[CentOS-devel] xapi on CentOS 6

Wed Apr 1 16:01:33 UTC 2015
Johnny Hughes <johnny at centos.org>

On 03/31/2015 06:59 AM, Jon Ludlam wrote:
> On Tue, Mar 31, 2015 at 11:37:04AM +0100, Karanbir Singh wrote:
>> On 31/03/15 11:17, George Dunlap wrote:
>>> KB / Jonathan / Others,
>>> One of our potential GSoC students, Guatam Malu, has proposed trying
>>> to include xapi packages in the "Xen in a Box" project.
>>> He's gotten packages of xapi building for CentOS 6.6 using XenServer's
>>> buildroot (see below).
>>> The only potential issue I see is about signing.
>> And the content and the origin of content and the build cycle for the
>> entire content stream.
>>> As I understand it, xapi requires a newer version of ocaml than is
>>> available in C6.  The XenServer buildroot includes (and I think
>>> builds) a newer version of ocaml; but (again I think) xapi is
>>> statically linked, so the new ocaml packages are only required for
>>> build, and not for runtime.  At the moment Jonathan is trying to work
>>> with one of the other SIGs to get the necessary ocaml support; it's
>>> not clear when that will happen.
>>> Until that time, the only way to get xapi packages built in koji by
>>> the Virt SIG would be to also include the newer version of ocaml (and
>>> whatever other dependencies there are), which we'd like to avoid.
>> why ? I thought there was traction around the idea of having a full
>> ocaml stack that represents upstream ocaml.
>>> So the question is: Do we need to have all the packages on "Xen in a
>>> Box" CD signed with the CentOS SIG key?  If so, do we see any
>>> likelihood that this might be possible by July -- either having a
>>> suitable ocaml to build against in koji, or getting the packages built
>>> and signed some other way?
>> given that there are packages for ocaml, if someone was working on this
>> as a primary focus, I dont see why it should be more than a couple of
>> weeks worth of work to get them building. The key part here is going to
>> be knowledge of ocaml itself.
> I believe the idea was to use an OCaml SCL for this, and then when the
> softwarecollections.org became a CentOS SIG, the virt SIG could depend
> upon it.
> I've been working on this here:
> http://copr.fedoraproject.org/coprs/jonludlam/ocaml402/builds/
> and here:
> https://github.com/jonludlam/ocaml402-buildroot
> I had some initial feedback from the SCL guys and have incorporated
> that, and the packages have had some testing by us, Jane Street and
> OCamlLabs.  I think the next step is to do whatever is necessary for
> the SCL to become an 'official' one.
> Jon

I have no idea if those SCL's can build on our koji CBS now or not.  But
if you can build EL6 RPMs that work with themselves, c6-extras, c6-os,
c6-updates, c6-centosplus then I would be happy to grab the and put them
in the xen4 or centosplus repos for the Virt SIG to use.

Same for the EL7 ones if George needs them for xen on c7.

Johnny Hughes

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