Golang v1.IsPodReady函數代碼示例

func (s ActivePods) Less(i, j int) bool {
	// 1. Unassigned < assigned
	// If only one of the pods is unassigned, the unassigned one is smaller
	if s[i].Spec.NodeName != s[j].Spec.NodeName && (len(s[i].Spec.NodeName) == 0 || len(s[j].Spec.NodeName) == 0) {
		return len(s[i].Spec.NodeName) == 0
	}
	// 2. PodPending < PodUnknown < PodRunning
	m := map[v1.PodPhase]int{v1.PodPending: 0, v1.PodUnknown: 1, v1.PodRunning: 2}
	if m[s[i].Status.Phase] != m[s[j].Status.Phase] {
		return m[s[i].Status.Phase] < m[s[j].Status.Phase]
	}
	// 3. Not ready < ready
	// If only one of the pods is not ready, the not ready one is smaller
	if v1.IsPodReady(s[i]) != v1.IsPodReady(s[j]) {
		return !v1.IsPodReady(s[i])
	}
	// TODO: take availability into account when we push minReadySeconds information from deployment into pods,
	//       see https://github.com/kubernetes/kubernetes/issues/22065
	// 4. Been ready for empty time < less time < more time
	// If both pods are ready, the latest ready one is smaller
	if v1.IsPodReady(s[i]) && v1.IsPodReady(s[j]) && !podReadyTime(s[i]).Equal(podReadyTime(s[j])) {
		return afterOrZero(podReadyTime(s[i]), podReadyTime(s[j]))
	}
	// 5. Pods with containers with higher restart counts < lower restart counts
	if maxContainerRestarts(s[i]) != maxContainerRestarts(s[j]) {
		return maxContainerRestarts(s[i]) > maxContainerRestarts(s[j])
	}
	// 6. Empty creation time pods < newer pods < older pods
	if !s[i].CreationTimestamp.Equal(s[j].CreationTimestamp) {
		return afterOrZero(s[i].CreationTimestamp, s[j].CreationTimestamp)
	}
	return false
}

// When a pod is updated, figure out what controller/s manage it and wake them
// up. If the labels of the pod have changed we need to awaken both the old
// and new controller. old and cur must be *v1.Pod types.
func (rm *ReplicationManager) updatePod(old, cur interface{}) {
	curPod := cur.(*v1.Pod)
	oldPod := old.(*v1.Pod)
	if curPod.ResourceVersion == oldPod.ResourceVersion {
		// Periodic resync will send update events for all known pods.
		// Two different versions of the same pod will always have different RVs.
		return
	}
	glog.V(4).Infof("Pod %s updated, objectMeta %+v -> %+v.", curPod.Name, oldPod.ObjectMeta, curPod.ObjectMeta)
	labelChanged := !reflect.DeepEqual(curPod.Labels, oldPod.Labels)
	if curPod.DeletionTimestamp != nil {
		// when a pod is deleted gracefully it's deletion timestamp is first modified to reflect a grace period,
		// and after such time has passed, the kubelet actually deletes it from the store. We receive an update
		// for modification of the deletion timestamp and expect an rc to create more replicas asap, not wait
		// until the kubelet actually deletes the pod. This is different from the Phase of a pod changing, because
		// an rc never initiates a phase change, and so is never asleep waiting for the same.
		rm.deletePod(curPod)
		if labelChanged {
			// we don't need to check the oldPod.DeletionTimestamp because DeletionTimestamp cannot be unset.
			rm.deletePod(oldPod)
		}
		return
	}

	// Only need to get the old controller if the labels changed.
	// Enqueue the oldRC before the curRC to give curRC a chance to adopt the oldPod.
	if labelChanged {
		// If the old and new rc are the same, the first one that syncs
		// will set expectations preventing any damage from the second.
		if oldRC := rm.getPodController(oldPod); oldRC != nil {
			rm.enqueueController(oldRC)
		}
	}

	changedToReady := !v1.IsPodReady(oldPod) && v1.IsPodReady(curPod)
	if curRC := rm.getPodController(curPod); curRC != nil {
		rm.enqueueController(curRC)
		// TODO: MinReadySeconds in the Pod will generate an Available condition to be added in
		// the Pod status which in turn will trigger a requeue of the owning replication controller
		// thus having its status updated with the newly available replica. For now, we can fake the
		// update by resyncing the controller MinReadySeconds after the it is requeued because a Pod
		// transitioned to Ready.
		// Note that this still suffers from #29229, we are just moving the problem one level
		// "closer" to kubelet (from the deployment to the replication controller manager).
		if changedToReady && curRC.Spec.MinReadySeconds > 0 {
			glog.V(2).Infof("ReplicationController %q will be enqueued after %ds for availability check", curRC.Name, curRC.Spec.MinReadySeconds)
			rm.enqueueControllerAfter(curRC, time.Duration(curRC.Spec.MinReadySeconds)*time.Second)
		}
	}
}

