mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
322 lines
9.3 KiB
Go
322 lines
9.3 KiB
Go
package weed_server
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import (
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"context"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/storage/backend"
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"net"
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"strings"
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"time"
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"github.com/chrislusf/raft"
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"google.golang.org/grpc/peer"
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"github.com/chrislusf/seaweedfs/weed/util/log"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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"github.com/chrislusf/seaweedfs/weed/topology"
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)
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func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServer) error {
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var dn *topology.DataNode
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defer func() {
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if dn != nil {
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// if the volume server disconnects and reconnects quickly
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// the unregister and register can race with each other
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ms.Topo.UnRegisterDataNode(dn)
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log.Infof("unregister disconnected volume server %s:%d", dn.Ip, dn.Port)
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message := &master_pb.VolumeLocation{
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Url: dn.Url(),
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PublicUrl: dn.PublicUrl,
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}
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for _, v := range dn.GetVolumes() {
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message.DeletedVids = append(message.DeletedVids, uint32(v.Id))
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}
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for _, s := range dn.GetEcShards() {
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message.DeletedVids = append(message.DeletedVids, uint32(s.VolumeId))
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}
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if len(message.DeletedVids) > 0 {
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ms.clientChansLock.RLock()
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for _, ch := range ms.clientChans {
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ch <- message
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}
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ms.clientChansLock.RUnlock()
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}
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}
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}()
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for {
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heartbeat, err := stream.Recv()
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if err != nil {
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if dn != nil {
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log.Warnf("SendHeartbeat.Recv server %s:%d : %v", dn.Ip, dn.Port, err)
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} else {
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log.Warnf("SendHeartbeat.Recv: %v", err)
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}
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return err
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}
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ms.Topo.Sequence.SetMax(heartbeat.MaxFileKey)
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if dn == nil {
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dcName, rackName := ms.Topo.Configuration.Locate(heartbeat.Ip, heartbeat.DataCenter, heartbeat.Rack)
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dc := ms.Topo.GetOrCreateDataCenter(dcName)
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rack := dc.GetOrCreateRack(rackName)
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dn = rack.GetOrCreateDataNode(heartbeat.Ip,
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int(heartbeat.Port), heartbeat.PublicUrl,
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int64(heartbeat.MaxVolumeCount))
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log.Infof("added volume server %v:%d", heartbeat.GetIp(), heartbeat.GetPort())
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if err := stream.Send(&master_pb.HeartbeatResponse{
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VolumeSizeLimit: uint64(ms.option.VolumeSizeLimitMB) * 1024 * 1024,
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}); err != nil {
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log.Warnf("SendHeartbeat.Send volume size to %s:%d %v", dn.Ip, dn.Port, err)
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return err
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}
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}
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if heartbeat.MaxVolumeCount != 0 && dn.GetMaxVolumeCount() != int64(heartbeat.MaxVolumeCount) {
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delta := int64(heartbeat.MaxVolumeCount) - dn.GetMaxVolumeCount()
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dn.UpAdjustMaxVolumeCountDelta(delta)
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}
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log.Tracef("master received heartbeat %s", heartbeat.String())
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message := &master_pb.VolumeLocation{
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Url: dn.Url(),
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PublicUrl: dn.PublicUrl,
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DataCenter: string(dn.GetDataCenter().Id()),
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}
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if len(heartbeat.NewVolumes) > 0 || len(heartbeat.DeletedVolumes) > 0 {
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// process delta volume ids if exists for fast volume id updates
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for _, volInfo := range heartbeat.NewVolumes {
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message.NewVids = append(message.NewVids, volInfo.Id)
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}
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for _, volInfo := range heartbeat.DeletedVolumes {
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message.DeletedVids = append(message.DeletedVids, volInfo.Id)
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}
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// update master internal volume layouts
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ms.Topo.IncrementalSyncDataNodeRegistration(heartbeat.NewVolumes, heartbeat.DeletedVolumes, dn)
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}
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if len(heartbeat.Volumes) > 0 || heartbeat.HasNoVolumes {
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// process heartbeat.Volumes
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newVolumes, deletedVolumes := ms.Topo.SyncDataNodeRegistration(heartbeat.Volumes, dn)
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for _, v := range newVolumes {
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log.Infof("master see new volume %d from %s", uint32(v.Id), dn.Url())
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message.NewVids = append(message.NewVids, uint32(v.Id))
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}
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for _, v := range deletedVolumes {
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log.Infof("master see deleted volume %d from %s", uint32(v.Id), dn.Url())
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message.DeletedVids = append(message.DeletedVids, uint32(v.Id))
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}
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}
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if len(heartbeat.NewEcShards) > 0 || len(heartbeat.DeletedEcShards) > 0 {
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// update master internal volume layouts
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ms.Topo.IncrementalSyncDataNodeEcShards(heartbeat.NewEcShards, heartbeat.DeletedEcShards, dn)
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for _, s := range heartbeat.NewEcShards {
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message.NewVids = append(message.NewVids, s.Id)
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}
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for _, s := range heartbeat.DeletedEcShards {
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if dn.HasVolumesById(needle.VolumeId(s.Id)) {
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continue
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}
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message.DeletedVids = append(message.DeletedVids, s.Id)
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}
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}
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if len(heartbeat.EcShards) > 0 || heartbeat.HasNoEcShards {
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log.Debugf("master received ec shards from %s: %+v", dn.Url(), heartbeat.EcShards)
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newShards, deletedShards := ms.Topo.SyncDataNodeEcShards(heartbeat.EcShards, dn)
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// broadcast the ec vid changes to master clients
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for _, s := range newShards {
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message.NewVids = append(message.NewVids, uint32(s.VolumeId))
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}
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for _, s := range deletedShards {
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if dn.HasVolumesById(s.VolumeId) {
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continue
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}
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message.DeletedVids = append(message.DeletedVids, uint32(s.VolumeId))
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}
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}
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if len(message.NewVids) > 0 || len(message.DeletedVids) > 0 {
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ms.clientChansLock.RLock()
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for host, ch := range ms.clientChans {
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log.Infof("master send to %s: %s", host, message.String())
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ch <- message
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}
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ms.clientChansLock.RUnlock()
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}
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// tell the volume servers about the leader
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newLeader, err := ms.Topo.Leader()
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if err != nil {
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log.Warnf("SendHeartbeat find leader: %v", err)
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return err
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}
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if err := stream.Send(&master_pb.HeartbeatResponse{
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Leader: newLeader,
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}); err != nil {
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log.Warnf("SendHeartbeat.Send response to to %s:%d %v", dn.Ip, dn.Port, err)
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return err
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}
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}
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}
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// KeepConnected keep a stream gRPC call to the master. Used by clients to know the master is up.
