[Libvir] Inconsistent networking between Xen & QEMU
Daniel P. Berrange
berrange at redhat.com
Fri Mar 9 14:32:44 UTC 2007
On Fri, Mar 09, 2007 at 02:27:02PM +0000, Mark McLoughlin wrote:
> On Fri, 2007-03-09 at 03:03 +0000, Daniel P. Berrange wrote:
> > To improve life for the tools though I'd like to do two things as a high
> > priority
> >
> > - Support managed networks in Xen - we can simply lookup the bridge
> > device associated with a network and tell Xen to use vif-bridge with
> > this device.
>
> We already have this in libvirt. See virDomainParseXMLIfDesc()
Ahh I missed that. I will have to write some tests for that I think,
although it'll require extending the test:///default driver to support
the networking APIs :-)
> > For the reverse Xen will tell us what bridge device a
> > guest is using, and we can reverse lookup the corresponding network
>
> I'm not sure why you want this?
Without this you be sending in
<interface type='network'>
<source network='foo'>
</interface>
And be getting back
<interface type='bridge'>
<source bridge='virbr0'>
</interface>
As far as is possible the XML used to create a VM should be identical
to that you get back from libvirt once it is running.
> > - Support non-managed networks in QEMU - we can simply enslave the
> > QEMU tap device to an arbitrary user specific bridge device.
>
> Yes, we should definitely have this.
Ok, I'll add that - it should be trivial since the tricky enslaving
code is already there.
Dan.
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