnuWin32\bin\make deps
-  - cmd: C:\GnuWin32\bin\make telegraf
+  - make deps
+  - make telegraf
 
 test_script:
-  - cmd: C:\GnuWin32\bin\make test-windows
+  - make check
+  - make test-windows
 
 artifacts:
   - path: telegraf.exe

cmd/telegraf/telegraf.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"context"
+	"errors"
 	"flag"
 	"fmt"
 	"log"
@@ -8,13 +10,15 @@ import (
 	_ "net/http/pprof" // Comment this line to disable pprof endpoint.
 	"os"
 	"os/signal"
-	"runtime"
+	"sort"
 	"strings"
 	"syscall"
+	"time"
 
 	"github.com/influxdata/telegraf/agent"
+	"github.com/influxdata/telegraf/config"
 	"github.com/influxdata/telegraf/internal"
-	"github.com/influxdata/telegraf/internal/config"
+	"github.com/influxdata/telegraf/internal/goplugin"
 	"github.com/influxdata/telegraf/logger"
 	_ "github.com/influxdata/telegraf/plugins/aggregators/all"
 	"github.com/influxdata/telegraf/plugins/inputs"
@@ -22,23 +26,26 @@ import (
 	"github.com/influxdata/telegraf/plugins/outputs"
 	_ "github.com/influxdata/telegraf/plugins/outputs/all"
 	_ "github.com/influxdata/telegraf/plugins/processors/all"
-	"github.com/kardianos/service"
 )
 
+// If you update these, update usage.go and usage_windows.go
 var fDebug = flag.Bool("debug", false,
 	"turn on debug logging")
 var pprofAddr = flag.String("pprof-addr", "",
 	"pprof address to listen on, not activate pprof if empty")
 var fQuiet = flag.Bool("quiet", false,
 	"run in quiet mode")
-var fTest = flag.Bool("test", false, "gather metrics, print them out, and exit")
+var fTest = flag.Bool("test", false, "enable test mode: gather metrics, print them out, and exit. Note: Test mode only runs inputs, not processors, aggregators, or outputs")
+var fTestWait = flag.Int("test-wait", 0, "wait up to this many seconds for service inputs to complete in test mode")
 var fConfig = flag.String("config", "", "configuration file to load")
 var fConfigDirectory = flag.String("config-directory", "",
 	"directory containing additional *.conf files")
-var fVersion = flag.Bool("version", false, "display the version")
+var fVersion = flag.Bool("version", false, "display the version and exit")
 var fSampleConfig = flag.Bool("sample-config", false,
 	"print out full sample configuration")
 var fPidfile = flag.String("pidfile", "", "file to write our pid to")
+var fSectionFilters = flag.String("section-filter", "",
+	"filter the sections to print, separator is ':'. Valid values are 'agent', 'global_tags', 'outputs', 'processors', 'aggregators' and 'inputs'")
 var fInputFilters = flag.String("input-filter", "",
 	"filter the inputs to enable, separator is :")
 var fInputList = flag.Bool("input-list", false,
@@ -54,30 +61,23 @@ var fProcessorFilters = flag.String("processor-filter", "",
 var fUsage = flag.String("usage", "",
 	"print usage for a plugin, ie, 'telegraf --usage mysql'")
 var fService = flag.String("service", "",
-	"operate on the service")
+	"operate on the service (windows only)")
+var fServiceName = flag.String("service-name", "telegraf", "service name (windows only)")
+var fServiceDisplayName = flag.String("service-display-name", "Telegraf Data Collector Service", "service display name (windows only)")
 var fRunAsConsole = flag.Bool("console", false, "run as console application (windows only)")
+var fPlugins = flag.String("plugin-directory", "",
+	"path to directory containing external plugins")
+var fRunOnce = flag.Bool("once", false, "run one gather and exit")
 
 var (
-	nextVersion = "1.7.0"
-	version     string
-	commit      string
-	branch      string
+	version string
+	commit  string
+	branch  string
 )
 
-func init() {
-	// If commit or branch are not set, make that clear.
-	if commit == "" {
-		commit = "unknown"
-	}
-	if branch == "" {
-		branch = "unknown"
-	}
-}
-
 var stop chan struct{}
 
 func reloadLoop(
-	stop chan struct{},
 	inputFilters []string,
 	outputFilters []string,
 	aggregatorFilters []string,
@@ -88,148 +88,151 @@ func reloadLoop(
 	for <-reload {
 		reload <- false
 
-		// If no other options are specified, load the config file and run.
-		c := config.NewConfig()
-		c.OutputFilters = outputFilters
-		c.InputFilters = inputFilters
-		err := c.LoadConfig(*fConfig)
-		if err != nil {
-			log.Fatal("E! " + err.Error())
-		}
+		ctx, cancel := context.WithCancel(context.Background())
 
-		if *fConfigDirectory != "" {
-			err = c.LoadDirectory(*fConfigDirectory)
-			if err != nil {
-				log.Fatal("E! " + err.Error())
-			}
-		}
-		if !*fTest && 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?")
-		}
-
-		if int64(c.Agent.Interval.Duration) <= 0 {
-			log.Fatalf("E! Agent interval must be positive, found %s",
-				c.Agent.Interval.Duration)
-		}
-
-		if int64(c.Agent.FlushInterval.Duration) <= 0 {
-			log.Fatalf("E! Agent flush_interval must be positive; found %s",
-				c.Agent.Interval.Duration)
-		}
-
-		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())
-			}
-			os.Exit(0)
-		}
-
-		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)
+		signals := make(chan os.Signal, 1)
+		signal.Notify(signals, os.Interrupt, syscall.SIGHUP,
+			syscall.SIGTERM, syscall.SIGINT)
 		go func() {
 			select {
 			case sig := <-signals:
-				if sig == os.Interrupt {
-					close(shutdown)
-				}
 				if sig == syscall.SIGHUP {
-					log.Printf("I! Reloading Telegraf config\n")
+					log.Printf("I! Reloading Telegraf config")
 					<-reload
 					reload <- true
-					close(shutdown)
 				}
+				cancel()
 			case <-stop:
-				close(shutdown)
+				cancel()
 			}
 		}()
 
-		log.Printf("I! Starting Telegraf %s\n", displayVersion())
-		log.Printf("I! Loaded inputs: %s", strings.Join(c.InputNames(), " "))
-		log.Printf("I! Loaded aggregators: %s", strings.Join(c.AggregatorNames(), " "))
-		log.Printf("I! Loaded processors: %s", strings.Join(c.ProcessorNames(), " "))
-		log.Printf("I! Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
-		log.Printf("I! Tags enabled: %s", c.ListTags())
-
-		if *fPidfile != "" {
-			f, err := os.OpenFile(*fPidfile, os.O_CREATE|os.O_WRONLY, 0644)
-			if err != nil {
-				log.Printf("E! Unable to create pidfile: %s", err)
-			} else {
-				fmt.Fprintf(f, "%d\n", os.Getpid())
-
-				f.Close()
-
-				defer func() {
-					err := os.Remove(*fPidfile)
-					if err != nil {
-						log.Printf("E! Unable to remove pidfile: %s", err)
-					}
-				}()
-			}
+		err := runAgent(ctx, inputFilters, outputFilters)
+		if err != nil && err != context.Canceled {
+			log.Fatalf("E! [telegraf] Error running agent: %v", err)
 		}
-
-		ag.Run(shutdown)
 	}
 }
 
+func runAgent(ctx context.Context,
+	inputFilters []string,
+	outputFilters []string,
+) error {
+	log.Printf("I! Starting Telegraf %s", version)
+
+	// If no other options are specified, load the config file and run.
+	c := config.NewConfig()
+	c.OutputFilters = outputFilters
+	c.InputFilters = inputFilters
+	err := c.LoadConfig(*fConfig)
+	if err != nil {
+		return err
+	}
+
+	if *fConfigDirectory != "" {
+		err = c.LoadDirectory(*fConfigDirectory)
+		if err != nil {
+			return err
+		}
+	}
+	if !*fTest && len(c.Outputs) == 0 {
+		return errors.New("Error: no outputs found, did you provide a valid config file?")
+	}
+	if *fPlugins == "" && len(c.Inputs) == 0 {
+		return errors.New("Error: no inputs found, did you provide a valid config file?")
+	}
+
+	if int64(c.Agent.Interval.Duration) <= 0 {
+		return fmt.Errorf("Agent interval must be positive, found %s",
+			c.Agent.Interval.Duration)
+	}
+
+	if int64(c.Agent.FlushInterval.Duration) <= 0 {
+		return fmt.Errorf("Agent flush_interval must be positive; found %s",
+			c.Agent.Interval.Duration)
+	}
+
+	ag, err := agent.NewAgent(c)
+	if err != nil {
+		return err
+	}
+
+	// Setup logging as configured.
+	logConfig := logger.LogConfig{
+		Debug:               ag.Config.Agent.Debug || *fDebug,
+		Quiet:               ag.Config.Agent.Quiet || *fQuiet,
+		LogTarget:           ag.Config.Agent.LogTarget,
+		Logfile:             ag.Config.Agent.Logfile,
+		RotationInterval:    ag.Config.Agent.LogfileRotationInterval,
+		RotationMaxSize:     ag.Config.Agent.LogfileRotationMaxSize,
+		RotationMaxArchives: ag.Config.Agent.LogfileRotationMaxArchives,
+	}
+
+	logger.SetupLogging(logConfig)
+
+	if *fRunOnce {
+		wait := time.Duration(*fTestWait) * time.Second
+		return ag.Once(ctx, wait)
+	}
+
+	if *fTest || *fTestWait != 0 {
+		wait := time.Duration(*fTestWait) * time.Second
+		return ag.Test(ctx, wait)
+	}
+
+	log.Printf("I! Loaded inputs: %s", strings.Join(c.InputNames(), " "))
+	log.Printf("I! Loaded aggregators: %s", strings.Join(c.AggregatorNames(), " "))
+	log.Printf("I! Loaded processors: %s", strings.Join(c.ProcessorNames(), " "))
+	log.Printf("I! Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
+	log.Printf("I! Tags enabled: %s", c.ListTags())
+
+	if *fPidfile != "" {
+		f, err := os.OpenFile(*fPidfile, os.O_CREATE|os.O_WRONLY, 0644)
+		if err != nil {
+			log.Printf("E! Unable to create pidfile: %s", err)
+		} else {
+			fmt.Fprintf(f, "%d\n", os.Getpid())
+
+			f.Close()
+
+			defer func() {
+				err := os.Remove(*fPidfile)
+				if err != nil {
+					log.Printf("E! Unable to remove pidfile: %s", err)
+				}
+			}()
+		}
+	}
+
+	return ag.Run(ctx)
+}
+
 func usageExit(rc int) {
 	fmt.Println(internal.Usage)
 	os.Exit(rc)
 }
 
-type program struct {
-	inputFilters      []string
-	outputFilters     []string
-	aggregatorFilters []string
-	processorFilters  []string
-}
+func formatFullVersion() string {
+	var parts = []string{"Telegraf"}
 
-func (p *program) Start(s service.Service) error {
-	go p.run()
-	return nil
-}
-func (p *program) run() {
-	stop = make(chan struct{})
-	reloadLoop(
-		stop,
-		p.inputFilters,
-		p.outputFilters,
-		p.aggregatorFilters,
-		p.processorFilters,
-	)
-}
-func (p *program) Stop(s service.Service) error {
-	close(stop)
-	return nil
-}
-
-func displayVersion() string {
-	if version == "" {
-		return fmt.Sprintf("v%s~%s", nextVersion, commit)
+	if version != "" {
+		parts = append(parts, version)
+	} else {
+		parts = append(parts, "unknown")
 	}
-	return "v" + version
+
+	if branch != "" || commit != "" {
+		if branch == "" {
+			branch = "unknown"
+		}
+		if commit == "" {
+			commit = "unknown"
+		}
+		git := fmt.Sprintf("(git: %s %s)", branch, commit)
+		parts = append(parts, git)
+	}
+
+	return strings.Join(parts, " ")
 }
 
 func main() {
@@ -237,7 +240,10 @@ func main() {
 	flag.Parse()
 	args := flag.Args()
 
-	inputFilters, outputFilters := []string{}, []string{}
+	sectionFilters, inputFilters, outputFilters := []string{}, []string{}, []string{}
+	if *fSectionFilters != "" {
+		sectionFilters = strings.Split(":"+strings.TrimSpace(*fSectionFilters)+":", ":")
+	}
 	if *fInputFilters != "" {
 		inputFilters = strings.Split(":"+strings.TrimSpace(*fInputFilters)+":", ":")
 	}
@@ -253,6 +259,16 @@ func main() {
 		processorFilters = strings.Split(":"+strings.TrimSpace(*fProcessorFilters)+":", ":")
 	}
 
+	logger.SetupLogging(logger.LogConfig{})
+
+	// Load external plugins, if requested.
+	if *fPlugins != "" {
+		log.Printf("I! Loading external plugins from: %s", *fPlugins)
+		if err := goplugin.LoadExternalPlugins(*fPlugins); err != nil {
+			log.Fatal("E! " + err.Error())
+		}
+	}
+
 	if *pprofAddr != "" {
 		go func() {
 			pprofHostPort := *pprofAddr
@@ -273,10 +289,11 @@ func main() {
 	if len(args) > 0 {
 		switch args[0] {
 		case "version":
-			fmt.Printf("Telegraf %s (git: %s %s)\n", displayVersion(), branch, commit)
+			fmt.Println(formatFullVersion())
 			return
 		case "config":
 			config.PrintSampleConfig(
+				sectionFilters,
 				inputFilters,
 				outputFilters,
 				aggregatorFilters,
@@ -289,22 +306,33 @@ func main() {
 	// switch for flags which just do something and exit immediately
 	switch {
 	case *fOutputList:
-		fmt.Println("Available Output Plugins:")
-		for k, _ := range outputs.Outputs {
+		fmt.Println("Available Output Plugins: ")
+		names := make([]string, 0, len(outputs.Outputs))
+		for k := range outputs.Outputs {
+			names = append(names, k)
+		}
+		sort.Strings(names)
+		for _, k := range names {
 			fmt.Printf("  %s\n", k)
 		}
 		return
 	case *fInputList:
 		fmt.Println("Available Input Plugins:")
-		for k, _ := range inputs.Inputs {
+		names := make([]string, 0, len(inputs.Inputs))
+		for k := range inputs.Inputs {
+			names = append(names, k)
+		}
+		sort.Strings(names)
+		for _, k := range names {
 			fmt.Printf("  %s\n", k)
 		}
 		return
 	case *fVersion:
-		fmt.Printf("Telegraf %s (git: %s %s)\n", displayVersion(), branch, commit)
+		fmt.Println(formatFullVersion())
 		return
 	case *fSampleConfig:
 		config.PrintSampleConfig(
+			sectionFilters,
 			inputFilters,
 			outputFilters,
 			aggregatorFilters,
@@ -320,53 +348,20 @@ func main() {
 		return
 	}
 
-	if runtime.GOOS == "windows" && !(*fRunAsConsole) {
-		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{
-			inputFilters:      inputFilters,
-			outputFilters:     outputFilters,
-			aggregatorFilters: aggregatorFilters,
-			processorFilters:  processorFilters,
-		}
-		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}
-			}
-			if *fConfigDirectory != "" {
-				(*svcConfig).Arguments = append((*svcConfig).Arguments, "--config-directory", *fConfigDirectory)
-			}
-			err := service.Control(s, *fService)
-			if err != nil {
-				log.Fatal("E! " + err.Error())
-			}
-			os.Exit(0)
-		} else {
-			err = s.Run()
-			if err != nil {
-				log.Println("E! " + err.Error())
-			}
-		}
-	} else {
-		stop = make(chan struct{})
-		reloadLoop(
-			stop,
-			inputFilters,
-			outputFilters,
-			aggregatorFilters,
-			processorFilters,
-		)
+	shortVersion := version
+	if shortVersion == "" {
+		shortVersion = "unknown"
 	}
+
+	// Configure version
+	if err := internal.SetVersion(shortVersion); err != nil {
+		log.Println("Telegraf version already configured to: " + internal.Version())
+	}
+
+	run(
+		inputFilters,
+		outputFilters,
+		aggregatorFilters,
+		processorFilters,
+	)
 }

cmd/telegraf/telegraf_posix.go

@@ -0,0 +1,13 @@
+// +build !windows
+
+package main
+
+func run(inputFilters, outputFilters, aggregatorFilters, processorFilters []string) {
+	stop = make(chan struct{})
+	reloadLoop(
+		inputFilters,
+		outputFilters,
+		aggregatorFilters,
+		processorFilters,
+	)
+}

cmd/telegraf/telegraf_windows.go

@@ -0,0 +1,124 @@
+// +build windows
+
+package main
+
+import (
+	"log"
+	"os"
+	"runtime"
+
+	"github.com/influxdata/telegraf/logger"
+	"github.com/kardianos/service"
+)
+
+func run(inputFilters, outputFilters, aggregatorFilters, processorFilters []string) {
+	if runtime.GOOS == "windows" && windowsRunAsService() {
+		runAsWindowsService(
+			inputFilters,
+			outputFilters,
+			aggregatorFilters,
+			processorFilters,
+		)
+	} else {
+		stop = make(chan struct{})
+		reloadLoop(
+			inputFilters,
+			outputFilters,
+			aggregatorFilters,
+			processorFilters,
+		)
+	}
+}
+
+type program struct {
+	inputFilters      []string
+	outputFilters     []string
+	aggregatorFilters []string
+	processorFilters  []string
+}
+
+func (p *program) Start(s service.Service) error {
+	go p.run()
+	return nil
+}
+func (p *program) run() {
+	stop = make(chan struct{})
+	reloadLoop(
+		p.inputFilters,
+		p.outputFilters,
+		p.aggregatorFilters,
+		p.processorFilters,
+	)
+}
+func (p *program) Stop(s service.Service) error {
+	close(stop)
+	return nil
+}
+
+func runAsWindowsService(inputFilters, outputFilters, aggregatorFilters, processorFilters []string) {
+	programFiles := os.Getenv("ProgramFiles")
+	if programFiles == "" { // Should never happen
+		programFiles = "C:\\Program Files"
+	}
+	svcConfig := &service.Config{
+		Name:        *fServiceName,
+		DisplayName: *fServiceDisplayName,
+		Description: "Collects data using a series of plugins and publishes it to " +
+			"another series of plugins.",
+		Arguments: []string{"--config", programFiles + "\\Telegraf\\telegraf.conf"},
+	}
+
+	prg := &program{
+		inputFilters:      inputFilters,
+		outputFilters:     outputFilters,
+		aggregatorFilters: aggregatorFilters,
+		processorFilters:  processorFilters,
+	}
+	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}
+		}
+		if *fConfigDirectory != "" {
+			svcConfig.Arguments = append(svcConfig.Arguments, "--config-directory", *fConfigDirectory)
+		}
+		//set servicename to service cmd line, to have a custom name after relaunch as a service
+		svcConfig.Arguments = append(svcConfig.Arguments, "--service-name", *fServiceName)
+
+		err := service.Control(s, *fService)
+		if err != nil {
+			log.Fatal("E! " + err.Error())
+		}
+		os.Exit(0)
+	} else {
+		winlogger, err := s.Logger(nil)
+		if err == nil {
+			//When in service mode, register eventlog target andd setup default logging to eventlog
+			logger.RegisterEventLogger(winlogger)
+			logger.SetupLogging(logger.LogConfig{LogTarget: logger.LogTargetEventlog})
+		}
+		err = s.Run()
+
+		if err != nil {
+			log.Println("E! " + err.Error())
+		}
+	}
+}
+
+// Return true if Telegraf should create a Windows service.
+func windowsRunAsService() bool {
+	if *fService != "" {
+		return true
+	}
+
+	if *fRunAsConsole {
+		return false
+	}
+
+	return !service.Interactive()
+}

config/aws/credentials.go

@@ -9,13 +9,14 @@ import (
 )
 
 type CredentialConfig struct {
-	Region    string
-	AccessKey string
-	SecretKey string
-	RoleARN   string
-	Profile   string
-	Filename  string
-	Token     string
+	Region      string
+	AccessKey   string
+	SecretKey   string
+	RoleARN     string
+	Profile     string
+	Filename    string
+	Token       string
+	EndpointURL string
 }
 
 func (c *CredentialConfig) Credentials() client.ConfigProvider {
@@ -28,7 +29,8 @@ func (c *CredentialConfig) Credentials() client.ConfigProvider {
 
 func (c *CredentialConfig) rootCredentials() client.ConfigProvider {
 	config := &aws.Config{
-		Region: aws.String(c.Region),
+		Region:   aws.String(c.Region),
+		Endpoint: &c.EndpointURL,
 	}
 	if c.AccessKey != "" || c.SecretKey != "" {
 		config.Credentials = credentials.NewStaticCredentials(c.AccessKey, c.SecretKey, c.Token)
@@ -42,7 +44,8 @@ func (c *CredentialConfig) rootCredentials() client.ConfigProvider {
 func (c *CredentialConfig) assumeCredentials() client.ConfigProvider {
 	rootCredentials := c.rootCredentials()
 	config := &aws.Config{
-		Region: aws.String(c.Region),
+		Region:   aws.String(c.Region),
+		Endpoint: &c.EndpointURL,
 	}
 	config.Credentials = stscreds.NewCredentials(rootCredentials, c.RoleARN)
 	return session.New(config)

config/config_test.go

@@ -5,14 +5,17 @@ import (
 	"testing"
 	"time"
 
-	"github.com/influxdata/telegraf/internal/models"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/models"
 	"github.com/influxdata/telegraf/plugins/inputs"
 	"github.com/influxdata/telegraf/plugins/inputs/exec"
+	"github.com/influxdata/telegraf/plugins/inputs/http_listener_v2"
 	"github.com/influxdata/telegraf/plugins/inputs/memcached"
 	"github.com/influxdata/telegraf/plugins/inputs/procstat"
+	httpOut "github.com/influxdata/telegraf/plugins/outputs/http"
 	"github.com/influxdata/telegraf/plugins/parsers"
-
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestConfig_LoadSingleInputWithEnvVars(t *testing.T) {
@@ -28,17 +31,17 @@ func TestConfig_LoadSingleInputWithEnvVars(t *testing.T) {
 
 	filter := models.Filter{
 		NameDrop:  []string{"metricname2"},
-		NamePass:  []string{"metricname1"},
+		NamePass:  []string{"metricname1", "ip_192.168.1.1_name"},
 		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"},
 			},
@@ -71,13 +74,13 @@ func TestConfig_LoadSingleInput(t *testing.T) {
 		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"},
 			},
@@ -117,13 +120,13 @@ func TestConfig_LoadDirectory(t *testing.T) {
 		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"},
 			},
@@ -143,7 +146,11 @@ func TestConfig_LoadDirectory(t *testing.T) {
 		"Testdata did not produce correct memcached metadata.")
 
