graduate DynamicKubeletConfig feature to beta

cluster/gce/util.sh

@@ -621,6 +621,9 @@ function construct-kubelet-flags {
   flags+=" --experimental-check-node-capabilities-before-mount=true"
   # Keep in sync with the mkdir command in configure-helper.sh (until the TODO is resolved)
   flags+=" --cert-dir=/var/lib/kubelet/pki/"
+  # Configure the directory that the Kubelet should use to store dynamic config checkpoints
+  flags+=" --dynamic-config-dir=/var/lib/kubelet/dynamic-config"
+
 
   if [[ "${master}" == "true" ]]; then
     flags+=" ${MASTER_KUBELET_TEST_ARGS:-}"

cmd/kubelet/app/options/options.go

@@ -371,7 +371,7 @@ func (f *KubeletFlags) AddFlags(mainfs *pflag.FlagSet) {
 
 	fs.StringVar(&f.RootDirectory, "root-dir", f.RootDirectory, "Directory path for managing kubelet files (volume mounts,etc).")
 
-	fs.Var(&f.DynamicConfigDir, "dynamic-config-dir", "The Kubelet will use this directory for checkpointing downloaded configurations and tracking configuration health. The Kubelet will create this directory if it does not already exist. The path may be absolute or relative; relative paths start at the Kubelet's current working directory. Providing this flag enables dynamic Kubelet configuration. Presently, you must also enable the DynamicKubeletConfig feature gate to pass this flag.")
+	fs.Var(&f.DynamicConfigDir, "dynamic-config-dir", "The Kubelet will use this directory for checkpointing downloaded configurations and tracking configuration health. The Kubelet will create this directory if it does not already exist. The path may be absolute or relative; relative paths start at the Kubelet's current working directory. Providing this flag enables dynamic Kubelet configuration. The DynamicKubeletConfig feature gate must be enabled to pass this flag; this gate currently defaults to true because the feature is beta.")
 
 	fs.BoolVar(&f.RegisterNode, "register-node", f.RegisterNode, "Register the node with the apiserver. If --kubeconfig is not provided, this flag is irrelevant, as the Kubelet won't have an apiserver to register with. Default=true.")
 	fs.Var(utiltaints.NewTaintsVar(&f.RegisterWithTaints), "register-with-taints", "Register the node with the given list of taints (comma separated \"<key>=<value>:<effect>\"). No-op if register-node is false.")

pkg/features/kube_features.go

@@ -35,6 +35,7 @@ const (
 
 	// owner: @mtaufen
 	// alpha: v1.4
+	// beta: v1.11
 	DynamicKubeletConfig utilfeature.Feature = "DynamicKubeletConfig"
 
 	// owner: @pweil-
@@ -290,7 +291,7 @@ func init() {
 // available throughout Kubernetes binaries.
 var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureSpec{
 	AppArmor:                                    {Default: true, PreRelease: utilfeature.Beta},
-	DynamicKubeletConfig:                        {Default: false, PreRelease: utilfeature.Alpha},
+	DynamicKubeletConfig:                        {Default: true, PreRelease: utilfeature.Beta},
 	ExperimentalHostUserNamespaceDefaultingGate: {Default: false, PreRelease: utilfeature.Beta},
 	ExperimentalCriticalPodAnnotation:           {Default: false, PreRelease: utilfeature.Alpha},
 	DevicePlugins:                               {Default: true, PreRelease: utilfeature.Beta},