Hi,
The oslo UUIDField emits a warning if the string used as a field value
does not pass the validation of the uuid.UUID(str(value)) call [3]. All
the offending places are fixed in nova except the nova-manage cell_v2
map_instances call [1][2]. That call uses markers in the DB that are
not valid UUIDs. If we could fix this last offender then we could merge
the patch [4] that changes the this warning to an exception in the nova
tests to avoid such future rule violations.
However I'm not sure it is easy to fix. Replacing
'INSTANCE_MIGRATION_MARKER' at [1] to
'00000000-0000-0000-0000-00000000' might work but I don't know what to
do with instance_uuid.replace(' ', '-') [2] to make it a valid uuid.
Also I think that if there is an unfinished mapping in the deployment
and then the marker is changed in the code that leads to
inconsistencies.
I'm open to any suggestions.
Cheers,
gibi
[1]
https://github.com/openstack/nova/blob/09af976016a83288df22ac6ed1cce1676c2294cc/nova/cmd/manage.py#L1168
[2]
https://github.com/openstack/nova/blob/09af976016a83288df22ac6ed1cce1676c2294cc/nova/cmd/manage.py#L1180
[3]
https://github.com/openstack/oslo.versionedobjects/blob/29e643e4a93333866b33965b68fc8dfb8acf30fa/oslo_versionedobjects/fields.py#L359
[4] https://review.openstack.org/#/c/540386