 	ex := inputs.Inputs["exec"]().(*exec.Exec)
-	p, err := parsers.NewJSONParser("exec", nil, nil)
+	p, err := parsers.NewParser(&parsers.Config{
+		MetricName: "exec",
+		DataFormat: "json",
+		JSONStrict: true,
+	})
 	assert.NoError(t, err)
 	ex.SetParser(p)
 	ex.Command = "/usr/bin/myothercollector --foo=bar"
@@ -152,6 +159,11 @@ func TestConfig_LoadDirectory(t *testing.T) {
 		MeasurementSuffix: "_myothercollector",
 	}
 	eConfig.Tags = make(map[string]string)
+
+	exec := c.Inputs[1].Input.(*exec.Exec)
+	require.NotNil(t, exec.Log)
+	exec.Log = nil
+
 	assert.Equal(t, ex, c.Inputs[1].Input,
 		"Merged Testdata did not produce a correct exec struct.")
 	assert.Equal(t, eConfig, c.Inputs[1].Config,
@@ -174,3 +186,74 @@ func TestConfig_LoadDirectory(t *testing.T) {
 	assert.Equal(t, pConfig, c.Inputs[3].Config,
 		"Merged Testdata did not produce correct procstat metadata.")
 }
+
+func TestConfig_LoadSpecialTypes(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/special_types.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(c.Inputs))
+
+	inputHTTPListener, ok := c.Inputs[0].Input.(*http_listener_v2.HTTPListenerV2)
+	assert.Equal(t, true, ok)
+	// Tests telegraf duration parsing.
+	assert.Equal(t, internal.Duration{Duration: time.Second}, inputHTTPListener.WriteTimeout)
+	// Tests telegraf size parsing.
+	assert.Equal(t, internal.Size{Size: 1024 * 1024}, inputHTTPListener.MaxBodySize)
+	// Tests toml multiline basic strings.
+	assert.Equal(t, "/path/to/my/cert\n", inputHTTPListener.TLSCert)
+}
+
+func TestConfig_FieldNotDefined(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/invalid_field.toml")
+	require.Error(t, err, "invalid field name")
+	assert.Equal(t, "Error loading config file ./testdata/invalid_field.toml: Error parsing http_listener_v2, line 2: field corresponding to `not_a_field' is not defined in http_listener_v2.HTTPListenerV2", err.Error())
+
+}
+
+func TestConfig_WrongFieldType(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/wrong_field_type.toml")
+	require.Error(t, err, "invalid field type")
+	assert.Equal(t, "Error loading config file ./testdata/wrong_field_type.toml: Error parsing http_listener_v2, line 2: (http_listener_v2.HTTPListenerV2.Port) cannot unmarshal TOML string into int", err.Error())
+
+	c = NewConfig()
+	err = c.LoadConfig("./testdata/wrong_field_type2.toml")
+	require.Error(t, err, "invalid field type2")
+	assert.Equal(t, "Error loading config file ./testdata/wrong_field_type2.toml: Error parsing http_listener_v2, line 2: (http_listener_v2.HTTPListenerV2.Methods) cannot unmarshal TOML string into []string", err.Error())
+}
+
+func TestConfig_InlineTables(t *testing.T) {
+	// #4098
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/inline_table.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(c.Outputs))
+
+	outputHTTP, ok := c.Outputs[1].Output.(*httpOut.HTTP)
+	assert.Equal(t, true, ok)
+	assert.Equal(t, map[string]string{"Authorization": "Token $TOKEN", "Content-Type": "application/json"}, outputHTTP.Headers)
+	assert.Equal(t, []string{"org_id"}, c.Outputs[0].Config.Filter.TagInclude)
+}
+
+func TestConfig_SliceComment(t *testing.T) {
+	t.Skipf("Skipping until #3642 is resolved")
+
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/slice_comment.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(c.Outputs))
+
+	outputHTTP, ok := c.Outputs[0].Output.(*httpOut.HTTP)
+	assert.Equal(t, []string{"test"}, outputHTTP.Scopes)
+	assert.Equal(t, true, ok)
+}
+
+func TestConfig_BadOrdering(t *testing.T) {
+	// #3444: when not using inline tables, care has to be taken so subsequent configuration
+	// doesn't become part of the table. This is not a bug, but TOML syntax.
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/non_slice_slice.toml")
+	require.Error(t, err, "bad ordering")
+	assert.Equal(t, "Error loading config file ./testdata/non_slice_slice.toml: Error parsing http array, line 4: cannot unmarshal TOML array into string (need slice)", err.Error())
+}

config/testdata/inline_table.toml

@@ -0,0 +1,7 @@
+[[outputs.http]]
+    headers = { Authorization = "Token $TOKEN",Content-Type = "application/json" }
+    taginclude = ["org_id"]
+
+[[outputs.http]]
+    headers = { Authorization = "Token $TOKEN",Content-Type = "application/json" }
+    taginclude = ["org_id"]

config/testdata/invalid_field.toml

@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  not_a_field = true

config/testdata/non_slice_slice.toml

@@ -0,0 +1,4 @@
+[[outputs.http]]
+  [outputs.http.headers]
+    Content-Type = "application/json"
+  taginclude = ["org_id"]

config/testdata/single_plugin_env_vars.toml

@@ -1,6 +1,6 @@
 [[inputs.memcached]]
   servers = ["$MY_TEST_SERVER"]
-  namepass = ["metricname1"]
+  namepass = ["metricname1", "ip_${MY_TEST_SERVER}_name"]
   namedrop = ["metricname2"]
   fieldpass = ["some", "strings"]
   fielddrop = ["other", "stuff"]

config/testdata/slice_comment.toml

@@ -0,0 +1,5 @@
+[[outputs.http]]
+  scopes = [
+    # comment
+    "test" # comment
+  ]

config/testdata/special_types.toml

@@ -0,0 +1,9 @@
+[[inputs.http_listener_v2]]
+  write_timeout = "1s"
+  max_body_size = "1MiB"
+  tls_cert = """
+/path/to/my/cert
+"""
+  tls_key = '''
+/path/to/my/key
+'''

config/testdata/telegraf-agent.toml

@@ -256,7 +256,7 @@
   # specify address via a url matching:
   #   postgres://[pqgotest[:password]]@localhost[/dbname]?sslmode=[disable|verify-ca|verify-full]
   # or a simple string:
-  #   host=localhost user=pqotest password=... sslmode=... dbname=app_production
+  #   host=localhost user=pqgotest password=... sslmode=... dbname=app_production
   #
   # All connection parameters are optional. By default, the host is localhost
   # and the user is the currently running user. For localhost, we default

config/testdata/wrong_field_type.toml

@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  port = "80"

config/testdata/wrong_field_type2.toml

@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  methods = "POST"

config/types.go

@@ -0,0 +1,88 @@
+package config
+
+import (
+	"bytes"
+	"strconv"
+	"time"
+
+	"github.com/alecthomas/units"
+)
+
+// Duration is a time.Duration
+type Duration time.Duration
+
+// Size is an int64
+type Size int64
+
+// Number is a float
+type Number float64
+
+// UnmarshalTOML parses the duration from the TOML config file
+func (d Duration) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	// see if we can directly convert it
+	dur, err := time.ParseDuration(string(b))
+	if err == nil {
+		d = Duration(dur)
+		return nil
+	}
+
+	// Parse string duration, ie, "1s"
+	if uq, err := strconv.Unquote(string(b)); err == nil && len(uq) > 0 {
+		dur, err := time.ParseDuration(uq)
+		if err == nil {
+			d = Duration(dur)
+			return nil
+		}
+	}
+
+	// First try parsing as integer seconds
+	sI, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		dur := time.Second * time.Duration(sI)
+		d = Duration(dur)
+		return nil
+	}
+	// Second try parsing as float seconds
+	sF, err := strconv.ParseFloat(string(b), 64)
+	if err == nil {
+		dur := time.Second * time.Duration(sF)
+		d = Duration(dur)
+		return nil
+	}
+
+	return nil
+}
+
+func (s Size) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	val, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		s = Size(val)
+		return nil
+	}
+	uq, err := strconv.Unquote(string(b))
+	if err != nil {
+		return err
+	}
+	val, err = units.ParseStrictBytes(uq)
+	if err != nil {
+		return err
+	}
+	s = Size(val)
+	return nil
+}
+
+func (n Number) UnmarshalTOML(b []byte) error {
+	value, err := strconv.ParseFloat(string(b), 64)
+	if err != nil {
+		return err
+	}
+
+	n = Number(value)
+	return nil
+}

docker-compose.yml

@@ -17,19 +17,20 @@ services:
       - KAFKA_ADVERTISED_HOST_NAME=localhost
       - KAFKA_ADVERTISED_PORT=9092
       - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
-      - KAFKA_CREATE_TOPICS="test:1:1"
+      - KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
       - JAVA_OPTS="-Xms256m -Xmx256m"
     ports:
       - "9092:9092"
     depends_on:
       - zookeeper
   elasticsearch:
-    image: elasticsearch:5
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.2.0
     environment:
-    - JAVA_OPTS="-Xms256m -Xmx256m"
+    - "ES_JAVA_OPTS=-Xms256m -Xmx256m"
+    - discovery.type=single-node
+    - xpack.security.enabled=false
     ports:
       - "9200:9200"
-      - "9300:9300"
   mysql:
     image: mysql
     environment:
@@ -38,10 +39,19 @@ services:
       - "3306:3306"
   memcached:
     image: memcached
-    ports: 
+    ports:
       - "11211:11211"
+  pgbouncer:
+    image: mbentley/ubuntu-pgbouncer
+    environment:
+      - PG_ENV_POSTGRESQL_USER=pgbouncer
+      - PG_ENV_POSTGRESQL_PASS=pgbouncer
+    ports:
+      - "6432:6432"
   postgres:
     image: postgres:alpine
+    environment: 
+      - POSTGRES_HOST_AUTH_METHOD=trust
     ports:
       - "5432:5432"
   rabbitmq:
@@ -83,11 +93,10 @@ services:
     ports:
       - "4200:4200"
       - "4230:4230"
-      - "5432:5432"
+      - "6543:5432"
     command:
       - crate
       - -Cnetwork.host=0.0.0.0
       - -Ctransport.host=localhost
-      - -Clicense.enterprise=false
     environment:
       - CRATE_HEAP_SIZE=128m

docs/AGGREGATORS.md

@@ -0,0 +1,132 @@
+### 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][] 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
+  plugin can be configured. This is included in `telegraf config`.  Please
+  consult the [SampleConfig][] page for the latest style guidelines.
+* 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.
+- Follow the recommended [CodeStyle][].
+
+### Aggregator Plugin 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) Init() error {
+	return nil
+}
+
+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()
+	})
+}
+```
+
+[telegraf.Aggregator]: https://godoc.org/github.com/influxdata/telegraf#Aggregator
+[SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle

docs/AGGREGATORS_AND_PROCESSORS.md

@@ -44,13 +44,15 @@ to control which metrics are passed through a processor or aggregator.  If a
 metric is filtered out the metric bypasses the plugin and is passed downstream
 to the next plugin.
 
-**Processor** plugins process metrics as they pass through and immediately emit
+### Processor
+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
+### Aggregator
+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_
+minimum, maximum, 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.
@@ -58,7 +60,8 @@ Since many users will only care about their aggregates and not every single metr
 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)
+Since aggregates are created for each measurement, field, and unique tag combination
+the plugin receives, you can make use of `taginclude` to group
+aggregates by specific tags only. 
+
+**Note:** Aggregator plugins only aggregate metrics within their periods (`now() - period`). Data with a timestamp earlier than `now() - period` cannot be included.

docs/CONFIGURATION.md

@@ -1,33 +1,25 @@
-# Telegraf Configuration
+# 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)
+Telegraf's configuration file is written using [TOML][] and is composed of
+three sections: [global tags][], [agent][] settings, and [plugins][].
 
-## Generating a Configuration File
+View the default [telegraf.conf][] config file with all available plugins.
 
-A default Telegraf config file can be auto-generated by telegraf:
+### Generating a Configuration File
 
-```
+A default config file can be generated by telegraf:
+```sh
 telegraf config > telegraf.conf
 ```
 
 To generate a file with specific inputs and outputs, you can use the
 --input-filter and --output-filter flags:
 
-```
+```sh
 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)
-
-When using the `.deb` or `.rpm` packages, you can define environment variables
-in the `/etc/default/telegraf` file.
-
-## Configuration file locations
+### Configuration Loading
 
 The location of the configuration file can be set via the `--config` command
 line flag.
@@ -40,180 +32,431 @@ On most systems, the default locations are `/etc/telegraf/telegraf.conf` for
 the main configuration file and `/etc/telegraf/telegraf.d` for the directory of
 configuration files.
 
-# Global Tags
+### Environment Variables
 
-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.
+Environment variables can be used anywhere in the config file, simply surround
+them with `${}`.  Replacement occurs before file parsing.   For strings
+the variable must be within quotes, e.g., `"${STR_VAR}"`, for numbers and booleans
+they should be unquoted, e.g., `${INT_VAR}`, `${BOOL_VAR}`.
 
-## Agent Configuration
+When using the `.deb` or `.rpm` packages, you can define environment variables
+in the `/etc/default/telegraf` file.
 
-Telegraf has a few options you can configure under the `[agent]` section of the
-config.
+**Example**:
 
-* **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 or when set to "0s", 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. It is up to each individual
-   service input to set the timestamp at the appropriate precision.
-   Valid time units are "ns", "us" (or "µs"), "ms", "s".
+`/etc/default/telegraf`:
+```
+USER="alice"
+INFLUX_URL="http://localhost:8086"
+INFLUX_SKIP_DATABASE_CREATION="true"
+INFLUX_PASSWORD="monkey123"
+```
 
-* **logfile**: Specify the log file name. The empty string means to log to stderr.
-* **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.
+`/etc/telegraf.conf`:
+```toml
+[global_tags]
+  user = "${USER}"
 
-## Input Configuration
+[[inputs.mem]]
 
-The following config parameters are available for all inputs:
+[[outputs.influxdb]]
+  urls = ["${INFLUX_URL}"]
+  skip_database_creation = ${INFLUX_SKIP_DATABASE_CREATION}
+  password = "${INFLUX_PASSWORD}"
+```
 
-* **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.
+The above files will produce the following effective configuration file to be
+parsed:
+```toml
+[global_tags]
+  user = "alice"
 
-The [measurement filtering](#measurement-filtering) parameters can be used to
-limit what metrics are emitted from the input plugin.
+[[outputs.influxdb]]
+  urls = "http://localhost:8086"
+  skip_database_creation = true
+  password = "monkey123"
+```
 
-## Output Configuration
+### Intervals
 
-The [measurement filtering](#measurement-filtering) parameters can be used to
-limit what metrics are emitted from the output plugin.
+Intervals are durations of time and can be specified for supporting settings by
+combining an integer value and time unit as a string value.  Valid time units are
+`ns`, `us` (or `µs`), `ms`, `s`, `m`, `h`.
+```toml
+[agent]
+  interval = "10s"
+```
 
-## Aggregator Configuration
+### Global Tags
 
-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.
-
-The [measurement filtering](#measurement-filtering) parameters can be used to
-limit what metrics are handled by the aggregator.  Excluded metrics are passed
-downstream to the next aggregator.
-
-## 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.
-
-The [measurement filtering](#measurement-filtering) parameters can be used
-to limit what metrics are handled by the processor.  Excluded metrics are
-passed downstream to the next processor.
-
-#### Measurement Filtering
-
-Filters can be configured per input, output, processor, or aggregator,
-see below for examples.
-
-* **namepass**:
-An array of glob pattern strings.  Only points whose measurement name matches
-a pattern in this list are emitted.
-* **namedrop**:
-The inverse of `namepass`.  If a match is found the point is discarded. This
-is tested on points after they have passed the `namepass` test.
-* **fieldpass**:
-An array of glob pattern strings.  Only fields whose field key matches a
-pattern in this list are emitted.
-* **fielddrop**:
-The inverse of `fieldpass`.  Fields with a field key matching one of the
-patterns will be discarded from the point.  This is tested on points after
-they have passed the `fieldpass` test.
-* **tagpass**:
-A table mapping tag keys to arrays of glob pattern strings.  Only points
-that contain a tag key in the table and a tag value matching one of its
-patterns is emitted.
-* **tagdrop**:
-The inverse of `tagpass`.  If a match is found the point is discarded. This
-is tested on points after they have passed the `tagpass` test.
-* **taginclude**:
-An array of glob pattern strings.  Only tags with a tag key matching one of
-the patterns are emitted.  In contrast to `tagpass`, which will pass an entire
-point based on its tag, `taginclude` removes all non matching tags from the
-point.  This filter can be used on both inputs & outputs, but it is
-_recommended_ to be used on inputs, as it is more efficient to filter out tags
-at the ingestion point.
-* **tagexclude**:
-The inverse of `taginclude`. Tags with a tag key matching one of the patterns
-will be discarded from the point.
-
-**NOTE** Due to the way TOML is parsed, `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
-tables.
-
-#### 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_`.
+Global tags can be specified in the `[global_tags]` table in key="value"
+format. All metrics that are gathered will be tagged with the tags specified.
 
 ```toml
 [global_tags]
-  dc = "denver-1"
+  dc = "us-east-1"
+```
 
-[agent]
-  interval = "10s"
+### Agent
 
-# OUTPUTS
-[[outputs.influxdb]]
-  url = "http://192.168.59.103:8086" # required.
-  database = "telegraf" # required.
+The agent table configures Telegraf and the defaults used across all plugins.
+
+- **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 outputs in batches of at most
+  metric_batch_size metrics.
+  This controls the size of writes that Telegraf sends to output plugins.
+
+- **metric_buffer_limit**:
+  Maximum number of unwritten metrics per output.  Increasing this value
+  allows for longer periods of output downtime without dropping metrics at the
+  cost of higher maximum memory usage.
+
+- **collection_jitter**:
+  Collection jitter is used to jitter the collection by a random [interval][].
+  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 flushing [interval][] for all outputs. Maximum flush_interval will be
+  flush_interval + flush_jitter.
+
+- **flush_jitter**:
+  Default flush jitter for all outputs. This jitters 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.
+
+
+- **precision**:
+  Collected metrics are rounded to the precision specified as an [interval][].
+
+  Precision will NOT be used for service inputs. It is up to each individual
+  service input to set the timestamp at the appropriate precision.
+
+- **debug**:
+  Log at debug level.
+
+- **quiet**:
+  Log only error level messages.
+
+- **logtarget**:
+  Log target controls the destination for logs and can be one of "file",
+  "stderr" or, on Windows, "eventlog".  When set to "file", the output file is
+  determined by the "logfile" setting.
+
+- **logfile**:
+  Name of the file to be logged to when using the "file" logtarget.  If set to
+  the empty string then logs are written to stderr.
+
+
+- **logfile_rotation_interval**:
+  The logfile will be rotated after the time interval specified.  When set to
+  0 no time based rotation is performed.
+
+- **logfile_rotation_max_size**:
+  The logfile will be rotated when it becomes larger than the specified size.
+  When set to 0 no size based rotation is performed.
+
+- **logfile_rotation_max_archives**:
+  Maximum number of rotated archives to keep, any older logs are deleted.  If
+  set to -1, no archives are removed.
+
+- **hostname**:
+  Override default hostname, if empty use os.Hostname()
+- **omit_hostname**:
+  If set to true, do no set the "host" tag in the telegraf agent.
+
+### Plugins
+
+Telegraf plugins are divided into 4 types: [inputs][], [outputs][],
+[processors][], and [aggregators][].
+
+Unlike the `global_tags` and `agent` tables, any plugin can be defined
+multiple times and each instance will run independently.  This allows you to
+have plugins defined with differing configurations as needed within a single
+Telegraf process.
+
+Each plugin has a unique set of configuration options, reference the
+sample configuration for details.  Additionally, several options are available
+on any plugin depending on its type.
+
+### Input Plugins
+
+Input plugins gather and create metrics.  They support both polling and event
+driven operation.
+
+Parameters that can be used with any input plugin:
+
+- **alias**: Name an instance of a plugin.
+- **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.
+
+The [metric filtering][] parameters can be used to limit what metrics are
+emitted from the input plugin.
+
+#### Examples
+
+Use the name_suffix parameter to emit measurements with the name `cpu_total`:
+```toml
+[[inputs.cpu]]
+  name_suffix = "_total"
+  percpu = false
+  totalcpu = true
+```
+
+Use the name_override parameter to emit measurements with the name `foobar`:
+```toml
+[[inputs.cpu]]
+  name_override = "foobar"
+  percpu = false
+  totalcpu = true
+```
+
+Emit measurements with two additional tags: `tag1=foo` and `tag2=bar`
+
+> **NOTE**: With TOML, order matters.  Parameters belong to the last defined
+> table header, place `[inputs.cpu.tags]` table at the _end_ of the plugin
+> definition.
+```toml
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
+  [inputs.cpu.tags]
+    tag1 = "foo"
+    tag2 = "bar"
+```
+
+Utilize `name_override`, `name_prefix`, or `name_suffix` config options to
+avoid measurement collisions when defining multiple plugins:
+```toml
+[[inputs.cpu]]
+  percpu = false
+  totalcpu = true
 
-# INPUTS
 [[inputs.cpu]]
   percpu = true
   totalcpu = false
-  # filter all fields beginning with 'time_'
-  fielddrop = ["time_*"]
+  name_override = "percpu_usage"
+  fielddrop = ["cpu_time*"]
 ```
 
-#### Input Config: tagpass and tagdrop
+### Output Plugins
 
-**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.
+Output plugins write metrics to a location.  Outputs commonly write to
+databases, network services, and messaging systems.
 
+Parameters that can be used with any output plugin:
+
+- **alias**: Name an instance of a plugin.
+- **flush_interval**: The maximum time between flushes.  Use this setting to
+  override the agent `flush_interval` on a per plugin basis.
+- **flush_jitter**: The amount of time to jitter the flush interval.  Use this
+  setting to override the agent `flush_jitter` on a per plugin basis.
+- **metric_batch_size**: The maximum number of metrics to send at once.  Use
+  this setting to override the agent `metric_batch_size` on a per plugin basis.
+- **metric_buffer_limit**: The maximum number of unsent metrics to buffer.
+  Use this setting to override the agent `metric_buffer_limit` on a per plugin
+  basis.
+- **name_override**: Override the original name of the measurement.
+- **name_prefix**: Specifies a prefix to attach to the measurement name.
+- **name_suffix**: Specifies a suffix to attach to the measurement name.
+
+The [metric filtering][] parameters can be used to limit what metrics are
+emitted from the output plugin.
+
+#### Examples
+
+Override flush parameters for a single output:
+```toml
+[agent]
+  flush_interval = "10s"
+  flush_jitter = "5s"
+  metric_batch_size = 1000
+
+[[outputs.influxdb]]
+  urls = [ "http://example.org:8086" ]
+  database = "telegraf"
+
+[[outputs.file]]
+  files = [ "stdout" ]
+  flush_interval = "1s"
+  flush_jitter = "1s"
+  metric_batch_size = 10
+```
+
+### Processor Plugins
+
+Processor plugins perform processing tasks on metrics and are commonly used to
+rename or apply transformations to metrics.  Processors are applied after the
+input plugins and before any aggregator plugins.
+
+Parameters that can be used with any processor plugin:
+
+- **alias**: Name an instance of a plugin.
+- **order**: The order in which the processor(s) are executed. If this is not
+  specified then processor execution order will be random.
+
+The [metric filtering][] parameters can be used to limit what metrics are
+handled by the processor.  Excluded metrics are passed downstream to the next
+processor.
+
+#### Examples
+
+If the order processors are applied matters you must set order on all involved
+processors:
+```toml
+[[processors.rename]]
+  order = 1
+  [[processors.rename.replace]]
+    tag = "path"
+    dest = "resource"
+
+[[processors.strings]]
+  order = 2
+  [[processors.strings.trim_prefix]]
+    tag = "resource"
+    prefix = "/api/"
+```
+
+### Aggregator Plugins
+
+Aggregator plugins produce new metrics after examining metrics over a time
+period, as the name suggests they are commonly used to produce new aggregates
+such as mean/max/min metrics.  Aggregators operate on metrics after any
+processors have been applied.
+
+Parameters that can be used with any aggregator plugin:
+
+- **alias**: Name an instance of a plugin.
+- **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.
+- **grace**: The duration when the metrics will still be aggregated
+  by the plugin, even though they're outside of the aggregation period. This
+  is needed in a situation when the agent is expected to receive late metrics
+  and it's acceptable to roll them up into next aggregation period.
+- **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.
+
+The [metric filtering][] parameters can be used to limit what metrics are
+handled by the aggregator.  Excluded metrics are passed downstream to the next
+aggregator.
+
+#### Examples
+
+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"]
+```
+
+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"]
+```
+
+<a id="measurement-filtering"></a>
+### Metric Filtering
+
+Metric filtering can be configured per plugin on any input, output, processor,
+and aggregator plugin.  Filters fall under two categories: Selectors and
+Modifiers.
+
+#### Selectors
+
+Selector filters include or exclude entire metrics.  When a metric is excluded
+from a Input or an Output plugin, the metric is dropped.  If a metric is
+excluded from a Processor or Aggregator plugin, it is skips the plugin and is
+sent onwards to the next stage of processing.
+
+- **namepass**:
+An array of glob pattern strings.  Only metrics whose measurement name matches
+a pattern in this list are emitted.
+
+- **namedrop**:
+The inverse of `namepass`.  If a match is found the metric is discarded. This
+is tested on metrics after they have passed the `namepass` test.
+
+- **tagpass**:
+A table mapping tag keys to arrays of glob pattern strings.  Only metrics
+that contain a tag key in the table and a tag value matching one of its
+patterns is emitted.
+
+- **tagdrop**:
+The inverse of `tagpass`.  If a match is found the metric is discarded. This
+is tested on metrics after they have passed the `tagpass` test.
+
+#### Modifiers
+
+Modifier filters remove tags and fields from a metric.  If all fields are
+removed the metric is removed.
+
+- **fieldpass**:
+An array of glob pattern strings.  Only fields whose field key matches a
+pattern in this list are emitted.
+
+- **fielddrop**:
+The inverse of `fieldpass`.  Fields with a field key matching one of the
+patterns will be discarded from the metric.  This is tested on metrics after
+they have passed the `fieldpass` test.
+
+- **taginclude**:
+An array of glob pattern strings.  Only tags with a tag key matching one of
+the patterns are emitted.  In contrast to `tagpass`, which will pass an entire
+metric based on its tag, `taginclude` removes all non matching tags from the
+metric.  Any tag can be filtered including global tags and the agent `host`
+tag.
+
+- **tagexclude**:
+The inverse of `taginclude`. Tags with a tag key matching one of the patterns
+will be discarded from the metric.  Any tag can be filtered including global
+tags and the agent `host` tag.
+
+#### Filtering Examples
+
+##### Using tagpass and tagdrop:
 ```toml
 [[inputs.cpu]]
   percpu = true
@@ -231,10 +474,22 @@ interpreted as part of the tagpass/tagdrop map.
     fstype = [ "ext4", "xfs" ]
     # Globs can also be used on the tag values
     path = [ "/opt", "/home*" ]
+
+[[inputs.win_perf_counters]]
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "Network Interface"
+    Instances = ["*"]
+    Counters = [
+      "Bytes Received/sec",
+      "Bytes Sent/sec"
+    ]
+    Measurement = "win_net"
+  # Don't send metrics where the Windows interface name (instance) begins with isatap or Local
+  [inputs.win_perf_counters.tagdrop]
+    instance = ["isatap*", "Local*"]
 ```
 
-#### Input Config: fieldpass and fielddrop
-
+##### Using fieldpass and fielddrop:
 ```toml
 # Drop all metrics for guest & steal CPU usage
 [[inputs.cpu]]
@@ -247,8 +502,7 @@ interpreted as part of the tagpass/tagdrop map.
   fieldpass = ["inodes*"]
 ```
 
-#### Input Config: namepass and namedrop
-
+##### Using namepass and namedrop:
 ```toml
 # Drop all metrics about containers for kubelet
 [[inputs.prometheus]]
@@ -261,8 +515,7 @@ interpreted as part of the tagpass/tagdrop map.
   namepass = ["rest_client_*"]
 ```
 
-#### Input Config: taginclude and tagexclude
-
+##### Using taginclude and tagexclude:
 ```toml
 # Only include the "cpu" tag in the measurements for the cpu plugin.
 [[inputs.cpu]]
@@ -275,64 +528,7 @@ interpreted as part of the tagpass/tagdrop map.
   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:
-
+##### Metrics can be routed to different outputs using the metric name and tags:
 ```toml
 [[outputs.influxdb]]
   urls = [ "http://localhost:8086" ]
@@ -354,50 +550,43 @@ to avoid measurement collisions:
     cpu = ["cpu0"]
 ```
 
-#### Aggregator Configuration Examples:
+##### Routing metrics to different outputs based on the input.
 
