add rss feed title

Add tags for the context name and engine ID

.circleci/config.yml

@@ -0,0 +1,219 @@
+---
+defaults:
+  defaults: &defaults
+    working_directory: '/go/src/github.com/influxdata/telegraf'
+    environment:
+      GOFLAGS: -p=8
+  go-1_13: &go-1_13
+    docker:
+      - image: 'quay.io/influxdb/telegraf-ci:1.13.11'
+  go-1_14: &go-1_14
+    docker:
+      - 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_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'
+          paths:
+            - '*'
+  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'
+      - run: 'make'
+      - run: 'make test'
+  test-go-1.13-386:
+    <<: [ *defaults, *go-1_13 ]
+    steps:
+      - attach_workspace:
+          at: '/go'
+      - run: 'GOARCH=386 make'
+      - run: 'GOARCH=386 make test'
+  test-go-1.14:
+    <<: [ *defaults, *go-1_14 ]
+    steps:
+      - attach_workspace:
+          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_14 ]
+    steps:
+      - attach_workspace:
+          at: '/go'
+      - run: 'make package-release'
+      - store_artifacts:
+          path: './build'
+          destination: 'build'
+  nightly:
+    <<: [ *defaults, *go-1_14 ]
+    steps:
+      - attach_workspace:
+          at: '/go'
+      - run: 'make package-nightly'
+      - store_artifacts:
+          path: './build'
+          destination: 'build'
+
+workflows:
+  version: 2
+  check:
+    jobs:
+      - 'macdeps':
+          filters:
+            tags:
+              only: /.*/
+      - 'deps':
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.13':
+          requires:
+            - 'deps'
+          filters:
+            tags:
+              only: /.*/
+      - 'test-go-1.13-386':
+          requires:
+            - 'deps'
+          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-1.13'
+            - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
+          filters:
+            tags:
+              only: /.*/
+            branches:
+              ignore: /.*/
+  nightly:
+    jobs:
+      - 'deps'
+      - 'test-go-1.13':
+          requires:
+            - 'deps'
+      - 'test-go-1.13-386':
+          requires:
+            - 'deps'
+      - 'test-go-1.14':
+          requires:
+            - 'deps'
+      - 'test-go-1.14-386':
+          requires:
+            - 'deps'
+      - 'nightly':
+          requires:
+            - 'test-go-1.13'
+            - 'test-go-1.13-386'
+            - 'test-go-1.14'
+            - 'test-go-1.14-386'
+    triggers:
+      - schedule:
+          cron: "0 7 * * *"
+          filters:
+            branches:
+              only:
+                - master

.gitattributes

@@ -0,0 +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

@@ -0,0 +1,45 @@
+---
+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

@@ -0,0 +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)] -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,5 @@
+### Required for all PRs:
+
+- [ ] Signed [CLA](https://influxdata.com/community/cla/).
+- [ ] Associated README.md updated.
+- [ ] Has appropriate unit tests.

.gitignore

@@ -1,6 +1,5 @@
-tivan
-.vagrant
+/build
 /telegraf
-.idea
-*~
-*#
+/telegraf.exe
+/telegraf.gz
+/vendor

CONTRIBUTING.md

@@ -1,300 +1,76 @@
-## 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 `plugins/inputs/all/all.go` or `plugins/outputs/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. [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.
 
-Public interfaces for inputs, outputs, metrics, and the accumulator can be found
-on the GoDoc
+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 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. `gdm save`
+**Unit Tests:**
 
-## 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 include in `telegraf -sample-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 "ok = true # indicate if everything is fine"
-}
-
-func (s *Simple) Gather(acc inputs.Accumulator) error {
-    if s.Ok {
-        acc.Add("state", "pretty good", nil)
-    } else {
-        acc.Add("state", "not great", nil)
-    }
-
-    return nil
-}
-
-func init() {
-    inputs.Add("simple", func() telegraf.Input { return &Simple{} })
-}
-```
-
-## 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. This can be "json", "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
-  data_format = "influx"
-```
-
-Below is the `Parser` interface.
-
-```go
-// Parser is an interface defining functions that a parser plugin must satisfy.
-type Parser interface {
-    // Parse takes a byte buffer separated by newlines
-    // ie, `cpu.usage.idle 90\ncpu.usage.busy 10`
-    // and parses it into telegraf metrics
-    Parse(buf []byte) ([]telegraf.Metric, error)
-
-    // ParseLine takes a single string metric
-    // ie, "cpu.usage.idle 90"
-    // and parses it into a telegraf metric.
-    ParseLine(line string) (telegraf.Metric, error)
-}
-```
-
-And you can view the code
-[here.](https://github.com/influxdata/telegraf/blob/henrypfhu-master/plugins/parsers/registry.go)
-
-## Service Input Plugins
-
-This section is for developers who want to create new "service" collection
-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
-`inputs.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 `outputs.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 -sample-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 "url = localhost"
-}
-
-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 _, pt := range points {
-        // write `pt` to the output sink here
-    }
-    return nil
-}
-
-func init() {
-    outputs.Add("simpleoutput", func() telegraf.Output { return &Simple{} })
-}
+Before opening a pull request you should run the linter checks and
+the short tests.
 
 ```
-
-## 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. This can be "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
-  data_format = "influx"
+make check
+make test
 ```
 
-## Service Output Plugins
+**Execute integration tests:**
 
-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.
+(Optional)
 
-Their interface is quite similar to a regular output, with the addition of `Start()`
-and `Stop()` methods.
+Running the integration tests requires several docker containers to be
+running.  You can start the containers with:
+```
+docker-compose up
+```
 
-### Service Output Guidelines
+And run the full test suite with:
+```
+make test-all
+```
 
-* Same as the `Output` guidelines, except that they must conform to the
-`output.ServiceOutput` interface.
+Use `make docker-kill` to stop the containers.
 
-## Unit Tests
 
-### Execute short tests
-
-execute `make test-short`
-
-### Execute long tests
-
-As Telegraf collects metrics from several third-party services it becomes a
-difficult task to mock each service as some of them have complicated protocols
-which would take some time to replicate.
-
-To overcome this situation we've decided to use docker containers to provide a
-fast and reproducible environment to test those services which require it.
-For other situations
-(i.e: https://github.com/influxdata/telegraf/blob/master/plugins/inputs/redis/redis_test.go)
-a simple mock will suffice.
-
-To execute Telegraf tests follow these simple steps:
-
-- Install docker following [these](https://docs.docker.com/installation/)
-instructions
-- execute `make test`
-
-**OSX users**: you will need to install `boot2docker` or `docker-machine`.
-The Makefile will assume that you have a `docker-machine` box called `default` to
-get the IP address.
-
-### Unit test troubleshooting
-
-Try cleaning up your test environment by executing `make docker-kill` and
-re-running
+[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

@@ -1,52 +0,0 @@
-git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git 617c801af238c3af2d9e72c5d4a0f02edad03ce5
-github.com/Shopify/sarama d37c73f2b2bce85f7fa16b6a550d26c5372892ef
-github.com/Sirupsen/logrus f7f79f729e0fbe2fcc061db48a9ba0263f588252
-github.com/amir/raidman 6a8e089bbe32e6b907feae5ba688841974b3c339
-github.com/aws/aws-sdk-go 87b1e60a50b09e4812dee560b33a238f67305804
-github.com/beorn7/perks b965b613227fddccbfffe13eae360ed3fa822f8d
-github.com/cenkalti/backoff 4dc77674aceaabba2c7e3da25d4c823edfb73f99
-github.com/dancannon/gorethink 6f088135ff288deb9d5546f4c71919207f891a70
-github.com/davecgh/go-spew 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
-github.com/eapache/go-resiliency b86b1ec0dd4209a588dc1285cdd471e73525c0b3
-github.com/eapache/queue ded5959c0d4e360646dc9e9908cff48666781367
-github.com/fsouza/go-dockerclient 7b651349f9479f5114913eefbfd3c4eeddd79ab4
-github.com/go-ini/ini afbd495e5aaea13597b5e14fe514ddeaa4d76fc3
-github.com/go-sql-driver/mysql 7c7f556282622f94213bc028b4d0a7b6151ba239
-github.com/golang/protobuf 6aaa8d47701fa6cf07e914ec01fde3d4a1fe79c3
-github.com/golang/snappy 723cc1e459b8eea2dea4583200fd60757d40097a
-github.com/gonuts/go-shellquote e842a11b24c6abfb3dd27af69a17f482e4b483c2
-github.com/gorilla/context 1c83b3eabd45b6d76072b66b746c20815fb2872d
-github.com/gorilla/mux 26a6070f849969ba72b72256e9f14cf519751690
-github.com/hailocab/go-hostpool e80d13ce29ede4452c43dea11e79b9bc8a15b478
-github.com/influxdata/config bae7cb98197d842374d3b8403905924094930f24
-github.com/influxdata/influxdb ef571fc104dc24b77cd3710c156cd95e5cfd7aa5
-github.com/jmespath/go-jmespath c01cf91b011868172fdcd9f41838e80c9d716264
-github.com/klauspost/crc32 999f3125931f6557b991b2f8472172bdfa578d38
-github.com/lib/pq 8ad2b298cadd691a77015666a5372eae5dbfac8f
-github.com/matttproud/golang_protobuf_extensions d0c3fe89de86839aecf2e0579c40ba3bb336a453
-github.com/mreiferson/go-snappystream 028eae7ab5c4c9e2d1cb4c4ca1e53259bbe7e504
-github.com/naoina/go-stringutil 6b638e95a32d0c1131db0e7fe83775cbea4a0d0b
-github.com/naoina/toml 751171607256bb66e64c9f0220c00662420c38e9
-github.com/nats-io/nats 6a83f1a633cfbfd90aa648ac99fb38c06a8b40df
-github.com/nsqio/go-nsq 2118015c120962edc5d03325c680daf3163a8b5f
-github.com/pmezard/go-difflib 792786c7400a136282c1664665ae0a8db921c6c2
-github.com/prometheus/client_golang 67994f177195311c3ea3d4407ed0175e34a4256f
-github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6
-github.com/prometheus/common 14ca1097bbe21584194c15e391a9dab95ad42a59
-github.com/prometheus/procfs 406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8
-github.com/samuel/go-zookeeper 218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f
-github.com/shirou/gopsutil e77438504d45b9985c99a75730fe65220ceea00e
-github.com/soniah/gosnmp b1b4f885b12c5dcbd021c5cee1c904110de6db7d
-github.com/streadway/amqp b4f3ceab0337f013208d31348b578d83c0064744
-github.com/stretchr/objx 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
-github.com/stretchr/testify f390dcf405f7b83c997eac1b06768bb9f44dec18
-github.com/wvanbergen/kafka 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
-github.com/wvanbergen/kazoo-go 0f768712ae6f76454f987c3356177e138df258f8
-github.com/zensqlmonitor/go-mssqldb ffe5510c6fa5e15e6d983210ab501c815b56b363
-golang.org/x/crypto 1f22c0103821b9390939b6776727195525381532
-golang.org/x/net 04b9de9b512f58addf28c9853d50ebef61c3953e
-golang.org/x/text 6d3c22c4525a4da167968fa2479be5524d2e8bd0
-gopkg.in/dancannon/gorethink.v1 6f088135ff288deb9d5546f4c71919207f891a70
-gopkg.in/fatih/pool.v2 cba550ebf9bce999a02e963296d4bc7a486cb715
-gopkg.in/mgo.v2 03c9f3ee4c14c8e51ee521a6a7d0425658dd6f64
-gopkg.in/yaml.v2 f7716cbe52baa25d2e9b0d0da546fcf909fc16b4

Godeps_windows

@@ -1,56 +0,0 @@
-git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git dbd8d5c40a582eb9adacde36b47932b3a3ad0034
-github.com/Shopify/sarama d37c73f2b2bce85f7fa16b6a550d26c5372892ef
-github.com/Sirupsen/logrus f7f79f729e0fbe2fcc061db48a9ba0263f588252
-github.com/StackExchange/wmi f3e2bae1e0cb5aef83e319133eabfee30013a4a5
-github.com/amir/raidman 6a8e089bbe32e6b907feae5ba688841974b3c339
-github.com/aws/aws-sdk-go 87b1e60a50b09e4812dee560b33a238f67305804
-github.com/beorn7/perks b965b613227fddccbfffe13eae360ed3fa822f8d
-github.com/cenkalti/backoff 4dc77674aceaabba2c7e3da25d4c823edfb73f99
-github.com/dancannon/gorethink 6f088135ff288deb9d5546f4c71919207f891a70
-github.com/davecgh/go-spew 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
-github.com/eapache/go-resiliency b86b1ec0dd4209a588dc1285cdd471e73525c0b3
-github.com/eapache/queue ded5959c0d4e360646dc9e9908cff48666781367
-github.com/fsouza/go-dockerclient 7b651349f9479f5114913eefbfd3c4eeddd79ab4
-github.com/go-ini/ini afbd495e5aaea13597b5e14fe514ddeaa4d76fc3
-github.com/go-ole/go-ole 50055884d646dd9434f16bbb5c9801749b9bafe4
-github.com/go-sql-driver/mysql 7c7f556282622f94213bc028b4d0a7b6151ba239
-github.com/golang/protobuf 6aaa8d47701fa6cf07e914ec01fde3d4a1fe79c3
-github.com/golang/snappy 723cc1e459b8eea2dea4583200fd60757d40097a
-github.com/gonuts/go-shellquote e842a11b24c6abfb3dd27af69a17f482e4b483c2
-github.com/gorilla/context 1c83b3eabd45b6d76072b66b746c20815fb2872d
-github.com/gorilla/mux 26a6070f849969ba72b72256e9f14cf519751690
-github.com/hailocab/go-hostpool e80d13ce29ede4452c43dea11e79b9bc8a15b478
-github.com/influxdata/config bae7cb98197d842374d3b8403905924094930f24
-github.com/influxdata/influxdb a9552fdd91361819a792f337e5d9998859732a67
-github.com/influxdb/influxdb a9552fdd91361819a792f337e5d9998859732a67
-github.com/jmespath/go-jmespath c01cf91b011868172fdcd9f41838e80c9d716264
-github.com/klauspost/crc32 999f3125931f6557b991b2f8472172bdfa578d38
-github.com/lib/pq 8ad2b298cadd691a77015666a5372eae5dbfac8f
-github.com/lxn/win 9a7734ea4db26bc593d52f6a8a957afdad39c5c1
-github.com/matttproud/golang_protobuf_extensions d0c3fe89de86839aecf2e0579c40ba3bb336a453
-github.com/mreiferson/go-snappystream 028eae7ab5c4c9e2d1cb4c4ca1e53259bbe7e504
-github.com/naoina/go-stringutil 6b638e95a32d0c1131db0e7fe83775cbea4a0d0b
-github.com/naoina/toml 751171607256bb66e64c9f0220c00662420c38e9
-github.com/nsqio/go-nsq 2118015c120962edc5d03325c680daf3163a8b5f
-github.com/pborman/uuid dee7705ef7b324f27ceb85a121c61f2c2e8ce988
-github.com/pmezard/go-difflib 792786c7400a136282c1664665ae0a8db921c6c2
-github.com/prometheus/client_golang 67994f177195311c3ea3d4407ed0175e34a4256f
-github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6
-github.com/prometheus/common 14ca1097bbe21584194c15e391a9dab95ad42a59
-github.com/prometheus/procfs 406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8
-github.com/samuel/go-zookeeper 218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f
-github.com/shirou/gopsutil e77438504d45b9985c99a75730fe65220ceea00e
-github.com/shirou/w32 ada3ba68f000aa1b58580e45c9d308fe0b7fc5c5
-github.com/soniah/gosnmp b1b4f885b12c5dcbd021c5cee1c904110de6db7d
-github.com/streadway/amqp b4f3ceab0337f013208d31348b578d83c0064744
-github.com/stretchr/objx 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
-github.com/stretchr/testify f390dcf405f7b83c997eac1b06768bb9f44dec18
-github.com/wvanbergen/kafka 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
-github.com/wvanbergen/kazoo-go 0f768712ae6f76454f987c3356177e138df258f8
-github.com/zensqlmonitor/go-mssqldb ffe5510c6fa5e15e6d983210ab501c815b56b363
-golang.org/x/net 04b9de9b512f58addf28c9853d50ebef61c3953e
-golang.org/x/text 6d3c22c4525a4da167968fa2479be5524d2e8bd0
-gopkg.in/dancannon/gorethink.v1 6f088135ff288deb9d5546f4c71919207f891a70
-gopkg.in/fatih/pool.v2 cba550ebf9bce999a02e963296d4bc7a486cb715
-gopkg.in/mgo.v2 03c9f3ee4c14c8e51ee521a6a7d0425658dd6f64
-gopkg.in/yaml.v2 f7716cbe52baa25d2e9b0d0da546fcf909fc16b4

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

@@ -1,105 +1,155 @@
-UNAME := $(shell sh -c 'uname')
-VERSION := $(shell sh -c 'git describe --always --tags')
+ifeq ($(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
+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 -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
 
-# Standard Telegraf build
-default: prepare build
-
-# Windows build
-windows: prepare-windows build-windows
-
-# Only run the build (no dependency grabbing)
-build:
-	go install -ldflags "-X main.Version=$(VERSION)" ./...
-
-build-windows:
-	go build -o telegraf.exe -ldflags \
-		"-X main.Version=$(VERSION)" \
-		./cmd/telegraf/telegraf.go
-
-build-for-docker:
-	CGO_ENABLED=0 GOOS=linux go -o telegraf -ldflags \
-					"-X main.Version=$(VERSION)" \
-					./cmd/telegraf/telegraf.go
-
-# Build with race detector
-dev: prepare
-	go build -race -ldflags "-X main.Version=$(VERSION)" ./...
-
-# run package script
-package:
-	./scripts/build.py --package --version="$(VERSION)" --platform=linux --arch=all --upload
-
-# Get dependencies and use gdm to checkout changesets
-prepare:
-	go get github.com/sparrc/gdm
-	gdm restore
-
-# Use the windows godeps file to prepare dependencies
-prepare-windows:
-	go get github.com/sparrc/gdm
-	gdm restore -f Godeps_windows
-
-# Run all docker containers necessary for unit tests
-docker-run:
-ifeq ($(UNAME), Darwin)
-	docker run --name kafka \
-		-e ADVERTISED_HOST=$(shell sh -c 'boot2docker ip || docker-machine ip default') \
-		-e ADVERTISED_PORT=9092 \
-		-p "2181:2181" -p "9092:9092" \
-		-d spotify/kafka
+LDFLAGS := $(LDFLAGS) -X main.commit=$(COMMIT) -X main.branch=$(BRANCH)
+ifdef VERSION
+	LDFLAGS += -X main.version=$(VERSION)
 endif
-ifeq ($(UNAME), Linux)
-	docker run --name kafka \
-		-e ADVERTISED_HOST=localhost \
-		-e ADVERTISED_PORT=9092 \
-		-p "2181:2181" -p "9092:9092" \
-		-d spotify/kafka
-endif
-	docker run --name mysql -p "3306:3306" -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -d mysql
-	docker run --name memcached -p "11211:11211" -d memcached
-	docker run --name postgres -p "5432:5432" -d postgres
-	docker run --name rabbitmq -p "15672:15672" -p "5672:5672" -d rabbitmq:3-management
-	docker run --name opentsdb -p "4242:4242" -d petergrace/opentsdb-docker
-	docker run --name redis -p "6379:6379" -d redis
-	docker run --name aerospike -p "3000:3000" -d aerospike
-	docker run --name nsq -p "4150:4150" -d nsqio/nsq /nsqd
-	docker run --name mqtt -p "1883:1883" -d ncarlier/mqtt
-	docker run --name riemann -p "5555:5555" -d blalor/riemann
-	docker run --name snmp -p "31161:31161/udp" -d titilambert/snmpsim
 
-# Run docker containers necessary for CircleCI unit tests
-docker-run-circle:
-	docker run --name kafka \
-		-e ADVERTISED_HOST=localhost \
-		-e ADVERTISED_PORT=9092 \
-		-p "2181:2181" -p "9092:9092" \
-		-d spotify/kafka
-	docker run --name opentsdb -p "4242:4242" -d petergrace/opentsdb-docker
-	docker run --name aerospike -p "3000:3000" -d aerospike
-	docker run --name nsq -p "4150:4150" -d nsqio/nsq /nsqd
-	docker run --name mqtt -p "1883:1883" -d ncarlier/mqtt
-	docker run --name riemann -p "5555:5555" -d blalor/riemann
-	docker run --name snmp -p "31161:31161/udp" -d titilambert/snmpsim
+.PHONY: all
+all:
+	@$(MAKE) --no-print-directory deps
+	@$(MAKE) --no-print-directory telegraf
 
