ParallelSSHClient - Python - Handle authentication errors - python-3.x

Question

I have a problem which I didn't found the solution here.
I am working with SSHClient for connecting to multiple servers.
But, if there is 1 server in the list that I cannot access with my username and password (SSH), it's throwing me an exception.
I've tried to work with try and except but it didn't work.
Here is my original code:
from pssh.clients import ParallelSSHClient
import configparser
res = []
servers = ['test1', 'test2', 'test3', 'test4']
client = ParallelSSHClient(servers, user='test', password='test')
output = client.run_command('service ntpd status')
client.join(output)
for host_out in output:
for line in host_out.stdout:
if 'running' or 'Running' in line:
continue
else:
res.append(host_out.host + ' is not running')
if res:
return res
else:
return "All servers are running"
server test2 isn't accessible with my username so the script is throwing me an exception and failing the script:
pssh.exceptions.AuthenticationError: No authentication methods succeeded
How can I continue the script without the server test2 (if it is not accessible)

Answer 1

try something like this:
from pssh.clients import ParallelSSHClient
from pssh.config import HostConfig
host_config = [
HostConfig(user='user',
password='pwd'),
HostConfig(user='user',
password='pwd'),
HostConfig(user='user',
password='pwd')
]
servers = ['10.97.180.90', '10.97.180.99', "10.97.180.88"]
client = ParallelSSHClient(servers, host_config=host_config, num_retries=1, timeout=3)
output = client.run_command('uname -a', stop_on_errors=False, timeout=3)
for host_output in output:
try:
for line in host_output.stdout:
print(line)
exit_code = host_output.exit_code
except TypeError:
print("timeOut...")
And output looks like this:
Linux hostName-001 3.10.0-957.21.3.el7.x86_64 #1 SMP Fri Jun 14 02:54:29 EDT 2019 x86_64 x86_64 x86_64 GNU/Linux
Linux hostName-003 3.10.0-1160.15.2.el7.x86_64 #1 SMP Thu Jan 21 16:15:07 EST 2021 x86_64 x86_64 x86_64 GNU/Linux
timeOut...
More info can be found here on stackoverflow:
Python parallel-ssh run_command does not timeout when using pssh.clients