Having found the nice docs at: https://docs.openstack.org/tripleo-docs/latest/install/containers_deployment/tips_tricks.html I have divined that I can ssh to each controller node and: sudo docker exec -u root nova_scheduler crudini --set /etc/nova/nova.conf placement randomize_allocation_candidates true sudo docker kill -s SIGHUP nova_scheduler ...and indeed the /etc/nova/nova.conf in each nova_scheduler container is updated accordingly. Unfortunately, instances are all still launched on compute-0. -- MC -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20181204/41f9ee05/attachment.html>