使用Monit 监听 Unicorn 进程

Monit 可以自动监视和管理服务器程序, 以确保它们不仅始终保持联机状态, 而且文件大小、校验和或权限始终正确。此外, 播还提供了一个基本的 web 界面, 通过它可以设置所有进程。

安装 Monit

安装 monit

sudo apt-get install monit

通过命令 sudo monit 启动 monit

查看下状态 monit status

The Monit daemon 5.3.2 uptime: 1h 25m

System 'myhost.mydomain.tld'
  status                            Running
  monitoring status                 Monitored
  load average                      [0.03] [0.14] [0.20]
  cpu                               3.5%us 5.9%sy 0.0%wa
  memory usage                      26100 kB [10.4%]
  swap usage                        0 kB [0.0%]
  data collected                    Thu, 30 Aug 2012 18:35:00

修改配置文件 /etc/monit/monitrc，打开web界面访问

set httpd port 2812 and
  use address ${IP} # only accept connection from localhost
  allow localhost   # allow localhost to connect to the server and
  allow 0.0.0.0/0.0.0.0
  allow user:password read-only # require user 'user' with password 'password'

配置完成之后重新加载一下 monit reload

添加监控进程

在 /etc/monit/conf-available 目录下添加一个文件例如： www.example.com

内容如下:

check process example_unicorn
  with pidfile /var/www/www.example.com/current/tmp/pids/unicorn.pid
  start program = "/etc/init.d/example_unicorn start" as uid root and gid root
  stop program = "/etc/init.d/example_unicorn stop" as uid root and gid root

如何制作 example_unicorn service 请见 Unicorn auto start after server boot

并且新建一个软连接：

ln -s /etc/monit/conf-available/www.example.com /etc/monit/conf-enabled/www.example.com

检查下语法 monit t, 重新加载下 monit reload 即可。

访问 http://${ip}:2812 界面截图如下：

参考

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