Fix selinux file labels when set CONTAINER_ROOT_LV_MOUNT_PATH to a directory other than /var/lib/docker

[ghost]

If people use CONTAINER_ROOT_LV_MOUNT_PATH for c-s-s to mount docker runtime storage into places other than /var/lib/docker, they expect that selinux file labels there are set correctly.

[rhvgoyal]

@rhatdan Do you know what needs to be done here?

[rhatdan]

We should set an equivalence label to the label in docker.

semanage fcontext -a -e /var/lib/docker DESTPATH restorecon -R -v DESTPATH

[LongLiveCHIEF]

You would also need to make sure that you use the context= in /etc/fstab to make sure the correct selinux context is applied when the volume is remounted, otherwise you'll wind up with tons of restorecond errors on remounts/reboots.