-# Kill all docker containers, ignore errors
-docker-kill:
-	-docker kill nsq aerospike redis opentsdb rabbitmq postgres memcached mysql kafka mqtt riemann snmp
-	-docker rm nsq aerospike redis opentsdb rabbitmq postgres memcached mysql kafka mqtt riemann snmp
+.PHONY: deps
+deps:
+	go mod download
 
-# Run full unit tests using docker containers (includes setup and teardown)
-test: docker-kill docker-run
-	# Sleeping for kafka leadership election, TSDB setup, etc.
-	sleep 60
-	# SUCCESS, running tests
-	go test -race ./...
+.PHONY: telegraf
+telegraf:
+	go build -ldflags "$(LDFLAGS)" ./cmd/telegraf
 
-# Run "short" unit tests
-test-short:
-	go test -short ./...
+.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/
 
 .PHONY: test
+test:
+	go test -short ./...
+
+.PHONY: fmt
+fmt:
+	@gofmt -s -w $(filter-out plugins/parsers/influx/machine.go, $(GOFILES))
+
+.PHONY: fmtcheck
+fmtcheck:
+	@if [ ! -z "$(GOFMT)" ]; then \
+		echo "[ERROR] gofmt has found errors in the following files:"  ; \
+		echo "$(GOFMT)" ; \
+		echo "" ;\
+		echo "Run make fmt to fix them." ; \
+		exit 1 ;\
+	fi
+
+.PHONY: test-windows
+test-windows:
+	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/...
+
+.PHONY: vet
+vet:
+	@echo 'go vet $$(go list ./... | grep -v ./plugins/parsers/influx)'
+	@go vet $$(go list ./... | grep -v ./plugins/parsers/influx) ; if [ $$? -ne 0 ]; then \
+		echo ""; \
+		echo "go vet has found suspicious constructs. Please remediate any reported errors"; \
+		echo "to fix them before submitting code for review."; \
+		exit 1; \
+	fi
+
+.PHONY: tidy
+tidy:
+	go mod verify
+	go mod tidy
+	@if ! git diff --quiet go.mod go.sum; then \
+		echo "please run go mod tidy and check in changes"; \
+		exit 1; \
+	fi
+
+.PHONY: check
+check: fmtcheck vet
+	@$(MAKE) --no-print-directory tidy
+
+.PHONY: test-all
+test-all: fmtcheck vet
+	go test ./...
+
+.PHONY: check-deps
+check-deps:
+	./scripts/check-deps.sh
+
+.PHONY: package
+package:
+	./scripts/build.py --package --platform=all --arch=all
+
+.PHONY: package-release
+package-release:
+	./scripts/build.py --release --package --platform=all --arch=all \
+		--upload --bucket=dl.influxdata.com/telegraf/releases
+
+.PHONY: package-nightly
+package-nightly:
+	./scripts/build.py --nightly --package --platform=all --arch=all \
+		--upload --bucket=dl.influxdata.com/telegraf/nightlies
+
+.PHONY: clean
+clean:
+	rm -f telegraf
+	rm -f telegraf.exe
+
+.PHONY: docker-image
+docker-image:
+	docker build -f scripts/stretch.docker -t "telegraf:$(COMMIT)" .
+
+plugins/parsers/influx/machine.go: plugins/parsers/influx/machine.go.rl
+	ragel -Z -G2 $^ -o $@
+
+.PHONY: static
+static:
+	@echo "Building static linux binary..."
+	@CGO_ENABLED=0 \
+	GOOS=linux \
+	GOARCH=amd64 \
+	go build -ldflags "$(LDFLAGS)" ./cmd/telegraf
+
+.PHONY: plugin-%
+plugin-%:
+	@echo "Starting dev environment for $${$(@)} 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

@@ -1,238 +1,429 @@
-# Telegraf [![Circle CI](https://circleci.com/gh/influxdata/telegraf.svg?style=svg)](https://circleci.com/gh/influxdata/telegraf)
+# Telegraf [![Circle CI](https://circleci.com/gh/influxdata/telegraf.svg?style=svg)](https://circleci.com/gh/influxdata/telegraf) [![Docker pulls](https://img.shields.io/docker/pulls/library/telegraf.svg)](https://hub.docker.com/_/telegraf/)
 
-Telegraf is an agent written in Go for collecting metrics from the system it's
-running on, or from other services, and writing them into InfluxDB or other
-[outputs](https://github.com/influxdata/telegraf#supported-output-plugins).
+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
-from well known services (like Hadoop, Postgres, or Redis) and third party
-APIs (like Mailchimp, AWS CloudWatch, or Google Analytics).
+that developers in the community can easily add support for collecting
+metrics.
 
-New input and output plugins are designed to be easy to contribute,
-we'll eagerly accept pull
-requests and will manage the set of plugins that Telegraf supports.
-See the [contributing guide](CONTRIBUTING.md) for instructions on writing
-new plugins.
+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
+
+New plugins are designed to be easy to contribute, pull requests are welcomed
+and we work to incorporate as many pull requests as possible.
+
+## Try in Browser :rocket:
+
+You can try Telegraf right in your browser in the [Telegraf playground](https://rootnroll.com/d/telegraf/).
+
+## Contributing
+
+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 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:
 
-NOTE: Telegraf 0.10.x is **not** backwards-compatible with previous versions
-of telegraf, both in the database layout and the configuration file. 0.2.x
-will continue to be supported, see below for download links.
-
-For more details on the differences between Telegraf 0.2.x and 0.10.x, see
-the [release blog post](https://influxdata.com/blog/announcing-telegraf-0-10-0/).
-
-### Linux deb and rpm Packages:
-
-Latest:
-* http://get.influxdb.org/telegraf/telegraf_0.10.2-1_amd64.deb
-* http://get.influxdb.org/telegraf/telegraf-0.10.2-1.x86_64.rpm
-
-0.2.x:
-* http://get.influxdb.org/telegraf/telegraf_0.2.4_amd64.deb
-* http://get.influxdb.org/telegraf/telegraf-0.2.4-1.x86_64.rpm
-
-##### Package Instructions:
-
-* Telegraf binary is installed in `/usr/bin/telegraf`
-* Telegraf daemon configuration file is in `/etc/telegraf/telegraf.conf`
-* On sysv systems, the telegraf daemon can be controlled via
-`service telegraf [action]`
-* On systemd systems (such as Ubuntu 15+), the telegraf daemon can be
-controlled via `systemctl [action] telegraf`
-
-### yum/apt Repositories:
-
-There is a yum/apt repo available for the whole InfluxData stack, see
-[here](https://docs.influxdata.com/influxdb/v0.9/introduction/installation/#installation)
-for instructions, replacing the `influxdb` package name with `telegraf`.
-
-### Linux tarballs:
-
-Latest:
-* http://get.influxdb.org/telegraf/telegraf-0.10.2-1_linux_amd64.tar.gz
-* http://get.influxdb.org/telegraf/telegraf-0.10.2-1_linux_i386.tar.gz
-* http://get.influxdb.org/telegraf/telegraf-0.10.2-1_linux_arm.tar.gz
-
-0.2.x:
-* http://get.influxdb.org/telegraf/telegraf_linux_amd64_0.2.4.tar.gz
-* http://get.influxdb.org/telegraf/telegraf_linux_386_0.2.4.tar.gz
-* http://get.influxdb.org/telegraf/telegraf_linux_arm_0.2.4.tar.gz
-
-##### tarball Instructions:
-
-To install the full directory structure with config file, run:
-
-```
-sudo tar -C / -zxvf ./telegraf-0.10.2-1_linux_amd64.tar.gz
-```
-
-To extract only the binary, run:
-
-```
-tar -zxvf telegraf-0.10.2-1_linux_amd64.tar.gz --strip-components=3 ./usr/bin/telegraf
-```
+You can download the binaries directly from the [downloads](https://www.influxdata.com/downloads) page
+or from the [releases](https://github.com/influxdata/telegraf/releases) section.
 
 ### Ansible Role:
 
 Ansible role: https://github.com/rossmcdonald/telegraf
 
-### OSX via Homebrew:
-
-```
-brew update
-brew install telegraf
-```
-
 ### From Source:
 
-Telegraf manages dependencies via [gdm](https://github.com/sparrc/gdm),
-which gets installed via the Makefile
-if you don't have it already. You also must build with golang version 1.5+.
+Telegraf requires Go version 1.13 or newer, the Makefile requires GNU make.
 
-1. [Install Go](https://golang.org/doc/install)
-2. [Setup your GOPATH](https://golang.org/doc/code.html#GOPATH)
-3. Run `go get github.com/influxdata/telegraf`
-4. Run `cd $GOPATH/src/github.com/influxdata/telegraf`
-5. Run `make`
+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
+   ```
+
+### 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)
+- [telegraf_nightly_armel.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_armel.deb)
+- [telegraf-nightly.armel.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.armel.rpm)
+- [telegraf_nightly_armhf.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_armhf.deb)
+- [telegraf-nightly.armv6hl.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.armv6hl.rpm)
+- [telegraf-nightly_freebsd_amd64.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_freebsd_amd64.tar.gz)
+- [telegraf-nightly_freebsd_i386.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_freebsd_i386.tar.gz)
+- [telegraf_nightly_i386.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_i386.deb)
+- [telegraf-nightly.i386.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.i386.rpm)
+- [telegraf-nightly_linux_amd64.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_amd64.tar.gz)
+- [telegraf-nightly_linux_arm64.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_arm64.tar.gz)
+- [telegraf-nightly_linux_armel.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_armel.tar.gz)
+- [telegraf-nightly_linux_armhf.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_armhf.tar.gz)
+- [telegraf-nightly_linux_i386.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_i386.tar.gz)
+- [telegraf-nightly_linux_s390x.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_linux_s390x.tar.gz)
+- [telegraf_nightly_s390x.deb](https://dl.influxdata.com/telegraf/nightlies/telegraf_nightly_s390x.deb)
+- [telegraf-nightly.s390x.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.s390x.rpm)
+- [telegraf-nightly_windows_amd64.zip](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_windows_amd64.zip)
+- [telegraf-nightly_windows_i386.zip](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly_windows_i386.zip)
+- [telegraf-nightly.x86_64.rpm](https://dl.influxdata.com/telegraf/nightlies/telegraf-nightly.x86_64.rpm)
+- [telegraf-static-nightly_linux_amd64.tar.gz](https://dl.influxdata.com/telegraf/nightlies/telegraf-static-nightly_linux_amd64.tar.gz)
 
 ## How to use it:
 
-```console
-$ telegraf -help
-Telegraf, The plugin-driven server agent for collecting and reporting metrics.
+See usage with:
 
-Usage:
-
-  telegraf <flags>
-
-The flags are:
-
-  -config <file>     configuration file to load
-  -test              gather metrics once, print them to stdout, and exit
-  -sample-config     print out full sample configuration to stdout
-  -config-directory  directory containing additional *.conf files
-  -input-filter      filter the input plugins to enable, separator is :
-  -output-filter     filter the output plugins to enable, separator is :
-  -usage             print usage for a plugin, ie, 'telegraf -usage mysql'
-  -debug             print metrics as they're generated to stdout
-  -quiet             run in quiet mode
-  -version           print the version to stdout
-
-Examples:
-
-  # generate a telegraf config file:
-  telegraf -sample-config > telegraf.conf
-
-  # generate config with only cpu input & influxdb output plugins defined
-  telegraf -sample-config -input-filter cpu -output-filter influxdb
-
-  # run a single telegraf collection, outputing metrics to stdout
-  telegraf -config telegraf.conf -test
-
-  # run telegraf with all plugins defined in config file
-  telegraf -config telegraf.conf
-
-  # run telegraf, enabling the cpu & memory input, and influxdb output plugins
-  telegraf -config telegraf.conf -input-filter cpu:mem -output-filter influxdb
+```
+telegraf --help
 ```
 
-## Configuration
+#### Generate a telegraf config file:
 
-See the [configuration guide](docs/CONFIGURATION.md) for a rundown of the more advanced
-configuration options.
+```
+telegraf config > telegraf.conf
+```
 
-## Supported Input Plugins
+#### Generate config with only cpu input & influxdb output plugins defined:
 
-Telegraf currently has support for collecting metrics from many sources. For
-more information on each, please look at the directory of the same name in
-`plugins/inputs`.
+```
+telegraf --section-filter agent:inputs:outputs --input-filter cpu --output-filter influxdb config
+```
 
-Currently implemented sources:
+#### Run a single telegraf collection, outputting metrics to stdout:
 
-* aerospike
-* apache
-* bcache
-* couchdb
-* disque
-* docker
-* dovecot
-* elasticsearch
-* exec (generic executable plugin, support JSON, influx and graphite)
-* haproxy
-* httpjson (generic JSON-emitting http service plugin)
-* influxdb
-* jolokia
-* leofs
-* lustre2
-* mailchimp
-* memcached
-* mesos
-* mongodb
-* mysql
-* net_response
-* nginx
-* nsq
-* phpfpm
-* phusion passenger
-* ping
-* postgresql
-* powerdns
-* procstat
-* prometheus
-* puppetagent
-* rabbitmq
-* raindrops
-* redis
-* rethinkdb
-* sql server (microsoft)
-* twemproxy
-* zfs
-* zookeeper
-* sensors
-* snmp
-* win_perf_counters (windows performance counters)
-* system
-    * cpu
-    * mem
-    * net
-    * netstat
-    * disk
-    * diskio
-    * swap
+```
+telegraf --config telegraf.conf --test
+```
 
-Telegraf can also collect metrics via the following service plugins:
+#### Run telegraf with all plugins defined in config file:
 
-* statsd
-* mqtt_consumer
-* kafka_consumer
-* nats_consumer
-* github_webhooks
+```
+telegraf --config telegraf.conf
+```
 
-We'll be adding support for many more over the coming months. Read on if you
-want to add support for another service or third-party API.
+#### Run telegraf, enabling the cpu & memory input, and influxdb output plugins:
 
-## Supported Output Plugins
+```
+telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
+```
 
-* influxdb
-* amon
-* amqp
-* aws kinesis
-* aws cloudwatch
-* datadog
-* graphite
-* kafka
-* librato
-* mqtt
-* nsq
-* opentsdb
-* prometheus
-* riemann
+## Documentation
 
-## Contributing
+[Latest Release Documentation][release docs].
 
-Please see the
-[contributing guide](CONTRIBUTING.md)
-for details on contributing a plugin to Telegraf.
+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) (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)
+* [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)
+* [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)
+* [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)
+* [ipset](./plugins/inputs/ipset)
+* [iptables](./plugins/inputs/iptables)
+* [ipvs](./plugins/inputs/ipvs)
+* [jenkins](./plugins/inputs/jenkins)
+* [jolokia2](./plugins/inputs/jolokia2) (java, cassandra, kafka)
+* [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)
+* [postfix](./plugins/inputs/postfix)
+* [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)
+* [rabbitmq](./plugins/inputs/rabbitmq)
+* [raindrops](./plugins/inputs/raindrops)
+* [redis](./plugins/inputs/redis)
+* [rethinkdb](./plugins/inputs/rethinkdb)
+* [riak](./plugins/inputs/riak)
+* [salesforce](./plugins/inputs/salesforce)
+* [sensors](./plugins/inputs/sensors)
+* [sflow](./plugins/inputs/sflow)
+* [smart](./plugins/inputs/smart)
+* [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)
+* [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)
+  * [mandrill](./plugins/inputs/webhooks/mandrill)
+  * [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)
+
+## Parsers
+
+- [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
+
+* [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)
+* [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 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

@@ -1,21 +1,85 @@
 package telegraf
 
-import "time"
+import (
+	"time"
+)
 
+// Accumulator allows adding metrics to the processing flow.
 type Accumulator interface {
-	// 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.
-	Add(measurement string,
-		value interface{},
-		tags map[string]string,
-		t ...time.Time)
-
+	// AddFields adds a metric to the accumulator with the given measurement
+	// name, fields, and tags (and timestamp). If a timestamp is not provided,
+	// then the accumulator sets it to "now".
 	AddFields(measurement string,
 		fields map[string]interface{},
 		tags map[string]string,
 		t ...time.Time)
 
-	Debug() bool
-	SetDebug(enabled bool)
+	// AddGauge is the same as AddFields, but will add the metric as a "Gauge" type
+	AddGauge(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
+
+	// AddCounter is the same as AddFields, but will add the metric as a "Counter" type
+	AddCounter(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
+
+	// AddSummary is the same as AddFields, but will add the metric as a "Summary" type
+	AddSummary(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
+
+	// AddHistogram is the same as AddFields, but will add the metric as a "Histogram" type
+	AddHistogram(measurement string,
+		fields map[string]interface{},
+		tags map[string]string,
+		t ...time.Time)
+
+	// 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

@@ -1,49 +1,34 @@
 package agent
 
 import (
-	"fmt"
-	"log"
-	"math"
-	"sync"
 	"time"
 
 	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/internal/models"
+	"github.com/influxdata/telegraf/metric"
 )
 
-func NewAccumulator(
-	inputConfig *internal_models.InputConfig,
-	metrics chan telegraf.Metric,
-) *accumulator {
-	acc := accumulator{}
-	acc.metrics = metrics
-	acc.inputConfig = inputConfig
-	return &acc
+type MetricMaker interface {
+	LogName() string
+	MakeMetric(metric telegraf.Metric) telegraf.Metric
+	Log() telegraf.Logger
 }
 
 type accumulator struct {
-	sync.Mutex
-
-	metrics chan telegraf.Metric
-
-	defaultTags map[string]string
-
-	debug bool
-
-	inputConfig *internal_models.InputConfig
-
-	prefix string
+	maker     MetricMaker
+	metrics   chan<- telegraf.Metric
+	precision time.Duration
 }
 
-func (ac *accumulator) Add(
-	measurement string,
-	value interface{},
-	tags map[string]string,
-	t ...time.Time,
-) {
-	fields := make(map[string]interface{})
-	fields["value"] = value
-	ac.AddFields(measurement, fields, tags, t...)
+func NewAccumulator(
+	maker MetricMaker,
+	metrics chan<- telegraf.Metric,
+) telegraf.Accumulator {
+	acc := accumulator{
+		maker:     maker,
+		metrics:   metrics,
+		precision: time.Nanosecond,
+	}
+	return &acc
 }
 
 func (ac *accumulator) AddFields(
@@ -52,112 +37,127 @@ func (ac *accumulator) AddFields(
 	tags map[string]string,
 	t ...time.Time,
 ) {
-	if len(fields) == 0 || len(measurement) == 0 {
+	ac.addFields(measurement, tags, fields, telegraf.Untyped, t...)
+}
+
+func (ac *accumulator) AddGauge(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	ac.addFields(measurement, tags, fields, telegraf.Gauge, t...)
+}
+
+func (ac *accumulator) AddCounter(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	ac.addFields(measurement, tags, fields, telegraf.Counter, t...)
+}
+
+func (ac *accumulator) AddSummary(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	ac.addFields(measurement, tags, fields, telegraf.Summary, t...)
+}
+
+func (ac *accumulator) AddHistogram(
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+	t ...time.Time,
+) {
+	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
+	}
+}
 
-	if !ac.inputConfig.Filter.ShouldTagsPass(tags) {
+// AddError passes a runtime error to the accumulator.
+// The error will be tagged with the plugin name and written to the log.
+func (ac *accumulator) AddError(err error) {
+	if err == nil {
 		return
 	}
+	ac.maker.Log().Errorf("Error in plugin: %v", err)
+}
 
