package weed_server import ( "fmt" "time" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb" "github.com/chrislusf/seaweedfs/weed/security" "github.com/chrislusf/seaweedfs/weed/storage" "golang.org/x/net/context" "google.golang.org/grpc" ) func (vs *VolumeServer) heartbeat() { glog.V(0).Infof("Volume server bootstraps with master %s", vs.GetMasterNode()) vs.masterNodes = storage.NewMasterNodes(vs.masterNode) vs.store.SetDataCenter(vs.dataCenter) vs.store.SetRack(vs.rack) for { err := vs.doHeartbeat(time.Duration(vs.pulseSeconds) * time.Second) if err != nil { glog.V(0).Infof("heartbeat error: %v", err) time.Sleep(time.Duration(vs.pulseSeconds) * time.Second) } } } func (vs *VolumeServer) doHeartbeat(sleepInterval time.Duration) error { vs.masterNodes.Reset() masterNode, err := vs.masterNodes.FindMaster() if err != nil { return fmt.Errorf("No master found: %v", err) } grpcConection, err := grpc.Dial(masterNode, grpc.WithInsecure()) if err != nil { return fmt.Errorf("fail to dial: %v", err) } defer grpcConection.Close() client := pb.NewSeaweedClient(grpcConection) stream, err := client.SendHeartbeat(context.Background()) if err != nil { glog.V(0).Infof("%v.SendHeartbeat(_) = _, %v", client, err) return err } vs.SetMasterNode(masterNode) glog.V(0).Infof("Heartbeat to %s", masterNode) vs.store.Client = stream defer func() { vs.store.Client = nil }() doneChan := make(chan error, 1) go func() { for { in, err := stream.Recv() if err != nil { doneChan <- err return } if in.GetVolumeSizeLimit() != 0 { vs.store.VolumeSizeLimit = in.GetVolumeSizeLimit() } if in.GetSecretKey() != "" { vs.guard.SecretKey = security.Secret(in.GetSecretKey()) } if in.GetLeader() != "" && masterNode != in.GetLeader() { vs.masterNodes.SetPossibleLeader(in.GetLeader()) doneChan <- nil return } } }() if err = stream.Send(vs.store.CollectHeartbeat()); err != nil { glog.V(0).Infof("Volume Server Failed to talk with master %s: %v", masterNode, err) return err } tickChan := time.Tick(sleepInterval) for { select { case <-tickChan: if err = stream.Send(vs.store.CollectHeartbeat()); err != nil { glog.V(0).Infof("Volume Server Failed to talk with master %s: %v", masterNode, err) return err } case err := <-doneChan: glog.V(0).Infof("Volume Server heart beat stops with %v", err) return err } } }