ceph.conf file is wrong. The ceph.conf file generated by the cluster install does have some tabs at the beginnings of the lines # minimal ceph.conf for 27feb4aa **************** [global] fsid = 27feb4aa-*************** mon_host = [ xxxxxxxxxxxxxxxx ... ] in the kolla-ansible docs, the example ceph.conf file does not have any tabs https://docs.openstack.org/kolla-ansible/zed/reference/storage/external-ceph...