-	// Override measurement name if set
-	if len(ac.inputConfig.NameOverride) != 0 {
-		measurement = ac.inputConfig.NameOverride
-	}
-	// Apply measurement prefix and suffix if set
-	if len(ac.inputConfig.MeasurementPrefix) != 0 {
-		measurement = ac.inputConfig.MeasurementPrefix + measurement
-	}
-	if len(ac.inputConfig.MeasurementSuffix) != 0 {
-		measurement = measurement + ac.inputConfig.MeasurementSuffix
-	}
-
-	if tags == nil {
-		tags = make(map[string]string)
-	}
-	// Apply plugin-wide tags if set
-	for k, v := range ac.inputConfig.Tags {
-		if _, ok := tags[k]; !ok {
-			tags[k] = v
-		}
-	}
-	// Apply daemon-wide tags if set
-	for k, v := range ac.defaultTags {
-		if _, ok := tags[k]; !ok {
-			tags[k] = v
-		}
-	}
-
-	result := make(map[string]interface{})
-	for k, v := range fields {
-		// Filter out any filtered fields
-		if ac.inputConfig != nil {
-			if !ac.inputConfig.Filter.ShouldPass(k) {
-				continue
-			}
-		}
-		result[k] = v
-
-		// Validate uint64 and float64 fields
-		switch val := v.(type) {
-		case uint64:
-			// InfluxDB does not support writing uint64
-			if val < uint64(9223372036854775808) {
-				result[k] = int64(val)
-			} else {
-				result[k] = int64(9223372036854775807)
-			}
-		case float64:
-			// NaNs are invalid values in influxdb, skip measurement
-			if math.IsNaN(val) || math.IsInf(val, 0) {
-				if ac.debug {
-					log.Printf("Measurement [%s] field [%s] has a NaN or Inf "+
-						"field, skipping",
-						measurement, k)
-				}
-				continue
-			}
-		}
-	}
-	fields = nil
-	if len(result) == 0 {
-		return
-	}
+func (ac *accumulator) SetPrecision(precision time.Duration) {
+	ac.precision = precision
+}
 
+func (ac *accumulator) getTime(t []time.Time) time.Time {
 	var timestamp time.Time
 	if len(t) > 0 {
 		timestamp = t[0]
 	} else {
 		timestamp = time.Now()
 	}
+	return timestamp.Round(ac.precision)
+}
 
-	if ac.prefix != "" {
-		measurement = ac.prefix + measurement
+func (ac *accumulator) WithTracking(maxTracked int) telegraf.TrackingAccumulator {
+	return &trackingAccumulator{
+		Accumulator: ac,
+		delivered:   make(chan telegraf.DeliveryInfo, maxTracked),
 	}
+}
 
-	m, err := telegraf.NewMetric(measurement, tags, result, timestamp)
-	if err != nil {
-		log.Printf("Error adding point [%s]: %s\n", measurement, err.Error())
-		return
+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)
 	}
-	if ac.debug {
-		fmt.Println("> " + m.String())
+	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")
 	}
-	ac.metrics <- m
-}
-
-func (ac *accumulator) Debug() bool {
-	return ac.debug
-}
-
-func (ac *accumulator) SetDebug(debug bool) {
-	ac.debug = debug
-}
-
-func (ac *accumulator) setDefaultTags(tags map[string]string) {
-	ac.defaultTags = tags
-}
-
-func (ac *accumulator) addDefaultTag(key, value string) {
-	ac.defaultTags[key] = value
 }

agent/accumulator_test.go

@@ -0,0 +1,160 @@
+package agent
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/models"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAddFields(t *testing.T) {
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	tags := map[string]string{"foo": "bar"}
+	fields := map[string]interface{}{
+		"usage": float64(99),
+	}
+	now := time.Now()
+	a.AddCounter("acctest", fields, tags, now)
+
+	testm := <-metrics
+
+	require.Equal(t, "acctest", testm.Name())
+	actual, ok := testm.GetField("usage")
+
+	require.True(t, ok)
+	require.Equal(t, float64(99), actual)
+
+	actual, ok = testm.GetTag("foo")
+	require.True(t, ok)
+	require.Equal(t, "bar", actual)
+
+	tm := testm.Time()
+	// okay if monotonic clock differs
+	require.True(t, now.Equal(tm))
+
+	tp := testm.Type()
+	require.Equal(t, telegraf.Counter, tp)
+}
+
+func TestAccAddError(t *testing.T) {
+	errBuf := bytes.NewBuffer(nil)
+	log.SetOutput(errBuf)
+	defer log.SetOutput(os.Stderr)
+
+	metrics := make(chan telegraf.Metric, 10)
+	defer close(metrics)
+	a := NewAccumulator(&TestMetricMaker{}, metrics)
+
+	a.AddError(fmt.Errorf("foo"))
+	a.AddError(fmt.Errorf("bar"))
+	a.AddError(fmt.Errorf("baz"))
+
+	errs := bytes.Split(errBuf.Bytes(), []byte{'\n'})
+	require.Len(t, errs, 4) // 4 because of trailing newline
+	assert.Contains(t, string(errs[0]), "TestPlugin")
+	assert.Contains(t, string(errs[0]), "foo")
+	assert.Contains(t, string(errs[1]), "TestPlugin")
+	assert.Contains(t, string(errs[1]), "bar")
+	assert.Contains(t, string(errs[2]), "TestPlugin")
+	assert.Contains(t, string(errs[2]), "baz")
+}
+
+func TestSetPrecision(t *testing.T) {
+	tests := []struct {
+		name      string
+		unset     bool
+		precision time.Duration
+		timestamp time.Time
+		expected  time.Time
+	}{
+		{
+			name:      "default precision is nanosecond",
+			unset:     true,
+			timestamp: time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC),
+			expected:  time.Date(2006, time.February, 10, 12, 0, 0, 82912748, time.UTC),
+		},
+		{
+			name:      "second interval",
+			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",
+			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),
+		},
+		{
+			name:      "2 second precision",
+			precision: 2 * time.Second,
+			timestamp: time.Date(2006, time.February, 10, 12, 0, 2, 4, time.UTC),
+			expected:  time.Date(2006, time.February, 10, 12, 0, 2, 0, time.UTC),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			metrics := make(chan telegraf.Metric, 10)
+
+			a := NewAccumulator(&TestMetricMaker{}, metrics)
+			if !tt.unset {
+				a.SetPrecision(tt.precision)
+			}
+
+			a.AddFields("acctest",
+				map[string]interface{}{"value": float64(101)},
+				map[string]string{},
+				tt.timestamp,
+			)
+
+			testm := <-metrics
+			require.Equal(t, tt.expected, testm.Time())
+
+			close(metrics)
+		})
+	}
+}
+
+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) 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

@@ -1,50 +1,56 @@
 package agent
 
 import (
-	"github.com/stretchr/testify/assert"
 	"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) {
+	c := config.NewConfig()
+	c.Agent.OmitHostname = true
+	_, err := NewAgent(c)
+	assert.NoError(t, err)
+	assert.NotContains(t, c.Tags, "host")
+}
+
 func TestAgent_LoadPlugin(t *testing.T) {
 	c := config.NewConfig()
 	c.InputFilters = []string{"mysql"}
-	err := c.LoadConfig("../internal/config/testdata/telegraf-agent.toml")
+	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))
@@ -53,42 +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)
@@ -96,80 +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 TestAgent_ZeroJitter(t *testing.T) {
-	flushinterval := jitterInterval(time.Duration(10*time.Second),
-		time.Duration(0*time.Second))
-
-	actual := flushinterval.Nanoseconds()
-	exp := time.Duration(10 * time.Second).Nanoseconds()
-
-	if actual != exp {
-		t.Errorf("Actual %v, expected %v", actual, exp)
-	}
-}
-
-func TestAgent_ZeroInterval(t *testing.T) {
-	min := time.Duration(500 * time.Millisecond).Nanoseconds()
-	max := time.Duration(5 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(0*time.Second),
-			time.Duration(5*time.Second))
-		actual := flushinterval.Nanoseconds()
-
-		if actual > max {
-			t.Errorf("Didn't expect interval %d to be > %d", actual, max)
-			break
-		}
-		if actual < min {
-			t.Errorf("Didn't expect interval %d to be < %d", actual, min)
-			break
-		}
-	}
-}
-
-func TestAgent_ZeroBoth(t *testing.T) {
-	flushinterval := jitterInterval(time.Duration(0*time.Second),
-		time.Duration(0*time.Second))
-
-	actual := flushinterval
-	exp := time.Duration(500 * time.Millisecond)
-
-	if actual != exp {
-		t.Errorf("Actual %v, expected %v", actual, exp)
-	}
-}
-
-func TestAgent_JitterMax(t *testing.T) {
-	max := time.Duration(32 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(30*time.Second),
-			time.Duration(2*time.Second))
-		actual := flushinterval.Nanoseconds()
-		if actual > max {
-			t.Errorf("Didn't expect interval %d to be > %d", actual, max)
-			break
-		}
-	}
-}
-
-func TestAgent_JitterMin(t *testing.T) {
-	min := time.Duration(30 * time.Second).Nanoseconds()
-
-	for i := 0; i < 1000; i++ {
-		flushinterval := jitterInterval(time.Duration(30*time.Second),
-			time.Duration(2*time.Second))
-		actual := flushinterval.Nanoseconds()
-		if actual < min {
-			t.Errorf("Didn't expect interval %d to be < %d", actual, min)
-			break
+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

@@ -0,0 +1,18 @@
+package telegraf
+
+// Aggregator is an interface for implementing an Aggregator plugin.
+// the RunningAggregator wraps this interface and guarantees that
+// Add, Push, and Reset can not be called concurrently, so locking is not
+// required when implementing an Aggregator plugin.
+type Aggregator interface {
+	PluginDescriber
+
+	// Add the metric to the aggregator.
+	Add(in Metric)
+
+	// Push pushes the current aggregates to the accumulator.
+	Push(acc Accumulator)
+
+	// Reset resets the aggregators caches and aggregates.
+	Reset()
+}

appveyor.yml

@@ -0,0 +1,35 @@
+version: "{build}"
+
+image: Visual Studio 2019
+
+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:
+  - choco install make
+  - cd "%GOPATH%\src\github.com\influxdata\telegraf"
+  - git config --system core.longpaths true
+  - go version
+  - go env
+
+build_script:
+  - make deps
+  - make telegraf
+
+test_script:
+  - make check
+  - make test-windows
+
+artifacts:
+  - path: telegraf.exe

circle.yml

@@ -1,18 +0,0 @@
-machine:
-  services:
-    - docker
-  post:
-    - sudo service zookeeper stop
-    - go version
-    - go version | grep 1.5.2 || sudo rm -rf /usr/local/go
-    - wget https://storage.googleapis.com/golang/go1.5.2.linux-amd64.tar.gz
-    - sudo tar -C /usr/local -xzf go1.5.2.linux-amd64.tar.gz
-    - go version
-
-dependencies:
-  override:
-    - docker info
-
-test:
-  override:
-    - bash scripts/circle-test.sh

cmd/telegraf/telegraf.go

@@ -1,241 +1,367 @@
 package main
 
 import (
+	"context"
+	"errors"
 	"flag"
 	"fmt"
 	"log"
+	"net/http"
+	_ "net/http/pprof" // Comment this line to disable pprof endpoint.
 	"os"
 	"os/signal"
+	"sort"
 	"strings"
 	"syscall"
+	"time"
 
 	"github.com/influxdata/telegraf/agent"
-	"github.com/influxdata/telegraf/internal/config"
-
+	"github.com/influxdata/telegraf/config"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/internal/goplugin"
+	"github.com/influxdata/telegraf/logger"
+	_ "github.com/influxdata/telegraf/plugins/aggregators/all"
+	"github.com/influxdata/telegraf/plugins/inputs"
 	_ "github.com/influxdata/telegraf/plugins/inputs/all"
+	"github.com/influxdata/telegraf/plugins/outputs"
 	_ "github.com/influxdata/telegraf/plugins/outputs/all"
+	_ "github.com/influxdata/telegraf/plugins/processors/all"
 )
 
+// If you update these, update usage.go and usage_windows.go
 var fDebug = flag.Bool("debug", false,
-	"show metrics as they're generated to stdout")
+	"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,
+	"print available input plugins.")
 var fOutputFilters = flag.String("output-filter", "",
 	"filter the outputs to enable, separator is :")
+var fOutputList = flag.Bool("output-list", false,
+	"print available output plugins.")
+var fAggregatorFilters = flag.String("aggregator-filter", "",
+	"filter the aggregators to enable, separator is :")
+var fProcessorFilters = flag.String("processor-filter", "",
+	"filter the processors to enable, separator is :")
 var fUsage = flag.String("usage", "",
-	"print usage for a plugin, ie, 'telegraf -usage mysql'")
+	"print usage for a plugin, ie, 'telegraf --usage mysql'")
+var fService = flag.String("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 fInputFiltersLegacy = flag.String("filter", "",
-	"filter the inputs to enable, separator is :")
-var fOutputFiltersLegacy = flag.String("outputfilter", "",
-	"filter the outputs to enable, separator is :")
-var fConfigDirectoryLegacy = flag.String("configdirectory", "",
-	"directory containing additional *.conf files")
+var (
+	version string
+	commit  string
+	branch  string
+)
 
-// Telegraf version
-//	-ldflags "-X main.Version=`git describe --always --tags`"
-var Version string
+var stop chan struct{}
 
-const usage = `Telegraf, The plugin-driven server agent for collecting and reporting metrics.
-
-Usage:
-
-  telegraf <flags>
-
-The flags are:
-
-  -config <file>     configuration file to load
-  -test              gather metrics once, print them to stdout, and exit
-  -sample-config     print out full sample configuration to stdout
-  -config-directory  directory containing additional *.conf files
-  -input-filter      filter the input plugins to enable, separator is :
-  -output-filter     filter the output plugins to enable, separator is :
-  -usage             print usage for a plugin, ie, 'telegraf -usage mysql'
-  -debug             print metrics as they're generated to stdout
-  -quiet             run in quiet mode
-  -version           print the version to stdout
-
-Examples:
-
-  # generate a telegraf config file:
-  telegraf -sample-config > telegraf.conf
-
-  # generate config with only cpu input & influxdb output plugins defined
-  telegraf -sample-config -input-filter cpu -output-filter influxdb
-
-  # run a single telegraf collection, outputing metrics to stdout
-  telegraf -config telegraf.conf -test
-
-  # run telegraf with all plugins defined in config file
-  telegraf -config telegraf.conf
-
-  # run telegraf, enabling the cpu & memory input, and influxdb output plugins
-  telegraf -config telegraf.conf -input-filter cpu:mem -output-filter influxdb
-`
-
-func main() {
+func reloadLoop(
+	inputFilters []string,
+	outputFilters []string,
+	aggregatorFilters []string,
+	processorFilters []string,
+) {
 	reload := make(chan bool, 1)
 	reload <- true
 	for <-reload {
 		reload <- false
-		flag.Usage = func() { usageExit(0) }
-		flag.Parse()
 
-		if flag.NFlag() == 0 {
-			usageExit(0)
-		}
+		ctx, cancel := context.WithCancel(context.Background())
 
-		var inputFilters []string
-		if *fInputFiltersLegacy != "" {
-			inputFilter := strings.TrimSpace(*fInputFiltersLegacy)
-			inputFilters = strings.Split(":"+inputFilter+":", ":")
-		}
-		if *fInputFilters != "" {
-			inputFilter := strings.TrimSpace(*fInputFilters)
-			inputFilters = strings.Split(":"+inputFilter+":", ":")
-		}
-
-		var outputFilters []string
-		if *fOutputFiltersLegacy != "" {
-			outputFilter := strings.TrimSpace(*fOutputFiltersLegacy)
-			outputFilters = strings.Split(":"+outputFilter+":", ":")
-		}
-		if *fOutputFilters != "" {
-			outputFilter := strings.TrimSpace(*fOutputFilters)
-			outputFilters = strings.Split(":"+outputFilter+":", ":")
-		}
-
-		if *fVersion {
-			v := fmt.Sprintf("Telegraf - Version %s", Version)
-			fmt.Println(v)
-			return
-		}
-
-		if *fSampleConfig {
-			config.PrintSampleConfig(inputFilters, outputFilters)
-			return
-		}
-
-		if *fUsage != "" {
-			if err := config.PrintInputConfig(*fUsage); err != nil {
-				if err2 := config.PrintOutputConfig(*fUsage); err2 != nil {
-					log.Fatalf("%s and %s", err, err2)
-				}
-			}
-			return
-		}
-
-		var (
-			c   *config.Config
-			err error
-		)
-
-		if *fConfig != "" {
-			c = config.NewConfig()
-			c.OutputFilters = outputFilters
-			c.InputFilters = inputFilters
-			err = c.LoadConfig(*fConfig)
-			if err != nil {
-				log.Fatal(err)
-			}
-		} else {
-			fmt.Println("You must specify a config file. See telegraf --help")
-			os.Exit(1)
-		}
-
-		if *fConfigDirectoryLegacy != "" {
-			err = c.LoadDirectory(*fConfigDirectoryLegacy)
-			if err != nil {
-				log.Fatal(err)
-			}
-		}
-
-		if *fConfigDirectory != "" {
-			err = c.LoadDirectory(*fConfigDirectory)
-			if err != nil {
-				log.Fatal(err)
-			}
-		}
-		if len(c.Outputs) == 0 {
-			log.Fatalf("Error: no outputs found, did you provide a valid config file?")
-		}
-		if len(c.Inputs) == 0 {
-			log.Fatalf("Error: no inputs found, did you provide a valid config file?")
-		}
-
-		ag, err := agent.NewAgent(c)
-		if err != nil {
-			log.Fatal(err)
-		}
-
-		if *fDebug {
-			ag.Config.Agent.Debug = true
-		}
-
-		if *fQuiet {
-			ag.Config.Agent.Quiet = true
-		}
-
-		if *fTest {
-			err = ag.Test()
-			if err != nil {
-				log.Fatal(err)
-			}
-			return
-		}
-
-		err = ag.Connect()
-		if err != nil {
-			log.Fatal(err)
-		}
-
-		shutdown := make(chan struct{})
-		signals := make(chan os.Signal)
-		signal.Notify(signals, os.Interrupt, syscall.SIGHUP)
+		signals := make(chan os.Signal, 1)
+		signal.Notify(signals, os.Interrupt, syscall.SIGHUP,
+			syscall.SIGTERM, syscall.SIGINT)
 		go func() {
-			sig := <-signals
-			if sig == os.Interrupt {
-				close(shutdown)
-			}
-			if sig == syscall.SIGHUP {
-				log.Printf("Reloading Telegraf config\n")
-				<-reload
-				reload <- true
-				close(shutdown)
+			select {
+			case sig := <-signals:
+				if sig == syscall.SIGHUP {
+					log.Printf("I! Reloading Telegraf config")
+					<-reload
+					reload <- true
+				}
+				cancel()
+			case <-stop:
+				cancel()
 			}
 		}()
 
-		log.Printf("Starting Telegraf (version %s)\n", Version)
-		log.Printf("Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
-		log.Printf("Loaded inputs: %s", strings.Join(c.InputNames(), " "))
-		log.Printf("Tags enabled: %s", c.ListTags())
-
-		if *fPidfile != "" {
-			f, err := os.Create(*fPidfile)
-			if err != nil {
-				log.Fatalf("Unable to create pidfile: %s", err)
-			}
-
-			fmt.Fprintf(f, "%d\n", os.Getpid())
-
-			f.Close()
+		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(usage)
+	fmt.Println(internal.Usage)
 	os.Exit(rc)
 }
+
+func formatFullVersion() string {
+	var parts = []string{"Telegraf"}
+
+	if version != "" {
+		parts = append(parts, version)
+	} else {
+		parts = append(parts, "unknown")
+	}
+
+	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() {
+	flag.Usage = func() { usageExit(0) }
+	flag.Parse()
+	args := flag.Args()
+
+	sectionFilters, inputFilters, outputFilters := []string{}, []string{}, []string{}
+	if *fSectionFilters != "" {
+		sectionFilters = strings.Split(":"+strings.TrimSpace(*fSectionFilters)+":", ":")
+	}
+	if *fInputFilters != "" {
+		inputFilters = strings.Split(":"+strings.TrimSpace(*fInputFilters)+":", ":")
+	}
+	if *fOutputFilters != "" {
+		outputFilters = strings.Split(":"+strings.TrimSpace(*fOutputFilters)+":", ":")
+	}
+
+	aggregatorFilters, processorFilters := []string{}, []string{}
+	if *fAggregatorFilters != "" {
+		aggregatorFilters = strings.Split(":"+strings.TrimSpace(*fAggregatorFilters)+":", ":")
+	}
+	if *fProcessorFilters != "" {
+		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
+			parts := strings.Split(pprofHostPort, ":")
+			if len(parts) == 2 && parts[0] == "" {
+				pprofHostPort = fmt.Sprintf("localhost:%s", parts[1])
+			}
+			pprofHostPort = "http://" + pprofHostPort + "/debug/pprof"
+
+			log.Printf("I! Starting pprof HTTP server at: %s", pprofHostPort)
+
+			if err := http.ListenAndServe(*pprofAddr, nil); err != nil {
+				log.Fatal("E! " + err.Error())
+			}
+		}()
+	}
+
+	if len(args) > 0 {
+		switch args[0] {
+		case "version":
+			fmt.Println(formatFullVersion())
+			return
+		case "config":
+			config.PrintSampleConfig(
+				sectionFilters,
+				inputFilters,
+				outputFilters,
+				aggregatorFilters,
+				processorFilters,
+			)
+			return
+		}
+	}
+
+	// switch for flags which just do something and exit immediately
+	switch {
+	case *fOutputList:
+		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:")
+		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.Println(formatFullVersion())
+		return
+	case *fSampleConfig:
+		config.PrintSampleConfig(
+			sectionFilters,
+			inputFilters,
+			outputFilters,
+			aggregatorFilters,
+			processorFilters,
+		)
+		return
+	case *fUsage != "":
+		err := config.PrintInputConfig(*fUsage)
+		err2 := config.PrintOutputConfig(*fUsage)
+		if err != nil && err2 != nil {
+			log.Fatalf("E! %s and %s", err, err2)
+		}
+		return
+	}
+
+	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

