This proposed patch requiring a data migration in Nova master is making Turbo Hipster face plant - https://review.openstack.org/#/c/174480/ This is because we will require Kilo deployers to fully migrate their flavor data from system_metadata to instance_extra before they upgrade to the next release. They (and turbo hipster) will need to do this first: https://github.com/openstack/nova/blob/master/nova/cmd/manage.py#L963 I'm not sure how you want to handle this, either by converting your data sets, or only converting the ones that master runs. It would be nice to merge this patch as soon as grenade is ready to do so, as it's blocking all other db migrations in master. Thanks! --Dan