Merge pull request kubernetes#21120 from Random-Liu/minor-probe-manager-refactor

Auto commit by PR queue bot

Author: k8s-merge-robot

pkg/kubelet/dockertools/manager_test.go

@@ -867,7 +867,7 @@ func TestSyncPodsUnhealthy(t *testing.T) {
 			ID:   infraContainerID,
 			Name: "/k8s_POD." + strconv.FormatUint(generatePodInfraContainerHash(pod), 16) + "_foo_new_12345678_42",
 		}})
-	dm.livenessManager.Set(kubecontainer.DockerID(unhealthyContainerID).ContainerID(), proberesults.Failure, nil)
+	dm.livenessManager.Set(kubecontainer.DockerID(unhealthyContainerID).ContainerID(), proberesults.Failure, pod)
 
 	runSyncPod(t, dm, fakeDocker, pod, nil, false)
 

pkg/kubelet/kubelet.go

@@ -2349,11 +2349,7 @@ func (kl *Kubelet) syncLoopIteration(updates <-chan kubetypes.PodUpdate, handler
 		if update.Result == proberesults.Failure {
 			// We should not use the pod from livenessManager, because it is never updated after
 			// initialization.
-			// TODO(random-liu): This is just a quick fix. We should:
-			//  * Just pass pod UID in probe updates to make this less confusing.
-			//  * Maybe probe manager should rely on pod manager, or at least the pod in probe manager
-			//  should be updated.
-			pod, ok := kl.podManager.GetPodByUID(update.Pod.UID)
+			pod, ok := kl.podManager.GetPodByUID(update.PodUID)
 			if !ok {
 				// If the pod no longer exists, ignore the update.
 				glog.V(4).Infof("SyncLoop (container unhealthy): ignore irrelevant update: %#v", update)

pkg/kubelet/prober/manager.go

@@ -33,7 +33,7 @@ import (
 
 // Manager manages pod probing. It creates a probe "worker" for every container that specifies a
 // probe (AddPod). The worker periodically probes its assigned container and caches the results. The
-// manager usse the cached probe results to set the appropriate Ready state in the PodStatus when
+// manager use the cached probe results to set the appropriate Ready state in the PodStatus when
 // requested (UpdatePodStatus). Updating probe parameters is not currently supported.
 // TODO: Move liveness probing out of the runtime, to here.
 type Manager interface {
@@ -234,5 +234,5 @@ func (m *manager) updateReadiness() {
 	update := <-m.readinessManager.Updates()
 
 	ready := update.Result == results.Success
-	m.statusManager.SetContainerReadiness(update.Pod, update.ContainerID, ready)
+	m.statusManager.SetContainerReadiness(update.PodUID, update.ContainerID, ready)
 }

pkg/kubelet/prober/manager_test.go

@@ -280,7 +280,8 @@ func TestUpdatePodStatus(t *testing.T) {
 }
 
 func TestUpdateReadiness(t *testing.T) {
-	testPod := getTestPod(readiness, api.Probe{})
+	testPod := getTestPod()
+	setTestProbe(testPod, readiness, api.Probe{})
 	m := newTestManager()
 	defer cleanup(t, m)
 
@@ -297,9 +298,9 @@ func TestUpdateReadiness(t *testing.T) {
 	exec.set(probe.Success, nil)
 	m.prober.exec = &exec
 
-	m.statusManager.SetPodStatus(&testPod, getTestRunningStatus())
+	m.statusManager.SetPodStatus(testPod, getTestRunningStatus())
 
-	m.AddPod(&testPod)
+	m.AddPod(testPod)
 	probePaths := []probeKey{{testPodUID, testContainerName, readiness}}
 	if err := expectProbes(m, probePaths); err != nil {
 		t.Error(err)

pkg/kubelet/prober/results/results_manager.go

@@ -21,6 +21,7 @@ import (
 
 	"k8s.io/kubernetes/pkg/api"
 	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
+	"k8s.io/kubernetes/pkg/types"
 )
 
 // Manager provides a probe results cache and channel of updates.
@@ -61,7 +62,7 @@ func (r Result) String() string {
 type Update struct {
 	ContainerID kubecontainer.ContainerID
 	Result      Result
-	Pod         *api.Pod
+	PodUID      types.UID
 }
 
