python实现跳板机
Posted zhoumjane
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公司有1000多台服务器,线上机器都是禁止root登录的,所以平时是用普通用户登录,然后在su到root,密码都是在excel表中存的,这样登录一台机器,输两次命令,搜两次密码,实在很麻烦,而且密码表都在大家手中不易控制,所以把密码放到数据库中,每次ssh登录自动去数据库中查密码,然后发送密码,实现交互,这样既方便了我们,又控制的密码,脚本的核心是用pexpect来实现交互,用MySQLdb去查询密码,把代码保存为zssh 给个执行权限,建立数据库,把密码表导入到数据库中,就可以使用zssh ip 来登录了,是不是很爽,来试试吧!
pexpect的用法看http://www.ibm.com/developerworks/cn/linux/l-cn-pexpect1/
代码见附件
代码如下:
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#!/usr/local/bin/python # coding: utf-8 ##导入模块 import os import sys import pexpect import MySQLdb import struct import fcntl import termios import signal ##传入的参数 opt = sys.argv ##如果没跟参数,就提示 if len (opt) = = 1 : print ‘‘‘ ---------------------------- ‘Useage: ./zssh.py ServerIP‘ ---------------------------- ‘‘‘ sys.exit( 2 ) ##下面两个函数更改pexpect模拟的窗口大小, ##参见http://guweigang.com/blog/2012/10/25/using-python-ssh-landing-module-performs-pexpect/ def sigwinch_passthrough (sig, data): winsize = getwinsize() global foo foo.setwinsize(winsize[ 0 ],winsize[ 1 ]) def getwinsize(): if ‘TIOCGWINSZ‘ in dir (termios): TIOCGWINSZ = termios.TIOCGWINSZ else : TIOCGWINSZ = 1074295912L # Assume s = struct.pack( ‘HHHH‘ , 0 , 0 , 0 , 0 ) x = fcntl.ioctl(sys.stdout.fileno(), TIOCGWINSZ, s) return struct.unpack( ‘HHHH‘ , x)[ 0 : 2 ] ##传入的ip ip = opt[ 1 ] ##用MySQLdb驱动连接mysql conn = MySQLdb.connect(host = ‘localhost‘ , user = ‘root‘ , passwd = ‘Te62S#^t‘ , db = ‘sa‘ ) cursor = conn.cursor() ##查找该ip的普通用户名,密码,还有root的密码,用来ssh连接 cursor.execute( ‘select muser,mpass,rpass from password where ip=%s‘ , ip) result = cursor.fetchall() ##如果没在数据库中发现该ip信息,提示用户输入,并保存,如果发现就准备连接 if len (result) = = 0 : muser = raw_input ( ‘输入用户名:‘ ) mpass = raw_input ( ‘输入用户密码: ‘ ) rpass = raw_input ( ‘输入root密码: ‘ ) cursor.execute( ‘insert into password values (%s,%s,%s,%s)‘ , (ip, muser, mpass, rpass)) conn.commit() elif len (result) = = 1 : muser = result[ 0 ][ 0 ] mpass = result[ 0 ][ 1 ] rpass = result[ 0 ][ 2 ] ##用pexpect模块的spawn类,连接ssh while True : ##期望得到列表里的东西 index = foo.expect([ ‘continue‘ , ‘assword‘ , pexpect.EOF, pexpect.TIMEOUT],timeout = 10 ) ##如果得到的是continue,也就是第一次连接输入yes/no那,那就发送yes if index = = 0 : foo.sendline( ‘yes‘ ) continue ##如果是提示输入password,那就发送密码 elif index = = 1 : foo.sendline(mpass) ##发送密码后有两种情况,登录成功或密码错误 index2 = foo.expect([ ‘password‘ , ‘]$‘ ]) ##如果得密码正确 if index2 = = 1 : print ‘%s 登录成功‘ % muser break ##如果密码错误,提示输入密码 elif index2 = = 0 : while True : muser = raw_input ( ‘输入用户名:‘ ) mpass = raw_input ( ‘用户密码不对,重新输入: ‘ ) foo.sendline(mpass) index3 = foo.expect([ ‘]$‘ , ‘assword‘ ], timeout = 5 ) ##如果密码对了,就保存到数据库 if index3 = = 0 : cursor.execute( ‘update sys_pass set muser=%s, mpass=%s where ip=%s ‘ , (muser, mpass, ip)) conn.commit() foo.sendline(‘‘) break ##如果不对,再循环一次 else : continue else : print ‘连接超时‘ break ##下面su 到root与上面类似 while True : foo.expect( ‘$‘ ) foo.sendline( ‘su - root‘ ) #index4 = foo.expect([‘口令‘, ‘密码‘, ‘assword‘, pexpect.TIMEOUT, pexpect.EOF],timeout=5) foo.sendline(rpass) index5 = foo.expect([ ‘]#‘ , ‘monitor‘ , pexpect.EOF, pexpect.TIMEOUT], timeout = 5 ) if index5 = = 0 : print ‘root 登录成功‘ foo.sendline(‘‘) break elif index5 = = 1 : while True : rpass = raw_input ( ‘root密码不对,请输入: ‘ ) foo.expect( ‘$‘ ) foo.sendline( ‘su - root‘ ) #index6 = foo.expect([‘口令‘, ‘密码‘, ‘assword‘, pexpect.TIMEOUT, pexpect.EOF],timeout=5) foo.sendline(rpass) index7 = foo.expect([ ‘]#‘ , ‘monitor‘ , pexpect.EOF, pexpect.TIMEOUT], timeout = 5 ) if index7 = = 0 : cursor.execute( ‘update sys_pass set rpass=%s where ip=%s‘ , (rpass, ip)) conn.commit() print ‘root 登录成功‘ break elif index7 = = 1 : continue else : print ‘error‘ else : print ‘error‘ ##这个是利用那两个函数来调节子线程窗口大小 signal.signal(signal.SIGWINCH, sigwinch_passthrough) size = getwinsize() foo.setwinsize(size[ 0 ], size[ 1 ]) ##进入interact交互模式 foo.interact() pass |
数据库建立
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create database sa; create table password (ip varchar (15) primary key not null , muser varchar (15), mpass varchar (30), rpass varchar (30)); |
将密码表的中的ip,普通用户名,密码,root密码插入库中我用的是一个脚本
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#!/usr/local/bin/python import MySQLdb conn = MySQLdb.connect(host = ‘localhost‘ , user = ‘root‘ , passwd = ‘Te62S#^t‘ , db = ‘sa‘ ) cursor = conn.cursor() f = open ( ‘passwd.txt‘ ) num = 0 for i in f: ilist = i.split() if len (ilist) = = 4 : ip = ilist[ 0 ] muser = ilist[ 1 ] mpass = ilist[ 2 ] rpass = ilist[ 3 ] try : cursor.execute( ‘insert into password values (%s,%s,%s,%s)‘ , (ip, muser, mpass, rpass)) num + = 1 except : pass print num conn.commit() cursor.close() conn.commit() |
将密码保存到passwd.txt格式类下面的格式,执行脚本就可以了
IP 普通用户名 密码 root密码
202.106.0.20 monitor asdf123Sfad f(adfasdfasdf
202.106.0.21 zhswred hathell oworld
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