python程序使用1-supervisor管理进程

使用supervisor来管理进程，另外还设有screen也可以以

一、supervisor管理进程

1、安装

# easy_install supervisor

2、常用功能

*nix系统管理员常用supervisord和supervisorctl、

>>> import supervisor

1）、产生supervisord配置文件

可以通过简单的命令echo_supervisord_conf输出supervisord.conf的内容

产生配置文件

# echo_supervisord_conf > /etc/supervisord.conf

2）、写一个简单进程

#vim daemon.py

#!/usr/bin/env python

import time

print "Daemon run for 3 seconds,then dies"

time.sleep(3)

print "Daemon dies"

# chmod u+x /root/PythonDir/daemon.py

3）、配置这个进程

/etc/supervisord.conf 增加

[program:daemon]

command=/root/PythonDir/daemon.py

autorestart=true

4)启动supervisord

# supervisord

启动守护后daemon.py自动会启动,当关闭后又启动

# ps aux | grep python

root 22669 0.0 4.1 13340 10188 ?? Ss 1:42PM 0:00.12 /usr/local/bin/python2.7 /usr/local/bin/supervisord

root 22697 0.0 1.6 6636 3936 ?? S 1:43PM 0:00.11 python /root/PythonDir/daemon.py

5)查看运行状态

supervisor> exit

# supervisorctl

daemon RUNNING pid 22744, uptime 0:00:01

supervisor> ?

default commands (type help <topic>):

=====================================

add clear fg open quit remove restart start stop update

avail exit maintail pid reload reread shutdown status tail version

supervisor> status

daemon RUNNING pid 22902, uptime 0:00:02

supervisor> pid

22669

supervisord的pid

supervisor> tail

Error: too few arguments

查看程序的各种输出

tail [-f] <name> [stdout|stderr] (default stdout)

Ex:

tail -f <name> Continuous tail of named process stdout

Ctrl-C to exit.

tail -100 <name> last 100 *bytes* of process stdout

tail <name> stderr last 1600 *bytes* of process stderr

其他帮助

supervisor> ?clean

*** No help on clean

supervisor> ?clear

clear <name> Clear a process' log files.

clear <name> <name> Clear multiple process' log files

clear all Clear all process' log files

二、使用screen管理进程

分离常驻进程

# screen /usr/local/bin/tracd -b ofreebsd.skylog.cn -e /usr/local/www/apache22/data/trac/ -p 8888

Ctrl+A 分离

Ctrl+D 重新连接

# screen -r

There are screens on:

26665.pts-3.ofreebsd (Attached)

26548.pts-3.ofreebsd (Attached