func (cc *ConformanceContainer) IsReady() (bool, error) {
	pod, err := cc.PodClient.Get(cc.podName, metav1.GetOptions{})
	if err != nil {
		return false, err
	}
	return v1.IsPodReady(pod), nil
}

func (p *statefulSetTester) scale(ps *apps.StatefulSet, count int32) error {
	name := ps.Name
	ns := ps.Namespace
	p.update(ns, name, func(ps *apps.StatefulSet) { *(ps.Spec.Replicas) = count })

	var petList *v1.PodList
	pollErr := wait.PollImmediate(statefulsetPoll, statefulsetTimeout, func() (bool, error) {
		petList = p.getPodList(ps)
		if int32(len(petList.Items)) == count {
			return true, nil
		}
		return false, nil
	})
	if pollErr != nil {
		unhealthy := []string{}
		for _, pet := range petList.Items {
			delTs, phase, readiness := pet.DeletionTimestamp, pet.Status.Phase, v1.IsPodReady(&pet)
			if delTs != nil || phase != v1.PodRunning || !readiness {
				unhealthy = append(unhealthy, fmt.Sprintf("%v: deletion %v, phase %v, readiness %v", pet.Name, delTs, phase, readiness))
			}
		}
		return fmt.Errorf("Failed to scale statefulset to %d in %v. Remaining pods:\n%v", count, statefulsetTimeout, unhealthy)
	}
	return nil
}

func (p *statefulSetTester) waitForRunning(numPets int32, ps *apps.StatefulSet, shouldBeReady bool) {
	pollErr := wait.PollImmediate(statefulsetPoll, statefulsetTimeout,
		func() (bool, error) {
			podList := p.getPodList(ps)
			if int32(len(podList.Items)) < numPets {
				framework.Logf("Found %d stateful pods, waiting for %d", len(podList.Items), numPets)
				return false, nil
			}
			if int32(len(podList.Items)) > numPets {
				return false, fmt.Errorf("Too many pods scheduled, expected %d got %d", numPets, len(podList.Items))
			}
			for _, p := range podList.Items {
				isReady := v1.IsPodReady(&p)
				desiredReadiness := shouldBeReady == isReady
				framework.Logf("Waiting for pod %v to enter %v - Ready=%v, currently %v - Ready=%v", p.Name, v1.PodRunning, shouldBeReady, p.Status.Phase, isReady)
				if p.Status.Phase != v1.PodRunning || !desiredReadiness {
					return false, nil
				}
			}
			return true, nil
		})
	if pollErr != nil {
		framework.Failf("Failed waiting for pods to enter running: %v", pollErr)
	}
}

func podReadyTime(pod *v1.Pod) metav1.Time {
	if v1.IsPodReady(pod) {
		for _, c := range pod.Status.Conditions {
			// we only care about pod ready conditions
			if c.Type == v1.PodReady && c.Status == v1.ConditionTrue {
				return c.LastTransitionTime
			}
		}
	}
	return metav1.Time{}
}

// PodRunningAndReady returns true if the pod is running and ready, false if the pod has not
// yet reached those states, returns ErrPodCompleted if the pod has run to completion, or
// an error in any other case.
func PodRunningAndReady(event watch.Event) (bool, error) {
	switch event.Type {
	case watch.Deleted:
		return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, "")
	}
	switch t := event.Object.(type) {
	case *v1.Pod:
		switch t.Status.Phase {
		case v1.PodFailed, v1.PodSucceeded:
			return false, ErrPodCompleted
		case v1.PodRunning:
			return v1.IsPodReady(t), nil
		}
	}
	return false, nil
}

func (dsc *DaemonSetsController) updateDaemonSetStatus(ds *extensions.DaemonSet) error {
	glog.V(4).Infof("Updating daemon set status")
	nodeToDaemonPods, err := dsc.getNodesToDaemonPods(ds)
	if err != nil {
		return fmt.Errorf("error getting node to daemon pod mapping for daemon set %#v: %v", ds, err)
	}

