Exemplo n.º 1
0
// DeleteController deletes a replication controller named 'name', requires that the controller
// already be stopped
func DeleteController(name string, client client.ClientInterface) 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)", controller.DesiredState.Replicas)
	}
	return client.DeleteReplicationController(name)
}
Exemplo n.º 2
0
// StopController stops a controller named 'name' by setting replicas to zero
func StopController(name string, client client.ClientInterface) error {
	controller, err := client.GetReplicationController(name)
	if err != nil {
		return err
	}
	controller.DesiredState.Replicas = 0
	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
}
Exemplo n.º 3
0
// Perform 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.ClientInterface, updatePeriod time.Duration) error {
	controller, err := client.GetReplicationController(name)
	if err != nil {
		return err
	}
	labels := controller.DesiredState.ReplicasInSet

	podList, err := client.ListPods(labels)
	if err != nil {
		return err
	}
	for _, pod := range podList.Items {
		_, err = client.UpdatePod(pod)
		if err != nil {
			return err
		}
		time.Sleep(updatePeriod)
	}
	return nil
}
Exemplo n.º 4
0
// Perform 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.ClientInterface, 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
	}
	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 its what we support for now.
		err = client.DeletePod(pod.ID)
		if err != nil {
			return err
		}
		time.Sleep(updatePeriod)
	}
	return nil
}