Add SNMP receiver

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/PaesslerAG/gval v1.2.2
 	github.com/fsnotify/fsnotify v1.6.0
 	github.com/gorilla/mux v1.8.0
+	github.com/gosnmp/gosnmp v1.37.0
 	github.com/influxdata/influxdb-client-go/v2 v2.12.3
 	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
 	github.com/influxdata/line-protocol/v2 v2.2.1

go.sum

@@ -8,6 +8,7 @@ github.com/ClusterCockpit/cc-units v0.4.0 h1:zP5DOu99GmErW0tCDf0gcLrlWt42RQ9dpoO
 github.com/ClusterCockpit/cc-units v0.4.0/go.mod h1:3S3PAhAayS3pbgcT4q9Vn9VJw22Op51X0YimtG77zBw=
 github.com/ClusterCockpit/go-rocm-smi v0.3.0 h1:1qZnSpG7/NyLtc7AjqnUL9Jb8xtqG1nMVgp69rJfaR8=
 github.com/ClusterCockpit/go-rocm-smi v0.3.0/go.mod h1:+I3UMeX3OlizXDf1WpGD43W4KGZZGVSGmny6rTeOnWA=
+github.com/Joker/hpp v1.0.0 h1:65+iuJYdRXv/XyN62C1uEmmOx3432rNG/rKlX6V7Kkc=
 github.com/Joker/hpp v1.0.0/go.mod h1:8x5n+M1Hp5hC0g8okX3sR3vFQwynaX/UgSOM9MeBKzY=
 github.com/Joker/jade v1.1.3 h1:Qbeh12Vq6BxURXT1qZBRHsDxeURB8ztcL6f3EXSGeHk=
 github.com/Joker/jade v1.1.3/go.mod h1:T+2WLyt7VH6Lp0TRxQrUYEs64nRc83wkMQrfeIQKduM=
@@ -16,10 +17,12 @@ github.com/NVIDIA/go-nvml v0.12.0-1 h1:6mdjtlFo+17dWL7VFPfuRMtf0061TF4DKls9pkSw6
 github.com/NVIDIA/go-nvml v0.12.0-1/go.mod h1:hy7HYeQy335x6nEss0Ne3PYqleRa6Ct+VKD9RQ4nyFs=
 github.com/PaesslerAG/gval v1.2.2 h1:Y7iBzhgE09IGTt5QgGQ2IdaYYYOU134YGHBThD+wm9E=
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+github.com/PaesslerAG/jsonpath v0.1.0 h1:gADYeifvlqK3R3i2cR5B4DGgxLXIPb3TRTH1mGi0jPI=
 github.com/PaesslerAG/jsonpath v0.1.0/go.mod h1:4BzmtoM/PI8fPO4aQGIusjGxGir2BzcV0grWtFzq1Y8=
 github.com/RaveNoX/go-jsoncommentstrip v1.0.0/go.mod h1:78ihd09MekBnJnxpICcwzCMzGrKSKYe4AqU6PDYYpjk=
 github.com/Shopify/goreferrer v0.0.0-20220729165902-8cddb4f5de06 h1:KkH3I3sJuOLP3TjA/dfr4NAY8bghDwnXiU7cTKxQqo0=
 github.com/Shopify/goreferrer v0.0.0-20220729165902-8cddb4f5de06/go.mod h1:7erjKLwalezA0k99cWs5L11HWOAPNjdUZ6RxH1BXbbM=
+github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
 github.com/andybalholm/brotli v1.0.5/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/apapsch/go-jsonmerge/v2 v2.0.0 h1:axGnT1gRIfimI7gJifB699GoE/oq+F2MU7Dml6nw9rQ=
@@ -33,7 +36,6 @@ github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1
 github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
 github.com/bytedance/sonic v1.10.2 h1:GQebETVBxYB7JGWJtLBi07OVzWwt+8dWA00gEVW2ZFE=
 github.com/bytedance/sonic v1.10.2/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
-github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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@@ -44,15 +46,18 @@ github.com/chenzhuoyu/iasm v0.9.0 h1:9fhXjVzq5hUy2gkhhgHl95zG2cEAhw9OSGs8toWWAwo
 github.com/chenzhuoyu/iasm v0.9.0/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
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+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
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 github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
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 github.com/flosch/pongo2/v4 v4.0.2/go.mod h1:B5ObFANs/36VwxxlgKpdchIJHMvHB562PW+BWPhwZD8=
 github.com/frankban/quicktest v1.11.0/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
 github.com/frankban/quicktest v1.11.2/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
+github.com/frankban/quicktest v1.13.0 h1:yNZif1OkDfNoDfb9zZa9aXIpejNR4F23Wely0c+Qdqk=
 github.com/frankban/quicktest v1.13.0/go.mod h1:qLE0fzW0VuyUAJgPU19zByoIr0HtCHN/r/VLSOOIySU=
 github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
 github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
@@ -62,12 +67,14 @@ github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
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+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
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 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
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 github.com/go-playground/validator/v10 v10.15.5/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
+github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
