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scheduler.go
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scheduler.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package scheduler
import (
"context"
"fmt"
"net"
"net/http"
"time"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
"google.golang.org/grpc"
logger "d7y.io/dragonfly/v2/internal/dflog"
"d7y.io/dragonfly/v2/pkg/dfpath"
"d7y.io/dragonfly/v2/pkg/gc"
rpcmanager "d7y.io/dragonfly/v2/pkg/rpc/manager"
managerclient "d7y.io/dragonfly/v2/pkg/rpc/manager/client"
"d7y.io/dragonfly/v2/scheduler/config"
"d7y.io/dragonfly/v2/scheduler/job"
"d7y.io/dragonfly/v2/scheduler/metrics"
"d7y.io/dragonfly/v2/scheduler/resource"
"d7y.io/dragonfly/v2/scheduler/rpcserver"
"d7y.io/dragonfly/v2/scheduler/scheduler"
"d7y.io/dragonfly/v2/scheduler/service"
)
const (
gracefulStopTimeout = 10 * time.Second
)
type Server struct {
// Server configuration
config *config.Config
// GRPC server
grpcServer *grpc.Server
// Metrics server
metricsServer *http.Server
// Manager client
managerClient managerclient.Client
// Dynamic config
dynconfig config.DynconfigInterface
// Async job
job job.Job
// GC server
gc gc.GC
}
func New(ctx context.Context, cfg *config.Config, d dfpath.Dfpath) (*Server, error) {
s := &Server{config: cfg}
// Initialize manager client
managerClient, err := managerclient.New(cfg.Manager.Addr)
if err != nil {
return nil, err
}
s.managerClient = managerClient
// Register to manager
if _, err := s.managerClient.UpdateScheduler(&rpcmanager.UpdateSchedulerRequest{
SourceType: rpcmanager.SourceType_SCHEDULER_SOURCE,
HostName: s.config.Server.Host,
Ip: s.config.Server.IP,
Port: int32(s.config.Server.Port),
Idc: s.config.Host.IDC,
Location: s.config.Host.Location,
SchedulerClusterId: uint64(s.config.Manager.SchedulerClusterID),
}); err != nil {
logger.Fatalf("register to manager failed %v", err)
}
// Initialize dynconfig client
dynconfig, err := config.NewDynconfig(s.managerClient, d.CacheDir(), cfg)
if err != nil {
return nil, err
}
s.dynconfig = dynconfig
// Initialize GC
s.gc = gc.New(gc.WithLogger(logger.GCLogger))
// Initialize grpc options
var (
serverOptions []grpc.ServerOption
dialOptions []grpc.DialOption
)
if s.config.Options.Telemetry.Jaeger != "" {
serverOptions = append(
serverOptions,
grpc.ChainUnaryInterceptor(otelgrpc.UnaryServerInterceptor()),
grpc.ChainStreamInterceptor(otelgrpc.StreamServerInterceptor()),
)
dialOptions = append(
dialOptions,
grpc.WithChainUnaryInterceptor(otelgrpc.UnaryClientInterceptor()),
grpc.WithChainStreamInterceptor(otelgrpc.StreamClientInterceptor()),
)
}
// Initialize resource
resource, err := resource.New(cfg, s.gc, dynconfig, dialOptions...)
if err != nil {
return nil, err
}
// Initialize scheduler
scheduler := scheduler.New(cfg.Scheduler, dynconfig, d.PluginDir())
// Initialize scheduler service
service := service.New(cfg, resource, scheduler, dynconfig)
// Initialize grpc service
svr := rpcserver.New(service, serverOptions...)
s.grpcServer = svr
// Initialize job service
if cfg.Job.Enable {
s.job, err = job.New(cfg, resource)
if err != nil {
return nil, err
}
}
// Initialize metrics
if cfg.Metrics.Enable {
s.metricsServer = metrics.New(cfg.Metrics, s.grpcServer)
}
return s, nil
}
func (s *Server) Serve() error {
// Serve dynConfig
go func() {
if err := s.dynconfig.Serve(); err != nil {
logger.Fatalf("dynconfig start failed %v", err)
}
logger.Info("dynconfig start successfully")
}()
// Serve GC
s.gc.Serve()
logger.Info("gc start successfully")
// Serve Job
if s.job != nil {
s.job.Serve()
logger.Info("job start successfully")
}
// Started metrics server
if s.metricsServer != nil {
go func() {
logger.Infof("started metrics server at %s", s.metricsServer.Addr)
if err := s.metricsServer.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
return
}
logger.Fatalf("metrics server closed unexpect: %v", err)
}
}()
}
if s.managerClient != nil {
// scheduler keepalive with manager
go func() {
logger.Info("start keepalive to manager")
s.managerClient.KeepAlive(s.config.Manager.KeepAlive.Interval, &rpcmanager.KeepAliveRequest{
HostName: s.config.Server.Host,
SourceType: rpcmanager.SourceType_SCHEDULER_SOURCE,
ClusterId: uint64(s.config.Manager.SchedulerClusterID),
})
}()
}
// Generate GRPC limit listener
listener, err := net.Listen("tcp", fmt.Sprintf("%s:%d", s.config.Server.IP, s.config.Server.Port))
if err != nil {
logger.Fatalf("net listener failed to start: %v", err)
}
defer listener.Close()
// Started GRPC server
logger.Infof("started grpc server at %s://%s", listener.Addr().Network(), listener.Addr().String())
if err := s.grpcServer.Serve(listener); err != nil {
logger.Errorf("stoped grpc server: %v", err)
return err
}
return nil
}
func (s *Server) Stop() {
// Stop dynconfig server
if err := s.dynconfig.Stop(); err != nil {
logger.Errorf("dynconfig client closed failed %v", err)
}
logger.Info("dynconfig client closed")
// Stop manager client
if s.managerClient != nil {
if err := s.managerClient.Close(); err != nil {
logger.Errorf("manager client failed to stop: %v", err)
}
logger.Info("manager client closed")
}
// Stop GC
s.gc.Stop()
logger.Info("gc closed")
// Stop metrics server
if s.metricsServer != nil {
if err := s.metricsServer.Shutdown(context.Background()); err != nil {
logger.Errorf("metrics server failed to stop: %v", err)
}
logger.Info("metrics server closed under request")
}
// Stop GRPC server
stopped := make(chan struct{})
go func() {
s.grpcServer.GracefulStop()
logger.Info("grpc server closed under request")
close(stopped)
}()
t := time.NewTimer(gracefulStopTimeout)
select {
case <-t.C:
s.grpcServer.Stop()
case <-stopped:
t.Stop()
}
}