-This will collect and emit the min/max of the system load1 metric every
-30s, dropping the originals.
+Metrics are tagged with `influxdb_database` in the input, which is then used to
+select the output.  The tag is removed in the outputs before writing.
 
 ```toml
-[[inputs.system]]
-  fieldpass = ["load1"] # collects system load1 metric.
+[[outputs.influxdb]]
+  urls = ["http://influxdb.example.com"]
+  database = "db_default"
+  [outputs.influxdb.tagdrop]
+    influxdb_database = ["*"]
 
-[[aggregators.minmax]]
-  period = "30s"        # send & clear the aggregate every 30s.
-  drop_original = true  # drop the original metrics.
+[[outputs.influxdb]]
+  urls = ["http://influxdb.example.com"]
+  database = "db_other"
+  tagexclude = ["influxdb_database"]
+  [outputs.influxdb.tagpass]
+    influxdb_database = ["other"]
 
-[[outputs.file]]
-  files = ["stdout"]
+[[inputs.disk]]
+  [inputs.disk.tags]
+    influxdb_database = "other"
 ```
 
-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.
+### Transport Layer Security (TLS)
 
-```toml
-[[inputs.swap]]
+Reference the detailed [TLS][] documentation.
 
-[[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"]
-```
-
-#### Processor Configuration Examples:
-
-Print only the metrics with `cpu` as the measurement name, all metrics are
-passed to the output:
-```toml
-[[processors.printer]]
-  namepass = "cpu"
-
-[[outputs.file]]
-  files = ["/tmp/metrics.out"]
-```
+[TOML]: https://github.com/toml-lang/toml#toml
+[global tags]: #global-tags
+[interval]: #intervals
+[agent]: #agent
+[plugins]: #plugins
+[inputs]: #input-plugins
+[outputs]: #output-plugins
+[processors]: #processor-plugins
+[aggregators]: #aggregator-plugins
+[metric filtering]: #metric-filtering
+[telegraf.conf]: /etc/telegraf.conf
+[TLS]: /docs/TLS.md

docs/DATA_FORMATS_INPUT.md

@@ -1,37 +1,24 @@
-# Telegraf Input Data Formats
+# Input Data Formats
 
-Telegraf is able to parse the following input data formats into metrics:
+Telegraf contains many general purpose plugins that support parsing input data
+using a configurable parser into [metrics][].  This allows, for example, the
+`kafka_consumer` input plugin to process messages in either InfluxDB Line
+Protocol or in JSON format.
 
-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)
-1. [Collectd](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#collectd)
-1. [Dropwizard](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#dropwizard)
+- [InfluxDB Line Protocol](/plugins/parsers/influx)
+- [Collectd](/plugins/parsers/collectd)
+- [CSV](/plugins/parsers/csv)
+- [Dropwizard](/plugins/parsers/dropwizard)
+- [Graphite](/plugins/parsers/graphite)
+- [Grok](/plugins/parsers/grok)
+- [JSON](/plugins/parsers/json)
+- [Logfmt](/plugins/parsers/logfmt)
+- [Nagios](/plugins/parsers/nagios)
+- [Value](/plugins/parsers/value), ie: 45 or "booyah"
+- [Wavefront](/plugins/parsers/wavefront)
 
-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:
+Any input plugin containing the `data_format` option can use it to select the
+desired parser:
 
 ```toml
 [[inputs.exec]]
@@ -46,610 +33,6 @@ example, in the exec plugin:
   ## 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 its 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 its 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 its 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 its 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 its 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 its 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"
-```
-
-# Collectd:
-
-The collectd format parses the collectd binary network protocol.  Tags are
-created for host, instance, type, and type instance.  All collectd values are
-added as float64 fields.
-
-For more information about the binary network protocol see
-[here](https://collectd.org/wiki/index.php/Binary_protocol).
-
-You can control the cryptographic settings with parser options.  Create an
-authentication file and set `collectd_auth_file` to the path of the file, then
-set the desired security level in `collectd_security_level`.
-
-Additional information including client setup can be found
-[here](https://collectd.org/wiki/index.php/Networking_introduction#Cryptographic_setup).
-
-You can also change the path to the typesdb or add additional typesdb using
-`collectd_typesdb`.
-
-#### Collectd Configuration:
-
-```toml
-[[inputs.socket_listener]]
-  service_address = "udp://127.0.0.1:25826"
-  name_prefix = "collectd_"
-
-  ## Data format to consume.
-  ## Each data format has its 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 = "collectd"
-
-  ## Authentication file for cryptographic security levels
-  collectd_auth_file = "/etc/collectd/auth_file"
-  ## One of none (default), sign, or encrypt
-  collectd_security_level = "encrypt"
-  ## Path of to TypesDB specifications
-  collectd_typesdb = ["/usr/share/collectd/types.db"]
-```
-
-# Dropwizard:
-
-The dropwizard format can parse the JSON representation of a single dropwizard metric registry. By default, tags are parsed from metric names as if they were actual influxdb line protocol keys (`measurement<,tag_set>`) which can be overriden by defining custom [measurement & tag templates](./DATA_FORMATS_INPUT.md#measurement--tag-templates). All field value types are supported, `string`, `number` and `boolean`.
-
-A typical JSON of a dropwizard metric registry:
-
-```json
-{
-	"version": "3.0.0",
-	"counters" : {
-		"measurement,tag1=green" : {
-			"count" : 1
-		}
-	},
-	"meters" : {
-		"measurement" : {
-			"count" : 1,
-			"m15_rate" : 1.0,
-			"m1_rate" : 1.0,
-			"m5_rate" : 1.0,
-			"mean_rate" : 1.0,
-			"units" : "events/second"
-		}
-	},
-	"gauges" : {
-		"measurement" : {
-			"value" : 1
-		}
-	},
-	"histograms" : {
-		"measurement" : {
-			"count" : 1,
-			"max" : 1.0,
-			"mean" : 1.0,
-			"min" : 1.0,
-			"p50" : 1.0,
-			"p75" : 1.0,
-			"p95" : 1.0,
-			"p98" : 1.0,
-			"p99" : 1.0,
-			"p999" : 1.0,
-			"stddev" : 1.0
-		}
-	},
-	"timers" : {
-		"measurement" : {
-			"count" : 1,
-			"max" : 1.0,
-			"mean" : 1.0,
-			"min" : 1.0,
-			"p50" : 1.0,
-			"p75" : 1.0,
-			"p95" : 1.0,
-			"p98" : 1.0,
-			"p99" : 1.0,
-			"p999" : 1.0,
-			"stddev" : 1.0,
-			"m15_rate" : 1.0,
-			"m1_rate" : 1.0,
-			"m5_rate" : 1.0,
-			"mean_rate" : 1.0,
-			"duration_units" : "seconds",
-			"rate_units" : "calls/second"
-		}
-	}
-}
-```
-
-Would get translated into 4 different measurements:
-
-```
-measurement,metric_type=counter,tag1=green count=1
-measurement,metric_type=meter count=1,m15_rate=1.0,m1_rate=1.0,m5_rate=1.0,mean_rate=1.0
-measurement,metric_type=gauge value=1
-measurement,metric_type=histogram count=1,max=1.0,mean=1.0,min=1.0,p50=1.0,p75=1.0,p95=1.0,p98=1.0,p99=1.0,p999=1.0
-measurement,metric_type=timer count=1,max=1.0,mean=1.0,min=1.0,p50=1.0,p75=1.0,p95=1.0,p98=1.0,p99=1.0,p999=1.0,stddev=1.0,m15_rate=1.0,m1_rate=1.0,m5_rate=1.0,mean_rate=1.0
-```
-
-You may also parse a dropwizard registry from any JSON document which contains a dropwizard registry in some inner field. 
-Eg. to parse the following JSON document:
-
-```json
-{
-	"time" : "2017-02-22T14:33:03.662+02:00",
-	"tags" : {
-		"tag1" : "green",
-		"tag2" : "yellow"
-	},
-	"metrics" : {
-		"counters" : 	{ 
-			"measurement" : {
-				"count" : 1
-			}
-		},
-		"meters" : {},
-		"gauges" : {},
-		"histograms" : {},
-		"timers" : {}
-	}
-}
-```
-and translate it into:
-
-```
-measurement,metric_type=counter,tag1=green,tag2=yellow count=1 1487766783662000000
-```
-
-you simply need to use the following additional configuration properties:
-
-```toml
-dropwizard_metric_registry_path = "metrics"
-dropwizard_time_path = "time"
-dropwizard_time_format = "2006-01-02T15:04:05Z07:00"
-dropwizard_tags_path = "tags"
-## tag paths per tag are supported too, eg.
-#[inputs.yourinput.dropwizard_tag_paths]
-#  tag1 = "tags.tag1"
-#  tag2 = "tags.tag2"
-```
-
-
-For more information about the dropwizard json format see
-[here](http://metrics.dropwizard.io/3.1.0/manual/json/).
-
-#### Dropwizard Configuration:
-
-```toml
-[[inputs.exec]]
-  ## Commands array
-  commands = ["curl http://localhost:8080/sys/metrics"]
-  timeout = "5s"
-
-  ## Data format to consume.
-  ## Each data format has its 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 = "dropwizard"
-
-  ## Used by the templating engine to join matched values when cardinality is > 1
-  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
-  ## By providing an empty template array, templating is disabled and measurements are parsed as influxdb line protocol keys (measurement<,tag_set>)
-  templates = []
-
-  ## You may use an appropriate [gjson path](https://github.com/tidwall/gjson#path-syntax) 
-  ## to locate the metric registry within the JSON document
-  # dropwizard_metric_registry_path = "metrics"
-  
-  ## You may use an appropriate [gjson path](https://github.com/tidwall/gjson#path-syntax) 
-  ## to locate the default time of the measurements within the JSON document
-  # dropwizard_time_path = "time"
-  # dropwizard_time_format = "2006-01-02T15:04:05Z07:00"
-  
-  ## You may use an appropriate [gjson path](https://github.com/tidwall/gjson#path-syntax) 
-  ## to locate the tags map within the JSON document
-  # dropwizard_tags_path = "tags"
-
-  ## You may even use tag paths per tag
-  # [inputs.exec.dropwizard_tag_paths]
-  #   tag1 = "tags.tag1"
-  #   tag2 = "tags.tag2"
-
-```
+[metrics]: /docs/METRICS.md

docs/DATA_FORMATS_OUTPUT.md

@@ -4,12 +4,17 @@ In addition to output specific data formats, Telegraf supports a set of
 standard data formats that may be selected from when configuring many output
 plugins.
 
-1. [InfluxDB Line Protocol](#influx)
-1. [JSON](#json)
-1. [Graphite](#graphite)
+1. [InfluxDB Line Protocol](/plugins/serializers/influx)
+1. [Carbon2](/plugins/serializers/carbon2)
+1. [Graphite](/plugins/serializers/graphite)
+1. [JSON](/plugins/serializers/json)
+1. [Prometheus](/plugins/serializers/prometheus)
+1. [SplunkMetric](/plugins/serializers/splunkmetric)
+1. [Wavefront](/plugins/serializers/wavefront)
 
 You will be able to identify the plugins with support 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.
@@ -21,191 +26,3 @@ You will be able to identify the plugins with support by the presence of a
   ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
   data_format = "influx"
 ```
-
-## Influx
-
-The `influx` data format outputs metrics using
-[InfluxDB Line Protocol](https://docs.influxdata.com/influxdb/latest/write_protocols/line_protocol_tutorial/).
-This is the recommended format unless another format is required for
-interoperability.
-
-### 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 its 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"
-
-  ## Maximum line length in bytes.  Useful only for debugging.
-  # influx_max_line_bytes = 0
-
-  ## When true, fields will be output in ascending lexical order.  Enabling
-  ## this option will result in decreased performance and is only recommended
-  ## when you need predictable ordering while debugging.
-  # influx_sort_fields = false
-
-  ## When true, Telegraf will output unsigned integers as unsigned values,
-  ## i.e.: `42u`.  You will need a version of InfluxDB supporting unsigned
-  ## integer values.  Enabling this option will result in field type errors if
-  ## existing data has been written.
-  # influx_uint_support = false
-```
-
-## Graphite
-
-The Graphite data format is translated from Telegraf Metrics using either the
-template pattern or tag support method.  You can select between the two
-methods using the [`graphite_tag_support`](#graphite-tag-support) option.  When set, the tag support
-method is used, otherwise the [`template` pattern](#template-pattern) is used.
-
-#### Template Pattern
-
-The `template` option describes how Telegraf traslates metrics into _dot_
-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.
-
-**Example Conversion**:
-
-```
-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
-```
-
-Fields with string values will be skipped.  Boolean fields will be converted
-to 1 (true) or 0 (false).
-
-#### Graphite Tag Support
-
-When the `graphite_tag_support` option is enabled, the template pattern is not
-used.  Instead, tags are encoded using
-[Graphite tag support](http://graphite.readthedocs.io/en/latest/tags.html)
-added in Graphite 1.1.  The `metric_path` is a combination of the optional
-`prefix` option, measurement name, and field name.
-
-The tag `name` is reserved by Graphite, any conflicting tags and will be encoded as `_name`.
-
-**Example Conversion**:
-```
-cpu,cpu=cpu-total,dc=us-east-1,host=tars usage_idle=98.09,usage_user=0.89 1455320660004257758
-=>
-cpu.usage_user;cpu=cpu-total;dc=us-east-1;host=tars 0.89 1455320690
-cpu.usage_idle;cpu=cpu-total;dc=us-east-1;host=tars 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 its 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 added to each graphite bucket
-  prefix = "telegraf"
-  ## Graphite template pattern
-  template = "host.tags.measurement.field"
-
-  ## Support Graphite tags, recommended to enable when using Graphite 1.1 or later.
-  # graphite_tag_support = false
-```
-
-## JSON
-
-The JSON output data format output for a single metric is in the
-form:
-```json
-{
-    "fields": {
-        "field_1": 30,
-        "field_2": 4,
-        "field_N": 59,
-        "n_images": 660
-    },
-    "name": "docker",
-    "tags": {
-        "host": "raynor"
-    },
-    "timestamp": 1458229140
-}
-```
-
-When an output plugin needs to emit multiple metrics at one time, it may use
-the batch format.  The use of batch format is determined by the plugin,
-reference the documentation for the specific plugin.
-```json
-{
-    "metrics": [
-        {
-            "fields": {
-                "field_1": 30,
-                "field_2": 4,
-                "field_N": 59,
-                "n_images": 660
-            },
-            "name": "docker",
-            "tags": {
-                "host": "raynor"
-            },
-            "timestamp": 1458229140
-        },
-        {
-            "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 its 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"
-
-  ## The resolution to use for the metric timestamp.  Must be a duration string
-  ## such as "1ns", "1us", "1ms", "10ms", "1s".  Durations are truncated to
-  ## the power of 10 less than the specified units.
-  json_timestamp_units = "1s"
-```

docs/FAQ.md

@@ -10,10 +10,13 @@ docker run --name telegraf
 	-v /etc:/hostfs/etc:ro
 	-v /proc:/hostfs/proc:ro
 	-v /sys:/hostfs/sys:ro
-	-v /var/run/utmp:/var/run/utmp:ro
+	-v /var:/hostfs/var:ro
+	-v /run:/hostfs/run:ro
 	-e HOST_ETC=/hostfs/etc
 	-e HOST_PROC=/hostfs/proc
 	-e HOST_SYS=/hostfs/sys
+	-e HOST_VAR=/hostfs/var
+	-e HOST_RUN=/hostfs/run
 	-e HOST_MOUNT_PREFIX=/hostfs
 	telegraf
 ```
@@ -40,6 +43,33 @@ If running as a service add the environment variable to `/etc/default/telegraf`:
 GODEBUG=netdns=cgo
 ```
 
+### Q: How can I manage series cardinality?
+
+High [series cardinality][], when not properly managed, can cause high load on
+your database.  Telegraf attempts to avoid creating series with high
+cardinality, but some monitoring workloads such as tracking containers are are
+inherently high cardinality.  These workloads can still be monitored, but care
+must be taken to manage cardinality growth.
+
+You can use the following techniques to avoid cardinality issues:
+
+- Use [metric filtering][] options to exclude unneeded measurements and tags.
+- Write to a database with an appropriate [retention policy][].
+- Limit series cardinality in your database using the
+  [max-series-per-database][] and [max-values-per-tag][] settings.
+- Consider using the [Time Series Index][tsi].
+- Monitor your databases using the [show cardinality][] commands.
+- Consult the [InfluxDB documentation][influx docs] for the most up-to-date techniques.
+
+[series cardinality]: https://docs.influxdata.com/influxdb/v1.7/concepts/glossary/#series-cardinality
+[metric filtering]: https://github.com/influxdata/telegraf/blob/master/docs/CONFIGURATION.md#metric-filtering
+[retention policy]: https://docs.influxdata.com/influxdb/latest/guides/downsampling_and_retention/
+[max-series-per-database]: https://docs.influxdata.com/influxdb/latest/administration/config/#max-series-per-database-1000000
+[max-values-per-tag]: https://docs.influxdata.com/influxdb/latest/administration/config/#max-values-per-tag-100000
+[tsi]: https://docs.influxdata.com/influxdb/latest/concepts/time-series-index/
+[show cardinality]: https://docs.influxdata.com/influxdb/latest/query_language/spec/#show-cardinality
+[influx docs]: https://docs.influxdata.com/influxdb/latest/
+
 ### Q: When will the next version be released?
 
 The latest release date estimate can be viewed on the

docs/INPUTS.md

@@ -0,0 +1,149 @@
+### 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 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 inputs.
+
+### Input Plugin Guidelines
+
+- A plugin must conform to the [telegraf.Input][] interface.
+- Input Plugins should call `inputs.Add` in their `init` function to register
+  themselves.  See below for a quick example.
+- 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 included in `telegraf config`.  Please
+  consult the [SampleConfig][] page for the latest style
+  guidelines.
+- The `Description` function should say in one line what this plugin does.
+- Follow the recommended [CodeStyle][].
+
+Let's say you've written a plugin that emits metrics about processes on the
+current host.
+
+### Input Plugin Example
+
+```go
+package simple
+
+// simple.go
+
+import (
+    "github.com/influxdata/telegraf"
+    "github.com/influxdata/telegraf/plugins/inputs"
+)
+
+type Simple struct {
+    Ok bool `toml:"ok"`
+}
+
+func (s *Simple) Description() string {
+    return "a demo plugin"
+}
+
+func (s *Simple) SampleConfig() string {
+    return `
+  ## Indicate if everything is fine
+  ok = true
+`
+}
+
+func (s *Simple) Init() error {
+	return nil
+}
+
+func (s *Simple) Gather(acc telegraf.Accumulator) error {
+    if s.Ok {
+        acc.AddFields("state", map[string]interface{}{"value": "pretty good"}, nil)
+    } else {
+        acc.AddFields("state", map[string]interface{}{"value": "not great"}, nil)
+    }
+
+    return nil
+}
+
+func init() {
+    inputs.Add("simple", func() telegraf.Input { return &Simple{} })
+}
+```
+
+### Development
+
+* Run `make static` followed by `make plugin-[pluginName]` to spin up a docker
+  dev environment using docker-compose.
+* ***[Optional]*** When developing a plugin, add a `dev` directory with a
+  `docker-compose.yml` and `telegraf.conf` as well as any other supporting
+  files, where sensible.
+
+### Typed Metrics
+
+In addition the the `AddFields` function, the accumulator also supports
+functions to add typed metrics: `AddGauge`, `AddCounter`, etc.  Metric types
+are ignored by the InfluxDB output, but can be used for other outputs, such as
+[prometheus][prom metric types].
+
+### Data Formats
+
+Some input plugins, such as the [exec][] plugin, can accept any supported
+[input data formats][].
+
+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.
+
+Add the following to the `SampleConfig()`:
+
+```toml
+  ## Data format to consume.
+  ## Each data format has its 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"
+```
+
+### Service Input Plugins
+
+This section is for developers who want to create new "service" collection
+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 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.
+
+To create a Service Input implement the [telegraf.ServiceInput][] interface.
+
+### Metric Tracking
+
+Metric Tracking provides a system to be notified when metrics have been
+successfully written to their outputs or otherwise discarded.  This allows
+inputs to be created that function as reliable queue consumers.
+
+To get started with metric tracking begin by calling `WithTracking` on the
+[telegraf.Accumulator][].  Add metrics using the `AddTrackingMetricGroup`
+function on the returned [telegraf.TrackingAccumulator][] and store the
+`TrackingID`.  The `Delivered()` channel will return a type with information
+about the final delivery status of the metric group.
+
+Check the [amqp_consumer][] for an example implementation.
+
+[exec]: https://github.com/influxdata/telegraf/tree/master/plugins/inputs/exec
+[amqp_consumer]: https://github.com/influxdata/telegraf/tree/master/plugins/inputs/amqp_consumer
+[prom metric types]: https://prometheus.io/docs/concepts/metric_types/
+[input data formats]: https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+[SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
+[telegraf.Input]: https://godoc.org/github.com/influxdata/telegraf#Input
+[telegraf.ServiceInput]: https://godoc.org/github.com/influxdata/telegraf#ServiceInput
+[telegraf.Accumulator]: https://godoc.org/github.com/influxdata/telegraf#Accumulator
+[telegraf.TrackingAccumulator]: https://godoc.org/github.com/influxdata/telegraf#Accumulator

docs/LICENSE_OF_DEPENDENCIES.md

@@ -3,110 +3,170 @@
 When distributed in a binary form, Telegraf may contain portions of the
 following works:
 