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 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -80,6 +87,8 @@ github.com/gomarkdown/markdown v0.0.0-20230922112808-5421fefb8386 h1:EcQR3gusLHN
 github.com/gomarkdown/markdown v0.0.0-20230922112808-5421fefb8386/go.mod h1:JDGcbDT52eL4fju3sZ4TeHGsQwhG9nbDV21aMyhwPoA=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
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@@ -87,16 +96,22 @@ github.com/gorilla/css v1.0.0 h1:BQqNyPTi50JCFMTw/b67hByjMVXZRwGha6wxVGkeihY=
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+github.com/gosnmp/gosnmp v1.37.0 h1:/Tf8D3b9wrnNuf/SfbvO+44mPrjVphBhRtcGg22V07Y=
+github.com/gosnmp/gosnmp v1.37.0/go.mod h1:GDH9vNqpsD7f2HvZhKs5dlqSEcAS6s6Qp099oZRCR+M=
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@@ -123,8 +138,10 @@ github.com/klauspost/cpuid/v2 v2.2.5 h1:0E5MSMDEoAulmXNFquVs//DdoomxaoTY1kUhbc/q
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@@ -147,11 +164,15 @@ github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zk
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@@ -164,6 +185,7 @@ github.com/pelletier/go-toml/v2 v2.1.0 h1:FnwAJ4oYMvbT/34k9zzHuZNrhlz48GB3/s6at6
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@@ -173,10 +195,13 @@ github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdO
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+github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/sanity-io/litter v1.5.5 h1:iE+sBxPBzoK6uaEP5Lt3fHNgpKcHXc/A2HGETy0uJQo=
 github.com/schollz/closestmatch v2.1.0+incompatible h1:Uel2GXEpJqOWBrlyI+oY9LTiyyjYS17cCYRqP13/SHk=
 github.com/schollz/closestmatch v2.1.0+incompatible/go.mod h1:RtP1ddjLong6gTkbtmuhtR2uUrrJOpYzYRvbcPAid+g=
+github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
 github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
 github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
@@ -195,11 +220,13 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/tdewolff/minify/v2 v2.12.9 h1:dvn5MtmuQ/DFMwqf5j8QhEVpPX6fi3WGImhv8RUB4zA=
 github.com/tdewolff/minify/v2 v2.12.9/go.mod h1:qOqdlDfL+7v0/fyymB+OP497nIxJYSvX4MQWA8OoiXU=
 github.com/tdewolff/parse/v2 v2.6.8 h1:mhNZXYCx//xG7Yq2e/kVLNZw4YfYmeHbhx+Zc0OvFMA=
 github.com/tdewolff/parse/v2 v2.6.8/go.mod h1:XHDhaU6IBgsryfdnpzUXBlT6leW/l25yrFBTEb4eIyM=
+github.com/tdewolff/test v1.0.9 h1:SswqJCmeN4B+9gEAi/5uqT0qpi1y2/2O47V/1hhGZT0=
 github.com/tdewolff/test v1.0.9/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=
 github.com/tklauser/go-sysconf v0.3.12 h1:0QaGUFOdQaIVdPgfITYzaTegZvdCjmYO52cSFAEVmqU=
 github.com/tklauser/go-sysconf v0.3.12/go.mod h1:Ho14jnntGE1fpdOqQEEaiKRpvIavV0hSfmBq8nJbHYI=
@@ -218,8 +245,14 @@ github.com/vmihailenco/msgpack/v5 v5.4.0 h1:hRM0digJwyR6vll33NNAwCFguy5JuBD6jxDm
 github.com/vmihailenco/msgpack/v5 v5.4.0/go.mod h1:GaZTsDaehaPpQVyxrf5mtQlH+pc21PIudVV/E3rRQok=
 github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
 github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f h1:J9EGpcZtP0E/raorCMxlFGSTBrsSlaDGf3jU/qvAE2c=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
+github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
+github.com/yalp/jsonpath v0.0.0-20180802001716-5cc68e5049a0 h1:6fRhSjgLCkTD3JnJxvaJ4Sj+TYblw757bqYgZaOq5ZY=
 github.com/yosssi/ace v0.0.5 h1:tUkIP/BLdKqrlrPwcmH0shwEEhTRHoGnc1wFIWmaBUA=
 github.com/yosssi/ace v0.0.5/go.mod h1:ALfIzm2vT7t5ZE7uoIZqF3TQ7SAOyupFZnkrF5id+K0=
+github.com/yudai/gojsondiff v1.0.0 h1:27cbfqXLVEJ1o8I6v3y9lg8Ydm53EKqHXAOMxEGlCOA=
+github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 h1:BHyfKlQyqbsFN5p3IfnEUduWvb9is428/nNb5L3U01M=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1 h1:P7S/GeHBAFEZIYp0ePPs2kHXoazz8q2KsyxHyQVGCJg=
 golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1/go.mod h1:9CWpnTUmlQkfdpdutA1nNf4iE5lAVt3QZOu0Z6hahBE=
@@ -283,13 +316,16 @@ google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqw
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
 gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+moul.io/http2curl/v2 v2.3.0 h1:9r3JfDzWPcbIklMOs2TnIFzDYvfAZvjeavG6EzP7jYs=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

