Forum Discussion

Eljay's avatar
Eljay
Icon for Cirrus rankCirrus
Mar 07, 2023

Python code using Parallel-SSH library to connect to F5 BigIP

Hi, I'm trying to use Parallel-SSH (Python library) to connect to F5 BigIP. s = SSHClient(<host>,user=<username>, password=<password>, timeout=5, num_retries=1) res = s.run_command("uname") ...
devops
Eljay's avatar
Eljay
Icon for Cirrus rankCirrus

Thanks, JRahm. Now I see that I wasn't crystal clear, I was using the single host client in Parallel-SSH. See examples for both single and multi host here: https://pypi.org/project/parallel-ssh/ 

I can adapt my code to this solution as well. But I still wonder if it's a problem with the single host client in the Parallel-SSH library.

Here's an example that works in Paramiko:

from  paramiko.client import SSHClient

p = SSHClient()
p.load_system_host_keys()
p.connect('<IP>', username=<username>, password=<password>)
stdin, stdout, stderr = p.exec_command('uname')
print(stdout.read().decode())

And here's the code using single host client in Parallel-SSH that fails:

import pssh.exceptions
from pssh.clients import SSHClient

s = SSHClient('<IP>',user=<username>, password=<password>, timeout=5, num_retries=1)
res = s.run_command("uname")
print(res)
for line in res.stdout:
    print(line)

 

JRahm's avatar
JRahm
Icon for Admin rankAdmin
Mar 09, 2023

Hi Eljay ... This also works just fine for me (both with key or password):

from pssh.clients import SSHClient

host = 'ltm15.test.local'
s = SSHClient(host, user='root', password='default')
# s = SSHClient(host, user='root', pkey='/Users/justme/.ssh/id_rsa')
cmd = 'tmsh list ltm pool'

res = s.run_command(cmd)
print(res)
for line in res.stdout:
    print(line)

Output:

/Users/justme/PycharmProjects/playground/venv/bin/python /Users/justme/PycharmProjects/playground/sshtest.py 
	host=ltm15.test.local
	alias=None
	exit_code=None
	channel=<ssh2.channel.Channel object at 0x107c46ef0>
	exception=None
	encoding=utf-8
	read_timeout=None
ltm pool nginx-pool {
    members {
        172.16.102.5:http {
            address 172.16.102.5
            session monitor-enabled
            state up
        }
    }
    monitor http
}

Process finished with exit code 0

My versions:

  • python: 3.11.2
  • ssh-python: 1.0.0
  • ssh2-python: 1.0.0
  • parallel-ssh: 2.12.0
  • BIG-IP: 15.1.8.1

 

  • Eljay's avatar
    Eljay
    Icon for Cirrus rankCirrus
    Mar 13, 2023

    Thanks, JRahm. There's hardly any difference between your and my code.
    My Python version is 3.9, the libraries are the same as yours and I have tested toward BigIP v151.5.1, v15.1.6 (Eng hotfix) and v16.1.x. Still the same problem. I'll try to upgrade Python and reinstall the libraries.

    • JRahm's avatar
      JRahm
      Icon for Admin rankAdmin
      Mar 15, 2023

      any luck? Wondering if you're using root or an alternative account?

      • Eljay's avatar
        Eljay
        Icon for Cirrus rankCirrus
        Mar 22, 2023

        No, I haven't got this working yet. I'll make a workaround with Paramiko because I know that works. I will finish this project first, and try again Parallell-SSH later.

        I use the root user. It works with Paramiko, but fails with Paralllell-SSH.