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Hi James,

Thanks, that explains a lot. Nova-compute was in enforce mode on the testbed deployment, while it was on complain mode on the other environment. Setting it to complain makes life a lot easier.

Cheers,
Eyle

> On 15 Feb 2021, at 11:06, James Page <james.page at canonical.com> wrote:
> 
> Hi Eyle
> 
> On Mon, Feb 15, 2021 at 9:59 AM Eyle Brinkhuis <eyle.brinkhuis at surf.nl <mailto:eyle.brinkhuis at surf.nl>> wrote:
> Hi,
> 
> Deploying a new testbed, we experience an issue with nova-compute (using canonical charmed openstack Train). We use networking-vpp, that uses python-etcd. After installation of openstack, and configuration of the networking-vpp setup, we cannot start nova-compute anymore:
> 
> Feb 15 09:35:19 sr635-1 nova-compute[131674]: Traceback (most recent call last):
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/bin/nova-compute", line 6, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     from nova.cmd.compute import main
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/nova/cmd/__init__.py", line 16, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     import nova.monkey_patch  # noqa
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/nova/monkey_patch.py", line 98, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     _monkey_patch()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/nova/monkey_patch.py", line 67, in _monkey_patch
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     import oslo_service  # noqa
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/oslo_service/__init__.py", line 16, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     from oslo_log import log as logging
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/oslo_log/log.py", line 41, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     from oslo_config import cfg
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/oslo_config/cfg.py", line 53, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     from oslo_config import types
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/oslo_config/types.py", line 28, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     from debtcollector import removals
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/debtcollector/__init__.py", line 20, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     'debtcollector').version_string()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pbr/version.py", line 467, in version_string
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     return self.semantic_version().brief_string()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pbr/version.py", line 462, in semantic_version
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     self._semantic = self._get_version_from_pkg_resources()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pbr/version.py", line 439, in _get_version_from_pkg_resources
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     import pkg_resources
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3250, in <module>
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     @_call_aside
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3234, in _call_aside
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     f(*args, **kwargs)
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3263, in _initialize_master_working_set
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     working_set = WorkingSet._build_master()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 574, in _build_master
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     ws = cls()
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 567, in __init__
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     self.add_entry(entry)
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 623, in add_entry
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     for dist in find_distributions(entry, True):
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2065, in find_on_path
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     for dist in factory(fullpath):
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:   File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2127, in distributions_from_metadata
> Feb 15 09:35:19 sr635-1 nova-compute[131674]:     if len(os.listdir(path)) == 0:
> Feb 15 09:35:19 sr635-1 nova-compute[131674]: PermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.6/dist-packages/python_etcd-0.4.5.dist-info'
> Feb 15 09:35:19 sr635-1 systemd[1]: nova-compute.service: Main process exited, code=exited, status=1/FAILURE
> 
> Meanwhile, in a different deployment, which runs nova-compute 20.3.0-ubuntu1~cloud0, we do not experience this issue. Permissions of all the packages in /usr/local/lib/python3.6/dist-packages/ are all identical. When we remove all packages once again (python-etcd etc), nova-compute is able to start without any issue.
> 
> Anyone experiencing the same, or has a workaround?
> 
> I've not experienced this directly - have you got the apparmor enabled on one of the deployments but not the other? That's a charm configuration option.  You would also see a DENIED message in the kern.log file if this is enabled (I think).
> 
> Regards
> 
> James

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