libvirt users - Dec 2013 - internal error: unexcepted domain type lxc, excepted one of these: qemu, kqemu, kvm, xen

Hi,

I'm not able to create lxc domains anymore with libvirt 1.2.0-1.

The current arch linux package is affected by this bug:
https://bugs.archlinux.org/task/38007).


vm.xml:

<domain type="lxc">
<name>test</name>
<memory unit="GiB">2</memory>
<os>
<type>exe</type>
<init>/sbin/init</init>
</os>
<devices>
<filesystem type="mount">
<source dir="/var/lib/libvirt/filesysystems/test"/>
<target dir="/"/>
</filesystem>
<interface type="network">
<source network="default"/>
</interface>
<console type="pty"/>
</devices>
</domain>



# virsh create vm.xml
error: Failed to create domain from vm.xml
error: internal error: unexcepted domain type lxc, excepted one of
these: qemu, kqemu, kvm, xen


However, ./configure reports that LXC support is compiled in:

configure: Drivers
configure:
configure: Xen: no
configure: QEMU: yes
configure: UML: yes
configure: OpenVZ: yes
configure: VMware: yes
configure: VBox: yes
configure: XenAPI: no
configure: xenlight: no
configure: LXC: yes
configure: PHYP: yes
configure: ESX: yes
configure: Hyper-V: no
configure: Parallels: no
configure: Test: yes
configure: Remote: yes
configure: Network: yes
configure: Libvirtd: yes
configure: Interface: yes
configure: macvtap: yes
configure: virtport: yes
configure:
configure: Storage Drivers
configure:
configure: Dir: yes
configure: FS: yes
configure: NetFS: yes
configure: LVM: yes
configure: iSCSI: no
configure: SCSI: yes
configure: mpath: yes
configure: Disk: yes
configure: RBD: no
configure: Sheepdog: no
configure: Gluster: no


Do you have any idea why it does not work anymore? I don't see any new
changes in src/conf/domain_conf.c where the error is thrown (line 10960)
on current git HEAD...


Florian

On 12/11/2013 11:56 AM, Florian Klink wrote:
> Hi,
> 
> I'm not able to create lxc domains anymore with libvirt 1.2.0-1.
> 
> 
> 
> # virsh create vm.xml
What does 'virsh uri' output?  My guess is that your older version of
libvirt was built with JUST lxc support, and that your new version has
BOTH lxc and qemu support.  By not specifying an explicit connection,
you are probably defaulting to qemu, which explains the failure.  If I'm
right, then

# virsh -c lxc:/// create vm.xml

will resolve your situation (you can also set environment variables so
that you don't have to always remember the -c option).
> 
> However, ./configure reports that LXC support is compiled in:
> 
> configure: Drivers
> configure:
> configure: Xen: no
> configure: QEMU: yes
Yes, but it also reports that qemu is compiled in, and we don't have any
hard-and-fast rules about which URI is tried first if you don't specify
an explicit URI with the -c option.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

Am 11.12.2013 20:56, schrieb Eric Blake:
> On 12/11/2013 11:56 AM, Florian Klink wrote:
>> Hi,
>>
>> I'm not able to create lxc domains anymore with libvirt 1.2.0-1.
>>
> 
>>
>>
>> # virsh create vm.xml
> 
> What does 'virsh uri' output?  My guess is that your older version
of
> libvirt was built with JUST lxc support, and that your new version has
> BOTH lxc and qemu support.  By not specifying an explicit connection,
> you are probably defaulting to qemu, which explains the failure.  If
I'm
> right, then
> 
> # virsh -c lxc:/// create vm.xml
> 
> will resolve your situation (you can also set environment variables so
> that you don't have to always remember the -c option).
You were right. Setting the connection to lxc:/// fixed the problem.
Thanks :-)

Florian