@@ -0,0 +1,52 @@
+package aws
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/session"
+)
+
+type CredentialConfig struct {
+	Region      string
+	AccessKey   string
+	SecretKey   string
+	RoleARN     string
+	Profile     string
+	Filename    string
+	Token       string
+	EndpointURL string
+}
+
+func (c *CredentialConfig) Credentials() client.ConfigProvider {
+	if c.RoleARN != "" {
+		return c.assumeCredentials()
+	} else {
+		return c.rootCredentials()
+	}
+}
+
+func (c *CredentialConfig) rootCredentials() client.ConfigProvider {
+	config := &aws.Config{
+		Region:   aws.String(c.Region),
+		Endpoint: &c.EndpointURL,
+	}
+	if c.AccessKey != "" || c.SecretKey != "" {
+		config.Credentials = credentials.NewStaticCredentials(c.AccessKey, c.SecretKey, c.Token)
+	} else if c.Profile != "" || c.Filename != "" {
+		config.Credentials = credentials.NewSharedCredentials(c.Filename, c.Profile)
+	}
+
+	return session.New(config)
+}
+
+func (c *CredentialConfig) assumeCredentials() client.ConfigProvider {
+	rootCredentials := c.rootCredentials()
+	config := &aws.Config{
+		Region:   aws.String(c.Region),
+		Endpoint: &c.EndpointURL,
+	}
+	config.Credentials = stscreds.NewCredentials(rootCredentials, c.RoleARN)
+	return session.New(config)
+}

config/config_test.go

@@ -0,0 +1,259 @@
+package config
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	"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) {
+	c := NewConfig()
+	err := os.Setenv("MY_TEST_SERVER", "192.168.1.1")
+	assert.NoError(t, err)
+	err = os.Setenv("TEST_INTERVAL", "10s")
+	assert.NoError(t, err)
+	c.LoadConfig("./testdata/single_plugin_env_vars.toml")
+
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
+	memcached.Servers = []string{"192.168.1.1"}
+
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1", "ip_192.168.1.1_name"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
+			},
+		},
+		TagPass: []models.TagFilter{
+			{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
+		Interval: 10 * time.Second,
+	}
+	mConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, memcached, c.Inputs[0].Input,
+		"Testdata did not produce a correct memcached struct.")
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
+		"Testdata did not produce correct memcached metadata.")
+}
+
+func TestConfig_LoadSingleInput(t *testing.T) {
+	c := NewConfig()
+	c.LoadConfig("./testdata/single_plugin.toml")
+
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
+	memcached.Servers = []string{"localhost"}
+
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
+			},
+		},
+		TagPass: []models.TagFilter{
+			{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
+		Interval: 5 * time.Second,
+	}
+	mConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, memcached, c.Inputs[0].Input,
+		"Testdata did not produce a correct memcached struct.")
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
+		"Testdata did not produce correct memcached metadata.")
+}
+
+func TestConfig_LoadDirectory(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/single_plugin.toml")
+	if err != nil {
+		t.Error(err)
+	}
+	err = c.LoadDirectory("./testdata/subconfig")
+	if err != nil {
+		t.Error(err)
+	}
+
+	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
+	memcached.Servers = []string{"localhost"}
+
+	filter := models.Filter{
+		NameDrop:  []string{"metricname2"},
+		NamePass:  []string{"metricname1"},
+		FieldDrop: []string{"other", "stuff"},
+		FieldPass: []string{"some", "strings"},
+		TagDrop: []models.TagFilter{
+			{
+				Name:   "badtag",
+				Filter: []string{"othertag"},
+			},
+		},
+		TagPass: []models.TagFilter{
+			{
+				Name:   "goodtag",
+				Filter: []string{"mytag"},
+			},
+		},
+	}
+	assert.NoError(t, filter.Compile())
+	mConfig := &models.InputConfig{
+		Name:     "memcached",
+		Filter:   filter,
+		Interval: 5 * time.Second,
+	}
+	mConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, memcached, c.Inputs[0].Input,
+		"Testdata did not produce a correct memcached struct.")
+	assert.Equal(t, mConfig, c.Inputs[0].Config,
+		"Testdata did not produce correct memcached metadata.")
+
+	ex := inputs.Inputs["exec"]().(*exec.Exec)
+	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"
+	eConfig := &models.InputConfig{
+		Name:              "exec",
+		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,
+		"Merged Testdata did not produce correct exec metadata.")
+
+	memcached.Servers = []string{"192.168.1.1"}
+	assert.Equal(t, memcached, c.Inputs[2].Input,
+		"Testdata did not produce a correct memcached struct.")
+	assert.Equal(t, mConfig, c.Inputs[2].Config,
+		"Testdata did not produce correct memcached metadata.")
+
+	pstat := inputs.Inputs["procstat"]().(*procstat.Procstat)
+	pstat.PidFile = "/var/run/grafana-server.pid"
+
+	pConfig := &models.InputConfig{Name: "procstat"}
+	pConfig.Tags = make(map[string]string)
+
+	assert.Equal(t, pstat, c.Inputs[3].Input,
+		"Merged Testdata did not produce a correct procstat struct.")
+	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.toml

@@ -1,7 +1,9 @@
 [[inputs.memcached]]
   servers = ["localhost"]
-  pass = ["some", "strings"]
-  drop = ["other", "stuff"]
+  namepass = ["metricname1"]
+  namedrop = ["metricname2"]
+  fieldpass = ["some", "strings"]
+  fielddrop = ["other", "stuff"]
   interval = "5s"
   [inputs.memcached.tagpass]
     goodtag = ["mytag"]

config/testdata/single_plugin_env_vars.toml

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

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/subconfig/memcached.conf

@@ -1,5 +1,7 @@
 [[inputs.memcached]]
   servers = ["192.168.1.1"]
+  namepass = ["metricname1"]
+  namedrop = ["metricname2"]
   pass = ["some", "strings"]
   drop = ["other", "stuff"]
   interval = "5s"

config/testdata/telegraf-agent.toml

@@ -60,7 +60,7 @@
   # Kafka topic for producer messages
   topic = "telegraf"
   # Telegraf tag to use as a routing key
-  #  ie, if this tag exists, it's value will be used as the routing key
+  #  ie, if this tag exists, its value will be used as the routing key
   routing_tag = "host"
 
 
@@ -143,19 +143,31 @@
 [[inputs.diskio]]
   # no configuration
 
-# read metrics from a Kafka topic
+# read metrics from a Kafka 0.9+ topic
 [[inputs.kafka_consumer]]
-  # topic(s) to consume
+  ## kafka brokers
+  brokers = ["localhost:9092"]
+  ## topic(s) to consume
+  topics = ["telegraf"]
+  ## the name of the consumer group
+  consumer_group = "telegraf_metrics_consumers"
+  ## Offset (must be either "oldest" or "newest")
+  offset = "oldest"
+
+# read metrics from a Kafka legacy topic
+[[inputs.kafka_consumer_legacy]]
+  ## topic(s) to consume
   topics = ["telegraf"]
   # an array of Zookeeper connection strings
   zookeeper_peers = ["localhost:2181"]
-  # the name of the consumer group
+  ## the name of the consumer group
   consumer_group = "telegraf_metrics_consumers"
   # Maximum number of points to buffer between collection intervals
   point_buffer = 100000
-  # Offset (must be either "oldest" or "newest")
+  ## Offset (must be either "oldest" or "newest")
   offset = "oldest"
 
+
 # Read metrics from a LeoFS Server via SNMP
 [[inputs.leofs]]
   # An array of URI to gather stats about LeoFS.
@@ -244,7 +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

@@ -0,0 +1,102 @@
+version: '3'
+
+services:
+  aerospike:
+    image: aerospike/aerospike-server:3.9.0
+    ports:
+      - "3000:3000"
+  zookeeper:
+    image: wurstmeister/zookeeper
+    environment:
+      - JAVA_OPTS="-Xms256m -Xmx256m"
+    ports:
+      - "2181:2181"
+  kafka:
+    image: wurstmeister/kafka
+    environment:
+      - KAFKA_ADVERTISED_HOST_NAME=localhost
+      - KAFKA_ADVERTISED_PORT=9092
+      - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
+      - KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
+      - JAVA_OPTS="-Xms256m -Xmx256m"
+    ports:
+      - "9092:9092"
+    depends_on:
+      - zookeeper
+  elasticsearch:
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.2.0
+    environment:
+    - "ES_JAVA_OPTS=-Xms256m -Xmx256m"
+    - discovery.type=single-node
+    - xpack.security.enabled=false
+    ports:
+      - "9200:9200"
+  mysql:
+    image: mysql
+    environment:
+      - MYSQL_ALLOW_EMPTY_PASSWORD=yes
+    ports:
+      - "3306:3306"
+  memcached:
+    image: memcached
+    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:
+    image: rabbitmq:3-management
+    ports:
+      - "15672:15672"
+      - "5672:5672"
+  redis:
+    image: redis:alpine
+    ports:
+      - "6379:6379"
+  nsq:
+    image: nsqio/nsq
+    ports:
+      - "4150:4150"
+    command: "/nsqd"
+  mqtt:
+    image: ncarlier/mqtt
+    ports:
+      - "1883:1883"
+  riemann:
+    image: stealthly/docker-riemann
+    ports:
+      - "5555:5555"
+  nats:
+    image: nats
+    ports:
+      - "4222:4222"
+  openldap:
+    image: cobaugh/openldap-alpine
+    environment:
+      - SLAPD_CONFIG_ROOTDN="cn=manager,cn=config"
+      - SLAPD_CONFIG_ROOTPW="secret"
+    ports:
+      - "389:389"
+      - "636:636"
+  crate:
+    image: crate/crate
+    ports:
+      - "4200:4200"
+      - "4230:4230"
+      - "6543:5432"
+    command:
+      - crate
+      - -Cnetwork.host=0.0.0.0
+      - -Ctransport.host=localhost
+    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

@@ -0,0 +1,67 @@
+# Telegraf Aggregator & Processor Plugins
+
+As of release 1.1.0, Telegraf has the concept of Aggregator and Processor Plugins.
+
+These plugins sit in-between Input & Output plugins, aggregating and processing
+metrics as they pass through Telegraf:
+
+```
+┌───────────┐
+│           │
+│    CPU    │───┐
+│           │   │
+└───────────┘   │
+                │
+┌───────────┐   │                                              ┌───────────┐
+│           │   │                                              │           │
+│  Memory   │───┤                                          ┌──▶│ InfluxDB  │
+│           │   │                                          │   │           │
+└───────────┘   │    ┌─────────────┐     ┌─────────────┐   │   └───────────┘
+                │    │             │     │Aggregate    │   │
+┌───────────┐   │    │Process      │     │ - mean      │   │   ┌───────────┐
+│           │   │    │ - transform │     │ - quantiles │   │   │           │
+│   MySQL   │───┼───▶│ - decorate  │────▶│ - min/max   │───┼──▶│   File    │
+│           │   │    │ - filter    │     │ - count     │   │   │           │
+└───────────┘   │    │             │     │             │   │   └───────────┘
+                │    └─────────────┘     └─────────────┘   │
+┌───────────┐   │                                          │   ┌───────────┐
+│           │   │                                          │   │           │
+│   SNMP    │───┤                                          └──▶│   Kafka   │
+│           │   │                                              │           │
+└───────────┘   │                                              └───────────┘
+                │
+┌───────────┐   │
+│           │   │
+│  Docker   │───┘
+│           │
+└───────────┘
+```
+
+Both Aggregators and Processors analyze metrics as they pass through Telegraf.
+
+Use [measurement filtering](CONFIGURATION.md#measurement-filtering)
+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
+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
+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, or standard deviation. For this reason, all _aggregator_
+plugins are configured with a `period`. The `period` is the size of the window
+of metrics that each _aggregate_ represents. In other words, the emitted
+_aggregate_ metric will be the aggregated value of the past `period` seconds.
+Since many users will only care about their aggregates and not every single metric
+gathered, there is also a `drop_original` argument, which tells Telegraf to only
+emit the aggregates and not the original metrics.
+
+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

@@ -1,108 +1,467 @@
-# Telegraf Configuration
+# Configuration
 
-## Generating a Configuration File
+Telegraf's configuration file is written using [TOML][] and is composed of
+three sections: [global tags][], [agent][] settings, and [plugins][].
 
-A default Telegraf config file can be generated using the -sample-config flag:
-`telegraf -sample-config > telegraf.conf`
+View the default [telegraf.conf][] config file with all available plugins.
+
+### 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:
-`telegraf -sample-config -input-filter cpu:mem:net:swap -output-filter influxdb:kafka`
+--input-filter and --output-filter flags:
 
-## `[global_tags]` Configuration
+```sh
+telegraf --input-filter cpu:mem:net:swap --output-filter influxdb:kafka config
+```
 
-Global tags can be specific 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.
+### Configuration Loading
 
-## `[agent]` Configuration
+The location of the configuration file can be set via the `--config` command
+line flag.
 
-Telegraf has a few options you can configure under the `agent` section of the
-config.
+When the `--config-directory` command line flag is used files ending with
+`.conf` in the specified directory will also be included in the Telegraf
+configuration.
 
-* **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_buffer_limit**: Telegraf will cache metric_buffer_limit metrics
-for each output, and will flush this buffer on a successful write.
-* **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.
-* **debug**: Run telegraf in debug mode.
-* **quiet**: Run telegraf in quiet mode.
-* **hostname**: Override default hostname, if empty use os.Hostname().
+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.
 
-## `[inputs.xxx]` Configuration
+### Environment Variables
 
-There are some configuration options that are configurable per input:
+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}`.
 
-* **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.
-* **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.
+When using the `.deb` or `.rpm` packages, you can define environment variables
+in the `/etc/default/telegraf` file.
 
-#### Input Filters
+**Example**:
 
-There are also filters that can be configured per input:
+`/etc/default/telegraf`:
+```
+USER="alice"
+INFLUX_URL="http://localhost:8086"
+INFLUX_SKIP_DATABASE_CREATION="true"
+INFLUX_PASSWORD="monkey123"
+```
 
-* **pass**: An array of strings that is used to filter metrics generated by the
-current input. Each string in the array is tested as a glob match against field names
-and if it matches, the field is emitted.
-* **drop**: The inverse of pass, if a field name matches, it is not emitted.
-* **tagpass**: tag names and arrays of strings that are used to filter
-measurements by the current input. Each string in the array is tested as a glob
-match against the tag name, and if it matches the measurement is emitted.
-* **tagdrop**: The inverse of tagpass. If a tag matches, the measurement is not
-emitted. This is tested on measurements that have passed the tagpass test.
+`/etc/telegraf.conf`:
+```toml
+[global_tags]
+  user = "${USER}"
 
-#### Input Configuration Examples
+[[inputs.mem]]
 
-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_`.
+[[outputs.influxdb]]
+  urls = ["${INFLUX_URL}"]
+  skip_database_creation = ${INFLUX_SKIP_DATABASE_CREATION}
+  password = "${INFLUX_PASSWORD}"
+```
+
+The above files will produce the following effective configuration file to be
+parsed:
+```toml
+[global_tags]
+  user = "alice"
+
+[[outputs.influxdb]]
+  urls = "http://localhost:8086"
+  skip_database_creation = true
+  password = "monkey123"
+```
+
+### Intervals
+
+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"
+```
+
+### Global Tags
+
+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.
-  precision = "s"
+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_'
-  drop = ["time_*"]
+  name_override = "percpu_usage"
+  fielddrop = ["cpu_time*"]
 ```
 
-#### Input Config: tagpass and tagdrop
+### Output Plugins
 
+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
   totalcpu = false
-  drop = ["cpu_time"]
+  fielddrop = ["cpu_time"]
   # Don't collect CPU data for cpu6 & cpu7
   [inputs.cpu.tagdrop]
     cpu = [ "cpu6", "cpu7" ]
@@ -115,104 +474,119 @@ fields which begin with `time_`.
     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: pass and drop
-
+##### Using fieldpass and fielddrop:
 ```toml
 # Drop all metrics for guest & steal CPU usage
 [[inputs.cpu]]
   percpu = false
   totalcpu = true
-  drop = ["usage_guest", "usage_steal"]
+  fielddrop = ["usage_guest", "usage_steal"]
 
 # Only store inode related metrics for disks
 [[inputs.disk]]
-  pass = ["inodes*"]
+  fieldpass = ["inodes*"]
 ```
 
-#### Input config: prefix, suffix, and override
-
-This plugin will emit measurements with the name `cpu_total`
-
+##### Using namepass and namedrop:
 ```toml
-[[inputs.cpu]]
-  name_suffix = "_total"
-  percpu = false
-  totalcpu = true
+# Drop all metrics about containers for kubelet
+[[inputs.prometheus]]
+  urls = ["http://kube-node-1:4194/metrics"]
+  namedrop = ["container_*"]
+
+# Only store rest client related metrics for kubelet
+[[inputs.prometheus]]
+  urls = ["http://kube-node-1:4194/metrics"]
+  namepass = ["rest_client_*"]
 ```
 
-This will emit measurements with the name `foobar`
-
+##### Using taginclude and tagexclude:
 ```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`
-
-```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
-
+# Only include the "cpu" tag in the measurements for the cpu plugin.
 [[inputs.cpu]]
   percpu = true
-  totalcpu = false
-  name_override = "percpu_usage"
-  drop = ["cpu_time*"]
+  totalcpu = true
+  taginclude = ["cpu"]
+
+# Exclude the "fstype" tag from the measurements for the disk plugin.
+[[inputs.disk]]
+  tagexclude = ["fstype"]
 ```
 
-## `[outputs.xxx]` Configuration
-
-Telegraf also supports specifying multiple output sinks to send data to,
-configuring each output sink is different, but examples can be
-found by running `telegraf -sample-config`.
-
-Outputs also support the same configurable options as inputs
-(pass, drop, tagpass, tagdrop)
-
+##### Metrics can be routed to different outputs using the metric name and tags:
 ```toml
 [[outputs.influxdb]]
   urls = [ "http://localhost:8086" ]
   database = "telegraf"
-  precision = "s"
   # Drop all measurements that start with "aerospike"
-  drop = ["aerospike*"]
+  namedrop = ["aerospike*"]
 
 [[outputs.influxdb]]
   urls = [ "http://localhost:8086" ]
   database = "telegraf-aerospike-data"
-  precision = "s"
   # Only accept aerospike data:
-  pass = ["aerospike*"]
+  namepass = ["aerospike*"]
 
