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server.go
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server.go
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// Copyright 2022 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package servermaster
import (
"context"
"database/sql"
"encoding/json"
"net"
"net/http"
"net/http/httputil"
"net/url"
"sort"
"strings"
"sync"
"time"
grpcprometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"github.com/pingcap/log"
pb "github.com/pingcap/tiflow/engine/enginepb"
"github.com/pingcap/tiflow/engine/framework/metadata"
frameModel "github.com/pingcap/tiflow/engine/framework/model"
"github.com/pingcap/tiflow/engine/model"
pkgClient "github.com/pingcap/tiflow/engine/pkg/client"
dcontext "github.com/pingcap/tiflow/engine/pkg/context"
"github.com/pingcap/tiflow/engine/pkg/deps"
"github.com/pingcap/tiflow/engine/pkg/externalresource/broker"
externRescManager "github.com/pingcap/tiflow/engine/pkg/externalresource/manager"
"github.com/pingcap/tiflow/engine/pkg/meta"
metaModel "github.com/pingcap/tiflow/engine/pkg/meta/model"
"github.com/pingcap/tiflow/engine/pkg/openapi"
pkgOrm "github.com/pingcap/tiflow/engine/pkg/orm"
"github.com/pingcap/tiflow/engine/pkg/p2p"
"github.com/pingcap/tiflow/engine/pkg/rpcutil"
"github.com/pingcap/tiflow/engine/pkg/tenant"
"github.com/pingcap/tiflow/engine/servermaster/scheduler"
schedModel "github.com/pingcap/tiflow/engine/servermaster/scheduler/model"
"github.com/pingcap/tiflow/engine/servermaster/serverutil"
"github.com/pingcap/tiflow/pkg/election"
"github.com/pingcap/tiflow/pkg/errors"
"github.com/pingcap/tiflow/pkg/label"
"github.com/pingcap/tiflow/pkg/security"
"github.com/pingcap/tiflow/pkg/tcpserver"
p2pProtocol "github.com/pingcap/tiflow/proto/p2p"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
"golang.org/x/sync/errgroup"
"golang.org/x/time/rate"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/status"
"google.golang.org/grpc/test/bufconn"
"google.golang.org/protobuf/encoding/protojson"
"google.golang.org/protobuf/types/known/emptypb"
)
// TODO: make it configurable in the future.
const (
leaderElectionTable = "leader_election"
resignLeaderDuration = 10 * time.Second
grpcConnBufSize = 32 * 1024
)
// use a slice instead of map because in small data size, slice search is faster
// than map search.
var masterRPCLimiterAllowList = []string{
"CreateJob",
"CancelJob",
"ScheduleTask",
"CreateResource",
"RemoveResource",
}
// Server handles PRC requests for df master.
type Server struct {
id string // Server id, randomly generated when server is created.
cfg *Config
metrics *serverMasterMetric
elector election.Elector
leaderServiceFn func(context.Context) error
// sched scheduler
executorManager ExecutorManager
jobManager JobManager
resourceManagerService *externRescManager.Service
scheduler *scheduler.Scheduler
// file resource GC
gcRunner externRescManager.GCRunner
gcCoordinator externRescManager.GCCoordinator
msgService *p2p.MessageRPCService
p2pMsgRouter p2p.MessageRouter
rpcLogRL *rate.Limiter
metaStoreManager MetaStoreManager
leaderDegrader *featureDegrader
forwardChecker *forwardChecker
// framework metastore client
frameMetaClient pkgOrm.Client
frameworkClientConn metaModel.ClientConn
businessClientConn metaModel.ClientConn
}
type serverMasterMetric struct {
metricJobNum map[pb.Job_State]prometheus.Gauge
metricExecutorNum map[model.ExecutorStatus]prometheus.Gauge
}
func newServerMasterMetric() *serverMasterMetric {
// Following are leader only metrics
metricJobNum := make(map[pb.Job_State]prometheus.Gauge)
for state, statusName := range pb.Job_State_name {
metric := serverJobNumGauge.WithLabelValues(statusName)
metricJobNum[pb.Job_State(state)] = metric
}
metricExecutorNum := make(map[model.ExecutorStatus]prometheus.Gauge)
for state, name := range model.ExecutorStatusNameMapping {
metric := serverExecutorNumGauge.WithLabelValues(name)
metricExecutorNum[state] = metric
}
return &serverMasterMetric{
metricJobNum: metricJobNum,
metricExecutorNum: metricExecutorNum,
}
}
// NewServer creates a new master-server.
