[libvirt] libvirt not wanting to read back its own interface XML

[Marc Haber]

On Thu, Oct 19, 2017 at 11:52:34AM +0200, Michal Privoznik wrote:
> On 10/18/2017 04:48 PM, Marc Haber wrote:
> > Hi,
> > 
> > I'm trying to give libvirt knowlegde of a VLAN interface that is
> > configured by a different means and not by libvirt. To figure out the
> > syntax, I created a VLAN interface through virt-manager and dumped out
> > the XML:
> > 
> > <interface type='vlan' name='ens3.180'>
> >   <protocol family='ipv6'>
> >     <ip address='2a01:4f8:150:436c::55:100' prefix='64'/>
> >     <ip address='fe80::5054:ff:fe30:e0d1' prefix='64'/>
> >   </protocol>
> >   <link speed='4294967295' state='up'/>
> >   <vlan tag='180'>
> >     <interface name='ens3'/>
> >   </vlan>
> > </interface>
> > 
> > I then removed the Interface in virt-manager and tried to have libvirt
> > read back its own XML.
> > 
> > [12/784]mh at testsid85:~ $ virsh iface-dumpxml ens3.180 > ens3.180.xml
> > [13/785]mh at testsid85:~ $ virsh iface-define ens3.180.xml
> > error: Failed to define interface from ens3.180.xml
> > error: XML error: could not get interface XML description: XML invalid - Expecting an element start, got nothing
> > 
> > What is going on here? How do I define a VLAN interface via XML?
> 
> This is weird. However, I'm unable to reproduce with the latest libvirt.
> What's your version? Have you tried the latest one?

I have Debian unstable, libvirt 3.8.0.

Greetings
Marc

-- 
-----------------------------------------------------------------------------
Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany    |  lose things."    Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature |  How to make an American Quilt | Fax: *49 6224 1600421