This container can be pulled via:
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-snmp_notifier:1.2.1
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-snmp_notifier:1.2.1.1.98
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-snmp_notifier:latest
  docker pull registry.opensuse.org/filesystems/ceph/pacific/images/ceph/prometheus-snmp_notifier:leap15.3.pacific

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.