/
appruntimesync.go
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/
appruntimesync.go
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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package appruntimesync
import (
"context"
"fmt"
"net"
"sync"
"github.com/goodrain/rainbond/util"
"github.com/Sirupsen/logrus"
client "github.com/coreos/etcd/clientv3"
"github.com/goodrain/rainbond/cmd/worker/option"
"github.com/goodrain/rainbond/appruntimesync/pb"
"github.com/goodrain/rainbond/appruntimesync/server"
discover "github.com/goodrain/rainbond/discover.v2"
"github.com/goodrain/rainbond/util/etcd/etcdlock"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
//AppRuntimeSync app runtime sync modle
// handle app status and event
type AppRuntimeSync struct {
conf option.Config
server *grpc.Server
etcdCli *client.Client
ctx context.Context
cancel context.CancelFunc
srss *server.AppRuntimeSyncServer
keepalive *discover.KeepAlive
master etcdlock.MasterInterface
hostIP string
masterRun bool
once sync.Once
}
//Start start if have master right
//start grpc server
func (a *AppRuntimeSync) Start(errchan chan error) {
if a.hostIP == "" {
ip, err := util.LocalIP()
if err != nil {
logrus.Errorf("get ip failed,details %s", err.Error())
errchan <- err
}
a.hostIP = ip.String()
}
util.Exec(a.ctx, func() error {
a.selectMaster(errchan)
return nil
}, 1)
}
func (a *AppRuntimeSync) selectMaster(errchan chan error) {
master, err := etcdlock.CreateMasterLock(a.conf.EtcdEndPoints, "/rainbond/workermaster", fmt.Sprintf("%s:%d", a.hostIP, 6535), 10)
if err != nil {
errchan <- err
return
}
a.master = master
master.Start()
defer master.Stop()
for {
select {
case event := <-master.EventsChan():
if event.Type == etcdlock.MasterAdded {
if err := a.srss.Start(); err != nil {
errchan <- err
return
}
go a.startAppRuntimeSync()
if err := a.registServer(); err != nil {
errchan <- err
return
}
a.masterRun = true
}
if event.Type == etcdlock.MasterDeleted {
if a.masterRun {
errchan <- fmt.Errorf("master node delete")
}
return
}
if event.Type == etcdlock.MasterError {
if event.Error.Error() == "elect: session expired" {
//TODO:if etcd error. worker restart
}
//if this is master node, exit
if a.masterRun {
errchan <- event.Error
}
return
}
}
}
}
//Stop stop app runtime sync server
func (a *AppRuntimeSync) Stop() error {
a.once.Do(func() {
a.cancel()
a.srss.Stop()
if a.master != nil {
a.master.Stop()
}
if a.keepalive != nil {
a.keepalive.Stop()
}
})
return nil
}
//registServer
//regist sync server to etcd
func (a *AppRuntimeSync) registServer() error {
if a.keepalive == nil {
keepalive, err := discover.CreateKeepAlive(a.conf.EtcdEndPoints, "app_sync_runtime_server", "", a.conf.HostIP, 6535)
if err != nil {
return fmt.Errorf("create app sync server keepalive error,%s", err.Error())
}
a.keepalive = keepalive
}
return a.keepalive.Start()
}
//CreateAppRuntimeSync create app runtime sync model
func CreateAppRuntimeSync(conf option.Config) *AppRuntimeSync {
ctx, cancel := context.WithCancel(context.Background())
ars := &AppRuntimeSync{
conf: conf,
ctx: ctx,
cancel: cancel,
server: grpc.NewServer(),
srss: server.NewAppRuntimeSyncServer(conf),
hostIP: conf.HostIP,
}
pb.RegisterAppRuntimeSyncServer(ars.server, ars.srss)
// Register reflection service on gRPC server.
reflection.Register(ars.server)
return ars
}
//StartAppRuntimeSync start grpc server and regist to etcd
func (a *AppRuntimeSync) startAppRuntimeSync() error {
lis, err := net.Listen("tcp", fmt.Sprintf(":%d", 6535))
if err != nil {
logrus.Errorf("failed to listen: %v", err)
return err
}
return a.server.Serve(lis)
}