Issues finding python nbd module after update of python

[rettw78]

Hi -

I have been running virtnbdbackup successfully as a backup solution for a few months now on a couple of Arch Linux based KVM hosts. After a recent update virtnbdbackup now fails with the following error message:

/usr/bin/virtnbdbackup:4: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import('pkg_resources').run_script('virtnbdbackup==1.9.45', 'virtnbdbackup')
Traceback (most recent call last):
File "/usr/bin/virtnbdbackup", line 4, in
import('pkg_resources').run_script('virtnbdbackup==1.9.45', 'virtnbdbackup')
File "/usr/lib/python3.11/site-packages/pkg_resources/init.py", line 722, in run_script
self.require(requires)[0].run_script(script_name, ns)
File "/usr/lib/python3.11/site-packages/pkg_resources/init.py", line 1572, in run_script
exec(script_code, namespace, namespace)
File "/usr/lib/python3.11/site-packages/virtnbdbackup-1.9.45-py3.11.egg/EGG-INFO/scripts/virtnbdbackup", line 33, in
File "/usr/lib/python3.11/site-packages/virtnbdbackup-1.9.45-py3.11.egg/libvirtnbdbackup/nbdcli/init.py", line 21, in
File "/usr/lib/python3.11/site-packages/virtnbdbackup-1.9.45-py3.11.egg/libvirtnbdbackup/nbdcli/client.py", line 21, in
ModuleNotFoundError: No module named 'nbd'

I have made sure all dependencies on arch are installed as they were before the update (which included python 3.11.3-> 3.11.5) and I have been unable to fix the missing module. Archlinux needs nbdkit installed from the AUR to provide nbd functions/plugins, and also tried the latest virtnbdbackup version. Any help would greatly appreciated.

Let me know if you need additional information.

Thanks,

Rett

[abbbi]

it seems you are missing the python libnbd bindings, im not using arch so i cant tell which package you would have to install (on debian, its python3-libnbd)

It not quite virtnbdbackup related, i guess if you simply do

python3 -c "import nbd"

you probably run into the same issue. Guess the new python version either comes without the module or you need to
setup the module for your new python 3.11.5 installation.

[rettw78]

Thanks for the reply. It appears that arch no longer supplies this package in any form that I can find. I found that if I compile an old version of libnbd from git I can get the python bindings for nbd back, however this seems like a hacky way of doing things. I will see if I can get someone on the Archlinux side to tell me why this is no longer available.