Golang instance.Instance類代碼示例

// WaitDNSName is an implementation that the providers can use.  It builds on
// the provider's implementation of Instance.DNSName.
func WaitDNSName(inst instance.Instance) (string, error) {
	for a := LongAttempt.Start(); a.Next(); {
		name, err := inst.DNSName()
		if err == nil || err != instance.ErrNoDNSName {
			return name, err
		}
	}
	return "", fmt.Errorf("timed out trying to get DNS address for %v", inst.Id())
}

func (manager *containerManager) StopContainer(instance instance.Instance) error {
	name := string(instance.Id())
	container := lxcObjectFactory.New(name)
	if err := container.Stop(); err != nil {
		logger.Errorf("failed to stop lxc container: %v", err)
		return err
	}
	// Destroy removes the restart symlink for us.
	if err := container.Destroy(); err != nil {
		logger.Errorf("failed to destroy lxc container: %v", err)
		return err
	}

	// Move the directory.
	logger.Tracef("create old container dir: %s", removedContainerDir)
	if err := os.MkdirAll(removedContainerDir, 0755); err != nil {
		logger.Errorf("failed to create removed container directory: %v", err)
		return err
	}
	removedDir, err := uniqueDirectory(removedContainerDir, name)
	if err != nil {
		logger.Errorf("was not able to generate a unique directory: %v", err)
		return err
	}
	if err := os.Rename(jujuContainerDirectory(name), removedDir); err != nil {
		logger.Errorf("failed to rename container directory: %v", err)
		return err
	}
	return nil
}

// assertPorts retrieves the open ports of the instance and compares them
// to the expected.
func (s *FirewallerSuite) assertPorts(c *C, inst instance.Instance, machineId string, expected []instance.Port) {
	s.State.StartSync()
	start := time.Now()
	for {
		got, err := inst.Ports(machineId)
		if err != nil {
			c.Fatal(err)
			return
		}
		state.SortPorts(got)
		state.SortPorts(expected)
		if reflect.DeepEqual(got, expected) {
			c.Succeed()
			return
		}
		if time.Since(start) > coretesting.LongWait {
			c.Fatalf("timed out: expected %q; got %q", expected, got)
			return
		}
		time.Sleep(coretesting.ShortWait)
	}
}

// assertInstanceId asserts that the machine has an instance id
// that matches that of the given instance. If the instance is nil,
// It asserts that the instance id is unset.
func assertInstanceId(c *C, m *state.Machine, inst instance.Instance) {
	var wantId, gotId instance.Id
	var err error
	if inst != nil {
		wantId = inst.Id()
	}
	for a := waitAgent.Start(); a.Next(); {
		err := m.Refresh()
		c.Assert(err, IsNil)
		gotId, err = m.InstanceId()
		if err != nil {
			c.Assert(state.IsNotProvisionedError(err), IsTrue)
			if inst == nil {
				return
			}
			continue
		}
		break
	}
	c.Assert(err, IsNil)
	c.Assert(gotId, Equals, wantId)
}

func (s *lxcBrokerSuite) lxcRemovedContainerDir(inst instance.Instance) string {
	return filepath.Join(s.RemovedDir, string(inst.Id()))
}