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328 lines
11 KiB
328 lines
11 KiB
package wdclient
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import (
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"context"
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"fmt"
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"math/rand"
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"sync"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/stats"
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"github.com/seaweedfs/seaweedfs/weed/util"
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"google.golang.org/grpc"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
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)
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type MasterClient struct {
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FilerGroup string
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clientType string
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clientHost pb.ServerAddress
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rack string
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currentMaster pb.ServerAddress
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currentMasterLock sync.RWMutex
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masters pb.ServerDiscovery
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grpcDialOption grpc.DialOption
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*vidMap
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vidMapCacheSize int
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OnPeerUpdate func(update *master_pb.ClusterNodeUpdate, startFrom time.Time)
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OnPeerUpdateLock sync.RWMutex
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}
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func NewMasterClient(grpcDialOption grpc.DialOption, filerGroup string, clientType string, clientHost pb.ServerAddress, clientDataCenter string, rack string, masters pb.ServerDiscovery) *MasterClient {
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return &MasterClient{
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FilerGroup: filerGroup,
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clientType: clientType,
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clientHost: clientHost,
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rack: rack,
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masters: masters,
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grpcDialOption: grpcDialOption,
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vidMap: newVidMap(clientDataCenter),
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vidMapCacheSize: 5,
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}
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}
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func (mc *MasterClient) SetOnPeerUpdateFn(onPeerUpdate func(update *master_pb.ClusterNodeUpdate, startFrom time.Time)) {
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mc.OnPeerUpdateLock.Lock()
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mc.OnPeerUpdate = onPeerUpdate
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mc.OnPeerUpdateLock.Unlock()
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}
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func (mc *MasterClient) GetLookupFileIdFunction() LookupFileIdFunctionType {
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return mc.LookupFileIdWithFallback
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}
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func (mc *MasterClient) LookupFileIdWithFallback(fileId string) (fullUrls []string, err error) {
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fullUrls, err = mc.vidMap.LookupFileId(fileId)
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if err == nil && len(fullUrls) > 0 {
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return
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}
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err = pb.WithMasterClient(false, mc.GetMaster(), mc.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
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resp, err := client.LookupVolume(context.Background(), &master_pb.LookupVolumeRequest{
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VolumeOrFileIds: []string{fileId},
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})
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if err != nil {
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return fmt.Errorf("LookupVolume %s failed: %v", fileId, err)
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}
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for vid, vidLocation := range resp.VolumeIdLocations {
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for _, vidLoc := range vidLocation.Locations {
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loc := Location{
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Url: vidLoc.Url,
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PublicUrl: vidLoc.PublicUrl,
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GrpcPort: int(vidLoc.GrpcPort),
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DataCenter: vidLoc.DataCenter,
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}
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mc.vidMap.addLocation(uint32(vid), loc)
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httpUrl := "http://" + loc.Url + "/" + fileId
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// Prefer same data center
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if mc.DataCenter != "" && mc.DataCenter == loc.DataCenter {
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fullUrls = append([]string{httpUrl}, fullUrls...)
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} else {
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fullUrls = append(fullUrls, httpUrl)
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}
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}
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}
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return nil
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})
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return
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}
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func (mc *MasterClient) getCurrentMaster() pb.ServerAddress {
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mc.currentMasterLock.RLock()
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defer mc.currentMasterLock.RUnlock()
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return mc.currentMaster
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}
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func (mc *MasterClient) setCurrentMaster(master pb.ServerAddress) {
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mc.currentMasterLock.Lock()
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mc.currentMaster = master
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mc.currentMasterLock.Unlock()
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}
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func (mc *MasterClient) GetMaster() pb.ServerAddress {
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mc.WaitUntilConnected()
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return mc.getCurrentMaster()
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}
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func (mc *MasterClient) GetMasters() []pb.ServerAddress {
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mc.WaitUntilConnected()
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return mc.masters.GetInstances()
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}
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func (mc *MasterClient) WaitUntilConnected() {
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for {
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if mc.getCurrentMaster() != "" {
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return
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}
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time.Sleep(time.Duration(rand.Int31n(200)) * time.Millisecond)
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print(".")
