Docker deletes all containers

  docker, question
root@iZ28krk4xlkZ:/var/lib# docker rm `docker ps -a -q`
 958e1b65cde0
 f4997df56049
 4c258585a82c
 3e4021f0b9e6
 79537a175735
 95751e6b23bf
 root@iZ28krk4xlkZ:/var/lib# docker images
 REPOSITORY              TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
 swarm                   latest              eb7c36c2df64        18 hours ago        17.15 MB
 rethinkdb               latest              53c589ee884f        26 hours ago        181.8 MB
 alpine                  latest              2314ad3eeb90        2 weeks ago         4.794 MB
 shipyard/docker-proxy   latest              276373c72857        5 weeks ago         9.468 MB
 shipyard/shipyard       latest              4db14669ff0c        8 weeks ago         58.73 MB
 ehazlett/curl           latest              b26cc0beea49        5 months ago        8.751 MB
 microbox/etcd           latest              96192a5fe39d        5 months ago        17.87 MB

They have all been deleted. Why do you still have the mirror?

What you delete is the instance where the image is running. To delete the image, use docker rmi+image name or that string of characters.