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[Vishvananda Ishaya <vishvananda@xxxxxxxxx>]

NBD shouldn't be needed for xen.  You probably need to set
--nouse_cow_images
which will stop nova from trying to use qcow2 as the image format.

Vish

On Aug 16, 2011, at 11:06 AM, Joshua Harlow wrote:

> ctoteam@buildingbuild:~$ sudo modprobe nbd
> ctoteam@buildingbuild:~$ 
> 
> Is there supposed to be devices there??
> 
> On 8/15/11 10:23 PM, "Yuriy Taraday" <yorik.sar@xxxxxxxxx> wrote:
> 
> You probably should try to do "modprobe nbd" before running nova. This will create list of nbd devices that nova uses to inject keys and get images ready to start VM from them.
> 
> Kind regards, Yuriy.
> 
> 
> 
> On Tue, Aug 16, 2011 at 06:18, Joshua Harlow <harlowja@xxxxxxxxxxxxx> wrote:
> Hi all,
> 
> Another error that others may have seen:
> Is it supposed to continue even if this fails?
> This is for running xen btw (this is running on nova-compute in a xen dom0 instance).
> 
> ting data into image 3 (Unexpected error while running command.
> Command: sudo qemu-nbd -c /dev/nbd14 /home/ctoteam/nova/nova/..//instances/instance-0000000a/disk
> Exit code: 1
> Stdout: ''
> Stderr: "qemu-nbd: Could not access '/dev/nbd14': No such file or directory\n")
> libvir: Xen Daemon error : XML error: failed to parse domain description
> 2011-08-15 19:16:29,374 ERROR nova.exception [-] Uncaught exception
> (nova.exception): TRACE: Traceback (most recent call last):
> (nova.exception): TRACE:   File "/home/ctoteam/nova/nova/exception.py", line 97, in wrapped
> (nova.exception): TRACE:     return f(*args, **kw)
> (nova.exception): TRACE:   File "/home/ctoteam/nova/nova/virt/libvirt/connection.py", line 603, in spawn
> (nova.exception): TRACE:     domain = self._create_new_domain(xml)
> (nova.exception): TRACE:   File "/home/ctoteam/nova/nova/virt/libvirt/connection.py", line 1078, in _create_new_domain
> (nova.exception): TRACE:     domain = self._conn.defineXML(xml)
> (nova.exception): TRACE:   File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1869, in defineXML
> (nova.exception): TRACE:     if ret is None:raise libvirtError('virDomainDefineXML() failed', conn=self)
> (nova.exception): TRACE: libvirtError: XML error: failed to parse domain description
> (nova.exception): TRACE: 
> 2011-08-15 19:16:29,375 ERROR nova.compute.manager [-] Instance '10' failed to spawn. Is virtualization enabled in the BIOS? Details: XML error: failed to parse domain description
> (nova.compute.manager): TRACE: Traceback (most recent call last):
> (nova.compute.manager): TRACE:   File "/home/ctoteam/nova/nova/compute/manager.py", line 329, in _run_instance
> (nova.compute.manager): TRACE:     self.driver.spawn(instance, network_info, bd_mapping)
> (nova.compute.manager): TRACE:   File "/home/ctoteam/nova/nova/exception.py", line 124, in wrapped
> (nova.compute.manager): TRACE:     raise Error(str(e))
> (nova.compute.manager): TRACE: Error: XML error: failed to parse domain description
> (nova.compute.manager): TRACE: 
> libvir: Xen error : Domain not found: xenUnifiedDomainLookupByName
> 2011-08-15 19:16:51,893 INFO nova.compute.manager [-] Found instance 'instance-00000005' in DB but no VM. State=5 
> 
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