[ovirt-users] Upgrade Ovirt from 4.2 to 4.4 on CentOS7.4

Hi everyone, I am writing for support regarding the ovirt upgrade. I am using Ovirt with version 4.2 on CentOS 7.4 operating system. The latest release of the Ovirt engine is 4.4 which is available for CentOS 8.Can I upgrade without upgrading the operating system to centos8? I would not be wrong but it is not possible to switch from Centos7 to Centos8 .....Can anyone give me some advice?Thank you all!!!