Re: [Libvir] Virtual networking

["Daniel P. Berrange" <berrange redhat com>]

On Tue, Jan 16, 2007 at 04:42:21PM +0000, Richard W.M. Jones wrote:
> Hugh Brock wrote:
> >Daniel P. Berrange wrote:
> >
> >>3. The way I think you re suggesting - a libvirt server on every remote
> >>   host which calls into the regular libvirt internal driver model to
> >>   proxy remote calls. So even if the hypervisor in question provides a
> >>   remote network management API, we will always use the local API and
> >>   do *all* remote networking via the libvirt server
> >>
> >>   http://people.redhat.com/berrange/libvirt/libvirt-arch-remote-2.png
> >>
> >This strikes me as *much* easier to manage, and the most consistent 
> >thus far with the idea that libvirt should remain as 
> >hypervisor-neutral as possible.
> 
> I guess the management issue is going to be versioning the protocol.  If
> the protocol is just a direct mapping of vir* calls and structures then
> you'll quickly end up in a situation where even the smallest change
> requires you to upgrade the world or old versions have to be maintained
> indefinitely.

We only have to be able to safely add new functions, because we are
already anticipating having to maintain 100% ABI compatability for 
existing public facing structs & functions indefinitely. 

Regards,
Dan.
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