pythonnetwork-programmingsshparamikocisco

Run a command (to backup a configuration) on multiple servers (routers) in Python


Is it possible to have a script iterate through each IP and backup running configuration on a local tftp server

import paramiko
import sys
import time


USER = "root"
PASS = "cisco"
HOST = ["10.10.10.10","11.11.11.11","12.12.12.12"]
i=0
while i <len(HOST)
def fn():
  client1=paramiko.SSHClient()
  #Add missing client key
  client1.set_missing_host_key_policy(paramiko.AutoAddPolicy())
  #connect to switch
  client1.connect(HOST,username=USER,password=PASS)
  print "SSH connection to %s established" %HOST

 show run | redirect tftp://10.10.10.20/HOST.cfg 
print "Configuration has been backed up"for  %HOST
i+1

show run | redirect tftp://10.10.10.20/HOST.cfg --- can I use variable name as a text file name?


Solution

  • for h in HOST:
        client = paramiko.SSHClient()
        #Add missing client key
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        #connect to switch
        client.connect(h, username = USER, password = PASS)
        print("SSH connection to {0} established".format(h))
        command = "show run | redirect tftp://10.10.10.20/{0}.cfg".format(h)
        (stdin, stdout, stderr) = client.exec_command(command)
        for line in stdout.readlines():
            print(line)
        client.close()
        print("Configuration has been backed up for {0}".format(h))
    

    Obligatory warning: Do not use AutoAddPolicy - You are losing a protection against MITM attacks by doing so. For a correct solution, see Paramiko "Unknown Server".