如何使用ansible创建docker镜像？

通过playbook和dockerfile相结合的方式生成镜像, 示例如下:

FROM ansible/ubuntu14.04-ansible:stable
MAINTAINER xxx
ADD ansible /srv/ansible
WORKDIR /srv/ansible
RUN ansible-playbook web-app.yaml -c local
VOLUME /srv/project/static
WORKDIR /srv/project
EXPOSE 8000
CMD ["gunicorn_django", "-c", "gunicorn.conf.py"]