 [[outputs.influxdb]]
   urls = [ "http://localhost:8086" ]
   database = "telegraf-cpu0-data"
-  precision = "s"
   # Only store measurements where the tag "cpu" matches the value "cpu0"
   [outputs.influxdb.tagpass]
     cpu = ["cpu0"]
 ```
+
+##### Routing metrics to different outputs based on the input.
+
+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
+[[outputs.influxdb]]
+  urls = ["http://influxdb.example.com"]
+  database = "db_default"
+  [outputs.influxdb.tagdrop]
+    influxdb_database = ["*"]
+
+[[outputs.influxdb]]
+  urls = ["http://influxdb.example.com"]
+  database = "db_other"
+  tagexclude = ["influxdb_database"]
+  [outputs.influxdb.tagpass]
+    influxdb_database = ["other"]
+
+[[inputs.disk]]
+  [inputs.disk.tags]
+    influxdb_database = "other"
+```
+
+### Transport Layer Security (TLS)
+
+Reference the detailed [TLS][] documentation.
+
+[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

@@ -1,27 +1,24 @@
-# Telegraf Input Data Formats
+# Input Data Formats
 
-Telegraf metrics, like InfluxDB
-[points](https://docs.influxdata.com/influxdb/v0.10/write_protocols/line/),
-are a combination of four basic parts:
+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. Measurement Name
-1. Tags
-1. Fields
-1. Timestamp
+- [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)
 
-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]]
@@ -31,244 +28,11 @@ example, in the exec plugin:
   ## measurement name suffix (for separating different commands)
   name_suffix = "_mycollector"
 
-  ## Data format to consume. This can be "json", "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
+  ## 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"
-
-  ## 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. This can be "json", "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
-  data_format = "influx"
-```
-
-## JSON:
-
-The JSON data format flattens JSON into metric _fields_. For example, this JSON:
-
-```json
-{
-    "a": 5,
-    "b": {
-        "c": 6
-    }
-}
-```
-
-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. This can be "json", "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
-  data_format = "json"
-
-  ## List of tag names to extract from top-level of JSON server response
-  tag_keys = [
-    "my_tag_1",
-    "my_tag_2"
-  ]
-```
-
-with this JSON output from a command:
-
-```json
-{
-    "a": 5,
-    "b": {
-        "c": 6
-    },
-    "my_tag_1": "foo"
-}
-```
-
-Your Telegraf metrics would get tagged with "my_tag_1"
-
-```
-exec_mycollector,my_tag_1=foo a=5,b_c=6
-```
-
-## Graphite:
-
-The Graphite data format translates graphite _dot_ buckets directly into
-telegraf measurement names, with a single value field, and without any tags. For
-more advanced options, Telegraf supports specifying "templates" to translate
-graphite buckets into Telegraf metrics.
-
-#### Separator:
-
-You can specify a separator to use for the parsed metrics.
-By default, it will leave the metrics with a "." separator.
-Setting `separator = "_"` will translate:
-
-```
-cpu.usage.idle 99
-=> cpu_usage_idle value=99
-```
-
-#### Measurement/Tag Templates:
-
-The most basic template is to specify a single transformation to apply to all
-incoming metrics. _measurement_ is a special keyword that tells Telegraf which
-parts of the graphite bucket to combine into the measurement name. It can have a
-trailing `*` to indicate that the remainder of the metric should be used.
-Other words are considered tag keys. So the following template:
-
-```toml
-templates = [
-    "region.measurement*"
-]
-```
-
-would result in the following Graphite -> Telegraf transformation.
-
-```
-us-west.cpu.load 100
-=> cpu.load,region=us-west value=100
-```
-
-#### Field Templates:
-
-There is also a _field_ keyword, which can only be specified once.
-The field keyword tells Telegraf to give the metric that field name.
-So the following template:
-
-```toml
-templates = [
-    "measurement.measurement.field.region"
-]
-```
-
-would result in the following Graphite -> Telegraf transformation.
-
-```
-cpu.usage.idle.us-west 100
-=> cpu_usage,region=us-west idle=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.us-west 100
-=> cpu_load,region=us-west 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.us-west 100
-=> cpu_usage,region=us-west,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. This can be "json", "influx" or "graphite" (line-protocol)
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
-  data_format = "graphite"
-
-  ## This string will be used to join the matched values.
-  separator = "_"
-
-  ## Each template line requires a template pattern. It can have an optional
-  ## filter before the template and separated by spaces. It can also have optional extra
-  ## tags following the template. Multiple tags should be separated by commas and no spaces
-  ## similar to the line protocol format. There can be only one default template.
-  ## Templates support below format:
-  ## 1. filter + template
-  ## 2. filter + template + extra tag
-  ## 3. filter + template with field key
-  ## 4. default template
-  templates = [
-    "*.app env.service.resource.measurement",
-    "stats.* .host.measurement* region=us-west,agent=sensu",
-    "stats2.* .host.measurement.field",
-    "measurement*"
-  ]
-```
+[metrics]: /docs/METRICS.md

docs/DATA_FORMATS_OUTPUT.md

@@ -1,97 +1,28 @@
-# Telegraf Output Data Formats
+# Output Data Formats
 
-Telegraf metrics, like InfluxDB
-[points](https://docs.influxdata.com/influxdb/v0.10/write_protocols/line/),
-are a combination of four basic parts:
+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. Measurement Name
-1. Tags
-1. Fields
-1. Timestamp
+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)
 
-In InfluxDB line protocol, these 4 parts are easily defined in textual form:
-
-```
-measurement_name[,tag1=val1,...]  field1=val1[,field2=val2,...]  [timestamp]
-```
-
-For Telegraf outputs that write textual data (such as `kafka`, `mqtt`, and `file`),
-InfluxDB line protocol was originally the only available output format. But now
-we are normalizing telegraf metric "serializers" into a
-[plugin-like interface](https://github.com/influxdata/telegraf/tree/master/plugins/serializers)
-across all output plugins that can support it.
-You will be able to identify a plugin that supports different data formats
-by the presence of a `data_format`
-config option, for example, in the `file` output plugin:
+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.
   files = ["stdout"]
 
-  ## Data format to output. This can be "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
-  data_format = "influx"
-
-  ## Additional configuration options go here
-```
-
-Each data_format has an additional set of configuration options available, which
-I'll go over below.
-
-## Influx:
-
-There are no additional configuration options for InfluxDB line-protocol. The
-metrics are serialized directly into InfluxDB line-protocol.
-
-#### Influx Configuration:
-
-```toml
-[[outputs.file]]
-  ## Files to write to, "stdout" is a specially handled file.
-  files = ["stdout", "/tmp/metrics.out"]
-
-  ## Data format to output. This can be "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
+  ## 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"
 ```
-
-## Graphite:
-
-The Graphite data format translates Telegraf metrics into _dot_ buckets.
-The format is:
-
-```
-[prefix].[host tag].[all tags (alphabetical)].[measurement name].[field name] value timestamp
-```
-
-Which means the following influx metric -> graphite conversion would happen:
-
-```
-cpu,cpu=cpu-total,dc=us-east-1,host=tars usage_idle=98.09,usage_user=0.89 1455320660004257758
-=>
-tars.cpu-total.us-east-1.cpu.usage_user 0.89 1455320690
-tars.cpu-total.us-east-1.cpu.usage_idle 98.09 1455320690
-```
-
-`prefix` is a configuration option when using the graphite output data format.
-
-#### Graphite Configuration:
-
-```toml
-[[outputs.file]]
-  ## Files to write to, "stdout" is a specially handled file.
-  files = ["stdout", "/tmp/metrics.out"]
-
-  ## Data format to output. This can be "influx" or "graphite"
-  ## Each data format has it's own unique set of configuration options, read
-  ## more about them here:
-  ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
-  data_format = "influx"
-
-  prefix = "telegraf"
-```

docs/FAQ.md

@@ -0,0 +1,76 @@
+# Frequently Asked Questions
+
+### Q: How can I monitor the Docker Engine Host from within a container?
+
+You will need to setup several volume mounts as well as some environment
+variables:
+```
+docker run --name telegraf
+	-v /:/hostfs:ro
+	-v /etc:/hostfs/etc:ro
+	-v /proc:/hostfs/proc:ro
+	-v /sys:/hostfs/sys: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
+```
+
+
+### Q: Why do I get a "no such host" error resolving hostnames that other
+programs can resolve?
+
+Go uses a pure Go resolver by default for [name resolution](https://golang.org/pkg/net/#hdr-Name_Resolution).
+This resolver behaves differently than the C library functions but is more
+efficient when used with the Go runtime.
+
+If you encounter problems or want to use more advanced name resolution methods
+that are unsupported by the pure Go resolver, you can switch to the cgo
+resolver.
+
+If running manually set:
+```
+export GODEBUG=netdns=cgo
+```
+
+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
+[milestones](https://github.com/influxdata/telegraf/milestones) page.

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

@@ -1,33 +1,172 @@
-# List
-- github.com/Shopify/sarama [MIT LICENSE](https://github.com/Shopify/sarama/blob/master/MIT-LICENSE)
-- github.com/Sirupsen/logrus [MIT LICENSE](https://github.com/Sirupsen/logrus/blob/master/LICENSE)
-- github.com/armon/go-metrics [MIT LICENSE](https://github.com/armon/go-metrics/blob/master/LICENSE)
-- github.com/boltdb/bolt [MIT LICENSE](https://github.com/boltdb/bolt/blob/master/LICENSE)
-- github.com/cenkalti/backoff [MIT LICENSE](https://github.com/cenkalti/backoff/blob/master/LICENSE)
-- github.com/dancannon/gorethink [APACHE LICENSE](https://github.com/dancannon/gorethink/blob/master/LICENSE)
-- github.com/eapache/go-resiliency [MIT LICENSE](https://github.com/eapache/go-resiliency/blob/master/LICENSE)
-- github.com/eapache/queue [MIT LICENSE](https://github.com/eapache/queue/blob/master/LICENSE)
-- github.com/fsouza/go-dockerclient [BSD LICENSE](https://github.com/fsouza/go-dockerclient/blob/master/LICENSE)
-- github.com/go-sql-driver/mysql [MPL LICENSE](https://github.com/go-sql-driver/mysql/blob/master/LICENSE)
-- github.com/gogo/protobuf [BSD LICENSE](https://github.com/gogo/protobuf/blob/master/LICENSE)
-- github.com/golang/protobuf [BSD LICENSE](https://github.com/golang/protobuf/blob/master/LICENSE)
-- github.com/golang/snappy [BSD LICENSE](https://github.com/golang/snappy/blob/master/LICENSE)
-- github.com/gonuts/go-shellquote (No License, but the project it was forked from https://github.com/kballard/go-shellquote is [MIT](https://github.com/kballard/go-shellquote/blob/master/LICENSE)).
-- github.com/hashicorp/go-msgpack [BSD LICENSE](https://github.com/hashicorp/go-msgpack/blob/master/LICENSE)
-- github.com/hashicorp/raft [MPL LICENSE](https://github.com/hashicorp/raft/blob/master/LICENSE)
-- github.com/hashicorp/raft-boltdb [MPL LICENSE](https://github.com/hashicorp/raft-boltdb/blob/master/LICENSE)
-- github.com/lib/pq [MIT LICENSE](https://github.com/lib/pq/blob/master/LICENSE.md)
-- github.com/matttproud/golang_protobuf_extensions [APACHE LICENSE](https://github.com/matttproud/golang_protobuf_extensions/blob/master/LICENSE)
-- github.com/naoina/go-stringutil [MIT LICENSE](https://github.com/naoina/go-stringutil/blob/master/LICENSE)
-- github.com/naoina/toml [MIT LICENSE](https://github.com/naoina/toml/blob/master/LICENSE)
-- github.com/prometheus/client_golang [APACHE LICENSE](https://github.com/prometheus/client_golang/blob/master/LICENSE)
-- github.com/samuel/go-zookeeper [BSD LICENSE](https://github.com/samuel/go-zookeeper/blob/master/LICENSE)
-- github.com/stretchr/objx [MIT LICENSE](github.com/stretchr/objx)
-- github.com/stretchr/testify [MIT LICENSE](https://github.com/stretchr/testify/blob/master/LICENCE.txt)
-- 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)
-- gopkg.in/dancannon/gorethink.v1 [APACHE LICENSE](https://github.com/dancannon/gorethink/blob/v1.1.2/LICENSE)
-- gopkg.in/mgo.v2 [BSD LICENSE](https://github.com/go-mgo/mgo/blob/v2/LICENSE)
-- golang.org/x/crypto/* [BSD LICENSE](https://github.com/golang/crypto/blob/master/LICENSE)
-- internal Glob function [MIT LICENSE](https://github.com/ryanuber/go-glob/blob/master/LICENSE)
+# Licenses of dependencies
 
+When distributed in a binary form, Telegraf may contain portions of the
+following works:
+
+- 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/PROFILING.md

@@ -0,0 +1,24 @@
+# Telegraf profiling
+
+Telegraf uses the standard package `net/http/pprof`. This package serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.
+
+By default, the profiling is turned off.
+
+To enable profiling you need to specify address to config parameter `pprof-addr`, for example:
+
+```
+telegraf --config telegraf.conf --pprof-addr localhost:6060
+```
+
+There are several paths to get different profiling information:
+
+To look at the heap profile:
+
+`go tool pprof http://localhost:6060/debug/pprof/heap`
+
+or to look at a 30-second CPU profile:
+
+`go tool pprof http://localhost:6060/debug/pprof/profile?seconds=30`
+
+To view all available profiles, open `http://localhost:6060/debug/pprof/` in your browser.
+

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

@@ -0,0 +1,71 @@
+# Running Telegraf as a Windows Service
+
+Telegraf natively supports running as a Windows Service. Outlined below is are
+the general steps to set it up.
+
+1. Obtain the telegraf windows distribution
+2. Create the directory `C:\Program Files\Telegraf` (if you install in a different
+   location simply specify the `--config` parameter with the desired location)
+3. Place the telegraf.exe and the telegraf.conf config file into `C:\Program Files\Telegraf`
+4. To install the service into the Windows Service Manager, run the following in PowerShell as an administrator (If necessary, you can wrap any spaces in the file paths in double quotes ""):
+
+   ```
+   > C:\"Program Files"\Telegraf\telegraf.exe --service install
+   ```
+
+5. Edit the configuration file to meet your needs
+6. To check that it works, run:
+
+   ```
+   > C:\"Program Files"\Telegraf\telegraf.exe --config C:\"Program Files"\Telegraf\telegraf.conf --test
+   ```
+
+7. To start collecting data, run:
+
+   ```
+   > net start telegraf
+   ```
+
+## Config Directory
+
+You can also specify a `--config-directory` for the service to use:
+1. Create a directory for config snippets: `C:\Program Files\Telegraf\telegraf.d`
+2. Include the `--config-directory` option when registering the service:
+   ```
+   > C:\"Program Files"\Telegraf\telegraf.exe --service install --config C:\"Program Files"\Telegraf\telegraf.conf --config-directory C:\"Program Files"\Telegraf\telegraf.d
+   ```
+
+## Other supported operations
+
+Telegraf can manage its own service through the --service flag:
+
+| Command                            | Effect                        |
+|------------------------------------|-------------------------------|
+| `telegraf.exe --service install`   | Install telegraf as a service |
+| `telegraf.exe --service uninstall` | Remove the telegraf service   |
+| `telegraf.exe --service start`     | Start the telegraf service    |
+| `telegraf.exe --service stop`      | Stop the telegraf service     |
+
+## 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"

etc/telegraf_windows.conf

@@ -0,0 +1,419 @@
+# 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]
+  ## Default data collection interval for all inputs
+  interval = "10s"
+  ## Rounds collection interval to 'interval'
+  ## ie, if interval="10s" then always collect on :00, :10, :20, etc.
+  round_interval = true
+
+  ## Telegraf will 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.
+  ## This can be used to avoid many plugins querying things like sysfs at the
+  ## same time, which can have a measurable effect on the system.
+  collection_jitter = "0s"
+
+  ## Default flushing interval for all outputs. 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"
+
+  ## 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
+
+
+###############################################################################
+#                            OUTPUT PLUGINS                                   #
+###############################################################################
+
+
+# Configuration for sending metrics to InfluxDB
+[[outputs.influxdb]]
+  ## 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"]
+
+  ## 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"
+
+  ## HTTP User-Agent
+  # user_agent = "telegraf"
+
+  ## 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
+
+
+###############################################################################
+#                            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,
+# which utilize more system resources.
+#
+# See more configuration examples at:
+#   https://github.com/influxdata/telegraf/tree/master/plugins/inputs/win_perf_counters
+
+[[inputs.win_perf_counters]]
+  [[inputs.win_perf_counters.object]]
+    # Processor usage, alternative to native, reports on a per core.
+    ObjectName = "Processor"
+    Instances = ["*"]
+    Counters = [
+      "% Idle Time",
+      "% Interrupt Time",
+      "% Privileged Time",
+      "% User Time",
+      "% Processor Time",
+      "% DPC Time",
+    ]
+    Measurement = "win_cpu"
+    # Set to true to include _Total instance when querying for all (*).
+    IncludeTotal=true
+
+  [[inputs.win_perf_counters.object]]
+    # Disk times and queues
+    ObjectName = "LogicalDisk"
+    Instances = ["*"]
+    Counters = [
+      "% Idle Time",
+      "% Disk Time",
+      "% Disk Read Time",
+      "% Disk Write Time",
+      "% Free Space",
+      "Current Disk Queue Length",
+      "Free Megabytes",
+    ]
+    Measurement = "win_disk"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "PhysicalDisk"
+    Instances = ["*"]
+    Counters = [
+      "Disk Read Bytes/sec",
+      "Disk Write Bytes/sec",
+      "Current Disk Queue Length",
+      "Disk Reads/sec",
+      "Disk Writes/sec",
+      "% Disk Time",
+      "% Disk Read Time",
+      "% Disk Write Time",
+    ]
+    Measurement = "win_diskio"
+
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "Network Interface"
+    Instances = ["*"]
+    Counters = [
+      "Bytes Received/sec",
+      "Bytes Sent/sec",
+      "Packets Received/sec",
+      "Packets Sent/sec",
+      "Packets Received Discarded",
+      "Packets Outbound Discarded",
+      "Packets Received Errors",
+      "Packets Outbound Errors",
+    ]
+    Measurement = "win_net"
+
+  [[inputs.win_perf_counters.object]]
+    ObjectName = "System"
+    Counters = [
+      "Context Switches/sec",
+      "System Calls/sec",
+      "Processor Queue Length",
+      "System Up Time",
+    ]
+    Instances = ["------"]
+    Measurement = "win_system"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    # Example query where the Instance portion must be removed to get data back,
+    # such as from the Memory object.
+    ObjectName = "Memory"
+    Counters = [
+      "Available Bytes",
+      "Cache Faults/sec",
+      "Demand Zero Faults/sec",
+      "Page Faults/sec",
+      "Pages/sec",
+      "Transition Faults/sec",
+      "Pool Nonpaged Bytes",
+      "Pool Paged Bytes",
+      "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 = ["------"]
+    Measurement = "win_mem"
+    # Set to true to include _Total instance when querying for all (*).
+    #IncludeTotal=false
+
+  [[inputs.win_perf_counters.object]]
+    # Example query where the Instance portion must be removed to get data back,
+    # such as from the Paging File object.
+    ObjectName = "Paging File"
+    Counters = [
+      "% Usage",
+    ]
+    Instances = ["_Total"]
+    Measurement = "win_swap"
+
+
+# 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
+#   ## 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 stats will be gathered for all mount points.
+#   ## Set mount_points will restrict the stats to only the specified mount points.
+#   # mount_points = ["/"]
+#
+#   ## Ignore mount points by filesystem type.
+#   ignore_fs = ["tmpfs", "devtmpfs", "devfs", "overlay", "aufs", "squashfs"]
+
+
+# # Read metrics about disk IO by device
+# [[inputs.diskio]]
+#   ## By default, telegraf will gather stats for all devices including
+#   ## disk partitions.
+#   ## Setting devices will restrict the stats to the specified devices.
+#   # devices = ["sda", "sdb", "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
+# [[inputs.mem]]
+#   # no configuration
+
+
+# # Read metrics about swap memory usage
+# [[inputs.swap]]
+#   # no configuration

