Golang pod.IsStaticPod函数代码示例

func TestDoNotDeleteMirrorPods(t *testing.T) {
	staticPod := getTestPod()
	staticPod.Annotations = map[string]string{kubetypes.ConfigSourceAnnotationKey: "file"}
	mirrorPod := getTestPod()
	mirrorPod.UID = "mirror-12345678"
	mirrorPod.Annotations = map[string]string{
		kubetypes.ConfigSourceAnnotationKey: "api",
		kubetypes.ConfigMirrorAnnotationKey: "mirror",
	}
	// Set the deletion timestamp.
	mirrorPod.DeletionTimestamp = new(unversioned.Time)
	client := fake.NewSimpleClientset(mirrorPod)
	m := newTestManager(client)
	m.podManager.AddPod(staticPod)
	m.podManager.AddPod(mirrorPod)
	// Verify setup.
	assert.True(t, kubepod.IsStaticPod(staticPod), "SetUp error: staticPod")
	assert.True(t, kubepod.IsMirrorPod(mirrorPod), "SetUp error: mirrorPod")
	assert.Equal(t, m.podManager.TranslatePodUID(mirrorPod.UID), staticPod.UID)

	status := getRandomPodStatus()
	now := unversioned.Now()
	status.StartTime = &now
	m.SetPodStatus(staticPod, status)

	m.testSyncBatch()
	// Expect not to see an delete action.
	verifyActions(t, m.kubeClient, []core.Action{
		core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: "pods"}},
		core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: "pods", Subresource: "status"}},
	})
}

func TestStaticPodStatus(t *testing.T) {
	staticPod := getTestPod()
	staticPod.Annotations = map[string]string{kubetypes.ConfigSourceAnnotationKey: "file"}
	mirrorPod := getTestPod()
	mirrorPod.UID = "mirror-12345678"
	mirrorPod.Annotations = map[string]string{
		kubetypes.ConfigSourceAnnotationKey: "api",
		kubetypes.ConfigMirrorAnnotationKey: "mirror",
	}
	client := fake.NewSimpleClientset(mirrorPod)
	m := newTestManager(client)
	m.podManager.AddPod(staticPod)
	m.podManager.AddPod(mirrorPod)
	// Verify setup.
	assert.True(t, kubepod.IsStaticPod(staticPod), "SetUp error: staticPod")
	assert.True(t, kubepod.IsMirrorPod(mirrorPod), "SetUp error: mirrorPod")
	assert.Equal(t, m.podManager.TranslatePodUID(mirrorPod.UID), staticPod.UID)

	status := getRandomPodStatus()
	now := unversioned.Now()
	status.StartTime = &now

	m.SetPodStatus(staticPod, status)
	retrievedStatus := expectPodStatus(t, m, staticPod)
	normalizeStatus(&status)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)
	retrievedStatus, _ = m.GetPodStatus(mirrorPod.UID)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)
	// Should translate mirrorPod / staticPod UID.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{
		core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: "pods"}},
		core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: "pods", Subresource: "status"}},
	})
	updateAction := client.Actions()[1].(core.UpdateActionImpl)
	updatedPod := updateAction.Object.(*api.Pod)
	assert.Equal(t, mirrorPod.UID, updatedPod.UID, "Expected mirrorPod (%q), but got %q", mirrorPod.UID, updatedPod.UID)
	assert.True(t, isStatusEqual(&status, &updatedPod.Status), "Expected: %+v, Got: %+v", status, updatedPod.Status)
	client.ClearActions()

	// No changes.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{})

	// Mirror pod identity changes.
	m.podManager.DeletePod(mirrorPod)
	mirrorPod.UID = "new-mirror-pod"
	mirrorPod.Status = api.PodStatus{}
	m.podManager.AddPod(mirrorPod)
	// Expect update to new mirrorPod.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{
		core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: "pods"}},
		core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: "pods", Subresource: "status"}},
	})
	updateAction = client.Actions()[1].(core.UpdateActionImpl)
	updatedPod = updateAction.Object.(*api.Pod)
	assert.Equal(t, mirrorPod.UID, updatedPod.UID, "Expected mirrorPod (%q), but got %q", mirrorPod.UID, updatedPod.UID)
	assert.True(t, isStatusEqual(&status, &updatedPod.Status), "Expected: %+v, Got: %+v", status, updatedPod.Status)
}

