feature(kubernetes plugin): Adds support for a kuberentes plugin

fixes #569
This commit also refactors the existing docker plugin so that the
kubernetes plugin can gather metrics from the docker system.

.gitignore

@@ -4,3 +4,4 @@ tivan
 .idea
 *~
 *#
+vendor/

Godeps

@@ -3,30 +3,28 @@ github.com/Shopify/sarama d37c73f2b2bce85f7fa16b6a550d26c5372892ef
 github.com/Sirupsen/logrus f7f79f729e0fbe2fcc061db48a9ba0263f588252
 github.com/amir/raidman 6a8e089bbe32e6b907feae5ba688841974b3c339
 github.com/armon/go-metrics 345426c77237ece5dab0e1605c3e4b35c3f54757
-github.com/aws/aws-sdk-go 87b1e60a50b09e4812dee560b33a238f67305804
+github.com/aws/aws-sdk-go 3ad0b07b44c22c21c734d1094981540b7a11e942
 github.com/beorn7/perks b965b613227fddccbfffe13eae360ed3fa822f8d
-github.com/boltdb/bolt ee4a0888a9abe7eefe5a0992ca4cb06864839873
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-github.com/dancannon/gorethink 6f088135ff288deb9d5546f4c71919207f891a70
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-github.com/fsouza/go-dockerclient 7b651349f9479f5114913eefbfd3c4eeddd79ab4
+github.com/fsouza/go-dockerclient 6fb38e6bb3d544d7eb5b55fd396cd4e6850802d8
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-github.com/go-sql-driver/mysql 7c7f556282622f94213bc028b4d0a7b6151ba239
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-github.com/gorilla/context 1c83b3eabd45b6d76072b66b746c20815fb2872d
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-github.com/gorilla/mux 26a6070f849969ba72b72256e9f14cf519751690
-github.com/hailocab/go-hostpool e80d13ce29ede4452c43dea11e79b9bc8a15b478
 github.com/hashicorp/go-msgpack fa3f63826f7c23912c15263591e65d54d080b458
-github.com/hashicorp/raft 057b893fd996696719e98b6c44649ea14968c811
+github.com/hashicorp/raft b95f335efee1992886864389183ebda0c0a5d0f6
 github.com/hashicorp/raft-boltdb d1e82c1ec3f15ee991f7cc7ffd5b67ff6f5bbaee
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-github.com/influxdata/influxdb 697f48b4e62e514e701ffec39978b864a3c666e6
+github.com/influxdata/influxdb 0e0f85a0c1fd1788ae4f9145531b02c539cfa5b5
-github.com/influxdb/influxdb 697f48b4e62e514e701ffec39978b864a3c666e6
+github.com/influxdb/influxdb 0e0f85a0c1fd1788ae4f9145531b02c539cfa5b5
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@@ -39,21 +37,21 @@ github.com/pborman/uuid dee7705ef7b324f27ceb85a121c61f2c2e8ce988
 github.com/pmezard/go-difflib 792786c7400a136282c1664665ae0a8db921c6c2
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-github.com/prometheus/common 14ca1097bbe21584194c15e391a9dab95ad42a59
+github.com/prometheus/common 0a3005bb37bc411040083a55372e77c405f6464c
 github.com/prometheus/procfs 406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8
 github.com/samuel/go-zookeeper 218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f
-github.com/shirou/gopsutil 85bf0974ed06e4e668595ae2b4de02e772a2819b
+github.com/shirou/gopsutil 8850f58d7035653e1ab90711481954c8ca1b9813
 github.com/soniah/gosnmp b1b4f885b12c5dcbd021c5cee1c904110de6db7d
 github.com/streadway/amqp b4f3ceab0337f013208d31348b578d83c0064744
 github.com/stretchr/objx 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
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 github.com/wvanbergen/kafka 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
 github.com/wvanbergen/kazoo-go 0f768712ae6f76454f987c3356177e138df258f8
-github.com/zensqlmonitor/go-mssqldb ffe5510c6fa5e15e6d983210ab501c815b56b363
+golang.org/x/crypto 3760e016850398b85094c4c99e955b8c3dea5711
-golang.org/x/crypto 1f22c0103821b9390939b6776727195525381532
+golang.org/x/net 72aa00c6241a8013dc9b040abb45f57edbe73945
-golang.org/x/net 04b9de9b512f58addf28c9853d50ebef61c3953e
+golang.org/x/text cf4986612c83df6c55578ba198316d1684a9a287
-golang.org/x/text 6d3c22c4525a4da167968fa2479be5524d2e8bd0
+gopkg.in/dancannon/gorethink.v1 e2cef022d0495329dfb0635991de76efcab5cf50
-gopkg.in/dancannon/gorethink.v1 6f088135ff288deb9d5546f4c71919207f891a70
 gopkg.in/fatih/pool.v2 cba550ebf9bce999a02e963296d4bc7a486cb715
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+github.com/jchauncey/kubeclient 52ad51a76eed34f58589952b20b4a1d5928cdcd2

