Merge pull request kubernetes#95267 from twosigma/betahostnamefqdn

SetHostnameAsFQDN will be beta in v1.20, enable feature gate by default.

Author: k8s-ci-robot

pkg/features/kube_features.go

@@ -616,6 +616,7 @@ const (
 
 	// owner: @javidiaz
 	// alpha: v1.19
+	// beta: v1.20
 	//
 	// Allow setting the Fully Qualified Domain Name (FQDN) in the hostname of a Pod. If a Pod does not
 	// have FQDN, this feature has no effect.
@@ -733,7 +734,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	ExternalPolicyForExternalIP:                    {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.22
 	AnyVolumeDataSource:                            {Default: false, PreRelease: featuregate.Alpha},
 	DefaultPodTopologySpread:                       {Default: false, PreRelease: featuregate.Alpha},
-	SetHostnameAsFQDN:                              {Default: false, PreRelease: featuregate.Alpha},
+	SetHostnameAsFQDN:                              {Default: true, PreRelease: featuregate.Beta},
 	WinOverlay:                                     {Default: true, PreRelease: featuregate.Beta},
 	WinDSR:                                         {Default: false, PreRelease: featuregate.Alpha},
 	DisableAcceleratorUsageMetrics:                 {Default: true, PreRelease: featuregate.Beta},