python3 paramiko 巡检网络设备

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巡检网络设备

用paramiko做网络设备巡检，发现大坑，就是show run这种看配置有多页存在的没法显示第二页，没找到paramiko翻页的地方，添加多个空格也不是很好使。

• 避开这个坑，自动登入搞定了后面命令怎么传都是小事了，传参参考第二个脚本吧。

cisco的全页打印显示配置信息的命令：

terminal length 0
show run

华为和H3C的全页打印显示配置信息的命令：

user-interface vty 0 4
screen-length 0
display current-configuration

• 直接在命令里面传入全局模式密码。

#!/usr/bin/python3
# -*- coding:utf-8 -*-

import paramiko
import time

def main(host, username, password, commands):
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(host, username=username, password=password,
                   port=22, allow_agent=False, look_for_keys=False)
    channel = client.invoke_shell()  # 请求交互式Shell会话
    for command in commands:
        channel.send(command + "\n")  # 发送指令
        while not channel.recv_ready():  # 等待数据到达
            time.sleep(1)
        output = channel.recv(40960)  # 从通道接收数据 nbytes（int）–读取的最大字节数
        print(output.decode())
    client.close()

if __name__ == '__main__':
    host = '192.168.208.131'
    username = 'root'
    password = 'root.123'
    commands = ['enable', 'cisco', 'terminal length 0','show run', 'show ip int br', 'exit']  #全页打印terminal length 0
    main(host, username, password, commands)

• 多添加几个空格还是没有解决翻页的问题，最早用pexpect写的，可以避开这个坑，就是灵活性太低。遇到ssh公钥改变的就连不上了，每个厂家都要重写...

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

import pexpect
import sys
import time

def main(host,username,password,enable,commands):
    # host = '192.168.208.131'
    # username = 'root'
    # password = 'root.123'
    # enable = 'cisco'
    # commands = [ show processes memory ]
    commands = str(commands).split(';')
    child = pexpect.spawnu('ssh %s@%s' % (username,host))
    child.logfile = sys.stdout
    login = child.expect(['yes/no', '[P|p]assword:', pexpect.EOF, pexpect.TIMEOUT])
    if login == 0:
        child.sendline('yes')
        child.expect('[P|p]assword:')
        child.sendline('%s' % password)
    elif login == 1:
        child.sendline('%s' % password)
    child.expect('\>')
    child.sendline('enable')
    child.expect('[P|p]assword:')
    child.sendline('%s' % enable)
    for command in commands:
        child.expect('\#')
        child.sendline('%s' % command)
        index = child.expect(['--More--','\#'])
        if index == 0:
            for i in range(5):
                child.send(' ')
                time.sleep(1)
            #child.sendline(' ')
        child.sendline('')
        #time.sleep(2)
    child.expect('\#')
    child.sendline('exit')
    child.close()

if __name__ == '__main__':
    host = sys.argv[1]
    username = sys.argv[2]
    password = sys.argv[3]
    enable = sys.argv[4]
    commands = sys.argv[5]
    main(host,username,password,enable,commands)