cleanly destroy remote files

weed/storage/volume.go

@@ -225,6 +225,9 @@ func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessag
 }
 
 func (v *Volume) RemoteStorageNameKey() (storageName, storageKey string) {
+	if v.volumeTierInfo == nil {
+		return
+	}
 	if len(v.volumeTierInfo.GetFiles()) == 0 {
 		return
 	}

weed/storage/volume_read_write.go

@@ -46,6 +46,12 @@ func (v *Volume) Destroy() (err error) {
 		err = fmt.Errorf("volume %d is compacting", v.Id)
 		return
 	}
+	storageName, storageKey := v.RemoteStorageNameKey()
+	if v.HasRemoteFile() && storageName != "" && storageKey != "" {
+		if backendStorage, found := backend.BackendStorages[storageName]; found {
+			backendStorage.DeleteFile(storageKey)
+		}
+	}
 	v.Close()
 	os.Remove(v.FileName() + ".dat")
 	os.Remove(v.FileName() + ".idx")

weed/storage/volume_tier.go

@@ -66,6 +66,14 @@ func (v *Volume) maybeLoadVolumeTierInfo() bool {
 	return true
 }
 
+func (v *Volume) HasRemoteFile() bool {
+	if v.DataBackend == nil {
+		return false
+	}
+	_, ok := v.DataBackend.(*backend.DiskFile)
+	return !ok
+}
+
 func (v *Volume) LoadRemoteFile() error {
 	tierFile := v.volumeTierInfo.GetFiles()[0]
 	backendStorage := backend.BackendStorages[tierFile.BackendName()]