This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images_arm/ceph/ceph:15.1.0
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images_arm/ceph/ceph:15.1.0.4.1
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images_arm/ceph/ceph:latest
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images_arm/ceph/ceph:leap15.2.upstream

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.