The documentation on how to integrate an external Ceph cluster with the Overcloud [1] should be updated as follows:


a) in section 3.1 we should create more pools, because more services can use Ceph now, specifically: "backups" for cinder-backup and "metrics" for gnocchi-metricsd


b) in section 3.1 the capabilities given to the user must be updated to allow it to use the additional pools:

ceph auth add client.openstack mon 'allow r' osd 'allow class-read object_prefix rbd_children, allow rwx pool=volumes, allow rwx pool=vms, allow rwx pool=images', allow rwx pool=backups, allow rwx pool=metrics


c) in section 3.6 the resource name and implementation file changed as we now use 'roles'

OS::TripleO::CephClusterConfig::SoftwareConfig: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/ceph/ceph-external-config.yaml

becomes instead:
  OS::TripleO::Services::CephExternal: /usr/share/openstack-tripleo-heat-templates/puppet/services/ceph-external.yaml


1. https://access.redhat.com/documentation/en/red-hat-openstack-platform/9/paged/red-hat-ceph-storage-for-the-overcloud/chapter-3-integrating-an-existing-ceph-storage-cluster-in-an-overcloud