glide.lock

@@ -0,0 +1,327 @@
+hash: 72cce248c61fcd2aeb705fdfc7651d6209652785233c51db759c026cb056c746
+updated: 2016-02-04T15:41:25.032836149-07:00
+imports:
+- name: git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git
+  version: dbd8d5c40a582eb9adacde36b47932b3a3ad0034
+  subpackages:
+  - packets
+- name: github.com/amir/raidman
+  version: 6a8e089bbe32e6b907feae5ba688841974b3c339
+  subpackages:
+  - proto
+- name: github.com/armon/go-metrics
+  version: 345426c77237ece5dab0e1605c3e4b35c3f54757
+- name: github.com/aws/aws-sdk-go
+  version: 3ad0b07b44c22c21c734d1094981540b7a11e942
+  subpackages:
+  - aws
+  - aws/credentials
+  - aws/credentials/ec2rolecreds
+  - aws/ec2metadata
+  - aws/session
+  - service/cloudwatch
+  - service/kinesis
+  - aws/awserr
+  - aws/client
+  - aws/client/metadata
+  - aws/request
+  - aws/corehandlers
+  - aws/defaults
+  - private/endpoints
+  - aws/awsutil
+  - private/protocol/query
+  - private/signer/v4
+  - private/protocol/jsonrpc
+  - private/waiter
+  - private/protocol/query/queryutil
+  - private/protocol/xml/xmlutil
+  - private/protocol/rest
+  - private/protocol/json/jsonutil
+- name: github.com/beorn7/perks
+  version: b965b613227fddccbfffe13eae360ed3fa822f8d
+  subpackages:
+  - quantile
+- name: github.com/boltdb/bolt
+  version: 6465994716bf6400605746e79224cf1e7ed68725
+- name: github.com/cenkalti/backoff
+  version: 4dc77674aceaabba2c7e3da25d4c823edfb73f99
+- name: github.com/dancannon/gorethink
+  version: ff457cac6a529d9749d841a733d76e8305cba3c8
+  subpackages:
+  - encoding
+  - ql2
+  - types
+- name: github.com/davecgh/go-spew
+  version: 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
+  subpackages:
+  - spew
+- name: github.com/eapache/go-resiliency
+  version: b86b1ec0dd4209a588dc1285cdd471e73525c0b3
+  subpackages:
+  - breaker
+- name: github.com/eapache/queue
+  version: ded5959c0d4e360646dc9e9908cff48666781367
+- name: github.com/emicklei/go-restful
+  version: abf32aacea4194d93badf851494b54a159daddd2
+  subpackages:
+  - swagger
+  - log
+- name: github.com/fsouza/go-dockerclient
+  version: 6fb38e6bb3d544d7eb5b55fd396cd4e6850802d8
+  subpackages:
+  - external/github.com/docker/docker/opts
+  - external/github.com/docker/docker/pkg/archive
+  - external/github.com/docker/docker/pkg/fileutils
+  - external/github.com/docker/docker/pkg/homedir
+  - external/github.com/docker/docker/pkg/stdcopy
+  - external/github.com/hashicorp/go-cleanhttp
+  - external/github.com/Sirupsen/logrus
+  - external/github.com/docker/docker/pkg/idtools
+  - external/github.com/docker/docker/pkg/ioutils
+  - external/github.com/docker/docker/pkg/pools
+  - external/github.com/docker/docker/pkg/promise
+  - external/github.com/docker/docker/pkg/system
+  - external/github.com/opencontainers/runc/libcontainer/user
+  - external/golang.org/x/net/context
+- name: github.com/ghodss/yaml
+  version: 73d445a93680fa1a78ae23a5839bad48f32ba1ee
+- name: github.com/go-ini/ini
+  version: afbd495e5aaea13597b5e14fe514ddeaa4d76fc3
+- name: github.com/go-sql-driver/mysql
+  version: 72ea5d0b32a04c67710bf63e97095d82aea5f352
+- name: github.com/gogo/protobuf
+  version: c57e439bad574c2e0877ff18d514badcfced004d
+  subpackages:
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+- name: github.com/golang/glog
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+- name: github.com/golang/protobuf
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+  - proto
+- name: github.com/golang/snappy
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+- name: github.com/gonuts/go-shellquote
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+- name: github.com/google/gofuzz
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+- name: github.com/gorilla/context
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+- name: github.com/gorilla/mux
+  version: 26a6070f849969ba72b72256e9f14cf519751690
+- name: github.com/hailocab/go-hostpool
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+- name: github.com/hashicorp/go-msgpack
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+  - codec
+- name: github.com/hashicorp/raft
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+- name: github.com/hashicorp/raft-boltdb
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+- name: github.com/influxdata/config
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+- name: github.com/influxdata/influxdb
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+  - models
+  - services/graphite
+- name: github.com/influxdb/influxdb
+  version: 0e0f85a0c1fd1788ae4f9145531b02c539cfa5b5
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+  - influxql
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+- name: github.com/jchauncey/kubeclient
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+  - version
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+  - apimachinery
+- name: github.com/jmespath/go-jmespath
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+- name: github.com/naoina/go-stringutil
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+- name: github.com/pborman/uuid
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+  - difflib
+- name: github.com/prometheus/client_golang
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+  - go
+- name: github.com/prometheus/common
+  version: 0a3005bb37bc411040083a55372e77c405f6464c
+  subpackages:
+  - expfmt
+  - model
+  - internal/bitbucket.org/ww/goautoneg
+- name: github.com/prometheus/procfs
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+- name: github.com/shirou/gopsutil
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+  subpackages:
+  - cpu
+  - disk
+  - host
+  - load
+  - mem
+  - net
+  - process
+  - internal/common
+- name: github.com/Shopify/sarama
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+- name: github.com/Sirupsen/logrus
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+- name: github.com/soniah/gosnmp
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+- name: github.com/spf13/pflag
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+- name: github.com/streadway/amqp
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+- name: github.com/stretchr/objx
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+- name: github.com/stretchr/testify
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+  subpackages:
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+  - mock
+  - http
+- name: github.com/ugorji/go
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+- name: github.com/wvanbergen/kafka
+  version: 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
+  subpackages:
+  - consumergroup
+- name: github.com/wvanbergen/kazoo-go
+  version: 0f768712ae6f76454f987c3356177e138df258f8
+- name: github.com/zensqlmonitor/go-mssqldb
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+- name: golang.org/x/crypto
+  version: 3760e016850398b85094c4c99e955b8c3dea5711
+  subpackages:
+  - md4
+  - bcrypt
+  - blowfish
+- name: golang.org/x/net
+  version: 72aa00c6241a8013dc9b040abb45f57edbe73945
+  subpackages:
+  - html/charset
+  - websocket
+  - context
+  - html
+  - html/atom
+- name: golang.org/x/text
+  version: cf4986612c83df6c55578ba198316d1684a9a287
+  subpackages:
+  - encoding
+  - encoding/charmap
+  - encoding/htmlindex
+  - transform
+  - encoding/internal/identifier
+  - encoding/internal
+  - encoding/japanese
+  - encoding/korean
+  - encoding/simplifiedchinese
+  - encoding/traditionalchinese
+  - encoding/unicode
+  - language
+  - internal/utf8internal
+  - runes
+  - internal/tag
+- name: gopkg.in/dancannon/gorethink.v1
+  version: e2cef022d0495329dfb0635991de76efcab5cf50
+- name: gopkg.in/fatih/pool.v2
+  version: cba550ebf9bce999a02e963296d4bc7a486cb715
+- name: gopkg.in/mgo.v2
+  version: 03c9f3ee4c14c8e51ee521a6a7d0425658dd6f64
+  subpackages:
+  - bson
+  - internal/scram
+- name: gopkg.in/yaml.v2
+  version: f7716cbe52baa25d2e9b0d0da546fcf909fc16b4
+- name: speter.net/go/exp/math/dec/inf
+  version: 42ca6cd68aa922bc3f32f1e056e61b65945d9ad7
+devImports: []

