// AddStore adds a volumestore by uri.
//
// ds is the Datastore (+ path) volumes will be created under.
// The resulting path will be parentDir/VIC/volumes.
// storeName is the name used to refer to the datastore + path (ds above).
//
// returns the URL used to refer to the volume store
func (v *VolumeStore) AddStore(ctx context.Context, ds *datastore.Helper, storeName string) (*url.URL, error) {
u, err := util.VolumeStoreNameToURL(storeName)
if err != nil {
return nil, err
}
if _, ok := v.ds[*u]; ok {
return nil, fmt.Errorf("volumestore (%s) already added", u.String())
}
if _, err = ds.Mkdir(ctx, true, volumesDir); err != nil {
return nil, err
}
v.ds[*u] = ds
return u, nil
}
// AddStore adds a volumestore by uri.
//
// ds is the Datastore (+ path) volumes will be created under.
// The resulting path will be parentDir/VIC/volumes.
// storeName is the name used to refer to the datastore + path (ds above).
//
// returns the URL used to refer to the volume store
func (v *VolumeStore) AddStore(op trace.Operation, ds *datastore.Helper, storeName string) (*url.URL, error) {
v.dsLock.Lock()
defer v.dsLock.Unlock()
u, err := util.VolumeStoreNameToURL(storeName)
if err != nil {
return nil, err
}
if _, ok := v.ds[*u]; ok {
return nil, fmt.Errorf("volumestore (%s) already added", u.String())
}
if _, err = ds.Mkdir(op, true, VolumesDir); err != nil && !os.IsExist(err) {
return nil, err
}
v.ds[*u] = ds
return u, nil
}
// Write the opaque metadata blobs (by name).
// Each blob in the metadata map is written to a file with the corresponding
// name. Likewise, when we read it back (on restart) we populate the map
// accordingly.
func writeMetadata(ctx context.Context, ds *datastore.Helper, dir string, meta map[string][]byte) error {
// XXX this should be done via disklib so this meta follows the disk in
// case of motion.
if meta != nil && len(meta) != 0 {
for name, value := range meta {
r := bytes.NewReader(value)
pth := path.Join(dir, name)
log.Infof("Writing metadata %s", pth)
if err := ds.Upload(ctx, r, pth); err != nil {
return err
}
}
} else {
if _, err := ds.Mkdir(ctx, false, dir); err != nil {
return err
}
}
return nil
}
// Read the metadata from the given dir
func getMetadata(ctx context.Context, ds *datastore.Helper, dir string) (map[string][]byte, error) {
res, err := ds.Ls(ctx, dir)
if err != nil {
return nil, err
}
if len(res.File) == 0 {
log.Infof("No meta found for %s", dir)
return nil, nil
}
meta := make(map[string][]byte)
for _, f := range res.File {
finfo, ok := f.(*types.FileInfo)
if !ok {
continue
}
p := path.Join(dir, finfo.Path)
log.Infof("Getting metadata %s", p)
rc, err := ds.Download(ctx, p)
if err != nil {
return nil, err
}
defer rc.Close()
buf, err := ioutil.ReadAll(rc)
if err != nil {
return nil, err
}
meta[finfo.Path] = buf
}
return meta, nil
}