func NewServer(cfg *Config) (*Server, error) {
log.Info("creating server master", zap.Stringer("config", cfg))
id := generateNodeID(cfg.Name)
msgService := p2p.NewMessageRPCServiceWithRPCServer(id, nil, nil)
p2pMsgRouter := p2p.NewMessageRouter(id, cfg.AdvertiseAddr)
server := &Server{
id: id,
cfg: cfg,
leaderDegrader: newFeatureDegrader(),
msgService: msgService,
p2pMsgRouter: p2pMsgRouter,
rpcLogRL: rate.NewLimiter(rate.Every(time.Second*5), 3 /*burst*/),
metrics: newServerMasterMetric(),
metaStoreManager: NewMetaStoreManager(),
}
server.leaderServiceFn = server.runLeaderService
return server, nil
}
// Heartbeat implements pb interface.
func (s *Server) Heartbeat(ctx context.Context, req *pb.HeartbeatRequest) (*pb.HeartbeatResponse, error) {
return s.executorManager.HandleHeartbeat(req)
}
// CreateJob delegates request to leader's JobManager.CreateJob.
func (s *Server) CreateJob(ctx context.Context, req *pb.CreateJobRequest) (*pb.Job, error) {
return s.jobManager.CreateJob(ctx, req)
}
// GetJob delegates request to leader's JobManager.GetJob.
func (s *Server) GetJob(ctx context.Context, req *pb.GetJobRequest) (*pb.Job, error) {
return s.jobManager.GetJob(ctx, req)
}
// ListJobs delegates request to leader's JobManager.ListJobs.
func (s *Server) ListJobs(ctx context.Context, req *pb.ListJobsRequest) (*pb.ListJobsResponse, error) {
return s.jobManager.ListJobs(ctx, req)
}
// CancelJob delegates request to leader's JobManager.CancelJob.
func (s *Server) CancelJob(ctx context.Context, req *pb.CancelJobRequest) (*pb.Job, error) {
return s.jobManager.CancelJob(ctx, req)
}
// DeleteJob delegates request to leader's JobManager.DeleteJob.
func (s *Server) DeleteJob(ctx context.Context, req *pb.DeleteJobRequest) (*emptypb.Empty, error) {
return s.jobManager.DeleteJob(ctx, req)
}
// RegisterExecutor implements grpc interface, and passes request onto executor manager.
func (s *Server) RegisterExecutor(ctx context.Context, req *pb.RegisterExecutorRequest) (*pb.Executor, error) {
executorMeta, err := s.executorManager.AllocateNewExec(ctx, req)
if err != nil {
return nil, err
}
return &pb.Executor{
Id: string(executorMeta.ID),
Name: executorMeta.Name,
Address: executorMeta.Address,
Labels: label.Set(executorMeta.Labels).ToMap(),
}, nil
}
// ListExecutors implements DiscoveryServer.ListExecutors.
func (s *Server) ListExecutors(ctx context.Context, req *pb.ListExecutorsRequest) (*pb.ListExecutorsResponse, error) {
resp := &pb.ListExecutorsResponse{}
executors := s.executorManager.ListExecutors()
for _, executor := range executors {
resp.Executors = append(resp.Executors, &pb.Executor{
Id: string(executor.ID),
Name: executor.Name,
Address: executor.Address,
Labels: executor.Labels.ToMap(),
})
}
sort.Slice(resp.Executors, func(i, j int) bool {
return resp.Executors[i].Id < resp.Executors[j].Id
})
return resp, nil
}
// ListMasters implements DiscoveryServer.ListMasters.