-- code.cloudfoundry.org/clock [APACHE](https://github.com/cloudfoundry/clock/blob/master/LICENSE)
-- collectd.org [MIT](https://github.com/collectd/go-collectd/blob/master/LICENSE)
-- github.com/aerospike/aerospike-client-go [APACHE](https://github.com/aerospike/aerospike-client-go/blob/master/LICENSE)
-- github.com/amir/raidman [PUBLIC DOMAIN](https://github.com/amir/raidman/blob/master/UNLICENSE)
-- github.com/armon/go-metrics [MIT](https://github.com/armon/go-metrics/blob/master/LICENSE)
-- github.com/aws/aws-sdk-go [APACHE](https://github.com/aws/aws-sdk-go/blob/master/LICENSE.txt)
-- github.com/beorn7/perks [MIT](https://github.com/beorn7/perks/blob/master/LICENSE)
-- github.com/boltdb/bolt [MIT](https://github.com/boltdb/bolt/blob/master/LICENSE)
-- github.com/bsm/sarama-cluster [MIT](https://github.com/bsm/sarama-cluster/blob/master/LICENSE)
-- github.com/cenkalti/backoff [MIT](https://github.com/cenkalti/backoff/blob/master/LICENSE)
-- github.com/chuckpreslar/rcon [MIT](https://github.com/chuckpreslar/rcon#license)
-- github.com/couchbase/go-couchbase [MIT](https://github.com/couchbase/go-couchbase/blob/master/LICENSE)
-- github.com/couchbase/gomemcached [MIT](https://github.com/couchbase/gomemcached/blob/master/LICENSE)
-- github.com/couchbase/goutils [MIT](https://github.com/couchbase/go-couchbase/blob/master/LICENSE)
-- github.com/dancannon/gorethink [APACHE](https://github.com/dancannon/gorethink/blob/master/LICENSE)
-- github.com/davecgh/go-spew [ISC](https://github.com/davecgh/go-spew/blob/master/LICENSE)
-- github.com/docker/docker [APACHE](https://github.com/docker/docker/blob/master/LICENSE)
-- github.com/docker/cli [APACHE](https://github.com/docker/cli/blob/master/LICENSE)
-- github.com/eapache/go-resiliency [MIT](https://github.com/eapache/go-resiliency/blob/master/LICENSE)
-- github.com/eapache/go-xerial-snappy [MIT](https://github.com/eapache/go-xerial-snappy/blob/master/LICENSE)
-- github.com/eapache/queue [MIT](https://github.com/eapache/queue/blob/master/LICENSE)
-- github.com/eclipse/paho.mqtt.golang [ECLIPSE](https://github.com/eclipse/paho.mqtt.golang/blob/master/LICENSE)
-- github.com/fsnotify/fsnotify [BSD](https://github.com/fsnotify/fsnotify/blob/master/LICENSE)
-- github.com/fsouza/go-dockerclient [BSD](https://github.com/fsouza/go-dockerclient/blob/master/LICENSE)
-- github.com/gobwas/glob [MIT](https://github.com/gobwas/glob/blob/master/LICENSE)
-- github.com/google/go-cmp [BSD](https://github.com/google/go-cmp/blob/master/LICENSE)
-- github.com/gogo/protobuf [BSD](https://github.com/gogo/protobuf/blob/master/LICENSE)
-- github.com/golang/protobuf [BSD](https://github.com/golang/protobuf/blob/master/LICENSE)
-- github.com/golang/snappy [BSD](https://github.com/golang/snappy/blob/master/LICENSE)
-- github.com/go-logfmt/logfmt [MIT](https://github.com/go-logfmt/logfmt/blob/master/LICENSE)
-- github.com/gorilla/mux [BSD](https://github.com/gorilla/mux/blob/master/LICENSE)
-- github.com/go-ini/ini [APACHE](https://github.com/go-ini/ini/blob/master/LICENSE)
-- github.com/go-ole/go-ole [MPL](http://mattn.mit-license.org/2013)
-- github.com/go-sql-driver/mysql [MPL](https://github.com/go-sql-driver/mysql/blob/master/LICENSE)
-- github.com/hailocab/go-hostpool [MIT](https://github.com/hailocab/go-hostpool/blob/master/LICENSE)
-- github.com/hashicorp/consul [MPL](https://github.com/hashicorp/consul/blob/master/LICENSE)
-- github.com/hashicorp/go-msgpack [BSD](https://github.com/hashicorp/go-msgpack/blob/master/LICENSE)
-- github.com/hashicorp/raft-boltdb [MPL](https://github.com/hashicorp/raft-boltdb/blob/master/LICENSE)
-- github.com/hashicorp/raft [MPL](https://github.com/hashicorp/raft/blob/master/LICENSE)
-- github.com/influxdata/tail [MIT](https://github.com/influxdata/tail/blob/master/LICENSE.txt)
-- github.com/influxdata/toml [MIT](https://github.com/influxdata/toml/blob/master/LICENSE)
-- github.com/influxdata/go-syslog [MIT](https://github.com/influxdata/go-syslog/blob/develop/LICENSE)
-- github.com/influxdata/wlog [MIT](https://github.com/influxdata/wlog/blob/master/LICENSE)
-- github.com/jackc/pgx [MIT](https://github.com/jackc/pgx/blob/master/LICENSE)
-- github.com/jmespath/go-jmespath [APACHE](https://github.com/jmespath/go-jmespath/blob/master/LICENSE)
-- github.com/kardianos/osext [BSD](https://github.com/kardianos/osext/blob/master/LICENSE)
-- github.com/kardianos/service [ZLIB](https://github.com/kardianos/service/blob/master/LICENSE) (License not named but matches word for word with ZLib)
-- github.com/kballard/go-shellquote [MIT](https://github.com/kballard/go-shellquote/blob/master/LICENSE)
-- github.com/lib/pq [MIT](https://github.com/lib/pq/blob/master/LICENSE.md)
-- github.com/matttproud/golang_protobuf_extensions [APACHE](https://github.com/matttproud/golang_protobuf_extensions/blob/master/LICENSE)
-- github.com/Microsoft/ApplicationInsights-Go [APACHE](https://github.com/Microsoft/ApplicationInsights-Go/blob/master/LICENSE)
-- github.com/Microsoft/go-winio [MIT](https://github.com/Microsoft/go-winio/blob/master/LICENSE)
-- github.com/miekg/dns [BSD](https://github.com/miekg/dns/blob/master/LICENSE)
-- github.com/naoina/go-stringutil [MIT](https://github.com/naoina/go-stringutil/blob/master/LICENSE)
-- github.com/naoina/toml [MIT](https://github.com/naoina/toml/blob/master/LICENSE)
-- github.com/nats-io/gnatsd [MIT](https://github.com/nats-io/gnatsd/blob/master/LICENSE)
-- github.com/nats-io/go-nats [MIT](https://github.com/nats-io/go-nats/blob/master/LICENSE)
-- github.com/nats-io/nats [MIT](https://github.com/nats-io/nats/blob/master/LICENSE)
-- github.com/nats-io/nuid [MIT](https://github.com/nats-io/nuid/blob/master/LICENSE)
-- github.com/nsqio/go-nsq [MIT](https://github.com/nsqio/go-nsq/blob/master/LICENSE)
-- github.com/opentracing-contrib/go-observer [APACHE](https://github.com/opentracing-contrib/go-observer/blob/master/LICENSE)
-- github.com/opentracing/opentracing-go [MIT](https://github.com/opentracing/opentracing-go/blob/master/LICENSE)
-- github.com/openzipkin/zipkin-go-opentracing [MIT](https://github.com/openzipkin/zipkin-go-opentracing/blob/master/LICENSE)
-- github.com/pierrec/lz4 [BSD](https://github.com/pierrec/lz4/blob/master/LICENSE)
-- github.com/pierrec/xxHash [BSD](https://github.com/pierrec/xxHash/blob/master/LICENSE)
-- github.com/pkg/errors [BSD](https://github.com/pkg/errors/blob/master/LICENSE)
-- github.com/pmezard/go-difflib [BSD](https://github.com/pmezard/go-difflib/blob/master/LICENSE)
-- github.com/prometheus/client_golang [APACHE](https://github.com/prometheus/client_golang/blob/master/LICENSE)
-- github.com/prometheus/client_model [APACHE](https://github.com/prometheus/client_model/blob/master/LICENSE)
-- github.com/prometheus/common [APACHE](https://github.com/prometheus/common/blob/master/LICENSE)
-- github.com/prometheus/procfs [APACHE](https://github.com/prometheus/procfs/blob/master/LICENSE)
-- github.com/rcrowley/go-metrics [BSD](https://github.com/rcrowley/go-metrics/blob/master/LICENSE)
-- github.com/samuel/go-zookeeper [BSD](https://github.com/samuel/go-zookeeper/blob/master/LICENSE)
-- github.com/satori/go.uuid [MIT](https://github.com/satori/go.uuid/blob/master/LICENSE)
-- github.com/shirou/gopsutil [BSD](https://github.com/shirou/gopsutil/blob/master/LICENSE)
-- github.com/shirou/w32 [BSD](https://github.com/shirou/w32/blob/master/LICENSE)
-- github.com/Shopify/sarama [MIT](https://github.com/Shopify/sarama/blob/master/MIT-LICENSE)
-- github.com/Sirupsen/logrus [MIT](https://github.com/Sirupsen/logrus/blob/master/LICENSE)
-- github.com/StackExchange/wmi [MIT](https://github.com/StackExchange/wmi/blob/master/LICENSE)
-- github.com/stretchr/objx [MIT](https://github.com/stretchr/objx/blob/master/LICENSE.md)
-- github.com/soniah/gosnmp [BSD](https://github.com/soniah/gosnmp/blob/master/LICENSE)
-- github.com/streadway/amqp [BSD](https://github.com/streadway/amqp/blob/master/LICENSE)
-- github.com/stretchr/objx [MIT](https://github.com/stretchr/objx/blob/master/LICENSE.md)
-- github.com/stretchr/testify [MIT](https://github.com/stretchr/testify/blob/master/LICENCE.txt)
-- github.com/tidwall/gjson [MIT](https://github.com/tidwall/gjson/blob/master/LICENSE)
-- github.com/tidwall/match [MIT](https://github.com/tidwall/match/blob/master/LICENSE)
-- github.com/mitchellh/mapstructure [MIT](https://github.com/mitchellh/mapstructure/blob/master/LICENSE)
-- github.com/multiplay/go-ts3 [BSD](https://github.com/multiplay/go-ts3/blob/master/LICENSE)
-- github.com/vjeantet/grok [APACHE](https://github.com/vjeantet/grok/blob/master/LICENSE)
-- github.com/wvanbergen/kafka [MIT](https://github.com/wvanbergen/kafka/blob/master/LICENSE)
-- github.com/wvanbergen/kazoo-go [MIT](https://github.com/wvanbergen/kazoo-go/blob/master/MIT-LICENSE)
-- github.com/yuin/gopher-lua [MIT](https://github.com/yuin/gopher-lua/blob/master/LICENSE)
-- github.com/zensqlmonitor/go-mssqldb [BSD](https://github.com/zensqlmonitor/go-mssqldb/blob/master/LICENSE.txt)
-- golang.org/x/crypto [BSD](https://github.com/golang/crypto/blob/master/LICENSE)
-- golang.org/x/net [BSD](https://go.googlesource.com/net/+/master/LICENSE)
-- golang.org/x/text [BSD](https://go.googlesource.com/text/+/master/LICENSE)
-- golang.org/x/sys [BSD](https://go.googlesource.com/sys/+/master/LICENSE)
-- google.golang.org/grpc [APACHE](https://github.com/google/grpc-go/blob/master/LICENSE)
-- google.golang.org/genproto [APACHE](https://github.com/google/go-genproto/blob/master/LICENSE)
-- gopkg.in/asn1-ber.v1 [MIT](https://github.com/go-asn1-ber/asn1-ber/blob/v1.2/LICENSE)
-- gopkg.in/dancannon/gorethink.v1 [APACHE](https://github.com/dancannon/gorethink/blob/v1.1.2/LICENSE)
-- gopkg.in/fatih/pool.v2 [MIT](https://github.com/fatih/pool/blob/v2.0.0/LICENSE)
-- gopkg.in/ldap.v2 [MIT](https://github.com/go-ldap/ldap/blob/v2.5.0/LICENSE)
-- gopkg.in/mgo.v2 [BSD](https://github.com/go-mgo/mgo/blob/v2/LICENSE)
-- gopkg.in/olivere/elastic.v5 [MIT](https://github.com/olivere/elastic/blob/v5.0.38/LICENSE)
-- gopkg.in/tomb.v1 [BSD](https://github.com/go-tomb/tomb/blob/v1/LICENSE)
-- gopkg.in/yaml.v2 [APACHE](https://github.com/go-yaml/yaml/blob/v2/LICENSE)
+- cloud.google.com/go [Apache License 2.0](https://github.com/googleapis/google-cloud-go/blob/master/LICENSE)
+- code.cloudfoundry.org/clock [Apache License 2.0](https://github.com/cloudfoundry/clock/blob/master/LICENSE)
+- collectd.org [MIT License](https://git.octo.it/?p=collectd.git;a=blob;f=COPYING;hb=HEAD)
+- github.com/Azure/azure-amqp-common-go [MIT License](https://github.com/Azure/azure-amqp-common-go/blob/master/LICENSE)
+- github.com/Azure/azure-event-hubs-go [MIT License](https://github.com/Azure/azure-event-hubs-go/blob/master/LICENSE)
+- github.com/Azure/azure-pipeline-go [MIT License](https://github.com/Azure/azure-pipeline-go/blob/master/LICENSE)
+- github.com/Azure/azure-sdk-for-go [Apache License 2.0](https://github.com/Azure/azure-sdk-for-go/blob/master/LICENSE)
+- github.com/Azure/azure-storage-queue-go [MIT License](https://github.com/Azure/azure-storage-queue-go/blob/master/LICENSE)
+- github.com/Azure/go-amqp [MIT License](https://github.com/Azure/go-amqp/blob/master/LICENSE)
+- github.com/Azure/go-autorest [Apache License 2.0](https://github.com/Azure/go-autorest/blob/master/LICENSE)
+- github.com/Mellanox/rdmamap [Apache License 2.0](https://github.com/Mellanox/rdmamap/blob/master/LICENSE)
+- github.com/Microsoft/ApplicationInsights-Go [MIT License](https://github.com/Microsoft/ApplicationInsights-Go/blob/master/LICENSE)
+- github.com/Microsoft/go-winio [MIT License](https://github.com/Microsoft/go-winio/blob/master/LICENSE)
+- github.com/Shopify/sarama [MIT License](https://github.com/Shopify/sarama/blob/master/LICENSE)
+- github.com/StackExchange/wmi [MIT License](https://github.com/StackExchange/wmi/blob/master/LICENSE)
+- github.com/aerospike/aerospike-client-go [Apache License 2.0](https://github.com/aerospike/aerospike-client-go/blob/master/LICENSE)
+- github.com/alecthomas/units [MIT License](https://github.com/alecthomas/units/blob/master/COPYING)
+- github.com/amir/raidman [The Unlicense](https://github.com/amir/raidman/blob/master/UNLICENSE)
+- github.com/apache/thrift [Apache License 2.0](https://github.com/apache/thrift/blob/master/LICENSE)
+- github.com/aristanetworks/glog [Apache License 2.0](https://github.com/aristanetworks/glog/blob/master/LICENSE)
+- github.com/aristanetworks/goarista [Apache License 2.0](https://github.com/aristanetworks/goarista/blob/master/COPYING)
+- github.com/aws/aws-sdk-go [Apache License 2.0](https://github.com/aws/aws-sdk-go/blob/master/LICENSE.txt)
+- github.com/benbjohnson/clock [MIT License](https://github.com/benbjohnson/clock/blob/master/LICENSE)
+- github.com/beorn7/perks [MIT License](https://github.com/beorn7/perks/blob/master/LICENSE)
+- github.com/caio/go-tdigest [MIT License](https://github.com/caio/go-tdigest/blob/master/LICENSE)
+- github.com/cenkalti/backoff [MIT License](https://github.com/cenkalti/backoff/blob/master/LICENSE)
+- github.com/cespare/xxhash [MIT License](https://github.com/cespare/xxhash/blob/master/LICENSE.txt)
+- github.com/cisco-ie/nx-telemetry-proto [Apache License 2.0](https://github.com/cisco-ie/nx-telemetry-proto/blob/master/LICENSE)
+- github.com/couchbase/go-couchbase [MIT License](https://github.com/couchbase/go-couchbase/blob/master/LICENSE)
+- github.com/couchbase/gomemcached [MIT License](https://github.com/couchbase/gomemcached/blob/master/LICENSE)
+- github.com/couchbase/goutils [COUCHBASE INC. COMMUNITY EDITION LICENSE](https://github.com/couchbase/goutils/blob/master/LICENSE.md)
+- github.com/davecgh/go-spew [ISC License](https://github.com/davecgh/go-spew/blob/master/LICENSE)
+- github.com/denisenkom/go-mssqldb [BSD 3-Clause "New" or "Revised" License](https://github.com/denisenkom/go-mssqldb/blob/master/LICENSE.txt)
+- github.com/devigned/tab [MIT License](https://github.com/devigned/tab/blob/master/LICENSE)
+- github.com/dgrijalva/jwt-go [MIT License](https://github.com/dgrijalva/jwt-go/blob/master/LICENSE)
+- github.com/dimchansky/utfbom [Apache License 2.0](https://github.com/dimchansky/utfbom/blob/master/LICENSE)
+- github.com/docker/distribution [Apache License 2.0](https://github.com/docker/distribution/blob/master/LICENSE)
+- github.com/docker/docker [Apache License 2.0](https://github.com/docker/docker/blob/master/LICENSE)
+- github.com/docker/go-connections [Apache License 2.0](https://github.com/docker/go-connections/blob/master/LICENSE)
+- github.com/docker/go-units [Apache License 2.0](https://github.com/docker/go-units/blob/master/LICENSE)
+- github.com/docker/libnetwork [Apache License 2.0](https://github.com/docker/libnetwork/blob/master/LICENSE)
+- github.com/eapache/go-resiliency [MIT License](https://github.com/eapache/go-resiliency/blob/master/LICENSE)
+- github.com/eapache/go-xerial-snappy [MIT License](https://github.com/eapache/go-xerial-snappy/blob/master/LICENSE)
+- github.com/eapache/queue [MIT License](https://github.com/eapache/queue/blob/master/LICENSE)
+- github.com/eclipse/paho.mqtt.golang [Eclipse Public License - v 1.0](https://github.com/eclipse/paho.mqtt.golang/blob/master/LICENSE)
+- github.com/ericchiang/k8s [Apache License 2.0](https://github.com/ericchiang/k8s/blob/master/LICENSE)
+- github.com/ghodss/yaml [MIT License](https://github.com/ghodss/yaml/blob/master/LICENSE)
+- github.com/glinton/ping [MIT License](https://github.com/glinton/ping/blob/master/LICENSE)
+- github.com/go-logfmt/logfmt [MIT License](https://github.com/go-logfmt/logfmt/blob/master/LICENSE)
+- github.com/go-ole/go-ole [MIT License](https://github.com/go-ole/go-ole/blob/master/LICENSE)
+- github.com/go-redis/redis [BSD 2-Clause "Simplified" License](https://github.com/go-redis/redis/blob/master/LICENSE)
+- github.com/go-sql-driver/mysql [Mozilla Public License 2.0](https://github.com/go-sql-driver/mysql/blob/master/LICENSE)
+- github.com/goburrow/modbus [BSD 3-Clause "New" or "Revised" License](https://github.com/goburrow/modbus/blob/master/LICENSE)
+- github.com/goburrow/serial [MIT License](https://github.com/goburrow/serial/LICENSE)
+- github.com/gobwas/glob [MIT License](https://github.com/gobwas/glob/blob/master/LICENSE)
+- github.com/gofrs/uuid [MIT License](https://github.com/gofrs/uuid/blob/master/LICENSE)
+- github.com/gogo/protobuf [BSD 3-Clause Clear License](https://github.com/gogo/protobuf/blob/master/LICENSE)
+- github.com/golang/geo [Apache License 2.0](https://github.com/golang/geo/blob/master/LICENSE)
+- github.com/golang/groupcache [Apache License 2.0](https://github.com/golang/groupcache/blob/master/LICENSE)
+- github.com/golang/mock [Apache License 2.0](https://github.com/golang/mock/blob/master/LICENSE)
+- github.com/golang/protobuf [BSD 3-Clause "New" or "Revised" License](https://github.com/golang/protobuf/blob/master/LICENSE)
+- github.com/golang/snappy [BSD 3-Clause "New" or "Revised" License](https://github.com/golang/snappy/blob/master/LICENSE)
+- github.com/google/go-cmp [BSD 3-Clause "New" or "Revised" License](https://github.com/google/go-cmp/blob/master/LICENSE)
+- github.com/google/go-github [BSD 3-Clause "New" or "Revised" License](https://github.com/google/go-github/blob/master/LICENSE)
+- github.com/google/go-querystring [BSD 3-Clause "New" or "Revised" License](https://github.com/google/go-querystring/blob/master/LICENSE)
+- github.com/googleapis/gax-go [BSD 3-Clause "New" or "Revised" License](https://github.com/googleapis/gax-go/blob/master/LICENSE)
+- github.com/gorilla/mux [BSD 3-Clause "New" or "Revised" License](https://github.com/gorilla/mux/blob/master/LICENSE)
+- github.com/hailocab/go-hostpool [MIT License](https://github.com/hailocab/go-hostpool/blob/master/LICENSE)
+- github.com/harlow/kinesis-consumer [MIT License](https://github.com/harlow/kinesis-consumer/blob/master/MIT-LICENSE)
+- github.com/hashicorp/consul [Mozilla Public License 2.0](https://github.com/hashicorp/consul/blob/master/LICENSE)
+- github.com/hashicorp/go-cleanhttp [Mozilla Public License 2.0](https://github.com/hashicorp/go-cleanhttp/blob/master/LICENSE)
+- github.com/hashicorp/go-rootcerts [Mozilla Public License 2.0](https://github.com/hashicorp/go-rootcerts/blob/master/LICENSE)
+- github.com/hashicorp/go-uuid [Mozilla Public License 2.0](https://github.com/hashicorp/go-uuid/LICENSE)
+- github.com/hashicorp/serf [Mozilla Public License 2.0](https://github.com/hashicorp/serf/blob/master/LICENSE)
+- github.com/influxdata/go-syslog [MIT License](https://github.com/influxdata/go-syslog/blob/develop/LICENSE)
+- github.com/influxdata/tail [MIT License](https://github.com/influxdata/tail/blob/master/LICENSE.txt)
+- github.com/influxdata/toml [MIT License](https://github.com/influxdata/toml/blob/master/LICENSE)
+- github.com/influxdata/wlog [MIT License](https://github.com/influxdata/wlog/blob/master/LICENSE)
+- github.com/jackc/pgx [MIT License](https://github.com/jackc/pgx/blob/master/LICENSE)
+- github.com/jcmturner/gofork [BSD 3-Clause "New" or "Revised" License](https://github.com/jcmturner/gofork/blob/master/LICENSE)
+- github.com/jmespath/go-jmespath [Apache License 2.0](https://github.com/jmespath/go-jmespath/blob/master/LICENSE)
+- github.com/jpillora/backoff [MIT License](https://github.com/jpillora/backoff/blob/master/LICENSE)
+- github.com/kardianos/service [zlib License](https://github.com/kardianos/service/blob/master/LICENSE)
+- github.com/karrick/godirwalk [BSD 2-Clause "Simplified" License](https://github.com/karrick/godirwalk/blob/master/LICENSE)
+- github.com/kballard/go-shellquote [MIT License](https://github.com/kballard/go-shellquote/blob/master/LICENSE)
+- github.com/klauspost/compress [BSD 3-Clause Clear License](https://github.com/klauspost/compress/blob/master/LICENSE)
+- github.com/konsorten/go-windows-terminal-sequences [MIT License](https://github.com/konsorten/go-windows-terminal-sequences/blob/master/LICENSE)
+- github.com/kubernetes/apimachinery [Apache License 2.0](https://github.com/kubernetes/apimachinery/blob/master/LICENSE)
+- github.com/leodido/ragel-machinery [MIT License](https://github.com/leodido/ragel-machinery/blob/develop/LICENSE)
+- github.com/mailru/easyjson [MIT License](https://github.com/mailru/easyjson/blob/master/LICENSE)
+- github.com/matttproud/golang_protobuf_extensions [Apache License 2.0](https://github.com/matttproud/golang_protobuf_extensions/blob/master/LICENSE)
+- github.com/mdlayher/apcupsd [MIT License](https://github.com/mdlayher/apcupsd/blob/master/LICENSE.md)
+- github.com/mdlayher/genetlink [MIT License](https://github.com/mdlayher/genetlink/blob/master/LICENSE.md)
+- github.com/mdlayher/netlink [MIT License](https://github.com/mdlayher/netlink/blob/master/LICENSE.md)
+- github.com/miekg/dns [BSD 3-Clause Clear License](https://github.com/miekg/dns/blob/master/LICENSE)
+- github.com/mitchellh/go-homedir [MIT License](https://github.com/mitchellh/go-homedir/blob/master/LICENSE)
+- github.com/mitchellh/mapstructure [MIT License](https://github.com/mitchellh/mapstructure/blob/master/LICENSE)
+- github.com/multiplay/go-ts3 [BSD 2-Clause "Simplified" License](https://github.com/multiplay/go-ts3/blob/master/LICENSE)
+- github.com/naoina/go-stringutil [MIT License](https://github.com/naoina/go-stringutil/blob/master/LICENSE)
+- github.com/nats-io/jwt [Apache License 2.0](https://github.com/nats-io/jwt/blob/master/LICENSE)
+- github.com/nats-io/nats-server [Apache License 2.0](https://github.com/nats-io/nats-server/blob/master/LICENSE)
+- github.com/nats-io/nats.go [Apache License 2.0](https://github.com/nats-io/nats.go/blob/master/LICENSE)
+- github.com/nats-io/nkeys [Apache License 2.0](https://github.com/nats-io/nkeys/blob/master/LICENSE)
+- github.com/nats-io/nuid [Apache License 2.0](https://github.com/nats-io/nuid/blob/master/LICENSE)
+- github.com/newrelic/newrelic-telemetry-sdk-go [Apache License 2.0](https://github.com/newrelic/newrelic-telemetry-sdk-go/blob/master/LICENSE.md)
+- github.com/nsqio/go-nsq [MIT License](https://github.com/nsqio/go-nsq/blob/master/LICENSE)
+- github.com/openconfig/gnmi [Apache License 2.0](https://github.com/openconfig/gnmi/blob/master/LICENSE)
+- github.com/opencontainers/go-digest [Apache License 2.0](https://github.com/opencontainers/go-digest/blob/master/LICENSE)
+- github.com/opencontainers/image-spec [Apache License 2.0](https://github.com/opencontainers/image-spec/blob/master/LICENSE)
+- github.com/openzipkin/zipkin-go-opentracing [MIT License](https://github.com/openzipkin/zipkin-go-opentracing/blob/master/LICENSE)
+- github.com/pierrec/lz4 [BSD 3-Clause "New" or "Revised" License](https://github.com/pierrec/lz4/blob/master/LICENSE)
+- github.com/pkg/errors [BSD 2-Clause "Simplified" License](https://github.com/pkg/errors/blob/master/LICENSE)
+- github.com/pmezard/go-difflib [BSD 3-Clause Clear License](https://github.com/pmezard/go-difflib/blob/master/LICENSE)
+- github.com/prometheus/client_golang [Apache License 2.0](https://github.com/prometheus/client_golang/blob/master/LICENSE)
+- github.com/prometheus/client_model [Apache License 2.0](https://github.com/prometheus/client_model/blob/master/LICENSE)
+- github.com/prometheus/common [Apache License 2.0](https://github.com/prometheus/common/blob/master/LICENSE)
+- github.com/prometheus/procfs [Apache License 2.0](https://github.com/prometheus/procfs/blob/master/LICENSE)
+- github.com/rcrowley/go-metrics [MIT License](https://github.com/rcrowley/go-metrics/blob/master/LICENSE)
+- github.com/safchain/ethtool [Apache License 2.0](https://github.com/safchain/ethtool/blob/master/LICENSE)
+- github.com/samuel/go-zookeeper [BSD 3-Clause Clear License](https://github.com/samuel/go-zookeeper/blob/master/LICENSE)
+- github.com/shirou/gopsutil [BSD 3-Clause Clear License](https://github.com/shirou/gopsutil/blob/master/LICENSE)
+- github.com/sirupsen/logrus [MIT License](https://github.com/sirupsen/logrus/blob/master/LICENSE)
+- github.com/soniah/gosnmp [BSD 2-Clause "Simplified" License](https://github.com/soniah/gosnmp/blob/master/LICENSE)
+- github.com/streadway/amqp [BSD 2-Clause "Simplified" License](https://github.com/streadway/amqp/blob/master/LICENSE)
+- github.com/stretchr/objx [MIT License](https://github.com/stretchr/objx/blob/master/LICENSE)
+- github.com/stretchr/testify [custom -- permissive](https://github.com/stretchr/testify/blob/master/LICENSE)
+- github.com/tidwall/gjson [MIT License](https://github.com/tidwall/gjson/blob/master/LICENSE)
+- github.com/tidwall/match [MIT License](https://github.com/tidwall/match/blob/master/LICENSE)
+- github.com/tidwall/pretty [MIT License](https://github.com/tidwall/pretty/blob/master/LICENSE)
+- github.com/vishvananda/netlink [Apache License 2.0](https://github.com/vishvananda/netlink/blob/master/LICENSE)
+- github.com/vishvananda/netns [Apache License 2.0](https://github.com/vishvananda/netns/blob/master/LICENSE)
+- github.com/vjeantet/grok [Apache License 2.0](https://github.com/vjeantet/grok/blob/master/LICENSE)
+- github.com/vmware/govmomi [Apache License 2.0](https://github.com/vmware/govmomi/blob/master/LICENSE.txt)
+- github.com/wavefronthq/wavefront-sdk-go [Apache License 2.0](https://github.com/wavefrontHQ/wavefront-sdk-go/blob/master/LICENSE)
+- github.com/wvanbergen/kafka [MIT License](https://github.com/wvanbergen/kafka/blob/master/LICENSE)
+- github.com/wvanbergen/kazoo-go [MIT License](https://github.com/wvanbergen/kazoo-go/blob/master/MIT-LICENSE)
+- github.com/yuin/gopher-lua [MIT License](https://github.com/yuin/gopher-lua/blob/master/LICENSE)
+- go.opencensus.io [Apache License 2.0](https://github.com/census-instrumentation/opencensus-go/blob/master/LICENSE)
+- golang.org/x/crypto [BSD 3-Clause Clear License](https://github.com/golang/crypto/blob/master/LICENSE)
+- golang.org/x/net [BSD 3-Clause Clear License](https://github.com/golang/net/blob/master/LICENSE)
+- golang.org/x/oauth2 [BSD 3-Clause "New" or "Revised" License](https://github.com/golang/oauth2/blob/master/LICENSE)
+- golang.org/x/sync [BSD 3-Clause "New" or "Revised" License](https://github.com/golang/sync/blob/master/LICENSE)
+- golang.org/x/sys [BSD 3-Clause Clear License](https://github.com/golang/sys/blob/master/LICENSE)
+- golang.org/x/text [BSD 3-Clause Clear License](https://github.com/golang/text/blob/master/LICENSE)
+- golang.org/x/time [BSD 3-Clause Clear License](https://github.com/golang/time/blob/master/LICENSE)
+- golang.zx2c4.com/wireguard [MIT License](https://github.com/WireGuard/wgctrl-go/blob/master/LICENSE.md)
+- golang.zx2c4.com/wireguard/wgctrl [MIT License](https://github.com/WireGuard/wgctrl-go/blob/master/LICENSE.md)
+- google.golang.org/api [BSD 3-Clause "New" or "Revised" License](https://github.com/googleapis/google-api-go-client/blob/master/LICENSE)
+- google.golang.org/genproto [Apache License 2.0](https://github.com/google/go-genproto/blob/master/LICENSE)
+- google.golang.org/grpc [Apache License 2.0](https://github.com/grpc/grpc-go/blob/master/LICENSE)
+- gopkg.in/asn1-ber.v1 [MIT License](https://github.com/go-asn1-ber/asn1-ber/blob/v1.3/LICENSE)
+- gopkg.in/fatih/pool.v2 [MIT License](https://github.com/fatih/pool/blob/v2.0.0/LICENSE)
+- gopkg.in/fsnotify.v1 [BSD 3-Clause "New" or "Revised" License](https://github.com/fsnotify/fsnotify/blob/v1.4.7/LICENSE)
+- gopkg.in/gorethink/gorethink.v3 [Apache License 2.0](https://github.com/rethinkdb/rethinkdb-go/blob/v3.0.5/LICENSE)
+- gopkg.in/inf.v0 [BSD 3-Clause "New" or "Revised" License](https://github.com/go-inf/inf/blob/v0.9.1/LICENSE)
+- gopkg.in/jcmturner/aescts.v1 [Apache License 2.0](https://github.com/jcmturner/aescts/blob/v1.0.1/LICENSE)
+- gopkg.in/jcmturner/dnsutils.v1 [Apache License 2.0](https://github.com/jcmturner/dnsutils/blob/v1.0.1/LICENSE)
+- gopkg.in/jcmturner/gokrb5.v7 [Apache License 2.0](https://github.com/jcmturner/gokrb5/tree/v7.5.0/LICENSE)
+- gopkg.in/jcmturner/rpc.v1 [Apache License 2.0](https://github.com/jcmturner/rpc/blob/v1.1.0/LICENSE)
+- gopkg.in/ldap.v3 [MIT License](https://github.com/go-ldap/ldap/blob/v3.1.7/LICENSE)
+- gopkg.in/mgo.v2 [BSD 2-Clause "Simplified" License](https://github.com/go-mgo/mgo/blob/v2/LICENSE)
+- gopkg.in/olivere/elastic.v5 [MIT License](https://github.com/olivere/elastic/blob/v5.0.76/LICENSE)
+- gopkg.in/tomb.v1 [BSD 3-Clause Clear License](https://github.com/go-tomb/tomb/blob/v1/LICENSE)
+- gopkg.in/yaml.v2 [Apache License 2.0](https://github.com/go-yaml/yaml/blob/v2.2.2/LICENSE)
+
+## telegraf used and modified code from these projects
+- github.com/DataDog/datadog-agent [Apache License 2.0](https://github.com/DataDog/datadog-agent/LICENSE)

