// NetworkName will return relevant information about how a volume can be discovered on an OS
func (driver *Driver) NetworkName(volumeName, instanceID string) (string, error) {
volumes, err := storage.GetVolume("", volumeName)
if err != nil {
return "", err
}
switch {
case len(volumes) == 0:
return "", errors.New("No volumes returned by name")
case len(volumes) > 1:
return "", errors.New("Multiple volumes returned by name")
}
volumeAttachment, err := storage.GetVolumeAttach(volumes[0].VolumeID, instanceID)
if err != nil {
return "", err
}
if len(volumeAttachment) == 0 {
return "", errors.New("Volume not attached")
}
volumes, err = storage.GetVolume("", volumeName)
if err != nil {
return "", err
}
return volumes[0].NetworkName, nil
}
// Unmount will perform the steps to unmount and existing volume and detach
func (driver *Driver) Unmount(volumeName, volumeID string) error {
if volumeName == "" && volumeID == "" {
return errors.New("Missing volume name or ID")
}
instances, err := storage.GetInstance()
if err != nil {
return err
}
switch {
case len(instances) == 0:
return errors.New("No instances")
case len(instances) > 1:
return errors.New("Too many instances returned, limit the storagedrivers")
}
volumes, err := storage.GetVolume(volumeID, volumeName)
if err != nil {
return err
}
switch {
case len(volumes) == 0:
return errors.New("No volumes returned by name")
case len(volumes) > 1:
return errors.New("Multiple volumes returned by name")
}
volumeAttachment, err := storage.GetVolumeAttach(volumes[0].VolumeID, instances[0].InstanceID)
if err != nil {
return err
}
if len(volumeAttachment) == 0 {
return nil
}
mounts, err := rros.GetMounts(volumeAttachment[0].DeviceName, "")
if err != nil {
return err
}
if len(mounts) == 0 {
return nil
}
err = rros.Unmount(mounts[0].Mountpoint)
if err != nil {
return err
}
err = storage.DetachVolume(false, volumes[0].VolumeID, "")
if err != nil {
return err
}
return nil
}
// Mount will perform the steps to get an existing Volume with or without a fileystem mounted to a guest
func (driver *Driver) Mount(volumeName, volumeID string, overwriteFs bool, newFsType string) (string, error) {
if volumeName == "" && volumeID == "" {
return "", errors.New("Missing volume name or ID")
}
instances, err := storage.GetInstance()
if err != nil {
return "", err
}
switch {
case len(instances) == 0:
return "", errors.New("No instances")
case len(instances) > 1:
return "", errors.New("Too many instances returned, limit the storagedrivers")
}
volumes, err := storage.GetVolume(volumeID, volumeName)
if err != nil {
return "", err
}
switch {
case len(volumes) == 0:
return "", errors.New("No volumes returned by name")
case len(volumes) > 1:
return "", errors.New("Multiple volumes returned by name")
}
volumeAttachment, err := storage.GetVolumeAttach(volumes[0].VolumeID, instances[0].InstanceID)
if err != nil {
return "", err
}
if len(volumeAttachment) == 0 {
volumeAttachment, err = storage.AttachVolume(false, volumes[0].VolumeID, instances[0].InstanceID)
if err != nil {
return "", err
}
}
if len(volumeAttachment) == 0 {
return "", errors.New("Volume did not attach")
}
mounts, err := rros.GetMounts(volumeAttachment[0].DeviceName, "")
if err != nil {
return "", err
}
if len(mounts) > 0 {
return mounts[0].Mountpoint, nil
}
switch {
case os.Getenv("REXRAY_DOCKER_VOLUMETYPE") != "":
newFsType = os.Getenv("REXRAY_DOCKER_VOLUMETYPE")
case newFsType == "":
newFsType = "ext4"
}
if err := rros.Format(volumeAttachment[0].DeviceName, newFsType, overwriteFs); err != nil {
return "", err
}
mountPath, err := getVolumeMountPath(volumes[0].Name)
if err != nil {
return "", err
}
if err := os.MkdirAll(mountPath, 0755); err != nil {
return "", err
}
if err := rros.Mount(volumeAttachment[0].DeviceName, mountPath, "", ""); err != nil {
return "", err
}
return mountPath, nil
}