diff --git a/README.md b/README.md index 7856327..6423111 100644 --- a/README.md +++ b/README.md @@ -337,6 +337,71 @@ instead of a total sum. `<1.14`, it is not as percise as using `averageValue` and will not be supported after Kubernetes `v1.16` is released according to the [support policy](https://kubernetes.io/docs/setup/release/version-skew-policy/).** +## InfluxDB collector + +The InfluxDB collector maps [Flux](https://github.com/influxdata/flux) queries to metrics that can be used for scaling. + +Note that the collector targets an [InfluxDB v2](https://v2.docs.influxdata.com/v2.0/get-started/) instance, that's why +we only support Flux instead of InfluxQL. + +### Supported metrics + +| Metric | Description | Type | Kind | K8s Versions | +| ------------ | -------------- | ------- | -- | -- | +| `flux-query` | Generic metric which requires a user defined query. | External | | `>=1.10` | + +### Example: External Metric + +This is an example of an HPA configured to get metrics based on a Flux query. +The query is defined in the annotation +`metric-config.external.flux-query.influxdb/queue_depth` +where `queue_depth` is the query name which will be associated with the result of the query. +A matching `query-name` label must be defined in the `matchLabels` of the metric definition. +This allows having multiple flux queries associated with a single HPA. + +```yaml +apiVersion: autoscaling/v2beta1 +kind: HorizontalPodAutoscaler +metadata: + name: my-hpa + annotations: + # These annotations are optional. + # If specified, then they are used for setting up the InfluxDB client properly, + # instead of using the ones specified via CLI. Respectively: + # - --influxdb-address + # - --influxdb-token + # - --influxdb-org-id + metric-config.external.flux-query.influxdb/address: "http://influxdbv2.my-namespace.svc" + metric-config.external.flux-query.influxdb/token: "secret-token" + metric-config.external.flux-query.influxdb/org-id: "deadbeef" + # metric-config.../ + # == query-name + metric-config.external.flux-query.influxdb/queue_depth: | + from(bucket: "apps") + |> range(start: -30s) + |> filter(fn: (r) => r._measurement == "queue_depth") + |> group() + |> max() + // Rename "_value" to "metricvalue" for letting the metrics server properly unmarshal the result. + |> rename(columns: {_value: "metricvalue"}) + |> keep(columns: ["metricvalue"]) +spec: + scaleTargetRef: + apiVersion: apps/v1 + kind: Deployment + name: queryd-v1 + minReplicas: 1 + maxReplicas: 4 + metrics: + - type: External + external: + metricName: flux-query + metricSelector: + matchLabels: + query-name: queue_depth + targetValue: 1 +``` + ## AWS collector The AWS collector allows scaling based on external metrics exposed by AWS diff --git a/go.mod b/go.mod index 149ea54..f8b0703 100644 --- a/go.mod +++ b/go.mod @@ -7,8 +7,7 @@ require ( github.com/golang/groupcache v0.0.0-20180513044358-24b0969c4cb7 // indirect github.com/googleapis/gnostic v0.2.0 // indirect github.com/grpc-ecosystem/grpc-gateway v1.4.1 // indirect - github.com/imdario/mergo v0.3.6 // indirect - github.com/inconshreveable/mousetrap v1.0.0 // indirect + github.com/influxdata/influxdb-client-go v0.1.4 github.com/kubernetes-incubator/custom-metrics-apiserver v0.0.0-20190918110929-3d9be26a50eb github.com/oliveagle/jsonpath v0.0.0-20180606110733-2e52cf6e6852 github.com/prometheus/client_golang v0.9.2 diff --git a/go.sum b/go.sum index e4039c7..b98f3e4 100644 --- a/go.sum +++ b/go.sum @@ -12,21 +12,49 @@ github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6L github.com/Azure/go-autorest/tracing v0.5.0/go.mod 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v0.0.0-20180705093442-88bfeed483d3 h1:h/wTyTK7VVFaS github.com/coreos/go-systemd v0.0.0-20180705093442-88bfeed483d3/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4= github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea h1:n2Ltr3SrfQlf/9nOna1DoGKxLx3qTSI8Ttl6Xrqp6mw= github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA= +github.com/dave/jennifer v1.2.0/go.mod h1:fIb+770HOpJ2fmN9EPPKOqm1vMGhB+TwXKMZhrIygKg= github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= @@ -52,11 +81,16 @@ github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkg github.com/emicklei/go-restful v0.0.0-20170410110728-ff4f55a20633/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs= 