func (s *Server) ListMasters(ctx context.Context, req *pb.ListMastersRequest) (*pb.ListMastersResponse, error) {
resp := &pb.ListMastersResponse{}
leaderAddr, ok := s.leaderAddr()
for _, m := range s.elector.GetMembers() {
isLeader := ok && m.Address == leaderAddr
resp.Masters = append(resp.Masters, &pb.Master{
Id: m.ID,
Name: m.Name,
Address: m.Address,
IsLeader: isLeader,
})
}
sort.Slice(resp.Masters, func(i, j int) bool {
return resp.Masters[i].Id < resp.Masters[j].Id
})
return resp, nil
}
// ScheduleTask implements grpc interface. It works as follows
// - receives request from job master
// - queries resource manager to allocate resource and maps tasks to executors
// - returns scheduler response to job master
func (s *Server) ScheduleTask(ctx context.Context, req *pb.ScheduleTaskRequest) (*pb.ScheduleTaskResponse, error) {
schedulerReq, err := schedModel.NewSchedulerRequestFromPB(req)
if err != nil {
return nil, err
}
schedulerResp, err := s.scheduler.ScheduleTask(ctx, schedulerReq)
if err != nil {
return nil, err
}
addr, ok := s.executorManager.GetAddr(schedulerResp.ExecutorID)
if !ok {
log.Warn("Executor is gone, RPC call needs retry",
zap.Any("request", req),
zap.String("executor-id", string(schedulerResp.ExecutorID)))
return nil, errors.ErrUnknownExecutor.GenWithStackByArgs(string(schedulerResp.ExecutorID))
}
return &pb.ScheduleTaskResponse{
ExecutorId: string(schedulerResp.ExecutorID),
ExecutorAddr: addr,
}, nil
}
// QueryMetaStore implements gRPC interface
func (s *Server) QueryMetaStore(
ctx context.Context, req *pb.QueryMetaStoreRequest,
) (*pb.QueryMetaStoreResponse, error) {
getStore := func(storeID string) (*pb.QueryMetaStoreResponse, error) {
store := s.metaStoreManager.GetMetaStore(storeID)
if store == nil {
return nil, errors.ErrMetaStoreNotExists.GenWithStackByArgs(storeID)
}
config, err := json.Marshal(store)
if err != nil {
return nil, errors.Trace(err)
}
return &pb.QueryMetaStoreResponse{
Config: config,
}, nil
}
switch req.Tp {
case pb.StoreType_SystemMetaStore:
return getStore(FrameMetaID)
case pb.StoreType_AppMetaStore:
return getStore(DefaultBusinessMetaID)
default:
return nil, status.Errorf(codes.InvalidArgument, "unknown store type %v", req.Tp)
}
}
// QueryStorageConfig implements gRPC interface
func (s *Server) QueryStorageConfig(
ctx context.Context, req *pb.QueryStorageConfigRequest,
) (*pb.QueryStorageConfigResponse, error) {
config, err := json.Marshal(s.cfg.Storage)
if err != nil {
return nil, errors.Trace(err)
}
return &pb.QueryStorageConfigResponse{
Config: config,
}, nil
}
// GetLeader implements DiscoveryServer.GetLeader.
func (s *Server) GetLeader(_ context.Context, _ *pb.GetLeaderRequest) (*pb.GetLeaderResponse, error) {
leaderAddr, ok := s.leaderAddr()
if !ok {
return nil, status.Error(codes.NotFound, "no leader")
}
return &pb.GetLeaderResponse{
AdvertiseAddr: leaderAddr,
}, nil
}
// ResignLeader implements DiscoveryServer.ResignLeader.
func (s *Server) ResignLeader(ctx context.Context, _ *pb.ResignLeaderRequest) (*emptypb.Empty, error) {
if err := s.elector.ResignLeader(ctx, resignLeaderDuration); err != nil {
return nil, err
}
return &emptypb.Empty{}, nil
}
// Run the server master.
func (s *Server) Run(ctx context.Context) error {
err := s.registerMetaStore(ctx)
if err != nil {
return err
}
// Elector relies on meta store, so it should be initialized after meta store.