// needsReconcile compares the given status with the status in the pod manager (which
// in fact comes from apiserver), returns whether the status needs to be reconciled with
// the apiserver. Now when pod status is inconsistent between apiserver and kubelet,
// kubelet should forcibly send an update to reconclie the inconsistence, because kubelet
// should be the source of truth of pod status.
// NOTE(random-liu): It's simpler to pass in mirror pod uid and get mirror pod by uid, but
// now the pod manager only supports getting mirror pod by static pod, so we have to pass
// static pod uid here.
// TODO(random-liu): Simplify the logic when mirror pod manager is added.
func (m *manager) needsReconcile(uid types.UID, status api.PodStatus) bool {
	// The pod could be a static pod, so we should translate first.
	pod, ok := m.podManager.GetPodByUID(uid)
	if !ok {
		glog.V(4).Infof("Pod %q has been deleted, no need to reconcile", string(uid))
		return false
	}
	// If the pod is a static pod, we should check its mirror pod, because only status in mirror pod is meaningful to us.
	if kubepod.IsStaticPod(pod) {
		mirrorPod, ok := m.podManager.GetMirrorPodByPod(pod)
		if !ok {
			glog.V(4).Infof("Static pod %q has no corresponding mirror pod, no need to reconcile", format.Pod(pod))
			return false
		}
		pod = mirrorPod
	}

	podStatus, err := copyStatus(&pod.Status)
	if err != nil {
		return false
	}
	normalizeStatus(pod, &podStatus)

	if isStatusEqual(&podStatus, &status) {
		// If the status from the source is the same with the cached status,
		// reconcile is not needed. Just return.
		return false
	}
	glog.V(3).Infof("Pod status is inconsistent with cached status for pod %q, a reconciliation should be triggered:\n %+v", format.Pod(pod),
		diff.ObjectDiff(podStatus, status))

	return true
}

func TestStaticPodStatus(t *testing.T) {
	staticPod := *testPod
	staticPod.Annotations = map[string]string{kubetypes.ConfigSourceAnnotationKey: "file"}
	mirrorPod := *testPod
	mirrorPod.UID = "mirror-12345678"
	mirrorPod.Annotations = map[string]string{
		kubetypes.ConfigSourceAnnotationKey: "api",
		kubetypes.ConfigMirrorAnnotationKey: "mirror",
	}
	client := testclient.NewSimpleFake(&mirrorPod)
	m := newTestManager(client)
	m.podManager.AddPod(&staticPod)
	m.podManager.AddPod(&mirrorPod)
	// Verify setup.
	assert.True(t, kubepod.IsStaticPod(&staticPod), "SetUp error: staticPod")
	assert.True(t, kubepod.IsMirrorPod(&mirrorPod), "SetUp error: mirrorPod")
	assert.Equal(t, m.podManager.TranslatePodUID(mirrorPod.UID), staticPod.UID)

	status := getRandomPodStatus()
	now := unversioned.Now()
	status.StartTime = &now

	m.SetPodStatus(&staticPod, status)
	retrievedStatus, _ := m.GetPodStatus(staticPod.UID)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)
	retrievedStatus, _ = m.GetPodStatus(mirrorPod.UID)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)
	// Should translate mirrorPod / staticPod UID.
	m.syncBatch()
	verifyActions(t, m.kubeClient, []testclient.Action{
		testclient.GetActionImpl{ActionImpl: testclient.ActionImpl{Verb: "get", Resource: "pods"}},
		testclient.UpdateActionImpl{ActionImpl: testclient.ActionImpl{Verb: "update", Resource: "pods", Subresource: "status"}},
	})
	updateAction := client.Actions()[1].(testclient.UpdateActionImpl)
	updatedPod := updateAction.Object.(*api.Pod)
	assert.Equal(t, mirrorPod.UID, updatedPod.UID, "Expected mirrorPod (%q), but got %q", mirrorPod.UID, updatedPod.UID)
	assert.True(t, isStatusEqual(&status, &updatedPod.Status), "Expected: %+v, Got: %+v", status, updatedPod.Status)
	client.ClearActions()

