Golang Operation.Errorf方法代码示例

func (m *Manager) Attach(op trace.Operation, disk *types.VirtualDisk) error {
	deviceList := object.VirtualDeviceList{}
	deviceList = append(deviceList, disk)

	changeSpec, err := deviceList.ConfigSpec(types.VirtualDeviceConfigSpecOperationAdd)
	if err != nil {
		return err
	}

	machineSpec := types.VirtualMachineConfigSpec{}
	machineSpec.DeviceChange = append(machineSpec.DeviceChange, changeSpec...)

	m.reconfig.Lock()
	_, err = m.vm.WaitForResult(op, func(ctx context.Context) (tasks.Task, error) {
		t, er := m.vm.Reconfigure(ctx, machineSpec)

		op.Debugf("Attach reconfigure task=%s", t.Reference())

		return t, er
	})
	m.reconfig.Unlock()

	if err != nil {
		op.Errorf("vmdk storage driver failed to attach disk: %s", errors.ErrorStack(err))
		return errors.Trace(err)
	}
	return nil
}

func (v *ImageStore) deleteImage(op trace.Operation, storeName, ID string) error {
	// Delete in order of manifest (the done file), the vmdk (because VC honors
	// the deletable flag in the vmdk file), then the directory to get
	// everything else.
	paths := []string{
		v.manifestPath(storeName, ID),
		v.imageDiskPath(storeName, ID),
		v.imageDirPath(storeName, ID),
	}

	for _, pth := range paths {
		err := v.ds.Rm(op, pth)

		// not exist is ok
		if err == nil || types.IsFileNotFound(err) {
			continue
		}

		// something isn't right.  bale.
		op.Errorf("ImageStore: delete image error: %s", err.Error())
		return err
	}

	return nil
}

func (m *Manager) Detach(op trace.Operation, d *VirtualDisk) error {
	defer trace.End(trace.Begin(d.DevicePath))
	op.Infof("Detaching disk %s", d.DevicePath)

	d.lock()
	defer d.unlock()

	if !d.Attached() {
		op.Infof("Disk %s is already detached", d.DevicePath)
		return nil
	}

	if err := d.canBeDetached(); err != nil {
		return errors.Trace(err)
	}

	spec := types.VirtualMachineConfigSpec{}

	disk, err := findDisk(op, m.vm, d.DatastoreURI)
	if err != nil {
		return errors.Trace(err)
	}

	config := []types.BaseVirtualDeviceConfigSpec{
		&types.VirtualDeviceConfigSpec{
			Device:    disk,
			Operation: types.VirtualDeviceConfigSpecOperationRemove,
		},
	}

	spec.DeviceChange = config

	m.reconfig.Lock()
	_, err = m.vm.WaitForResult(op, func(ctx context.Context) (tasks.Task, error) {
		t, er := m.vm.Reconfigure(ctx, spec)

		op.Debugf("Detach reconfigure task=%s", t.Reference())

		return t, er
	})
	m.reconfig.Unlock()

	if err != nil {
		op.Errorf(err.Error())
		log.Warnf("detach for %s failed with %s", d.DevicePath, errors.ErrorStack(err))
		return errors.Trace(err)
	}

	func() {
		select {
		case <-m.maxAttached:
		default:
		}
	}()

	return d.setDetached()
}

// DeleteImage deletes an image from the image store.  If the image is in
// use either by way of inheritance or because it's attached to a
// container, this will return an error.
func (v *ImageStore) DeleteImage(op trace.Operation, image *portlayer.Image) error {
	//  check if the image is in use.
	if err := imagesInUse(op, image.ID); err != nil {
		op.Errorf("ImageStore: delete image error: %s", err.Error())
		return err
	}

	storeName, err := util.ImageStoreName(image.Store)
	if err != nil {
		return err
	}

	return v.deleteImage(op, storeName, image.ID)
}

// Create the image directory, create a temp vmdk in this directory,
// attach/mount the disk, unpack the tar, check the checksum.  If the data
// doesn't match the expected checksum, abort by nuking the image directory.
// If everything matches, move the tmp vmdk to ID.vmdk.  The unwind path is a
// bit convoluted here;  we need to clean up on the way out in the error case
func (v *ImageStore) writeImage(op trace.Operation, storeName, parentID, ID string, meta map[string][]byte,
	sum string, r io.Reader) error {

	// Create a temp image directory in the store.
	imageDir := v.imageDirPath(storeName, ID)
	_, err := v.ds.Mkdir(op, true, imageDir)
	if err != nil {
		return err
	}

	// Write the metadata to the datastore
	metaDataDir := v.imageMetadataDirPath(storeName, ID)
	err = writeMetadata(op, v.ds, metaDataDir, meta)
	if err != nil {
		return err
	}

	// datastore path to the parent
	parentDiskDsURI := v.imageDiskDSPath(storeName, parentID)

	// datastore path to the disk we're creating
	diskDsURI := v.imageDiskDSPath(storeName, ID)
	op.Infof("Creating image %s (%s)", ID, diskDsURI)

	var vmdisk *disk.VirtualDisk

	// On error, unmount if mounted, detach if attached, and nuke the image directory
	defer func() {
		if err != nil {
			op.Errorf("Cleaning up failed WriteImage directory %s", imageDir)

			if vmdisk != nil {
				if vmdisk.Mounted() {
					op.Debugf("Unmounting abandoned disk")
					vmdisk.Unmount()
				}

				if vmdisk.Attached() {
					op.Debugf("Detaching abandoned disk")
					v.dm.Detach(op, vmdisk)
				}
			}

			v.ds.Rm(op, imageDir)
		}
	}()

	// Create the disk
	vmdisk, err = v.dm.CreateAndAttach(op, diskDsURI, parentDiskDsURI, 0, os.O_RDWR)
	if err != nil {
		return err
	}
	// tmp dir to mount the disk
	dir, err := ioutil.TempDir("", "mnt-"+ID)
	if err != nil {
		return err
	}
	defer os.RemoveAll(dir)

	if err := vmdisk.Mount(dir, nil); err != nil {
		return err
	}

	h := sha256.New()
	t := io.TeeReader(r, h)

	// Untar the archive
	var n int64
	if n, err = archive.ApplyLayer(dir, t); err != nil {
		return err
	}

	op.Debugf("%s wrote %d bytes", ID, n)

	actualSum := fmt.Sprintf("sha256:%x", h.Sum(nil))
	if actualSum != sum {
		err = fmt.Errorf("Failed to validate image checksum. Expected %s, got %s", sum, actualSum)
		return err
	}

	if err = vmdisk.Unmount(); err != nil {
		return err
	}

	if err = v.dm.Detach(op, vmdisk); err != nil {
		return err
	}

	// Write our own bookkeeping manifest file to the image's directory.  We
	// treat the manifest file like a done file.  Its existence means this vmdk
	// is consistent.  Previously we were writing the vmdk to a tmp vmdk file
	// then moving it (using the MoveDatastoreFile or MoveVirtualDisk calls).
	// However(!!) this flattens the vmdk.  Also mkdir foo && ls -l foo fails
	// on VSAN (see
	// https://github.com/vmware/vic/pull/1764#issuecomment-237093424 for
//.........这里部分代码省略.........