	nodeList, err := dsc.nodeStore.List()
	if err != nil {
		return fmt.Errorf("couldn't get list of nodes when updating daemon set %#v: %v", ds, err)
	}

	var desiredNumberScheduled, currentNumberScheduled, numberMisscheduled, numberReady int
	for _, node := range nodeList.Items {
		wantToRun, _, _, err := dsc.nodeShouldRunDaemonPod(&node, ds)
		if err != nil {
			return err
		}

		scheduled := len(nodeToDaemonPods[node.Name]) > 0

		if wantToRun {
			desiredNumberScheduled++
			if scheduled {
				currentNumberScheduled++
				// Sort the daemon pods by creation time, so the the oldest is first.
				daemonPods, _ := nodeToDaemonPods[node.Name]
				sort.Sort(podByCreationTimestamp(daemonPods))
				if v1.IsPodReady(daemonPods[0]) {
					numberReady++
				}
			}
		} else {
			if scheduled {
				numberMisscheduled++
			}
		}
	}

	err = storeDaemonSetStatus(dsc.kubeClient.Extensions().DaemonSets(ds.Namespace), ds, desiredNumberScheduled, currentNumberScheduled, numberMisscheduled, numberReady)
	if err != nil {
		return fmt.Errorf("error storing status for daemon set %#v: %v", ds, err)
	}

	return nil
}

// isHealthy returns true if the pod is ready & running. If the pod has the
// "pod.alpha.kubernetes.io/initialized" annotation set to "false", pod state is ignored.
func (d *defaultPetHealthChecker) isHealthy(pod *v1.Pod) bool {
	if pod == nil || pod.Status.Phase != v1.PodRunning {
		return false
	}
	podReady := v1.IsPodReady(pod)

	// User may have specified a pod readiness override through a debug annotation.
	initialized, ok := pod.Annotations[StatefulSetInitAnnotation]
	if ok {
		if initAnnotation, err := strconv.ParseBool(initialized); err != nil {
			glog.V(4).Infof("Failed to parse %v annotation on pod %v: %v", StatefulSetInitAnnotation, pod.Name, err)
		} else if !initAnnotation {
			glog.V(4).Infof("StatefulSet pod %v waiting on annotation %v", pod.Name, StatefulSetInitAnnotation)
			podReady = initAnnotation
		}
	}
	return podReady
}

func countHealthyPods(pods []*v1.Pod, disruptedPods map[string]metav1.Time, currentTime time.Time) (currentHealthy int32) {
Pod:
	for _, pod := range pods {
		// Pod is beeing deleted.
		if pod.DeletionTimestamp != nil {
			continue
		}
		// Pod is expected to be deleted soon.
		if disruptionTime, found := disruptedPods[pod.Name]; found && disruptionTime.Time.Add(DeletionTimeout).After(currentTime) {
			continue
		}
		if v1.IsPodReady(pod) {
			currentHealthy++
			continue Pod
		}
	}

	return
}

func calculateStatus(rs extensions.ReplicaSet, filteredPods []*v1.Pod, manageReplicasErr error) extensions.ReplicaSetStatus {
	newStatus := rs.Status
	// Count the number of pods that have labels matching the labels of the pod
	// template of the replica set, the matching pods may have more
	// labels than are in the template. Because the label of podTemplateSpec is
	// a superset of the selector of the replica set, so the possible
	// matching pods must be part of the filteredPods.
	fullyLabeledReplicasCount := 0
	readyReplicasCount := 0
	availableReplicasCount := 0
	templateLabel := labels.Set(rs.Spec.Template.Labels).AsSelectorPreValidated()
	for _, pod := range filteredPods {
		if templateLabel.Matches(labels.Set(pod.Labels)) {
			fullyLabeledReplicasCount++
		}
		if v1.IsPodReady(pod) {
			readyReplicasCount++
			if v1.IsPodAvailable(pod, rs.Spec.MinReadySeconds, metav1.Now()) {
				availableReplicasCount++
			}
		}
	}

	failureCond := GetCondition(rs.Status, extensions.ReplicaSetReplicaFailure)
	if manageReplicasErr != nil && failureCond == nil {
		var reason string
		if diff := len(filteredPods) - int(*(rs.Spec.Replicas)); diff < 0 {
			reason = "FailedCreate"
		} else if diff > 0 {
			reason = "FailedDelete"
		}
		cond := NewReplicaSetCondition(extensions.ReplicaSetReplicaFailure, v1.ConditionTrue, reason, manageReplicasErr.Error())
		SetCondition(&newStatus, cond)
	} else if manageReplicasErr == nil && failureCond != nil {
		RemoveCondition(&newStatus, extensions.ReplicaSetReplicaFailure)
	}

