s3.ceph.unkin.net is the S3 endpoint name (a CNAME to radosgw.service.consul).
The radosgw hosts front RGW with nginx (443 -> radosgw:7480) using the vault
cert, so both the cert and nginx must recognise the name.
- Add s3.ceph.unkin.net to profiles::pki::vault::alt_names (cert SAN).
- Add s3.ceph.unkin.net to profiles::nginx::simpleproxy::nginx_aliases so
nginx answers for it.