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master.go
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master.go
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/*
Copyright © 2021 Jimmy Ou <breezestars@gmail.com>
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 main
import (
"context"
"flag"
"github.com/cmingou/nrsim/internal/logger"
"github.com/pkg/errors"
"golang.org/x/sync/errgroup"
"log"
"os"
"os/signal"
"syscall"
)
var (
infoLog *log.Logger
errLog *log.Logger
debugLog *log.Logger
masterServerPort int
cliServerPort int
)
func init() {
infoLog = logger.InfoLog
errLog = logger.ErrorLog
debugLog = logger.DebugLog
flag.IntVar(&cliServerPort, "cliSrvPort", 50050, "port for CLI gRPC server")
flag.IntVar(&masterServerPort, "masterSrvPort", 50051, "port for master gRPC server")
flag.Parse()
}
func main() {
var (
ctx context.Context
cancel context.CancelFunc
eg errgroup.Group
)
ctx, cancel = context.WithCancel(context.Background())
// Listen ctrl+c to terminate all gRPC server
signalChannel := make(chan os.Signal, 1)
signal.Notify(signalChannel, os.Interrupt, syscall.SIGTERM)
go func() {
<-signalChannel
cancel()
}()
// Start gRPC server and listen for register
eg.Go(
func() error {
if err := StartMasterGrpcServer(ctx, masterServerPort); err != nil {
return errors.Wrapf(err, "Start master gRPC server failed")
}
return nil
},
)
// Start gRPC server to listen CLI
eg.Go(
func() error {
if err := StartCLIGrpcServer(ctx, cliServerPort); err != nil {
return errors.Wrapf(err, "Start CLI gRPC server failed")
}
return nil
},
)
if err := eg.Wait(); err != nil {
errLog.Printf(err.Error())
signalChannel <- syscall.SIGTERM
}
}