自动批量备份交换机配置

原来用expect写了一个备份交换机配置的脚本，但经常是出错或者是备份不成功
现在用python重写过，测试了下，三十多台交换机，总共备份时间也就一秒多，也比原来的脚本稳定多了

再另外说明下：
sw.txt文件中就是需要备份的交换机的IP，每行一个IP就行了
另外需要自己建立一个tftp服务器，交换机配置是备份到tftp服务器上，然后再对配置文件打包等动作

#!/usr/bin/env python
#coding:utf-8

import sys
import os
import telnetlib
import time
import threading
import datetime

#Use for loop to telnet into each routers and execute commands
class Bakconf(threading.Thread):
    def __init__(self,host,upwd,epwd):
        threading.Thread.__init__(self)
        self.host=host
        self.upwd=upwd
        self.epwd=epwd

    def run(self):
        try:
            tn = telnetlib.Telnet(self.host,port=23,timeout=5)
        except:
            print "Can't connection %s"%self.host
            return
        tn.set_debuglevel(5)
        tn.write(self.upwd +b"\n")
        tn.write("en\n")
        tn.write(self.epwd + b"\n")
        tn.write("copy startup-config tftp:\n")
        tn.write(tftpser + b"\n")
        tn.write(b"\n")
        time.sleep(1)
        tn.write("exit\n")
        tn.close()

def main():
    #user_exec_mode_password
    upwd1 = "**********"
    upwd2 = "**********"
    #privilege_exec_mode_password
    epwd1 = "**********"
    epwd2 = "**********"
    global tftpser
    tftpser="192.168.103.71"

    for host in open(r'/backup/shell/sw.txt').readlines():
        dsthost = host.strip('\n')
        bakconf=Bakconf(dsthost, upwd1, epwd1)
        bakconf.start()

    hostlist2=["10.1.11.237","10.1.11.238","192.168.103.239"]
    for host in hostlist2:
        bakconf=Bakconf(host, upwd2, epwd2)
        bakconf.start()

    #Backup switch config and tar
    time.sleep(1)
    dtime=datetime.datetime.now().strftime("%Y%m%d%H%M%S")
    os.popen('tar -cjf /backup/cisco/switch-'+dtime+'.tar.bz2 '+ '/tftproot')
    os.popen('rm -fr /tftproot/*')
    os.popen('find /backup/cisco/ -mtime +90  -exec rm {} \;')

if __name__=="__main__":
    main()