	newStatus.Replicas = int32(len(filteredPods))
	newStatus.FullyLabeledReplicas = int32(fullyLabeledReplicasCount)
	newStatus.ReadyReplicas = int32(readyReplicasCount)
	newStatus.AvailableReplicas = int32(availableReplicasCount)
	return newStatus
}

func checkExistingRCRecovers(f *framework.Framework) {
	By("assert that the pre-existing replication controller recovers")
	podClient := f.ClientSet.Core().Pods(f.Namespace.Name)
	rcSelector := labels.Set{"name": "baz"}.AsSelector()

	By("deleting pods from existing replication controller")
	framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
		options := v1.ListOptions{LabelSelector: rcSelector.String()}
		pods, err := podClient.List(options)
		if err != nil {
			framework.Logf("apiserver returned error, as expected before recovery: %v", err)
			return false, nil
		}
		if len(pods.Items) == 0 {
			return false, nil
		}
		for _, pod := range pods.Items {
			err = podClient.Delete(pod.Name, v1.NewDeleteOptions(0))
			Expect(err).NotTo(HaveOccurred())
		}
		framework.Logf("apiserver has recovered")
		return true, nil
	}))

	By("waiting for replication controller to recover")
	framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
		options := v1.ListOptions{LabelSelector: rcSelector.String()}
		pods, err := podClient.List(options)
		Expect(err).NotTo(HaveOccurred())
		for _, pod := range pods.Items {
			if pod.DeletionTimestamp == nil && v1.IsPodReady(&pod) {
				return true, nil
			}
		}
		return false, nil
	}))
}

// GetResourceReplicas calculates the desired replica count based on a target resource utilization percentage
// of the given resource for pods matching the given selector in the given namespace, and the current replica count
func (c *ReplicaCalculator) GetResourceReplicas(currentReplicas int32, targetUtilization int32, resource v1.ResourceName, namespace string, selector labels.Selector) (replicaCount int32, utilization int32, timestamp time.Time, err error) {
	metrics, timestamp, err := c.metricsClient.GetResourceMetric(resource, namespace, selector)
	if err != nil {
		return 0, 0, time.Time{}, fmt.Errorf("unable to get metrics for resource %s: %v", resource, err)
	}

	podList, err := c.podsGetter.Pods(namespace).List(v1.ListOptions{LabelSelector: selector.String()})
	if err != nil {
		return 0, 0, time.Time{}, fmt.Errorf("unable to get pods while calculating replica count: %v", err)
	}

	if len(podList.Items) == 0 {
		return 0, 0, time.Time{}, fmt.Errorf("no pods returned by selector while calculating replica count")
	}

	requests := make(map[string]int64, len(podList.Items))
	readyPodCount := 0
	unreadyPods := sets.NewString()
	missingPods := sets.NewString()

	for _, pod := range podList.Items {
		podSum := int64(0)
		for _, container := range pod.Spec.Containers {
			if containerRequest, ok := container.Resources.Requests[resource]; ok {
				podSum += containerRequest.MilliValue()
			} else {
				return 0, 0, time.Time{}, fmt.Errorf("missing request for %s on container %s in pod %s/%s", resource, container.Name, namespace, pod.Name)
			}
		}

		requests[pod.Name] = podSum

		if pod.Status.Phase != v1.PodRunning || !v1.IsPodReady(&pod) {
			// save this pod name for later, but pretend it doesn't exist for now
			unreadyPods.Insert(pod.Name)
			delete(metrics, pod.Name)
			continue
		}

		if _, found := metrics[pod.Name]; !found {
			// save this pod name for later, but pretend it doesn't exist for now
			missingPods.Insert(pod.Name)
			continue
		}

		readyPodCount++
	}

	if len(metrics) == 0 {
		return 0, 0, time.Time{}, fmt.Errorf("did not receive metrics for any ready pods")
	}

	usageRatio, utilization, err := metricsclient.GetResourceUtilizationRatio(metrics, requests, targetUtilization)
	if err != nil {
		return 0, 0, time.Time{}, err
	}

	rebalanceUnready := len(unreadyPods) > 0 && usageRatio > 1.0
	if !rebalanceUnready && len(missingPods) == 0 {
		if math.Abs(1.0-usageRatio) <= tolerance {
			// return the current replicas if the change would be too small
			return currentReplicas, utilization, timestamp, nil
		}

