本文实例讲述了Python实现堡垒机模式下远程命令执行操作。分享给大家供大家参考，具体如下：

一 点睛

堡垒机环境在一定程度上提升了运营安全级别，但同时也提高了日常运营成本，作为管理的中转设备，任何针对业务服务器的管理请求都会经过此节点，比如SSH协议，首先运维人员在办公电脑通过SSH协议登录堡垒机，再通过堡垒机SSH跳转到所有的业务服务器进行维护操作。

我们可以利用paramiko的invoke_shell机制来实现通过堡垒机实现服务器操作，原理是SSHClient.connect到堡垒机后开启一个新的SSH会话 （session），通过新的会话运行“ssh user@IP”去实现远程执行命令的操作。

二 代码

#coding=utf-8#!/usr/bin/env pythonimport paramikoimport os,sys,timehostname="192.168.0.120" # 定义业务服务器username="root"password="123456"blip="192.168.0.101" # 定义业务堡垒机bluser="root"blpasswd="123456"port=22passinfo='\'s password: ' # 输入服务器密码的前标志串paramiko.util.log_to_file('syslogin.log')ssh=paramiko.SSHClient() # ssh登录堡垒机ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())ssh.connect(hostname=blip,username=bluser,password=blpasswd)#new sessionchannel=ssh.invoke_shell() # 创建会话，开启命令调用channel.settimeout(10) # 会话命令执行超时时间，单位为秒buff = ''resp = ''channel.send('ssh '+username+'@'+hostname+'\n') # 执行ssh登录业务主机while not buff.endswith(passinfo): # ssh登录的提示信息判断，输出串尾含有"\'s password："时退出while循环 try: resp = channel.recv(9999) except Exception,e: print 'Error info:%s connection time.' % (str(e)) channel.close() ssh.close() sys.exit() buff += resp if not buff.find('yes/no')==-1: # 输出串尾含有"yes/no"时发送"yes"并回车 channel.send('yes\n')print(buff)print("*************************************************************************************")channel.send(password+'\n') # 发送业务主机密码buff=''while not buff.endswith('# '): # 输出串尾为"# "时说明校验通过并退出while循环 resp = channel.recv(9999) if not resp.find(passinfo)==-1: # 输出串尾含有"\'s password： "时说明 密码不正确,要求重新输入 print 'Error info: Authentication failed.' channel.close() # 关闭连接对象后退出 ssh.close() sys.exit() buff += respchannel.send('ifconfig\n') # 认证通过后发送ifconfig命令来查看结果buff=''try: while buff.find('# ')==-1: resp = channel.recv(9999) buff += respexcept Exception, e: print "error info:"+str(e)print buff # 打印输出串channel.close()ssh.close()

三 输出结果

E:\Python\python_auto_maintain\venv\Scripts\python.exe E:/Python/python_auto_maintain/6_3_2.py
Last login: Thu Feb 28 22:00:07 2019 from 192.168.0.106
hello cakin24!
ssh root@192.168.0.120
[root@slave2 ~]# ssh root@192.168.0.120
root@192.168.0.120's password:
*************************************************************************************
ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.120 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::a00:27ff:fe0a:6e8a prefixlen 64 scopeid 0x20<link>
ether 08:00:27:0a:6e:8a txqueuelen 1000 (Ethernet)
RX packets 2046 bytes 179711 (175.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1408 bytes 148744 (145.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 404117 bytes 68752333 (65.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 404117 bytes 68752333 (65.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
qbr07d54630-64: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
ether 42:76:47:57:b2:75 txqueuelen 1000 (Ethernet)
RX packets 11 bytes 572 (572.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
qvb07d54630-64: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1450
inet6 fe80::4076:47ff:fe57:b275 prefixlen 64 scopeid 0x20<link>
ether 42:76:47:57:b2:75 txqueuelen 1000 (Ethernet)
RX packets 12 bytes 816 (816.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8 bytes 648 (648.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
qvo07d54630-64: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1450
inet6 fe80::dcbe:efff:feb7:5d52 prefixlen 64 scopeid 0x20<link>
ether de:be:ef:b7:5d:52 txqueuelen 1000 (Ethernet)
RX packets 8 bytes 648 (648.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12 bytes 816 (816.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost ~]#

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