filter/filter.go

@@ -0,0 +1,116 @@
+package filter
+
+import (
+	"strings"
+
+	"github.com/gobwas/glob"
+)
+
+type Filter interface {
+	Match(string) bool
+}
+
+// Compile takes a list of string filters and returns a Filter interface
+// for matching a given string against the filter list. The filter list
+// supports glob matching too, ie:
+//
+//   f, _ := Compile([]string{"cpu", "mem", "net*"})
+//   f.Match("cpu")     // true
+//   f.Match("network") // true
+//   f.Match("memory")  // false
+//
+func Compile(filters []string) (Filter, error) {
+	// return if there is nothing to compile
+	if len(filters) == 0 {
+		return nil, nil
+	}
+
+	// check if we can compile a non-glob filter
+	noGlob := true
+	for _, filter := range filters {
+		if hasMeta(filter) {
+			noGlob = false
+			break
+		}
+	}
+
+	switch {
+	case noGlob:
+		// return non-globbing filter if not needed.
+		return compileFilterNoGlob(filters), nil
+	case len(filters) == 1:
+		return glob.Compile(filters[0])
+	default:
+		return glob.Compile("{" + strings.Join(filters, ",") + "}")
+	}
+}
+
+// hasMeta reports whether path contains any magic glob characters.
+func hasMeta(s string) bool {
+	return strings.IndexAny(s, "*?[") >= 0
+}
+
+type filter struct {
+	m map[string]struct{}
+}
+
+func (f *filter) Match(s string) bool {
+	_, ok := f.m[s]
+	return ok
+}
+
+type filtersingle struct {
+	s string
+}
+
+func (f *filtersingle) Match(s string) bool {
+	return f.s == s
+}
+
+func compileFilterNoGlob(filters []string) Filter {
+	if len(filters) == 1 {
+		return &filtersingle{s: filters[0]}
+	}
+	out := filter{m: make(map[string]struct{})}
+	for _, filter := range filters {
+		out.m[filter] = struct{}{}
+	}
+	return &out
+}
+
+type IncludeExcludeFilter struct {
+	include Filter
+	exclude Filter
+}
+
+func NewIncludeExcludeFilter(
+	include []string,
+	exclude []string,
+) (Filter, error) {
+	in, err := Compile(include)
+	if err != nil {
+		return nil, err
+	}
+
+	ex, err := Compile(exclude)
+	if err != nil {
+		return nil, err
+	}
+
+	return &IncludeExcludeFilter{in, ex}, nil
+}
+
+func (f *IncludeExcludeFilter) Match(s string) bool {
+	if f.include != nil {
+		if !f.include.Match(s) {
+			return false
+		}
+	}
+
+	if f.exclude != nil {
+		if f.exclude.Match(s) {
+			return false
+		}
+	}
+	return true
+}

filter/filter_test.go

@@ -0,0 +1,114 @@
+package filter
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCompile(t *testing.T) {
+	f, err := Compile([]string{})
+	assert.NoError(t, err)
+	assert.Nil(t, f)
+
+	f, err = Compile([]string{"cpu"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.False(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu*"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.True(t, f.Match("cpu0"))
+	assert.False(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu", "mem"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.True(t, f.Match("mem"))
+
+	f, err = Compile([]string{"cpu", "mem", "net*"})
+	assert.NoError(t, err)
+	assert.True(t, f.Match("cpu"))
+	assert.False(t, f.Match("cpu0"))
+	assert.True(t, f.Match("mem"))
+	assert.True(t, f.Match("network"))
+}
+
+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) {
+	f, _ := Compile([]string{"cpu"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilterSingleNoGlobTrue(b *testing.B) {
+	f, _ := Compile([]string{"cpu"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("cpu")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter(b *testing.B) {
+	f, _ := Compile([]string{"cpu", "mem", "net*"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilterNoGlob(b *testing.B) {
+	f, _ := Compile([]string{"cpu", "mem", "net"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("net")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter2(b *testing.B) {
+	f, _ := Compile([]string{"aa", "bb", "c", "ad", "ar", "at", "aq",
+		"aw", "az", "axxx", "ab", "cpu", "mem", "net*"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("network")
+	}
+	benchbool = tmp
+}
+
+func BenchmarkFilter2NoGlob(b *testing.B) {
+	f, _ := Compile([]string{"aa", "bb", "c", "ad", "ar", "at", "aq",
+		"aw", "az", "axxx", "ab", "cpu", "mem", "net"})
+	var tmp bool
+	for n := 0; n < b.N; n++ {
+		tmp = f.Match("net")
+	}
+	benchbool = tmp
+}

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/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/config.go

@@ -1,721 +0,0 @@
-package config
-
-import (
-	"errors"
-	"fmt"
-	"io/ioutil"
-	"log"
-	"path/filepath"
-	"sort"
-	"strings"
-	"time"
-
-	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/internal"
-	"github.com/influxdata/telegraf/internal/models"
-	"github.com/influxdata/telegraf/plugins/inputs"
-	"github.com/influxdata/telegraf/plugins/outputs"
-	"github.com/influxdata/telegraf/plugins/parsers"
-	"github.com/influxdata/telegraf/plugins/serializers"
-
-	"github.com/influxdata/config"
-	"github.com/naoina/toml/ast"
-)
-
-// Config specifies the URL/user/password for the database that telegraf
-// will be logging to, as well as all the plugins that the user has
-// specified
-type Config struct {
-	Tags          map[string]string
-	InputFilters  []string
-	OutputFilters []string
-
-	Agent   *AgentConfig
-	Inputs  []*internal_models.RunningInput
-	Outputs []*internal_models.RunningOutput
-}
-
-func NewConfig() *Config {
-	c := &Config{
-		// Agent defaults:
-		Agent: &AgentConfig{
-			Interval:      internal.Duration{Duration: 10 * time.Second},
-			RoundInterval: true,
-			FlushInterval: internal.Duration{Duration: 10 * time.Second},
-			FlushJitter:   internal.Duration{Duration: 5 * time.Second},
-		},
-
-		Tags:          make(map[string]string),
-		Inputs:        make([]*internal_models.RunningInput, 0),
-		Outputs:       make([]*internal_models.RunningOutput, 0),
-		InputFilters:  make([]string, 0),
-		OutputFilters: make([]string, 0),
-	}
-	return c
-}
-
-type AgentConfig struct {
-	// Interval at which to gather information
-	Interval internal.Duration
-
-	// RoundInterval rounds collection interval to 'interval'.
-	//     ie, if Interval=10s then always collect on :00, :10, :20, etc.
-	RoundInterval bool
-
-	// CollectionJitter 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.
-	CollectionJitter internal.Duration
-
-	// FlushInterval is the Interval at which to flush data
-	FlushInterval internal.Duration
-
-	// FlushJitter 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
-	FlushJitter internal.Duration
-
-	// MetricBufferLimit is the max number of metrics that each output plugin
-	// will cache. The buffer is cleared when a successful write occurs. When
-	// full, the oldest metrics will be overwritten.
-	MetricBufferLimit int
-
-	// FlushBufferWhenFull tells Telegraf to flush the metric buffer whenever
-	// it fills up, regardless of FlushInterval. Setting this option to true
-	// does _not_ deactivate FlushInterval.
-	FlushBufferWhenFull bool
-
-	// TODO(cam): Remove UTC and Precision parameters, they are no longer
-	// valid for the agent config. Leaving them here for now for backwards-
-	// compatability
-	UTC       bool `toml:"utc"`
-	Precision string
-
-	// Debug is the option for running in debug mode
-	Debug bool
-
-	// Quiet is the option for running in quiet mode
-	Quiet    bool
-	Hostname string
-}
-
-// Inputs returns a list of strings of the configured inputs.
-func (c *Config) InputNames() []string {
-	var name []string
-	for _, input := range c.Inputs {
-		name = append(name, input.Name)
-	}
-	return name
-}
-
-// Outputs returns a list of strings of the configured inputs.
-func (c *Config) OutputNames() []string {
-	var name []string
-	for _, output := range c.Outputs {
-		name = append(name, output.Name)
-	}
-	return name
-}
-
-// ListTags returns a string of tags specified in the config,
-// line-protocol style
-func (c *Config) ListTags() string {
-	var tags []string
-
-	for k, v := range c.Tags {
-		tags = append(tags, fmt.Sprintf("%s=%s", k, v))
-	}
-
-	sort.Strings(tags)
-
-	return strings.Join(tags, " ")
-}
-
-var header = `# Telegraf Configuration
-
-# Telegraf is entirely plugin driven. All metrics are gathered from the
-# declared inputs, and sent to the declared outputs.
-
-# Plugins must be declared in here to be active.
-# To deactivate a plugin, comment out the name and any variables.
-
-# Use 'telegraf -config telegraf.conf -test' to see what metrics a config
-# file would generate.
-
-# Global tags can be specified here in key="value" format.
-[global_tags]
-  # dc = "us-east-1" # will tag all metrics with dc=us-east-1
-  # rack = "1a"
-
-# Configuration for telegraf agent
-[agent]
-  ## Default data collection interval for all inputs
-  interval = "10s"
-  ## Rounds collection interval to 'interval'
-  ## ie, if interval="10s" then always collect on :00, :10, :20, etc.
-  round_interval = true
-
-  ## Telegraf will cache metric_buffer_limit metrics for each output, and will
-  ## flush this buffer on a successful write.
-  metric_buffer_limit = 10000
-  ## Flush the buffer whenever full, regardless of flush_interval.
-  flush_buffer_when_full = true
-
-  ## Collection jitter is used to jitter the collection by a random amount.
-  ## Each plugin will sleep for a random time within jitter before collecting.
-  ## This can be used to avoid many plugins querying things like sysfs at the
-  ## same time, which can have a measurable effect on the system.
-  collection_jitter = "0s"
-
-  ## Default flushing interval for all outputs. You shouldn't set this below
-  ## interval. Maximum flush_interval will be flush_interval + flush_jitter
-  flush_interval = "10s"
-  ## Jitter the flush interval by a random amount. This is primarily to avoid
-  ## large write spikes for users running a large number of telegraf instances.
-  ## ie, a jitter of 5s and interval 10s means flushes will happen every 10-15s
-  flush_jitter = "0s"
-
-  ## Run telegraf in debug mode
-  debug = false
-  ## Run telegraf in quiet mode
-  quiet = false
-  ## Override default hostname, if empty use os.Hostname()
-  hostname = ""
-
-
-###############################################################################
-#                                  OUTPUTS                                    #
-###############################################################################
-
-`
-
-var pluginHeader = `
-
-###############################################################################
-#                                  INPUTS                                     #
-###############################################################################
-
-`
-
-var serviceInputHeader = `
-
-###############################################################################
-#                              SERVICE INPUTS                                 #
-###############################################################################
-`
-
-// PrintSampleConfig prints the sample config
-func PrintSampleConfig(pluginFilters []string, outputFilters []string) {
-	fmt.Printf(header)
-
-	// Filter outputs
-	var onames []string
-	for oname := range outputs.Outputs {
-		if len(outputFilters) == 0 || sliceContains(oname, outputFilters) {
-			onames = append(onames, oname)
-		}
-	}
-	sort.Strings(onames)
-
-	// Print Outputs
-	for _, oname := range onames {
-		creator := outputs.Outputs[oname]
-		output := creator()
-		printConfig(oname, output, "outputs")
-	}
-
-	// Filter inputs
-	var pnames []string
-	for pname := range inputs.Inputs {
-		if len(pluginFilters) == 0 || sliceContains(pname, pluginFilters) {
-			pnames = append(pnames, pname)
-		}
-	}
-	sort.Strings(pnames)
-
-	// Print Inputs
-	fmt.Printf(pluginHeader)
-	servInputs := make(map[string]telegraf.ServiceInput)
-	for _, pname := range pnames {
-		creator := inputs.Inputs[pname]
-		input := creator()
-
-		switch p := input.(type) {
-		case telegraf.ServiceInput:
-			servInputs[pname] = p
-			continue
-		}
-
-		printConfig(pname, input, "inputs")
-	}
-
-	// Print Service Inputs
-	fmt.Printf(serviceInputHeader)
-	for name, input := range servInputs {
-		printConfig(name, input, "inputs")
-	}
-}
-
-type printer interface {
-	Description() string
-	SampleConfig() string
-}
-
-func printConfig(name string, p printer, op string) {
-	fmt.Printf("\n# %s\n[[%s.%s]]", p.Description(), op, name)
-	config := p.SampleConfig()
-	if config == "" {
-		fmt.Printf("\n  # no configuration\n")
-	} else {
-		fmt.Printf(config)
-	}
-}
-
-func sliceContains(name string, list []string) bool {
-	for _, b := range list {
-		if b == name {
-			return true
-		}
-	}
-	return false
-}
-
-// PrintInputConfig prints the config usage of a single input.
-func PrintInputConfig(name string) error {
-	if creator, ok := inputs.Inputs[name]; ok {
-		printConfig(name, creator(), "inputs")
-	} else {
-		return errors.New(fmt.Sprintf("Input %s not found", name))
-	}
-	return nil
-}
-
-// PrintOutputConfig prints the config usage of a single output.
-func PrintOutputConfig(name string) error {
-	if creator, ok := outputs.Outputs[name]; ok {
-		printConfig(name, creator(), "outputs")
-	} else {
-		return errors.New(fmt.Sprintf("Output %s not found", name))
-	}
-	return nil
-}
-
-func (c *Config) LoadDirectory(path string) error {
-	directoryEntries, err := ioutil.ReadDir(path)
-	if err != nil {
-		return err
-	}
-	for _, entry := range directoryEntries {
-		if entry.IsDir() {
-			continue
-		}
-		name := entry.Name()
-		if len(name) < 6 || name[len(name)-5:] != ".conf" {
-			continue
-		}
-		err := c.LoadConfig(filepath.Join(path, name))
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// LoadConfig loads the given config file and applies it to c
-func (c *Config) LoadConfig(path string) error {
-	tbl, err := config.ParseFile(path)
-	if err != nil {
-		return err
-	}
-
-	for name, val := range tbl.Fields {
-		subTable, ok := val.(*ast.Table)
-		if !ok {
-			return errors.New("invalid configuration")
-		}
-
-		switch name {
-		case "agent":
-			if err = config.UnmarshalTable(subTable, c.Agent); err != nil {
-				log.Printf("Could not parse [agent] config\n")
-				return err
-			}
-		case "global_tags", "tags":
-			if err = config.UnmarshalTable(subTable, c.Tags); err != nil {
-				log.Printf("Could not parse [global_tags] config\n")
-				return err
-			}
-		case "outputs":
-			for pluginName, pluginVal := range subTable.Fields {
-				switch pluginSubTable := pluginVal.(type) {
-				case *ast.Table:
-					if err = c.addOutput(pluginName, pluginSubTable); err != nil {
-						return err
-					}
-				case []*ast.Table:
-					for _, t := range pluginSubTable {
-						if err = c.addOutput(pluginName, t); err != nil {
-							return err
-						}
-					}
-				default:
-					return fmt.Errorf("Unsupported config format: %s",
-						pluginName)
-				}
-			}
-		case "inputs", "plugins":
-			for pluginName, pluginVal := range subTable.Fields {
-				switch pluginSubTable := pluginVal.(type) {
-				case *ast.Table:
-					if err = c.addInput(pluginName, pluginSubTable); err != nil {
-						return err
-					}
-				case []*ast.Table:
-					for _, t := range pluginSubTable {
-						if err = c.addInput(pluginName, t); err != nil {
-							return err
-						}
-					}
-				default:
-					return fmt.Errorf("Unsupported config format: %s",
-						pluginName)
-				}
-			}
-		// Assume it's an input input for legacy config file support if no other
-		// identifiers are present
-		default:
-			if err = c.addInput(name, subTable); err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-func (c *Config) addOutput(name string, table *ast.Table) error {
-	if len(c.OutputFilters) > 0 && !sliceContains(name, c.OutputFilters) {
-		return nil
-	}
-	creator, ok := outputs.Outputs[name]
-	if !ok {
-		return fmt.Errorf("Undefined but requested output: %s", name)
-	}
-	output := creator()
-
-	// If the output has a SetSerializer function, then this means it can write
-	// arbitrary types of output, so build the serializer and set it.
-	switch t := output.(type) {
-	case serializers.SerializerOutput:
-		serializer, err := buildSerializer(name, table)
-		if err != nil {
-			return err
-		}
-		t.SetSerializer(serializer)
-	}
-
-	outputConfig, err := buildOutput(name, table)
-	if err != nil {
-		return err
-	}
-
-	if err := config.UnmarshalTable(table, output); err != nil {
-		return err
-	}
-
-	ro := internal_models.NewRunningOutput(name, output, outputConfig)
-	if c.Agent.MetricBufferLimit > 0 {
-		ro.MetricBufferLimit = c.Agent.MetricBufferLimit
-	}
-	ro.FlushBufferWhenFull = c.Agent.FlushBufferWhenFull
-	ro.Quiet = c.Agent.Quiet
-	c.Outputs = append(c.Outputs, ro)
-	return nil
-}
-
-func (c *Config) addInput(name string, table *ast.Table) error {
-	if len(c.InputFilters) > 0 && !sliceContains(name, c.InputFilters) {
-		return nil
-	}
-	// Legacy support renaming io input to diskio
-	if name == "io" {
-		name = "diskio"
-	}
-
-	creator, ok := inputs.Inputs[name]
-	if !ok {
-		return fmt.Errorf("Undefined but requested input: %s", name)
-	}
-	input := creator()
-
-	// If the input has a SetParser function, then this means it can accept
-	// arbitrary types of input, so build the parser and set it.
-	switch t := input.(type) {
-	case parsers.ParserInput:
-		parser, err := buildParser(name, table)
-		if err != nil {
-			return err
-		}
-		t.SetParser(parser)
-	}
-
-	pluginConfig, err := buildInput(name, table)
-	if err != nil {
-		return err
-	}
-
-	if err := config.UnmarshalTable(table, input); err != nil {
-		return err
-	}
-
-	rp := &internal_models.RunningInput{
-		Name:   name,
-		Input:  input,
-		Config: pluginConfig,
-	}
-	c.Inputs = append(c.Inputs, rp)
-	return nil
-}
-
-// buildFilter builds a Filter (tagpass/tagdrop/pass/drop) to
-// be inserted into the internal_models.OutputConfig/internal_models.InputConfig to be used for prefix
-// filtering on tags and measurements
-func buildFilter(tbl *ast.Table) internal_models.Filter {
-	f := internal_models.Filter{}
-
-	if node, ok := tbl.Fields["pass"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if ary, ok := kv.Value.(*ast.Array); ok {
-				for _, elem := range ary.Value {
-					if str, ok := elem.(*ast.String); ok {
-						f.Pass = append(f.Pass, str.Value)
-						f.IsActive = true
-					}
-				}
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["drop"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if ary, ok := kv.Value.(*ast.Array); ok {
-				for _, elem := range ary.Value {
-					if str, ok := elem.(*ast.String); ok {
-						f.Drop = append(f.Drop, str.Value)
-						f.IsActive = true
-					}
-				}
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["tagpass"]; ok {
-		if subtbl, ok := node.(*ast.Table); ok {
-			for name, val := range subtbl.Fields {
-				if kv, ok := val.(*ast.KeyValue); ok {
-					tagfilter := &internal_models.TagFilter{Name: name}
-					if ary, ok := kv.Value.(*ast.Array); ok {
-						for _, elem := range ary.Value {
-							if str, ok := elem.(*ast.String); ok {
-								tagfilter.Filter = append(tagfilter.Filter, str.Value)
-							}
-						}
-					}
-					f.TagPass = append(f.TagPass, *tagfilter)
-					f.IsActive = true
-				}
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["tagdrop"]; ok {
-		if subtbl, ok := node.(*ast.Table); ok {
-			for name, val := range subtbl.Fields {
-				if kv, ok := val.(*ast.KeyValue); ok {
-					tagfilter := &internal_models.TagFilter{Name: name}
-					if ary, ok := kv.Value.(*ast.Array); ok {
-						for _, elem := range ary.Value {
-							if str, ok := elem.(*ast.String); ok {
-								tagfilter.Filter = append(tagfilter.Filter, str.Value)
-							}
-						}
-					}
-					f.TagDrop = append(f.TagDrop, *tagfilter)
-					f.IsActive = true
-				}
-			}
-		}
-	}
-
-	delete(tbl.Fields, "drop")
-	delete(tbl.Fields, "pass")
-	delete(tbl.Fields, "tagdrop")
-	delete(tbl.Fields, "tagpass")
-	return f
-}
-
-// buildInput parses input specific items from the ast.Table,
-// builds the filter and returns a
-// internal_models.InputConfig to be inserted into internal_models.RunningInput
-func buildInput(name string, tbl *ast.Table) (*internal_models.InputConfig, error) {
-	cp := &internal_models.InputConfig{Name: name}
-	if node, ok := tbl.Fields["interval"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				dur, err := time.ParseDuration(str.Value)
-				if err != nil {
-					return nil, err
-				}
-
-				cp.Interval = dur
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["name_prefix"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				cp.MeasurementPrefix = str.Value
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["name_suffix"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				cp.MeasurementSuffix = str.Value
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["name_override"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				cp.NameOverride = str.Value
-			}
-		}
-	}
-
-	cp.Tags = make(map[string]string)
-	if node, ok := tbl.Fields["tags"]; ok {
-		if subtbl, ok := node.(*ast.Table); ok {
-			if err := config.UnmarshalTable(subtbl, cp.Tags); err != nil {
-				log.Printf("Could not parse tags for input %s\n", name)
-			}
-		}
-	}
-
-	delete(tbl.Fields, "name_prefix")
-	delete(tbl.Fields, "name_suffix")
-	delete(tbl.Fields, "name_override")
-	delete(tbl.Fields, "interval")
-	delete(tbl.Fields, "tags")
-	cp.Filter = buildFilter(tbl)
-	return cp, nil
-}
-
-// buildParser grabs the necessary entries from the ast.Table for creating
-// a parsers.Parser object, and creates it, which can then be added onto
-// an Input object.
-func buildParser(name string, tbl *ast.Table) (parsers.Parser, error) {
-	c := &parsers.Config{}
-
-	if node, ok := tbl.Fields["data_format"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				c.DataFormat = str.Value
-			}
-		}
-	}
-
-	// Legacy support, exec plugin originally parsed JSON by default.
-	if name == "exec" && c.DataFormat == "" {
-		c.DataFormat = "json"
-	} else if c.DataFormat == "" {
-		c.DataFormat = "influx"
-	}
-
-	if node, ok := tbl.Fields["separator"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				c.Separator = str.Value
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["templates"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if ary, ok := kv.Value.(*ast.Array); ok {
-				for _, elem := range ary.Value {
-					if str, ok := elem.(*ast.String); ok {
-						c.Templates = append(c.Templates, str.Value)
-					}
-				}
-			}
-		}
-	}
-
-	if node, ok := tbl.Fields["tag_keys"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if ary, ok := kv.Value.(*ast.Array); ok {
-				for _, elem := range ary.Value {
-					if str, ok := elem.(*ast.String); ok {
-						c.TagKeys = append(c.TagKeys, str.Value)
-					}
-				}
-			}
-		}
-	}
-
-	c.MetricName = name
-
-	delete(tbl.Fields, "data_format")
-	delete(tbl.Fields, "separator")
-	delete(tbl.Fields, "templates")
-	delete(tbl.Fields, "tag_keys")
-
-	return parsers.NewParser(c)
-}
-
-// buildSerializer grabs the necessary entries from the ast.Table for creating
-// a serializers.Serializer object, and creates it, which can then be added onto
-// an Output object.
-func buildSerializer(name string, tbl *ast.Table) (serializers.Serializer, error) {
-	c := &serializers.Config{}
-
-	if node, ok := tbl.Fields["data_format"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				c.DataFormat = str.Value
-			}
-		}
-	}
-
-	if c.DataFormat == "" {
-		c.DataFormat = "influx"
-	}
-
-	if node, ok := tbl.Fields["prefix"]; ok {
-		if kv, ok := node.(*ast.KeyValue); ok {
-			if str, ok := kv.Value.(*ast.String); ok {
-				c.Prefix = str.Value
-			}
-		}
-	}
-
-	delete(tbl.Fields, "data_format")
-	delete(tbl.Fields, "prefix")
-	return serializers.NewSerializer(c)
-}
-
-// buildOutput parses output specific items from the ast.Table, builds the filter and returns an
-// internal_models.OutputConfig to be inserted into internal_models.RunningInput
-// Note: error exists in the return for future calls that might require error
-func buildOutput(name string, tbl *ast.Table) (*internal_models.OutputConfig, error) {
-	oc := &internal_models.OutputConfig{
-		Name:   name,
-		Filter: buildFilter(tbl),
-	}
-	return oc, nil
-}

