[wallaby]nova, oslo.db or SQLAlchemy bug? "no attribute statement"

Herve Beraud hberaud at redhat.com
Tue May 18 14:10:19 UTC 2021


Hello,

SQLAlchemy 1.4 requested some adaptations in various places (oslo.db, nova,
cinder etc).

Without digging into your issue, oslo.db 8.6.0 at least is required to
support this version of SQLAlchemy [1].

Also you should notice that various patches are required on Nova and other
services too [2][3][4][5]. I think that the services deliverables (nova,
cinder, etc) should be released to propagate their fixes more widely and
surely fix your context.

For further reading please have a look to [6].

[1] https://review.opendev.org/c/openstack/releases/+/788488
[2] https://review.opendev.org/c/openstack/nova/+/788471
[3] https://review.opendev.org/c/openstack/placement/+/789921
[4] https://review.opendev.org/c/openstack/masakari/+/790216
[5] https://review.opendev.org/c/openstack/cinder/+/790797
[6] https://review.opendev.org/c/openstack/requirements/+/788339

Le mar. 18 mai 2021 à 13:57, tjoen <tjoen at dds.nl> a écrit :

> Python-3.9.4
> nova-23.0.1
> oslo.db-8.5.0
> SQLAlchemy-1.4.15
>
> docs.openstack.org/install-guide/launch-instance-provider.html
> $ openstack server list
> Status is SHUTDOWN
> $ openstack server start provider-instance
> results in
> site-packages/oslo_db/sqlalchemy/update_match.py", line 489, in
>    _update_context.statement.froms[0]
> ERROR nova.api.openstack.wsgi AttributeError: 'QueryContext' object
>           has no attribute 'statement'
>
> site-packages/oslo_db/sqlalchemy/update_match.py  line 488 and 489:
>      context = query._compile_context()
>      primary_table = context.statement.froms[0]
>
> site-packages/sqlalchemy/orm/query.py
>      def _compile_context(self, for_statement=False):
>          compile_state = self._compile_state(for_statement=for_statement)
>          context = QueryContext(
>          context = QueryContext(
>              compile_state,
>              compile_state.statement,
>              self._params,
>              self.session,
>              self.load_options,
>          )
>          return context
>
> nova, oslo.db or SQLAlchemy bug?
>
>

-- 
Hervé Beraud
Senior Software Engineer at Red Hat
irc: hberaud
https://github.com/4383/
https://twitter.com/4383hberaud
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