docs/METRICS.md

@@ -0,0 +1,22 @@
+# Metrics
+
+Telegraf metrics are the internal representation used to model data during
+processing.  Metrics are closely based on InfluxDB's data model and contain
+four main components:
+
+- **Measurement Name**: Description and namespace for the metric.
+- **Tags**: Key/Value string pairs and usually used to identify the
+  metric.
+- **Fields**: Key/Value pairs that are typed and usually contain the
+  metric data.
+- **Timestamp**: Date and time associated with the fields.
+
+This metric type exists only in memory and must be converted to a concrete
+representation in order to be transmitted or viewed.  To achieve this we
+provide several [output data formats][] sometimes referred to as
+*serializers*.  Our default serializer converts to [InfluxDB Line
+Protocol][line protocol] which provides a high performance and one-to-one
+direct mapping from Telegraf metrics.
+
+[output data formats]: /docs/DATA_FORMATS_OUTPUT.md
+[line protocol]: /plugins/serializers/influx

docs/OUTPUTS.md

@@ -0,0 +1,114 @@
+### 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 Plugin Guidelines
+
+- An output must conform to the [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/influxdata/telegraf/plugins/outputs/all/all.go` file.
+- The `SampleConfig` function should return valid toml that describes how the
+  plugin can be configured. This is included in `telegraf config`.  Please
+  consult the [SampleConfig][] page for the latest style guidelines.
+- The `Description` function should say in one line what this output does.
+- Follow the recommended [CodeStyle][].
+
+### Output Plugin Example
+
+```go
+package simpleoutput
+
+// simpleoutput.go
+
+import (
+    "github.com/influxdata/telegraf"
+    "github.com/influxdata/telegraf/plugins/outputs"
+)
+
+type Simple struct {
+    Ok bool `toml:"ok"`
+}
+
+func (s *Simple) Description() string {
+    return "a demo output"
+}
+
+func (s *Simple) SampleConfig() string {
+    return `
+  ok = true
+`
+}
+
+func (s *Simple) Init() error {
+	return nil
+}
+
+func (s *Simple) Connect() error {
+    // Make a connection to the URL here
+    return nil
+}
+
+func (s *Simple) Close() error {
+    // Close connection to the URL here
+    return nil
+}
+
+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() telegraf.Output { return &Simple{} })
+}
+
+```
+
+## Data Formats
+
+Some output plugins, such as the [file][] plugin, can write in any supported
+[output data formats][].
+
+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()`:
+
+```toml
+  ## Data format to output.
+  ## Each data format has its 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"
+```
+
+## Flushing Metrics to Outputs
+
+Metrics are flushed to outputs when any of the following events happen:
+- `flush_interval + rand(flush_jitter)` has elapsed since start or the last flush interval
+- At least `metric_batch_size` count of metrics are waiting in the buffer
+- The telegraf process has received a SIGUSR1 signal
+
+Note that if the flush takes longer than the `agent.interval` to write the metrics
+to the output, you'll see a message saying the output `did not complete within its 
+flush interval`. This may mean your output is not keeping up with the flow of metrics, 
+and you may want to look into enabling compression, reducing the size of your metrics, 
+or investigate other reasons why the writes might be taking longer than expected.
+
+[file]: https://github.com/influxdata/telegraf/tree/master/plugins/inputs/file
+[output data formats]: https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
+[SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
+[telegraf.Output]: https://godoc.org/github.com/influxdata/telegraf#Output

docs/PROCESSORS.md

@@ -0,0 +1,69 @@
+### 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][] 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 the output of `telegraf
+  config`.
+- The `SampleConfig` function should return valid toml that describes how the
+  plugin can be configured. This is included in `telegraf config`.  Please
+  consult the [SampleConfig][] page for the latest style guidelines.
+* The `Description` function should say in one line what this processor does.
+- Follow the recommended [CodeStyle][].
+
+### Processor Plugin Example
+
+```go
+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) Init() error {
+	return nil
+}
+
+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{}
+	})
+}
+```
+
+[SampleConfig]: https://github.com/influxdata/telegraf/wiki/SampleConfig
+[CodeStyle]: https://github.com/influxdata/telegraf/wiki/CodeStyle
+[telegraf.Processor]: https://godoc.org/github.com/influxdata/telegraf#Processor

docs/README.md

@@ -0,0 +1,21 @@
+# Telegraf
+
+- Concepts
+  - [Metrics][metrics]
+  - [Input Data Formats][parsers]
+  - [Output Data Formats][serializers]
+  - [Aggregators & Processors][aggproc]
+- Administration
+  - [Configuration][conf]
+  - [Profiling][profiling]
+  - [Windows Service][winsvc]
+  - [FAQ][faq]
+
+[conf]: /docs/CONFIGURATION.md
+[metrics]: /docs/METRICS.md
+[parsers]: /docs/DATA_FORMATS_INPUT.md
+[serializers]: /docs/DATA_FORMATS_OUTPUT.md
+[aggproc]: /docs/AGGREGATORS_AND_PROCESSORS.md
+[profiling]: /docs/PROFILING.md
+[winsvc]: /docs/WINDOWS_SERVICE.md
+[faq]: /docs/FAQ.md

docs/TEMPLATE_PATTERN.md

@@ -0,0 +1,135 @@
+# Template Patterns
+
+Template patterns are a mini language that describes how a dot delimited
+string should be mapped to and from [metrics][].
+
+A template has the form:
+```
+"host.mytag.mytag.measurement.measurement.field*"
+```
+
+Where the following keywords can be set:
+
+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*`.
+
+### Examples
+
+#### 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
+```
+
+[metrics]: /docs/METRICS.md

docs/TLS.md

@@ -0,0 +1,105 @@
+# Transport Layer Security
+
+There is an ongoing effort to standardize TLS options across plugins.  When
+possible, plugins will provide the standard settings described below.  With the
+exception of the advanced configuration available TLS settings will be
+documented in the sample configuration.
+
+### Client Configuration
+
+For client TLS support we have the following options:
+```toml
+## Root certificates for verifying server certificates encoded in PEM format.
+# tls_ca = "/etc/telegraf/ca.pem"
+
+## The public and private keypairs for the client encoded in PEM format.  May
+## contain intermediate certificates.
+# tls_cert = "/etc/telegraf/cert.pem"
+# tls_key = "/etc/telegraf/key.pem"
+## Skip TLS verification.
+# insecure_skip_verify = false
+```
+
+### Server Configuration
+
+The server TLS configuration provides support for TLS mutual authentication:
+
+```toml
+## Set one or more allowed client CA certificate file names to
+## enable mutually authenticated TLS connections.
+# tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
+
+## Add service certificate and key.
+# tls_cert = "/etc/telegraf/cert.pem"
+# tls_key = "/etc/telegraf/key.pem"
+```
+
+#### Advanced Configuration
+
+For plugins using the standard server configuration you can also set several
+advanced settings.  These options are not included in the sample configuration
+for the interest of brevity.
+
+```toml
+## Define list of allowed ciphers suites.  If not defined the default ciphers
+## supported by Go will be used.
+##   ex: tls_cipher_suites = [
+## 	         "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305",
+## 	         "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305",
+## 	         "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+## 	         "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
+## 	         "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+## 	         "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
+## 	         "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256",
+## 	         "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
+## 	         "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
+## 	         "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
+## 	         "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
+## 	         "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
+## 	         "TLS_RSA_WITH_AES_128_GCM_SHA256",
+## 	         "TLS_RSA_WITH_AES_256_GCM_SHA384",
+## 	         "TLS_RSA_WITH_AES_128_CBC_SHA256",
+## 	         "TLS_RSA_WITH_AES_128_CBC_SHA",
+## 	         "TLS_RSA_WITH_AES_256_CBC_SHA"
+##       ]
+# tls_cipher_suites = []
+
+## Minimum TLS version that is acceptable.
+# tls_min_version = "TLS10"
+
+## Maximum SSL/TLS version that is acceptable.
+# tls_max_version = "TLS13"
+```
+
+Cipher suites for use with `tls_cipher_suites`:
+- `TLS_RSA_WITH_RC4_128_SHA`
+- `TLS_RSA_WITH_3DES_EDE_CBC_SHA`
+- `TLS_RSA_WITH_AES_128_CBC_SHA`
+- `TLS_RSA_WITH_AES_256_CBC_SHA`
+- `TLS_RSA_WITH_AES_128_CBC_SHA256`
+- `TLS_RSA_WITH_AES_128_GCM_SHA256`
+- `TLS_RSA_WITH_AES_256_GCM_SHA384`
+- `TLS_ECDHE_ECDSA_WITH_RC4_128_SHA`
+- `TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA`
+- `TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`
+- `TLS_ECDHE_RSA_WITH_RC4_128_SHA`
+- `TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA`
+- `TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA`
+- `TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA`
+- `TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256`
+- `TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256`
+- `TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256`
+- `TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256`
+- `TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`
+- `TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384`
+- `TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305`
+- `TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305`
+- `TLS_AES_128_GCM_SHA256`
+- `TLS_AES_256_GCM_SHA384`
+- `TLS_CHACHA20_POLY1305_SHA256`
+
+TLS versions for use with `tls_min_version` or `tls_max_version`:
+- `TLS10`
+- `TLS11`
+- `TLS12`
+- `TLS13`

docs/WINDOWS_SERVICE.md

@@ -46,8 +46,26 @@ Telegraf can manage its own service through the --service flag:
 | `telegraf.exe --service start`     | Start the telegraf service    |
 | `telegraf.exe --service stop`      | Stop the telegraf service     |
 
-Troubleshooting  common error #1067
+## Install multiple services
+
+Running multiple instances of Telegraf is seldom needed, as you can run
+multiple instances of each plugin and route metric flow using the metric
+filtering options.  However, if you do need to run multiple telegraf instances
+on a single system, you can install the service with the `--service-name` and
+`--service-display-name` flags to give the services unique names:
+
+```
+> C:\"Program Files"\Telegraf\telegraf.exe --service install --service-name telegraf-1 --service-display-name "Telegraf 1"
+> C:\"Program Files"\Telegraf\telegraf.exe --service install --service-name telegraf-2 --service-display-name "Telegraf 2"
+```
+
+## Troubleshooting
+
+When Telegraf runs as a Windows service, Telegraf logs messages to Windows events log before configuration file with logging settings is loaded.
+Check event log for an error reported by `telegraf` service in case of Telegraf service reports failure on its start: Event Viewer->Windows Logs->Application
+
+**Troubleshooting  common error #1067**
 
 When installing as service in Windows, always double check to specify full path of the config file, otherwise windows service will fail to start
 
- --config C:\"Program Files"\Telegraf\telegraf.conf
+ --config "C:\Program Files\Telegraf\telegraf.conf"

etc/telegraf_windows.conf

@@ -1,18 +1,26 @@
-# Telegraf configuration
-
+# 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.
+#
+# Environment variables can be used anywhere in this config file, simply surround
+# 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 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"
+  ## Environment variables can be used as tags, and throughout the config file
+  # user = "$USER"
+
 
 # Configuration for telegraf agent
 [agent]
@@ -22,11 +30,15 @@
   ## 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
+  ## Telegraf will send metrics to outputs in batches of at most
+  ## metric_batch_size metrics.
+  ## This controls the size of writes that Telegraf sends to output plugins.
+  metric_batch_size = 1000
+
+  ## Maximum number of unwritten metrics per output.  Increasing this value
+  ## allows for longer periods of output downtime without dropping metrics at the
+  ## cost of higher maximum memory usage.
+  metric_buffer_limit = 10000
 
   ## Collection jitter is used to jitter the collection by a random amount.
   ## Each plugin will sleep for a random time within jitter before collecting.
@@ -34,58 +46,197 @@
   ## 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
+  ## Default flushing interval for all outputs. 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"
+  ## By default or when set to "0s", precision will be set to the same
+  ## timestamp order as the collection interval, with the maximum being 1s.
+  ##   ie, when interval = "10s", precision will be "1s"
+  ##       when interval = "250ms", precision will be "1ms"
+  ## Precision will NOT be used for service inputs. It is up to each individual
+  ## service input to set the timestamp at the appropriate precision.
+  ## Valid time units are "ns", "us" (or "µs"), "ms", "s".
+  precision = ""
+
+  ## Log at debug level.
+  # debug = false
+  ## Log only error level messages.
+  # quiet = false
+
+  ## Log target controls the destination for logs and can be one of "file",
+  ## "stderr" or, on Windows, "eventlog".  When set to "file", the output file
+  ## is determined by the "logfile" setting.
+  # logtarget = "file"
+
+  ## Name of the file to be logged to when using the "file" logtarget.  If set to
+  ## the empty string then logs are written to stderr.
+  # logfile = ""
+
+  ## The logfile will be rotated after the time interval specified.  When set
+  ## to 0 no time based rotation is performed.  Logs are rotated only when
+  ## written to, if there is no log activity rotation may be delayed.
+  # logfile_rotation_interval = "0d"
+
+  ## The logfile will be rotated when it becomes larger than the specified
+  ## size.  When set to 0 no size based rotation is performed.
+  # logfile_rotation_max_size = "0MB"
+
+  ## Maximum number of rotated archives to keep, any older logs are deleted.
+  ## If set to -1, no archives are removed.
+  # logfile_rotation_max_archives = 5
 
   ## Override default hostname, if empty use os.Hostname()
   hostname = ""
+  ## If set to true, do no set the "host" tag in the telegraf agent.
+  omit_hostname = false
 
 
 ###############################################################################
-#                                  OUTPUTS                                    #
+#                            OUTPUT PLUGINS                                   #
 ###############################################################################
 
-# Configuration for influxdb server to send metrics to
+
+# Configuration for sending metrics to InfluxDB
 [[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://127.0.0.1:8089"] # UDP endpoint example
-  urls = ["http://127.0.0.1:8086"] # 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"
+  ## The full HTTP or UDP URL for your InfluxDB instance.
+  ##
+  ## Multiple URLs can be specified for a single cluster, only ONE of the
+  ## urls will be written to each interval.
+  # urls = ["unix:///var/run/influxdb.sock"]
+  # urls = ["udp://127.0.0.1:8089"]
+  # urls = ["http://127.0.0.1:8086"]
 
-  ## 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"
+  ## The target database for metrics; will be created as needed.
+  ## For UDP url endpoint database needs to be configured on server side.
+  # database = "telegraf"
+
+  ## The value of this tag will be used to determine the database.  If this
+  ## tag is not set the 'database' option is used as the default.
+  # database_tag = ""
+
+  ## If true, the 'database_tag' will not be included in the written metric.
+  # exclude_database_tag = false
+
+  ## If true, no CREATE DATABASE queries will be sent.  Set to true when using
+  ## Telegraf with a user without permissions to create databases or when the
+  ## database already exists.
+  # skip_database_creation = false
+
+  ## Name of existing retention policy to write to.  Empty string writes to
+  ## the default retention policy.  Only takes effect when using HTTP.
+  # retention_policy = ""
+
+  ## The value of this tag will be used to determine the retention policy.  If this
+  ## tag is not set the 'retention_policy' option is used as the default.
+  # retention_policy_tag = ""
+
+  ## If true, the 'retention_policy_tag' will not be included in the written metric.
+  # exclude_retention_policy_tag = false
+
+  ## Write consistency (clusters only), can be: "any", "one", "quorum", "all".
+  ## Only takes effect when using HTTP.
+  # write_consistency = "any"
+
+  ## Timeout for HTTP messages.
+  # timeout = "5s"
+
+  ## HTTP Basic Auth
   # username = "telegraf"
   # password = "metricsmetricsmetricsmetrics"
-  # Set the user agent for HTTP POSTs (can be useful for log differentiation)
+
+  ## HTTP User-Agent
   # user_agent = "telegraf"
-  # Set UDP payload size, defaults to InfluxDB UDP Client default (512 bytes)
-  # udp_payload = 512
+
+  ## UDP payload size is the maximum packet size to send.
+  # udp_payload = "512B"
+
+  ## Optional TLS Config for use on HTTP connections.
+  # tls_ca = "/etc/telegraf/ca.pem"
+  # tls_cert = "/etc/telegraf/cert.pem"
+  # tls_key = "/etc/telegraf/key.pem"
+  ## Use TLS but skip chain & host verification
+  # insecure_skip_verify = false
+
+  ## HTTP Proxy override, if unset values the standard proxy environment
+  ## variables are consulted to determine which proxy, if any, should be used.
+  # http_proxy = "http://corporate.proxy:3128"
+
+  ## Additional HTTP headers
+  # http_headers = {"X-Special-Header" = "Special-Value"}
+
+  ## HTTP Content-Encoding for write request body, can be set to "gzip" to
+  ## compress body or "identity" to apply no encoding.
+  # content_encoding = "identity"
+
+  ## When true, Telegraf will output unsigned integers as unsigned values,
+  ## i.e.: "42u".  You will need a version of InfluxDB supporting unsigned
+  ## integer values.  Enabling this option will result in field type errors if
+  ## existing data has been written.
+  # influx_uint_support = false
+
+# # Configuration for sending metrics to InfluxDB
+# [[outputs.influxdb_v2]]
+#   ## The URLs of the InfluxDB cluster nodes.
+#   ##
+#   ## Multiple URLs can be specified for a single cluster, only ONE of the
+#   ## urls will be written to each interval.
+#   ##   ex: urls = ["https://us-west-2-1.aws.cloud2.influxdata.com"]
+#   urls = ["http://127.0.0.1:9999"]
+#
+#   ## Token for authentication.
+#   token = ""
+#
+#   ## Organization is the name of the organization you wish to write to; must exist.
+#   organization = ""
+#
+#   ## Destination bucket to write into.
+#   bucket = ""
+#
+#   ## The value of this tag will be used to determine the bucket.  If this
+#   ## tag is not set the 'bucket' option is used as the default.
+#   # bucket_tag = ""
+#
+#   ## If true, the bucket tag will not be added to the metric.
+#   # exclude_bucket_tag = false
+#
+#   ## Timeout for HTTP messages.
+#   # timeout = "5s"
+#
+#   ## Additional HTTP headers
+#   # http_headers = {"X-Special-Header" = "Special-Value"}
+#
+#   ## HTTP Proxy override, if unset values the standard proxy environment
+#   ## variables are consulted to determine which proxy, if any, should be used.
+#   # http_proxy = "http://corporate.proxy:3128"
+#
+#   ## HTTP User-Agent
+#   # user_agent = "telegraf"
+#
+#   ## Content-Encoding for write request body, can be set to "gzip" to
+#   ## compress body or "identity" to apply no encoding.
+#   # content_encoding = "gzip"
+#
+#   ## Enable or disable uint support for writing uints influxdb 2.0.
+#   # influx_uint_support = false
+#
+#   ## Optional TLS Config for use on HTTP connections.
+#   # tls_ca = "/etc/telegraf/ca.pem"
+#   # tls_cert = "/etc/telegraf/cert.pem"
+#   # tls_key = "/etc/telegraf/key.pem"
+#   ## Use TLS but skip chain & host verification
+#   # insecure_skip_verify = false
 
 
 ###############################################################################
-#                                  INPUTS                                     #
+#                            INPUT PLUGINS                                    #
 ###############################################################################
 
+
 # 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,
@@ -120,8 +271,8 @@
       "% Disk Time",
       "% Disk Read Time",
       "% Disk Write Time",
-      "Current Disk Queue Length",
       "% Free Space",
+      "Current Disk Queue Length",
       "Free Megabytes",
     ]
     Measurement = "win_disk"
@@ -187,7 +338,6 @@
       "Standby Cache Reserve Bytes",
       "Standby Cache Normal Priority Bytes",
       "Standby Cache Core Bytes",
-
     ]
     # Use 6 x - to remove the Instance bit from the query.
     Instances = ["------"]
@@ -205,44 +355,31 @@
     Instances = ["_Total"]
     Measurement = "win_swap"
 
-  [[inputs.win_perf_counters.object]]
-    ObjectName = "Network Interface"
-    Instances = ["*"]
-    Counters = [
-      "Bytes Sent/sec",
-      "Bytes Received/sec",
-      "Packets Sent/sec",
-      "Packets Received/sec",
-      "Packets Received Discarded",
-      "Packets Received Errors",
-      "Packets Outbound Discarded",
-      "Packets Outbound Errors",
-    ]
-
-
 
 # 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_*"]
+#   ## If true, collect raw CPU time metrics.
+#   collect_cpu_time = false
+#   ## If true, compute and report the sum of all non-idle CPU states.
+#   report_active = false
 
 
 # # 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=["/"]
+#   ## By default stats will be gathered for all mount points.
+#   ## Set mount_points will restrict the stats to only the specified mount points.
+#   # 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"]
+#   ## Ignore mount points by filesystem type.
+#   ignore_fs = ["tmpfs", "devtmpfs", "devfs", "overlay", "aufs", "squashfs"]
 
 
 # # Read metrics about disk IO by device
@@ -250,9 +387,26 @@
 #   ## 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
+#   # devices = ["sda", "sdb", "vd*"]
+#   ## Uncomment the following line if you need disk serial numbers.
+#   # skip_serial_number = false
+#   #
+#   ## On systems which support it, device metadata can be added in the form of
+#   ## tags.
+#   ## Currently only Linux is supported via udev properties. You can view
+#   ## available properties for a device by running:
+#   ## 'udevadm info -q property -n /dev/sda'
+#   # device_tags = ["ID_FS_TYPE", "ID_FS_USAGE"]
+#   #
+#   ## Using the same metadata source as device_tags, you can also customize the
+#   ## name of the device via templates.
+#   ## The 'name_templates' parameter is a list of templates to try and apply to
+#   ## the device. The template may contain variables in the form of '$PROPERTY' or
+#   ## '${PROPERTY}'. The first template which does not contain any variables not
+#   ## present for the device is used as the device name tag.
+#   ## The typical use case is for LVM volumes, to get the VG/LV name instead of
+#   ## the near-meaningless DM-0 name.
+#   # name_templates = ["$ID_FS_LABEL","$DM_VG_NAME/$DM_LV_NAME"]
 
