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

Marc Haber mh+libvir-list at zugschlus.de
Wed Oct 18 14:48:45 UTC 2017


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'/>
  <link speed='4294967295' state='up'/>
  <vlan tag='180'>
    <interface name='ens3'/>

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?


Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
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