Comment 6 for bug 1733933

See: https://docs.openstack.org/nova/latest/user/cellsv2-layout.html

And: https://github.com/openstack-dev/devstack/blob/master/stackrc#L80

The failure on reschedule thing is a default behavior in devstack with the CELLSV2_SETUP flag. Set that to 'singleconductor' in devstack if you want / need reschedules.

We're working on the fixes in nova long-term in this blueprint in Queens:

https://specs.openstack.org/openstack/nova-specs/specs/queens/approved/return-alternate-hosts.html