 
 # # Read metrics about memory usage
@@ -263,4 +417,3 @@
 # # Read metrics about swap memory usage
 # [[inputs.swap]]
 #   # no configuration
-

filter/filter_test.go

@@ -37,6 +37,24 @@ func TestCompile(t *testing.T) {
 	assert.True(t, f.Match("network"))
 }
 
+func TestIncludeExclude(t *testing.T) {
+	tags := []string{}
+	labels := []string{"best", "com_influxdata", "timeseries", "com_influxdata_telegraf", "ever"}
+
+	filter, err := NewIncludeExcludeFilter([]string{}, []string{"com_influx*"})
+	if err != nil {
+		t.Fatalf("Failed to create include/exclude filter - %v", err)
+	}
+
+	for i := range labels {
+		if filter.Match(labels[i]) {
+			tags = append(tags, labels[i])
+		}
+	}
+
+	assert.Equal(t, []string{"best", "timeseries", "ever"}, tags)
+}
+
 var benchbool bool
 
 func BenchmarkFilterSingleNoGlobFalse(b *testing.B) {

go.mod

@@ -0,0 +1,161 @@
+module github.com/influxdata/telegraf
+
+go 1.12
+
+require (
+	cloud.google.com/go v0.53.0
+	cloud.google.com/go/datastore v1.1.0 // indirect
+	cloud.google.com/go/pubsub v1.2.0
+	code.cloudfoundry.org/clock v1.0.0 // indirect
+	collectd.org v0.3.0
+	github.com/Azure/azure-event-hubs-go/v3 v3.2.0
+	github.com/Azure/azure-storage-queue-go v0.0.0-20181215014128-6ed74e755687
+	github.com/Azure/go-autorest/autorest v0.9.3
+	github.com/Azure/go-autorest/autorest/azure/auth v0.4.2
+	github.com/BurntSushi/toml v0.3.1
+	github.com/ChimeraCoder/anaconda v2.0.0+incompatible
+	github.com/ChimeraCoder/tokenbucket v0.0.0-20131201223612-c5a927568de7 // indirect
+	github.com/Mellanox/rdmamap v0.0.0-20191106181932-7c3c4763a6ee
+	github.com/Microsoft/ApplicationInsights-Go v0.4.2
+	github.com/Microsoft/go-winio v0.4.9 // indirect
+	github.com/Shopify/sarama v1.24.1
+	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6
+	github.com/aerospike/aerospike-client-go v1.27.0
+	github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4
+	github.com/amir/raidman v0.0.0-20170415203553-1ccc43bfb9c9
+	github.com/apache/thrift v0.12.0
+	github.com/aristanetworks/glog v0.0.0-20191112221043-67e8567f59f3 // indirect
+	github.com/aristanetworks/goarista v0.0.0-20190325233358-a123909ec740
+	github.com/armon/go-metrics v0.3.0 // indirect
+	github.com/aws/aws-sdk-go v1.30.9
+	github.com/azr/backoff v0.0.0-20160115115103-53511d3c7330 // indirect
+	github.com/benbjohnson/clock v1.0.2
+	github.com/bitly/go-hostpool v0.1.0 // indirect
+	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
+	github.com/caio/go-tdigest v2.3.0+incompatible // indirect
+	github.com/cenkalti/backoff v2.0.0+incompatible // indirect
+	github.com/cisco-ie/nx-telemetry-proto v0.0.0-20190531143454-82441e232cf6
+	github.com/cockroachdb/apd v1.1.0 // indirect
+	github.com/couchbase/go-couchbase v0.0.0-20180501122049-16db1f1fe037
+	github.com/couchbase/gomemcached v0.0.0-20180502221210-0da75df14530 // indirect
+	github.com/couchbase/goutils v0.0.0-20180530154633-e865a1461c8a // indirect
+	github.com/denisenkom/go-mssqldb v0.0.0-20190707035753-2be1aa521ff4
+	github.com/dgrijalva/jwt-go v3.2.0+incompatible
+	github.com/docker/distribution v2.6.0-rc.1.0.20170726174610-edc3ab29cdff+incompatible // indirect
+	github.com/docker/docker v1.4.2-0.20180327123150-ed7b6428c133
+	github.com/docker/go-connections v0.3.0 // indirect
+	github.com/docker/go-units v0.3.3 // indirect
+	github.com/docker/libnetwork v0.8.0-dev.2.0.20181012153825-d7b61745d166
+	github.com/dustin/go-jsonpointer v0.0.0-20160814072949-ba0abeacc3dc // indirect
+	github.com/dustin/gojson v0.0.0-20160307161227-2e71ec9dd5ad // indirect
+	github.com/eclipse/paho.mqtt.golang v1.2.0
+	github.com/ericchiang/k8s v1.2.0
+	github.com/garyburd/go-oauth v0.0.0-20180319155456-bca2e7f09a17 // indirect
+	github.com/ghodss/yaml v1.0.1-0.20190212211648-25d852aebe32
+	github.com/glinton/ping v0.1.4-0.20200311211934-5ac87da8cd96
+	github.com/go-logfmt/logfmt v0.4.0
+	github.com/go-ole/go-ole v1.2.1 // indirect
+	github.com/go-redis/redis v6.12.0+incompatible
+	github.com/go-sql-driver/mysql v1.5.0
+	github.com/goburrow/modbus v0.1.0
+	github.com/goburrow/serial v0.1.0 // indirect
+	github.com/gobwas/glob v0.2.3
+	github.com/gofrs/uuid v2.1.0+incompatible
+	github.com/gogo/protobuf v1.2.2-0.20190723190241-65acae22fc9d
+	github.com/golang/geo v0.0.0-20190916061304-5b978397cfec
+	github.com/golang/protobuf v1.3.5
+	github.com/google/go-cmp v0.4.0
+	github.com/google/go-github v17.0.0+incompatible
+	github.com/google/go-querystring v1.0.0 // indirect
+	github.com/gorilla/mux v1.6.2
+	github.com/gotestyourself/gotestyourself v2.2.0+incompatible // indirect
+	github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed // indirect
+	github.com/harlow/kinesis-consumer v0.3.1-0.20181230152818-2f58b136fee0
+	github.com/hashicorp/consul v1.2.1
+	github.com/hashicorp/go-msgpack v0.5.5 // indirect
+	github.com/hashicorp/go-rootcerts v0.0.0-20160503143440-6bb64b370b90 // indirect
+	github.com/hashicorp/memberlist v0.1.5 // indirect
+	github.com/hashicorp/serf v0.8.1 // indirect
+	github.com/influxdata/go-syslog/v2 v2.0.1
+	github.com/influxdata/tail v1.0.1-0.20180327235535-c43482518d41
+	github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65
+	github.com/influxdata/wlog v0.0.0-20160411224016-7c63b0a71ef8
+	github.com/jackc/fake v0.0.0-20150926172116-812a484cc733 // indirect
+	github.com/jackc/pgx v3.6.0+incompatible
+	github.com/jcmturner/gofork v1.0.0 // indirect
+	github.com/kardianos/service v1.0.0
+	github.com/karrick/godirwalk v1.12.0
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
+	github.com/klauspost/compress v1.9.2 // indirect
+	github.com/kubernetes/apimachinery v0.0.0-20190119020841-d41becfba9ee
+	github.com/kylelemons/godebug v1.1.0 // indirect
+	github.com/leesper/go_rng v0.0.0-20190531154944-a612b043e353 // indirect
+	github.com/lib/pq v1.3.0 // indirect
+	github.com/mailru/easyjson v0.0.0-20180717111219-efc7eb8984d6 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1
+	github.com/mdlayher/apcupsd v0.0.0-20190314144147-eb3dd99a75fe
+	github.com/miekg/dns v1.0.14
+	github.com/mitchellh/go-testing-interface v1.0.0 // indirect
+	github.com/mmcdole/gofeed v1.0.0
+	github.com/multiplay/go-ts3 v1.0.0
+	github.com/naoina/go-stringutil v0.1.0 // indirect
+	github.com/nats-io/nats-server/v2 v2.1.4
+	github.com/nats-io/nats.go v1.9.1
+	github.com/newrelic/newrelic-telemetry-sdk-go v0.2.0
+	github.com/nsqio/go-nsq v1.0.7
+	github.com/openconfig/gnmi v0.0.0-20180912164834-33a1865c3029
+	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
+	github.com/opencontainers/image-spec v1.0.1 // indirect
+	github.com/opentracing-contrib/go-observer v0.0.0-20170622124052-a52f23424492 // indirect
+	github.com/opentracing/opentracing-go v1.0.2 // indirect
+	github.com/openzipkin/zipkin-go-opentracing v0.3.4
+	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.5.1
+	github.com/prometheus/client_model v0.2.0
+	github.com/prometheus/common v0.9.1
+	github.com/safchain/ethtool v0.0.0-20200218184317-f459e2d13664
+	github.com/samuel/go-zookeeper v0.0.0-20180130194729-c4fab1ac1bec // indirect
+	github.com/satori/go.uuid v1.2.1-0.20181028125025-b2ce2384e17b // indirect
+	github.com/shirou/gopsutil v2.20.2+incompatible
+	github.com/shopspring/decimal v0.0.0-20200105231215-408a2507e114 // indirect
+	github.com/sirupsen/logrus v1.4.2
+	github.com/soniah/gosnmp v1.25.0
+	github.com/streadway/amqp v0.0.0-20180528204448-e5adc2ada8b8
+	github.com/stretchr/testify v1.5.1
+	github.com/tbrandon/mbserver v0.0.0-20170611213546-993e1772cc62
+	github.com/tedsuo/ifrit v0.0.0-20191009134036-9a97d0632f00 // indirect
+	github.com/tidwall/gjson v1.3.0
+	github.com/vishvananda/netlink v0.0.0-20171020171820-b2de5d10e38e // indirect
+	github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc // indirect
+	github.com/vjeantet/grok v1.0.0
+	github.com/vmware/govmomi v0.19.0
+	github.com/wavefronthq/wavefront-sdk-go v0.9.2
+	github.com/wvanbergen/kafka v0.0.0-20171203153745-e2edea948ddf
+	github.com/wvanbergen/kazoo-go v0.0.0-20180202103751-f72d8611297a // indirect
+	github.com/yuin/gopher-lua v0.0.0-20180630135845-46796da1b0b4 // indirect
+	golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6 // indirect
+	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
+	golang.org/x/net v0.0.0-20200301022130-244492dfa37a
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a // indirect
+	golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4
+	golang.org/x/tools v0.0.0-20200317043434-63da46f3035e // indirect
+	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20200205215550-e35592f146e4
+	gonum.org/v1/gonum v0.6.2 // indirect
+	google.golang.org/api v0.20.0
+	google.golang.org/genproto v0.0.0-20200317114155-1f3552e48f24
+	google.golang.org/grpc v1.28.0
+	gopkg.in/fatih/pool.v2 v2.0.0 // indirect
+	gopkg.in/gorethink/gorethink.v3 v3.0.5
+	gopkg.in/jcmturner/gokrb5.v7 v7.3.0 // indirect
+	gopkg.in/ldap.v3 v3.1.0
+	gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce
+	gopkg.in/olivere/elastic.v5 v5.0.70
+	gopkg.in/yaml.v2 v2.2.5
+	gotest.tools v2.2.0+incompatible // indirect
+	honnef.co/go/tools v0.0.1-2020.1.3 // indirect
+	k8s.io/apimachinery v0.17.1 // indirect
+)
+
+// replaced due to https://github.com/satori/go.uuid/issues/73
+replace github.com/satori/go.uuid => github.com/gofrs/uuid v3.2.0+incompatible

go.sum

@@ -0,0 +1,915 @@
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input.go

@@ -1,11 +1,7 @@
 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
+	PluginDescriber
 
 	// Gather takes in an accumulator and adds the metrics that the Input
 	// gathers. This is called every "interval"
@@ -13,17 +9,10 @@ type Input interface {
 }
 
 type ServiceInput interface {
-	// SampleConfig returns the default configuration of the Input
-	SampleConfig() string
+	Input
 
-	// 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 the ServiceInput.  The Accumulator may be retained and used until
+	// Stop returns.
 	Start(Accumulator) error
 
 	// Stop stops the services and closes any necessary channels and connections

internal/buffer/buffer.go

@@ -1,76 +0,0 @@
-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:
-			b.mu.Lock()
-			MetricsDropped.Incr(1)
-			<-b.buf
-			b.buf <- metrics[i]
-			b.mu.Unlock()
-		}
-	}
-}
-
-// 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

@@ -1,100 +0,0 @@
-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/choice/choice.go

@@ -0,0 +1,36 @@
+// Package choice provides basic functions for working with
+// plugin options that must be one of several values.
+package choice
+
+import "fmt"
+
+// Contains return true if the choice in the list of choices.
+func Contains(choice string, choices []string) bool {
+	for _, item := range choices {
+		if item == choice {
+			return true
+		}
+	}
+	return false
+}
+
+// CheckSContains returns an error if a choice is not one of
+// the available choices.
+func Check(choice string, available []string) error {
+	if !Contains(choice, available) {
+		return fmt.Errorf("unknown choice %s", choice)
+	}
+	return nil
+}
+
+// CheckSliceContains returns an error if the choices is not a subset of
+// available.
+func CheckSlice(choices, available []string) error {
+	for _, choice := range choices {
+		err := Check(choice, available)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

internal/config/testdata/subconfig/..4984_10_04_08_28_06.119/invalid-config.conf

@@ -1,4 +0,0 @@
-# This invalid config file should be skipped during testing
-# as it is an ..data folder
-
-[[outputs.influxdb

internal/content_coding.go

@@ -0,0 +1,182 @@
+package internal
+
+import (
+	"bufio"
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"io"
+)
+
+// NewStreamContentDecoder returns a reader that will decode the stream
+// according to the encoding type.
+func NewStreamContentDecoder(encoding string, r io.Reader) (io.Reader, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipReader(r)
+	case "identity", "":
+		return r, nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// GzipReader is similar to gzip.Reader but reads only a single gzip stream per read.
+type GzipReader struct {
+	r           io.Reader
+	z           *gzip.Reader
+	endOfStream bool
+}
+
+func NewGzipReader(r io.Reader) (io.Reader, error) {
+	// We need a read that implements ByteReader in order to line up the next
+	// stream.
+	br := bufio.NewReader(r)
+
+	// Reads the first gzip stream header.
+	z, err := gzip.NewReader(br)
+	if err != nil {
+		return nil, err
+	}
+
+	// Prevent future calls to Read from reading the following gzip header.
+	z.Multistream(false)
+
+	return &GzipReader{r: br, z: z}, nil
+}
+
+func (r *GzipReader) Read(b []byte) (int, error) {
+	if r.endOfStream {
+		// Reads the next gzip header and prepares for the next stream.
+		err := r.z.Reset(r.r)
+		if err != nil {
+			return 0, err
+		}
+		r.z.Multistream(false)
+		r.endOfStream = false
+	}
+
+	n, err := r.z.Read(b)
+
+	// Since multistream is disabled, io.EOF indicates the end of the gzip
+	// sequence.  On the next read we must read the next gzip header.
+	if err == io.EOF {
+		r.endOfStream = true
+		return n, nil
+	}
+	return n, err
+
+}
+
+// NewContentEncoder returns a ContentEncoder for the encoding type.
+func NewContentEncoder(encoding string) (ContentEncoder, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipEncoder()
+	case "identity", "":
+		return NewIdentityEncoder(), nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// NewContentDecoder returns a ContentDecoder for the encoding type.
+func NewContentDecoder(encoding string) (ContentDecoder, error) {
+	switch encoding {
+	case "gzip":
+		return NewGzipDecoder()
+	case "identity", "":
+		return NewIdentityDecoder(), nil
+	default:
+		return nil, errors.New("invalid value for content_encoding")
+	}
+}
+
+// ContentEncoder applies a wrapper encoding to byte buffers.
+type ContentEncoder interface {
+	Encode([]byte) ([]byte, error)
+}
+
+// GzipEncoder compresses the buffer using gzip at the default level.
+type GzipEncoder struct {
+	writer *gzip.Writer
+	buf    *bytes.Buffer
+}
+
+func NewGzipEncoder() (*GzipEncoder, error) {
+	var buf bytes.Buffer
+	return &GzipEncoder{
+		writer: gzip.NewWriter(&buf),
+		buf:    &buf,
+	}, nil
+}
+
+func (e *GzipEncoder) Encode(data []byte) ([]byte, error) {
+	e.buf.Reset()
+	e.writer.Reset(e.buf)
+
+	_, err := e.writer.Write(data)
+	if err != nil {
+		return nil, err
+	}
+	err = e.writer.Close()
+	if err != nil {
+		return nil, err
+	}
+	return e.buf.Bytes(), nil
+}
+
+// IdentityEncoder is a null encoder that applies no transformation.
+type IdentityEncoder struct{}
+
+func NewIdentityEncoder() *IdentityEncoder {
+	return &IdentityEncoder{}
+}
+
+func (*IdentityEncoder) Encode(data []byte) ([]byte, error) {
+	return data, nil
+}
+
+// ContentDecoder removes a wrapper encoding from byte buffers.
+type ContentDecoder interface {
+	Decode([]byte) ([]byte, error)
+}
+
+// GzipDecoder decompresses buffers with gzip compression.
+type GzipDecoder struct {
+	reader *gzip.Reader
+	buf    *bytes.Buffer
+}
+
+func NewGzipDecoder() (*GzipDecoder, error) {
+	return &GzipDecoder{
+		reader: new(gzip.Reader),
+		buf:    new(bytes.Buffer),
+	}, nil
+}
+
+func (d *GzipDecoder) Decode(data []byte) ([]byte, error) {
+	d.reader.Reset(bytes.NewBuffer(data))
+	d.buf.Reset()
+
+	_, err := d.buf.ReadFrom(d.reader)
+	if err != nil && err != io.EOF {
+		return nil, err
+	}
+	err = d.reader.Close()
+	if err != nil {
+		return nil, err
+	}
+	return d.buf.Bytes(), nil
+}
+
+// IdentityDecoder is a null decoder that returns the input.
+type IdentityDecoder struct{}
+
+func NewIdentityDecoder() *IdentityDecoder {
+	return &IdentityDecoder{}
+}
+
+func (*IdentityDecoder) Decode(data []byte) ([]byte, error) {
+	return data, nil
+}

internal/content_coding_test.go

@@ -0,0 +1,94 @@
+package internal
+
+import (
+	"bytes"
+	"io/ioutil"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGzipEncodeDecode(t *testing.T) {
+	enc, err := NewGzipEncoder()
+	require.NoError(t, err)
+	dec, err := NewGzipDecoder()
+	require.NoError(t, err)
+
+	payload, err := enc.Encode([]byte("howdy"))
+	require.NoError(t, err)
+
+	actual, err := dec.Decode(payload)
+	require.NoError(t, err)
+
+	require.Equal(t, "howdy", string(actual))
+}
+
+func TestGzipReuse(t *testing.T) {
+	enc, err := NewGzipEncoder()
+	require.NoError(t, err)
+	dec, err := NewGzipDecoder()
+	require.NoError(t, err)
+
+	payload, err := enc.Encode([]byte("howdy"))
+	require.NoError(t, err)
+
+	actual, err := dec.Decode(payload)
+	require.NoError(t, err)
+
+	require.Equal(t, "howdy", string(actual))
+
+	payload, err = enc.Encode([]byte("doody"))
+	require.NoError(t, err)
+
+	actual, err = dec.Decode(payload)
+	require.NoError(t, err)
+
+	require.Equal(t, "doody", string(actual))
+}
+
+func TestIdentityEncodeDecode(t *testing.T) {
+	enc := NewIdentityEncoder()
+	dec := NewIdentityDecoder()
+
+	payload, err := enc.Encode([]byte("howdy"))
+	require.NoError(t, err)
+
+	actual, err := dec.Decode(payload)
+	require.NoError(t, err)
+
+	require.Equal(t, "howdy", string(actual))
+}
+
+func TestStreamIdentityDecode(t *testing.T) {
+	var r bytes.Buffer
+	n, err := r.Write([]byte("howdy"))
+	require.NoError(t, err)
+	require.Equal(t, 5, n)
+
+	dec, err := NewStreamContentDecoder("identity", &r)
+	require.NoError(t, err)
+
+	data, err := ioutil.ReadAll(dec)
+	require.NoError(t, err)
+
+	require.Equal(t, []byte("howdy"), data)
+}
+
+func TestStreamGzipDecode(t *testing.T) {
+	enc, err := NewGzipEncoder()
+	require.NoError(t, err)
+	written, err := enc.Encode([]byte("howdy"))
+	require.NoError(t, err)
+
+	w := bytes.NewBuffer(written)
+
+	dec, err := NewStreamContentDecoder("gzip", w)
+	require.NoError(t, err)
+
+	b := make([]byte, 10)
+	n, err := dec.Read(b)
+	require.NoError(t, err)
+	require.Equal(t, 5, n)
+
+	require.Equal(t, []byte("howdy"), b[:n])
+}

internal/docker/docker.go

@@ -0,0 +1,36 @@
+package docker
+
+import "strings"
+
+// Adapts some of the logic from the actual Docker library's image parsing
+// routines:
+// https://github.com/docker/distribution/blob/release/2.7/reference/normalize.go
+func ParseImage(image string) (string, string) {
+	domain := ""
+	remainder := ""
+
+	i := strings.IndexRune(image, '/')
+
+	if i == -1 || (!strings.ContainsAny(image[:i], ".:") && image[:i] != "localhost") {
+		remainder = image
+	} else {
+		domain, remainder = image[:i], image[i+1:]
+	}
+
+	imageName := ""
+	imageVersion := "unknown"
+
+	i = strings.LastIndex(remainder, ":")
+	if i > -1 {
+		imageVersion = remainder[i+1:]
+		imageName = remainder[:i]
+	} else {
+		imageName = remainder
+	}
+
+	if domain != "" {
+		imageName = domain + "/" + imageName
+	}
+
+	return imageName, imageVersion
+}

internal/docker/docker_test.go

@@ -0,0 +1,59 @@
+package docker_test
+
+import (
+	"testing"
+
+	"github.com/influxdata/telegraf/internal/docker"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseImage(t *testing.T) {
+	tests := []struct {
+		image         string
+		parsedName    string
+		parsedVersion string
+	}{
+		{
+			image:         "postgres",
+			parsedName:    "postgres",
+			parsedVersion: "unknown",
+		},
+		{
+			image:         "postgres:latest",
+			parsedName:    "postgres",
+			parsedVersion: "latest",
+		},
+		{
+			image:         "coreos/etcd",
+			parsedName:    "coreos/etcd",
+			parsedVersion: "unknown",
+		},
+		{
+			image:         "coreos/etcd:latest",
+			parsedName:    "coreos/etcd",
+			parsedVersion: "latest",
+		},
+		{
+			image:         "quay.io/postgres",
+			parsedName:    "quay.io/postgres",
+			parsedVersion: "unknown",
+		},
+		{
+			image:         "quay.io:4443/coreos/etcd",
+			parsedName:    "quay.io:4443/coreos/etcd",
+			parsedVersion: "unknown",
+		},
+		{
+			image:         "quay.io:4443/coreos/etcd:latest",
+			parsedName:    "quay.io:4443/coreos/etcd",
+			parsedVersion: "latest",
+		},
+	}
+	for _, tt := range tests {
+		t.Run("parse name "+tt.image, func(t *testing.T) {
+			imageName, imageVersion := docker.ParseImage(tt.image)
+			require.Equal(t, tt.parsedName, imageName)
+			require.Equal(t, tt.parsedVersion, imageVersion)
+		})
+	}
+}

internal/exec.go

@@ -0,0 +1,30 @@
+package internal
+
+import (
+	"bytes"
+	"os/exec"
+	"time"
+)
+
+// 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)
+}

internal/exec_unix.go

@@ -0,0 +1,58 @@
+// +build !windows
+
+package internal
+
+import (
+	"log"
+	"os/exec"
+	"syscall"
+	"time"
+)
+
+// KillGrace is the amount of time we allow a process to shutdown before
+// sending a SIGKILL.
+const KillGrace = 5 * time.Second
+
+// 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 {
+	var kill *time.Timer
+	term := time.AfterFunc(timeout, func() {
+		err := c.Process.Signal(syscall.SIGTERM)
+		if err != nil {
+			log.Printf("E! [agent] Error terminating process: %s", err)
+			return
+		}
+
+		kill = time.AfterFunc(KillGrace, func() {
+			err := c.Process.Kill()
+			if err != nil {
+				log.Printf("E! [agent] Error killing process: %s", err)
+				return
+			}
+		})
+	})
+
+	err := c.Wait()
+
+	// Shutdown all timers
+	if kill != nil {
+		kill.Stop()
+	}
+	termSent := !term.Stop()
+
+	// If the process exited without error treat it as success.  This allows a
+	// process to do a clean shutdown on signal.
+	if err == nil {
+		return nil
+	}
+
+	// If SIGTERM was sent then treat any process error as a timeout.
+	if termSent {
+		return TimeoutErr
+	}
+
+	// Otherwise there was an error unrelated to termination.
+	return err
+}

internal/exec_windows.go

@@ -0,0 +1,41 @@
+// +build windows
+
+package internal
+
+import (
+	"log"
+	"os/exec"
+	"time"
+)
+
+// 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.AfterFunc(timeout, func() {
+		err := c.Process.Kill()
+		if err != nil {
+			log.Printf("E! [agent] Error killing process: %s", err)
+			return
+		}
+	})
+
+	err := c.Wait()
+
+	// Shutdown all timers
+	termSent := !timer.Stop()
+
+	// If the process exited without error treat it as success.  This allows a
+	// process to do a clean shutdown on signal.
+	if err == nil {
+		return nil
+	}
+
+	// If SIGTERM was sent then treat any process error as a timeout.
+	if termSent {
+		return TimeoutErr
+	}
+
+	// Otherwise there was an error unrelated to termination.
+	return err
+}

internal/globpath/globpath.go

@@ -1,110 +1,116 @@
 package globpath
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 
 	"github.com/gobwas/glob"
+	"github.com/karrick/godirwalk"
 )
 
