The updated_at field is defined in the TimestampMixin in oslo.db and says it should change the value on every ONUPDATE trigger:
https://github.com/openstack/oslo.db/blob/master/oslo_db/sqlalchemy/models.py#L139
The instance model in nova extends the TimestampMixin.
The updated_at field is defined in the TimestampMixin in oslo.db and says it should change the value on every ONUPDATE trigger:
https:/ /github. com/openstack/ oslo.db/ blob/master/ oslo_db/ sqlalchemy/ models. py#L139
The instance model in nova extends the TimestampMixin.