Comment 4 for bug 1612476

I do not agree that the symptom described should be fixed by keeping the configdrive past server delete. For other Nova drivers, configdrive is regenerated on rebuild (https://github.com/openstack/nova/blob/0da6c6461177539cf69c7c2998f3ce8914112b0a/nova/compute/manager.py#L2576) based on user input, so that we are currently:

1) ignoring user data passed into rebuild and
2) providing different behavior than other nova drivers (by preserving configdrive contents).

I instead propose that post-deployment, we remove the configdrive from the node immediately after deployment, and rebuilding in Ironic will always require re-adding configdrive information to the node.