if err := s.initElector(); err != nil {
return errors.Trace(err)
}
// resourceManagerService relies on meta store
s.initResourceManagerService()
if err := broker.PreCheckConfig(&s.cfg.Storage); err != nil {
return err
}
defer func() {
if s.forwardChecker != nil {
if err := s.forwardChecker.Close(); err != nil {
log.Warn("failed to close forward checker", zap.Error(err))
}
}
}()
wg, ctx := errgroup.WithContext(ctx)
wg.Go(func() error {
return s.serve(ctx)
})
wg.Go(func() error {
return s.msgService.GetMessageServer().Run(ctx, nil)
})
wg.Go(func() error {
return s.elector.RunElection(ctx)
})
return wg.Wait()
}
func (s *Server) registerMetaStore(ctx context.Context) error {
// register metastore for framework
cfg := s.cfg
if err := s.metaStoreManager.Register(cfg.FrameworkMeta.StoreID, cfg.FrameworkMeta); err != nil {
return err
}
if cfg.FrameworkMeta.StoreType == metaModel.StoreTypeMySQL {
// Normally, a schema will be created in advance, and we may have no privilege
// to create schema for framework meta. Just for easy test here. Ignore any error.
ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
defer cancel()
if err := meta.CreateSchemaIfNotExists(ctx, *(s.cfg.FrameworkMeta)); err != nil {
log.Error("create schema for framework metastore fail",
zap.String("schema", s.cfg.FrameworkMeta.Schema),
zap.Error(err))
return err
}
}
var err error
s.frameworkClientConn, err = meta.NewClientConn(cfg.FrameworkMeta)
if err != nil {
log.Error("connect to framework metastore fail", zap.Any("config", cfg.FrameworkMeta), zap.Error(err))
return err
}
// some components depend on this framework meta client
s.frameMetaClient, err = pkgOrm.NewClient(s.frameworkClientConn)
if err != nil {
log.Error("create framework meta client fail", zap.Error(err))
return err
}
log.Info("register framework metastore successfully", zap.Any("config", cfg.FrameworkMeta))
// register metastore for business
err = s.metaStoreManager.Register(cfg.BusinessMeta.StoreID, cfg.BusinessMeta)
if err != nil {
return err
}
if cfg.BusinessMeta.StoreType == metaModel.StoreTypeMySQL {
// Normally, a schema will be created in advance, and we may have no privilege
// to create schema for business meta. Just for easy test here. Ignore any error.
ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
defer cancel()
if err := meta.CreateSchemaIfNotExists(ctx, *(s.cfg.BusinessMeta)); err != nil {
log.Error("create schema for business metastore fail",
zap.String("schema", s.cfg.BusinessMeta.Schema),
zap.Error(err))
return err
}
}
s.businessClientConn, err = meta.NewClientConn(cfg.BusinessMeta)
if err != nil {
log.Error("connect to business metastore fail", zap.Any("config", cfg.BusinessMeta), zap.Error(err))
return err
}
log.Info("register business metastore successfully", zap.Any("config", cfg.BusinessMeta))
return nil
}
func (s *Server) initResourceManagerService() {
s.resourceManagerService = externRescManager.NewService(s.frameMetaClient)
}
func (s *Server) initElector() error {
conn, err := s.frameworkClientConn.GetConn()
if err != nil {
return errors.Trace(err)
}
db, ok := conn.(*sql.DB)
if !ok {
return errors.Errorf("failed to convert conn to *sql.DB, got %T", conn)
}
sqlStorage, err := election.NewSQLStorage(db, leaderElectionTable)
if err != nil {
return err
}
elector, err := election.NewElector(election.Config{
ID: s.id,
Name: s.cfg.Name,
Address: s.cfg.AdvertiseAddr,
Storage: sqlStorage,
LeaderCallback: s.leaderServiceFn,
})
if err != nil {
return err
}
s.elector = elector
s.forwardChecker = newForwardChecker(elector)
return err
}
func (s *Server) serve(ctx context.Context) error {
var (
cleaupFuncs []func()
cleanupOnce sync.Once
)
cleanup := func() {
cleanupOnce.Do(func() {
for _, f := range cleaupFuncs {
f()
}
})
}
defer cleanup()
errGroup, ctx := errgroup.WithContext(ctx)
// TODO: Support TLS.
tcpServer, err := tcpserver.NewTCPServer(s.cfg.Addr, &security.Credential{})
if err != nil {
return err
}
cleaupFuncs = append(cleaupFuncs, func() {
if err := tcpServer.Close(); err != nil {
log.Warn("failed to close tcp server", zap.Error(err))
}
})
errGroup.Go(func() error {
return tcpServer.Run(ctx)
})
grpcServer := s.createGRPCServer()
cleaupFuncs = append(cleaupFuncs, grpcServer.Stop)
errGroup.Go(func() error {
return grpcServer.Serve(tcpServer.GrpcListener())
})
// gRPC-Gateway doesn't call gRPC interceptors when it directly forwards requests to the service handler.
