This container can be pulled via:
  docker pull registry.opensuse.org/kubic/etcd:3.6.4
  docker pull registry.opensuse.org/kubic/etcd:3.6.4-0
  docker pull registry.opensuse.org/kubic/etcd:3.6.4-0.7.181
  docker pull registry.opensuse.org/kubic/etcd:3.6.4-1
  docker pull registry.opensuse.org/kubic/etcd:3.6.4-1.7.181
  docker pull registry.opensuse.org/kubic/etcd:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.