Golang instance.IsRetryableCreationError函数代码示例

func (task *provisionerTask) startMachine(
	machine *apiprovisioner.Machine,
	provisioningInfo *params.ProvisioningInfo,
	startInstanceParams environs.StartInstanceParams,
) error {

	result, err := task.broker.StartInstance(startInstanceParams)
	if err != nil {
		// If this is a retryable error, we retry once
		if instance.IsRetryableCreationError(errors.Cause(err)) {
			logger.Infof("retryable error received on start instance - retrying instance creation")
			result, err = task.broker.StartInstance(startInstanceParams)
			if err != nil {
				return task.setErrorStatus("cannot start instance for machine after a retry %q: %v", machine, err)
			}
		} else {
			// Set the state to error, so the machine will be skipped next
			// time until the error is resolved, but don't return an
			// error; just keep going with the other machines.
			return task.setErrorStatus("cannot start instance for machine %q: %v", machine, err)
		}
	}

	inst := result.Instance
	hardware := result.Hardware
	nonce := startInstanceParams.InstanceConfig.MachineNonce
	networks, ifaces, err := task.prepareNetworkAndInterfaces(result.NetworkInfo)
	if err != nil {
		return task.setErrorStatus("cannot prepare network for machine %q: %v", machine, err)
	}
	volumes := volumesToApiserver(result.Volumes)
	volumeAttachments := volumeAttachmentsToApiserver(result.VolumeAttachments)

	// TODO(dimitern) In a newer Provisioner API version, change
	// SetInstanceInfo or add a new method that takes and saves in
	// state all the information available on a network.InterfaceInfo
	// for each interface, so we can later manage interfaces
	// dynamically at run-time.
	err = machine.SetInstanceInfo(inst.Id(), nonce, hardware, networks, ifaces, volumes, volumeAttachments)
	if err != nil && params.IsCodeNotImplemented(err) {
		return fmt.Errorf("cannot provision instance %v for machine %q with networks: not implemented", inst.Id(), machine)
	} else if err == nil {
		logger.Infof(
			"started machine %s as instance %s with hardware %q, networks %v, interfaces %v, volumes %v, volume attachments %v, subnets to zones %v",
			machine, inst.Id(), hardware,
			networks, ifaces,
			volumes, volumeAttachments,
			startInstanceParams.SubnetsToZones,
		)
		return nil
	}
	// We need to stop the instance right away here, set error status and go on.
	task.setErrorStatus("cannot register instance for machine %v: %v", machine, err)
	if err := task.broker.StopInstances(inst.Id()); err != nil {
		// We cannot even stop the instance, log the error and quit.
		return errors.Annotatef(err, "cannot stop instance %q for machine %v", inst.Id(), machine)
	}
	return nil
}

func (s *LxcSuite) TestCreateContainerFailsWithInjectedCreateError(c *gc.C) {
	errorChannel := make(chan error, 1)
	cleanup := mock.PatchCreateTransientErrorInjectionChannel(errorChannel)
	defer cleanup()

	errorChannel <- errors.New("lxc-create error")

	manager := s.makeManager(c, "test")
	_, err := containertesting.CreateContainerTest(c, manager, "1/lxc/0")
	c.Assert(err, gc.NotNil)

	// this should be a retryable error
	isRetryable := instance.IsRetryableCreationError(errors.Cause(err))
	c.Assert(isRetryable, jc.IsTrue)
	c.Assert(err, gc.ErrorMatches, "lxc container creation failed.*")
}

func (s *LxcSuite) TestCreateContainerFailsWithInjectedStartError(c *gc.C) {
	errorChannel := make(chan error, 1)
	cleanup := mock.PatchStartTransientErrorInjectionChannel(errorChannel)
	defer cleanup()

	// One injected error means the container creation will fail
	// but the destroy function will clean up the remaining container
	// resulting in a RetryableCreationError
	errorChannel <- errors.New("start error")

	manager := s.makeManager(c, "test")
	_, err := containertesting.CreateContainerTest(c, manager, "1/lxc/0")
	c.Assert(err, gc.NotNil)

