Rainbond/eventlog/entry/docker_log_server.go
2020-09-06 11:09:48 +08:00

201 lines
5.5 KiB
Go

// 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 entry
import (
"errors"
"net"
"time"
"github.com/goodrain/rainbond/eventlog/conf"
"github.com/goodrain/rainbond/eventlog/store"
"github.com/goodrain/rainbond/eventlog/util"
"golang.org/x/net/context"
"fmt"
"sync"
"github.com/sirupsen/logrus"
zmq4 "github.com/pebbe/zmq4"
)
//DockerLogServer 日志接受服务
type DockerLogServer struct {
conf conf.DockerLogServerConf
log *logrus.Entry
cancel func()
context context.Context
server *zmq4.Socket
storemanager store.Manager
messageChan chan []byte
listenErr chan error
serverLock sync.Mutex
stopReceiveMessage bool
bufferServer *util.Server
listen *net.TCPListener
}
//NewDockerLogServer 创建zmq server服务端
func NewDockerLogServer(conf conf.DockerLogServerConf, log *logrus.Entry, storeManager store.Manager) (*DockerLogServer, error) {
ctx, cancel := context.WithCancel(context.Background())
s := &DockerLogServer{
conf: conf,
log: log,
cancel: cancel,
context: ctx,
storemanager: storeManager,
listenErr: make(chan error),
}
s.log.Info("receive docker container log server start.")
if conf.Mode == "zmq" {
server, err := zmq4.NewSocket(zmq4.SUB)
server.SetSubscribe("")
if err != nil {
s.log.Error("create rep zmq socket error.", err.Error())
return nil, err
}
address := fmt.Sprintf("tcp://%s:%d", s.conf.BindIP, s.conf.BindPort)
server.Bind(address)
s.log.Infof("Docker container log server listen %s", address)
s.server = server
} else {
// creates a tcp listener
tcpAddr, err := net.ResolveTCPAddr("tcp4", fmt.Sprintf("%s:%d", s.conf.BindIP, s.conf.BindPort))
if err != nil {
s.log.Error("create stream log server address error.", err.Error())
return nil, err
}
listener, err := net.ListenTCP("tcp", tcpAddr)
if err != nil {
s.log.Error("create stream log server listener error.", err.Error())
return nil, err
}
s.listen = listener
// creates a server
config := &util.Config{
PacketSendChanLimit: 10,
PacketReceiveChanLimit: 5000,
}
s.bufferServer = util.NewServer(config, s, s.context)
s.log.Infof("Docker container log server listen %s", tcpAddr)
}
s.messageChan = s.storemanager.DockerLogMessageChan()
if s.messageChan == nil {
return nil, errors.New("receive log message server can not get store message chan ")
}
return s, nil
}
//Serve 执行
func (s *DockerLogServer) Serve() {
if s.conf.Mode == "zmq" {
s.handleMessage()
} else {
s.bufferServer.Start(s.listen, 3*time.Second)
}
}
// OnConnect is called when the connection was accepted,
// If the return value of false is closed
func (s *DockerLogServer) OnConnect(c *util.Conn) bool {
s.log.Debugf("receive a log client connect.")
return true
}
// OnMessage is called when the connection receives a packet,
// If the return value of false is closed
func (s *DockerLogServer) OnMessage(p util.Packet) bool {
if len(p.Serialize()) > 0 {
select {
case s.messageChan <- p.Serialize():
return true
default:
//TODO: return false and receive exist
return true
}
} else {
logrus.Error("receive a null message")
}
return true
}
// OnClose is called when the connection closed
func (s *DockerLogServer) OnClose(*util.Conn) {
s.log.Debugf("a log client closed.")
}
//Stop 停止
func (s *DockerLogServer) Stop() {
s.cancel()
if s.bufferServer != nil {
s.bufferServer.Stop()
}
s.log.Info("receive event message server stop")
}
func (s *DockerLogServer) handleMessage() {
chQuit := make(chan interface{})
chErr := make(chan error, 2)
channel := make(chan []byte, s.conf.CacheMessageSize)
newServerListen := func(sock *zmq4.Socket, channel chan []byte) {
socketHandler := func(state zmq4.State) error {
msg, err := sock.RecvBytes(0)
if err != nil {
s.log.Error("server receive message error.", err.Error())
return err
}
channel <- msg
return nil
}
quitHandler := func(interface{}) error {
close(channel)
s.log.Infof("Event message receive Server quit.")
return nil
}
reactor := zmq4.NewReactor()
reactor.AddSocket(sock, zmq4.POLLIN, socketHandler)
reactor.AddChannel(chQuit, 1, quitHandler)
err := reactor.Run(100 * time.Millisecond)
chErr <- err
}
go newServerListen(s.server, channel)
func() {
for !s.stopReceiveMessage {
select {
case msg := <-channel:
s.messageChan <- msg
case <-s.context.Done():
s.log.Debug("handle message core begin close.")
close(chQuit)
s.stopReceiveMessage = true
// close(s.messageChan)
}
}
}()
s.log.Info("Handle message core stop.")
}
//ListenError listen error chan
func (s *DockerLogServer) ListenError() chan error {
return s.listenErr
}