Add a test that reproduces the race condition between setting nominated node…

test/integration/scheduler/util.go

@@ -589,6 +589,17 @@ func podScheduled(c clientset.Interface, podNamespace, podName string) wait.Cond
 
 // podUnschedulable returns a condition function that returns true if the given pod
 // gets unschedulable status.
+func podSchedulableCondition(c clientset.Interface, podNamespace, podName string) (*v1.PodCondition, error) {
+	pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
+	if err != nil {
+		return nil, err
+	}
+	_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
+	return cond, nil
+}
+
+// podUnschedulable returns a condition function that returns true if the given pod
+// gets unschedulable status.
 func podUnschedulable(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
 	return func() (bool, error) {
 		pod, err := c.CoreV1().Pods(podNamespace).Get(podName, metav1.GetOptions{})
@@ -696,7 +707,7 @@ func cleanupPods(cs clientset.Interface, t *testing.T, pods []*v1.Pod) {
 		}
 	}
 	for _, p := range pods {
-		if err := wait.Poll(time.Second, wait.ForeverTestTimeout,
+		if err := wait.Poll(time.Millisecond, wait.ForeverTestTimeout,
 			podDeleted(cs, p.Namespace, p.Name)); err != nil {
 			t.Errorf("error while waiting for pod  %v/%v to get deleted: %v", p.Namespace, p.Name, err)
 		}