[SOLVED] Handle a missing SSH connection

Issue

In order to connect via SSH I'm using the following code:

import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(IP, username=USER, password=PSW,look_for_keys=False)

my question is, how can I handle a missing connection? In particular I'd like that in case the connection is not established the code goes (maybe with a GOTO?) to another point of the code where basically I restart the server.

Solution

You could simply use a try and catch the exception as mentioned by martin-prikryl, such as:

try:
    client.connect(host="192.168.0.8",
                   username="user1",
                   password="password1234"
                   )
except AuthenticationException:
    print("Authentication failed, please verify your credentials: %s")
except SSHException as sshException:
    print("Unable to establish SSH connection: %s" % sshException)

For other examples of ssh exceptions you can look at https://www.programcreek.com/python/example/7495/paramiko.SSHException

Answered By - Nuzvee

Answer Checked By - Marilyn (WPSolving Volunteer)