// See https://github.com/grpc-ecosystem/grpc-gateway/issues/1043.
//
// To make the gRPC interceptors work, we have to create a client connection to the gRPC server and register it to
// the gRPC-Gateway ServerMux. bufconn is used to create an in-process gRPC server, so the client connection can
// bypass the network stack. See https://github.com/grpc/grpc-go/issues/906 for more details.
ln := bufconn.Listen(grpcConnBufSize)
cleaupFuncs = append(cleaupFuncs, func() {
if err := ln.Close(); err != nil {
log.Warn("failed to close bufconn", zap.Error(err))
}
})
inProcessGRPCServer := s.createGRPCServer()
cleaupFuncs = append(cleaupFuncs, inProcessGRPCServer.Stop)
errGroup.Go(func() error {
return inProcessGRPCServer.Serve(ln)
})
dial := func(ctx context.Context, target string) (net.Conn, error) {
return ln.DialContext(ctx)
}
conn, err := grpc.DialContext(
ctx,
"bufnet",
grpc.WithContextDialer(dial),
grpc.WithTransportCredentials(insecure.NewCredentials()),
)
if err != nil {
return errors.Trace(err)
}
cleaupFuncs = append(cleaupFuncs, func() {
if err := conn.Close(); err != nil {
log.Warn("failed to close grpc connection", zap.Error(err))
}
})
httpServer, err := s.createHTTPServer(conn)
if err != nil {
return err
}
cleaupFuncs = append(cleaupFuncs, func() {
if err := httpServer.Close(); err != nil {
log.Warn("failed to close http server", zap.Error(err))
}
})
errGroup.Go(func() error {
return httpServer.Serve(tcpServer.HTTP1Listener())
})
// Some background goroutines may still be running after context is canceled.
// We need to explicitly stop or close them and wait for them to exit.
errGroup.Go(func() error {
<-ctx.Done()
cleanup()
return errors.Trace(ctx.Err())
})
return errGroup.Wait()
}
func (s *Server) createGRPCServer() *grpc.Server {
logLimiter := rate.NewLimiter(rate.Every(time.Second*5), 3 /*burst*/)
grpcServer := grpc.NewServer(
grpc.StreamInterceptor(grpcprometheus.StreamServerInterceptor),
grpc.ChainUnaryInterceptor(
grpcprometheus.UnaryServerInterceptor,
rpcutil.ForwardToLeader[multiClient](s.forwardChecker),
rpcutil.CheckAvailable(s.leaderDegrader),
rpcutil.Logger(masterRPCLimiterAllowList, logLimiter),
rpcutil.NormalizeError(),
),
)
pb.RegisterDiscoveryServer(grpcServer, s)
pb.RegisterTaskSchedulerServer(grpcServer, s)
pb.RegisterJobManagerServer(grpcServer, s)
pb.RegisterResourceManagerServer(grpcServer, s.resourceManagerService)
p2pProtocol.RegisterCDCPeerToPeerServer(grpcServer, s.msgService.GetMessageServer())
return grpcServer
}
func (s *Server) createHTTPServer(conn *grpc.ClientConn) (*http.Server, error) {
grpcMux := runtime.NewServeMux(
runtime.WithMarshalerOption(runtime.MIMEWildcard, &runtime.JSONPb{
MarshalOptions: protojson.MarshalOptions{UseProtoNames: true, EmitUnpopulated: true},
UnmarshalOptions: protojson.UnmarshalOptions{},
}),
runtime.WithErrorHandler(func(ctx context.Context, mux *runtime.ServeMux,
_ runtime.Marshaler, writer http.ResponseWriter, _ *http.Request, err error,
) {
// Since request may be forwarded to other servers through grpc, we should try
// to extract the error from gRPC error first, and then convert it to HTTP error.