	// this should be a retryable error
	isRetryable := instance.IsRetryableCreationError(errors.Cause(err))
	c.Assert(isRetryable, jc.IsTrue)
}

func (s *LxcSuite) TestCreateContainerWithInjectedErrorDestroyFails(c *gc.C) {
	errorChannel := make(chan error, 2)
	cleanup := mock.PatchStartTransientErrorInjectionChannel(errorChannel)
	defer cleanup()

	// Two injected errors mean that the container creation and subsequent
	// destroy will fail. This should not result in a RetryableCreationError
	// as the container was left in an error state
	errorChannel <- errors.New("create error")
	errorChannel <- errors.New("destroy error")

	manager := s.makeManager(c, "test")
	_, err := containertesting.CreateContainerTest(c, manager, "1/lxc/0")
	c.Assert(err, gc.NotNil)

	// this should not be a retryable error
	isRetryable := instance.IsRetryableCreationError(errors.Cause(err))
	c.Assert(isRetryable, jc.IsFalse)
}

func (task *provisionerTask) startMachine(
	machine *apiprovisioner.Machine,
	provisioningInfo *params.ProvisioningInfo,
	startInstanceParams environs.StartInstanceParams,
) error {

	result, err := task.broker.StartInstance(startInstanceParams)
	if err != nil {
		if !instance.IsRetryableCreationError(errors.Cause(err)) {
			// Set the state to error, so the machine will be skipped next
			// time until the error is resolved, but don't return an
			// error; just keep going with the other machines.
			return task.setErrorStatus("cannot start instance for machine %q: %v", machine, err)
		}
		logger.Infof("retryable error received on start instance: %v", err)
		for count := task.retryStartInstanceStrategy.retryCount; count > 0; count-- {
			if task.retryStartInstanceStrategy.retryDelay > 0 {
				select {
				case <-task.catacomb.Dying():
					return task.catacomb.ErrDying()
				case <-time.After(task.retryStartInstanceStrategy.retryDelay):
				}

			}
			result, err = task.broker.StartInstance(startInstanceParams)
			if err == nil {
				break
			}
			// If this was the last attempt and an error was received, set the error
			// status on the machine.
			if count == 1 {
				return task.setErrorStatus("cannot start instance for machine %q: %v", machine, err)
			}
		}
	}

	inst := result.Instance
	hardware := result.Hardware
	nonce := startInstanceParams.InstanceConfig.MachineNonce
	networks, ifaces, err := task.prepareNetworkAndInterfaces(result.NetworkInfo)
	if err != nil {
		return task.setErrorStatus("cannot prepare network for machine %q: %v", machine, err)
	}
	volumes := volumesToApiserver(result.Volumes)
	volumeAttachments := volumeAttachmentsToApiserver(result.VolumeAttachments)

	// TODO(dimitern) In a newer Provisioner API version, change
	// SetInstanceInfo or add a new method that takes and saves in
	// state all the information available on a network.InterfaceInfo
	// for each interface, so we can later manage interfaces
	// dynamically at run-time.
	err = machine.SetInstanceInfo(inst.Id(), nonce, hardware, networks, ifaces, volumes, volumeAttachments)
	if err == nil {
		logger.Infof(
			"started machine %s as instance %s with hardware %q, networks %v, interfaces %v, volumes %v, volume attachments %v, subnets to zones %v",
			machine, inst.Id(), hardware,
			networks, ifaces,
			volumes, volumeAttachments,
			startInstanceParams.SubnetsToZones,
		)
		return nil
	}
	// We need to stop the instance right away here, set error status and go on.
	task.setErrorStatus("cannot register instance for machine %v: %v", machine, err)
	if err := task.broker.StopInstances(inst.Id()); err != nil {
		// We cannot even stop the instance, log the error and quit.
		return errors.Annotatef(err, "cannot stop instance %q for machine %v", inst.Id(), machine)
	}
	return nil
}