Comment 2 for bug 1471172

The following ones are already addressed in 6.1:
- delete removed node from Corosync/Pacemaker cluster (or else deployment of new nodes might fail)
- delete removed node from Ceph cluster (or else ceph -s will report HEALTH_WARN for missing/offline mon)

I'm afraid we won't be able to backport such fixes into 6.0, due to large number of architectural and other changes (like corosync/pacemaker package versions and compatibility).

So in 6.1 user indeed has to manually clean up following:
- delete Neutron agents associated with removed nodes from DB
- delete Nova services associated with removed nodes from DB (or else certain OSTF test will be failing)
But it's not critical since it does not cause denial of service and cloud should operate just fine.