glide.yaml

@@ -0,0 +1,157 @@
+package: github.com/influxdata/telegraf
+import:
+- package: git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.golang.git
+  version: dbd8d5c40a582eb9adacde36b47932b3a3ad0034
+- package: github.com/Shopify/sarama
+  version: d37c73f2b2bce85f7fa16b6a550d26c5372892ef
+- package: github.com/Sirupsen/logrus
+  version: f7f79f729e0fbe2fcc061db48a9ba0263f588252
+- package: github.com/amir/raidman
+  version: 6a8e089bbe32e6b907feae5ba688841974b3c339
+- package: github.com/armon/go-metrics
+  version: 345426c77237ece5dab0e1605c3e4b35c3f54757
+- package: github.com/aws/aws-sdk-go
+  version: 3ad0b07b44c22c21c734d1094981540b7a11e942
+  subpackages:
+  - aws
+  - aws/credentials
+  - aws/credentials/ec2rolecreds
+  - aws/ec2metadata
+  - aws/session
+  - service/cloudwatch
+  - service/kinesis
+- package: github.com/beorn7/perks
+  version: b965b613227fddccbfffe13eae360ed3fa822f8d
+- package: github.com/boltdb/bolt
+  version: 6465994716bf6400605746e79224cf1e7ed68725
+- package: github.com/cenkalti/backoff
+  version: 4dc77674aceaabba2c7e3da25d4c823edfb73f99
+- package: github.com/dancannon/gorethink
+  version: ff457cac6a529d9749d841a733d76e8305cba3c8
+- package: github.com/davecgh/go-spew
+  version: 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
+- package: github.com/eapache/go-resiliency
+  version: b86b1ec0dd4209a588dc1285cdd471e73525c0b3
+- package: github.com/eapache/queue
+  version: ded5959c0d4e360646dc9e9908cff48666781367
+- package: github.com/fsouza/go-dockerclient
+  version: 6fb38e6bb3d544d7eb5b55fd396cd4e6850802d8
+- package: github.com/go-ini/ini
+  version: afbd495e5aaea13597b5e14fe514ddeaa4d76fc3
+- package: github.com/go-sql-driver/mysql
+  version: 72ea5d0b32a04c67710bf63e97095d82aea5f352
+- package: github.com/gogo/protobuf
+  version: c57e439bad574c2e0877ff18d514badcfced004d
+- package: github.com/golang/protobuf
+  version: 2402d76f3d41f928c7902a765dfc872356dd3aad
+- package: github.com/golang/snappy
+  version: 723cc1e459b8eea2dea4583200fd60757d40097a
+- package: github.com/gonuts/go-shellquote
+  version: e842a11b24c6abfb3dd27af69a17f482e4b483c2
+- package: github.com/hailocab/go-hostpool
+  version: 50839ee41f32bfca8d03a183031aa634b2dc1c64
+- package: github.com/hashicorp/go-msgpack
+  version: fa3f63826f7c23912c15263591e65d54d080b458
+- package: github.com/hashicorp/raft
+  version: b95f335efee1992886864389183ebda0c0a5d0f6
+- package: github.com/hashicorp/raft-boltdb
+  version: d1e82c1ec3f15ee991f7cc7ffd5b67ff6f5bbaee
+- package: github.com/influxdata/config
+  version: bae7cb98197d842374d3b8403905924094930f24
+- package: github.com/influxdata/influxdb
+  version: 0e0f85a0c1fd1788ae4f9145531b02c539cfa5b5
+  subpackages:
+  - client/v2
+  - models
+  - services/graphite
+- package: github.com/influxdb/influxdb
+  version: 0e0f85a0c1fd1788ae4f9145531b02c539cfa5b5
+- package: github.com/jmespath/go-jmespath
+  version: c01cf91b011868172fdcd9f41838e80c9d716264
+- package: github.com/klauspost/crc32
+  version: 999f3125931f6557b991b2f8472172bdfa578d38
+- package: github.com/lib/pq
+  version: 8ad2b298cadd691a77015666a5372eae5dbfac8f
+- package: github.com/matttproud/golang_protobuf_extensions
+  version: d0c3fe89de86839aecf2e0579c40ba3bb336a453
+- package: github.com/mreiferson/go-snappystream
+  version: 028eae7ab5c4c9e2d1cb4c4ca1e53259bbe7e504
+- package: github.com/naoina/go-stringutil
+  version: 6b638e95a32d0c1131db0e7fe83775cbea4a0d0b
+- package: github.com/naoina/toml
+  version: 751171607256bb66e64c9f0220c00662420c38e9
+  subpackages:
+  - ast
+- package: github.com/nsqio/go-nsq
+  version: 2118015c120962edc5d03325c680daf3163a8b5f
+- package: github.com/pborman/uuid
+  version: dee7705ef7b324f27ceb85a121c61f2c2e8ce988
+- package: github.com/pmezard/go-difflib
+  version: 792786c7400a136282c1664665ae0a8db921c6c2
+- package: github.com/prometheus/client_golang
+  version: 67994f177195311c3ea3d4407ed0175e34a4256f
+  subpackages:
+  - prometheus
+- package: github.com/prometheus/client_model
+  version: fa8ad6fec33561be4280a8f0514318c79d7f6cb6
+- package: github.com/prometheus/common
+  version: 0a3005bb37bc411040083a55372e77c405f6464c
+  subpackages:
+  - expfmt
+  - model
+- package: github.com/prometheus/procfs
+  version: 406e5b7bfd8201a36e2bb5f7bdae0b03380c2ce8
+- package: github.com/samuel/go-zookeeper
+  version: 218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f
+- package: github.com/shirou/gopsutil
+  version: 8850f58d7035653e1ab90711481954c8ca1b9813
+  subpackages:
+  - cpu
+  - disk
+  - host
+  - load
+  - mem
+  - net
+  - process
+- package: github.com/soniah/gosnmp
+  version: b1b4f885b12c5dcbd021c5cee1c904110de6db7d
+- package: github.com/streadway/amqp
+  version: b4f3ceab0337f013208d31348b578d83c0064744
+- package: github.com/stretchr/objx
+  version: 1a9d0bb9f541897e62256577b352fdbc1fb4fd94
+- package: github.com/stretchr/testify
+  version: f390dcf405f7b83c997eac1b06768bb9f44dec18
+  subpackages:
+  - assert
+  - mock
+- package: github.com/wvanbergen/kafka
+  version: 1a8639a45164fcc245d5c7b4bd3ccfbd1a0ffbf3
+  subpackages:
+  - consumergroup
+- package: github.com/wvanbergen/kazoo-go
+  version: 0f768712ae6f76454f987c3356177e138df258f8
+- package: golang.org/x/crypto
+  version: 3760e016850398b85094c4c99e955b8c3dea5711
+- package: golang.org/x/net
+  version: 72aa00c6241a8013dc9b040abb45f57edbe73945
+  subpackages:
+  - html/charset
+- package: golang.org/x/text
+  version: cf4986612c83df6c55578ba198316d1684a9a287
+- package: gopkg.in/dancannon/gorethink.v1
+  version: e2cef022d0495329dfb0635991de76efcab5cf50
+- package: gopkg.in/fatih/pool.v2
+  version: cba550ebf9bce999a02e963296d4bc7a486cb715
+- package: gopkg.in/mgo.v2
+  version: 03c9f3ee4c14c8e51ee521a6a7d0425658dd6f64
+  subpackages:
+  - bson
+- package: gopkg.in/yaml.v2
+  version: f7716cbe52baa25d2e9b0d0da546fcf909fc16b4
+- package: github.com/jchauncey/kubeclient
+  version: 52ad51a76eed34f58589952b20b4a1d5928cdcd2
+  subpackages:
+  - api
+  - client/unversioned
+- package: github.com/gorilla/mux
+- package: github.com/zensqlmonitor/go-mssqldb

