Golang ReplicationControllersNamespacer.ReplicationControllers方法代码示例

// WaitForRunningDeployment waits until the specified deployment is no longer New or Pending. Returns true if
// the deployment became running, complete, or failed within timeout, false if it did not, and an error if any
// other error state occurred. The last observed deployment state is returned.
func WaitForRunningDeployment(rn kclient.ReplicationControllersNamespacer, observed *kapi.ReplicationController, timeout time.Duration) (*kapi.ReplicationController, bool, error) {
	fieldSelector := fields.Set{"metadata.name": observed.Name}.AsSelector()
	w, err := rn.ReplicationControllers(observed.Namespace).Watch(labels.Everything(), fieldSelector, observed.ResourceVersion)
	if err != nil {
		return observed, false, err
	}
	defer w.Stop()

	ch := w.ResultChan()
	// Passing time.After like this (vs receiving directly in a select) will trigger the channel
	// and the timeout will have full effect here.
	expire := time.After(timeout)
	for {
		select {
		case event := <-ch:
			obj, ok := event.Object.(*kapi.ReplicationController)
			if !ok {
				return observed, false, errors.New("received unknown object while watching for deployments")
			}
			observed = obj

			switch deployutil.DeploymentStatusFor(observed) {
			case api.DeploymentStatusRunning, api.DeploymentStatusFailed, api.DeploymentStatusComplete:
				return observed, true, nil
			case api.DeploymentStatusNew, api.DeploymentStatusPending:
			default:
				return observed, false, ErrUnknownDeploymentPhase
			}
		case <-expire:
			return observed, false, nil
		}
	}
}

// WaitForRunningDeployment waits until the specified deployment is no longer New or Pending. Returns true if
// the deployment became running, complete, or failed within timeout, false if it did not, and an error if any
// other error state occurred. The last observed deployment state is returned.
func WaitForRunningDeployment(rn kclient.ReplicationControllersNamespacer, observed *kapi.ReplicationController, timeout time.Duration) (*kapi.ReplicationController, bool, error) {
	fieldSelector := fields.Set{"metadata.name": observed.Name}.AsSelector()
	options := kapi.ListOptions{FieldSelector: fieldSelector, ResourceVersion: observed.ResourceVersion}
	w, err := rn.ReplicationControllers(observed.Namespace).Watch(options)
	if err != nil {
		return observed, false, err
	}
	defer w.Stop()

	if _, err := watch.Until(timeout, w, func(e watch.Event) (bool, error) {
		if e.Type == watch.Error {
			return false, fmt.Errorf("encountered error while watching for replication controller: %v", e.Object)
		}
		obj, isController := e.Object.(*kapi.ReplicationController)
		if !isController {
			return false, fmt.Errorf("received unknown object while watching for deployments: %v", obj)
		}
		observed = obj
		switch deployutil.DeploymentStatusFor(observed) {
		case api.DeploymentStatusRunning, api.DeploymentStatusFailed, api.DeploymentStatusComplete:
			return true, nil
		case api.DeploymentStatusNew, api.DeploymentStatusPending:
			return false, nil
		default:
			return false, ErrUnknownDeploymentPhase
		}
	}); err != nil {
		return observed, false, err
	}

	return observed, true, nil
}

func LoadExistingNextReplicationController(c client.ReplicationControllersNamespacer, namespace, newName string) (*api.ReplicationController, error) {
	if len(newName) == 0 {
		return nil, nil
	}
	newRc, err := c.ReplicationControllers(namespace).Get(newName)
	if err != nil && errors.IsNotFound(err) {
		return nil, nil
	}
	return newRc, err
}

func FindSourceController(r client.ReplicationControllersNamespacer, namespace, name string) (*api.ReplicationController, error) {
	list, err := r.ReplicationControllers(namespace).List(labels.Everything())
	if err != nil {
		return nil, err
	}
	for ix := range list.Items {
		rc := &list.Items[ix]
		if rc.Annotations != nil && strings.HasPrefix(rc.Annotations[sourceIdAnnotation], name) {
			return rc, nil
		}
	}
	return nil, fmt.Errorf("couldn't find a replication controller with source id == %s/%s", namespace, name)
}

func Rename(c client.ReplicationControllersNamespacer, rc *api.ReplicationController, newName string) error {
	oldName := rc.Name
	rc.Name = newName
	rc.ResourceVersion = ""

	_, err := c.ReplicationControllers(rc.Namespace).Create(rc)
	if err != nil {
		return err
	}
	err = c.ReplicationControllers(rc.Namespace).Delete(oldName)
	if err != nil && !errors.IsNotFound(err) {
		return err
	}
	return nil
}

// GetReplicationControllerListChannel Returns a pair of channels to a
// Replication Controller list and errors that both must be read
// numReads times.
func GetReplicationControllerListChannel(client client.ReplicationControllersNamespacer,
	nsQuery *NamespaceQuery, numReads int) ReplicationControllerListChannel {

	channel := ReplicationControllerListChannel{
		List:  make(chan *api.ReplicationControllerList, numReads),
		Error: make(chan error, numReads),
	}

	go func() {
		list, err := client.ReplicationControllers(nsQuery.ToRequestParam()).List(listEverything)
		var filteredItems []api.ReplicationController
		for _, item := range list.Items {
			if nsQuery.Matches(item.ObjectMeta.Namespace) {
				filteredItems = append(filteredItems, item)
			}
		}
		list.Items = filteredItems
		for i := 0; i < numReads; i++ {
			channel.List <- list
			channel.Error <- err
		}
	}()

	return channel
}

// decodeFromLatestDeployment will try to return the decoded version of the current deploymentconfig
// found in the annotations of its latest deployment. If there is no previous deploymentconfig (ie.
// latestVersion == 0), the returned deploymentconfig will be the same.
func decodeFromLatestDeployment(config *deployapi.DeploymentConfig, rn kclient.ReplicationControllersNamespacer, decoder runtime.Decoder) (*deployapi.DeploymentConfig, error) {
	if config.Status.LatestVersion == 0 {
		return config, nil
	}

	latestDeploymentName := deployutil.LatestDeploymentNameForConfig(config)
	deployment, err := rn.ReplicationControllers(config.Namespace).Get(latestDeploymentName)
	if err != nil {
		// If there's no deployment for the latest config, we have no basis of
		// comparison. It's the responsibility of the deployment config controller
		// to make the deployment for the config, so return early.
		return nil, err
	}
	decoded, err := deployutil.DecodeDeploymentConfig(deployment, decoder)
	if err != nil {
		return nil, errors.NewInternalError(err)
	}
	return decoded, nil
}

func Rename(c client.ReplicationControllersNamespacer, rc *api.ReplicationController, newName string) error {
	oldName := rc.Name
	rc.Name = newName
	rc.ResourceVersion = ""
	// First delete the oldName RC and orphan its pods.
	trueVar := true
	err := c.ReplicationControllers(rc.Namespace).Delete(oldName, &api.DeleteOptions{OrphanDependents: &trueVar})
	if err != nil && !errors.IsNotFound(err) {
		return err
	}
	err = wait.Poll(5*time.Second, 60*time.Second, func() (bool, error) {
		_, err := c.ReplicationControllers(rc.Namespace).Get(oldName)
		if err == nil {
			return false, nil
		} else if errors.IsNotFound(err) {
			return true, nil
		} else {
			return false, err
		}
	})
	if err != nil {
		return err
	}
	// Then create the same RC with the new name.
	_, err = c.ReplicationControllers(rc.Namespace).Create(rc)
	if err != nil {
		return err
	}
	return nil
}