display remote volumes on volume server ui page

weed/storage/store.go

@@ -144,6 +144,7 @@ func (s *Store) VolumeInfos() []*VolumeInfo {
 				Ttl:              v.Ttl,
 				CompactRevision:  uint32(v.CompactionRevision),
 			}
+			s.RemoteStorageName, s.RemoteStorageKey = v.RemoteStorageNameKey()
 			stats = append(stats, s)
 		}
 		location.volumesLock.RUnlock()

weed/storage/volume.go

@@ -203,7 +203,7 @@ func (v *Volume) expiredLongEnough(maxDelayMinutes uint32) bool {
 func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessage {
 	size, _, modTime := v.FileStat()
 
-	return &master_pb.VolumeInformationMessage{
+	volumInfo := &master_pb.VolumeInformationMessage{
 		Id:               uint32(v.Id),
 		Size:             size,
 		Collection:       v.Collection,
@@ -217,4 +217,15 @@ func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessag
 		CompactRevision:  uint32(v.SuperBlock.CompactionRevision),
 		ModifiedAtSecond: modTime.Unix(),
 	}
+
+	volumInfo.RemoteStorageName, volumInfo.RemoteStorageKey = v.RemoteStorageNameKey()
+
+	return volumInfo
+}
+
+func (v *Volume) RemoteStorageNameKey() (storageName, storageKey string) {
+	if len(v.volumeTierInfo.GetFiles()) == 0 {
+		return
+	}
+	return v.volumeTierInfo.GetFiles()[0].BackendName(), v.volumeTierInfo.GetFiles()[0].GetKey()
 }

weed/storage/volume_info.go

@@ -9,18 +9,20 @@ import (
 )
 
 type VolumeInfo struct {
-	Id               needle.VolumeId
-	Size             uint64
-	ReplicaPlacement *ReplicaPlacement
-	Ttl              *needle.TTL
-	Collection       string
-	Version          needle.Version
-	FileCount        int
-	DeleteCount      int
-	DeletedByteCount uint64
-	ReadOnly         bool
-	CompactRevision  uint32
-	ModifiedAtSecond int64
+	Id                needle.VolumeId
+	Size              uint64
+	ReplicaPlacement  *ReplicaPlacement
+	Ttl               *needle.TTL
+	Collection        string
+	Version           needle.Version
+	FileCount         int
+	DeleteCount       int
+	DeletedByteCount  uint64
+	ReadOnly          bool
+	CompactRevision   uint32
+	ModifiedAtSecond  int64
+	RemoteStorageName string
+	RemoteStorageKey  string
 }
 
 func NewVolumeInfo(m *master_pb.VolumeInformationMessage) (vi VolumeInfo, err error) {