[ovirt-devel] Adding s390 support to oVirt

[Viktor Mihajlovski]

On 16.11.2017 18:27, Barak Korren wrote:
> On 16 November 2017 at 18:52, Viktor Mihajlovski
> <mihajlov at linux.vnet.ibm.com> wrote:
>>
>> Short update, with yesterday's API model 4.2.25 release, there's basic
>> support for s390 available in ovirt-engine. At this point in time, there
>> are no ovirt yum repositories for the s390x architecture - not sure what
>> the process would be to add s390x repositories and how to build the
>> binary RPMs at least for the host packages (i.e. vdsm-*). Maybe it would
>> possible to use the s390-koji infrastructure used to build Fedora for s390x?
> 
> Koji is very opinionated about how RPMs and specfiles should look,
> AFAIK A pretty massive amount of work would be needed to make
> everything that is needed for a node to build on it, and then we would
> end up with a process that is quite different with how we currently do
> builds for other platforms.
> 
> (I might be wrong about this, since some oVirt packages get also built
> as part of the CentOS virt SIG, and that is done using Koji as well)
> 
> More specifically, Koji usually assumes the starting point for the
> build process would be a specfile, while in oVirt we typically
> generated the specfile and then the RPM as part of a bigger build
> process.
> 
> Does fedora have an s390x server associated to it?
There's a build system for Fedora on s390x:
https://s390.koji.fedoraproject.org/koji
> We do use the same basic environment setup tool - mock - as the basis
> of our build infrastructure, so if Fedora is actually emulating s390x
> is some way while using mock, we might be able to do the same thing.
> 
> Just for general knowledge, the process for building oVirt repos, is
> to have *-build-artifacts-* jobs for each project that build RPM's
> after patches get merged, and then have the change-queue to collect
> the built packages, rung them through ovirt-system-tests (a.k.a. OST)
> and finally deposit them into the 'tested' rpoe, from which they are
> copied nightly to the '*-snapshot' repos.
> 
> OST only tests for CentOS 7/x86_64 ATM, but we bring along packages
> for other distros and architectures via the same process while
> assuming that if a package for a given commit works for CentOS
> 7/x86_64 it would probably work for other platforms as well...
> 
I've noticed that there's no test automation for non-x86 arches. How are
the ppc64le packages then built and stored in the repos?

Would it be conceivable to do the following?
After a successfull build and OST of a package, take the SRPM and submit
to s390-koji to produce the s390x binary RPMs.
Then copy the binary RPMs into the respective repository, e.g.
*-snapshot/rpm/el7/s390x (and update the repository metadata).

-- 

Mit freundlichen Grüßen/Kind Regards
   Viktor Mihajlovski