libvirt users - Mar 2014 - libvirtError: this function is not supported by the connection driver: virInterfaceDefineXML

Hi,
Could anyone help I'm getting the following error when I tried to add a new
network interface.

DETAILS


Connection
---------------------------
import libvirt
conn = libvirt.open('qemu:///system')

Interface XML
----------------------

<interface type="bridge" name="br0">
  <start mode="onboot"/>
  <mtu size="1500"/>
  <protocol family="ipv4">
    <dhcp/>
  </protocol>
  <bridge stp="off" delay="0.01">
    <interface type="ethernet" name="eth0">
      <mac address="ab:bb:cc:dd:ee:ff"/>
    </interface>
    <interface type="ethernet" name="eth1"/>
  </bridge>
</interface>





In [96]:

conn.interfaceDefineXML(interfacexml,0)

---------------------------------------------------------------------------libvirtError
                             Traceback (most recent call
last)/home/saju/<ipython-input-96-0536ffe3fa23> in
<module>()----> 1
conn.interfaceDefineXML(br1xml,0)
/usr/lib/python2.7/dist-packages/libvirt.pyc in
interfaceDefineXML(self, xml, flags)   2750         libvirtd. """
2751         ret = libvirtmod.virInterfaceDefineXML(self._o, xml,
flags)-> 2752         if ret is None:raise
libvirtError('virInterfaceDefineXML() failed', conn=self)   2753
  __tmp = virInterface(self, _obj=ret)   2754         return __tmp
libvirtError: this function is not supported by the connection driver:
virInterfaceDefineXML





Regards
Sijo Jose

On 12.03.2014 14:41, Sijo Jose wrote:
>
>
>
> Hi,
> Could anyone help I'm getting the following error when I tried to add a
> new network interface.
>
> DETAILS
>
>
> Connection
> ---------------------------
> import libvirt
> conn = libvirt.open('qemu:///system')
>
> Interface XML
> ----------------------
>
> <interface type="bridge" name="br0">
>    <start mode="onboot"/>
>    <mtu size="1500"/>
>    <protocol family="ipv4">
>      <dhcp/>
>    </protocol>
>    <bridge stp="off" delay="0.01">
>      <interface type="ethernet" name="eth0">
>        <mac address="ab:bb:cc:dd:ee:ff"/>
>      </interface>
>      <interface type="ethernet" name="eth1"/>
>    </bridge>
> </interface>
>
>
>
>
>
> In [96]:
>
> conn.interfaceDefineXML(interfacexml,0)
>
> ---------------------------------------------------------------------------
> libvirtError                               Traceback (most recent call
last)
> /home/saju/<ipython-input-96-0536ffe3fa23>  in<module>()
> ----> 1  conn.interfaceDefineXML(br1xml,0)
>
> /usr/lib/python2.7/dist-packages/libvirt.pyc  ininterfaceDefineXML(self,
xml, flags)
>     2750          libvirtd. """
>     2751          ret=  libvirtmod.virInterfaceDefineXML(self._o,  xml, 
flags)
> -> 2752          if  retis  None:raise 
libvirtError('virInterfaceDefineXML() failed',  conn=self)
>     2753          __tmp=  virInterface(self,  _obj=ret)
>     2754          return  __tmp
>
> libvirtError: this function is not supported by the connection driver:
virInterfaceDefineXML
>
That's because you've libvirt compiled with udev rather than netcf. The 
netcf is the only one backend that knows how to create a new interface.

Install netcf and rebuild libvirt and you should be able to create 
interfaces via libvirt.

Michal

Thanks, let me see it


On Wed, Mar 12, 2014 at 8:01 PM, Michal Privoznik
<mprivozn@redhat.com>wrote:
> On 12.03.2014 14:41, Sijo Jose wrote:
>
>>
>>
>>
>> Hi,
>> Could anyone help I'm getting the following error when I tried to
add a
>> new network interface.
>>
>> DETAILS
>>
>>
>> Connection
>> ---------------------------
>> import libvirt
>> conn = libvirt.open('qemu:///system')
>>
>> Interface XML
>> ----------------------
>>
>> <interface type="bridge" name="br0">
>>    <start mode="onboot"/>
>>    <mtu size="1500"/>
>>    <protocol family="ipv4">
>>      <dhcp/>
>>    </protocol>
>>    <bridge stp="off" delay="0.01">
>>      <interface type="ethernet" name="eth0">
>>        <mac address="ab:bb:cc:dd:ee:ff"/>
>>      </interface>
>>      <interface type="ethernet" name="eth1"/>
>>    </bridge>
>> </interface>
>>
>>
>>
>>
>>
>> In [96]:
>>
>> conn.interfaceDefineXML(interfacexml,0)
>>
>> ------------------------------------------------------------
>> ---------------
>> libvirtError                               Traceback (most recent call
>> last)
>> /home/saju/<ipython-input-96-0536ffe3fa23>  in<module>()
>> ----> 1  conn.interfaceDefineXML(br1xml,0)
>>
>> /usr/lib/python2.7/dist-packages/libvirt.pyc 
ininterfaceDefineXML(self,
>> xml, flags)
>>     2750          libvirtd. """
>>     2751          ret=  libvirtmod.virInterfaceDefineXML(self._o,  xml,
>>  flags)
>> -> 2752          if  retis  None:raise 
libvirtError('virInterfaceDefineXML()
>> failed',  conn=self)
>>     2753          __tmp=  virInterface(self,  _obj=ret)
>>
>>     2754          return  __tmp
>>
>> libvirtError: this function is not supported by the connection driver:
>> virInterfaceDefineXML
>>
>>
> That's because you've libvirt compiled with udev rather than netcf.
The
> netcf is the only one backend that knows how to create a new interface.
>
> Install netcf and rebuild libvirt and you should be able to create
> interfaces via libvirt.
>
> Michal
>