Merge pull request #127581 from richabanker/flagz-apiserver

Add flagz endpoint for apiserver

Kubernetes-commit: 4d91d502832ce55204343d7864fe28019d87b2bb

go.mod

@@ -53,7 +53,7 @@ require (
 	k8s.io/api v0.0.0-20241108114315-3f43b5a94246
 	k8s.io/apimachinery v0.0.0-20241108022104-96b97de8d6ba
 	k8s.io/client-go v0.0.0-20241108115827-ec126553e25c
-	k8s.io/component-base v0.0.0-20241108123300-35b74786c418
+	k8s.io/component-base v0.0.0-20241108123302-804c0075c12f
 	k8s.io/klog/v2 v2.130.1
 	k8s.io/kms v0.0.0-20241107031913-7a7a59ea9c74
 	k8s.io/kube-openapi v0.0.0-20241105132330-32ad38e42d3f

go.sum

@@ -371,8 +371,8 @@ k8s.io/apimachinery v0.0.0-20241108022104-96b97de8d6ba h1:ghB5Iygt6Ge8UyIwW7C1kJ
 k8s.io/apimachinery v0.0.0-20241108022104-96b97de8d6ba/go.mod h1:HqhdaJUgQqky29T1V0o2yFkt/pZqLFIDyn9Zi/8rxoY=
 k8s.io/client-go v0.0.0-20241108115827-ec126553e25c h1:oFkwLbL3wiQ1J3kiXB3e8RekXFhWB4G3jtWxX4qz/fk=
 k8s.io/client-go v0.0.0-20241108115827-ec126553e25c/go.mod h1:qdg0yiHKZF4DimKIPqdu9N9y1VLkHDn8Jtbsblkf6O0=
-k8s.io/component-base v0.0.0-20241108123300-35b74786c418 h1:QwfJ5xnagesBw1NsW9GQ1egcdSfNsWOyPb/2RkdZUic=
-k8s.io/component-base v0.0.0-20241108123300-35b74786c418/go.mod h1:xoGVbsAaeyCMTUz4Ck1TA3Tz7SSE9Suryx+nCTkuChM=
+k8s.io/component-base v0.0.0-20241108123302-804c0075c12f h1:zBczlQ6ESDT3aiohj4+/Bl8IWFr8VX6WHXX785ovbIg=
+k8s.io/component-base v0.0.0-20241108123302-804c0075c12f/go.mod h1:sML5FQmBLTD6jQvLcucPw9JohoW6PnlBvP7NBkLIYb8=
 k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
 k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
 k8s.io/kms v0.0.0-20241107031913-7a7a59ea9c74 h1:4Ib0RezwyOw06/9W8ACHhLDxtRCgZc0IERyyivhOp/E=

pkg/server/config.go

@@ -79,6 +79,7 @@ import (
 	"k8s.io/component-base/metrics/prometheus/slis"
 	"k8s.io/component-base/tracing"
 	utilversion "k8s.io/component-base/version"
+	"k8s.io/component-base/zpages/flagz"
 	"k8s.io/klog/v2"
 	openapicommon "k8s.io/kube-openapi/pkg/common"
 	"k8s.io/kube-openapi/pkg/spec3"
@@ -189,6 +190,7 @@ type Config struct {
 	LivezChecks []healthz.HealthChecker
 	// The default set of readyz-only checks. There might be more added via AddReadyzChecks dynamically.
 	ReadyzChecks []healthz.HealthChecker
+	Flagz        flagz.Reader
 	// LegacyAPIGroupPrefixes is used to set up URL parsing for authorization and for validating requests
 	// to InstallLegacyAPIGroup. New API servers don't generally have legacy groups at all.
 	LegacyAPIGroupPrefixes sets.String