	otherPod := &api.Pod{
		ObjectMeta: api.ObjectMeta{
			UID:       "other-87654321",
			Name:      "other",
			Namespace: "new",
		},
	}
	m.podManager.AddPod(otherPod)
	m.SetPodStatus(otherPod, getRandomPodStatus())
	m.syncBatch()
	verifyActions(t, m.kubeClient, []testclient.Action{
		testclient.GetActionImpl{ActionImpl: testclient.ActionImpl{Verb: "get", Resource: "pods"}},
	})
	_, found := m.GetPodStatus(otherPod.UID)
	assert.False(t, found, "otherPod status should have been deleted")
}

func TestStaticPod(t *testing.T) {
	staticPod := getTestPod()
	staticPod.Annotations = map[string]string{kubetypes.ConfigSourceAnnotationKey: "file"}
	mirrorPod := getTestPod()
	mirrorPod.UID = "mirror-12345678"
	mirrorPod.Annotations = map[string]string{
		kubetypes.ConfigSourceAnnotationKey: "api",
		kubetypes.ConfigMirrorAnnotationKey: "mirror",
	}
	client := fake.NewSimpleClientset(mirrorPod)
	m := newTestManager(client)

	// Create the static pod
	m.podManager.AddPod(staticPod)
	assert.True(t, kubepod.IsStaticPod(staticPod), "SetUp error: staticPod")

	status := getRandomPodStatus()
	now := metav1.Now()
	status.StartTime = &now
	m.SetPodStatus(staticPod, status)

	// Should be able to get the static pod status from status manager
	retrievedStatus := expectPodStatus(t, m, staticPod)
	normalizeStatus(staticPod, &status)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)

	// Should not sync pod because there is no corresponding mirror pod for the static pod.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{})
	client.ClearActions()

	// Create the mirror pod
	m.podManager.AddPod(mirrorPod)
	assert.True(t, kubepod.IsMirrorPod(mirrorPod), "SetUp error: mirrorPod")
	assert.Equal(t, m.podManager.TranslatePodUID(mirrorPod.UID), staticPod.UID)

	// Should be able to get the mirror pod status from status manager
	retrievedStatus, _ = m.GetPodStatus(mirrorPod.UID)
	assert.True(t, isStatusEqual(&status, &retrievedStatus), "Expected: %+v, Got: %+v", status, retrievedStatus)

	// Should sync pod because the corresponding mirror pod is created
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{
		core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: schema.GroupVersionResource{Resource: "pods"}}},
		core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: schema.GroupVersionResource{Resource: "pods"}, Subresource: "status"}},
	})
	updateAction := client.Actions()[1].(core.UpdateActionImpl)
	updatedPod := updateAction.Object.(*v1.Pod)
	assert.Equal(t, mirrorPod.UID, updatedPod.UID, "Expected mirrorPod (%q), but got %q", mirrorPod.UID, updatedPod.UID)
	assert.True(t, isStatusEqual(&status, &updatedPod.Status), "Expected: %+v, Got: %+v", status, updatedPod.Status)
	client.ClearActions()

	// Should not sync pod because nothing is changed.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{})

	// Change mirror pod identity.
	m.podManager.DeletePod(mirrorPod)
	mirrorPod.UID = "new-mirror-pod"
	mirrorPod.Status = v1.PodStatus{}
	m.podManager.AddPod(mirrorPod)

	// Should not update to mirror pod, because UID has changed.
	m.testSyncBatch()
	verifyActions(t, m.kubeClient, []core.Action{
		core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: schema.GroupVersionResource{Resource: "pods"}}},
	})
}

//.........这里部分代码省略.........
	nodeConditions := nodeConditions(thresholds)

	// track when a node condition was last observed
	nodeConditionsLastObservedAt := nodeConditionsLastObservedAt(nodeConditions, m.nodeConditionsLastObservedAt, now)

