[Engine-devel] Network Wiring

[Dan Kenigsberg]

On Thu, Nov 15, 2012 at 03:04:45PM -0500, Simon Grinberg wrote:
> 
> > 
> > NX users may confuse between connected to vm or connected to the
> > switch (despite of <plugged>),
> > as they used to <link>=up|down<link/>
> > 
> 
> Yap, no convergence on terminology yet, right?
> 
> I think we need to keep the plugged/unplugged not to confuse libvirt users

Yes, with real iron nics (and hard drives), the term
"hotplug" is widely understood as "shove a new device into a running
machine". So I see no reason to change anything.
But I do not see how this is related to libvirt (which does not have an
API call named *plug*). 

> however let's do wired/un-wired = link-up / link-down it's understood by everyone and Michael pointed out

I'm fine with that.

> 
> What about allowing a nic with the no-network? Did not see discussion on this.

> It is useful as an interim state when changing networks or if the nic
> is there to be use by a hook. This may also be useful when allowing to
> purge a network while it is connected to VMs: Link-Down on all nics
> and connect to the empty/no network. (Yes I know, it's not par of the
> feature, but you know someone will ask for it soon :))

It should not be hard to implement; In
http://wiki.ovirt.org/wiki/Feature/DetailedNetworkWiring#New_API I suggest passing
no 'network' element to mean "connected to nothing".

> 
> The coupling between vNIC and LN should break - for this feature (that I hate to call it wired) and for future to come.  
> 
> Simon.