 // Manager implementation.
@@ -93,7 +94,7 @@ func (m *manager) Get(id kubecontainer.ContainerID) (Result, bool) {
 
 func (m *manager) Set(id kubecontainer.ContainerID, result Result, pod *api.Pod) {
 	if m.setInternal(id, result) {
-		m.updates <- Update{id, result, pod}
+		m.updates <- Update{id, result, pod.UID}
 	}
 }
 

pkg/kubelet/prober/results/results_manager_test.go

@@ -35,7 +35,7 @@ func TestCacheOperations(t *testing.T) {
 	_, found := m.Get(unsetID)
 	assert.False(t, found, "unset result found")
 
-	m.Set(setID, Success, nil)
+	m.Set(setID, Success, &api.Pod{})
 	result, found := m.Get(setID)
 	assert.True(t, result == Success, "set result")
 	assert.True(t, found, "set result found")
@@ -77,10 +77,10 @@ func TestUpdates(t *testing.T) {
 
 	// New result should always push an update.
 	m.Set(fooID, Success, pod)
-	expectUpdate(Update{fooID, Success, pod}, "new success")
+	expectUpdate(Update{fooID, Success, pod.UID}, "new success")
 
 	m.Set(barID, Failure, pod)
-	expectUpdate(Update{barID, Failure, pod}, "new failure")
+	expectUpdate(Update{barID, Failure, pod.UID}, "new failure")
 
 	// Unchanged results should not send an update.
 	m.Set(fooID, Success, pod)
@@ -91,8 +91,8 @@ func TestUpdates(t *testing.T) {
 
 	// Changed results should send an update.
 	m.Set(fooID, Failure, pod)
-	expectUpdate(Update{fooID, Failure, pod}, "changed foo")
+	expectUpdate(Update{fooID, Failure, pod.UID}, "changed foo")
 
 	m.Set(barID, Success, pod)
-	expectUpdate(Update{barID, Success, pod}, "changed bar")
+	expectUpdate(Update{barID, Success, pod.UID}, "changed bar")
 }

pkg/kubelet/prober/testing.go

@@ -52,11 +52,22 @@ func getTestRunningStatus() api.PodStatus {
 	return podStatus
 }
 
-func getTestPod(probeType probeType, probeSpec api.Probe) api.Pod {
+func getTestPod() *api.Pod {
 	container := api.Container{
 		Name: testContainerName,
 	}
+	pod := api.Pod{
+		Spec: api.PodSpec{
+			Containers:    []api.Container{container},
+			RestartPolicy: api.RestartPolicyNever,
+		},
+	}
+	pod.Name = "testPod"
+	pod.UID = testPodUID
+	return &pod
+}
 
+func setTestProbe(pod *api.Pod, probeType probeType, probeSpec api.Probe) {
 	// All tests rely on the fake exec prober.
 	probeSpec.Handler = api.Handler{
 		Exec: &api.ExecAction{},
@@ -78,26 +89,20 @@ func getTestPod(probeType probeType, probeSpec api.Probe) api.Pod {
 
 	switch probeType {
 	case readiness:
-		container.ReadinessProbe = &probeSpec
+		pod.Spec.Containers[0].ReadinessProbe = &probeSpec
 	case liveness:
-		container.LivenessProbe = &probeSpec
+		pod.Spec.Containers[0].LivenessProbe = &probeSpec
 	}
-	pod := api.Pod{
-		Spec: api.PodSpec{
-			Containers:    []api.Container{container},
-			RestartPolicy: api.RestartPolicyNever,
-		},
-	}
-	pod.Name = "testPod"
-	pod.UID = testPodUID
-	return pod
 }
 
 func newTestManager() *manager {
 	refManager := kubecontainer.NewRefManager()
 	refManager.SetRef(testContainerID, &api.ObjectReference{}) // Suppress prober warnings.
+	podManager := kubepod.NewBasicPodManager(nil)
+	// Add test pod to pod manager, so that status manager can get the pod from pod manager if needed.
+	podManager.AddPod(getTestPod())
 	m := NewManager(
-		status.NewManager(&fake.Clientset{}, kubepod.NewBasicPodManager(nil)),
+		status.NewManager(&fake.Clientset{}, podManager),
 		results.NewManager(),
 		nil, // runner
 		refManager,
@@ -109,8 +114,9 @@ func newTestManager() *manager {
 }
 