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v0.0.0-20150909031657-73d445a93680/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04= +github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0= github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas= github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0= github.com/go-openapi/jsonpointer v0.19.2 h1:A9+F4Dc/MCNB5jibxf6rRvOvR/iFgQdyNx9eIhnGqq0= @@ -70,6 +104,8 @@ github.com/go-openapi/spec v0.19.2/go.mod h1:sCxk3jxKgioEJikev4fgkNmwS+3kuYdJtcs github.com/go-openapi/swag v0.0.0-20160704191624-1d0bd113de87/go.mod h1:DXUve3Dpr1UfpPtxFw+EFuQ41HhCWZfha5jSVRG7C7I= github.com/go-openapi/swag v0.19.2 h1:jvO6bCMBEilGwMfHhrd61zIID4oIFdwb76V17SM88dE= github.com/go-openapi/swag v0.19.2/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk= +github.com/go-sql-driver/mysql v1.4.0 h1:7LxgVwFb2hIQtMm87NdgAVfXjnt4OePseqT1tKx+opk= +github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w= github.com/gogo/protobuf v1.2.2-0.20190723190241-65acae22fc9d h1:3PaI8p3seN09VjbTYC/QWlUZdZ1qS1zGjy7LH2Wt07I= github.com/gogo/protobuf v1.2.2-0.20190723190241-65acae22fc9d/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o= github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58= @@ -84,16 +120,24 @@ github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg= github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= +github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w= +github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q= 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v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3 github.com/spf13/pflag v0.0.0-20170130214245-9ff6c6923cff/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4= github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg= github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4= +github.com/src-d/gcfg v1.4.0/go.mod h1:p/UMsR43ujA89BJY9duynAwIpvqEujIH/jFlfL7jWoI= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE= github.com/stretchr/testify v0.0.0-20151208002404-e3a8ff8ce365/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= +github.com/stretchr/testify v1.2.0/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= +github.com/stretchr/testify v1.2.1/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= 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h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw= @@ -251,10 +362,14 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU= golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9/go.mod 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h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE= google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= +google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/appengine v1.5.0 h1:KxkO13IPW4Lslp2bz+KHP2E3gtFlrIGNThxkZQ3g+4c= google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= @@ -298,6 +422,7 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY= gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4= gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= gopkg.in/inf.v0 v0.9.0/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw= @@ -306,16 +431,23 @@ gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw= gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8= gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k= gopkg.in/square/go-jose.v2 v2.2.2/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI= +gopkg.in/src-d/go-billy.v4 v4.2.1/go.mod h1:tm33zBoOwxjYHZIE+OV8bxTWFMJLrconzFMd38aARFk= +gopkg.in/src-d/go-git-fixtures.v3 v3.1.1/go.mod h1:dLBcvytrw/TYZsNTWCnkNF2DSIlzWYqTe3rJR56Ac7g= +gopkg.in/src-d/go-git.v4 v4.8.1/go.mod h1:Vtut8izDyrM8BUVQnzJ+YvmNcem2J89EmfZYCkLokZk= gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ= gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= +gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI= gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw= +honnef.co/go/tools v0.0.0-20181108184350-ae8f1f9103cc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.2 h1:TEgegKbBqByGUb1Coo1pc2qIdf2xw6v0mYyLSYtyopE= +honnef.co/go/tools v0.0.1-2019.2.2/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= k8s.io/api v0.0.0-20190918155943-95b840bb6a1f h1:8FRUST8oUkEI45WYKyD8ed7Ad0Kg5v11zHyPkEVb2xo= k8s.io/api