receivers/receiveManager.go

@@ -15,6 +15,7 @@ var AvailableReceivers = map[string]func(name string, config json.RawMessage) (R
 	"ipmi":    NewIPMIReceiver,
 	"nats":    NewNatsReceiver,
 	"redfish": NewRedfishReceiver,
+	"snmp":    NewSNMPReceiver,
 }
 
 type receiveManager struct {

receivers/snmpReceiver.go

@@ -0,0 +1,294 @@
+package receivers
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/gosnmp/gosnmp"
+)
+
+type SNMPReceiverTargetConfig struct {
+	Hostname  string `json:"hostname"`
+	Port      int    `json:"port,omitempty"`
+	Community string `json:"community,omitempty"`
+	Timeout   string `json:"timeout,omitempty"`
+	timeout   time.Duration
+	Version   string `json:"version,omitempty"`
+	Type      string `json:"type,omitempty"`
+	TypeId    string `json:"type-id,omitempty"`
+	SubType   string `json:"subtype,omitempty"`
+	SubTypeId string `json:"subtype-id,omitempty"`
+}
+
+type SNMPReceiverMetricConfig struct {
+	Name string `json:"name"`
+	OID  string `json:"oid"`
+	Unit string `json:"unit,omitempty"`
+}
+
+// SNMPReceiver configuration: receiver type, listen address, port
+type SNMPReceiverConfig struct {
+	Type         string                     `json:"type"`
+	Targets      []SNMPReceiverTargetConfig `json:"targets"`
+	Metrics      []SNMPReceiverMetricConfig `json:"metrics"`
+	ReadInterval string                     `json:"read_interval,omitempty"`
+}
+
+type SNMPReceiver struct {
+	receiver
+	config SNMPReceiverConfig
+
+	// Storage for static information
+	meta map[string]string
+	tags map[string]string
+	// Use in case of own go routine
+	done     chan bool
+	wg       sync.WaitGroup
+	interval time.Duration
+}
+
+func validOid(oid string) bool {
+	// Regex from https://github.com/BornToBeRoot/NETworkManager/blob/6805740762bf19b95051c7eaa73cf2b4727733c3/Source/NETworkManager.Utilities/RegexHelper.cs#L88
+	// Match on leading dot added by Thomas Gruber <thomas.gruber@fau.de>
+	match, err := regexp.MatchString(`^[\.]?[012]\.(?:[0-9]|[1-3][0-9])(\.\d+)*$`, oid)
+	if err != nil {
+		return false
+	}
+	return match
+}
+
+func (r *SNMPReceiver) readTarget(target SNMPReceiverTargetConfig, output chan lp.CCMetric) {
+	port := uint16(161)
+	comm := "public"
+	timeout := time.Duration(1) * time.Second
+	version := gosnmp.Version2c
+	timestamp := time.Now()
+	if target.Port > 0 {
+		port = uint16(target.Port)
+	}
+	if len(target.Community) > 0 {
+		comm = target.Community
+	}
+	if target.timeout > 0 {
+		timeout = target.timeout
+	}
+	if len(target.Version) > 0 {
+		switch target.Version {
+		case "1":
+			version = gosnmp.Version1
+		case "2c":
+			version = gosnmp.Version2c
+		case "3":
+			version = gosnmp.Version3
+		default:
+			cclog.ComponentError(r.name, "Invalid SNMP version ", target.Version)
+			return
+		}
+	}
+	params := &gosnmp.GoSNMP{
+		Target:    target.Hostname,
+		Port:      port,
+		Community: comm,
+		Version:   version,
+		Timeout:   timeout,
+	}
+	err := params.Connect()
+	if err != nil {
+		cclog.ComponentError(r.name, err.Error())
+		return
+	}
+	for _, metric := range r.config.Metrics {
+		if !validOid(metric.OID) {
+			cclog.ComponentDebug(r.name, "Skipping ", metric.Name, ", not valid OID: ", metric.OID)
+			continue
+		}
+		oids := make([]string, 0)
+		name := gosnmp.SnmpPDU{
+			Value: metric.Name,
+			Name:  metric.Name,
+		}
+		nameidx := -1
+		value := gosnmp.SnmpPDU{
+			Value: nil,
+			Name:  metric.OID,
+		}
+		valueidx := -1
+		unit := gosnmp.SnmpPDU{
+			Value: metric.Unit,
+			Name:  metric.Unit,
+		}
+		unitidx := -1
+		idx := 0
+		if validOid(metric.Name) {
+			oids = append(oids, metric.Name)
+			nameidx = idx
+			idx = idx + 1
+		}
+		if validOid(metric.OID) {
+			oids = append(oids, metric.OID)
+			valueidx = idx
+			idx = idx + 1
+		}
+		if len(metric.Unit) > 0 && validOid(metric.Unit) {
+			oids = append(oids, metric.Unit)
+			unitidx = idx
+		}
+		//cclog.ComponentDebug(r.name, len(oids), oids)
+		result, err := params.Get(oids)
+		if err != nil {
