Use docker search over proxy on Centos 7

I was playing with docker little bit. After while I found out that I'm unable to interact with docker hub registry. Of course it is proxy. Again.

Install CentOS 7 with kickstart over proxy

In the previous post, I've installed CentOS 7 with kickstart and pxeboot. Unfortunatelly I was doing this in work and of course I'm behind proxy server. It is not as easy as I might think.