コード例 #1
0
func createBlockDevice(label string, opts map[string]string) error {
	backing := getBackingFileName(label)
	err := createBackingFile(backing)
	if err != nil {
		return err
	}
	loopbackCount := getMaxLoopbackCount() + 1
	device := fmt.Sprintf("/dev/loop%d", loopbackCount)
	err = createDeviceNode(device, loopbackCount)
	if err != nil {
		return err
	}
	// Ignore output. This is to prevent spurious failures from old devices
	// that were removed, but not detached.
	exec.Command("losetup", "-d", device).CombinedOutput()
	err = setupLoopbackDevice(backing, device)
	if err != nil {
		return err
	}
	// Use default fstype if not specified
	if _, result := opts["fstype"]; result == false {
		opts["fstype"] = fs.FstypeDefault
	}
	mkfscmd, result := fs.MkfsLookup()[opts["fstype"]]
	if result == false {
		return fmt.Errorf("Not found mkfs for %s", opts["fstype"])
	}
	return fs.Mkfs(mkfscmd, label, device)
}
コード例 #2
0
// The user wants to create a volume.
// No need to actually manifest the volume on the filesystem yet
// (until Mount is called).
// Name and driver specific options passed through to the ESX host
func (d *vmdkDriver) Create(r volume.Request) volume.Response {

	// Use default fstype if not specified
	if _, result := r.Options["fstype"]; result == false {
		r.Options["fstype"] = fs.FstypeDefault
	}

	// Get existent filesystem tools
	supportedFs := fs.MkfsLookup()

	// Verify the existence of fstype mkfs
	mkfscmd, result := supportedFs[r.Options["fstype"]]
	if result == false {
		msg := "Not found mkfs for " + r.Options["fstype"]
		msg += "\nSupported filesystems found: "
		validfs := ""
		for fs := range supportedFs {
			if validfs != "" {
				validfs += ", " + fs
			} else {
				validfs += fs
			}
		}
		log.WithFields(log.Fields{"name": r.Name,
			"fstype": r.Options["fstype"]}).Error("Not found ")
		return volume.Response{Err: msg + validfs}
	}

	errCreate := d.ops.Create(r.Name, r.Options)
	if errCreate != nil {
		log.WithFields(log.Fields{"name": r.Name, "error": errCreate}).Error("Create volume failed ")
		return volume.Response{Err: errCreate.Error()}
	}

	// Handle filesystem creation
	log.WithFields(log.Fields{"name": r.Name,
		"fstype": r.Options["fstype"]}).Info("Attaching volume and creating filesystem ")

	dev, errAttach := d.ops.Attach(r.Name, nil)
	if errAttach != nil {
		log.WithFields(log.Fields{"name": r.Name,
			"error": errAttach}).Error("Attach volume failed, removing the volume ")
		errRemove := d.ops.Remove(r.Name, nil)
		if errRemove != nil {
			log.WithFields(log.Fields{"name": r.Name, "error": errRemove}).Warning("Remove volume failed ")
		}
		return volume.Response{Err: errAttach.Error()}
	}

	device, errGetDevicePath := fs.GetDevicePath(dev)
	if errGetDevicePath != nil {
		log.WithFields(log.Fields{"name": r.Name,
			"error": errGetDevicePath}).Error("Could not find attached device, removing the volume ")
		errDetach := d.ops.Detach(r.Name, nil)
		if errDetach != nil {
			log.WithFields(log.Fields{"name": r.Name, "error": errDetach}).Warning("Detach volume failed ")
		}
		errRemove := d.ops.Remove(r.Name, nil)
		if errRemove != nil {
			log.WithFields(log.Fields{"name": r.Name, "error": errRemove}).Warning("Remove volume failed ")
		}
		return volume.Response{Err: errGetDevicePath.Error()}
	}

	errMkfs := fs.Mkfs(mkfscmd, r.Name, device)
	if errMkfs != nil {
		log.WithFields(log.Fields{"name": r.Name,
			"error": errMkfs}).Error("Create filesystem failed, removing the volume ")
		errDetach := d.ops.Detach(r.Name, nil)
		if errDetach != nil {
			log.WithFields(log.Fields{"name": r.Name, "error": errDetach}).Warning("Detach volume failed ")
		}
		errRemove := d.ops.Remove(r.Name, nil)
		if errRemove != nil {
			log.WithFields(log.Fields{"name": r.Name, "error": errRemove}).Warning("Remove volume failed ")
		}
		return volume.Response{Err: errMkfs.Error()}
	}

	errDetach := d.ops.Detach(r.Name, nil)
	if errDetach != nil {
		log.WithFields(log.Fields{"name": r.Name, "error": errDetach}).Error("Detach volume failed ")
		return volume.Response{Err: errDetach.Error()}
	}

	log.WithFields(log.Fields{"name": r.Name,
		"fstype": r.Options["fstype"]}).Info("Volume and filesystem created ")
	return volume.Response{Err: ""}
}