In the recent CloudLinux 7 ISO provided (http://docs.cloudlinux.com/installing_new_servers.html ) there is a redundant package included which prevents cPanel from being installed, the installation log ends with:
2015-10-07 03:52:18 1020 (ERROR): When you use CloudLinux™, you must register 2015-10-07 03:52:18 1021 (ERROR): with the CloudLinux Network before you install cPanel & WHM. 2015-10-07 03:52:18 1022 (ERROR): Run the following command to register your server: /usr/sbin/clnreg_ks --force 2015-10-07 03:52:18 1023 (FATAL): The installation process will now terminate...
While we are rebuilding ISO images, the solution is to remove the subscription-manager package from CloudLinux 7:
yum erase subscription-manager
and run cPanel installation again.