We are running Graylog open version Graylog 3.3.9 on CentOS Linux release 7.9.2009 (Core), but we need to upgrade the OS to Centos 8 or 9 as the current version will not be supported by the end of June 2024.
The question is if our Graylog version will run with no issue on the next version of Centos.
Just so happen I have GL 3.3.9. I Still think that was the best version out
As for Red hat Im not sure but I never have an issue with any CentOS/RH versions.
Looks like from the documentation you should be good.