 func newTestWorker(m *manager, probeType probeType, probeSpec api.Probe) *worker {
-	pod := getTestPod(probeType, probeSpec)
-	return newWorker(m, probeType, &pod, pod.Spec.Containers[0])
+	pod := getTestPod()
+	setTestProbe(pod, probeType, probeSpec)
+	return newWorker(m, probeType, pod, pod.Spec.Containers[0])
 }
 
 type fakeExecProber struct {

pkg/kubelet/status/manager.go

@@ -81,7 +81,7 @@ type Manager interface {
 
 	// SetContainerReadiness updates the cached container status with the given readiness, and
 	// triggers a status update.
-	SetContainerReadiness(pod *api.Pod, containerID kubecontainer.ContainerID, ready bool)
+	SetContainerReadiness(podUID types.UID, containerID kubecontainer.ContainerID, ready bool)
 
 	// TerminatePods resets the container status for the provided pods to terminated and triggers
 	// a status update. This function may not enqueue all the provided pods, in which case it will
@@ -150,10 +150,16 @@ func (m *manager) SetPodStatus(pod *api.Pod, status api.PodStatus) {
 	m.updateStatusInternal(pod, status)
 }
 
-func (m *manager) SetContainerReadiness(pod *api.Pod, containerID kubecontainer.ContainerID, ready bool) {
+func (m *manager) SetContainerReadiness(podUID types.UID, containerID kubecontainer.ContainerID, ready bool) {
 	m.podStatusesLock.Lock()
 	defer m.podStatusesLock.Unlock()
 
+	pod, ok := m.podManager.GetPodByUID(podUID)
+	if !ok {
+		glog.V(4).Infof("Pod %q has been deleted, no need to update readiness", string(podUID))
+		return
+	}
+
 	oldStatus, found := m.podStatuses[pod.UID]
 	if !found {
 		glog.Warningf("Container readiness changed before pod has synced: %q - %q",

pkg/kubelet/status/manager_test.go

@@ -578,9 +578,11 @@ func TestSetContainerReadiness(t *testing.T) {
 	}
 
 	m := newTestManager(&fake.Clientset{})
+	// Add test pod because the container spec has been changed.
+	m.podManager.AddPod(pod)
 
 	t.Log("Setting readiness before status should fail.")
-	m.SetContainerReadiness(pod, cID1, true)
+	m.SetContainerReadiness(pod.UID, cID1, true)
 	verifyUpdates(t, m, 0)
 	if status, ok := m.GetPodStatus(pod.UID); ok {
 		t.Errorf("Unexpected PodStatus: %+v", status)
@@ -593,25 +595,25 @@ func TestSetContainerReadiness(t *testing.T) {
 	verifyReadiness("initial", &status, false, false, false)
 
 	t.Log("Setting unchanged readiness should do nothing.")
-	m.SetContainerReadiness(pod, cID1, false)
+	m.SetContainerReadiness(pod.UID, cID1, false)
 	verifyUpdates(t, m, 0)
 	status = expectPodStatus(t, m, pod)
 	verifyReadiness("unchanged", &status, false, false, false)
 
 	t.Log("Setting container readiness should generate update but not pod readiness.")
-	m.SetContainerReadiness(pod, cID1, true)
+	m.SetContainerReadiness(pod.UID, cID1, true)
 	verifyUpdates(t, m, 1)
 	status = expectPodStatus(t, m, pod)
 	verifyReadiness("c1 ready", &status, true, false, false)
 
 	t.Log("Setting both containers to ready should update pod readiness.")
-	m.SetContainerReadiness(pod, cID2, true)
+	m.SetContainerReadiness(pod.UID, cID2, true)
 	verifyUpdates(t, m, 1)
 	status = expectPodStatus(t, m, pod)
 	verifyReadiness("all ready", &status, true, true, true)
 
 	t.Log("Setting non-existant container readiness should fail.")
-	m.SetContainerReadiness(pod, kubecontainer.ContainerID{"test", "foo"}, true)
+	m.SetContainerReadiness(pod.UID, kubecontainer.ContainerID{"test", "foo"}, true)
 	verifyUpdates(t, m, 0)
 	status = expectPodStatus(t, m, pod)
 	verifyReadiness("ignore non-existant", &status, true, true, true)