kubeadm: promote etcd learner mode to GA

Author: pacoxu

cmd/kubeadm/app/features/features.go

@@ -34,7 +34,7 @@ const (
 	PublicKeysECDSA = "PublicKeysECDSA"
 	// RootlessControlPlane is expected to be in alpha in v1.22
 	RootlessControlPlane = "RootlessControlPlane"
-	// EtcdLearnerMode is expected to be in alpha in v1.27, beta in v1.29
+	// EtcdLearnerMode is expected to be in alpha in v1.27, beta in v1.29, ga in v1.32
 	EtcdLearnerMode = "EtcdLearnerMode"
 	// WaitForAllControlPlaneComponents is expected to be alpha in v1.30
 	WaitForAllControlPlaneComponents = "WaitForAllControlPlaneComponents"
@@ -53,7 +53,7 @@ var InitFeatureGates = FeatureList{
 		DeprecationMessage: "Deprecated in favor of the core kubelet feature UserNamespacesSupport which is beta since 1.30." +
 			" Once UserNamespacesSupport graduates to GA, kubeadm will start using it and RootlessControlPlane will be removed.",
 	},
-	EtcdLearnerMode:                  {FeatureSpec: featuregate.FeatureSpec{Default: true, PreRelease: featuregate.Beta}},
+	EtcdLearnerMode:                  {FeatureSpec: featuregate.FeatureSpec{Default: true, PreRelease: featuregate.GA, LockToDefault: true}},
 	WaitForAllControlPlaneComponents: {FeatureSpec: featuregate.FeatureSpec{Default: false, PreRelease: featuregate.Alpha}},
 	ControlPlaneKubeletLocalMode:     {FeatureSpec: featuregate.FeatureSpec{Default: false, PreRelease: featuregate.Alpha}},
 }