internal/docker/docker.go

@@ -0,0 +1,301 @@
+package docker
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/influxdata/telegraf"
+
+	api "k8s.io/kubernetes/pkg/api"
+	kube "k8s.io/kubernetes/pkg/client/unversioned"
+
+	godocker "github.com/fsouza/go-dockerclient"
+)
+
+// CreateClient sets the client value in the Docker struct
+func CreateClient(endpoint string) (*godocker.Client, error) {
+	var c *godocker.Client
+	var err error
+	if endpoint == "ENV" {
+		c, err = godocker.NewClientFromEnv()
+	} else if endpoint == "" {
+		c, err = godocker.NewClient("unix:///var/run/docker.sock")
+	} else {
+		c, err = godocker.NewClient(endpoint)
+	}
+	return c, err
+}
+
+func GatherContainerMetrics(client *godocker.Client, kubeClient *kube.Client, containerNames []string, acc telegraf.Accumulator) error {
+	opts := godocker.ListContainersOptions{}
+	containers, err := client.ListContainers(opts)
+	if err != nil {
+		return err
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(len(containers))
+	for _, container := range containers {
+		go func(c godocker.APIContainers) {
+			defer wg.Done()
+			err := gatherContainer(client, kubeClient, c, containerNames, acc)
+			if err != nil {
+				fmt.Println(err.Error())
+			}
+		}(container)
+	}
+	wg.Wait()
+	return nil
+}
+
+func gatherContainer(
+	client *godocker.Client,
+	kubeClient *kube.Client,
+	container godocker.APIContainers,
+	containerNames []string,
+	acc telegraf.Accumulator,
+) error {
+	// Parse container name
+	cname := "unknown"
+	if len(container.Names) > 0 {
+		// Not sure what to do with other names, just take the first.
+		cname = strings.TrimPrefix(container.Names[0], "/")
+	}
+
+	tags := map[string]string{
+		"container_id":    container.ID,
+		"container_name":  cname,
+		"container_image": container.Image,
+	}
+
+	if kubeClient != nil {
+		tags = gatherKubernetesLabels(kubeClient, container.ID, tags)
+	}
+
+	if len(containerNames) > 0 {
+		if !sliceContains(cname, containerNames) {
+			return nil
+		}
+	}
+
+	statChan := make(chan *godocker.Stats)
+	done := make(chan bool)
+	statOpts := godocker.StatsOptions{
+		Stream:  false,
+		ID:      container.ID,
+		Stats:   statChan,
+		Done:    done,
+		Timeout: time.Duration(time.Second * 5),
+	}
+
+	go func() {
+		client.Stats(statOpts)
+	}()
+
+	stat := <-statChan
+	close(done)
+
+	// Add labels to tags
+	for k, v := range container.Labels {
+		tags[k] = v
+	}
+
+	gatherContainerStats(stat, acc, tags)
+
+	return nil
+}
+
+func gatherContainerStats(
+	stat *godocker.Stats,
+	acc telegraf.Accumulator,
+	tags map[string]string,
+) {
+	now := stat.Read
+
+	memfields := map[string]interface{}{
+		"max_usage":                 stat.MemoryStats.MaxUsage,
+		"usage":                     stat.MemoryStats.Usage,
+		"fail_count":                stat.MemoryStats.Failcnt,
+		"limit":                     stat.MemoryStats.Limit,
+		"total_pgmafault":           stat.MemoryStats.Stats.TotalPgmafault,
+		"cache":                     stat.MemoryStats.Stats.Cache,
+		"mapped_file":               stat.MemoryStats.Stats.MappedFile,
+		"total_inactive_file":       stat.MemoryStats.Stats.TotalInactiveFile,
+		"pgpgout":                   stat.MemoryStats.Stats.Pgpgout,
+		"rss":                       stat.MemoryStats.Stats.Rss,
+		"total_mapped_file":         stat.MemoryStats.Stats.TotalMappedFile,
+		"writeback":                 stat.MemoryStats.Stats.Writeback,
+		"unevictable":               stat.MemoryStats.Stats.Unevictable,
+		"pgpgin":                    stat.MemoryStats.Stats.Pgpgin,
+		"total_unevictable":         stat.MemoryStats.Stats.TotalUnevictable,
+		"pgmajfault":                stat.MemoryStats.Stats.Pgmajfault,
+		"total_rss":                 stat.MemoryStats.Stats.TotalRss,
+		"total_rss_huge":            stat.MemoryStats.Stats.TotalRssHuge,
+		"total_writeback":           stat.MemoryStats.Stats.TotalWriteback,
+		"total_inactive_anon":       stat.MemoryStats.Stats.TotalInactiveAnon,
+		"rss_huge":                  stat.MemoryStats.Stats.RssHuge,
+		"hierarchical_memory_limit": stat.MemoryStats.Stats.HierarchicalMemoryLimit,
+		"total_pgfault":             stat.MemoryStats.Stats.TotalPgfault,
+		"total_active_file":         stat.MemoryStats.Stats.TotalActiveFile,
+		"active_anon":               stat.MemoryStats.Stats.ActiveAnon,
+		"total_active_anon":         stat.MemoryStats.Stats.TotalActiveAnon,
+		"total_pgpgout":             stat.MemoryStats.Stats.TotalPgpgout,
+		"total_cache":               stat.MemoryStats.Stats.TotalCache,
+		"inactive_anon":             stat.MemoryStats.Stats.InactiveAnon,
