Supervisor进程管理

概述&安装

Supervisor是一个用 Python写的进程管理工具,可以很方便的用来启动、重启、关闭进程。除了对单个进程的控制,还可以同时启动、关闭多个进程、自动重启等。
安装

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$ sudo apt-get install supervisor #或
$ sudo pip install supervisor
$ echo_supervisord_conf > /etc/supervisord.conf #输出默认的配置文件

基本命令

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# 启动
$ supervisorctl # -c /etc/supervisord.conf
$ supervisorctl #进入shell管理
$ > status
$ > start process
$ > stop process
$ > restart process
$ > reread #读取有更新的配置文件
$ > update #重启配置文件修改过的程序
$ ps aux|grep supervisord #查看是否运行

默认配置

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; Sample supervisor config file.

[unix_http_server]
file=/var/run/supervisor/supervisor.sock ; UNIXsocket文件,supervisorctl 会使用
;chmod=0700 ; sockef 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] ; HTTP服务器,提供web管理界面
;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=/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 ; (log level;default info; others: debug,warn,trace)
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)
;umask=022 ; (process file creation umask;default 022)
;user=chrism ; (default is current user, required if root)
;identifier=supervisor ; (supervisord identifier, default is 'supervisor')
;directory=/tmp ; (default is not to cd during start)
;nocleanup=true ; (don't clean up tempfiles at start;default false)
;childlogdir=/tmp ; ('AUTO' child log dir, default $TEMP)
;environment=KEY=value ; (key value pairs to add to environment)
;strip_ansi=false ; (strip ansi escape codes in logs; def. false)

; 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/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=wcg ; 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:XXX]
;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=true ; retstart at unexpected quit (default: true)
;startsecs=10 ; 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)
;user=chrism ; setuid to this UNIX account to run the program
;redirect_stderr=true ; redirect proc stderr to stdout (default false)
;stdout_logfile=/a/path ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10 ; # of stdout logfile backups (default 10)
;stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
;stdout_events_enabled=false ; emit events on stdout writes (default false)
;stderr_logfile=/a/path ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10 ; # of stderr logfile backups (default 10)
;stderr_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
;stderr_events_enabled=false ; emit events on stderr writes (default false)
;environment=A=1,B=2 ; process environment additions (def no adds)
;serverurl=AUTO ; override serverurl computation (childutils)

; The below sample group section shows all possible group values,
; create one or more 'real' group: sections to create "heterogeneous"
; process groups.

;[group:thegroupname]
;programs=progname1,progname2 ; each refers to 'x' in [program:x] definitions
;priority=999 ; the relative start priority (default 999)

; 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 = supervisord.d/*.ini

program配置

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[program:todo]
command=/root/projects/Todo/venv/bin/gunicorn -w 4 todo.wsgi -e DJANGO_SETTINGS_MODULE=todo.settings -b 127.0.0.1:8000
directory=/root/projects/Todo
startsecs=15 ;启动 15 秒后没有异常退出,就当作已经正常启动了
startretries=3 ;启动失败自动重试次数,默认是 3
stopwaitsecs=0 ;等待信号杀死的最大时间
stopsignal=QUIT ;杀死进程的信号
autostart=true ;自动重启
autorestart=true ;程序退出,自动重启
stdout_logfile=/data/todo/logs/gunicorn/gunicorn.log ;log文件,要先创建目录
stderr_logfile=/data/todo/logs/gunicorn/gunicorn.err
priority=3 ;优先级,默认999,越小,优先级越高
user = wcg ;以哪个用户启动

开机启动

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$ vim /etc/rc.local
# 在exit 0 前加入一下命令
/usr/local/bin/supervisord
# 保存退出
$ chmod +x /etc/rc.local

参考

http://liyangliang.me/posts/2015/06/using-supervisor/
https://blog.csdn.net/xyang81/article/details/51555473

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