发布于 2014-11-26 01:33:52 | 883 次阅读 | 评论: 0 | 来源: 网友投递
Supervisor Python进程管理工具
Supervisor 是一个客户端/服务器系统,允许用户监控和控制类 Unix 操作系统上的进程数。
本文为大家讲解的是Supervisor的安装与使用入门，Supervisor 是一个客户端/服务器系统,允许用户监控和控制类 Unix 操作系统上的进程数。感兴趣的同学参考下。
满足的需求是：我现在有一个进程需要每时每刻不断的跑，但是这个进程又有可能由于各种原因有可能中断。当进程中断的时候我希望能自动重新启动它，此时，我就需要使用到了Supervisor.
先弄懂两个命令:
supervisord : supervisor的服务器端部分，启动supervisor就是运行这个命令
supervisorctl：启动supervisor的命令行窗口。
需求：./open_search 这个进程是运行go的一个服务。我们要求这个服务能在意外停止后自动重启。
安装（Centos）：
yum install python-setuptools
easy_install supervisor
测试是否安装成功：
echo_supervisord_conf
会显示以下内容，其实是一个配置模版:
; Sample supervisor config file.
;
; For more information on the config file, please see:
; http://supervisord.org/configuration.html
;
; Note: shell expansion ("~" or "$HOME") is not supported. Environment
; variables can be expanded using this syntax: "%(ENV_HOME)s".[unix_http_server]
file=/tmp/supervisor.sock ; (the path to the socket file)
;chmod=0700 ; socket file mode (default 0700)
;chown=nobody:nogroup ; socket file uid:gid owner
;username=user ; (default is no username (open server))
;password=123 ; (default is no password (open server));[inet_http_server] ; inet (TCP) server disabled by default
;port=127.0.0.1:9001 ; (ip_address:port specifier, *:port for all iface)
;username=user ; (default is no username (open server))
;password=123 ; (default is no password (open server))[supervisord]
logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
logfile_backups=10 ; (num of main logfile rotation backups;default 10)
loglevel=info ; (log level;default info; others: debug,warn,trace)
pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
……; 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:///tmp/supervisor.sock ; use a unix:// URL for a unix socket
;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username=chris ; should be same as http_username if set
;password=123 ; should be same as http_password if set
;prompt=mysupervisor ; cmd line prompt (default "supervisor")
;history_file=~/.sc_history ; use readline history if available; The below sample program section shows all possible program subsection values,
; create one or more ‘real’ program: sections to be able to control them under
; supervisor.;[program:theprogramname]
;command=/bin/cat ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1 ; number of processes copies to start (def 1)
;directory=/tmp ; directory to cwd to before exec (def no cwd)
;umask=022 ; umask for process (default None)
;priority=999 ; the relative start priority (default 999)
;autostart=true ; start at supervisord start (default: true)
;autorestart=unexpected ; whether/when to restart (default: unexpected)
;startsecs=1 ; number of secs prog must stay running (def. 1)
;startretries=3 ; max # of serial start failures (default 3)
;exitcodes=0,2 ; ‘expected’ exit codes for process (default 0,2)
;stopsignal=QUIT ; signal used to kill process (default TERM)
;stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
……;[include]
;files = relative/directory/*.ini
创建配置文件：
echo_supervisord_conf > /etc/supervisord.conf
修改配置文件：
在supervisord.conf最后增加(分号后边的表示注释，可以不写)：
[program:open_search]
command=/home/s/www/fukun/gopath/src/open_search/open_search ;需要执行的命令
directory=/home/s/www/fukun/gopath/src/open_search/ ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; whether/when to restart (default: unexpected)
startsecs=3 ; number of secs prog must stay running (def. 1)
redirect_stderr=true ; redirect proc stderr to stdout (default false) 错误输出重定向
stdout_logfile=/tmp/open_search_gorun.log ; stdout log path, NONE for none; default AUTO, log输出
（更多配置说明请参考：http://supervisord.org/configuration.html）
运行命令：
supervisord //启动supervisor
supervisorctl //打开命令行
[root@vm14211 ~]# supervisorctl
redis RUNNING pid 24068, uptime 3:41:55
ctl中： help //查看命令
ctl中： status //查看状态
另外有一个坑需要注意：
如果修改了 /etc/supervisord.conf ,,需要执行 supervisorctl reload 来重新加载配置文件，否则会感觉没有生效