+		"active_file":               stat.MemoryStats.Stats.ActiveFile,
+		"pgfault":                   stat.MemoryStats.Stats.Pgfault,
+		"inactive_file":             stat.MemoryStats.Stats.InactiveFile,
+		"total_pgpgin":              stat.MemoryStats.Stats.TotalPgpgin,
+	}
+	acc.AddFields("docker_mem", memfields, tags, now)
+
+	cpufields := map[string]interface{}{
+		"usage_total":                  stat.CPUStats.CPUUsage.TotalUsage,
+		"usage_in_usermode":            stat.CPUStats.CPUUsage.UsageInUsermode,
+		"usage_in_kernelmode":          stat.CPUStats.CPUUsage.UsageInKernelmode,
+		"usage_system":                 stat.CPUStats.SystemCPUUsage,
+		"throttling_periods":           stat.CPUStats.ThrottlingData.Periods,
+		"throttling_throttled_periods": stat.CPUStats.ThrottlingData.ThrottledPeriods,
+		"throttling_throttled_time":    stat.CPUStats.ThrottlingData.ThrottledTime,
+	}
+	cputags := copyTags(tags)
+	cputags["cpu"] = "cpu-total"
+	acc.AddFields("docker_cpu", cpufields, cputags, now)
+
+	for i, percpu := range stat.CPUStats.CPUUsage.PercpuUsage {
+		percputags := copyTags(tags)
+		percputags["cpu"] = fmt.Sprintf("cpu%d", i)
+		acc.AddFields("docker_cpu", map[string]interface{}{"usage_total": percpu}, percputags, now)
+	}
+
+	for network, netstats := range stat.Networks {
+		netfields := map[string]interface{}{
+			"rx_dropped": netstats.RxDropped,
+			"rx_bytes":   netstats.RxBytes,
+			"rx_errors":  netstats.RxErrors,
+			"tx_packets": netstats.TxPackets,
+			"tx_dropped": netstats.TxDropped,
+			"rx_packets": netstats.RxPackets,
+			"tx_errors":  netstats.TxErrors,
+			"tx_bytes":   netstats.TxBytes,
+		}
+		// Create a new network tag dictionary for the "network" tag
+		nettags := copyTags(tags)
+		nettags["network"] = network
+		acc.AddFields("docker_net", netfields, nettags, now)
+	}
+
+	gatherBlockIOMetrics(stat, acc, tags, now)
+}
+
+func gatherBlockIOMetrics(
+	stat *godocker.Stats,
+	acc telegraf.Accumulator,
+	tags map[string]string,
+	now time.Time,
+) {
+	blkioStats := stat.BlkioStats
+	// Make a map of devices to their block io stats
+	deviceStatMap := make(map[string]map[string]interface{})
+
+	for _, metric := range blkioStats.IOServiceBytesRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		_, ok := deviceStatMap[device]
+		if !ok {
+			deviceStatMap[device] = make(map[string]interface{})
+		}
+
+		field := fmt.Sprintf("io_service_bytes_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOServicedRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		_, ok := deviceStatMap[device]
+		if !ok {
+			deviceStatMap[device] = make(map[string]interface{})
+		}
+
+		field := fmt.Sprintf("io_serviced_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOQueueRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("io_queue_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOServiceTimeRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("io_service_time_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOWaitTimeRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("io_wait_time_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOMergedRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("io_merged_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.IOTimeRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("io_time_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for _, metric := range blkioStats.SectorsRecursive {
+		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
+		field := fmt.Sprintf("sectors_recursive_%s", strings.ToLower(metric.Op))
+		deviceStatMap[device][field] = metric.Value
+	}
+
+	for device, fields := range deviceStatMap {
+		iotags := copyTags(tags)
+		iotags["device"] = device
+		acc.AddFields("docker_blkio", fields, iotags, now)
+	}
+}
+
+func copyTags(in map[string]string) map[string]string {
+	out := make(map[string]string)
+	for k, v := range in {
+		out[k] = v
+	}
+	return out
+}
+
+func gatherKubernetesLabels(kubeClient *kube.Client, containerID string, tags map[string]string) map[string]string {
+	podClient := kubeClient.Pods(api.NamespaceAll)
+	pods, _ := podClient.List(api.ListOptions{})
+
+	for _, pod := range pods.Items {
+		for _, containerStatus := range pod.Status.ContainerStatuses {
+			podContainerID := strings.TrimPrefix(containerStatus.ContainerID, "docker://")
+			if podContainerID == containerID {
+				for k, v := range pod.ObjectMeta.Labels {
+					tags[k] = v
+				}
+				return tags
+			}
+		}
+	}
+	return tags
+}
+
+func sliceContains(in string, sl []string) bool {
+	for _, str := range sl {
+		if str == in {
+			return true
+		}
+	}
+	return false
+}

