CentOS 8
Zend Server 2019.x and 2021.x
As CentOS 8 is EOL, you cannot run yum update against the OS repos, which were moved, or any mirror.
That renders a situation which prevents "normal" operations such as update, install and any other repo involved yum command to fail,
thus breaking Zend Server installer (and manual installation).
In case there is a requirement to keep working with Zend Server on a CentOS 8 machine, there is an option to change the CentOS 8 repositories to the Vault copies,
which are further updates, but exists and will allow yum to continue working for 3rd party software like Zend Server, using zend.com repos.
These 2 commands will fix the repos to the Vault, and stop looking up mirrors:
sudo sed -i -e "s|mirrorlist=|#mirrorlist=|g" /etc/yum.repos.d/CentOS-* sudo sed -i -e "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-*
Once the repos have been changed, you can install / upgrade Zend Server on the machine.
Zend Support recommends to use a supported and updated OS for Zend Server, as listed under from the System Requirements.
Current alternatives to CentOS 8 would be Open Logic repos, and RHEL 8.
We plan to add support for Rocky Linux 8 in the near future, and retire CentOS 8 from further releases.
If you have any concern or issue regarding this information, please address those with Zend Global Support.