		// if we don't have any unready or missing pods, we can calculate the new replica count now
		return int32(math.Ceil(usageRatio * float64(readyPodCount))), utilization, timestamp, nil
	}

	if len(missingPods) > 0 {
		if usageRatio < 1.0 {
			// on a scale-down, treat missing pods as using 100% of the resource request
			for podName := range missingPods {
				metrics[podName] = requests[podName]
			}
		} else if usageRatio > 1.0 {
			// on a scale-up, treat missing pods as using 0% of the resource request
			for podName := range missingPods {
				metrics[podName] = 0
			}
		}
	}

	if rebalanceUnready {
		// on a scale-up, treat unready pods as using 0% of the resource request
		for podName := range unreadyPods {
			metrics[podName] = 0
		}
	}

	// re-run the utilization calculation with our new numbers
	newUsageRatio, _, err := metricsclient.GetResourceUtilizationRatio(metrics, requests, targetUtilization)
	if err != nil {
		return 0, utilization, time.Time{}, err
	}

	if math.Abs(1.0-newUsageRatio) <= tolerance || (usageRatio < 1.0 && newUsageRatio > 1.0) || (usageRatio > 1.0 && newUsageRatio < 1.0) {
		// return the current replicas if the change would be too small,
		// or if the new usage ratio would cause a change in scale direction
//.........這裏部分代碼省略.........

			err = wait.PollImmediate(statefulsetPoll, statefulsetTimeout,
				func() (bool, error) {
					podList, err := c.Core().Pods(ns).List(v1.ListOptions{LabelSelector: label.String()})
					if err != nil {
						return false, fmt.Errorf("Unable to get list of pods in statefulset %s", label)
					}
					ExpectNoError(err)
					if len(podList.Items) < numPets {
						framework.Logf("Found %d pets, waiting for %d", len(podList.Items), numPets)
						return false, nil
					}
					if len(podList.Items) > numPets {
						return false, fmt.Errorf("Too many pods scheduled, expected %d got %d", numPets, len(podList.Items))
					}
					for _, p := range podList.Items {
						isReady := v1.IsPodReady(&p)
						if p.Status.Phase != v1.PodRunning || !isReady {
							framework.Logf("Waiting for pod %v to enter %v - Ready=True, currently %v - Ready=%v", p.Name, v1.PodRunning, p.Status.Phase, isReady)
							return false, nil
						}
					}
					return true, nil
				})
			Expect(err).NotTo(HaveOccurred())

			By("Finding each node in the nodetool status lines")
			forEachPod("app", "cassandra", func(pod v1.Pod) {
				output := framework.RunKubectlOrDie("exec", pod.Name, nsFlag, "--", "nodetool", "status")
				matched, _ := regexp.MatchString("UN.*"+pod.Status.PodIP, output)
				if matched != true {
					framework.Failf("Cassandra pod ip %s is not reporting Up and Normal 'UN' via nodetool status", pod.Status.PodIP)

				v1.ObjectMeta{
					Name:            expectedPod.Name,
					ResourceVersion: expectedPod.ResourceVersion,
				},
			))
			Expect(err).NotTo(HaveOccurred())

			By("Verifying the 2nd pod is removed only when it becomes running and ready")
			pst.restoreProbe(ps, testProbe)
			_, err = watch.Until(statefulsetTimeout, watcher, func(event watch.Event) (bool, error) {
				pod := event.Object.(*v1.Pod)
				if event.Type == watch.Deleted && pod.Name == expectedPodName {
					return false, fmt.Errorf("Pod %v was deleted before enter running", pod.Name)
				}
				framework.Logf("Observed event %v for pod %v. Phase %v, Pod is ready %v",
					event.Type, pod.Name, pod.Status.Phase, v1.IsPodReady(pod))
				if pod.Name != expectedPodName {
					return false, nil
				}
				if pod.Status.Phase == v1.PodRunning && v1.IsPodReady(pod) {
					return true, nil
				}
				return false, nil
			})
			Expect(err).NotTo(HaveOccurred())
		})

		It("Scaling should happen in predictable order and halt if any stateful pod is unhealthy", func() {
			psLabels := klabels.Set(labels)
			By("Initializing watcher for selector " + psLabels.String())
			watcher, err := f.ClientSet.Core().Pods(ns).Watch(v1.ListOptions{