[ovirt-devel] FC27 updates broken for ovirt-4.2

[Dan Horák]

On Tue, 27 Feb 2018 16:26:28 -0500
Cole Robinson <crobinso at redhat.com> wrote:

> On 02/27/2018 08:03 AM, Dan Horák wrote:
> > On Tue, 27 Feb 2018 13:54:06 +0100
> > Viktor Mihajlovski <mihajlov at linux.vnet.ibm.com> wrote:
> > 
> >> On 27.02.2018 13:35, Nir Soffer wrote:
> >>> בתאריך יום ג׳, 27 בפבר׳ 2018, 13:25, מאת Dan Horák
> >>>  ‏<dan at danny.cz>:
> >>>
> >>>> On Tue, 27 Feb 2018 10:13:15 +0100
> >>>> Viktor Mihajlovski <mihajlov at linux.vnet.ibm.com> wrote:
> >>>>
> >>>>> On 27.02.2018 01:26, Nir Soffer wrote:
> >>>>>> בתאריך יום ב׳, 26 בפבר׳ 2018, 22:10, מאת Yaniv Kaul
> >>>>>>  ‏<ykaul at redhat.com>:
> >>>>>>
> >>>>>>> On Mon, Feb 26, 2018 at 7:17 PM, Viktor Mihajlovski <
> >>>>>>> mihajlov at linux.vnet.ibm.com> wrote:
> >>>>>>>
> >>>>>>>> I just tried to update the ovirt packages on my FC27 host,
> >>>>>>>> but failed due to https://gerrit.ovirt.org/#/c/87628/
> >>>>>>>>
> >>>>>>>> vdsm now requires libvirt >= 3.10.0-132 but Fedora 27 has
> >>>>>>>> only 3.7.0-4 the moment.
> >>>>>>>>
> >>>>>>>> It's generic Fedora 27, but since I run on s390,
> >>>>>>>> cross-posting to s390 list.
> >>>>>>>>
> >>>>>>>> I guess there's good reason to require libvirt 3.10. Is there
> >>>>>>>> any chance that we can get libvirt updated for Fedora 27?
> >>>>>>>>
> >>>>>>>
> >>>>>>> Perhaps use the virt-preview[1] repo for now?
> >>>>>>>
> >>>>>>
> >>>>>> Yes, we require virt-preview for Fedora. This is why that patch
> >>>>>> did not fail in the CI.
> >>>>> Makes sense, unfortunately virt-preview doesn't contains s390
> >>>>> binaries at this point in time. Would be great if at least
> >>>>> libvirt and qemu could be built for s390.
> >>>>
> >>>> looks like it's even x86_64 only, /me wonders what it would
> >>>> require to offer other arches (aarch64, ppc64le, s390x) as well
> >>>>
> >>>
> >>> If we need to support platform not supported in virt-preview, we
> >>> need to chage the requirement so it is used only on x86_64.
> >>>
> >>> Victor, would you like to send a patch?
> >> I believe there was a good reason to bump the libvirt requirement
> >> in the vdsm package (some bugfix). Ideally, virt-preview should be
> >> build for s390 as well.
> >> If I'm not mistaking, the script
> >> https://github.com/crobinso/build-fedora-virt-preview is used to
> >> build the RPMs and populate the repository.
> >>
> >> Dan, Cole: what would it take to run this on the fedora-390 build
> >> machine?
> > 
> > after a brief look the script needs to be made multi-arch-aware (it
> > hard-codes x86_64 in some places), when it calls mock, and then it
> > needs some HW (we have ppc64le and s390x even now, aarch64 might
> > take a while), overall it looks doable to me. Cole, what do you
> > think?
> > 
> 
> I'm open to the idea in theory but in practice right now the script
> uses mock locally so it's basically tied to the one build machine I
> use which is x86. I have arm32 and aarch64 hardware locally but TBH I
> have very little interest in running a build farm and dealing with
> all the issues of connecting to remote machines, pulling down build
> output, etc. In fact I've been meaning to move virt-preview to copr
> for a long while which is going to tie it even deeper to x86, this
> would make virt-preview easier to enable and let me scrap much of my
> custom code for building/uploading repo contents.

copr would give us ppc64le and probably aarch64 too in addition to x86,
but can't help with s390. We already have build infra internally
covering all arches driven by Jenkins, with plans to move the workloads
to CentOS infra. I'll look whether or how it could be used for
multi-arch virt-preview repos. 

> We could re-implement it using koji scratch builds which have multiple
> arch support nowadays but I did that in the past for x86 and I recall
> feeling it was quite brittle, though I don't remember the details,
> maybe it was just my implementation.

I suspect the problem with koji scratch builds in this case is that
they can't be used in buildroots, which the virt-preview stack requires.


		Dan