This server is not RHEL based

Issue

While activating CentOS 7 ELS, using: https://docs.tuxcare.com/extended-lifecycle-support/#centos-7-els

we see the following message:

# This server is not RHEL based

Environment

• CloudLinux 7
• CentOS 7 ELS

Solution

Either switch to CentOS 7 and activate CentOS 7 ELS key or continue using CloudLinux 7 which is, currently, did not require extra steps to activate ELS subscription.

For further information, 

Cause

The server is running CloudLinux, not CentOS 7

Useful links

CloudLinux OS End-of-Life (EOL) details. 

Will the CloudLinux 7 get Extended Lifecycle Support?

How to activate CentOS 7 ELS with an activation key?