From c288829533e42631aaa8b8fbf4992afc545de50a Mon Sep 17 00:00:00 2001 From: Hamid <33328203+emamihe@users.noreply.github.com> Date: Wed, 10 May 2023 16:06:02 +0300 Subject: [PATCH] added observability (#1026) --- monitoring/Dockerfile | 10 ++ monitoring/app.go | 92 ++++++++++++++++++ monitoring/go.mod | 56 +++++++++++ monitoring/go.sum | 217 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 375 insertions(+) create mode 100644 monitoring/Dockerfile create mode 100644 monitoring/app.go create mode 100644 monitoring/go.mod create mode 100644 monitoring/go.sum diff --git a/monitoring/Dockerfile b/monitoring/Dockerfile new file mode 100644 index 000000000..3a3fe9eba --- /dev/null +++ b/monitoring/Dockerfile @@ -0,0 +1,10 @@ +FROM golang:alpine AS build +WORKDIR /app +COPY . . +RUN go build -o main . + +# Stage 2: Run +FROM alpine +WORKDIR /app +COPY --from=build /app/main /app/ +CMD ["/app/main"] diff --git a/monitoring/app.go b/monitoring/app.go new file mode 100644 index 000000000..de67c3e84 --- /dev/null +++ b/monitoring/app.go @@ -0,0 +1,92 @@ +package main + +import ( + "context" + "fmt" + "net/http" + "strings" + "time" + + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/rest" +) + +var ( + zombieNamespaceCount = prometheus.NewGauge(prometheus.GaugeOpts{ + Name: "zombie_namespace_count", + Help: "Number of namespaces with names starting with 'zombie-'", + }) + + zombiePodsCount = prometheus.NewGaugeVec(prometheus.GaugeOpts{ + Name: "zombie_namespace_pods_count", + Help: "Number of pods in namespaces with names starting with 'zombie-'", + }, []string{"namespace"}) + + zombieNamespaceOld = prometheus.NewGaugeVec(prometheus.GaugeOpts{ + Name: "zombie_namespace_old", + Help: "Indicates if a namespace with a name starting with 'zombie-' is older than 2 days", + }, []string{"namespace"}) +) + +func init() { + prometheus.MustRegister(zombieNamespaceCount) + prometheus.MustRegister(zombiePodsCount) + prometheus.MustRegister(zombieNamespaceOld) +} + +func main() { + config, err := rest.InClusterConfig() + if err != nil { + panic(err) + } + + clientset, err := kubernetes.NewForConfig(config) + if err != nil { + panic(err) + } + + go func() { + for { + updateMetrics(clientset) + time.Sleep(1 * time.Minute) + } + }() + + http.Handle("/metrics", promhttp.Handler()) + http.ListenAndServe(":9090", nil) +} + +func updateMetrics(clientset *kubernetes.Clientset) { + namespaces, err := clientset.CoreV1().Namespaces().List(context.Background(), metav1.ListOptions{}) + if err != nil { + fmt.Printf("Error listing namespaces: %v\n", err) + return + } + + zombieNamespaceCounter := 0 + twoDaysAgo := time.Now().Add(-48 * time.Hour) + for _, ns := range namespaces.Items { + if strings.HasPrefix(ns.Name, "zombie-") { + zombieNamespaceCounter++ + + pods, err := clientset.CoreV1().Pods(ns.Name).List(context.Background(), metav1.ListOptions{}) + if err != nil { + fmt.Printf("Error listing pods in namespace %s: %v\n", ns.Name, err) + continue + } + + zombiePodsCount.WithLabelValues(ns.Name).Set(float64(len(pods.Items))) + + if ns.CreationTimestamp.Time.Before(twoDaysAgo) { + zombieNamespaceOld.WithLabelValues(ns.Name).Set(1) + } else { + zombieNamespaceOld.WithLabelValues(ns.Name).Set(0) + } + } + } + + zombieNamespaceCount.Set(float64(zombieNamespaceCounter)) +} diff --git a/monitoring/go.mod b/monitoring/go.mod new file mode 100644 index 000000000..743d00f65 --- /dev/null +++ b/monitoring/go.mod @@ -0,0 +1,56 @@ +module zombienet_metrics + +go 1.19 + +require ( + github.com/prometheus/client_golang v1.15.1 + k8s.io/client-go v0.27.1 +) + +require ( + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/emicklei/go-restful/v3 v3.9.0 // indirect + github.com/go-logr/logr v1.2.3 // indirect + github.com/go-openapi/jsonpointer v0.19.6 // indirect + github.com/go-openapi/jsonreference v0.20.1 // indirect + github.com/go-openapi/swag v0.22.3 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/google/gnostic v0.5.7-v3refs // indirect + github.com/google/go-cmp v0.5.9 // indirect + github.com/google/gofuzz v1.1.0 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/imdario/mergo v0.3.6 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.7 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/prometheus/client_model v0.3.0 // indirect + github.com/prometheus/common v0.42.0 // indirect + github.com/prometheus/procfs v0.9.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect + golang.org/x/net v0.8.0 // indirect + golang.org/x/oauth2 v0.5.0 // indirect + golang.org/x/sys v0.6.0 // indirect + golang.org/x/term v0.6.0 // indirect + golang.org/x/text v0.8.0 // indirect + golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/api v0.27.1 // indirect + k8s.io/apimachinery v0.27.1 // indirect + k8s.io/klog/v2 v2.90.1 // indirect + k8s.io/kube-openapi v0.0.0-20230308215209-15aac26d736a // indirect + k8s.io/utils v0.0.0-20230209194617-a36077c30491 // indirect + sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect + sigs.k8s.io/yaml v1.3.0 // indirect +) diff --git a/monitoring/go.sum b/monitoring/go.sum new file mode 100644 index 000000000..76a55cd58 --- /dev/null +++ b/monitoring/go.sum @@ -0,0 +1,217 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= +github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= +github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44= +github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= +github.com/creack/pty 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