Promote WatchBookmarks feature to GA

Kubernetes-commit: a22a4ed3c54d6e30edc972f501fbfddc789bea9b

pkg/features/kube_features.go

@@ -123,6 +123,7 @@ const (
 	// owner: @wojtek-t
 	// alpha: v1.15
 	// beta: v1.16
+	// GA: v1.17
 	//
 	// Enables support for watch bookmark events.
 	WatchBookmark featuregate.Feature = "WatchBookmark"
@@ -161,7 +162,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	StorageVersionHash:      {Default: true, PreRelease: featuregate.Beta},
 	WinOverlay:              {Default: false, PreRelease: featuregate.Alpha},
 	WinDSR:                  {Default: false, PreRelease: featuregate.Alpha},
-	WatchBookmark:           {Default: true, PreRelease: featuregate.Beta},
+	WatchBookmark:           {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 	RequestManagement:       {Default: false, PreRelease: featuregate.Alpha},
 	RemoveSelfLink:          {Default: false, PreRelease: featuregate.Alpha},
 }

pkg/storage/cacher/cacher.go

@@ -301,8 +301,6 @@ type Cacher struct {
 	watchersToStop []*cacheWatcher
 	// Maintain a timeout queue to send the bookmark event before the watcher times out.
 	bookmarkWatchers *watcherBookmarkTimeBuckets
-	// watchBookmark feature-gate
-	watchBookmarkEnabled bool
 }
 
 // NewCacherFromConfig creates a new Cacher responsible for servicing WATCH and LIST requests from
@@ -359,7 +357,6 @@ func NewCacherFromConfig(config Config) (*Cacher, error) {
 		clock:            clock,
 		timer:            time.NewTimer(time.Duration(0)),
 		bookmarkWatchers: newTimeBucketWatchers(clock),
-		watchBookmarkEnabled: utilfeature.DefaultFeatureGate.Enabled(features.WatchBookmark),
 	}
 
 	// Ensure that timer is stopped.
@@ -516,8 +513,8 @@ func (c *Cacher) Watch(ctx context.Context, key string, resourceVersion string,
 		watcher.forget = forgetWatcher(c, c.watcherIdx, triggerValue, triggerSupported)
 		c.watchers.addWatcher(watcher, c.watcherIdx, triggerValue, triggerSupported)
 
-		// Add it to the queue only when server and client support watch bookmarks.
-		if c.watchBookmarkEnabled && watcher.allowWatchBookmarks {
+		// Add it to the queue only when the client support watch bookmarks.
+		if watcher.allowWatchBookmarks {
 			c.bookmarkWatchers.addWatcher(watcher)
 		}
 		c.watcherIdx++
@@ -790,10 +787,6 @@ func (c *Cacher) processEvent(event *watchCacheEvent) {
 func (c *Cacher) dispatchEvents() {
 	// Jitter to help level out any aggregate load.
 	bookmarkTimer := c.clock.NewTimer(wait.Jitter(time.Second, 0.25))
-	// Stop the timer when watchBookmarkFeatureGate is not enabled.
-	if !c.watchBookmarkEnabled && !bookmarkTimer.Stop() {
-		<-bookmarkTimer.C()
-	}
 	defer bookmarkTimer.Stop()
 
 	lastProcessedResourceVersion := uint64(0)

pkg/storage/cacher/cacher_whitebox_test.go

@@ -658,8 +658,7 @@ func TestCacherNoLeakWithMultipleWatchers(t *testing.T) {
 	}
 }
 
-func testCacherSendBookmarkEvents(t *testing.T, watchCacheEnabled, allowWatchBookmarks, expectedBookmarks bool) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.WatchBookmark, watchCacheEnabled)()
+func testCacherSendBookmarkEvents(t *testing.T, allowWatchBookmarks, expectedBookmarks bool) {
 	backingStorage := &dummyStorage{}
 	cacher, _, err := newTestCacher(backingStorage, 1000)
 	if err != nil {
@@ -729,34 +728,21 @@ func testCacherSendBookmarkEvents(t *testing.T, watchCacheEnabled, allowWatchBoo
 
 func TestCacherSendBookmarkEvents(t *testing.T) {
 	testCases := []struct {
-		watchCacheEnabled   bool
 		allowWatchBookmarks bool
 		expectedBookmarks   bool
 	}{
 		{
-			watchCacheEnabled:   true,
 			allowWatchBookmarks: true,
 			expectedBookmarks:   true,
 		},
 		{
-			watchCacheEnabled:   true,
-			allowWatchBookmarks: false,
-			expectedBookmarks:   false,
-		},
-		{
-			watchCacheEnabled:   false,
-			allowWatchBookmarks: true,
-			expectedBookmarks:   false,
-		},
-		{
-			watchCacheEnabled:   false,
 			allowWatchBookmarks: false,
 			expectedBookmarks:   false,
 		},
 	}
 
 	for _, tc := range testCases {
-		testCacherSendBookmarkEvents(t, tc.watchCacheEnabled, tc.allowWatchBookmarks, tc.expectedBookmarks)
+		testCacherSendBookmarkEvents(t, tc.allowWatchBookmarks, tc.expectedBookmarks)
 	}
 }