// This test simulates the case where an object is created with an owner that
// doesn't exist. It verifies the GC will delete such an object.
func TestCreateWithNonExistentOwner(t *testing.T) {
s, gc, clientSet := setup(t)
defer s.Close()
ns := framework.CreateTestingNamespace("gc-non-existing-owner", s, t)
defer framework.DeleteTestingNamespace(ns, s, t)
podClient := clientSet.Core().Pods(ns.Name)
pod := newPod(garbageCollectedPodName, ns.Name, []metav1.OwnerReference{{UID: "doesn't matter", Name: toBeDeletedRCName}})
_, err := podClient.Create(pod)
if err != nil {
t.Fatalf("Failed to create Pod: %v", err)
}
// set up watch
pods, err := podClient.List(v1.ListOptions{})
if err != nil {
t.Fatalf("Failed to list pods: %v", err)
}
if len(pods.Items) != 1 {
t.Fatalf("Expect only 1 pod")
}
stopCh := make(chan struct{})
go gc.Run(5, stopCh)
defer close(stopCh)
// wait for the garbage collector to delete the pod
if err := integration.WaitForPodToDisappear(podClient, garbageCollectedPodName, 5*time.Second, 30*time.Second); err != nil {
t.Fatalf("expect pod %s to be garbage collected, got err= %v", garbageCollectedPodName, err)
}
}
// This test simulates the cascading deletion.
func TestCascadingDeletion(t *testing.T) {
glog.V(6).Infof("TestCascadingDeletion starts")
defer glog.V(6).Infof("TestCascadingDeletion ends")
s, gc, clientSet := setup(t)
defer s.Close()
ns := framework.CreateTestingNamespace("gc-cascading-deletion", s, t)
defer framework.DeleteTestingNamespace(ns, s, t)
rcClient := clientSet.Core().ReplicationControllers(ns.Name)
podClient := clientSet.Core().Pods(ns.Name)
toBeDeletedRC, err := rcClient.Create(newOwnerRC(toBeDeletedRCName, ns.Name))
if err != nil {
t.Fatalf("Failed to create replication controller: %v", err)
}
remainingRC, err := rcClient.Create(newOwnerRC(remainingRCName, ns.Name))
if err != nil {
t.Fatalf("Failed to create replication controller: %v", err)
}
rcs, err := rcClient.List(v1.ListOptions{})
if err != nil {
t.Fatalf("Failed to list replication controllers: %v", err)
}
if len(rcs.Items) != 2 {
t.Fatalf("Expect only 2 replication controller")
}
// this pod should be cascadingly deleted.
pod := newPod(garbageCollectedPodName, ns.Name, []metav1.OwnerReference{{UID: toBeDeletedRC.ObjectMeta.UID, Name: toBeDeletedRCName}})
_, err = podClient.Create(pod)
if err != nil {
t.Fatalf("Failed to create Pod: %v", err)
}
// this pod shouldn't be cascadingly deleted, because it has a valid reference.
pod = newPod(oneValidOwnerPodName, ns.Name, []metav1.OwnerReference{
{UID: toBeDeletedRC.ObjectMeta.UID, Name: toBeDeletedRCName},
{UID: remainingRC.ObjectMeta.UID, Name: remainingRCName},
})
_, err = podClient.Create(pod)
if err != nil {
t.Fatalf("Failed to create Pod: %v", err)
}
// this pod shouldn't be cascadingly deleted, because it doesn't have an owner.
pod = newPod(independentPodName, ns.Name, []metav1.OwnerReference{})
_, err = podClient.Create(pod)
if err != nil {
t.Fatalf("Failed to create Pod: %v", err)
}
// set up watch
pods, err := podClient.List(v1.ListOptions{})
if err != nil {
t.Fatalf("Failed to list pods: %v", err)
}
if len(pods.Items) != 3 {
t.Fatalf("Expect only 3 pods")
}
stopCh := make(chan struct{})
go gc.Run(5, stopCh)
defer close(stopCh)
// delete one of the replication controller
if err := rcClient.Delete(toBeDeletedRCName, getNonOrphanOptions()); err != nil {
t.Fatalf("failed to delete replication controller: %v", err)
}
// sometimes the deletion of the RC takes long time to be observed by
// the gc, so wait for the garbage collector to observe the deletion of
// the toBeDeletedRC
if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
return !gc.GraphHasUID([]types.UID{toBeDeletedRC.ObjectMeta.UID}), nil
}); err != nil {
t.Fatal(err)
}
if err := integration.WaitForPodToDisappear(podClient, garbageCollectedPodName, 5*time.Second, 30*time.Second); err != nil {
t.Fatalf("expect pod %s to be garbage collected, got err= %v", garbageCollectedPodName, err)
}
// checks the garbage collect doesn't delete pods it shouldn't delete.
if _, err := podClient.Get(independentPodName, metav1.GetOptions{}); err != nil {
t.Fatal(err)
}
if _, err := podClient.Get(oneValidOwnerPodName, metav1.GetOptions{}); err != nil {
t.Fatal(err)
}
}
