Supervisor 介绍
Supervisord是用Python实现的一款非常实用的进程管理工具,类似于monit,monit和supervisord的一个比较大的差异是supervisord管理的进程必须由supervisord来启动,monit可以管理已经在运行的程序;supervisord还要求管理的程序是非daemon程序,supervisord会帮你把它转成daemon程序,因此如果用supervisord来管理nginx的话,必须在nginx的配置文件里添加一行设置daemon off让nginx以非daemon方式启动。
官方文档:http://supervisord.org/index.html
安装
supervisor已经被收录在epel的repo中,可以通过yum 直接安装
配置
supervisor的配置文件为:/etc/supervisord.conf 配置文件必须要有一个program配置项,这样supervisord才知道哪个program需要被管理和监控。
[root@localhost ~]# cat /etc/supervisord.conf [supervisord] http_port=/var/tmp/supervisor.sock ; (default is to run a UNIX domain socket server) ;http_port=127.0.0.1:9001 ; (alternately, ip_address:port specifies AF_INET) ;sockchmod=0700 ; AF_UNIX socketmode (AF_INET ignore, default 0700) ;sockchown=nobody.nogroup ; AF_UNIX socket uid.gid owner (AF_INET ignores) ;umask=022 ; (process file creation umask;default 022) logfile=/var/log/supervisor/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 ; (logging level;default info; others: debug,warn) pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid) nodaemon=false ; (start in foreground if true;default false) minfds=1024 ; (min. avail startup file descriptors;default 1024) minprocs=200 ; (min. avail process descriptors;default 200) ;nocleanup=true ; (don't clean up tempfiles at start;default false) ;http_username=user ; (default is no username (open system)) ;http_password=123 ; (default is no password (open system)) ;childlogdir=/tmp ; ('AUTO' child log dir, default $TEMP) ;user=chrism ; (default is current user, required if root) ;directory=/tmp ; (default is not to cd during start) ;environment=KEY=value ; (key value pairs to add to environment) [supervisorctl] serverurl=unix:///var/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") ; 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) ;priority=999 ; the relative start priority (default 999) ;autostart=true ; start at supervisord start (default: true) ;autorestart=true ; retstart at unexpected quit (default: true) ;startsecs=10 ; number of secs prog must stay running (def. 10) ;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 before SIGKILL (default 10) ;user=chrism ; setuid to this UNIX account to run the program ;log_stdout=true ; if true, log program stdout (default true) ;log_stderr=true ; if true, log program stderr (def false) ;logfile=/var/log/cat.log ; child log path, use NONE for none; default AUTO ;logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB) ;logfile_backups=10 ; # of logfile backups (default 10)
启动/停止 supervisorctl -c /etc/supervisord.conf start/stop XXX(XXX为配置文件中,program处定义的名字)