openapi.WriteHTTPError(writer, rpcutil.FromGRPCError(err))
}),
)
if err := pb.RegisterJobManagerHandler(context.Background(), grpcMux, conn); err != nil {
return nil, errors.Trace(err)
}
if err := pb.RegisterDiscoveryHandler(context.Background(), grpcMux, conn); err != nil {
return nil, errors.Trace(err)
}
router := http.NewServeMux()
registerRoutes(router, grpcMux, s.forwardJobAPI)
return &http.Server{
Handler: router,
ReadHeaderTimeout: time.Minute,
}, nil
}
func (s *Server) forwardJobAPI(w http.ResponseWriter, r *http.Request) {
if err := s.handleForwardJobAPI(w, r); err != nil {
openapi.WriteHTTPError(w, err)
}
}
func (s *Server) handleForwardJobAPI(w http.ResponseWriter, r *http.Request) error {
apiPath := strings.TrimPrefix(r.URL.Path, openapi.JobAPIPrefix)
fields := strings.SplitN(apiPath, "/", 2)
if len(fields) != 2 {
return errors.New("invalid job api path")
}
jobID := fields[0]
var targetAddr string
if s.elector.IsLeader() {
forwardAddr, err := s.jobManager.GetJobMasterForwardAddress(r.Context(), jobID)
if err != nil {
return err
}
targetAddr = forwardAddr
} else if leaderAddr, ok := s.leaderAddr(); ok {
targetAddr = leaderAddr
} else {
return errors.New("no leader found")
}
// TODO: Support TLS.
u, err := url.Parse("http://" + targetAddr)
if err != nil {
return errors.Errorf("invalid target address %s", targetAddr)
}
proxy := httputil.NewSingleHostReverseProxy(u)
proxy.ServeHTTP(w, r)
return nil
}
// name is a shortcut to etcd name
func (s *Server) name() string {
return s.id
}
func (s *Server) initializedBackendMeta(ctx context.Context) error {
bctx, cancel := context.WithTimeout(ctx, 3*time.Second)
defer cancel()
if err := pkgOrm.InitAllFrameworkModels(bctx, s.frameworkClientConn); err != nil {
log.Error("framework metastore initializes all backend tables fail", zap.Error(err))
return err
}
// Since we have the sql-type business metastore,
// we need to initialize the logic_epoches table for all jobs
if s.cfg.BusinessMeta.StoreType == metaModel.StoreTypeMySQL {
if err := pkgOrm.InitEpochModel(ctx, s.businessClientConn); err != nil {
log.Error("business metastore initializes the logic epoch table fail", zap.Error(err))
return err
}
}
return nil
}
func (s *Server) runLeaderService(ctx context.Context) (err error) {
start := time.Now()
// leader master need Initialize all backend tables first
err = s.initializedBackendMeta(ctx)
if err != nil {
return
}
// TODO support TLS.
executorClients := pkgClient.NewExecutorGroup(&security.Credential{}, log.L())
masterClient, err := pkgClient.NewServerMasterClientWithFailOver(
pkgClient.MasterServerList{
s.cfg.Addr: true,
},
nil, // TODO support TLS
)
if err != nil {
return
}
dctx := dcontext.NewContext(ctx)
dctx.Environ.Addr = s.cfg.AdvertiseAddr
dctx.Environ.NodeID = s.name()
dctx.ProjectInfo = tenant.FrameProjectInfo
masterMeta := &frameModel.MasterMeta{
ProjectID: tenant.FrameProjectInfo.UniqueID(),
ID: metadata.JobManagerUUID,
Type: frameModel.JobManager,
// TODO: add other infos
}
masterMetaBytes, err := masterMeta.Marshal()
if err != nil {
return
}
dctx.Environ.MasterMetaBytes = masterMetaBytes
dp := deps.NewDeps()
if err := dp.Provide(func() pkgOrm.Client {
return s.frameMetaClient
}); err != nil {
return err
}
if err := dp.Provide(func() metaModel.ClientConn {
return s.businessClientConn
}); err != nil {
return err
}
if err := dp.Provide(func() pkgClient.ExecutorGroup {
return executorClients
}); err != nil {
return err
}
if err := dp.Provide(func() pkgClient.ServerMasterClient {
return masterClient
}); err != nil {
return err
}
if err := dp.Provide(func() p2p.MessageSender {
return p2p.NewMessageSender(s.p2pMsgRouter)
}); err != nil {
return err
}
if err := dp.Provide(func() p2p.MessageHandlerManager {
return s.msgService.MakeHandlerManager()
}); err != nil {
return err
}
defer func() {
s.leaderDegrader.reset()
}()
// The following member variables are used in leader only and released after
// the leader is resigned, so initialize these variables in this function,
// instead of initializing them in the NewServer or Server.Run
// executorMetaClient needs to be initialized after frameMetaClient is initialized.
