Bug 2052404

Description of problem:
When a customer tries to backup a Controller node with ceph monitor in ReaR, 
the "Export ceph authentication" task fails.

~~~
[error 13] error connecting to the cluster\nError: non zero exit code: 13: OCI runtime error"
~~~


The reason seems that the ceph cluster name has been changed from the default ceph, 
and the target cluster could not be specified by the ceph auth export command.

/usr/share/ansible/roles/backup-and-restore/tasks/ceph_authentication.yml:
~~~
...
- name: Export ceph authentication
  shell: |
    set -o pipefail
    {{ tripleo_container_cli }} exec ceph-mon-{{ ansible_facts['hostname'] }} bash -c "ceph auth export" > {{ tripleo_backup_and_restore_ceph_auth_file }}
  become: true
  tags:
    - bar_create_recover_image
~~~


Could you please modify the ceph auth export command so that it can be run in an environment 
where the ceph cluster name has been changed from the default ceph?


Version-Release number of selected component (if applicable):
tripleo-ansible-0.7.1-2.20210603175840.el8ost.8.noarch


How reproducible:
Always


Steps to Reproduce:
If the Ceph cluster name is not the default ceph and running the playbook according to the following documentation[1], an event occur.

[1] https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.1/html-single/backing_up_and_restoring_the_undercloud_and_control_plane_nodes/index#proc_creating-a-backup-of-the-control-plane-nodes_backup-ctlplane

1.
(undercloud) [stack@undercloud ~]$ cat <<'EOF' > ~/bar_rear_create_restore_images-controller.yaml
# Playbook
# Using ReaR on the control plane nodes.
- become: true
  hosts: ceph_mon
  name: Backup ceph authentication
  tasks:
    - name: Backup ceph authentication role
      include_role:
        name: backup-and-restore
        tasks_from: ceph_authentication
      tags:
      -  bar_create_recover_image
- become: true
  hosts: Controller
  name: Create the recovery images for the control plane
  roles:
  - role: backup-and-restore
EOF

2.
(undercloud) [stack@undercloud ~]$ ansible-playbook \
    -v -i ~/tripleo-inventory.yaml \
    --extra="ansible_ssh_common_args='-o StrictHostKeyChecking=no'" \
    --become \
    --become-user root \
    --tags bar_create_recover_image \
    ~/bar_rear_create_restore_images-controller.yaml

Actual results:
The playbook will complete without failing.

Expected results:
Export ceph authentication task fails