This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/grafana:7.3.1
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/grafana:7.3.1.30.39
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/grafana:latest
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/grafana:leap15.3.pacific

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.