This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images/opensuse/ceph/ceph:18.0.0.4592
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images/opensuse/ceph/ceph:18.0.0.4592.65.33
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images/opensuse/ceph/ceph:latest
  docker pull registry.opensuse.org/filesystems/ceph/master/upstream/images/opensuse/ceph/ceph:tumbleweed

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.