【Python运维】最简单的Python运维脚本

背景

最近在Windows 10上使用Linux子系统，发现它有一个非常坑爹的特点：Linux子系统是没有开机关机状态的，每次进入Bash shell就自动载入，退出后Linux子系统的所有进程都会被关闭，如果你撞了Mysql之类的服务要想随时运行的话就要保持Bash shell的随时开启，更坑的是这些服务并不会随之进入Bash shell而自动启动， 我只好写一个Python脚本用于管理这些服务。

相关技术

Python3, argparse module

代码

from os import system
from argparse import ArgumentParser

def start_service(service):
    system("service {} start".format(service))

def stop_service(service):
    system("service {} stop".format(service))

def restart_service(service):
    print(service)
    system("service {} restart".format(service))

def manage_service():
    services = []
    services.append("xinetd")
    services.append("lighttpd")
    return services

def set_args():
    parser = ArgumentParser()
    parser.add_argument("service", help = "the service to be managed.")
    parser.add_argument("-s", "--start", help = "start the service(s).", action = "store_true")
    parser.add_argument("-r", "--restart", help = "restart the service(s).", action = "store_true")
    parser.add_argument("-p", "--stop", help = "stop the service(s).", action = "store_true")
    return parser.parse_args()

def deal(args,services):
    global start_service, restart_service, stop_service
    services = services if not args.service else services if args.service == "all"else [args.service]
    operation = start_service if args.start else restart_service if args.restart else stop_service
    for  service in services:
       operation(service)

if __name__ == "__main__":
    deal(set_args(),manage_service())

运行

开启服务

(env) root@DESKTOP-1DDIIV2:~# python pyops.py all -s
initctl: 无法连接到 Upstart: Failed to connect to socket /com/ubuntu/upstart: 拒绝连接
 * Starting internet superserver xinetd                                                                                                                          [fail]
 * Starting web server lighttpd                                                                                                                                  [ OK ]
(env) root@DESKTOP-1DDIIV2:~#

关闭服务

(env) root@DESKTOP-1DDIIV2:~# python pyops.py xinetd -p
initctl: 无法连接到 Upstart: Failed to connect to socket /com/ubuntu/upstart: 拒绝连接
 * Stopping internet superserver xinetd                                                                                                                          [ OK ]
(env) root@DESKTOP-1DDIIV2:~#

重启服务

(env) root@DESKTOP-1DDIIV2:~# python pyops.py xinetd -r
xinetd
initctl: 无法连接到 Upstart: Failed to connect to socket /com/ubuntu/upstart: 拒绝连接
 * Stopping internet superserver xinetd                                                                                                                          [ OK ]
 * Starting internet superserver xinetd                                                                                                                          [ OK ]
(env) root@DESKTOP-1DDIIV2:~#

感想

Python脚本还是比shell脚本好写很多啊。