[CentOS-devel] Tags structure proposal (and fix) for CBS

When working with Thomas on new signing process, we decided that we'd
use Koji/CBS as single source of truth, so new signing process should
only query koji/cbs and automatically act when there would be something
to do.

Creating so a different thread to discuss the koji tags we have. We
discovered some inconsistencies and we think that $now would be a good
time to fix/move those if needed.

The current proposal would be (and most of the existing tags are
following that convention) :

<sig><dist>-<sig_project>-<sig_project_rel>-<sig_level>
If we take an example for Gluster 7 for CentOS 7, built by Storage SIG,
that means the following tags :
storage7-gluster-7-{candidate,testing,release}

The path where new process would automatically push out (to mirror CDN)
would be so based on koji tag :
mirror.centos.org/{centos,altarch}/<dist>/<sig>/{arch}/<sig_project>-<sig_project_rel>/

Once again, if we take the gluster 7 as an example, that would mean that
process would automatically (for -release tag, with three enabled
arches), push to those paths (created if needed) :

 * http://mirror.centos.org/centos/7/storage/x86_64/gluster-7/
 * http://mirror.centos.org/altarch/7/storage/aarch64/gluster-7/
 * http://mirror.centos.org/altarch/7/storage/ppc64le/gluster-7/

The full path is coming from the koji tag, but we see some issues for
some paths/SIGs (like NFV)

As we think that it would be good to have confirmations from all SIGs
(as they are responsible for content to be pushed out, and also good
time to have EOL content removed), we'd eventually "lock" koji tags for
which we have *not* received confirmation for final destination path.

Other thing we discovered : some SIGs (in the past) have asked for a
"common" tag but then have asked (through cbs-content-control) to have
content from that common tag to be added in other repo.

As we'll *not* use cbs-content-control anymore, the way to deal with
this would be :
- either we use koji tag inheritance (preferred solution)
- or you just "tag-build" yourself when needed from one to the other

The advantage of doing this through koji tag inheritance is the following :
When you request for some tags, and specify what they would need,
nothing else would have to be done and you can just tag-build from
-testing to -release to trigger the sign+push to mirrors (while
tag-build to -testing first would push unsigned pkgs automatically to
buildlogs.centos.org, as usual)

Can we ask each SIG Chair to see which projects/releases are still
needed and so come back (either in this thread of #centos-devel)

Thanks for your collaboration !

-- 
Fabian Arrotin
The CentOS Project | https://www.centos.org
gpg key: 17F3B7A1 | twitter: @arrfab

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