Golang api.PodList类代码示例

// encodePods creates an api.PodList object from pods and returns the encoded
// PodList.
func encodePods(pods []*api.Pod) (data []byte, err error) {
	podList := new(api.PodList)
	for _, pod := range pods {
		podList.Items = append(podList.Items, *pod)
	}
	return latest.GroupOrDie("").Codec.Encode(podList)
}

// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
func (s storePodsNamespacer) List(selector labels.Selector) (api.PodList, error) {
	pods := api.PodList{}

	if s.namespace == api.NamespaceAll {
		for _, m := range s.indexer.List() {
			pod := m.(*api.Pod)
			if selector.Matches(labels.Set(pod.Labels)) {
				pods.Items = append(pods.Items, *pod)
			}
		}
		return pods, nil
	}

	key := &api.Pod{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
	items, err := s.indexer.Index(NamespaceIndex, key)
	if err != nil {
		// Ignore error; do slow search without index.
		glog.Warningf("can not retrieve list of objects using index : %v", err)
		for _, m := range s.indexer.List() {
			pod := m.(*api.Pod)
			if s.namespace == pod.Namespace && selector.Matches(labels.Set(pod.Labels)) {
				pods.Items = append(pods.Items, *pod)
			}
		}
		return pods, nil
	}
	for _, m := range items {
		pod := m.(*api.Pod)
		if selector.Matches(labels.Set(pod.Labels)) {
			pods.Items = append(pods.Items, *pod)
		}
	}
	return pods, nil
}

func newPodList(names ...string) api.PodList {
	var list api.PodList
	for _, name := range names {
		list.Items = append(list.Items, newPod(name))
	}
	return list
}

// encodePods creates an api.PodList object from pods and returns the encoded
// PodList.
func encodePods(pods []*api.Pod) (data []byte, err error) {
	podList := new(api.PodList)
	for _, pod := range pods {
		podList.Items = append(podList.Items, *pod)
	}
	// TODO: this needs to be parameterized to the kubelet, not hardcoded. Depends on Kubelet
	//   as API server refactor.
	// TODO: Locked to v1, needs to be made generic
	codec := api.Codecs.LegacyCodec(unversioned.GroupVersion{Group: api.GroupName, Version: "v1"})
	return runtime.Encode(codec, podList)
}

func (dc *DeploymentController) listPods(deployment *extensions.Deployment) (*api.PodList, error) {
	return deploymentutil.ListPods(deployment,
		func(namespace string, options api.ListOptions) (*api.PodList, error) {
			pods, err := dc.podLister.Pods(namespace).List(options.LabelSelector)
			result := api.PodList{Items: make([]api.Pod, 0, len(pods))}
			for i := range pods {
				result.Items = append(result.Items, *pods[i])
			}
			return &result, err
		})
}

// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
func (s storePodsNamespacer) List(selector labels.Selector) (pods api.PodList, err error) {
	list := api.PodList{}
	for _, m := range s.store.List() {
		pod := m.(*api.Pod)
		if s.namespace == api.NamespaceAll || s.namespace == pod.Namespace {
			if selector.Matches(labels.Set(pod.Labels)) {
				list.Items = append(list.Items, *pod)
			}
		}
	}
	return list, nil
}

// addHashKeyToRSAndPods adds pod-template-hash information to the given rs, if it's not already there, with the following steps:
// 1. Add hash label to the rs's pod template, and make sure the controller sees this update so that no orphaned pods will be created
// 2. Add hash label to all pods this rs owns, wait until replicaset controller reports rs.Status.FullyLabeledReplicas equal to the desired number of replicas
// 3. Add hash label to the rs's label and selector
func (dc *DeploymentController) addHashKeyToRSAndPods(rs *extensions.ReplicaSet) (updatedRS *extensions.ReplicaSet, err error) {
	objCopy, err := api.Scheme.Copy(rs)
	if err != nil {
		return nil, err
	}
	updatedRS = objCopy.(*extensions.ReplicaSet)