s.executorManager = NewExecutorManagerImpl(s.frameMetaClient, s.cfg.KeepAliveTTL, s.cfg.KeepAliveInterval)
// ResourceManagerService should be initialized after registerMetaStore.
s.scheduler = scheduler.NewScheduler(
s.executorManager,
s.resourceManagerService)
// TODO refactor this method to make it more readable and maintainable.
errg, errgCtx := errgroup.WithContext(ctx)
errg.Go(func() error {
return s.executorManager.Run(errgCtx)
})
errg.Go(func() error {
updater := executorInfoUpdater{
msgRouter: s.p2pMsgRouter,
executorGroup: executorClients,
}
return serverutil.WatchExecutors(errgCtx, s.executorManager, updater)
})
s.leaderDegrader.updateExecutorManager(true)
dctx = dctx.WithDeps(dp)
s.jobManager, err = NewJobManagerImpl(dctx, metadata.JobManagerUUID, s.cfg.JobBackoff)
if err != nil {
return
}
defer func() {
err := s.jobManager.Close(ctx)
if err != nil {
log.Warn("job manager close with error", zap.Error(err))
}
log.Info("job manager exited")
}()
s.gcRunner = externRescManager.NewGCRunner(s.frameMetaClient, executorClients, &s.cfg.Storage)
s.gcCoordinator = externRescManager.NewGCCoordinator(s.executorManager, s.jobManager, s.frameMetaClient, s.gcRunner)
errg.Go(func() error {
return s.gcRunner.Run(errgCtx)
})
errg.Go(func() error {
return s.gcCoordinator.Run(errgCtx)
})
errg.Go(func() error {
metricTicker := time.NewTicker(defaultMetricInterval)
defer metricTicker.Stop()
leaderTicker := time.NewTicker(time.Millisecond * 200)
defer leaderTicker.Stop()
for {
select {
case <-errgCtx.Done():
// errgCtx is a leaderCtx actually
return errors.Trace(errgCtx.Err())
case <-leaderTicker.C:
if err := s.jobManager.Poll(errgCtx); err != nil {
log.Warn("Polling JobManager failed", zap.Error(err))
return err
}
case <-leaderTicker.C:
s.collectLeaderMetric()
}
}
})
s.leaderDegrader.updateMasterWorkerManager(true)
log.Info("leader is initialized", zap.Duration("took", time.Since(start)))
return errg.Wait()
}
type executorInfoUpdater struct {
msgRouter p2p.MessageRouter
executorGroup *pkgClient.DefaultExecutorGroup
}
func (e executorInfoUpdater) UpdateExecutorList(executors map[model.ExecutorID]string) error {
for id, addr := range executors {
e.msgRouter.AddPeer(string(id), addr)
}
return e.executorGroup.UpdateExecutorList(executors)
}
func (e executorInfoUpdater) AddExecutor(executorID model.ExecutorID, addr string) error {
e.msgRouter.AddPeer(string(executorID), addr)
return e.executorGroup.AddExecutor(executorID, addr)
}
func (e executorInfoUpdater) RemoveExecutor(executorID model.ExecutorID) error {
e.msgRouter.RemovePeer(string(executorID))
return e.executorGroup.RemoveExecutor(executorID)
}
func (s *Server) collectLeaderMetric() {
for statusName := range pb.Job_State_name {
pbStatus := pb.Job_State(statusName)
s.metrics.metricJobNum[pbStatus].Set(float64(s.jobManager.JobCount(pbStatus)))
}
for statusName := range model.ExecutorStatusNameMapping {
s.metrics.metricExecutorNum[statusName].Set(float64(s.executorManager.ExecutorCount(statusName)))
}
}
func (s *Server) leaderAddr() (string, bool) {
leader, ok := s.elector.GetLeader()
if ok {
return leader.Address, true
}
return "", false
}