Virtsimple works on CentOS 7 machines - once you sell one to your customer, we'll deliver a virtualization panel for it. All you need is a WHMCS instance and our WHMCS Virtsimple Reseller addon.
Through the addon you'll deploy new instance of Virtsimple. Each dedicated server gets a new panel instance that's hosted in the cloud and can be accessed through a unique URL.
or use the command line
wget --no-check-certificate 'Error retrieving URL, please get latest plugin URL from https://www.virtsimple.com/downloads/'
rm -rf virtsimple
unzip 'Error retrieving URL, please get latest plugin URL from https://www.virtsimple.com/downloads/'
Your customer gets an invitation email to your panel and that's all - they can virtualize their dedicated server in few clicks. Questions? firstname.lastname@example.org - we'll gladly help, advise or setup a demo call!