v0.0.0-20190918155943-95b840bb6a1f/go.mod h1:uWuOHnjmNrtQomJrvEBg0c0HRNyQ+8KTEERVsK0PW48= k8s.io/apimachinery v0.0.0-20190913080033-27d36303b655 h1:CS1tBQz3HOXiseWZu6ZicKX361CZLT97UFnnPx0aqBw= diff --git a/pkg/annotations/parser_test.go b/pkg/annotations/parser_test.go index 96bcb2a..554b206 100644 --- a/pkg/annotations/parser_test.go +++ b/pkg/annotations/parser_test.go @@ -65,6 +65,27 @@ func TestParser(t *testing.T) { }, PerReplica: false, }, + { + Name: "influxdb metrics", + Annotations: map[string]string{ + "metric-config.external.flux-query.influxdb/range1m": `from(bucket: "?") |> range(start: -1m)`, + "metric-config.external.flux-query.influxdb/range2m": `from(bucket: "?") |> range(start: -2m)`, + "metric-config.external.flux-query.influxdb/range3m": `from(bucket: "?") |> range(start: -3m)`, + "metric-config.external.flux-query.influxdb/address": "http://localhost:9999", + "metric-config.external.flux-query.influxdb/token": "sEcr3TT0ken", + "metric-config.external.flux-query.influxdb/org-id": "deadbeef", + }, + MetricName: "flux-query", + MetricType: autoscalingv2.ExternalMetricSourceType, + ExpectedConfig: map[string]string{ + "range1m": `from(bucket: "?") |> range(start: -1m)`, + "range2m": `from(bucket: "?") |> range(start: -2m)`, + "range3m": `from(bucket: "?") |> range(start: -3m)`, + "address": "http://localhost:9999", + "token": "sEcr3TT0ken", + "org-id": "deadbeef", + }, + }, } { t.Run(tc.Name, func(t *testing.T) { hpaMap := make(AnnotationConfigMap) diff --git a/pkg/collector/influxdb_collector.go b/pkg/collector/influxdb_collector.go new file mode 100644 index 0000000..6db62dd --- /dev/null +++ b/pkg/collector/influxdb_collector.go @@ -0,0 +1,152 @@ +package collector + +import ( + "context" + "fmt" + "time" + + "github.com/influxdata/influxdb-client-go" + "k8s.io/api/autoscaling/v2beta2" + autoscalingv2 "k8s.io/api/autoscaling/v2beta2" + "k8s.io/apimachinery/pkg/api/resource" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + "k8s.io/metrics/pkg/apis/external_metrics" +) + +const ( + InfluxDBMetricName = "flux-query" + influxDBAddressKey = "address" + influxDBTokenKey = "token" + influxDBOrgIDKey = "org-id" + influxDBQueryNameLabelKey = "query-name" +) + +type InfluxDBCollectorPlugin struct { + kubeClient kubernetes.Interface + address string + token string + orgID string +} + +func NewInfluxDBCollectorPlugin(client kubernetes.Interface, address, token, orgID string) (*InfluxDBCollectorPlugin, error) { + return &InfluxDBCollectorPlugin{ + kubeClient: client, + address: address, + token: token, + orgID: orgID, + }, nil +} + +func (p *InfluxDBCollectorPlugin) NewCollector(hpa *v2beta2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (Collector, error) { + return NewInfluxDBCollector(p.address, p.orgID, p.token, hpa, config, interval) +} + +type InfluxDBCollector struct { + influxDBClient *influxdb.Client + hpa *autoscalingv2.HorizontalPodAutoscaler + interval time.Duration + metric autoscalingv2.MetricIdentifier + metricType autoscalingv2.MetricSourceType + query string + orgID string +} + +func NewInfluxDBCollector(address string, token string, orgID string, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*InfluxDBCollector, error) { + collector := &InfluxDBCollector{ + hpa: hpa, + interval: interval, + metric: config.Metric, + metricType: config.Type, + } + switch configType := config.Type; configType { + case autoscalingv2.ObjectMetricSourceType: + return nil, fmt.Errorf("InfluxDB does not support object, but only external custom metrics") + case autoscalingv2.ExternalMetricSourceType: + // `metricSelector` is flattened into the MetricConfig.Config. + queryName, ok := config.Config[influxDBQueryNameLabelKey] + if !ok { + return nil, fmt.Errorf("selector for Flux query is not specified,"+ + "please add metricSelector.matchLabels.%s: <...