https://bugzilla.redhat.com/show_bug.cgi?id=1192081
--- Comment #13 from Jim Perrin jperrin@centos.org --- The docker library folks weren't receptive to CentOS (or anyone else) defining volumes for /tmp and /run. They felt (at the time, dunno if it's changed) that this should be for users to do, and didn't belong in the base containers.