解决cannot mount volume over existing file, file exists /var/lib/docker/aufs/mnt/

问题: cannot mount volume over existing file, file exists /var/lib/docker/aufs/mnt/0ac71fed1af802a4ecf4a93bd2b3a7b2e6adab2cf93ee28357712afe6d5e1f47/etc/nginx/nginx.conf

我用docker搭建php开发坏境的时候 ,遇到了上面的问题,经过查询 ,这是一个低版本docker-compose 的bug,
我当时用的是1.1版本,我根据官方的文档卸载了docker-compose ,重新安装了更高的版本;
官方文档链接是https://docs.docker.com/compose/install/
1

Uninstallation
To uninstall Docker Compose if you installed using curl:

$ rm /usr/local/bin/docker-compose

2

$ curl -L https://github.com/docker/compose/releases/download/1.6.0/run.sh > /usr/local/bin/docker-compose
$ chmod +x /usr/local/bin/docker-compose

3 docker-compose up -d

完美解决了上面的问题.