+			cclog.ComponentError(r.name, "failed to get data for OIDs ", strings.Join(oids, ","), ": ", err.Error())
+			continue
+		}
+		if nameidx >= 0 && len(result.Variables) > nameidx {
+			name = result.Variables[nameidx]
+		}
+		if valueidx >= 0 && len(result.Variables) > valueidx {
+			value = result.Variables[valueidx]
+		}
+		if unitidx >= 0 && len(result.Variables) > unitidx {
+			unit = result.Variables[unitidx]
+		}
+		tags := r.tags
+		if len(target.Type) > 0 {
+			tags["type"] = target.Type
+		}
+		if len(target.TypeId) > 0 {
+			tags["type-id"] = target.TypeId
+		}
+		if len(target.SubType) > 0 {
+			tags["stype"] = target.SubType
+		}
+		if len(target.SubTypeId) > 0 {
+			tags["stype-id"] = target.SubTypeId
+		}
+		if value.Value != nil {
+			y, err := lp.New(name.Value.(string), tags, r.meta, map[string]interface{}{"value": value.Value}, timestamp)
+			if err == nil {
+				if len(unit.Name) > 0 && unit.Value != nil {
+					y.AddMeta("unit", unit.Value.(string))
+				}
+				output <- y
+			}
+		}
+	}
+	params.Conn.Close()
+}
+
+// Implement functions required for Receiver interface
+// Start(), Close()
+// See: metricReceiver.go
+
+func (r *SNMPReceiver) Start() {
+	cclog.ComponentDebug(r.name, "START")
+
+	r.done = make(chan bool)
+	r.wg.Add(1)
+	go func() {
+		defer r.wg.Done()
+
+		// Create ticker
+		ticker := time.NewTicker(r.interval)
+		defer ticker.Stop()
+
+		for {
+			select {
+			case <-ticker.C:
+				// process ticker event -> continue
+				if r.sink != nil {
+					for _, t := range r.config.Targets {
+						select {
+						case <-r.done:
+							return
+						default:
+							r.readTarget(t, r.sink)
+						}
+					}
+				}
+				continue
+			case <-r.done:
+				return
+			}
+		}
+	}()
+}
+
+// Close receiver: close network connection, close files, close libraries, ...
+func (r *SNMPReceiver) Close() {
+	cclog.ComponentDebug(r.name, "CLOSE")
+
+	r.done <- true
+	r.wg.Wait()
+}
+
+// New function to create a new instance of the receiver
+// Initialize the receiver by giving it a name and reading in the config JSON
+func NewSNMPReceiver(name string, config json.RawMessage) (Receiver, error) {
+	var err error = nil
+	r := new(SNMPReceiver)
+
+	// Set name of SNMPReceiver
+	// The name should be chosen in such a way that different instances of SNMPReceiver can be distinguished
+	r.name = fmt.Sprintf("SNMPReceiver(%s)", name)
+
+	// Set static information
+	r.meta = map[string]string{"source": r.name, "group": "SNMP"}
+	r.tags = map[string]string{"type": "node"}
+
+	// Set defaults in r.config
+	r.interval = time.Duration(30) * time.Second
+
+	// Read the sample receiver specific JSON config
+	if len(config) > 0 {
+		err := json.Unmarshal(config, &r.config)
+		if err != nil {
+			cclog.ComponentError(r.name, "Error reading config:", err.Error())
+			return nil, err
+		}
+	}
+
+	// Check that all required fields in the configuration are set
+	if len(r.config.Targets) == 0 {
+		err = fmt.Errorf("no targets configured, exiting")
+		cclog.ComponentError(r.name, err.Error())
+		return nil, err
+	}
+
+	if len(r.config.Metrics) == 0 {
+		err = fmt.Errorf("no metrics configured, exiting")
+		cclog.ComponentError(r.name, err.Error())
+		return nil, err
+	}
+
+	if len(r.config.ReadInterval) > 0 {
+		d, err := time.ParseDuration(r.config.ReadInterval)
+		if err != nil {
+			err = fmt.Errorf("failed to parse read interval, exiting")
+			cclog.ComponentError(r.name, err.Error())
+			return nil, err
+		}
+		r.interval = d
+	}
+	newtargets := make([]SNMPReceiverTargetConfig, 0)
+	for _, t := range r.config.Targets {
+		t.timeout = time.Duration(1) * time.Second
+		if len(t.Timeout) > 0 {
+			d, err := time.ParseDuration(t.Timeout)
+			if err != nil {
+				err = fmt.Errorf("failed to parse interval for target %s", t.Hostname)
+				cclog.ComponentError(r.name, err.Error())
+				continue
+			}
+			t.timeout = d
+		}
+		newtargets = append(newtargets, t)
+	}
+	r.config.Targets = newtargets
+
+	return r, nil
+}

