When the volume server is stopped, the master server immediately sees the deletion of volumes

weed/server/volume_grpc_client_to_master.go

@@ -216,6 +216,23 @@ func (vs *VolumeServer) doHeartbeat(masterNode, masterGrpcAddress string, grpcDi
 		case err = <-doneChan:
 			return
 		case <-vs.stopChan:
+			var volumeMessages []*master_pb.VolumeInformationMessage
+			emptyBeat := &master_pb.Heartbeat{
+				Ip:             vs.store.Ip,
+				Port:           uint32(vs.store.Port),
+				PublicUrl:      vs.store.PublicUrl,
+				MaxVolumeCount: uint32(0),
+				MaxFileKey:     uint64(0),
+				DataCenter:     vs.store.GetDataCenter(),
+				Rack:           vs.store.GetRack(),
+				Volumes:        volumeMessages,
+				HasNoVolumes:   len(volumeMessages) == 0,
+			}
+			glog.V(1).Infof("volume server %s:%d deletes all volumes", vs.store.Ip, vs.store.Port)
+			if err = stream.Send(emptyBeat); err != nil {
+				glog.V(0).Infof("Volume Server Failed to update to master %s: %v", masterNode, err)
+				return "", err
+			}
 			return
 		}
 	}

weed/storage/store.go

@@ -194,6 +194,12 @@ func (s *Store) SetDataCenter(dataCenter string) {
 func (s *Store) SetRack(rack string) {
 	s.rack = rack
 }
+func (s *Store) GetDataCenter() string {
+	return s.dataCenter
+}
+func (s *Store) GetRack() string {
+	return s.rack
+}
 
 func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 	var volumeMessages []*master_pb.VolumeInformationMessage
@@ -229,7 +235,6 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 				}
 			}
 			if v.IsReadOnly() {
-				collectionVolumeReadOnlyCount[v.Collection] = make(map[string]uint8)
 				collectionVolumeReadOnlyCount[v.Collection]["IsReadOnly"] += 1
 				if v.noWriteOrDelete {
 					collectionVolumeReadOnlyCount[v.Collection]["noWriteOrDelete"] += 1