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}
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}
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func (mc *MasterClient) KeepConnectedToMaster() {
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glog.V(1).Infof("%s.%s masterClient bootstraps with masters %v", mc.FilerGroup, mc.clientType, mc.masters)
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for {
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mc.tryAllMasters()
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time.Sleep(time.Second)
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}
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}
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func (mc *MasterClient) FindLeaderFromOtherPeers(myMasterAddress pb.ServerAddress) (leader string) {
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for _, master := range mc.masters.GetInstances() {
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if master == myMasterAddress {
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continue
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}
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if grpcErr := pb.WithMasterClient(false, master, mc.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
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ctx, cancel := context.WithTimeout(context.Background(), 120*time.Millisecond)
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defer cancel()
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resp, err := client.GetMasterConfiguration(ctx, &master_pb.GetMasterConfigurationRequest{})
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if err != nil {
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return err
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}
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leader = resp.Leader
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return nil
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}); grpcErr != nil {
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glog.V(0).Infof("connect to %s: %v", master, grpcErr)
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}
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if leader != "" {
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glog.V(0).Infof("existing leader is %s", leader)
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return
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}
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}
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glog.V(0).Infof("No existing leader found!")
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return
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}
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func (mc *MasterClient) tryAllMasters() {
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var nextHintedLeader pb.ServerAddress
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mc.masters.RefreshBySrvIfAvailable()
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for _, master := range mc.masters.GetInstances() {
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nextHintedLeader = mc.tryConnectToMaster(master)
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for nextHintedLeader != "" {
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nextHintedLeader = mc.tryConnectToMaster(nextHintedLeader)
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}
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mc.setCurrentMaster("")
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}
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}
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func (mc *MasterClient) tryConnectToMaster(master pb.ServerAddress) (nextHintedLeader pb.ServerAddress) {
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glog.V(1).Infof("%s.%s masterClient Connecting to master %v", mc.FilerGroup, mc.clientType, master)
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stats.MasterClientConnectCounter.WithLabelValues("total").Inc()
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gprcErr := pb.WithMasterClient(true, master, mc.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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stream, err := client.KeepConnected(ctx)
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if err != nil {
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glog.V(1).Infof("%s.%s masterClient failed to keep connected to %s: %v", mc.FilerGroup, mc.clientType, master, err)
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stats.MasterClientConnectCounter.WithLabelValues(stats.FailedToKeepConnected).Inc()
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return err
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}
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if err = stream.Send(&master_pb.KeepConnectedRequest{
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FilerGroup: mc.FilerGroup,
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DataCenter: mc.DataCenter,
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Rack: mc.rack,
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ClientType: mc.clientType,
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ClientAddress: string(mc.clientHost),
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Version: util.Version(),
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}); err != nil {
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glog.V(0).Infof("%s.%s masterClient failed to send to %s: %v", mc.FilerGroup, mc.clientType, master, err)
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stats.MasterClientConnectCounter.WithLabelValues(stats.FailedToSend).Inc()
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return err
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}
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glog.V(1).Infof("%s.%s masterClient Connected to %v", mc.FilerGroup, mc.clientType, master)
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resp, err := stream.Recv()
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if err != nil {
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glog.V(0).Infof("%s.%s masterClient failed to receive from %s: %v", mc.FilerGroup, mc.clientType, master, err)
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stats.MasterClientConnectCounter.WithLabelValues(stats.FailedToReceive).Inc()
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return err
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}
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// check if it is the leader to determine whether to reset the vidMap
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if resp.VolumeLocation != nil {
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if resp.VolumeLocation.Leader != "" && string(master) != resp.VolumeLocation.Leader {
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glog.V(0).Infof("master %v redirected to leader %v", master, resp.VolumeLocation.Leader)
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nextHintedLeader = pb.ServerAddress(resp.VolumeLocation.Leader)
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stats.MasterClientConnectCounter.WithLabelValues(stats.RedirectedToLeader).Inc()
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return nil
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}
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mc.resetVidMap()
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mc.updateVidMap(resp)
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} else {
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mc.resetVidMap()
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}
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mc.setCurrentMaster(master)
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for {
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resp, err := stream.Recv()
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if err != nil {
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glog.V(0).Infof("%s.%s masterClient failed to receive from %s: %v", mc.FilerGroup, mc.clientType, master, err)
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stats.MasterClientConnectCounter.WithLabelValues(stats.FailedToReceive).Inc()
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return err