	// If the rs already has the new hash label in its selector, it's done syncing
	if labelsutil.SelectorHasLabel(rs.Spec.Selector, extensions.DefaultDeploymentUniqueLabelKey) {
		return
	}
	namespace := rs.Namespace
	hash := rsutil.GetPodTemplateSpecHash(rs)
	rsUpdated := false
	// 1. Add hash template label to the rs. This ensures that any newly created pods will have the new label.
	updatedRS, rsUpdated, err = rsutil.UpdateRSWithRetries(dc.client.Extensions().ReplicaSets(namespace), updatedRS,
		func(updated *extensions.ReplicaSet) error {
			// Precondition: the RS doesn't contain the new hash in its pod template label.
			if updated.Spec.Template.Labels[extensions.DefaultDeploymentUniqueLabelKey] == hash {
				return utilerrors.ErrPreconditionViolated
			}
			updated.Spec.Template.Labels = labelsutil.AddLabel(updated.Spec.Template.Labels, extensions.DefaultDeploymentUniqueLabelKey, hash)
			return nil
		})
	if err != nil {
		return nil, fmt.Errorf("error updating %s %s/%s pod template label with template hash: %v", updatedRS.Kind, updatedRS.Namespace, updatedRS.Name, err)
	}
	if !rsUpdated {
		// If RS wasn't updated but didn't return error in step 1, we've hit a RS not found error.
		// Return here and retry in the next sync loop.
		return rs, nil
	}
	// Make sure rs pod template is updated so that it won't create pods without the new label (orphaned pods).
	if updatedRS.Generation > updatedRS.Status.ObservedGeneration {
		if err = deploymentutil.WaitForReplicaSetUpdated(dc.client, updatedRS.Generation, namespace, updatedRS.Name); err != nil {
			return nil, fmt.Errorf("error waiting for %s %s/%s generation %d observed by controller: %v", updatedRS.Kind, updatedRS.Namespace, updatedRS.Name, updatedRS.Generation, err)
		}
	}
	glog.V(4).Infof("Observed the update of %s %s/%s's pod template with hash %s.", rs.Kind, rs.Namespace, rs.Name, hash)

	// 2. Update all pods managed by the rs to have the new hash label, so they will be correctly adopted.
	selector, err := unversioned.LabelSelectorAsSelector(updatedRS.Spec.Selector)
	if err != nil {
		return nil, fmt.Errorf("error in converting selector to label selector for replica set %s: %s", updatedRS.Name, err)
	}
	options := api.ListOptions{LabelSelector: selector}
	pods, err := dc.podLister.Pods(namespace).List(options.LabelSelector)
	if err != nil {
		return nil, fmt.Errorf("error in getting pod list for namespace %s and list options %+v: %s", namespace, options, err)
	}
	podList := api.PodList{Items: make([]api.Pod, 0, len(pods))}
	for i := range pods {
		podList.Items = append(podList.Items, *pods[i])
	}
	allPodsLabeled := false
	if allPodsLabeled, err = deploymentutil.LabelPodsWithHash(&podList, updatedRS, dc.client, namespace, hash); err != nil {
		return nil, fmt.Errorf("error in adding template hash label %s to pods %+v: %s", hash, podList, err)
	}
	// If not all pods are labeled but didn't return error in step 2, we've hit at least one pod not found error.
	// Return here and retry in the next sync loop.
	if !allPodsLabeled {
		return updatedRS, nil
	}

	// We need to wait for the replicaset controller to observe the pods being
	// labeled with pod template hash. Because previously we've called
	// WaitForReplicaSetUpdated, the replicaset controller should have dropped
	// FullyLabeledReplicas to 0 already, we only need to wait it to increase
	// back to the number of replicas in the spec.
	if err = deploymentutil.WaitForPodsHashPopulated(dc.client, updatedRS.Generation, namespace, updatedRS.Name); err != nil {
		return nil, fmt.Errorf("%s %s/%s: error waiting for replicaset controller to observe pods being labeled with template hash: %v", updatedRS.Kind, updatedRS.Namespace, updatedRS.Name, err)
	}

	// 3. Update rs label and selector to include the new hash label
	// Copy the old selector, so that we can scrub out any orphaned pods
	if updatedRS, rsUpdated, err = rsutil.UpdateRSWithRetries(dc.client.Extensions().ReplicaSets(namespace), updatedRS,
		func(updated *extensions.ReplicaSet) error {
			// Precondition: the RS doesn't contain the new hash in its label or selector.
			if updated.Labels[extensions.DefaultDeploymentUniqueLabelKey] == hash && updated.Spec.Selector.MatchLabels[extensions.DefaultDeploymentUniqueLabelKey] == hash {
				return utilerrors.ErrPreconditionViolated
			}
			updated.Labels = labelsutil.AddLabel(updated.Labels, extensions.DefaultDeploymentUniqueLabelKey, hash)
			updated.Spec.Selector = labelsutil.AddLabelToSelector(updated.Spec.Selector, extensions.DefaultDeploymentUniqueLabelKey, hash)
			return nil
		}); err != nil {
		return nil, fmt.Errorf("error updating %s %s/%s label and selector with template hash: %v", updatedRS.Kind, updatedRS.Namespace, updatedRS.Name, err)
	}
	if rsUpdated {
		glog.V(4).Infof("Updated %s %s/%s's selector and label with hash %s.", rs.Kind, rs.Namespace, rs.Name, hash)
	}
	// If the RS isn't actually updated in step 3, that's okay, we'll retry in the next sync loop since its selector isn't updated yet.

	// TODO: look for orphaned pods and label them in the background somewhere else periodically

	return updatedRS, nil
}