internal/docker/docker_test.go

@@ -1,4 +1,4 @@
-package system
+package docker
 
 import (
 	"testing"

plugins/inputs/all/all.go

@@ -14,6 +14,7 @@ import (
 	_ "github.com/influxdata/telegraf/plugins/inputs/influxdb"
 	_ "github.com/influxdata/telegraf/plugins/inputs/jolokia"
 	_ "github.com/influxdata/telegraf/plugins/inputs/kafka_consumer"
+	_ "github.com/influxdata/telegraf/plugins/inputs/kubernetes"
 	_ "github.com/influxdata/telegraf/plugins/inputs/leofs"
 	_ "github.com/influxdata/telegraf/plugins/inputs/lustre2"
 	_ "github.com/influxdata/telegraf/plugins/inputs/mailchimp"

plugins/inputs/docker/README.md

@@ -98,9 +98,9 @@ on the availability of per-cpu stats on your system.
 ### Tags:
 
 - All stats have the following tags:
-    - cont_id (container ID)
+    - container_id (container ID)
-    - cont_image (container image)
+    - container_image (container image)
-    - cont_name (container name)
+    - container_name (container name)
 - docker_cpu specific:
     - cpu
 - docker_net specific:

plugins/inputs/docker/docker.go

@@ -1,23 +1,17 @@
 package system
 
 import (
-	"fmt"
-	"log"
-	"strings"
-	"sync"
-	"time"
-
 	"github.com/influxdata/telegraf"
+	docker "github.com/influxdata/telegraf/internal/docker"
 	"github.com/influxdata/telegraf/plugins/inputs"
 
-	"github.com/fsouza/go-dockerclient"
+	godocker "github.com/fsouza/go-dockerclient"
 )
 
 type Docker struct {
 	Endpoint       string
 	ContainerNames []string
-
+	client         *godocker.Client
-	client *docker.Client
 }
 
 var sampleConfig = `
@@ -36,279 +30,17 @@ func (d *Docker) Description() string {
 func (d *Docker) SampleConfig() string { return sampleConfig }
 
 func (d *Docker) Gather(acc telegraf.Accumulator) error {
-	if d.client == nil {
+	var err error
-		var c *docker.Client
-		var err error
-		if d.Endpoint == "ENV" {
-			c, err = docker.NewClientFromEnv()
-			if err != nil {
-				return err
-			}
-		} else if d.Endpoint == "" {
-			c, err = docker.NewClient("unix:///var/run/docker.sock")
-			if err != nil {
-				return err
-			}
-		} else {
-			c, err = docker.NewClient(d.Endpoint)
-			if err != nil {
-				return err
-			}
-		}
-		d.client = c
-	}
 
-	opts := docker.ListContainersOptions{}
+	d.client, err = docker.CreateClient(d.Endpoint)
-	containers, err := d.client.ListContainers(opts)
 	if err != nil {
 		return err
 	}
 
