seaweedfs/weed/server/volume_grpc_client.go

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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)
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}
}
}
func (vs *VolumeServer) doHeartbeat(sleepInterval time.Duration) error {
vs.masterNodes.Reset()
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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)
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go func() {
for {
in, err := stream.Recv()
if err != nil {
doneChan <- err
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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
}
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}
}()
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)
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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)
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return err
}
}
}