When using DCN with storage, after additional Ceph clusters are added at edge sites the central heat stack must be updated [1] so that the cephx keys of the new ceph clusters are available to the ceph clients and so that the central glance configuration had entries for the new glance backends (which are the new ceph clusters). All of this is possible today, but the update of the central stack could be less disruptive. E.g. in theory we should be able to rehub, not restart, the glance contianers and no other services need to be restarted. This RFE tracks giving TripleO the ability to do the above. [1] https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/features/distributed_multibackend_storage.html#update-central-site-to-use-additional-ceph-clusters-as-glance-stores
On resolution undo result of docbug 1868487
This work would be non-trivial and is not a high enough priority to pursue at this time (as per a conversation with PM and Engineering).