This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/flannel:0.11.0
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/flannel:0.11.0-9.443
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/flannel:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.