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}
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if resp.VolumeLocation != nil {
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// maybe the leader is changed
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if resp.VolumeLocation.Leader != "" && string(mc.GetMaster()) != resp.VolumeLocation.Leader {
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glog.V(0).Infof("currentMaster %v redirected to leader %v", mc.GetMaster(), resp.VolumeLocation.Leader)
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nextHintedLeader = pb.ServerAddress(resp.VolumeLocation.Leader)
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stats.MasterClientConnectCounter.WithLabelValues(stats.RedirectedToLeader).Inc()
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return nil
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}
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mc.updateVidMap(resp)
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}
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if resp.ClusterNodeUpdate != nil {
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update := resp.ClusterNodeUpdate
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mc.OnPeerUpdateLock.RLock()
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if mc.OnPeerUpdate != nil {
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if update.FilerGroup == mc.FilerGroup {
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if update.IsAdd {
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glog.V(0).Infof("+ %s.%s %s\n", update.FilerGroup, update.NodeType, update.Address)
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} else {
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glog.V(0).Infof("- %s.%s %s\n", update.FilerGroup, update.NodeType, update.Address)
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}
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stats.MasterClientConnectCounter.WithLabelValues(stats.OnPeerUpdate).Inc()
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mc.OnPeerUpdate(update, time.Now())
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}
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}
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mc.OnPeerUpdateLock.RUnlock()
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}
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}
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})
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if gprcErr != nil {
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stats.MasterClientConnectCounter.WithLabelValues(stats.Failed).Inc()
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glog.V(1).Infof("%s.%s masterClient failed to connect with master %v: %v", mc.FilerGroup, mc.clientType, master, gprcErr)
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}
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return
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}
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func (mc *MasterClient) updateVidMap(resp *master_pb.KeepConnectedResponse) {
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if resp.VolumeLocation.IsEmptyUrl() {
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glog.V(0).Infof("updateVidMap ignore short heartbeat: %+v", resp)
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return
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}
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// process new volume location
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loc := Location{
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Url: resp.VolumeLocation.Url,
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PublicUrl: resp.VolumeLocation.PublicUrl,
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DataCenter: resp.VolumeLocation.DataCenter,
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GrpcPort: int(resp.VolumeLocation.GrpcPort),
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}
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for _, newVid := range resp.VolumeLocation.NewVids {
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glog.V(2).Infof("%s.%s: %s masterClient adds volume %d", mc.FilerGroup, mc.clientType, loc.Url, newVid)
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mc.addLocation(newVid, loc)
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}
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for _, deletedVid := range resp.VolumeLocation.DeletedVids {
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glog.V(2).Infof("%s.%s: %s masterClient removes volume %d", mc.FilerGroup, mc.clientType, loc.Url, deletedVid)
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mc.deleteLocation(deletedVid, loc)
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}
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for _, newEcVid := range resp.VolumeLocation.NewEcVids {
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glog.V(2).Infof("%s.%s: %s masterClient adds ec volume %d", mc.FilerGroup, mc.clientType, loc.Url, newEcVid)
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mc.addEcLocation(newEcVid, loc)
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}
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for _, deletedEcVid := range resp.VolumeLocation.DeletedEcVids {
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glog.V(2).Infof("%s.%s: %s masterClient removes ec volume %d", mc.FilerGroup, mc.clientType, loc.Url, deletedEcVid)
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mc.deleteEcLocation(deletedEcVid, loc)
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}
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glog.V(1).Infof("updateVidMap(%s) %s.%s: %s volume add: %d, del: %d, add ec: %d del ec: %d",
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resp.VolumeLocation.DataCenter, mc.FilerGroup, mc.clientType, loc.Url,
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len(resp.VolumeLocation.NewVids), len(resp.VolumeLocation.DeletedVids),
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len(resp.VolumeLocation.NewEcVids), len(resp.VolumeLocation.DeletedEcVids))
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}
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func (mc *MasterClient) WithClient(streamingMode bool, fn func(client master_pb.SeaweedClient) error) error {
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return util.Retry("master grpc", func() error {
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return pb.WithMasterClient(streamingMode, mc.GetMaster(), mc.grpcDialOption, false, func(client master_pb.SeaweedClient) error {
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return fn(client)
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})
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})
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}
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func (mc *MasterClient) resetVidMap() {
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tail := &vidMap{
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vid2Locations: mc.vid2Locations,
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ecVid2Locations: mc.ecVid2Locations,
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DataCenter: mc.DataCenter,
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cache: mc.cache,
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}
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nvm := newVidMap(mc.DataCenter)
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nvm.cache = tail
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mc.vidMap = nvm
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//trim
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for i := 0; i < mc.vidMapCacheSize && tail.cache != nil; i++ {
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if i == mc.vidMapCacheSize-1 {
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tail.cache = nil
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} else {
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tail = tail.cache
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}
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}
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}
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