Unit test failure with Python 3.11

[Thomas Goirand]

Hi,

In Debian, we're trying to switch to 3.11 before the Bookworm freeze in January.

Rebuilding Neutron under Python 3.11 fails:

FAIL: neutron.tests.unit.plugins.ml2.drivers.ovn.mech_driver.test_mech_driver.TestOVNMechanismDriverPortsV2.test__port_provisioned_no_binding
neutron.tests.unit.plugins.ml2.drivers.ovn.mech_driver.test_mech_driver.TestOVNMechanismDriverPortsV2.test__port_provisioned_no_binding
----------------------------------------------------------------------
testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py", line 2817, in setUp
    ovn_conf.cfg.CONF.set_override('ovn_metadata_enabled', False,
  File "/usr/lib/python3/dist-packages/oslo_config/cfg.py", line 2077, in __inner
    result = f(self, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/oslo_config/cfg.py", line 2460, in set_override
    opt_info = self._get_opt_info(name, group)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/oslo_config/cfg.py", line 2869, in _get_opt_info
    group = self._get_group(group)
            ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/oslo_config/cfg.py", line 2838, in _get_group
    raise NoSuchGroupError(group_name)
oslo_config.cfg.NoSuchGroupError: no such group [ovn]

and 145 more like this one...

This looks weird to me though, and unrelated to OVN.

Cheers,

Thomas

[Brian Haley (brian-haley)]

Looks like there are two missing register_opts() calls, a similar bug was fixed last month in that file. I'll push a quick patch but can't test it locally as I'm hitting a python 3.11 issue with yappi/cpython, and there doesn't seem to be a non-voting gate job for it yet.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/neutron/+/864448

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/neutron/+/864448
Committed: https://opendev.org/openstack/neutron/commit/c5ee9f349548b5bc842054aa26118e205c490aa2
Submitter: "Zuul (22348)"
Branch: master

commit c5ee9f349548b5bc842054aa26118e205c490aa2
Author: Brian Haley <email address hidden>
Date: Mon Nov 14 18:06:20 2022 -0500

    Load the required configuration options in the UT classes

    Some test classes are not loading the required configuration options
    during the setup process. That prevents from launching thoses tests
    or classes individually. This patch solves this issue by importing the
    required options in the "setUp" test class method.

    This is breaking python 3.11 on Debian, not possible to test
    in the gate at the moment.

    Closes-Bug: #1996527

    Change-Id: Ie579df7126ca8d09dbedad8d2254c79ec0d3bc32

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 22.0.0.0rc1 release candidate.