Python实现堡垒机模式下远程命令执行操作示例

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('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 += resp
channel.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 += 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:\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 ~]#

希望本文所述对大家Python程序设计有所帮助。