Comment 9 for bug 1884217

I'm going to propose that the destroy method doesn't return until the node state is AVAILABLE (also state CLEANFAIL will raise an exception). This means ironic CLEANING and CLEANWAIT will map to nova DELETING, which may last hours depending on the cleaning steps.

As far as I can tell from ironic/driver.py and nova/compute/manager.py, volume[1][2] and vif[3] cleanup happens before the state polling I intend to add, so we might be fine here unless Balazs is referring to other volume/network cleanup.

[1] https://opendev.org/openstack/nova/src/branch/master/nova/compute/manager.py#L3035
[2] https://opendev.org/openstack/nova/src/branch/master/nova/virt/ironic/driver.py#L507
[3] https://opendev.org/openstack/nova/src/branch/master/nova/virt/ironic/driver.py#L508