-var sepStr = fmt.Sprintf("%v", string(os.PathSeparator))
-
 type GlobPath struct {
 	path         string
 	hasMeta      bool
-	hasSuperMeta bool
+	HasSuperMeta bool
+	rootGlob     string
 	g            glob.Glob
-	root         string
 }
 
 func Compile(path string) (*GlobPath, error) {
 	out := GlobPath{
 		hasMeta:      hasMeta(path),
-		hasSuperMeta: hasSuperMeta(path),
-		path:         path,
+		HasSuperMeta: hasSuperMeta(path),
+		path:         filepath.FromSlash(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 {
+	// a glob object
+	if !out.hasMeta || !out.HasSuperMeta {
 		return &out, nil
 	}
 
+	// find the root elements of the object path, the entry point for recursion
+	// when you have a super-meta in your path (which are :
+	// glob(/your/expression/until/first/star/of/super-meta))
+	out.rootGlob = path[:strings.Index(path, "**")+1]
 	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 {
+// Match returns all files matching the expression.
+// If it's a static path, returns path.
+// All returned path will have the host platform separator.
+func (g *GlobPath) Match() []string {
 	if !g.hasMeta {
-		out := make(map[string]os.FileInfo)
-		info, err := os.Stat(g.path)
-		if err == nil {
-			out[g.path] = info
-		}
-		return out
+		return []string{g.path}
 	}
-	if !g.hasSuperMeta {
-		out := make(map[string]os.FileInfo)
+	if !g.HasSuperMeta {
 		files, _ := filepath.Glob(g.path)
-		for _, file := range files {
-			info, err := os.Stat(file)
-			if err == nil {
-				out[file] = info
-			}
-		}
-		return out
+		return files
 	}
-	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
+	roots, err := filepath.Glob(g.rootGlob)
+	if err != nil {
+		return []string{}
+	}
+	out := []string{}
+	walkfn := func(path string, _ *godirwalk.Dirent) error {
+		if g.g.Match(path) {
+			out = append(out, path)
 		}
 		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 == "" {
+	}
+	for _, root := range roots {
+		fileinfo, err := os.Stat(root)
+		if err != nil {
 			continue
 		}
-		if hasMeta(item) {
-			break
+		if !fileinfo.IsDir() {
+			if g.MatchString(root) {
+				out = append(out, root)
+			}
+			continue
 		}
-		out += item + sepStr
-	}
-	if out != "/" {
-		out = strings.TrimSuffix(out, "/")
+		godirwalk.Walk(root, &godirwalk.Options{
+			Callback: walkfn,
+			Unsorted: true,
+		})
 	}
 	return out
 }
 
+// MatchString tests the path string against the glob.  The path should contain
+// the host platform separator.
+func (g *GlobPath) MatchString(path string) bool {
+	if !g.HasSuperMeta {
+		res, _ := filepath.Match(g.path, path)
+		return res
+	}
+	return g.g.Match(path)
+}
+
+// GetRoots returns a list of files and directories which should be optimal
+// prefixes of matching files when you have a super-meta in your expression :
+// - any directory under these roots may contain a matching file
+// - no file outside of these roots can match the pattern
+// Note that it returns both files and directories.
+// All returned path will have the host platform separator.
+func (g *GlobPath) GetRoots() []string {
+	if !g.hasMeta {
+		return []string{g.path}
+	}
+	if !g.HasSuperMeta {
+		matches, _ := filepath.Glob(g.path)
+		return matches
+	}
+	roots, _ := filepath.Glob(g.rootGlob)
+	return roots
+}
+
 // hasMeta reports whether path contains any magic glob characters.
 func hasMeta(path string) bool {
 	return strings.IndexAny(path, "*?[") >= 0

internal/globpath/globpath_test.go

@@ -1,12 +1,10 @@
 package globpath
 
 import (
-	"os"
 	"runtime"
 	"strings"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -29,31 +27,32 @@ func TestCompileAndMatch(t *testing.T) {
 	require.NoError(t, err)
 
 	matches := g1.Match()
-	assert.Len(t, matches, 6)
+	require.Len(t, matches, 6)
 	matches = g2.Match()
-	assert.Len(t, matches, 2)
+	require.Len(t, matches, 2)
 	matches = g3.Match()
-	assert.Len(t, matches, 1)
+	require.Len(t, matches, 1)
 	matches = g4.Match()
-	assert.Len(t, matches, 0)
+	require.Len(t, matches, 1)
 	matches = g5.Match()
-	assert.Len(t, matches, 0)
+	require.Len(t, matches, 0)
 }
 
-func TestFindRootDir(t *testing.T) {
+func TestRootGlob(t *testing.T) {
+	dir := getTestdataDir()
 	tests := []struct {
 		input  string
 		output string
 	}{
-		{"/var/log/telegraf.conf", "/var/log"},
-		{"/home/**", "/home"},
-		{"/home/*/**", "/home"},
-		{"/lib/share/*/*/**.txt", "/lib/share"},
+		{dir + "/**", dir + "/*"},
+		{dir + "/nested?/**", dir + "/nested?/*"},
+		{dir + "/ne**/nest*", dir + "/ne*"},
+		{dir + "/nested?/*", ""},
 	}
 
 	for _, test := range tests {
-		actual := findRootDir(test.input)
-		assert.Equal(t, test.output, actual)
+		actual, _ := Compile(test.input)
+		require.Equal(t, actual.rootGlob, test.output)
 	}
 }
 
@@ -64,7 +63,7 @@ func TestFindNestedTextFile(t *testing.T) {
 	require.NoError(t, err)
 
 	matches := g1.Match()
-	assert.Len(t, matches, 1)
+	require.Len(t, matches, 1)
 }
 
 func getTestdataDir() string {
@@ -75,10 +74,10 @@ func getTestdataDir() string {
 func TestMatch_ErrPermission(t *testing.T) {
 	tests := []struct {
 		input    string
-		expected map[string]os.FileInfo
+		expected []string
 	}{
-		{"/root/foo", map[string]os.FileInfo{}},
-		{"/root/f*", map[string]os.FileInfo{}},
+		{"/root/foo", []string{"/root/foo"}},
+		{"/root/f*", []string(nil)},
 	}
 
 	for _, test := range tests {
@@ -88,3 +87,14 @@ func TestMatch_ErrPermission(t *testing.T) {
 		require.Equal(t, test.expected, actual)
 	}
 }
+
+func TestWindowsSeparator(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("Skipping Windows only test")
+	}
+
+	glob, err := Compile("testdata/nested1")
+	require.NoError(t, err)
+	ok := glob.MatchString("testdata\\nested1")
+	require.True(t, ok)
+}

internal/goplugin/noplugin.go

@@ -0,0 +1,9 @@
+// +build !goplugin
+
+package goplugin
+
+import "errors"
+
+func LoadExternalPlugins(rootDir string) error {
+	return errors.New("go plugin support is not enabled")
+}

internal/goplugin/plugin.go

@@ -0,0 +1,42 @@
+// +build goplugin
+
+package goplugin
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"plugin"
+	"strings"
+)
+
+// loadExternalPlugins loads external plugins from shared libraries (.so, .dll, etc.)
+// in the specified directory.
+func LoadExternalPlugins(rootDir string) error {
+	return filepath.Walk(rootDir, func(pth string, info os.FileInfo, err error) error {
+		// Stop if there was an error.
+		if err != nil {
+			return err
+		}
+
+		// Ignore directories.
+		if info.IsDir() {
+			return nil
+		}
+
+		// Ignore files that aren't shared libraries.
+		ext := strings.ToLower(path.Ext(pth))
+		if ext != ".so" && ext != ".dll" {
+			return nil
+		}
+
+		// Load plugin.
+		_, err = plugin.Open(pth)
+		if err != nil {
+			return fmt.Errorf("error loading %s: %s", pth, err)
+		}
+
+		return nil
+	})
+}

internal/http.go

@@ -0,0 +1,108 @@
+package internal
+
+import (
+	"crypto/subtle"
+	"net"
+	"net/http"
+	"net/url"
+)
+
+type BasicAuthErrorFunc func(rw http.ResponseWriter)
+
+// AuthHandler returns a http handler that requires HTTP basic auth
+// credentials to match the given username and password.
+func AuthHandler(username, password, realm string, onError BasicAuthErrorFunc) func(h http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &basicAuthHandler{
+			username: username,
+			password: password,
+			realm:    realm,
+			onError:  onError,
+			next:     h,
+		}
+	}
+}
+
+type basicAuthHandler struct {
+	username string
+	password string
+	realm    string
+	onError  BasicAuthErrorFunc
+	next     http.Handler
+}
+
+func (h *basicAuthHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if h.username != "" || h.password != "" {
+		reqUsername, reqPassword, ok := req.BasicAuth()
+		if !ok ||
+			subtle.ConstantTimeCompare([]byte(reqUsername), []byte(h.username)) != 1 ||
+			subtle.ConstantTimeCompare([]byte(reqPassword), []byte(h.password)) != 1 {
+
+			rw.Header().Set("WWW-Authenticate", "Basic realm=\""+h.realm+"\"")
+			h.onError(rw)
+			http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+			return
+		}
+	}
+
+	h.next.ServeHTTP(rw, req)
+}
+
+// ErrorFunc is a callback for writing an error response.
+type ErrorFunc func(rw http.ResponseWriter, code int)
+
+// IPRangeHandler returns a http handler that requires the remote address to be
+// in the specified network.
+func IPRangeHandler(network []*net.IPNet, onError ErrorFunc) func(h http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &ipRangeHandler{
+			network: network,
+			onError: onError,
+			next:    h,
+		}
+	}
+}
+
+type ipRangeHandler struct {
+	network []*net.IPNet
+	onError ErrorFunc
+	next    http.Handler
+}
+
+func (h *ipRangeHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	if len(h.network) == 0 {
+		h.next.ServeHTTP(rw, req)
+		return
+	}
+
+	remoteIPString, _, err := net.SplitHostPort(req.RemoteAddr)
+	if err != nil {
+		h.onError(rw, http.StatusForbidden)
+		return
+	}
+
+	remoteIP := net.ParseIP(remoteIPString)
+	if remoteIP == nil {
+		h.onError(rw, http.StatusForbidden)
+		return
+	}
+
+	for _, net := range h.network {
+		if net.Contains(remoteIP) {
+			h.next.ServeHTTP(rw, req)
+			return
+		}
+	}
+
+	h.onError(rw, http.StatusForbidden)
+}
+
+func OnClientError(client *http.Client, err error) {
+	// Close connection after a timeout error. If this is a HTTP2
+	// connection this ensures that next interval a new connection will be
+	// used and name lookup will be performed.
+	//   https://github.com/golang/go/issues/36026
+	if err, ok := err.(*url.Error); ok && err.Timeout() {
+		client.CloseIdleConnections()
+	}
+}

internal/internal.go

@@ -3,16 +3,24 @@ package internal
 import (
 	"bufio"
 	"bytes"
-	"crypto/rand"
+	"compress/gzip"
+	"context"
 	"errors"
-	"log"
-	"math/big"
+	"fmt"
+	"io"
+	"math"
+	"math/rand"
 	"os"
 	"os/exec"
+	"runtime"
 	"strconv"
 	"strings"
+	"sync"
+	"syscall"
 	"time"
 	"unicode"
+
+	"github.com/alecthomas/units"
 )
 
 const alphanum string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
@@ -21,13 +29,52 @@ var (
 	TimeoutErr = errors.New("Command timed out.")
 
 	NotImplementedError = errors.New("not implemented yet")
+
+	VersionAlreadySetError = errors.New("version has already been set")
 )
 
+// Set via the main module
+var version string
+
 // Duration just wraps time.Duration
 type Duration struct {
 	Duration time.Duration
 }
 
+// Size just wraps an int64
+type Size struct {
+	Size int64
+}
+
+type Number struct {
+	Value float64
+}
+
+type ReadWaitCloser struct {
+	pipeReader *io.PipeReader
+	wg         sync.WaitGroup
+}
+
+// SetVersion sets the telegraf agent version
+func SetVersion(v string) error {
+	if version != "" {
+		return VersionAlreadySetError
+	}
+	version = v
+	return nil
+}
+
+// Version returns the telegraf agent version
+func Version() string {
+	return version
+}
+
+// ProductToken returns a tag for Telegraf that can be used in user agents.
+func ProductToken() string {
+	return fmt.Sprintf("Telegraf/%s Go/%s",
+		Version(), strings.TrimPrefix(runtime.Version(), "go"))
+}
+
 // UnmarshalTOML parses the duration from the TOML config file
 func (d *Duration) UnmarshalTOML(b []byte) error {
 	var err error
@@ -63,6 +110,37 @@ func (d *Duration) UnmarshalTOML(b []byte) error {
 	return nil
 }
 
+func (s *Size) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	val, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		s.Size = val
+		return nil
+	}
+	uq, err := strconv.Unquote(string(b))
+	if err != nil {
+		return err
+	}
+	val, err = units.ParseStrictBytes(uq)
+	if err != nil {
+		return err
+	}
+	s.Size = val
+	return nil
+}
+
+func (n *Number) UnmarshalTOML(b []byte) error {
+	value, err := strconv.ParseFloat(string(b), 64)
+	if err != nil {
+		return err
+	}
+
+	n.Value = value
+	return nil
+}
+
 // ReadLines reads contents from a file and splits them by new lines.
 // A convenience wrapper to ReadLinesOffsetN(filename, 0, -1).
 func ReadLines(filename string) ([]string, error) {
@@ -125,51 +203,6 @@ func SnakeCase(in string) string {
 	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.
@@ -177,12 +210,8 @@ 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()
-	}
+	sleepns := rand.Int63n(max.Nanoseconds())
 
 	t := time.NewTimer(time.Nanosecond * time.Duration(sleepns))
 	select {
@@ -193,3 +222,203 @@ func RandomSleep(max time.Duration, shutdown chan struct{}) {
 		return
 	}
 }
+
+// RandomDuration returns a random duration between 0 and max.
+func RandomDuration(max time.Duration) time.Duration {
+	if max == 0 {
+		return 0
+	}
+
+	sleepns := rand.Int63n(max.Nanoseconds())
+
+	return time.Duration(sleepns)
+}
+
+// SleepContext sleeps until the context is closed or the duration is reached.
+func SleepContext(ctx context.Context, duration time.Duration) error {
+	if duration == 0 {
+		return nil
+	}
+
+	t := time.NewTimer(duration)
+	select {
+	case <-t.C:
+		return nil
+	case <-ctx.Done():
+		t.Stop()
+		return ctx.Err()
+	}
+}
+
+// AlignDuration returns the duration until next aligned interval.
+// If the current time is aligned a 0 duration is returned.
+func AlignDuration(tm time.Time, interval time.Duration) time.Duration {
+	return AlignTime(tm, interval).Sub(tm)
+}
+
+// AlignTime returns the time of the next aligned interval.
+// If the current time is aligned the current time is returned.
+func AlignTime(tm time.Time, interval time.Duration) time.Time {
+	truncated := tm.Truncate(interval)
+	if truncated == tm {
+		return tm
+	}
+	return truncated.Add(interval)
+}
+
+// Exit status takes the error from exec.Command
+// and returns the exit status and true
+// if error is not exit status, will return 0 and false
+func ExitStatus(err error) (int, bool) {
+	if exiterr, ok := err.(*exec.ExitError); ok {
+		if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
+			return status.ExitStatus(), true
+		}
+	}
+	return 0, false
+}
+
+func (r *ReadWaitCloser) Close() error {
+	err := r.pipeReader.Close()
+	r.wg.Wait() // wait for the gzip goroutine finish
+	return err
+}
+
+// CompressWithGzip takes an io.Reader as input and pipes
+// it through a gzip.Writer returning an io.Reader containing
+// the gzipped data.
+// An error is returned if passing data to the gzip.Writer fails
+func CompressWithGzip(data io.Reader) (io.ReadCloser, error) {
+	pipeReader, pipeWriter := io.Pipe()
+	gzipWriter := gzip.NewWriter(pipeWriter)
+
+	rc := &ReadWaitCloser{
+		pipeReader: pipeReader,
+	}
+
+	rc.wg.Add(1)
+	var err error
+	go func() {
+		_, err = io.Copy(gzipWriter, data)
+		gzipWriter.Close()
+		// subsequent reads from the read half of the pipe will
+		// return no bytes and the error err, or EOF if err is nil.
+		pipeWriter.CloseWithError(err)
+		rc.wg.Done()
+	}()
+
+	return pipeReader, err
+}
+
+// ParseTimestamp parses a Time according to the standard Telegraf options.
+// These are generally displayed in the toml similar to:
+//   json_time_key= "timestamp"
+//   json_time_format = "2006-01-02T15:04:05Z07:00"
+//   json_timezone = "America/Los_Angeles"
+//
+// The format can be one of "unix", "unix_ms", "unix_us", "unix_ns", or a Go
+// time layout suitable for time.Parse.
+//
+// When using the "unix" format, a optional fractional component is allowed.
+// Specific unix time precisions cannot have a fractional component.
+//
+// Unix times may be an int64, float64, or string.  When using a Go format
+// string the timestamp must be a string.
+//
+// The location is a location string suitable for time.LoadLocation.  Unix
+// times do not use the location string, a unix time is always return in the
+// UTC location.
+func ParseTimestamp(format string, timestamp interface{}, location string) (time.Time, error) {
+	switch format {
+	case "unix", "unix_ms", "unix_us", "unix_ns":
+		return parseUnix(format, timestamp)
+	default:
+		if location == "" {
+			location = "UTC"
+		}
+		return parseTime(format, timestamp, location)
+	}
+}
+
+func parseUnix(format string, timestamp interface{}) (time.Time, error) {
+	integer, fractional, err := parseComponents(timestamp)
+	if err != nil {
+		return time.Unix(0, 0), err
+	}
+
+	switch strings.ToLower(format) {
+	case "unix":
+		return time.Unix(integer, fractional).UTC(), nil
+	case "unix_ms":
+		return time.Unix(0, integer*1e6).UTC(), nil
+	case "unix_us":
+		return time.Unix(0, integer*1e3).UTC(), nil
+	case "unix_ns":
+		return time.Unix(0, integer).UTC(), nil
+	default:
+		return time.Unix(0, 0), errors.New("unsupported type")
+	}
+}
+
+// Returns the integers before and after an optional decimal point.  Both '.'
+// and ',' are supported for the decimal point.  The timestamp can be an int64,
+// float64, or string.
+//   ex: "42.5" -> (42, 5, nil)
+func parseComponents(timestamp interface{}) (int64, int64, error) {
+	switch ts := timestamp.(type) {
+	case string:
+		parts := strings.SplitN(ts, ".", 2)
+		if len(parts) == 2 {
+			return parseUnixTimeComponents(parts[0], parts[1])
+		}
+
+		parts = strings.SplitN(ts, ",", 2)
+		if len(parts) == 2 {
+			return parseUnixTimeComponents(parts[0], parts[1])
+		}
+
+		integer, err := strconv.ParseInt(ts, 10, 64)
+		if err != nil {
+			return 0, 0, err
+		}
+		return integer, 0, nil
+	case int64:
+		return ts, 0, nil
+	case float64:
+		integer, fractional := math.Modf(ts)
+		return int64(integer), int64(fractional * 1e9), nil
+	default:
+		return 0, 0, errors.New("unsupported type")
+	}
+}
+
+func parseUnixTimeComponents(first, second string) (int64, int64, error) {
+	integer, err := strconv.ParseInt(first, 10, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	// Convert to nanoseconds, dropping any greater precision.
+	buf := []byte("000000000")
+	copy(buf, second)
+
+	fractional, err := strconv.ParseInt(string(buf), 10, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+	return integer, fractional, nil
+}
+
+// ParseTime parses a string timestamp according to the format string.
+func parseTime(format string, timestamp interface{}, location string) (time.Time, error) {
+	switch ts := timestamp.(type) {
+	case string:
+		loc, err := time.LoadLocation(location)
+		if err != nil {
+			return time.Unix(0, 0), err
+		}
+		return time.ParseInLocation(format, ts, loc)
+	default:
+		return time.Unix(0, 0), errors.New("unsupported type")
+	}
+}

internal/internal_test.go

@@ -1,11 +1,19 @@
 package internal
 
 import (
+	"bytes"
+	"compress/gzip"
+	"crypto/rand"
+	"io"
+	"io/ioutil"
+	"log"
 	"os/exec"
+	"regexp"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type SnakeTest struct {
@@ -60,6 +68,30 @@ func TestRunTimeout(t *testing.T) {
 	assert.True(t, elapsed < time.Millisecond*75)
 }
 
+// Verifies behavior of a command that doesn't get killed.
+func TestRunTimeoutFastExit(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping test due to random failures.")
+	}
+	if echobin == "" {
+		t.Skip("'echo' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(echobin)
+	start := time.Now()
+	err := RunTimeout(cmd, time.Millisecond*20)
+	buf := &bytes.Buffer{}
+	log.SetOutput(buf)
+	elapsed := time.Since(start)
+
+	require.NoError(t, err)
+	// Verify that command gets killed in 20ms, with some breathing room
+	assert.True(t, elapsed < time.Millisecond*75)
+
+	// Verify "process already finished" log doesn't occur.
+	time.Sleep(time.Millisecond * 75)
+	require.Equal(t, "", buf.String())
+}
+
 func TestCombinedOutputTimeout(t *testing.T) {
 	// TODO: Fix this test
 	t.Skip("Test failing too often, skip for now and revisit later.")
@@ -162,3 +194,298 @@ func TestDuration(t *testing.T) {
 	d.UnmarshalTOML([]byte(`1.5`))
 	assert.Equal(t, time.Second, d.Duration)
 }
+
+func TestSize(t *testing.T) {
+	var s Size
+
+	s.UnmarshalTOML([]byte(`"1B"`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`1`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`'1'`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`"1GB"`))
+	assert.Equal(t, int64(1000*1000*1000), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`"12GiB"`))
+	assert.Equal(t, int64(12*1024*1024*1024), s.Size)
+}
+
+func TestCompressWithGzip(t *testing.T) {
+	testData := "the quick brown fox jumps over the lazy dog"
+	inputBuffer := bytes.NewBuffer([]byte(testData))
+
+	outputBuffer, err := CompressWithGzip(inputBuffer)
+	assert.NoError(t, err)
+
+	gzipReader, err := gzip.NewReader(outputBuffer)
+	assert.NoError(t, err)
+	defer gzipReader.Close()
+
+	output, err := ioutil.ReadAll(gzipReader)
+	assert.NoError(t, err)
+
+	assert.Equal(t, testData, string(output))
+}
+
+type mockReader struct {
+	readN uint64 // record the number of calls to Read
+}
+
+func (r *mockReader) Read(p []byte) (n int, err error) {
+	r.readN++
+	return rand.Read(p)
+}
+
+func TestCompressWithGzipEarlyClose(t *testing.T) {
+	mr := &mockReader{}
+
+	rc, err := CompressWithGzip(mr)
+	assert.NoError(t, err)
+
+	n, err := io.CopyN(ioutil.Discard, rc, 10000)
+	assert.NoError(t, err)
+	assert.Equal(t, int64(10000), n)
+
+	r1 := mr.readN
+	err = rc.Close()
+	assert.NoError(t, err)
+
+	n, err = io.CopyN(ioutil.Discard, rc, 10000)
+	assert.Error(t, io.EOF, err)
+	assert.Equal(t, int64(0), n)
+
+	r2 := mr.readN
+	// no more read to the source after closing
+	assert.Equal(t, r1, r2)
+}
+
+func TestVersionAlreadySet(t *testing.T) {
+	err := SetVersion("foo")
+	assert.Nil(t, err)
+
+	err = SetVersion("bar")
+
+	assert.NotNil(t, err)
+	assert.IsType(t, VersionAlreadySetError, err)
+
+	assert.Equal(t, "foo", Version())
+}
+
+func TestAlignDuration(t *testing.T) {
+	tests := []struct {
+		name     string
+		now      time.Time
+		interval time.Duration
+		expected time.Duration
+	}{
+		{
+			name:     "aligned",
+			now:      time.Date(2018, 1, 1, 1, 1, 0, 0, time.UTC),
+			interval: 10 * time.Second,
+			expected: 0 * time.Second,
+		},
+		{
+			name:     "standard interval",
+			now:      time.Date(2018, 1, 1, 1, 1, 1, 0, time.UTC),
+			interval: 10 * time.Second,
+			expected: 9 * time.Second,
+		},
+		{
+			name:     "odd interval",
+			now:      time.Date(2018, 1, 1, 1, 1, 1, 0, time.UTC),
+			interval: 3 * time.Second,
+			expected: 2 * time.Second,
+		},
+		{
+			name:     "sub second interval",
+			now:      time.Date(2018, 1, 1, 1, 1, 0, 5e8, time.UTC),
+			interval: 1 * time.Second,
+			expected: 500 * time.Millisecond,
+		},
+		{
+			name:     "non divisible not aligned on minutes",
+			now:      time.Date(2018, 1, 1, 1, 0, 0, 0, time.UTC),
+			interval: 1*time.Second + 100*time.Millisecond,
+			expected: 400 * time.Millisecond,
+		},
+		{
+			name:     "long interval",
+			now:      time.Date(2018, 1, 1, 1, 1, 0, 0, time.UTC),
+			interval: 1 * time.Hour,
+			expected: 59 * time.Minute,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual := AlignDuration(tt.now, tt.interval)
+			require.Equal(t, tt.expected, actual)
+		})
+	}
+}
+
+func TestAlignTime(t *testing.T) {
+	rfc3339 := func(value string) time.Time {
+		t, _ := time.Parse(time.RFC3339, value)
+		return t
+	}
+
+	tests := []struct {
+		name     string
+		now      time.Time
+		interval time.Duration
+		expected time.Time
+	}{
+		{
+			name:     "aligned",
+			now:      rfc3339("2018-01-01T01:01:00Z"),
+			interval: 10 * time.Second,
+			expected: rfc3339("2018-01-01T01:01:00Z"),
+		},
+		{
+			name:     "aligned",
+			now:      rfc3339("2018-01-01T01:01:01Z"),
+			interval: 10 * time.Second,
+			expected: rfc3339("2018-01-01T01:01:10Z"),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual := AlignTime(tt.now, tt.interval)
+			require.Equal(t, tt.expected, actual)
+		})
+	}
+}
+
+func TestParseTimestamp(t *testing.T) {
+	rfc3339 := func(value string) time.Time {
+		tm, err := time.Parse(time.RFC3339Nano, value)
+		if err != nil {
+			panic(err)
+		}
+		return tm
+	}
+
+	tests := []struct {
+		name      string
+		format    string
+		timestamp interface{}
+		location  string
+		expected  time.Time
+		err       bool
+	}{
+		{
+			name:      "parse layout string in utc",
+			format:    "2006-01-02 15:04:05",
+			timestamp: "2019-02-20 21:50:34",
+			location:  "UTC",
+			expected:  rfc3339("2019-02-20T21:50:34Z"),
+		},
+		{
+			name:      "parse layout string with invalid timezone",
+			format:    "2006-01-02 15:04:05",
+			timestamp: "2019-02-20 21:50:34",
+			location:  "InvalidTimeZone",
+			err:       true,
+		},
+		{
+			name:      "layout regression 6386",
+			format:    "02.01.2006 15:04:05",
+			timestamp: "09.07.2019 00:11:00",
+			expected:  rfc3339("2019-07-09T00:11:00Z"),
+		},
+		{
+			name:      "default location is utc",
+			format:    "2006-01-02 15:04:05",
+			timestamp: "2019-02-20 21:50:34",
+			expected:  rfc3339("2019-02-20T21:50:34Z"),
+		},
+		{
+			name:      "unix seconds without fractional",
+			format:    "unix",
+			timestamp: "1568338208",
+			expected:  rfc3339("2019-09-13T01:30:08Z"),
+		},
+		{
+			name:      "unix seconds with fractional",
+			format:    "unix",
+			timestamp: "1568338208.500",
+			expected:  rfc3339("2019-09-13T01:30:08.500Z"),
+		},
+		{
+			name:      "unix seconds with fractional and comma decimal point",
+			format:    "unix",
+			timestamp: "1568338208,500",
+			expected:  rfc3339("2019-09-13T01:30:08.500Z"),
+		},
+		{
+			name:      "unix seconds extra precision",
+			format:    "unix",
+			timestamp: "1568338208.00000050042",
+			expected:  rfc3339("2019-09-13T01:30:08.000000500Z"),
+		},
+		{
+			name:      "unix seconds integer",
+			format:    "unix",
+			timestamp: int64(1568338208),
+			expected:  rfc3339("2019-09-13T01:30:08Z"),
+		},
+		{
+			name:      "unix seconds float",
+			format:    "unix",
+			timestamp: float64(1568338208.500),
+			expected:  rfc3339("2019-09-13T01:30:08.500Z"),
+		},
+		{
+			name:      "unix milliseconds",
+			format:    "unix_ms",
+			timestamp: "1568338208500",
+			expected:  rfc3339("2019-09-13T01:30:08.500Z"),
+		},
+		{
+			name:      "unix milliseconds with fractional is ignored",
+			format:    "unix_ms",
+			timestamp: "1568338208500.42",
+			expected:  rfc3339("2019-09-13T01:30:08.500Z"),
+		},
+		{
+			name:      "unix microseconds",
+			format:    "unix_us",
+			timestamp: "1568338208000500",
+			expected:  rfc3339("2019-09-13T01:30:08.000500Z"),
+		},
+		{
+			name:      "unix nanoseconds",
+			format:    "unix_ns",
+			timestamp: "1568338208000000500",
+			expected:  rfc3339("2019-09-13T01:30:08.000000500Z"),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tm, err := ParseTimestamp(tt.format, tt.timestamp, tt.location)
+			if tt.err {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, tt.expected, tm)
+			}
+		})
+	}
+}
+
+func TestProductToken(t *testing.T) {
+	token := ProductToken()
+	// Telegraf version depends on the call to SetVersion, it cannot be set
+	// multiple times and is not thread-safe.
+	re := regexp.MustCompile(`^Telegraf/[^\s]+ Go/\d+.\d+(.\d+)?$`)
+	require.True(t, re.MatchString(token), token)
+}

