This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/nautilus/images/rook/ceph:1.2.7
  docker pull registry.opensuse.org/filesystems/ceph/nautilus/images/rook/ceph:1.2.7.0
  docker pull registry.opensuse.org/filesystems/ceph/nautilus/images/rook/ceph:1.2.7.0.5.199
  docker pull registry.opensuse.org/filesystems/ceph/nautilus/images/rook/ceph:latest
  docker pull registry.opensuse.org/filesystems/ceph/nautilus/images/rook/ceph:leap15.1.nautilus

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.