Moving to Ceph-Ansible as the issue happens during Ansible playbook run. I inspected the Ceph-Ansible code and it seems to support IPv6 addresses there. In ceph-dashboard Grafana is addressed by means of the whole URL (either IPv4, v6 or hostname)
ceph version 14.2.4-85.el8cp
Moving to"VERIFIED" state
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.