[CentOS-devel] xapi on CentOS 6

Jon Ludlam

jonathan.ludlam at citrix.com
Tue Mar 31 11:59:04 UTC 2015

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:


and here:


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.


> -- 
> Karanbir Singh
> +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh
> GnuPG Key : http://www.karan.org/publickey.asc
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