func TestDeleteControllerAndExpectations(t *testing.T) {
client := client.NewOrDie(&client.Config{Host: "", Version: testapi.Default.Version()})
manager := NewReplicationManager(client, controller.NoResyncPeriodFunc, 10)
manager.podStoreSynced = alwaysReady
rc := newReplicationController(1)
manager.rcStore.Store.Add(rc)
fakePodControl := controller.FakePodControl{}
manager.podControl = &fakePodControl
// This should set expectations for the rc
manager.syncReplicationController(getKey(rc, t))
validateSyncReplication(t, &fakePodControl, 1, 0)
fakePodControl.Clear()
// Get the RC key
rcKey, err := controller.KeyFunc(rc)
if err != nil {
t.Errorf("Couldn't get key for object %+v: %v", rc, err)
}
// This is to simulate a concurrent addPod, that has a handle on the expectations
// as the controller deletes it.
podExp, exists, err := manager.expectations.GetExpectations(rcKey)
if !exists || err != nil {
t.Errorf("No expectations found for rc")
}
manager.rcStore.Delete(rc)
manager.syncReplicationController(getKey(rc, t))
if _, exists, err = manager.expectations.GetExpectations(rcKey); exists {
t.Errorf("Found expectaions, expected none since the rc has been deleted.")
}
// This should have no effect, since we've deleted the rc.
podExp.Seen(1, 0)
manager.podStore.Store.Replace(make([]interface{}, 0), "0")
manager.syncReplicationController(getKey(rc, t))
validateSyncReplication(t, &fakePodControl, 0, 0)
}
func TestSyncReplicationControllerDormancy(t *testing.T) {
// Setup a test server so we can lie about the current state of pods
fakeHandler := util.FakeHandler{
StatusCode: 200,
ResponseBody: "",
}
testServer := httptest.NewServer(&fakeHandler)
defer testServer.Close()
client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Default.Version()})
fakePodControl := controller.FakePodControl{}
manager := NewReplicationManager(client, controller.NoResyncPeriodFunc, BurstReplicas)
manager.podStoreSynced = alwaysReady
manager.podControl = &fakePodControl
controllerSpec := newReplicationController(2)
manager.rcStore.Store.Add(controllerSpec)
newPodList(manager.podStore.Store, 1, api.PodRunning, controllerSpec)
// Creates a replica and sets expectations
controllerSpec.Status.Replicas = 1
manager.syncReplicationController(getKey(controllerSpec, t))
validateSyncReplication(t, &fakePodControl, 1, 0)
// Expectations prevents replicas but not an update on status
controllerSpec.Status.Replicas = 0
fakePodControl.Clear()
manager.syncReplicationController(getKey(controllerSpec, t))
validateSyncReplication(t, &fakePodControl, 0, 0)
// Get the key for the controller
rcKey, err := controller.KeyFunc(controllerSpec)
if err != nil {
t.Errorf("Couldn't get key for object %+v: %v", controllerSpec, err)
}
// Lowering expectations should lead to a sync that creates a replica, however the
// fakePodControl error will prevent this, leaving expectations at 0, 0
manager.expectations.CreationObserved(rcKey)
controllerSpec.Status.Replicas = 1
fakePodControl.Clear()
fakePodControl.Err = fmt.Errorf("Fake Error")
manager.syncReplicationController(getKey(controllerSpec, t))
validateSyncReplication(t, &fakePodControl, 0, 0)
// This replica should not need a Lowering of expectations, since the previous create failed
fakePodControl.Err = nil
manager.syncReplicationController(getKey(controllerSpec, t))
validateSyncReplication(t, &fakePodControl, 1, 0)
// 1 PUT for the rc status during dormancy window.
