The private registry was worked well based on docker 1.10.3,but I can not pull/push images after the docker updated to 1.12.0.
I had modified the /etc/sysconfig/dock
For Mac Users: Update the docker preferences using the (docker) icon in top bar
Preferences -> Daemon -> Insecure Registry [Click (+) sign] -> add :port
hit "Apply & Restart" button at bottom