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 python
import paramiko
import os,sys,time
hostname="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=22
passinfo='\'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 session
channel=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('yesn')
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 += resp
channel.send('ifconfign') # 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 += resp
except Exception, e:
print "error info:"+str(e)
print buff # 打印输出串
channel.close()
ssh.close()
三 输出结果
E:\Pythonpython_auto_maintainvenvScriptspython.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 ~]#
希望本文所述对大家Python程序设计有所帮助。
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