func (s *storageCeph) getRBDSize() (string, error) {
	sz, err := shared.ParseByteSizeString(s.volume.Config["size"])
	if err != nil {
		return "", err
	}

	// Safety net: Set to default value.
	if sz == 0 {
		sz, _ = shared.ParseByteSizeString("10GB")
	}

	return fmt.Sprintf("%dB", sz), nil
}
func (s *storageCeph) getRBDSize() (string, error) {
	sz, err := shared.ParseByteSizeString(s.volume.Config["size"])
	if err != nil {
		return "", err
	}

	// Safety net: Set to default value.
	if sz == 0 {
		sz, _ = shared.ParseByteSizeString("10GB")
	}

	return fmt.Sprintf("%dB", sz), nil
}
// getRBDSize returns the size the RBD storage volume is supposed to be created
// with