Golang hcsshim.IsPending函數代碼示例

// Signal handles `docker stop` on Windows. While Linux has support for
// the full range of signals, signals aren't really implemented on Windows.
// We fake supporting regular stop and -9 to force kill.
func (clnt *client) Signal(containerID string, sig int) error {
	var (
		cont *container
		err  error
	)

	// Get the container as we need it to get the container handle.
	clnt.lock(containerID)
	defer clnt.unlock(containerID)
	if cont, err = clnt.getContainer(containerID); err != nil {
		return err
	}

	cont.manualStopRequested = true

	logrus.Debugf("libcontainerd: Signal() containerID=%s sig=%d pid=%d", containerID, sig, cont.systemPid)

	if syscall.Signal(sig) == syscall.SIGKILL {
		// Terminate the compute system
		if err := cont.hcsContainer.Terminate(); err != nil {
			if !hcsshim.IsPending(err) {
				logrus.Errorf("libcontainerd: failed to terminate %s - %q", containerID, err)
			}
		}
	} else {
		// Terminate Process
		if err := cont.hcsProcess.Kill(); err != nil && !hcsshim.IsAlreadyStopped(err) {
			// ignore errors
			logrus.Warnf("libcontainerd: failed to terminate pid %d in %s: %q", cont.systemPid, containerID, err)
		}
	}

	return nil
}

// terminate terminates the container in HCS
// Caller needs to lock container ID before calling this method.
func (ctr *container) terminate() error {
	const terminateTimeout = time.Minute * 5
	err := ctr.hcsContainer.Terminate()

	if hcsshim.IsPending(err) {
		err = ctr.hcsContainer.WaitTimeout(terminateTimeout)
	} else if hcsshim.IsAlreadyStopped(err) {
		err = nil
	}

	if err != nil {
		logrus.Debugf("libcontainerd: error terminating container %s %v", ctr.containerID, err)
		return err
	}

	return nil
}

// shutdown shuts down the container in HCS
// Caller needs to lock container ID before calling this method.
func (ctr *container) shutdown() error {
	const shutdownTimeout = time.Minute * 5
	err := ctr.hcsContainer.Shutdown()
	if hcsshim.IsPending(err) {
		// Explicit timeout to avoid a (remote) possibility that shutdown hangs indefinitely.
		err = ctr.hcsContainer.WaitTimeout(shutdownTimeout)
	} else if hcsshim.IsAlreadyStopped(err) {
		err = nil
	}

	if err != nil {
		logrus.Debugf("libcontainerd: error shutting down container %s %v calling terminate", ctr.containerID, err)
		if err := ctr.terminate(); err != nil {
			return err
		}
		return err
	}

	return nil
}

// Remove unmounts and removes the dir information.
func (d *Driver) Remove(id string) error {
	rID, err := d.resolveID(id)
	if err != nil {
		return err
	}

	// This retry loop is due to a bug in Windows (Internal bug #9432268)
	// if GetContainers fails with ErrVmcomputeOperationInvalidState
	// it is a transient error. Retry until it succeeds.
	var computeSystems []hcsshim.ContainerProperties
	retryCount := 0
	for {
		// Get and terminate any template VMs that are currently using the layer
		computeSystems, err = hcsshim.GetContainers(hcsshim.ComputeSystemQuery{})
		if err != nil {
			if err == hcsshim.ErrVmcomputeOperationInvalidState {
				if retryCount >= 5 {
					// If we are unable to get the list of containers
					// go ahead and attempt to delete the layer anyway
					// as it will most likely work.
					break
				}
				retryCount++
				time.Sleep(2 * time.Second)
				continue
			}
			return err
		}
		break
	}

	for _, computeSystem := range computeSystems {
		if strings.Contains(computeSystem.RuntimeImagePath, id) && computeSystem.IsRuntimeTemplate {
			container, err := hcsshim.OpenContainer(computeSystem.ID)
			if err != nil {
				return err
			}
			defer container.Close()
			err = container.Terminate()
			if hcsshim.IsPending(err) {
				err = container.Wait()
			} else if hcsshim.IsAlreadyStopped(err) {
				err = nil
			}

			if err != nil {
				return err
			}
		}
	}

	layerPath := filepath.Join(d.info.HomeDir, rID)
	tmpID := fmt.Sprintf("%s-removing", rID)
	tmpLayerPath := filepath.Join(d.info.HomeDir, tmpID)
	if err := os.Rename(layerPath, tmpLayerPath); err != nil && !os.IsNotExist(err) {
		return err
	}
	if err := hcsshim.DestroyLayer(d.info, tmpID); err != nil {
		logrus.Errorf("Failed to DestroyLayer %s: %s", id, err)
	}

	return nil
}