Re: [libvirt] configuring a disconnected <interface>

On Mon, Jun 24, 2013 at 11:22:16AM +0100, Daniel P. Berrange wrote: > On Sun, Jun 23, 2013 at 03:34:06PM +0300, Dan Kenigsberg wrote: >> On Fri, Jun 21, 2013 at 04:31:53AM -0500, Daniel P. Berrange wrote: >>> So I'm not inclined to support this disconnected mode. >> Disconnected mode exists in actuality. It has valid use cases in the >> virtual world as well. I would like to discuss the domxml schema for >> representing it, and then, hopefully find the menpower to implement it >> outside the core libvirt team. So please, reconsider. > The XML schema is easy enough - it is just a new <interface type=none>. > Ideally we would want some kind of support in QEMU for this, concept > so that we don't have to have a hidden dangling tap device That would be cool indeed. It would make it possible to virDomainUpdateDevice() from a tap-based connectivity to non-tap one. Until we have something like that in qemu, would it be reasonable to implement <interface type=none> via a dangling tap? Wouldn't it be fine to limit changing type=none to type=network only to bridge-based networks?