Following what was already implement for CentOS Stream 9 (see the https://lists.centos.org/pipermail/centos-devel/2021-November/098666.html thread), we have also created new tags on cbs.centos.org to let SIG build/push their centos-release-* pkg (containing their public gpg key, and .repo files for dnf/yum) for CentOS Stream 8.

While the extras8s-extras-common-{candidate,testing,release} tags were all created some time ago (and some SIGs already tried this for -testing tag, with pkgs landing on https://buildlogs.centos.org/centos/8-stream/extras/), the -release tag itself was still locked, until the same mechanism that was implemented for Stream 9 would be working for Stream 8.

Now that newer centos-gpg-keys-8-6.el8.noarch and centos-stream-repos- 8-6.el8.noarch packages are available in CentOS Stream 8 BaseOS, that means that we have now unlocked the extras8s-extras-common-release tag and so SIGs can from now on just build and tag their centos-release* packages directly through cbs and not having to ask a CentOS Stream core member to just rebuild it through distro koji (aka https://koji.mbox.centos.org)

PS : as you can see the /8-stream/extras/<basearch>/os/ repo is still there,and still available on every installed CentOS 8s, but is also "frozen" from now on. The new extras-common will be populated with new builds coming from cbs.centos.org koji exclusively (as it's the case for CentOS Stream 9)