// Note that the pod creates go through pod control so they're not recorded.
fakeHandler.ValidateRequestCount(t, 1)
}
func doTestControllerBurstReplicas(t *testing.T, burstReplicas, numReplicas int) {
client := client.NewOrDie(&client.Config{Host: "", Version: testapi.Default.Version()})
fakePodControl := controller.FakePodControl{}
manager := NewReplicationManager(client, controller.NoResyncPeriodFunc, burstReplicas)
manager.podStoreSynced = alwaysReady
manager.podControl = &fakePodControl
controllerSpec := newReplicationController(numReplicas)
manager.rcStore.Store.Add(controllerSpec)
expectedPods := 0
pods := newPodList(nil, numReplicas, api.PodPending, controllerSpec)
rcKey, err := controller.KeyFunc(controllerSpec)
if err != nil {
t.Errorf("Couldn't get key for object %+v: %v", controllerSpec, err)
}
// Size up the controller, then size it down, and confirm the expected create/delete pattern
for _, replicas := range []int{numReplicas, 0} {
controllerSpec.Spec.Replicas = replicas
manager.rcStore.Store.Add(controllerSpec)
for i := 0; i < numReplicas; i += burstReplicas {
manager.syncReplicationController(getKey(controllerSpec, t))
// The store accrues active pods. It's also used by the rc to determine how many
// replicas to create.
activePods := len(manager.podStore.Store.List())
if replicas != 0 {
// This is the number of pods currently "in flight". They were created by the rc manager above,
// which then puts the rc to sleep till all of them have been observed.
expectedPods = replicas - activePods
if expectedPods > burstReplicas {
expectedPods = burstReplicas
}
// This validates the rc manager sync actually created pods
validateSyncReplication(t, &fakePodControl, expectedPods, 0)
// This simulates the watch events for all but 1 of the expected pods.
// None of these should wake the controller because it has expectations==BurstReplicas.
for i := 0; i < expectedPods-1; i++ {
manager.podStore.Store.Add(&pods.Items[i])
manager.addPod(&pods.Items[i])
}
podExp, exists, err := manager.expectations.GetExpectations(rcKey)
if !exists || err != nil {
t.Fatalf("Did not find expectations for rc.")
}
if add, _ := podExp.GetExpectations(); add != 1 {
t.Fatalf("Expectations are wrong %v", podExp)
}
} else {
expectedPods = (replicas - activePods) * -1
if expectedPods > burstReplicas {
expectedPods = burstReplicas
}
validateSyncReplication(t, &fakePodControl, 0, expectedPods)
for i := 0; i < expectedPods-1; i++ {
manager.podStore.Store.Delete(&pods.Items[i])
manager.deletePod(&pods.Items[i])
}
podExp, exists, err := manager.expectations.GetExpectations(rcKey)
if !exists || err != nil {
t.Fatalf("Did not find expectations for rc.")
}
if _, del := podExp.GetExpectations(); del != 1 {
t.Fatalf("Expectations are wrong %v", podExp)
}
}
// Check that the rc didn't take any action for all the above pods
fakePodControl.Clear()
manager.syncReplicationController(getKey(controllerSpec, t))
validateSyncReplication(t, &fakePodControl, 0, 0)
// Create/Delete the last pod
// The last add pod will decrease the expectation of the rc to 0,
// which will cause it to create/delete the remaining replicas up to burstReplicas.
if replicas != 0 {
manager.podStore.Store.Add(&pods.Items[expectedPods-1])
manager.addPod(&pods.Items[expectedPods-1])
} else {
manager.podStore.Store.Delete(&pods.Items[expectedPods-1])
manager.deletePod(&pods.Items[expectedPods-1])
}
pods.Items = pods.Items[expectedPods:]
}
// Confirm that we've created the right number of replicas
activePods := len(manager.podStore.Store.List())
if activePods != controllerSpec.Spec.Replicas {
t.Fatalf("Unexpected number of active pods, expected %d, got %d", controllerSpec.Spec.Replicas, activePods)
}
// Replenish the pod list, since we cut it down sizing up
pods = newPodList(nil, replicas, api.PodRunning, controllerSpec)
}
}