// migrateCustomImageMetadata copies uploaded image metadata from provider // storage to environment storage, preserving paths. func migrateCustomImageMetadata(st *state.State, agentConfig agent.Config) error { logger.Debugf("migrating custom image metadata to environment storage") estor := newStateStorage(st.EnvironUUID(), st.MongoSession()) // Local and manual provider host storage on the state server's // filesystem, and serve via HTTP storage. The storage worker // doesn't run yet, so we just open the files directly. var pstor storage.StorageReader providerType := agentConfig.Value(agent.ProviderType) if providerType == provider.Local || provider.IsManual(providerType) { storageDir := agentConfig.Value(agent.StorageDir) var err error pstor, err = filestorage.NewFileStorageReader(storageDir) if err != nil { return errors.Annotate(err, "cannot get local filesystem storage reader") } } else { var err error pstor, err = environs.LegacyStorage(st) if errors.IsNotSupported(err) { return nil } else if err != nil { return errors.Annotate(err, "cannot get provider storage") } } paths, err := pstor.List(storage.BaseImagesPath) if err != nil { return err } for _, path := range paths { logger.Infof("migrating image metadata at path %q", path) data, err := readImageMetadata(pstor, path) if err != nil { return errors.Annotate(err, "failed to read image metadata") } err = estor.Put(path, bytes.NewReader(data), int64(len(data))) if err != nil { return errors.Annotate(err, "failed to write image metadata") } } return nil }