예제 #1
0
파일: kubecfg.go 프로젝트: K-A-Z/kubernetes
// Update performs a rolling update of a collection of pods.
// 'name' points to a replication controller.
// 'client' is used for updating pods.
// 'updatePeriod' is the time between pod updates.
func Update(name string, client client.Interface, updatePeriod time.Duration) error {
	controller, err := client.GetReplicationController(name)
	if err != nil {
		return err
	}
	s := labels.Set(controller.DesiredState.ReplicaSelector).AsSelector()

	podList, err := client.ListPods(s)
	if err != nil {
		return err
	}
	expected := len(podList.Items)
	if expected == 0 {
		return nil
	}
	for _, pod := range podList.Items {
		// We delete the pod here, the controller will recreate it.  This will result in pulling
		// a new Docker image.  This isn't a full "update" but it's what we support for now.
		err = client.DeletePod(pod.ID)
		if err != nil {
			return err
		}
		time.Sleep(updatePeriod)
	}
	return wait.Poll(time.Second*5, time.Second*300, func() (bool, error) {
		podList, err := client.ListPods(s)
		if err != nil {
			return false, err
		}
		return len(podList.Items) == expected, nil
	})
}
예제 #2
0
// DeleteController deletes a replication controller named 'name', requires that the controller
// already be stopped
func DeleteController(name string, client client.Interface) error {
	controller, err := client.GetReplicationController(name)
	if err != nil {
		return err
	}
	if controller.DesiredState.Replicas != 0 {
		return fmt.Errorf("controller has non-zero replicas (%d), please stop it first", controller.DesiredState.Replicas)
	}
	return client.DeleteReplicationController(name)
}
예제 #3
0
// ResizeController resizes a controller named 'name' by setting replicas to 'replicas'
func ResizeController(name string, replicas int, client client.Interface) error {
	controller, err := client.GetReplicationController(name)
	if err != nil {
		return err
	}
	controller.DesiredState.Replicas = replicas
	controllerOut, err := client.UpdateReplicationController(controller)
	if err != nil {
		return err
	}
	data, err := yaml.Marshal(controllerOut)
	if err != nil {
		return err
	}
	fmt.Print(string(data))
	return nil
}