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|
package weed_server
import (
"fmt"
"net"
"strings"
"github.com/chrislusf/raft"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/topology"
"google.golang.org/grpc/peer"
)
func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServer) error {
var dn *topology.DataNode
t := ms.Topo
defer func() {
if dn != nil {
glog.V(0).Infof("unregister disconnected volume server %s:%d", dn.Ip, dn.Port)
t.UnRegisterDataNode(dn)
message := &master_pb.VolumeLocation{
Url: dn.Url(),
PublicUrl: dn.PublicUrl,
}
for _, v := range dn.GetVolumes() {
message.DeletedVids = append(message.DeletedVids, uint32(v.Id))
}
if len(message.DeletedVids) > 0 {
ms.clientChansLock.RLock()
for _, ch := range ms.clientChans {
ch <- message
}
ms.clientChansLock.RUnlock()
}
}
}()
for {
heartbeat, err := stream.Recv()
if err != nil {
return err
}
if dn == nil {
t.Sequence.SetMax(heartbeat.MaxFileKey)
if heartbeat.Ip == "" {
if pr, ok := peer.FromContext(stream.Context()); ok {
if pr.Addr != net.Addr(nil) {
heartbeat.Ip = pr.Addr.String()[0:strings.LastIndex(pr.Addr.String(), ":")]
glog.V(0).Infof("remote IP address is detected as %v", heartbeat.Ip)
}
}
}
dcName, rackName := t.Configuration.Locate(heartbeat.Ip, heartbeat.DataCenter, heartbeat.Rack)
dc := t.GetOrCreateDataCenter(dcName)
rack := dc.GetOrCreateRack(rackName)
dn = rack.GetOrCreateDataNode(heartbeat.Ip,
int(heartbeat.Port), heartbeat.PublicUrl,
int(heartbeat.MaxVolumeCount))
glog.V(0).Infof("added volume server %v:%d", heartbeat.GetIp(), heartbeat.GetPort())
if err := stream.Send(&master_pb.HeartbeatResponse{
VolumeSizeLimit: uint64(ms.volumeSizeLimitMB) * 1024 * 1024,
SecretKey: string(ms.guard.SecretKey),
}); err != nil {
return err
}
}
message := &master_pb.VolumeLocation{
Url: dn.Url(),
PublicUrl: dn.PublicUrl,
}
if len(heartbeat.NewVids) > 0 || len(heartbeat.DeletedVids) > 0 {
// process delta volume ids if exists for fast volume id updates
message.NewVids = append(message.NewVids, heartbeat.NewVids...)
message.DeletedVids = append(message.DeletedVids, heartbeat.DeletedVids...)
} else {
// process heartbeat.Volumes
newVolumes, deletedVolumes := t.SyncDataNodeRegistration(heartbeat.Volumes, dn)
for _, v := range newVolumes {
message.NewVids = append(message.NewVids, uint32(v.Id))
}
for _, v := range deletedVolumes {
message.DeletedVids = append(message.DeletedVids, uint32(v.Id))
}
}
if len(message.NewVids) > 0 || len(message.DeletedVids) > 0 {
ms.clientChansLock.RLock()
for _, ch := range ms.clientChans {
ch <- message
}
ms.clientChansLock.RUnlock()
}
// tell the volume servers about the leader
newLeader, err := t.Leader()
if err == nil {
if err := stream.Send(&master_pb.HeartbeatResponse{
Leader: newLeader,
}); err != nil {
return err
}
}
}
}
// KeepConnected keep a stream gRPC call to the master. Used by clients to know the master is up.
// And clients gets the up-to-date list of volume locations
func (ms *MasterServer) KeepConnected(stream master_pb.Seaweed_KeepConnectedServer) error {
req, err := stream.Recv()
if err != nil {
return err
}
if !ms.Topo.IsLeader() {
return raft.NotLeaderError
}
// remember client address
ctx := stream.Context()
// fmt.Printf("FromContext %+v\n", ctx)
pr, ok := peer.FromContext(ctx)
if !ok {
glog.Error("failed to get peer from ctx")
return fmt.Errorf("failed to get peer from ctx")
}
if pr.Addr == net.Addr(nil) {
glog.Error("failed to get peer address")
return fmt.Errorf("failed to get peer address")
}
clientName := req.Name + pr.Addr.String()
glog.V(0).Infof("+ client %v", clientName)
messageChan := make(chan *master_pb.VolumeLocation)
stopChan := make(chan bool)
ms.clientChansLock.Lock()
ms.clientChans[clientName] = messageChan
ms.clientChansLock.Unlock()
defer func() {
glog.V(0).Infof("- client %v", clientName)
ms.clientChansLock.Lock()
delete(ms.clientChans, clientName)
ms.clientChansLock.Unlock()
}()
for _, message := range ms.Topo.ToVolumeLocations() {
if err := stream.Send(message); err != nil {
return err
}
}
go func() {
for {
_, err := stream.Recv()
if err != nil {
glog.V(2).Infof("- client %v: %v", clientName, err)
stopChan <- true
break
}
}
}()
for {
select {
case message := <-messageChan:
if err := stream.Send(message); err != nil {
glog.V(0).Infof("=> client %v: %+v", clientName, message)
return err
}
case <-stopChan:
return nil
}
}
return nil
}
|