internal/config/config_test.go

@@ -1,125 +0,0 @@
-package config
-
-import (
-	"testing"
-	"time"
-
-	"github.com/influxdata/telegraf/internal/models"
-	"github.com/influxdata/telegraf/plugins/inputs"
-	"github.com/influxdata/telegraf/plugins/inputs/exec"
-	"github.com/influxdata/telegraf/plugins/inputs/memcached"
-	"github.com/influxdata/telegraf/plugins/inputs/procstat"
-	"github.com/influxdata/telegraf/plugins/parsers"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestConfig_LoadSingleInput(t *testing.T) {
-	c := NewConfig()
-	c.LoadConfig("./testdata/single_plugin.toml")
-
-	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
-	memcached.Servers = []string{"localhost"}
-
-	mConfig := &internal_models.InputConfig{
-		Name: "memcached",
-		Filter: internal_models.Filter{
-			Drop: []string{"other", "stuff"},
-			Pass: []string{"some", "strings"},
-			TagDrop: []internal_models.TagFilter{
-				internal_models.TagFilter{
-					Name:   "badtag",
-					Filter: []string{"othertag"},
-				},
-			},
-			TagPass: []internal_models.TagFilter{
-				internal_models.TagFilter{
-					Name:   "goodtag",
-					Filter: []string{"mytag"},
-				},
-			},
-			IsActive: true,
-		},
-		Interval: 5 * time.Second,
-	}
-	mConfig.Tags = make(map[string]string)
-
-	assert.Equal(t, memcached, c.Inputs[0].Input,
-		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Inputs[0].Config,
-		"Testdata did not produce correct memcached metadata.")
-}
-
-func TestConfig_LoadDirectory(t *testing.T) {
-	c := NewConfig()
-	err := c.LoadConfig("./testdata/single_plugin.toml")
-	if err != nil {
-		t.Error(err)
-	}
-	err = c.LoadDirectory("./testdata/subconfig")
-	if err != nil {
-		t.Error(err)
-	}
-
-	memcached := inputs.Inputs["memcached"]().(*memcached.Memcached)
-	memcached.Servers = []string{"localhost"}
-
-	mConfig := &internal_models.InputConfig{
-		Name: "memcached",
-		Filter: internal_models.Filter{
-			Drop: []string{"other", "stuff"},
-			Pass: []string{"some", "strings"},
-			TagDrop: []internal_models.TagFilter{
-				internal_models.TagFilter{
-					Name:   "badtag",
-					Filter: []string{"othertag"},
-				},
-			},
-			TagPass: []internal_models.TagFilter{
-				internal_models.TagFilter{
-					Name:   "goodtag",
-					Filter: []string{"mytag"},
-				},
-			},
-			IsActive: true,
-		},
-		Interval: 5 * time.Second,
-	}
-	mConfig.Tags = make(map[string]string)
-
-	assert.Equal(t, memcached, c.Inputs[0].Input,
-		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Inputs[0].Config,
-		"Testdata did not produce correct memcached metadata.")
-
-	ex := inputs.Inputs["exec"]().(*exec.Exec)
-	p, err := parsers.NewJSONParser("exec", nil, nil)
-	assert.NoError(t, err)
-	ex.SetParser(p)
-	ex.Command = "/usr/bin/myothercollector --foo=bar"
-	eConfig := &internal_models.InputConfig{
-		Name:              "exec",
-		MeasurementSuffix: "_myothercollector",
-	}
-	eConfig.Tags = make(map[string]string)
-	assert.Equal(t, ex, c.Inputs[1].Input,
-		"Merged Testdata did not produce a correct exec struct.")
-	assert.Equal(t, eConfig, c.Inputs[1].Config,
-		"Merged Testdata did not produce correct exec metadata.")
-
-	memcached.Servers = []string{"192.168.1.1"}
-	assert.Equal(t, memcached, c.Inputs[2].Input,
-		"Testdata did not produce a correct memcached struct.")
-	assert.Equal(t, mConfig, c.Inputs[2].Config,
-		"Testdata did not produce correct memcached metadata.")
-
-	pstat := inputs.Inputs["procstat"]().(*procstat.Procstat)
-	pstat.PidFile = "/var/run/grafana-server.pid"
-
-	pConfig := &internal_models.InputConfig{Name: "procstat"}
-	pConfig.Tags = make(map[string]string)
-
-	assert.Equal(t, pstat, c.Inputs[3].Input,
-		"Merged Testdata did not produce a correct procstat struct.")
-	assert.Equal(t, pConfig, c.Inputs[3].Config,
-		"Merged Testdata did not produce correct procstat metadata.")
-}

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

@@ -0,0 +1,122 @@
+package globpath
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gobwas/glob"
+	"github.com/karrick/godirwalk"
+)
+
+type GlobPath struct {
+	path         string
+	hasMeta      bool
+	HasSuperMeta bool
+	rootGlob     string
+	g            glob.Glob
+}
+
+func Compile(path string) (*GlobPath, error) {
+	out := GlobPath{
+		hasMeta:      hasMeta(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
+	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
+	}
+	return &out, nil
+}
+
+// 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 {
+		return []string{g.path}
+	}
+	if !g.HasSuperMeta {
+		files, _ := filepath.Glob(g.path)
+		return files
+	}
+	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
+
+	}
+	for _, root := range roots {
+		fileinfo, err := os.Stat(root)
+		if err != nil {
+			continue
+		}
+		if !fileinfo.IsDir() {
+			if g.MatchString(root) {
+				out = append(out, root)
+			}
+			continue
+		}
+		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
+}
+
+// hasSuperMeta reports whether path contains any super magic glob characters (**).
+func hasSuperMeta(path string) bool {
+	return strings.Index(path, "**") >= 0
+}

internal/globpath/globpath_test.go

@@ -0,0 +1,100 @@
+package globpath
+
+import (
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCompileAndMatch(t *testing.T) {
+	dir := getTestdataDir()
+	// test super asterisk
+	g1, err := Compile(dir + "/**")
+	require.NoError(t, err)
+	// test single asterisk
+	g2, err := Compile(dir + "/*.log")
+	require.NoError(t, err)
+	// test no meta characters (file exists)
+	g3, err := Compile(dir + "/log1.log")
+	require.NoError(t, err)
+	// test file that doesn't exist
+	g4, err := Compile(dir + "/i_dont_exist.log")
+	require.NoError(t, err)
+	// test super asterisk that doesn't exist
+	g5, err := Compile(dir + "/dir_doesnt_exist/**")
+	require.NoError(t, err)
+
+	matches := g1.Match()
+	require.Len(t, matches, 6)
+	matches = g2.Match()
+	require.Len(t, matches, 2)
+	matches = g3.Match()
+	require.Len(t, matches, 1)
+	matches = g4.Match()
+	require.Len(t, matches, 1)
+	matches = g5.Match()
+	require.Len(t, matches, 0)
+}
+
+func TestRootGlob(t *testing.T) {
+	dir := getTestdataDir()
+	tests := []struct {
+		input  string
+		output string
+	}{
+		{dir + "/**", dir + "/*"},
+		{dir + "/nested?/**", dir + "/nested?/*"},
+		{dir + "/ne**/nest*", dir + "/ne*"},
+		{dir + "/nested?/*", ""},
+	}
+
+	for _, test := range tests {
+		actual, _ := Compile(test.input)
+		require.Equal(t, actual.rootGlob, test.output)
+	}
+}
+
+func TestFindNestedTextFile(t *testing.T) {
+	dir := getTestdataDir()
+	// test super asterisk
+	g1, err := Compile(dir + "/**.txt")
+	require.NoError(t, err)
+
+	matches := g1.Match()
+	require.Len(t, matches, 1)
+}
+
+func getTestdataDir() string {
+	_, filename, _, _ := runtime.Caller(1)
+	return strings.Replace(filename, "globpath_test.go", "testdata", 1)
+}
+
+func TestMatch_ErrPermission(t *testing.T) {
+	tests := []struct {
+		input    string
+		expected []string
+	}{
+		{"/root/foo", []string{"/root/foo"}},
+		{"/root/f*", []string(nil)},
+	}
+
+	for _, test := range tests {
+		glob, err := Compile(test.input)
+		require.NoError(t, err)
+		actual := glob.Match()
+		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/globpath/testdata/test.conf

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

internal/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

@@ -2,37 +2,144 @@ package internal
 
 import (
 	"bufio"
-	"crypto/rand"
-	"crypto/tls"
-	"crypto/x509"
+	"bytes"
+	"compress/gzip"
+	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
+	"math"
+	"math/rand"
 	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
 	"strings"
+	"sync"
+	"syscall"
 	"time"
+	"unicode"
+
+	"github.com/alecthomas/units"
 )
 
 const alphanum string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
 
+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 {
-	dur, err := time.ParseDuration(string(b[1 : len(b)-1]))
-	if err != nil {
-		return err
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	// see if we can directly convert it
+	d.Duration, err = time.ParseDuration(string(b))
+	if err == nil {
+		return nil
 	}
 
-	d.Duration = dur
+	// Parse string duration, ie, "1s"
+	if uq, err := strconv.Unquote(string(b)); err == nil && len(uq) > 0 {
+		d.Duration, err = time.ParseDuration(uq)
+		if err == nil {
+			return nil
+		}
+	}
+
+	// First try parsing as integer seconds
+	sI, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sI)
+		return nil
+	}
+	// Second try parsing as float seconds
+	sF, err := strconv.ParseFloat(string(b), 64)
+	if err == nil {
+		d.Duration = time.Second * time.Duration(sF)
+		return nil
+	}
 
 	return nil
 }
 
-var NotImplementedError = errors.New("not implemented yet")
+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).
@@ -79,99 +186,239 @@ func RandomString(n int) string {
 	return string(bytes)
 }
 
-// GetTLSConfig gets a tls.Config object from the given certs, key, and CA files.
-// you must give the full path to the files.
-// If all files are blank and InsecureSkipVerify=false, returns a nil pointer.
-func GetTLSConfig(
-	SSLCert, SSLKey, SSLCA string,
-	InsecureSkipVerify bool,
-) (*tls.Config, error) {
-	t := &tls.Config{}
-	if SSLCert != "" && SSLKey != "" && SSLCA != "" {
-		cert, err := tls.LoadX509KeyPair(SSLCert, SSLKey)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf(
-				"Could not load TLS client key/certificate: %s",
-				err))
-		}
+// SnakeCase converts the given string to snake case following the Golang format:
+// acronyms are converted to lower-case and preceded by an underscore.
+func SnakeCase(in string) string {
+	runes := []rune(in)
+	length := len(runes)
 
-		caCert, err := ioutil.ReadFile(SSLCA)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("Could not load TLS CA: %s",
-				err))
-		}
-
-		caCertPool := x509.NewCertPool()
-		caCertPool.AppendCertsFromPEM(caCert)
-
-		t = &tls.Config{
-			Certificates:       []tls.Certificate{cert},
-			RootCAs:            caCertPool,
-			InsecureSkipVerify: InsecureSkipVerify,
-		}
-	} else {
-		if InsecureSkipVerify {
-			t.InsecureSkipVerify = true
-		} else {
-			return nil, nil
+	var out []rune
+	for i := 0; i < length; i++ {
+		if i > 0 && unicode.IsUpper(runes[i]) && ((i+1 < length && unicode.IsLower(runes[i+1])) || unicode.IsLower(runes[i-1])) {
+			out = append(out, '_')
 		}
+		out = append(out, unicode.ToLower(runes[i]))
 	}
-	// will be nil by default if nothing is provided
-	return t, nil
+
+	return string(out)
 }
 
-// Glob will test a string pattern, potentially containing globs, against a
-// subject string. The result is a simple true/false, determining whether or
-// not the glob pattern matched the subject text.
+// RandomSleep will sleep for a random amount of time up to max.
+// If the shutdown channel is closed, it will return before it has finished
+// sleeping.
+func RandomSleep(max time.Duration, shutdown chan struct{}) {
+	if max == 0 {
+		return
+	}
+
+	sleepns := rand.Int63n(max.Nanoseconds())
+
+	t := time.NewTimer(time.Nanosecond * time.Duration(sleepns))
+	select {
+	case <-t.C:
+		return
+	case <-shutdown:
+		t.Stop()
+		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"
 //
-// Adapted from https://github.com/ryanuber/go-glob/blob/master/glob.go
-// thanks Ryan Uber!
-func Glob(pattern, measurement string) bool {
-	// Empty pattern can only match empty subject
-	if pattern == "" {
-		return measurement == pattern
+// 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
 	}
 
-	// If the pattern _is_ a glob, it matches everything
-	if pattern == "*" {
-		return true
+	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")
 	}
+}
 
-	parts := strings.Split(pattern, "*")
-
-	if len(parts) == 1 {
-		// No globs in pattern, so test for match
-		return pattern == measurement
-	}
-
-	leadingGlob := strings.HasPrefix(pattern, "*")
-	trailingGlob := strings.HasSuffix(pattern, "*")
-	end := len(parts) - 1
-
-	for i, part := range parts {
-		switch i {
-		case 0:
-			if leadingGlob {
-				continue
-			}
-			if !strings.HasPrefix(measurement, part) {
-				return false
-			}
-		case end:
-			if len(measurement) > 0 {
-				return trailingGlob || strings.HasSuffix(measurement, part)
-			}
-		default:
-			if !strings.Contains(measurement, part) {
-				return false
-			}
+// 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])
 		}
 
-		// Trim evaluated text from measurement as we loop over the pattern.
-		idx := strings.Index(measurement, part) + len(part)
-		measurement = measurement[idx:]
+		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
 	}
 
-	// All parts of the pattern matched
-	return true
+	// 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

@@ -1,44 +1,491 @@
 package internal
 
-import "testing"
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/rand"
+	"io"
+	"io/ioutil"
+	"log"
+	"os/exec"
+	"regexp"
+	"testing"
+	"time"
 
-func testGlobMatch(t *testing.T, pattern, subj string) {
-	if !Glob(pattern, subj) {
-		t.Errorf("%s should match %s", pattern, subj)
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type SnakeTest struct {
+	input  string
+	output string
+}
+
+var tests = []SnakeTest{
+	{"a", "a"},
+	{"snake", "snake"},
+	{"A", "a"},
+	{"ID", "id"},
+	{"MOTD", "motd"},
+	{"Snake", "snake"},
+	{"SnakeTest", "snake_test"},
+	{"APIResponse", "api_response"},
+	{"SnakeID", "snake_id"},
+	{"SnakeIDGoogle", "snake_id_google"},
+	{"LinuxMOTD", "linux_motd"},
+	{"OMGWTFBBQ", "omgwtfbbq"},
+	{"omg_wtf_bbq", "omg_wtf_bbq"},
+}
+
+func TestSnakeCase(t *testing.T) {
+	for _, test := range tests {
+		if SnakeCase(test.input) != test.output {
+			t.Errorf(`SnakeCase("%s"), wanted "%s", got \%s"`, test.input, test.output, SnakeCase(test.input))
+		}
 	}
 }
 