receivers/snmpReceiver.md

@@ -0,0 +1,56 @@
+# SNMP Receiver
+
+```json
+  "<name>": {
+    "type": "snmp",
+    "read_interval": "30s",
+    "targets" : [{
+        "hostname" : "host1.example.com",
+        "port" : 161,
+        "community": "public",
+        "timeout" : 1,
+    }],
+    "metrics" : [
+        {
+            "name": "sensor1",
+            "value": "1.3.6.1.2.1.1.4.0",
+            "unit": "1.3.6.1.2.1.1.7.0",
+        },
+        {
+            "name": "1.3.6.1.2.1.1.2.0",
+            "value": "1.3.6.1.2.1.1.4.0",
+            "unit": "mb/s",
+        }
+    ]
+  }
+```
+
+The `snmp` receiver uses [gosnmp](https://github.com/gosnmp/gosnmp) to read metrics from network-attached devices.
+
+The configuration of SNMP is quite extensive due to it's flexibility.
+
+## Configuration
+
+- `type` has to be `snmp`
+- `read_interval` as duration like '1s' or '20s' (default '30s')
+
+For the receiver, the configuration is split in two parts:
+### Target configuration
+
+Each network-attached device that should be queried. A target consits of
+- `hostname`
+- `port` (default 161)
+- `community` (default `public`)
+- `timeout` as duration like '1s' or '20s' (default '1s')
+- `version` SNMP version `X` (`X` in `1`, `2c`, `3`) (default `2c`)
+- `type` to specify `type` tag for the target (default `node`)
+- `type-id` to specify `type-id` tag for the target
+- `stype` to specify `stype` tag (sub type) for the target
+- `stype-id` to specify `stype-id` tag for the target
+
+### Metric configuration
+- `name` can be an OID or a user-given string
+- `value` has to be an OID
+- `unit` can be empty, an OID or a user-given string
+
+If a OID is used for `name` or `unit`, the receiver will use the returned values to create the output metric. If there are any issues with the returned values, it uses the `OID`.