> to .yml description", influxDBQueryNameLabelKey) + } + if query, ok := config.Config[queryName]; ok { + // TODO(affo): validate the query. + // This would mean depending on Flux and run a compilation. + // Otherwise, the InfluxDB client should expose a method for compilation only. + // Yeah, we could launch the query and if there is an error, check it was a compilation one + // (by checking the message), but that seems quite dirty. + collector.query = query + } else { + return nil, fmt.Errorf("no Flux query defined for metric \"%s\"", config.Metric.Name) + } + default: + return nil, fmt.Errorf("unknown metric type: %v", configType) + } + // Use custom InfluxDB config if defined in HPA annotation. + if v, found := config.Config[influxDBAddressKey]; found { + address = v + } + if v, found := config.Config[influxDBTokenKey]; found { + token = v + } + if v, found := config.Config[influxDBOrgIDKey]; found { + orgID = v + } + influxDbClient, err := influxdb.New(address, token) + if err != nil { + return nil, err + } + collector.influxDBClient = influxDbClient + collector.orgID = orgID + return collector, nil +} + +// queryResult is for unmarshaling the result from InfluxDB. +// The FluxQuery should make it so that the resulting table contains the column "metricvalue". +type queryResult struct { + MetricValue float64 +} + +// getValue returns the first result gathered from an InfluxDB instance. +func (c *InfluxDBCollector) getValue() (resource.Quantity, error) { + res, err := c.influxDBClient.QueryCSV(context.Background(), c.query, c.orgID) + if err != nil { + return resource.Quantity{}, err + } + defer res.Close() + // Keeping just the first result. + if res.Next() { + qr := queryResult{} + if err := res.Unmarshal(&qr); err != nil { + return resource.Quantity{}, fmt.Errorf("error in unmarshaling query result: %v", err) + } + return *resource.NewMilliQuantity(int64(qr.MetricValue*1000), resource.DecimalSI), nil + } + if err := res.Err; err != nil { + return resource.Quantity{}, fmt.Errorf("error in query result: %v", err) + } + return resource.Quantity{}, fmt.Errorf("empty result returned") +} + +func (c *InfluxDBCollector) GetMetrics() ([]CollectedMetric, error) { + v, err := c.getValue() + if err != nil { + return nil, err + } + cm := CollectedMetric{ + Type: c.metricType, + External: external_metrics.ExternalMetricValue{ + MetricName: c.metric.Name, + MetricLabels: c.metric.Selector.MatchLabels, + Timestamp: metav1.Time{ + Time: time.Now().UTC(), + }, + Value: v, + }, + } + return []CollectedMetric{cm}, nil +} + +func (c *InfluxDBCollector) Interval() time.Duration { + return c.interval +} diff --git a/pkg/server/start.go b/pkg/server/start.go index bb697e4..ca41013 100644 --- a/pkg/server/start.go +++ b/pkg/server/start.go @@ -88,6 +88,12 @@ func NewCommandStartAdapterServer(stopCh <-chan struct{}) *cobra.Command { "whether to enable External Metrics API") flags.StringVar(&o.PrometheusServer, "prometheus-server", o.PrometheusServer, ""+ "url of prometheus server to query") + flags.StringVar(&o.InfluxDBAddress, "influxdb-address", o.InfluxDBAddress, ""+ + "address of InfluxDB 2.x server to query (e.g. http://localhost:9999)") + flags.StringVar(&o.InfluxDBToken, "influxdb-token", o.InfluxDBToken, ""+ + "token for InfluxDB 2.x server to query") + flags.StringVar(&o.InfluxDBOrgID, "influxdb-org-id", o.InfluxDBOrgID, ""+ + "organization ID for InfluxDB 2.x server to query") flags.StringVar(&o.ZMONKariosDBEndpoint, "zmon-kariosdb-endpoint", o.ZMONKariosDBEndpoint, ""+ "url of ZMON KariosDB endpoint to query for ZMON checks") flags.StringVar(&o.ZMONTokenName, "zmon-token-name", o.ZMONTokenName, ""+ @@ -175,6 +181,14 @@ func (o AdapterServerOptions) RunCustomMetricsAdapterServer(stopCh <-chan struct } } + if o.InfluxDBAddress != "" { + influxdbPlugin, err := collector.NewInfluxDBCollectorPlugin(client, o.InfluxDBAddress, o.InfluxDBToken, o.InfluxDBOrgID) + if err != nil { + return fmt.Errorf("failed to initialize InfluxDB collector plugin: %v", err) + } + collectorFactory.RegisterExternalCollector([]string{collector.InfluxDBMetricName}, influxdbPlugin) + } + // register generic pod collector err = collectorFactory.RegisterPodsCollector("", collector.NewPodCollectorPlugin(client)) if err != nil { @@ -290,6 +304,12 @@ type AdapterServerOptions struct { // PrometheusServer enables prometheus queries to the specified // server PrometheusServer string + // InfluxDBAddress enables Flux queries to the specified InfluxDB instance + InfluxDBAddress string + // InfluxDBToken is the token used for querying InfluxDB + InfluxDBToken string + // InfluxDBOrgID is the organization ID used for querying InfluxDB + InfluxDBOrgID string // ZMONKariosDBEndpoint enables ZMON check queries to the specified // kariosDB endpoint ZMONKariosDBEndpoint string