Add leader election, work-queue, process, and Go runtime metrics

Author: AndrewSirenko

cmd/csi-resizer/main.go

@@ -53,6 +53,9 @@ import (
 	"k8s.io/component-base/logs"
 	logsapi "k8s.io/component-base/logs/api/v1"
 	_ "k8s.io/component-base/logs/json/register"
+	"k8s.io/component-base/metrics/legacyregistry"
+	_ "k8s.io/component-base/metrics/prometheus/clientgo/leaderelection" // register leader election in the default legacy registry
+	_ "k8s.io/component-base/metrics/prometheus/workqueue"               // register work queues in the default legacy registry
 )
 
 var (
@@ -177,6 +180,10 @@ func main() {
 		csiClient = migratedCsiClient
 	}
 
+	// Add default legacy registry so that metrics manager serves Go runtime and process metrics.
+	// Also registers the `k8s.io/component-base/` work queue and leader election metrics we anonymously import.
+	metricsManager.WithAdditionalRegistry(legacyregistry.DefaultGatherer)
+
 	csiResizer, err := resizer.NewResizerFromClient(
 		csiClient,
 		*timeout,

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/container-storage-interface/spec v1.11.0
 	github.com/google/go-cmp v0.6.0
 	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/kubernetes-csi/csi-lib-utils v0.20.0
+	github.com/kubernetes-csi/csi-lib-utils v0.21.0
 	golang.org/x/oauth2 v0.25.0 // indirect
 	golang.org/x/term v0.28.0 // indirect
 	google.golang.org/grpc v1.69.2

go.sum

@@ -60,8 +60,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/kubernetes-csi/csi-lib-utils v0.20.0 h1:JTvHRJugn+cByMnIU4nCnqPqOOUhuPzhlLqRvenwjDA=
-github.com/kubernetes-csi/csi-lib-utils v0.20.0/go.mod h1:3b/HFVURW11oxV/gUAKyhhkvFpxXO/zRdvh1wdEfCZY=
+github.com/kubernetes-csi/csi-lib-utils v0.21.0 h1:dUN/iIgXLucAxyML2iPyhniIlACQumIeAJmIzsMBddc=
+github.com/kubernetes-csi/csi-lib-utils v0.21.0/go.mod h1:ZCVRTYuup+bwX9tOeE5Q3LDw64QvltSwMUQ3M3g2T+Q=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/mailru/easyjson v0.9.0 h1:PrnmzHw7262yW8sTBwxi1PdJA3Iw/EKBa8psRf7d9a4=

vendor/github.com/kubernetes-csi/csi-lib-utils/metrics/metrics.go

@@ -87,7 +87,7 @@ github.com/klauspost/compress/internal/cpuinfo
 github.com/klauspost/compress/internal/snapref
 github.com/klauspost/compress/zstd
 github.com/klauspost/compress/zstd/internal/xxhash
-# github.com/kubernetes-csi/csi-lib-utils v0.20.0
+# github.com/kubernetes-csi/csi-lib-utils v0.21.0
 ## explicit; go 1.23.1
 github.com/kubernetes-csi/csi-lib-utils/accessmodes
 github.com/kubernetes-csi/csi-lib-utils/connection
@@ -784,7 +784,9 @@ k8s.io/component-base/logs/json/register
 k8s.io/component-base/logs/klogflags
 k8s.io/component-base/metrics
 k8s.io/component-base/metrics/legacyregistry
+k8s.io/component-base/metrics/prometheus/clientgo/leaderelection
 k8s.io/component-base/metrics/prometheus/feature
+k8s.io/component-base/metrics/prometheus/workqueue
 k8s.io/component-base/metrics/prometheusextension
 k8s.io/component-base/version
 # k8s.io/csi-translation-lib v0.32.0 => k8s.io/csi-translation-lib v0.32.0