-	var wg sync.WaitGroup
+	if d.client != nil {
-	wg.Add(len(containers))
+		err = docker.GatherContainerMetrics(d.client, nil, d.ContainerNames, acc)
-	for _, container := range containers {
-		go func(c docker.APIContainers) {
-			defer wg.Done()
-			err := d.gatherContainer(c, acc)
-			if err != nil {
-				fmt.Println(err.Error())
-			}
-		}(container)
 	}
-	wg.Wait()
+	return err
-
-	return nil
-}
-
-func (d *Docker) gatherContainer(
-	container docker.APIContainers,
-	acc telegraf.Accumulator,
-) error {
-	// Parse container name
-	cname := "unknown"
-	if len(container.Names) > 0 {
-		// Not sure what to do with other names, just take the first.
-		cname = strings.TrimPrefix(container.Names[0], "/")
-	}
-
-	tags := map[string]string{
-		"cont_id":    container.ID,
-		"cont_name":  cname,
-		"cont_image": container.Image,
-	}
-	if len(d.ContainerNames) > 0 {
-		if !sliceContains(cname, d.ContainerNames) {
-			return nil
-		}
-	}
-
-	statChan := make(chan *docker.Stats)
-	done := make(chan bool)
-	statOpts := docker.StatsOptions{
-		Stream:  false,
-		ID:      container.ID,
-		Stats:   statChan,
-		Done:    done,
-		Timeout: time.Duration(time.Second * 5),
-	}
-
-	go func() {
-		err := d.client.Stats(statOpts)
-		if err != nil {
-			log.Printf("Error getting docker stats: %s\n", err.Error())
-		}
-	}()
-
-	stat := <-statChan
-	close(done)
-
-	if stat == nil {
-		return nil
-	}
-
-	// Add labels to tags
-	for k, v := range container.Labels {
-		tags[k] = v
-	}
-
-	gatherContainerStats(stat, acc, tags)
-
-	return nil
-}
-
-func gatherContainerStats(
-	stat *docker.Stats,
-	acc telegraf.Accumulator,
-	tags map[string]string,
-) {
-	now := stat.Read
-
-	memfields := map[string]interface{}{
-		"max_usage":                 stat.MemoryStats.MaxUsage,
-		"usage":                     stat.MemoryStats.Usage,
-		"fail_count":                stat.MemoryStats.Failcnt,
-		"limit":                     stat.MemoryStats.Limit,
-		"total_pgmafault":           stat.MemoryStats.Stats.TotalPgmafault,
-		"cache":                     stat.MemoryStats.Stats.Cache,
-		"mapped_file":               stat.MemoryStats.Stats.MappedFile,
-		"total_inactive_file":       stat.MemoryStats.Stats.TotalInactiveFile,
-		"pgpgout":                   stat.MemoryStats.Stats.Pgpgout,
-		"rss":                       stat.MemoryStats.Stats.Rss,
-		"total_mapped_file":         stat.MemoryStats.Stats.TotalMappedFile,
-		"writeback":                 stat.MemoryStats.Stats.Writeback,
-		"unevictable":               stat.MemoryStats.Stats.Unevictable,
-		"pgpgin":                    stat.MemoryStats.Stats.Pgpgin,
-		"total_unevictable":         stat.MemoryStats.Stats.TotalUnevictable,
-		"pgmajfault":                stat.MemoryStats.Stats.Pgmajfault,
-		"total_rss":                 stat.MemoryStats.Stats.TotalRss,
-		"total_rss_huge":            stat.MemoryStats.Stats.TotalRssHuge,
-		"total_writeback":           stat.MemoryStats.Stats.TotalWriteback,
-		"total_inactive_anon":       stat.MemoryStats.Stats.TotalInactiveAnon,
-		"rss_huge":                  stat.MemoryStats.Stats.RssHuge,
-		"hierarchical_memory_limit": stat.MemoryStats.Stats.HierarchicalMemoryLimit,
-		"total_pgfault":             stat.MemoryStats.Stats.TotalPgfault,
-		"total_active_file":         stat.MemoryStats.Stats.TotalActiveFile,
-		"active_anon":               stat.MemoryStats.Stats.ActiveAnon,
-		"total_active_anon":         stat.MemoryStats.Stats.TotalActiveAnon,
-		"total_pgpgout":             stat.MemoryStats.Stats.TotalPgpgout,
-		"total_cache":               stat.MemoryStats.Stats.TotalCache,
-		"inactive_anon":             stat.MemoryStats.Stats.InactiveAnon,
-		"active_file":               stat.MemoryStats.Stats.ActiveFile,
-		"pgfault":                   stat.MemoryStats.Stats.Pgfault,
-		"inactive_file":             stat.MemoryStats.Stats.InactiveFile,
-		"total_pgpgin":              stat.MemoryStats.Stats.TotalPgpgin,
-	}
-	acc.AddFields("docker_mem", memfields, tags, now)
-
-	cpufields := map[string]interface{}{
-		"usage_total":                  stat.CPUStats.CPUUsage.TotalUsage,
-		"usage_in_usermode":            stat.CPUStats.CPUUsage.UsageInUsermode,
-		"usage_in_kernelmode":          stat.CPUStats.CPUUsage.UsageInKernelmode,
-		"usage_system":                 stat.CPUStats.SystemCPUUsage,
-		"throttling_periods":           stat.CPUStats.ThrottlingData.Periods,
-		"throttling_throttled_periods": stat.CPUStats.ThrottlingData.ThrottledPeriods,
-		"throttling_throttled_time":    stat.CPUStats.ThrottlingData.ThrottledTime,
-	}
-	cputags := copyTags(tags)
-	cputags["cpu"] = "cpu-total"
-	acc.AddFields("docker_cpu", cpufields, cputags, now)
-
-	for i, percpu := range stat.CPUStats.CPUUsage.PercpuUsage {
-		percputags := copyTags(tags)
-		percputags["cpu"] = fmt.Sprintf("cpu%d", i)
-		acc.AddFields("docker_cpu", map[string]interface{}{"usage_total": percpu}, percputags, now)
-	}
-
-	for network, netstats := range stat.Networks {
-		netfields := map[string]interface{}{
-			"rx_dropped": netstats.RxDropped,
-			"rx_bytes":   netstats.RxBytes,
-			"rx_errors":  netstats.RxErrors,
-			"tx_packets": netstats.TxPackets,
-			"tx_dropped": netstats.TxDropped,
-			"rx_packets": netstats.RxPackets,
-			"tx_errors":  netstats.TxErrors,
-			"tx_bytes":   netstats.TxBytes,
-		}
-		// Create a new network tag dictionary for the "network" tag
-		nettags := copyTags(tags)
-		nettags["network"] = network
-		acc.AddFields("docker_net", netfields, nettags, now)
-	}
-
-	gatherBlockIOMetrics(stat, acc, tags, now)
-}
-
-func gatherBlockIOMetrics(
-	stat *docker.Stats,
-	acc telegraf.Accumulator,
-	tags map[string]string,
-	now time.Time,
-) {
-	blkioStats := stat.BlkioStats
-	// Make a map of devices to their block io stats
-	deviceStatMap := make(map[string]map[string]interface{})
-
-	for _, metric := range blkioStats.IOServiceBytesRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		_, ok := deviceStatMap[device]
-		if !ok {
-			deviceStatMap[device] = make(map[string]interface{})
-		}
-
-		field := fmt.Sprintf("io_service_bytes_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOServicedRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		_, ok := deviceStatMap[device]
-		if !ok {
-			deviceStatMap[device] = make(map[string]interface{})
-		}
-
-		field := fmt.Sprintf("io_serviced_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOQueueRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("io_queue_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOServiceTimeRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("io_service_time_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOWaitTimeRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("io_wait_time_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOMergedRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("io_merged_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.IOTimeRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("io_time_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for _, metric := range blkioStats.SectorsRecursive {
-		device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
-		field := fmt.Sprintf("sectors_recursive_%s", strings.ToLower(metric.Op))
-		deviceStatMap[device][field] = metric.Value
-	}
-
-	for device, fields := range deviceStatMap {
-		iotags := copyTags(tags)
-		iotags["device"] = device
-		acc.AddFields("docker_blkio", fields, iotags, now)
-	}
-}
-
-func copyTags(in map[string]string) map[string]string {
-	out := make(map[string]string)
-	for k, v := range in {
-		out[k] = v
-	}
-	return out
-}
-
-func sliceContains(in string, sl []string) bool {
-	for _, str := range sl {
-		if str == in {
-			return true
-		}
-	}
-	return false
 }
 
