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

On Wed, Oct 18, 2017 at 04:48:45PM +0200, 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@testsid85:~ $ virsh iface-dumpxml ens3.180 > ens3.180.xml > [13/785]mh@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? > Hm, weird. Before looking at where the problem is, it could be easier to find if we knew how virt-manager was able to define this. Can you look at the logs for the XML from virt-manager?