nileshsimaria

1. Take a backup of docker.service file.
   $ cp /lib/systemd/system/docker.service /lib/systemd/system/docker.service.orig

2. Modify /lib/systemd/system/docker.service to tell docker to use our own directory 
   instead of default /var/lib/docker. In this example, I am using /p/var/lib/docker
   
   Apply below patch.

   $ diff -uP -N /lib/systemd/system/docker.service.orig /lib/systemd/system/docker.service
   --- /lib/systemd/system/docker.service.orig	2018-12-05 21:24:20.544852391 -0800