This container can be pulled via:
  docker pull registry.opensuse.org/kubic/etcd:3.6.5
  docker pull registry.opensuse.org/kubic/etcd:3.6.5-0
  docker pull registry.opensuse.org/kubic/etcd:3.6.5-0.4.199
  docker pull registry.opensuse.org/kubic/etcd:3.6.5-1
  docker pull registry.opensuse.org/kubic/etcd:3.6.5-1.4.199

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.