Also we have excluded some exeptions like timeout and authentication failure to prevent script stops when its hepens.
We also have function to prompt for Username and Password and verify the password to confirm.
python@python:~$ ls -lh
-* command2.py (Main Script we are working on)
-* devices.json (We use this file to read Device list from there)
-* credential_tools.py (Exported some tools such credential management to do not load a main script)
### command2.py
python@python:~$ cat command2.py
#!/usr/bin/python
import netmiko
import json
#Import our tools to manage credentials
#Import our tools to manage credentials
import credential_tools
#Configure Exceptions for timeout and authentication failure
netmiko_exceptions = (netmiko.ssh_exception.NetMikoTimeoutException,
netmiko.ssh_exception.NetMikoAuthenticationException)
username, password = credential_tools.get_credentials()
#Open the file witch contains device list in json format
with open('devices.json') as dev_file:
with open('devices.json') as dev_file:
devices = json.load(dev_file)
for device in devices:
device["username"] = username
device["password"] = password
try:
print("-"*80)
print("Connecting to Device ", device["ip"])
connection = netmiko.ConnectHandler(**device)
print(connection.send_command("show running-config | in hostname"))
print(connection.send_command("show clock"))
print(connection.send_command("show ip interface brief"))
connection.disconnect()
except netmiko_exceptions as e:
print("Failed to ", device["ip"], e)
### devices.json
python@python:~$ cat devices.json
[
{
"ip": "10.0.10.105",
"device_type": "cisco_ios"
},
{
"ip": "10.0.10.106",
"device_type": "cisco_ios"
},
{
"ip": "10.0.10.107",
"device_type": "cisco_ios"
},
{
"ip": "10.0.10.108",
"device_type": "cisco_ios"
}
]
### credential_tools.py
python@python:~$ cat credential_tools.py
from getpass import getpass
def get_input(prompt=""):
try:
line = raw_input(prompt)
except NameError:
line = input(prompt)
return line
def get_credentials():
"""Prompts for, and returns, a username and password."""
username = get_input("Enter Username: ")
password = None
while not password:
password = getpass()
password_verify = getpass("Retype Your Password: ")
if password != password_verify:
print("Password do not match. Try again! ")
password = None
return username, password
Result :
python@python:~$ ./command2.py
Enter Username: admin
Password: ******
Retype Your Password: ******
--------------------------------------------------------------------------------
('Connecting to Device ', u'10.0.10.105')
hostname XZXNR0801
*14:31:31.939 UTC Sun Mar 31 2019
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet1/0 10.0.10.105 YES manual up up
--------------------------------------------------------------------------------
('Connecting to Device ', u'10.0.10.106')
hostname XZXNR0802
*14:32:07.111 UTC Sun Mar 31 2019
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES manual administratively down down
GigabitEthernet1/0 10.0.10.106 YES manual up up
--------------------------------------------------------------------------------
('Connecting to Device ', u'10.0.10.107')
('Failed to ', u'10.0.10.107', NetMikoAuthenticationException(u'Authentication failure: unable to connect cisco_ios 10.0.10.107:22\nAuthentication failed.',))
--------------------------------------------------------------------------------
('Connecting to Device ', u'10.0.10.108')
('Failed to ', u'10.0.10.108', NetMikoTimeoutException(u'Connection to device timed-out: cisco_ios 10.0.10.108:22',))