 func init() {

plugins/inputs/kubernetes/README.md

@@ -0,0 +1,30 @@
+# Kubernetes Input Plugin
+The kubernetes plugin uses the docker remote API to gather metrics on running
+docker containers. You can read Docker's documentation for their remote API
+[here](https://docs.docker.com/engine/reference/api/docker_remote_api_v1.20/#get-container-stats-based-on-resource-usage)
+
+It then decorates those metrics with the kubernetes labels (and docker labels).
+
+The kubernetes plugin uses the excellent
+[fsouza go-dockerclient](https://github.com/fsouza/go-dockerclient) library to
+gather stats. Documentation for the library can be found
+[here](https://godoc.org/github.com/fsouza/go-dockerclient) and documentation
+for the stat structure can be found
+[here](https://godoc.org/github.com/fsouza/go-dockerclient#Stats)
+
+### Configuration:
+
+```
+# Read metrics about docker containers
+[[inputs.kubernetes]]
+  # Docker Endpoint
+  #   To use TCP, set endpoint = "tcp://[ip]:[port]"
+  #   To use environment variables (ie, docker-machine), set endpoint = "ENV"
+  endpoint = "unix:///var/run/docker.sock"
+  # Only collect metrics for these containers, collect all if empty
+  container_names = []
+```
+
+### Measurements & Fields:
+
+Please see the [docker input plugin](../docker/README.md) for detailed list of measurements.

plugins/inputs/kubernetes/kubernetes.go

@@ -0,0 +1,59 @@
+package system
+
+import (
+	kube "k8s.io/kubernetes/pkg/client/unversioned"
+
+	godocker "github.com/fsouza/go-dockerclient"
+
+	"github.com/influxdata/telegraf"
+	docker "github.com/influxdata/telegraf/internal/docker"
+	"github.com/influxdata/telegraf/plugins/inputs"
+)
+
+type Kubernetes struct {
+	DockerEndpoint   string
+	ContainerNames   []string
+	DockerClient     *godocker.Client
+	KubernetesClient *kube.Client
+}
+
+var sampleConfig = `
+  # Docker Endpoint
+  #   To use TCP, set docker_endpoint = "tcp://[ip]:[port]"
+  #   To use environment variables (ie, docker-machine), set docker_endpoint = "ENV"
+  docker_endpoint = "unix:///var/run/docker.sock"
+  # Only collect metrics for these containers, collect all if empty
+  container_names = []
+`
+
+func (k *Kubernetes) Description() string {
+	return "Read metrics about docker containers running on a kubernetes cluster"
+}
+
+func (k *Kubernetes) SampleConfig() string { return sampleConfig }
+
+func (k *Kubernetes) Gather(acc telegraf.Accumulator) error {
+	var err error
+
+	k.KubernetesClient, err = kube.NewInCluster()
+	if err != nil {
+		return err
+	}
+
+	k.DockerClient, err = docker.CreateClient(k.DockerEndpoint)
+	if err != nil {
+		return err
+	}
+
+	if k.DockerClient != nil {
+		err = docker.GatherContainerMetrics(k.DockerClient, k.KubernetesClient, k.ContainerNames, acc)
+	}
+
+	return err
+}
+
+func init() {
+	inputs.Add("kubernetes", func() telegraf.Input {
+		return &Kubernetes{}
+	})
+}