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// And clients gets the up-to-date list of volume locations
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func (ms *MasterServer) KeepConnected(stream master_pb.Seaweed_KeepConnectedServer) error {
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req, err := stream.Recv()
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if err != nil {
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return err
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}
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if !ms.Topo.IsLeader() {
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return ms.informNewLeader(stream)
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}
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peerAddress := findClientAddress(stream.Context(), req.GrpcPort)
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// buffer by 1 so we don't end up getting stuck writing to stopChan forever
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stopChan := make(chan bool, 1)
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clientName, messageChan := ms.addClient(req.Name, peerAddress)
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defer ms.deleteClient(clientName)
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for _, message := range ms.Topo.ToVolumeLocations() {
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if err := stream.Send(message); err != nil {
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return err
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}
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}
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go func() {
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for {
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_, err := stream.Recv()
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if err != nil {
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log.Debugf("- client %v: %v", clientName, err)
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stopChan <- true
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break
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}
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}
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}()
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ticker := time.NewTicker(5 * time.Second)
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for {
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select {
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case message := <-messageChan:
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if err := stream.Send(message); err != nil {
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log.Infof("=> client %v: %+v", clientName, message)
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return err
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}
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case <-ticker.C:
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if !ms.Topo.IsLeader() {
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return ms.informNewLeader(stream)
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}
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case <-stopChan:
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return nil
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}
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}
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}
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func (ms *MasterServer) informNewLeader(stream master_pb.Seaweed_KeepConnectedServer) error {
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leader, err := ms.Topo.Leader()
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if err != nil {
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log.Errorf("topo leader: %v", err)
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return raft.NotLeaderError
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}
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if err := stream.Send(&master_pb.VolumeLocation{
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Leader: leader,
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}); err != nil {
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return err
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}
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return nil
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}
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func (ms *MasterServer) addClient(clientType string, clientAddress string) (clientName string, messageChan chan *master_pb.VolumeLocation) {
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clientName = clientType + "@" + clientAddress
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log.Infof("+ client %v", clientName)
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// we buffer this because otherwise we end up in a potential deadlock where
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// the KeepConnected loop is no longer listening on this channel but we're
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// trying to send to it in SendHeartbeat and so we can't lock the
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// clientChansLock to remove the channel and we're stuck writing to it
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// 100 is probably overkill
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messageChan = make(chan *master_pb.VolumeLocation, 100)
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ms.clientChansLock.Lock()
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ms.clientChans[clientName] = messageChan
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ms.clientChansLock.Unlock()
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return
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}
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func (ms *MasterServer) deleteClient(clientName string) {
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log.Infof("- client %v", clientName)
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ms.clientChansLock.Lock()
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delete(ms.clientChans, clientName)
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ms.clientChansLock.Unlock()
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}
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func findClientAddress(ctx context.Context, grpcPort uint32) string {
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// fmt.Printf("FromContext %+v\n", ctx)
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pr, ok := peer.FromContext(ctx)
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if !ok {
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log.Error("failed to get peer from ctx")
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return ""
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}
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if pr.Addr == net.Addr(nil) {
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log.Error("failed to get peer address")
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return ""
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}
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if grpcPort == 0 {
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return pr.Addr.String()
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}
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if tcpAddr, ok := pr.Addr.(*net.TCPAddr); ok {
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externalIP := tcpAddr.IP
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return fmt.Sprintf("%s:%d", externalIP, grpcPort)
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}
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return pr.Addr.String()
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}
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func (ms *MasterServer) ListMasterClients(ctx context.Context, req *master_pb.ListMasterClientsRequest) (*master_pb.ListMasterClientsResponse, error) {
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resp := &master_pb.ListMasterClientsResponse{}
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ms.clientChansLock.RLock()
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defer ms.clientChansLock.RUnlock()
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for k := range ms.clientChans {
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if strings.HasPrefix(k, req.ClientType+"@") {
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resp.GrpcAddresses = append(resp.GrpcAddresses, k[len(req.ClientType)+1:])
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}
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}
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return resp, nil
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}
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func (ms *MasterServer) GetMasterConfiguration(ctx context.Context, req *master_pb.GetMasterConfigurationRequest) (*master_pb.GetMasterConfigurationResponse, error) {
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// tell the volume servers about the leader
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leader, _ := ms.Topo.Leader()
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resp := &master_pb.GetMasterConfigurationResponse{
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MetricsAddress: ms.option.MetricsAddress,
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MetricsIntervalSeconds: uint32(ms.option.MetricsIntervalSec),
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StorageBackends: backend.ToPbStorageBackends(),
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DefaultReplication: ms.option.DefaultReplicaPlacement,
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Leader: leader,
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}
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return resp, nil
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}
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