This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/rook/ceph:1.4.5
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/rook/ceph:1.4.5.5
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/rook/ceph:1.4.5.5.6.308
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/rook/ceph:latest
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/rook/ceph:leap15.3.pacific

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.