Linux 下 supervisor 使用详解

Supervisor is a client/server system that allows its users to control a number of processes on UNIX-like operating systems.-----来自http://supervisord.org/introduction.html

Supervisor包含如下几个组件：

• supervisord

　　　　It is responsible for starting child programs at its own invocation, responding to commands from clients, restarting crashed or exited subprocesseses, logging its subprocess stdout and stderr output, and generating and handling “events” corresponding to points in subprocess lifetimes.

• supervisorctl

　　　　supervisor提供的一个客户端，It provides a shell-like interface to the features provided by supervisord. From supervisorctl, a user can connect to different supervisord processes (one at a time), get status on the subprocesses controlled by, stop and start subprocesses of, and get lists of running processes of a supervisord.

• web server

　　　　提供的一个在浏览器里可以打开的http访问的管理窗口，A (sparse) web user interface with functionality comparable to supervisorctl may be accessed via a browser if you start supervisord against an internet socket. Visit the server URL (e.g. http://localhost:9001/) to view and control process status through the web interface after activating the configuration file’s [inet_http_server] section.

 

Supervisor是用Python开发的一套通用的进程管理程序，能将一个普通的命令行进程变为后台daemon，并监控进程状态，异常退出时能自动重启。它是通过fork/exec的方式把这些被管理的进程当作supervisor的子进程来启动，这样只要在supervisor的配置文件中，把要管理的进程的可执行文件的路径写进去即可。也实现当子进程挂掉的时候，父进程可以准确获取子进程挂掉的信息的，可以选择是否自己启动和报警。supervisor还提供了一个功能，可以为supervisord或者每个子进程，设置一个非root的user，这个user就可以管理它对应的进程。