Due to some reports in #centos-devel on irc.freenode.net, we thought it would be good to send a reminder at least on this list about the x509 cert/policy for cbs.centos.org :
If you have an account on https://accounts.centos.org and are an active builder/developer using https://cbs.centos.org to build pkgs for one or multiple SIGs, it's worth knowing that initially we had the ~6 months validity period for certificates generated through ACO.
We documented the "Expired Certificate" error on the dedicated wiki page (see https://wiki.centos.org/HowTos/CommunityBuildSystem?#head-e81bf95796a59cbfd0...) but it seems some people forgot about it.
So this is just a reminder that you'd have to check if your cert is still valid if you're using cbs.centos.org.
On our side, we're working on an automated email reminder that would be sent to people having their certs expired or near expiring date. That way you'll know that you just have to use centos-cert (https://wiki.centos.org/HowTos/CentosPackager) to recreate a new cert (and that step will automatically revoke the previous one)
If you have any questions, feel free to discuss this here or in #centos-devel on irc.freenode.net