-func testGlobNoMatch(t *testing.T, pattern, subj string) {
-	if Glob(pattern, subj) {
-		t.Errorf("%s should not match %s", pattern, subj)
+var (
+	sleepbin, _ = exec.LookPath("sleep")
+	echobin, _  = exec.LookPath("echo")
+	shell, _    = exec.LookPath("sh")
+)
+
+func TestRunTimeout(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping test due to random failures.")
+	}
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(sleepbin, "10")
+	start := time.Now()
+	err := RunTimeout(cmd, time.Millisecond*20)
+	elapsed := time.Since(start)
+
+	assert.Equal(t, TimeoutErr, err)
+	// Verify that command gets killed in 20ms, with some breathing room
+	assert.True(t, elapsed < time.Millisecond*75)
+}
+
+// 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.")
+	if sleepbin == "" {
+		t.Skip("'sleep' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(sleepbin, "10")
+	start := time.Now()
+	_, err := CombinedOutputTimeout(cmd, time.Millisecond*20)
+	elapsed := time.Since(start)
+
+	assert.Equal(t, TimeoutErr, err)
+	// Verify that command gets killed in 20ms, with some breathing room
+	assert.True(t, elapsed < time.Millisecond*75)
+}
+
+func TestCombinedOutput(t *testing.T) {
+	if echobin == "" {
+		t.Skip("'echo' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(echobin, "foo")
+	out, err := CombinedOutputTimeout(cmd, time.Second)
+
+	assert.NoError(t, err)
+	assert.Equal(t, "foo\n", string(out))
+}
+
+// test that CombinedOutputTimeout and exec.Cmd.CombinedOutput return
+// the same output from a failed command.
+func TestCombinedOutputError(t *testing.T) {
+	if shell == "" {
+		t.Skip("'sh' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(shell, "-c", "false")
+	expected, err := cmd.CombinedOutput()
+
+	cmd2 := exec.Command(shell, "-c", "false")
+	actual, err := CombinedOutputTimeout(cmd2, time.Second)
+
+	assert.Error(t, err)
+	assert.Equal(t, expected, actual)
+}
+
+func TestRunError(t *testing.T) {
+	if shell == "" {
+		t.Skip("'sh' binary not available on OS, skipping.")
+	}
+	cmd := exec.Command(shell, "-c", "false")
+	err := RunTimeout(cmd, time.Second)
+
+	assert.Error(t, err)
+}
+
+func TestRandomSleep(t *testing.T) {
+	// TODO: Fix this test
+	t.Skip("Test failing too often, skip for now and revisit later.")
+	// test that zero max returns immediately
+	s := time.Now()
+	RandomSleep(time.Duration(0), make(chan struct{}))
+	elapsed := time.Since(s)
+	assert.True(t, elapsed < time.Millisecond)
+
+	// test that max sleep is respected
+	s = time.Now()
+	RandomSleep(time.Millisecond*50, make(chan struct{}))
+	elapsed = time.Since(s)
+	assert.True(t, elapsed < time.Millisecond*100)
+
+	// test that shutdown is respected
+	s = time.Now()
+	shutdown := make(chan struct{})
+	go func() {
+		time.Sleep(time.Millisecond * 100)
+		close(shutdown)
+	}()
+	RandomSleep(time.Second, shutdown)
+	elapsed = time.Since(s)
+	assert.True(t, elapsed < time.Millisecond*150)
+}
+
+func TestDuration(t *testing.T) {
+	var d Duration
+
+	d.UnmarshalTOML([]byte(`"1s"`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`1s`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`'1s'`))
+	assert.Equal(t, time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`10`))
+	assert.Equal(t, 10*time.Second, d.Duration)
+
+	d = Duration{}
+	d.UnmarshalTOML([]byte(`1.5`))
+	assert.Equal(t, time.Second, d.Duration)
+}
+
+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 TestEmptyPattern(t *testing.T) {
-	testGlobMatch(t, "", "")
-	testGlobNoMatch(t, "", "test")
-}
-
-func TestPatternWithoutGlobs(t *testing.T) {
-	testGlobMatch(t, "test", "test")
-}
-
-func TestGlob(t *testing.T) {
-	for _, pattern := range []string{
-		"*test",           // Leading glob
-		"this*",           // Trailing glob
-		"*is*a*",          // Lots of globs
-		"**test**",        // Double glob characters
-		"**is**a***test*", // Varying number of globs
-	} {
-		testGlobMatch(t, pattern, "this_is_a_test")
+func TestAlignTime(t *testing.T) {
+	rfc3339 := func(value string) time.Time {
+		t, _ := time.Parse(time.RFC3339, value)
+		return t
 	}
 
-	for _, pattern := range []string{
-		"test*", // Implicit substring match should fail
-		"*is",   // Partial match should fail
-		"*no*",  // Globs without a match between them should fail
-	} {
-		testGlobNoMatch(t, pattern, "this_is_a_test")
+	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/limiter/limiter.go

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

internal/models/filter.go

@@ -1,92 +0,0 @@
-package internal_models
-
-import (
-	"strings"
-
-	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/internal"
-)
-
-// TagFilter is the name of a tag, and the values on which to filter
-type TagFilter struct {
-	Name   string
-	Filter []string
-}
-
-// Filter containing drop/pass and tagdrop/tagpass rules
-type Filter struct {
-	Drop []string
-	Pass []string
-
-	TagDrop []TagFilter
-	TagPass []TagFilter
-
-	IsActive bool
-}
-
-func (f Filter) ShouldMetricPass(metric telegraf.Metric) bool {
-	if f.ShouldPass(metric.Name()) && f.ShouldTagsPass(metric.Tags()) {
-		return true
-	}
-	return false
-}
-
-// ShouldPass returns true if the metric should pass, false if should drop
-// based on the drop/pass filter parameters
-func (f Filter) ShouldPass(key string) bool {
-	if f.Pass != nil {
-		for _, pat := range f.Pass {
-			// TODO remove HasPrefix check, leaving it for now for legacy support.
-			// Cam, 2015-12-07
-			if strings.HasPrefix(key, pat) || internal.Glob(pat, key) {
-				return true
-			}
-		}
-		return false
-	}
-
-	if f.Drop != nil {
-		for _, pat := range f.Drop {
-			// TODO remove HasPrefix check, leaving it for now for legacy support.
-			// Cam, 2015-12-07
-			if strings.HasPrefix(key, pat) || internal.Glob(pat, key) {
-				return false
-			}
-		}
-
-		return true
-	}
-	return true
-}
-
-// ShouldTagsPass returns true if the metric should pass, false if should drop
-// based on the tagdrop/tagpass filter parameters
-func (f Filter) ShouldTagsPass(tags map[string]string) bool {
-	if f.TagPass != nil {
-		for _, pat := range f.TagPass {
-			if tagval, ok := tags[pat.Name]; ok {
-				for _, filter := range pat.Filter {
-					if internal.Glob(filter, tagval) {
-						return true
-					}
-				}
-			}
-		}
-		return false
-	}
-
-	if f.TagDrop != nil {
-		for _, pat := range f.TagDrop {
-			if tagval, ok := tags[pat.Name]; ok {
-				for _, filter := range pat.Filter {
-					if internal.Glob(filter, tagval) {
-						return false
-					}
-				}
-			}
-		}
-		return true
-	}
-
-	return true
-}

internal/models/filter_test.go

@@ -1,177 +0,0 @@
-package internal_models
-
-import (
-	"testing"
-)
-
-func TestFilter_Empty(t *testing.T) {
-	f := Filter{}
-
-	measurements := []string{
-		"foo",
-		"bar",
-		"barfoo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"supercalifradjulisticexpialidocious",
-	}
-
-	for _, measurement := range measurements {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-}
-
-func TestFilter_Pass(t *testing.T) {
-	f := Filter{
-		Pass: []string{"foo*", "cpu_usage_idle"},
-	}
-
-	passes := []string{
-		"foo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"cpu_usage_idle",
-	}
-
-	drops := []string{
-		"bar",
-		"barfoo",
-		"bar_foo",
-		"cpu_usage_busy",
-	}
-
-	for _, measurement := range passes {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-
-	for _, measurement := range drops {
-		if f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to drop", measurement)
-		}
-	}
-}
-
-func TestFilter_Drop(t *testing.T) {
-	f := Filter{
-		Drop: []string{"foo*", "cpu_usage_idle"},
-	}
-
-	drops := []string{
-		"foo",
-		"foo_bar",
-		"foo.bar",
-		"foo-bar",
-		"cpu_usage_idle",
-	}
-
-	passes := []string{
-		"bar",
-		"barfoo",
-		"bar_foo",
-		"cpu_usage_busy",
-	}
-
-	for _, measurement := range passes {
-		if !f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to pass", measurement)
-		}
-	}
-
-	for _, measurement := range drops {
-		if f.ShouldPass(measurement) {
-			t.Errorf("Expected measurement %s to drop", measurement)
-		}
-	}
-}
-
-func TestFilter_TagPass(t *testing.T) {
-	filters := []TagFilter{
-		TagFilter{
-			Name:   "cpu",
-			Filter: []string{"cpu-*"},
-		},
-		TagFilter{
-			Name:   "mem",
-			Filter: []string{"mem_free"},
-		}}
-	f := Filter{
-		TagPass: filters,
-	}
-
-	passes := []map[string]string{
-		{"cpu": "cpu-total"},
-		{"cpu": "cpu-0"},
-		{"cpu": "cpu-1"},
-		{"cpu": "cpu-2"},
-		{"mem": "mem_free"},
-	}
-
-	drops := []map[string]string{
-		{"cpu": "cputotal"},
-		{"cpu": "cpu0"},
-		{"cpu": "cpu1"},
-		{"cpu": "cpu2"},
-		{"mem": "mem_used"},
-	}
-
-	for _, tags := range passes {
-		if !f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to pass", tags)
-		}
-	}
-
-	for _, tags := range drops {
-		if f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to drop", tags)
-		}
-	}
-}
-
-func TestFilter_TagDrop(t *testing.T) {
-	filters := []TagFilter{
-		TagFilter{
-			Name:   "cpu",
-			Filter: []string{"cpu-*"},
-		},
-		TagFilter{
-			Name:   "mem",
-			Filter: []string{"mem_free"},
-		}}
-	f := Filter{
-		TagDrop: filters,
-	}
-
-	drops := []map[string]string{
-		{"cpu": "cpu-total"},
-		{"cpu": "cpu-0"},
-		{"cpu": "cpu-1"},
-		{"cpu": "cpu-2"},
-		{"mem": "mem_free"},
-	}
-
-	passes := []map[string]string{
-		{"cpu": "cputotal"},
-		{"cpu": "cpu0"},
-		{"cpu": "cpu1"},
-		{"cpu": "cpu2"},
-		{"mem": "mem_used"},
-	}
-
-	for _, tags := range passes {
-		if !f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to pass", tags)
-		}
-	}
-
-	for _, tags := range drops {
-		if f.ShouldTagsPass(tags) {
-			t.Errorf("Expected tags %v to drop", tags)
-		}
-	}
-}

internal/models/running_input.go

@@ -1,24 +0,0 @@
-package internal_models
-
-import (
-	"time"
-
-	"github.com/influxdata/telegraf"
-)
-
-type RunningInput struct {
-	Name   string
-	Input  telegraf.Input
-	Config *InputConfig
-}
-
-// 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
-}

internal/models/running_output.go

@@ -1,138 +0,0 @@
-package internal_models
-
-import (
-	"log"
-	"sync"
-	"time"
-
-	"github.com/influxdata/telegraf"
-)
-
-const (
-	// Default number of metrics kept between flushes.
-	DEFAULT_METRIC_BUFFER_LIMIT = 10000
-
-	// Limit how many full metric buffers are kept due to failed writes.
-	FULL_METRIC_BUFFERS_LIMIT = 100
-)
-
-type RunningOutput struct {
-	Name                string
-	Output              telegraf.Output
-	Config              *OutputConfig
-	Quiet               bool
-	MetricBufferLimit   int
-	FlushBufferWhenFull bool
-
-	metrics    []telegraf.Metric
-	tmpmetrics map[int][]telegraf.Metric
-	overwriteI int
-	mapI       int
-
-	sync.Mutex
-}
-
-func NewRunningOutput(
-	name string,
-	output telegraf.Output,
-	conf *OutputConfig,
-) *RunningOutput {
-	ro := &RunningOutput{
-		Name:              name,
-		metrics:           make([]telegraf.Metric, 0),
-		tmpmetrics:        make(map[int][]telegraf.Metric),
-		Output:            output,
-		Config:            conf,
-		MetricBufferLimit: DEFAULT_METRIC_BUFFER_LIMIT,
-	}
-	return ro
-}
-
-// AddMetric adds a metric to the output. This function can also write cached
-// points if FlushBufferWhenFull is true.
-func (ro *RunningOutput) AddMetric(metric telegraf.Metric) {
-	if ro.Config.Filter.IsActive {
-		if !ro.Config.Filter.ShouldMetricPass(metric) {
-			return
-		}
-	}
-	ro.Lock()
-	defer ro.Unlock()
-
-	if len(ro.metrics) < ro.MetricBufferLimit {
-		ro.metrics = append(ro.metrics, metric)
-	} else {
-		if ro.FlushBufferWhenFull {
-			ro.metrics = append(ro.metrics, metric)
-			tmpmetrics := make([]telegraf.Metric, len(ro.metrics))
-			copy(tmpmetrics, ro.metrics)
-			ro.metrics = make([]telegraf.Metric, 0)
-			err := ro.write(tmpmetrics)
-			if err != nil {
-				log.Printf("ERROR writing full metric buffer to output %s, %s",
-					ro.Name, err)
-				if len(ro.tmpmetrics) == FULL_METRIC_BUFFERS_LIMIT {
-					ro.mapI = 0
-					// overwrite one
-					ro.tmpmetrics[ro.mapI] = tmpmetrics
-					ro.mapI++
-				} else {
-					ro.tmpmetrics[ro.mapI] = tmpmetrics
-					ro.mapI++
-				}
-			}
-		} else {
-			log.Printf("WARNING: overwriting cached metrics, you may want to " +
-				"increase the metric_buffer_limit setting in your [agent] " +
-				"config if you do not wish to overwrite metrics.\n")
-			if ro.overwriteI == len(ro.metrics) {
-				ro.overwriteI = 0
-			}
-			ro.metrics[ro.overwriteI] = metric
-			ro.overwriteI++
-		}
-	}
-}
-
-// Write writes all cached points to this output.
-func (ro *RunningOutput) Write() error {
-	ro.Lock()
-	defer ro.Unlock()
-	err := ro.write(ro.metrics)
-	if err != nil {
-		return err
-	} else {
-		ro.metrics = make([]telegraf.Metric, 0)
-		ro.overwriteI = 0
-	}
-
-	// Write any cached metric buffers that failed previously
-	for i, tmpmetrics := range ro.tmpmetrics {
-		if err := ro.write(tmpmetrics); err != nil {
-			return err
-		} else {
-			delete(ro.tmpmetrics, i)
-		}
-	}
-
-	return nil
-}
-
-func (ro *RunningOutput) write(metrics []telegraf.Metric) error {
-	start := time.Now()
-	err := ro.Output.Write(metrics)
-	elapsed := time.Since(start)
-	if err == nil {
-		if !ro.Quiet {
-			log.Printf("Wrote %d metrics to output %s in %s\n",
-				len(metrics), ro.Name, elapsed)
-		}
-	}
-	return err
-}
-
-// OutputConfig containing name and filter
-type OutputConfig struct {
-	Name   string
-	Filter Filter
-}

internal/models/running_output_test.go

@@ -1,265 +0,0 @@
-package internal_models
-
-import (
-	"fmt"
-	"sort"
-	"sync"
-	"testing"
-
-	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/testutil"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-var first5 = []telegraf.Metric{
-	testutil.TestMetric(101, "metric1"),
-	testutil.TestMetric(101, "metric2"),
-	testutil.TestMetric(101, "metric3"),
-	testutil.TestMetric(101, "metric4"),
-	testutil.TestMetric(101, "metric5"),
-}
-
-var next5 = []telegraf.Metric{
-	testutil.TestMetric(101, "metric6"),
-	testutil.TestMetric(101, "metric7"),
-	testutil.TestMetric(101, "metric8"),
-	testutil.TestMetric(101, "metric9"),
-	testutil.TestMetric(101, "metric10"),
-}
-
-// Test that we can write metrics with simple default setup.
-func TestRunningOutputDefault(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	ro := NewRunningOutput("test", m, conf)
-
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	for _, metric := range next5 {
-		ro.AddMetric(metric)
-	}
-	assert.Len(t, m.Metrics(), 0)
-
-	err := ro.Write()
-	assert.NoError(t, err)
-	assert.Len(t, m.Metrics(), 10)
-}
-
-// Test that the first metric gets overwritten if there is a buffer overflow.
-func TestRunningOutputOverwrite(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	ro := NewRunningOutput("test", m, conf)
-	ro.MetricBufferLimit = 4
-
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	require.Len(t, m.Metrics(), 0)
-
-	err := ro.Write()
-	require.NoError(t, err)
-	require.Len(t, m.Metrics(), 4)
-
-	var expected, actual []string
-	for i, exp := range first5[1:] {
-		expected = append(expected, exp.String())
-		actual = append(actual, m.Metrics()[i].String())
-	}
-
-	sort.Strings(expected)
-	sort.Strings(actual)
-
-	assert.Equal(t, expected, actual)
-}
-
-// Test that multiple buffer overflows are handled properly.
-func TestRunningOutputMultiOverwrite(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	ro := NewRunningOutput("test", m, conf)
-	ro.MetricBufferLimit = 3
-
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	for _, metric := range next5 {
-		ro.AddMetric(metric)
-	}
-	require.Len(t, m.Metrics(), 0)
-
-	err := ro.Write()
-	require.NoError(t, err)
-	require.Len(t, m.Metrics(), 3)
-
-	var expected, actual []string
-	for i, exp := range next5[2:] {
-		expected = append(expected, exp.String())
-		actual = append(actual, m.Metrics()[i].String())
-	}
-
-	sort.Strings(expected)
-	sort.Strings(actual)
-
-	assert.Equal(t, expected, actual)
-}
-
-// Test that running output doesn't flush until it's full when
-// FlushBufferWhenFull is set.
-func TestRunningOutputFlushWhenFull(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	ro := NewRunningOutput("test", m, conf)
-	ro.FlushBufferWhenFull = true
-	ro.MetricBufferLimit = 5
-
-	// Fill buffer to limit
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	// no flush yet
-	assert.Len(t, m.Metrics(), 0)
-
-	// add one more metric
-	ro.AddMetric(next5[0])
-	// now it flushed
-	assert.Len(t, m.Metrics(), 6)
-
-	// add one more metric and write it manually
-	ro.AddMetric(next5[1])
-	err := ro.Write()
-	assert.NoError(t, err)
-	assert.Len(t, m.Metrics(), 7)
-}
-
-// Test that running output doesn't flush until it's full when
-// FlushBufferWhenFull is set, twice.
-func TestRunningOutputMultiFlushWhenFull(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	ro := NewRunningOutput("test", m, conf)
-	ro.FlushBufferWhenFull = true
-	ro.MetricBufferLimit = 4
-
-	// Fill buffer past limit twive
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	for _, metric := range next5 {
-		ro.AddMetric(metric)
-	}
-	// flushed twice
-	assert.Len(t, m.Metrics(), 10)
-}
-
-func TestRunningOutputWriteFail(t *testing.T) {
-	conf := &OutputConfig{
-		Filter: Filter{
-			IsActive: false,
-		},
-	}
-
-	m := &mockOutput{}
-	m.failWrite = true
-	ro := NewRunningOutput("test", m, conf)
-	ro.FlushBufferWhenFull = true
-	ro.MetricBufferLimit = 4
-
-	// Fill buffer past limit twice
-	for _, metric := range first5 {
-		ro.AddMetric(metric)
-	}
-	for _, metric := range next5 {
-		ro.AddMetric(metric)
-	}
-	// no successful flush yet
-	assert.Len(t, m.Metrics(), 0)
-
-	// manual write fails
-	err := ro.Write()
-	require.Error(t, err)
-	// no successful flush yet
-	assert.Len(t, m.Metrics(), 0)
-
-	m.failWrite = false
-	err = ro.Write()
-	require.NoError(t, err)
-
-	assert.Len(t, m.Metrics(), 10)
-}
-
-type mockOutput struct {
-	sync.Mutex
-
-	metrics []telegraf.Metric
-
-	// if true, mock a write failure
-	failWrite bool
-}
-
-func (m *mockOutput) Connect() error {
-	return nil
-}
-
-func (m *mockOutput) Close() error {
-	return nil
-}
-
-func (m *mockOutput) Description() string {
-	return ""
-}
-
-func (m *mockOutput) SampleConfig() string {
-	return ""
-}
-
-func (m *mockOutput) Write(metrics []telegraf.Metric) error {
-	m.Lock()
-	defer m.Unlock()
-	if m.failWrite {
-		return fmt.Errorf("Failed Write!")
-	}
-
-	if m.metrics == nil {
-		m.metrics = []telegraf.Metric{}
-	}
-
-	for _, metric := range metrics {
-		m.metrics = append(m.metrics, metric)
-	}
-	return nil
-}
-
-func (m *mockOutput) Metrics() []telegraf.Metric {
-	m.Lock()
-	defer m.Unlock()
-	return m.metrics
-}

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())
+}