socket.gaierror: [Errno 8] nodename nor servname provided, or not known

[Kaushal Shriyan]

Hi,


> cat fabfile.py
> from fabric import task, Connection

@task
> def check_kernel_version(c):
>     password = 'dac@123'
>     connect_kwargs = {'password': password}
>     connection = Connection(host="192.168.0.188", user="root",
> connect_kwargs=connect_kwargs)
>     result = connection.run('uname -a')

@task
> def check_os_version(c):
>     connect_kwargs={"key_filename": "/Users/kaushalshriyan/.ssh/id_rsa"}
>     for host in ('192.168.0.167', '192.168.0.79', '192.168.0.151'):
>         connection = Connection(host="host", user="root",
> connect_kwargs=connect_kwargs)
>         result = connection.run('uname -a')



$ fab2 check-kernel-version
Linux hsbcobsstomcatbahrainms 3.10.0-1160.59.1.el7.x86_64 #1 SMP Wed Feb 23
16:47:03 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.9/bin/fab2", line
8, in <module>
    sys.exit(program.run())
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/invoke/program.py",
line 384, in run
    self.execute()
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/invoke/program.py",
line 566, in execute
    executor.execute(*self.tasks)
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/invoke/executor.py",
line 129, in execute
    result = call.task(*args, **call.kwargs)
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/invoke/tasks.py",
line 127, in __call__
    result = self.body(*args, **kwargs)
  File "/Users/kaushalshriyan/fabfile.py", line 15, in check_os_version
    result = connection.run('uname -a')
  File "<decorator-gen-10>", line 2, in run
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/fabric/connection.py",
line 29, in opens
    self.open()
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/fabric/connection.py",
line 636, in open
    self.client.connect(**kwargs)
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/paramiko/client.py",
line 340, in connect
    to_try = list(self._families_and_addresses(hostname, port))
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/paramiko/client.py",
line 203, in _families_and_addresses
    addrinfos = socket.getaddrinfo(
  File
"/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/socket.py",
line 953, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known
$

I have defined def check_kernel_version(c) in the fabile.py but when i

$fab2 check_kernel_version
No idea what 'check_kernel_version' is!

$fab2 check-kernel-version
Linux hsbcobsstomcatbahrainms 3.10.0-1160.59.1.el7.x86_64 #1 SMP Wed Feb 23
16:47:03 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

I am not sure how does it work?

For $ fab2 check-os-version
I am encountering socket.gaierror: [Errno 8] nodename nor servname
provided, or not known

Please guide. Thanks in advance.

Best Regards,

Kaushal