Appendix H. Changes in Ansible Variables Between Version 2 and 3
With Red Hat Ceph Storage 3, certain variables in the configuration files located in the /usr/share/ceph-ansible/group_vars/ directory have changed or have been removed. The following table lists all the changes. After upgrading to version 3, copy the all.yml.sample and osds.yml.sample files again to reflect these changes. See Upgrading a Red Hat Ceph Storage Cluster for details.
ceph_origin: repository and ceph_repository: rhcs (enabled by default)