internal/models/makemetric.go

@@ -1,86 +0,0 @@
-package models
-
-import (
-	"log"
-	"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
-		}
-	}
-
-	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

@@ -1,166 +0,0 @@
-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

@@ -1,192 +0,0 @@
-package models
-
-import (
-	"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))
-}
-
-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

@@ -1,102 +0,0 @@
-package models
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/plugins/serializers/influx"
-	"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 {
-		s := influx.NewSerializer()
-		s.SetFieldSortOrder(influx.SortFields)
-		octets, err := s.Serialize(m)
-		if err == nil {
-			fmt.Print("> " + string(octets))
-		}
-	}
-
-	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_output.go

@@ -1,194 +0,0 @@
-package models
-
-import (
-	"log"
-	"sync"
-	"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
-
-	// Guards against concurrent calls to the Output as described in #3009
-	sync.Mutex
-}
-
-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.Set(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) {
-	if m == nil {
-		return
-	}
-	// 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()
-	ro.BufferSize.Set(int64(nFails + nMetrics))
-	log.Printf("D! Output [%s] buffer fullness: %d / %d metrics. ",
-		ro.Name, nFails+nMetrics, ro.MetricBufferLimit)
-	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
-	}
-	ro.Lock()
-	defer ro.Unlock()
-	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.WriteTime.Incr(elapsed.Nanoseconds())
-	}
-	return err
-}
-
-// OutputConfig containing name and filter
-type OutputConfig struct {
-	Name   string
-	Filter Filter
-}

internal/models/running_processor.go

@@ -1,51 +0,0 @@
-package models
-
-import (
-	"sync"
-
-	"github.com/influxdata/telegraf"
-)
-
-type RunningProcessor struct {
-	Name string
-
-	sync.Mutex
-	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 {
-	rp.Lock()
-	defer rp.Unlock()
-
-	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

@@ -1,117 +0,0 @@
-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)
-}

internal/rotate/file_writer.go

@@ -0,0 +1,185 @@
+package rotate
+
+// Rotating things
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+// FilePerm defines the permissions that Writer will use for all
+// the files it creates.
+const (
+	FilePerm   = os.FileMode(0644)
+	DateFormat = "2006-01-02"
+)
+
+// FileWriter implements the io.Writer interface and writes to the
+// filename specified.
+// Will rotate at the specified interval and/or when the current file size exceeds maxSizeInBytes
+// At rotation time, current file is renamed and a new file is created.
+// If the number of archives exceeds maxArchives, older files are deleted.
+type FileWriter struct {
+	filename                 string
+	filenameRotationTemplate string
+	current                  *os.File
+	interval                 time.Duration
+	maxSizeInBytes           int64
+	maxArchives              int
+	expireTime               time.Time
+	bytesWritten             int64
+	sync.Mutex
+}
+
+// NewFileWriter creates a new file writer.
+func NewFileWriter(filename string, interval time.Duration, maxSizeInBytes int64, maxArchives int) (io.WriteCloser, error) {
+	if interval == 0 && maxSizeInBytes <= 0 {
+		// No rotation needed so a basic io.Writer will do the trick
+		return openFile(filename)
+	}
+
+	w := &FileWriter{
+		filename:                 filename,
+		interval:                 interval,
+		maxSizeInBytes:           maxSizeInBytes,
+		maxArchives:              maxArchives,
+		filenameRotationTemplate: getFilenameRotationTemplate(filename),
+	}
+
+	if err := w.openCurrent(); err != nil {
+		return nil, err
+	}
+
+	return w, nil
+}
+
+func openFile(filename string) (*os.File, error) {
+	return os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_APPEND, FilePerm)
+}
+
+func getFilenameRotationTemplate(filename string) string {
+	// Extract the file extension
+	fileExt := filepath.Ext(filename)
+	// Remove the file extension from the filename (if any)
+	stem := strings.TrimSuffix(filename, fileExt)
+	return stem + ".%s-%s" + fileExt
+}
+
+// Write writes p to the current file, then checks to see if
+// rotation is necessary.
+func (w *FileWriter) Write(p []byte) (n int, err error) {
+	w.Lock()
+	defer w.Unlock()
+	if n, err = w.current.Write(p); err != nil {
+		return 0, err
+	}
+	w.bytesWritten += int64(n)
+
+	if err = w.rotateIfNeeded(); err != nil {
+		return 0, err
+	}
+
+	return n, nil
+}
+
+// Close closes the current file.  Writer is unusable after this
+// is called.
+func (w *FileWriter) Close() (err error) {
+	w.Lock()
+	defer w.Unlock()
+
+	// Rotate before closing
+	if err = w.rotate(); err != nil {
+		return err
+	}
+
+	w.current = nil
+	return nil
+}
+
+func (w *FileWriter) openCurrent() (err error) {
+	// In case ModTime() fails, we use time.Now()
+	w.expireTime = time.Now().Add(w.interval)
+	w.bytesWritten = 0
+	w.current, err = openFile(w.filename)
+
+	if err != nil {
+		return err
+	}
+
+	// Goal here is to rotate old pre-existing files.
+	// For that we use fileInfo.ModTime, instead of time.Now().
+	// Example: telegraf is restarted every 23 hours and
+	// the rotation interval is set to 24 hours.
+	// With time.now() as a reference we'd never rotate the file.
+	if fileInfo, err := w.current.Stat(); err == nil {
+		w.expireTime = fileInfo.ModTime().Add(w.interval)
+		w.bytesWritten = fileInfo.Size()
+	}
+
+	if err = w.rotateIfNeeded(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (w *FileWriter) rotateIfNeeded() error {
+	if (w.interval > 0 && time.Now().After(w.expireTime)) ||
+		(w.maxSizeInBytes > 0 && w.bytesWritten >= w.maxSizeInBytes) {
+		if err := w.rotate(); err != nil {
+			//Ignore rotation errors and keep the log open
+			fmt.Printf("unable to rotate the file '%s', %s", w.filename, err.Error())
+		}
+		return w.openCurrent()
+	}
+	return nil
+}
+
+func (w *FileWriter) rotate() (err error) {
+	if err = w.current.Close(); err != nil {
+		return err
+	}
+
+	// Use year-month-date for readability, unix time to make the file name unique with second precision
+	now := time.Now()
+	rotatedFilename := fmt.Sprintf(w.filenameRotationTemplate, now.Format(DateFormat), strconv.FormatInt(now.Unix(), 10))
+	if err = os.Rename(w.filename, rotatedFilename); err != nil {
+		return err
+	}
+
+	if err = w.purgeArchivesIfNeeded(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (w *FileWriter) purgeArchivesIfNeeded() (err error) {
+	if w.maxArchives == -1 {
+		//Skip archiving
+		return nil
+	}
+
+	var matches []string
+	if matches, err = filepath.Glob(fmt.Sprintf(w.filenameRotationTemplate, "*", "*")); err != nil {
+		return err
+	}
+
+	//if there are more archives than the configured maximum, then purge older files
+	if len(matches) > w.maxArchives {
+		//sort files alphanumerically to delete older files first
+		sort.Strings(matches)
+		for _, filename := range matches[:len(matches)-w.maxArchives] {
+			if err = os.Remove(filename); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

internal/rotate/file_writer_test.go

@@ -0,0 +1,148 @@
+package rotate
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestFileWriter_NoRotation(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationNo")
+	require.NoError(t, err)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test"), 0, 0, 0)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	_, err = writer.Write([]byte("Hello World"))
+	require.NoError(t, err)
+	_, err = writer.Write([]byte("Hello World 2"))
+	require.NoError(t, err)
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 1, len(files))
+}
+
+func TestFileWriter_TimeRotation(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationTime")
+	require.NoError(t, err)
+	interval, _ := time.ParseDuration("1s")
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test"), interval, 0, -1)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	_, err = writer.Write([]byte("Hello World"))
+	require.NoError(t, err)
+	time.Sleep(1 * time.Second)
+	_, err = writer.Write([]byte("Hello World 2"))
+	require.NoError(t, err)
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 2, len(files))
+}
+
+func TestFileWriter_ReopenTimeRotation(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationTime")
+	require.NoError(t, err)
+	interval, _ := time.ParseDuration("1s")
+	filePath := filepath.Join(tempDir, "test.log")
+	err = ioutil.WriteFile(filePath, []byte("Hello World"), 0644)
+	time.Sleep(1 * time.Second)
+	assert.NoError(t, err)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test.log"), interval, 0, -1)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 2, len(files))
+}
+
+func TestFileWriter_SizeRotation(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationSize")
+	require.NoError(t, err)
+	maxSize := int64(9)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test.log"), 0, maxSize, -1)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	_, err = writer.Write([]byte("Hello World"))
+	require.NoError(t, err)
+	_, err = writer.Write([]byte("World 2"))
+	require.NoError(t, err)
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 2, len(files))
+}
+
+func TestFileWriter_ReopenSizeRotation(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationSize")
+	require.NoError(t, err)
+	maxSize := int64(12)
+	filePath := filepath.Join(tempDir, "test.log")
+	err = ioutil.WriteFile(filePath, []byte("Hello World"), 0644)
+	assert.NoError(t, err)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test.log"), 0, maxSize, -1)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	_, err = writer.Write([]byte("Hello World Again"))
+	require.NoError(t, err)
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 2, len(files))
+}
+
+func TestFileWriter_DeleteArchives(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationDeleteArchives")
+	require.NoError(t, err)
+	maxSize := int64(5)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test.log"), 0, maxSize, 2)
+	require.NoError(t, err)
+	defer func() { writer.Close(); os.RemoveAll(tempDir) }()
+
+	_, err = writer.Write([]byte("First file"))
+	require.NoError(t, err)
+	// File names include the date with second precision
+	// So, to force rotation with different file names
+	// we need to wait
+	time.Sleep(1 * time.Second)
+	_, err = writer.Write([]byte("Second file"))
+	require.NoError(t, err)
+	time.Sleep(1 * time.Second)
+	_, err = writer.Write([]byte("Third file"))
+	require.NoError(t, err)
+
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 3, len(files))
+
+	for _, tempFile := range files {
+		var bytes []byte
+		var err error
+		path := filepath.Join(tempDir, tempFile.Name())
+		if bytes, err = ioutil.ReadFile(path); err != nil {
+			t.Error(err.Error())
+			return
+		}
+		contents := string(bytes)
+
+		if contents != "" && contents != "Second file" && contents != "Third file" {
+			t.Error("Should have deleted the eldest log file")
+			return
+		}
+	}
+}
+
+func TestFileWriter_CloseRotates(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "RotationClose")
+	require.NoError(t, err)
+	defer os.RemoveAll(tempDir)
+	maxSize := int64(9)
+	writer, err := NewFileWriter(filepath.Join(tempDir, "test.log"), 0, maxSize, -1)
+	require.NoError(t, err)
+
+	writer.Close()
+
+	files, _ := ioutil.ReadDir(tempDir)
+	assert.Equal(t, 1, len(files))
+	assert.Regexp(t, "^test\\.[^\\.]+\\.log$", files[0].Name())
+}

internal/syslog/framing.go

@@ -0,0 +1,64 @@
+package syslog
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Framing represents the framing technique we expect the messages to come.
+type Framing int
+
+const (
+	// OctetCounting indicates the transparent framing technique for syslog transport.
+	OctetCounting Framing = iota
+	// NonTransparent indicates the non-transparent framing technique for syslog transport.
+	NonTransparent
+)
+
+func (f Framing) String() string {
+	switch f {
+	case OctetCounting:
+		return "OCTET-COUNTING"
+	case NonTransparent:
+		return "NON-TRANSPARENT"
+	}
+	return ""
+}
+
+// UnmarshalTOML implements ability to unmarshal framing from TOML files.
+func (f *Framing) UnmarshalTOML(data []byte) (err error) {
+	return f.UnmarshalText(data)
+}
+
+// UnmarshalText implements encoding.TextUnmarshaler
+func (f *Framing) UnmarshalText(data []byte) (err error) {
+	s := string(data)
+	switch strings.ToUpper(s) {
+	case `OCTET-COUNTING`:
+		fallthrough
+	case `"OCTET-COUNTING"`:
+		fallthrough
+	case `'OCTET-COUNTING'`:
+		*f = OctetCounting
+		return
+
+	case `NON-TRANSPARENT`:
+		fallthrough
+	case `"NON-TRANSPARENT"`:
+		fallthrough
+	case `'NON-TRANSPARENT'`:
+		*f = NonTransparent
+		return
+	}
+	*f = -1
+	return fmt.Errorf("unknown framing")
+}
+
+// MarshalText implements encoding.TextMarshaler
+func (f Framing) MarshalText() ([]byte, error) {
+	s := f.String()
+	if s != "" {
+		return []byte(s), nil
+	}
+	return nil, fmt.Errorf("unknown framing")
+}

internal/syslog/framing_test.go

@@ -0,0 +1,37 @@
+package syslog
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestFraming(t *testing.T) {
+	var f1 Framing
+	f1.UnmarshalTOML([]byte(`"non-transparent"`))
+	assert.Equal(t, NonTransparent, f1)
+
+	var f2 Framing
+	f2.UnmarshalTOML([]byte(`non-transparent`))
+	assert.Equal(t, NonTransparent, f2)
+
+	var f3 Framing
+	f3.UnmarshalTOML([]byte(`'non-transparent'`))
+	assert.Equal(t, NonTransparent, f3)
+
+	var f4 Framing
+	f4.UnmarshalTOML([]byte(`"octet-counting"`))
+	assert.Equal(t, OctetCounting, f4)
+
+	var f5 Framing
+	f5.UnmarshalTOML([]byte(`octet-counting`))
+	assert.Equal(t, OctetCounting, f5)
+
+	var f6 Framing
+	f6.UnmarshalTOML([]byte(`'octet-counting'`))
+	assert.Equal(t, OctetCounting, f6)
+
+	var f7 Framing
+	err := f7.UnmarshalTOML([]byte(`nope`))
+	assert.Equal(t, Framing(-1), f7)
+	assert.Error(t, err)
+}

internal/templating/engine_test.go

@@ -0,0 +1,77 @@
+package templating
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestEngineAlternateSeparator(t *testing.T) {
+	defaultTemplate, _ := NewDefaultTemplateWithPattern("topic*")
+	engine, err := NewEngine("_", defaultTemplate, []string{
+		"/ /*/*/* /measurement/origin/measurement*",
+	})
+	require.NoError(t, err)
+	name, tags, field, err := engine.Apply("/telegraf/host01/cpu")
+	require.NoError(t, err)
+	require.Equal(t, "telegraf_cpu", name)
+	require.Equal(t, map[string]string{
+		"origin": "host01",
+	}, tags)
+	require.Equal(t, "", field)
+}
+
+func TestEngineWithWildcardTemplate(t *testing.T) {
+	var (
+		defaultTmpl, err = NewDefaultTemplateWithPattern("measurement*")
+		templates        = []string{
+			"taskmanagerTask.alarm-detector.Assign.alarmDefinitionId metricsType.process.nodeId.x.alarmDefinitionId.measurement.field rule=1",
+			"taskmanagerTask.*.*.*.*                                 metricsType.process.nodeId.measurement rule=2",
+		}
+	)
+	require.NoError(t, err)
+
+	engine, err := NewEngine(".", defaultTmpl, templates)
+	require.NoError(t, err)
+
+	for _, testCase := range []struct {
+		line        string
+		measurement string
+		field       string
+		tags        map[string]string
+	}{
+		{
+			line:        "taskmanagerTask.alarm-detector.Assign.alarmDefinitionId.timeout_errors.duration.p75",
+			measurement: "duration",
+			field:       "p75",
+			tags: map[string]string{
+				"metricsType":       "taskmanagerTask",
+				"process":           "alarm-detector",
+				"nodeId":            "Assign",
+				"x":                 "alarmDefinitionId",
+				"alarmDefinitionId": "timeout_errors",
+				"rule":              "1",
+			},
+		},
+		{
+			line:        "taskmanagerTask.alarm-detector.Assign.numRecordsInPerSecond.m5_rate",
+			measurement: "numRecordsInPerSecond",
+			tags: map[string]string{
+				"metricsType": "taskmanagerTask",
+				"process":     "alarm-detector",
+				"nodeId":      "Assign",
+				"rule":        "2",
+			},
+		},
+	} {
+		t.Run(testCase.line, func(t *testing.T) {
+			measurement, tags, field, err := engine.Apply(testCase.line)
+			require.NoError(t, err)
+
+			assert.Equal(t, testCase.measurement, measurement)
+			assert.Equal(t, testCase.field, field)
+			assert.Equal(t, testCase.tags, tags)
+		})
+	}
+}

internal/templating/node.go

@@ -55,32 +55,44 @@ func (n *node) search(line string) *Template {
 
 // recursiveSearch performs the actual recursive search
 func (n *node) recursiveSearch(lineParts []string) *Template {
-	// Nothing to search
+	// nothing to search
 	if len(lineParts) == 0 || len(n.children) == 0 {
 		return n.template
 	}
 
-	// If last element is a wildcard, don't include it in this search since it's sorted
-	// to the end but lexicographically it would not always be and sort.Search assumes
-	// the slice is sorted.
-	length := len(n.children)
-	if n.children[length-1].value == "*" {
+	var (
+		hasWildcard bool
+		length      = len(n.children)
+	)
+
+	// exclude last child from search if it is a wildcard. sort.Search expects
+	// a lexicographically sorted set of children and we have artificially sorted
+	// wildcards to the end of the child set
+	// wildcards will be searched separately if no exact match is found
+	if hasWildcard = n.children[length-1].value == "*"; hasWildcard {
 		length--
 	}
 
-	// Find the index of child with an exact match
 	i := sort.Search(length, func(i int) bool {
 		return n.children[i].value >= lineParts[0]
 	})
 
-	// Found an exact match, so search that child sub-tree
-	if i < len(n.children) && n.children[i].value == lineParts[0] {
-		return n.children[i].recursiveSearch(lineParts[1:])
+	// given an exact match is found within children set
+	if i < length && n.children[i].value == lineParts[0] {
+		// descend into the matching node
+		if tmpl := n.children[i].recursiveSearch(lineParts[1:]); tmpl != nil {
+			// given a template is found return it
+			return tmpl
+		}
 	}
-	// Not an exact match, see if we have a wildcard child to search
-	if n.children[len(n.children)-1].value == "*" {
-		return n.children[len(n.children)-1].recursiveSearch(lineParts[1:])
+
+	// given no template is found and the last child is a wildcard
+	if hasWildcard {
+		// also search the wildcard child node
+		return n.children[length].recursiveSearch(lineParts[1:])
 	}
+
+	// fallback to returning template at this node
 	return n.template
 }
 

internal/templating/template.go

@@ -124,21 +124,16 @@ type templateSpecs []templateSpec
 // Less reports whether the element with
 // index j should sort before the element with index k.
 func (e templateSpecs) Less(j, k int) bool {
-	if len(e[j].filter) == 0 && len(e[k].filter) == 0 {
-		jlength := len(strings.Split(e[j].template, e[j].separator))
-		klength := len(strings.Split(e[k].template, e[k].separator))
-		return jlength < klength
-	}
-	if len(e[j].filter) == 0 {
+	jlen := len(e[j].filter)
+	klen := len(e[k].filter)
+	if jlen == 0 && klen != 0 {
 		return true
 	}
-	if len(e[k].filter) == 0 {
+	if klen == 0 && jlen != 0 {
 		return false
 	}
-
-	jlength := len(strings.Split(e[j].template, e[j].separator))
-	klength := len(strings.Split(e[k].template, e[k].separator))
-	return jlength < klength
+	return strings.Count(e[j].template, e[j].separator) <
+		strings.Count(e[k].template, e[k].separator)
 }
 
 // Swap swaps the elements with indexes i and j.

internal/templating/template_test.go

@@ -0,0 +1,14 @@
+package templating
+
+import "testing"
+
+func BenchmarkTemplateLess(b *testing.B) {
+	a := templateSpec{
+		template:  "aa|bb|cc|dd|ee|ff",
+		separator: "|",
+	}
+	specs := templateSpecs{a, a}
+	for i := 0; i < b.N; i++ {
+		specs.Less(0, 1)
+	}
+}

internal/tls/common.go

@@ -0,0 +1,38 @@
+package tls
+
+import "crypto/tls"
+
+var tlsVersionMap = map[string]uint16{
+	"TLS10": tls.VersionTLS10,
+	"TLS11": tls.VersionTLS11,
+	"TLS12": tls.VersionTLS12,
+	"TLS13": tls.VersionTLS13,
+}
+
+var tlsCipherMap = map[string]uint16{
+	"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305":    tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+	"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305":  tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
+	"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256":   tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+	"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384":   tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+	"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256":   tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
+	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA":      tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA":    tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+	"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA":      tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+	"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA":    tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+	"TLS_RSA_WITH_AES_128_GCM_SHA256":         tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
+	"TLS_RSA_WITH_AES_256_GCM_SHA384":         tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
+	"TLS_RSA_WITH_AES_128_CBC_SHA256":         tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
+	"TLS_RSA_WITH_AES_128_CBC_SHA":            tls.TLS_RSA_WITH_AES_128_CBC_SHA,
+	"TLS_RSA_WITH_AES_256_CBC_SHA":            tls.TLS_RSA_WITH_AES_256_CBC_SHA,
+	"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA":     tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
+	"TLS_RSA_WITH_3DES_EDE_CBC_SHA":           tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
+	"TLS_RSA_WITH_RC4_128_SHA":                tls.TLS_RSA_WITH_RC4_128_SHA,
+	"TLS_ECDHE_RSA_WITH_RC4_128_SHA":          tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
+	"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA":        tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
+	"TLS_AES_128_GCM_SHA256":                  tls.TLS_AES_128_GCM_SHA256,
+	"TLS_AES_256_GCM_SHA384":                  tls.TLS_AES_256_GCM_SHA384,
+	"TLS_CHACHA20_POLY1305_SHA256":            tls.TLS_CHACHA20_POLY1305_SHA256,
+}