	// node conditions report true if it has been observed within the transition period window
	nodeConditions = nodeConditionsObservedSince(nodeConditionsLastObservedAt, m.config.PressureTransitionPeriod, now)

	// determine the set of thresholds we need to drive eviction behavior (i.e. all grace periods are met)
	thresholds = thresholdsMetGracePeriod(thresholdsFirstObservedAt, now)

	// update internal state
	m.Lock()
	m.nodeConditions = nodeConditions
	m.thresholdsFirstObservedAt = thresholdsFirstObservedAt
	m.nodeConditionsLastObservedAt = nodeConditionsLastObservedAt
	m.thresholdsMet = thresholds
	m.lastObservations = observations
	m.Unlock()

	// determine the set of resources under starvation
	starvedResources := getStarvedResources(thresholds)
	if len(starvedResources) == 0 {
		glog.V(3).Infof("eviction manager: no resources are starved")
		return
	}

	// rank the resources to reclaim by eviction priority
	sort.Sort(byEvictionPriority(starvedResources))
	resourceToReclaim := starvedResources[0]
	glog.Warningf("eviction manager: attempting to reclaim %v", resourceToReclaim)

	// determine if this is a soft or hard eviction associated with the resource
	softEviction := isSoftEvictionThresholds(thresholds, resourceToReclaim)

	// record an event about the resources we are now attempting to reclaim via eviction
	m.recorder.Eventf(m.nodeRef, v1.EventTypeWarning, "EvictionThresholdMet", "Attempting to reclaim %s", resourceToReclaim)

	// check if there are node-level resources we can reclaim to reduce pressure before evicting end-user pods.
	if m.reclaimNodeLevelResources(resourceToReclaim, observations) {
		glog.Infof("eviction manager: able to reduce %v pressure without evicting pods.", resourceToReclaim)
		return
	}

	glog.Infof("eviction manager: must evict pod(s) to reclaim %v", resourceToReclaim)

	// rank the pods for eviction
	rank, ok := m.resourceToRankFunc[resourceToReclaim]
	if !ok {
		glog.Errorf("eviction manager: no ranking function for resource %s", resourceToReclaim)
		return
	}

	// the only candidates viable for eviction are those pods that had anything running.
	activePods := podFunc()
	if len(activePods) == 0 {
		glog.Errorf("eviction manager: eviction thresholds have been met, but no pods are active to evict")
		return
	}

	// rank the running pods for eviction for the specified resource
	rank(activePods, statsFunc)

	glog.Infof("eviction manager: pods ranked for eviction: %s", format.Pods(activePods))

	// we kill at most a single pod during each eviction interval
	for i := range activePods {
		pod := activePods[i]
		if kubepod.IsStaticPod(pod) {
			// The eviction manager doesn't evict static pods. To stop a static
			// pod, the admin needs to remove the manifest from kubelet's
			// --config directory.
			// TODO(39124): This is a short term fix, we can't assume static pods
			// are always well behaved.
			glog.Infof("eviction manager: NOT evicting static pod %v", pod.Name)
			continue
		}
		status := v1.PodStatus{
			Phase:   v1.PodFailed,
			Message: fmt.Sprintf(message, resourceToReclaim),
			Reason:  reason,
		}
		// record that we are evicting the pod
		m.recorder.Eventf(pod, v1.EventTypeWarning, reason, fmt.Sprintf(message, resourceToReclaim))
		gracePeriodOverride := int64(0)
		if softEviction {
			gracePeriodOverride = m.config.MaxPodGracePeriodSeconds
		}
		// this is a blocking call and should only return when the pod and its containers are killed.
		err := m.killPodFunc(pod, status, &gracePeriodOverride)
		if err != nil {
			glog.Infof("eviction manager: pod %s failed to evict %v", format.Pod(pod), err)
			continue
		}
		// success, so we return until the next housekeeping interval
		glog.Infof("eviction manager: pod %s evicted successfully", format.Pod(pod))
		return
	}
	glog.Infof("eviction manager: unable to evict any pods from the node")
}