This server is not CentOS Linux release 7.9 | ELS installation

Issue

The following error is observed when trying to configure the ELS server on a CentOS 7 server:
This server is not CentOS Linux release 7.9

sudo sh install-centos7-els-repo.sh --license-key CENTOS7-XXX
This server is not CentOS Linux release 7.9

Are older releases not supported?

Environment

• CentOS 7 
• TuxCare

Solution

We support the state of the system just before EOL, which at the time was running 7.9. Please try to point the existing CentOS repos to the vault which contains the latest version and updates before EOL.
In order to do so, please run the following commands and run yum update:

sed -i.bak 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*

sed -i.bak 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-* 

 
Once done, update the system (yum update) and try to re-run the CentOS 7 ELS installation on your server:

sudo sh install-centos7-els-repo.sh --license-key CENTOS7-XXX

Cause

Server wasn't updated before EOL.