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Supervisor 安装使用 #27

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johnnian opened this issue Aug 10, 2017 · 0 comments

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@johnnian
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commented Aug 10, 2017

之前在生产环境部署Web服务,使用 nohup来启动服务,但是nohup在异常崩溃的情况下,无法重启服务,找到 Supervisor , 可以实现后台守护进程的方式运行服务。

一、介绍

Supervisor是比较常用的进程管理工具,支持 Linux/MacOS平台,可以用来控制一组Linux/Unix进程(启动、重启、kill)等,使用Supervisor管理的进程,可以做到以守护进程的方式运行,服务异常关闭后可以自动重启。

Supervisor 有下面几个组件:

  • supervisord: Supervisor的服务端程序,使用前,需要先启动该组件;
  • supervisorctl: Supervisor的客户端程序,用来实际控制子进程(自定义的服务、程序);

Supervisor 通过配置文件,还可以启动Web控制台,通过Web页面来管理子进程;

二、安装

环境:
CentOS : 6/7
Python : 2.X

使用Python的Setuptools 软件包来安装:

[root@4fff02d62bba ~]# yum -y install python-setuptools
[root@4fff02d62bba ~]# easy_install supervisor
[root@4fff02d62bba ~]# supervisord -v
3.3.3

默认安装的版本是最新版(3.3.3)

三、配置 & 启动服务

拷贝默认配置文件

[root@4fff02d62bba ~]# mkdir /etc/supervisor
[root@4fff02d62bba ~]# echo_supervisord_conf > /etc/supervisord.conf
[root@4fff02d62bba ~]# vi /etc/supervisord.conf
;修改下面路径
[unix_http_server]
file=/etc/supervisor/supervisor.sock   ; the path to the socket file

;修改下面路径
[supervisord]
logfile=/etc/supervisor/supervisord.log ; main log file; default $CWD/supervisord.log
pidfile=/etc/supervisor/supervisord.pid ; supervisord pidfile; default supervisord.pid

;修改下面路径
[supervisorctl]
serverurl=unix:///etc/supervisor/supervisor.sock ; use a unix:// URL  for a unix socket

;修改include配置,去除注释
[include]
files = /etc/supervisor/*.conf

[root@4fff02d62bba ~]# supervisord -c /etc/supervisord.conf
[root@4fff02d62bba ~]# ps -ef | grep supervisord
root       202     0  0 03:24 ?        00:00:00 /usr/bin/python /usr/bin/supervisord -c /etc/supervisord.conf

四、配置应用或服务器进程

编写应用启动脚本:启动脚本还有其他的选项配置,点击查看官网文档

[root@4fff02d62bba ~]# vi /etc/supervisor/storm.conf
[program:storm]
directory=/root
command=storm supervisor
autostart=true
autorestart=true

配置文件立即生效:

#(修改的配置文件生效,设置`autostart=true`的程序,会自动启动)
[root@4fff02d62bba ~]# supervisorctl update
Restarted supervisord

启动或关闭应用:

#启动全部应用
[root@4fff02d62bba ~]# supervisorctl start all
#关闭全部应用
[root@4fff02d62bba ~]# supervisorctl stop all
#重启全部应用
[root@4fff02d62bba ~]# supervisorctl restart all

启动多个同一进程:

PS: 同一个应用程序,启动多个进程,默认情况下,这些进程都归属于同一个组别,例如下面,test应用启动了2个进程,则这两个进程就归属于 test

[root@ 4fff02d62bba ~]# vi /etc/supervisor/test.conf
[program:test]
directory=/root
command=/root/test
numprocs=2
process_name=%(program_name)s_%(process_num)s
autostart=true
autorestart=true

#查看后台进程:
[root@ 4fff02d62bba ~]# supervisorctl status
test:test_0                        RUNNING   pid 81, uptime 0:00:02
test:test_1                        RUNNING   pid 80, uptime 0:00:02

启动或者关闭一组进程:

[root@ 4fff02d62bba ~]# vi /etc/supervisor/test.conf
[group:foo]
programs=bar,baz
priority=999

#启动组别进程的命令
[root@75d336b8c2cf log]# supervisorctl help start
start <name>		Start a process
start <gname>:*		Start all processes in a group
start <name> <name>	Start multiple processes or groups
start all		Start all processes

[root@75d336b8c2cf log]# supervisorctl start foo:
fazoo:bar: started
foo:b: started

#关闭组别进程的命令
[root@75d336b8c2cf log]# supervisorctl help stop
stop <name>		Stop a process
stop <gname>:*		Stop all processes in a group
stop <name> <name>	Stop multiple processes or groups
stop all		Stop all processes

[root@75d336b8c2cf ~]# supervisorctl stop foo:
fazoo:bar: stopped
foo:b: stopped

以其他用户角色启动进程:

[root@ 4fff02d62bba ~]# vi /etc/supervisor/test.conf
[program:test]
user=test
...

备注:

  • supervisorctl 还有其他命令,点击这里查看官网文档
  • supervisorctl 命令的默认配置文件是:/etc/supervisord.conf
  • 除了上述的配置外,还可以设置输出的日志信息等,具体,可以参考官网。

参考链接

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