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Re: [Xen-devel] [ovs-dev] [PATCH] hotplug: add openvswitch script

On Thu, Apr 18, 2013 at 01:08:40PM +0100, Ian Campbell wrote:
> On Thu, 2013-04-18 at 12:50 +0100, Ian Campbell wrote:
> > Based on Waldi's RFC at
> > http://lists.xen.org/archives/html/xen-devel/2012-09/msg00943.html
> > 
> > To use it set vif.default.script="vif-openvswitch" in /etc/xen/xl.conf or 
> > use
> > script=vif-openvswitch in the vif configuration.
> > 
> > Appears to do the right thing for PV and HVM guests (including tap devices)
> > and with stubdomains.
> > 
> > In order to support VLAN tagging and trunking the "bridge" specified in the
> > configuration can have a special syntax, that is:
> > 
> > 
> > e.g.
> > - xenbr0.99
> >      add the VIF to VLAN99 on xenbr0
> > - xenbr0:99,100,101
> >      add the VIF to xenbr0 as a trunk port receiving VLANs 99, 100 & 101
> > 
> > Waldi, can you confirm if I have correctly reverse engineered the syntax 
> > from
> > the regexp please ;-)
> I've done this as a Xen patch, but in principal this could also be
> maintained in the openvswitch tree (I've added their list to the CC,
> having forgotten it with the initial posting). Anyone have any strong
> preference for one home over the other?

It looks to me like the proposed script uses only Open vSwitch
interfaces (via ovs-vsctl) that have been stable for a long time.  My
guess is that Xen users will be more likely to easily find this script
if it is in the Xen distribution than if it is in the Open vSwitch one.
So I would be inclined to believe that Xen is the right place for it.

That said, we'd be happy to include it with OVS if you think the balance
falls the other way.



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