Hello,
I am experienced Server adminstrator, having excellent experience with migrating centOS6 to centOS7 on Godaddy VPS server. I can help to upgrade Centos 6 to Centose 7, and assure you, that you don't lost any configuration and files.
I am highly skilled with Centos-7, Nginx, WHM, VPS Server, Ubuntu, Nginx, Plesk, Cpanel, VPS Server, GoDaddy, Server Optimization, AWS EC2 setup, Digital Ocean, Server setup, cPanel/WHM, Debian, Cpanel installation, SSL installation, Website migration, etc.
Regards