Merge pull request #43016 from liggitt/time-added-pointer

Automatic merge from submit-queue (batch tested with PRs 43016, 50503, 51281, 51518, 51582). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>..

Omit timeAdded from taint when empty

Fixes omitempty portion of https://github.com/kubernetes/kubernetes/issues/42394

pkg/controller/node/scheduler/taint_controller_test.go

@@ -33,11 +33,12 @@ import (
 var timeForControllerToProgress = 500 * time.Millisecond
 
 func createNoExecuteTaint(index int) v1.Taint {
+	now := metav1.Now()
 	return v1.Taint{
 		Key:       "testTaint" + fmt.Sprintf("%v", index),
 		Value:     "test" + fmt.Sprintf("%v", index),
 		Effect:    v1.TaintEffectNoExecute,
-		TimeAdded: metav1.Now(),
+		TimeAdded: &now,
 	}
 }
 

pkg/controller/node/util/controller_utils.go

@@ -256,7 +256,8 @@ func RecordNodeStatusChange(recorder record.EventRecorder, node *v1.Node, newSta
 // otherwise.
 func SwapNodeControllerTaint(kubeClient clientset.Interface, taintsToAdd, taintsToRemove []*v1.Taint, node *v1.Node) bool {
 	for _, taintToAdd := range taintsToAdd {
-		taintToAdd.TimeAdded = metav1.Now()
+		now := metav1.Now()
+		taintToAdd.TimeAdded = &now
 	}
 
 	err := controller.AddOrUpdateTaintOnNode(kubeClient, node.Name, taintsToAdd...)