在Linux中异常时自动重启或正确处理socket.io服务器

时间:2016-03-25 23:46:37

标签: linux node.js socket.io restart

我的socket.io服务器在后台运行了。然而,有几种情况它已经死亡。我该怎么做才能使socket.io服务器在它终止或终止时自动重启。

这就是我启动节点服务器的方式

> node server &
然而,服务器抛出异常并死亡。

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: Redis connection to pub-redis-us-east1-garantiabata.com:12087 failed - connect ETIMEDOUT 54.179.28.165:12087
    at RedisClient.on_error (/home/org-chatserver/node_modules/redis/index.js:185:24)
    at Socket.<anonymous> (/home/org-chatserver/node_modules/redis/index.js:95:14)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)
    at emitErrorNT (net.js:1253:8)
    at doNTCallback2 (node.js:450:9)
    at process._tickCallback (node.js:364:17)
^C

这是我的环境

Linux version 2.6.32-042stab090.5 (root@kbuild-rh6-x64) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Sat Jun 21 00:15:09 MSK 2014

我相信我的团队正在使用它:

https://github.com/jbavari/ionic-socket.io-redis-chat

3 个答案:

答案 0 :(得分:2)

您可以使用主管 - http://supervisord.org

  

Supervisor是一个客户端/服务器系统,允许其用户在类UNIX操作系统上监视和控制许多进程。

安装完成后,为您的应用创建一个超级用户配置文件。

例如,在/etc/supervisor/conf.d/myserver.conf -

[program:my-server]
    command=node /path/to/server.js
    numprocs=1
    autostart=true  
    autorestart=true
    startretries=99999
    environment=NODE_ENV=production  
    stderr_logfile=/var/log/my-server.err.log  
    stdout_logfile=/var/log/my-server.log  
    user=myuser  

编辑主管主配置文件 - /etc/supervisor/supervisord.conf

[unix_http_server]
file=/var/run/supervisor.sock    ; (the path to the socket file)
chmod=0700                       ; socket file mode (default 0700)

[supervisord]
logfile=/var/log/supervisor/supervisord.log ; (main log file;default    ] $CWD/supervisord.log)
pidfile=/var/run/supervisord.pid            ; (supervisord pidfile;default supervisord.pid)
childlogdir=/var/log/supervisor             ; ('AUTO' child log dir, default $TEMP)

; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
 [rpcinterface:supervisor]
supervisor.rpcinterface_factory =  supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
serverurl=unix:///var/run//supervisor.sock ; use a unix:// URL  for a unix socket

; The [include] section can just contain the "files" setting.  This
; setting can list multiple files (separated by whitespace or
; newlines).  It can also contain wildcards.  The filenames are
; interpreted as relative to this file.  Included files *cannot*
; include files themselves.

[include]
files = /etc/supervisor/conf.d/*.conf

使用方法: /etc/init.d/supervisord {start|stop|restart|force-reload|status|force-stop}

有关更多信息/文档,请阅读http://supervisord.org/

答案 1 :(得分:0)

您可以使用pm2来监控日志,自动重启......等等。例如:

sudo npm install -g pm2
pm2 start app.js --watch

有关watch & restart的更多信息。

答案 2 :(得分:-1)

要使服务器连接回来,您可能需要使用一些程序(如永远)来检查服务器的状态,并在服务器终止时重新启动它。然而,这并没有解决客户的问题。客户端还需要在服务器终止时重新初始化与服务器的连接。让我向您展示如何使客户端连接回服务器的最小示例。

主要思想是您将从客户端套接字侦听“close”事件,并在需要时重新启动连接。让我们使用OOP来更好地说明这一点。

function Connector(host, port)
{
  // Connection parameters
  this.host = host;
  this.port = port;

  this.socket = null;

  // Attempt to establish a connection with the server.
  this._connect();
}

Connector.prototype._connect = function()
{
  this.socket = net.connect(this.port, this.host);

  this.socket.on('connect', this._onConnect);
  this.socket.on('error', this._onError);
  this.socket.on('close', this._onClose);
  this.socket.on('data', this._onData);
}


Connector.prototype._onConnect = function()
{
  console.log('Incoming connection');
}

Connector.prototype._onError = function(err)
{
  console.error('Connection error: ' + err);
}

Connector.prototype._onClose = function(had_error)
{
  console.log('Reconnecting to server.');
  self._scheduleReconnection();
}


Connector.prototype._scheduleReconnection = function()
{
  self.socket.removeAllListeners();
  self.socket = null;

  // Try to connect to the server again after 2 seconds.
  setTimeout(self._connect.bind(self), 2000);
}

Connector.prototype._onData = function(data)
{
  console.log('Incoming data.')
}

使用Connector对象,您现在可以使用以下命令启动连接:

connection = new Connector(127.0.0.1, 8080)

并且您知道此连接将不断尝试与服务器保持连接。