Open Stack

On 02/07/2013 06:48 AM, Shyam Goud wrote:
> Hello,
>
> I have a VM Instacne (ServerA) running on KVM hypervisor, I want to Launch the same VM in Openstack by adding its disk image to glance.
>
> Followed these steps:
>
> 1. Copied (ServerA) VM disk image to my openstack server. Image type shows as qcow2.
>
> /root at oscontroller-desktop:/home/os-controller# qemu-img info disk//
> //image: disk//
> //file format: //*qcow2*//
> //virtual size: 10G (10737418240 bytes)//
> //disk size: 9.8G//
> //cluster_size: 2097152//
> //backing file: /var/lib/nova/instances/_base/902ba3cda1883801594b6e1b452790cc53948fda//
> /
> 2. And added disk image to glance,
>
> /root at oscontroller-desktop:/home/os-controller# glance image-list
> +--------------------------------------+-------------------------+-------------+------------------+-------------+--------+
> | ID                                   | Name | Disk Format | Container Format | Size        | Status |
> +--------------------------------------+-------------------------+-------------+------------------+-------------+--------+
> | 1214e050-5445-49af-a35f-0f01071ae83f | ubuntu-precise-21012013 | qcow2       | bare             | 250019840   | active |
> | 2f9dfb90-6a1f-4226-8cac-d85d4f6b2258 | jenkins-disk-img | qcow2       | bare             | 10546577408 | active |/
>
> 3. But While Launching the VM in Openstack, State goes to Error.
>
>  From nova-compute logs, i see the image is unacceptable Error. Do i need convert the KVM VM image to different type ? Plz let me know is there any other ways of doing it.
>
> ++++++++++++++++++++
> /2013-02-06 21:29:50 TRACE nova.compute.manager [instance: 8ac2b752-cc56-4ee6-9247-5a19f5308c3c]     reason=_("fmt=%(fmt)s backed by: %(backing_file)s") % locals())
> 2013-02-06 21:29:50 TRACE nova.compute.manager [instance: 8ac2b752-cc56-4ee6-9247-5a19f5308c3c] *ImageUnacceptable: Image 2f9dfb90-6a1f-4226-8cac-d85d4f6b2258 is unacceptable: fmt=qcow2 backed by: /var/lib/nova/instances/_base/902ba3cda1883801594b6e1b452790cc53948fda*
> 2013-02-06 21:29:50 TRACE nova.compute.manager [instance: 8ac2b752-cc56-4ee6-9247-5a19f5308c3c]
> 2013-02-06 21:29:50 DEBUG nova.utils [req-9c89ddb8-d71a-4d6f-b195-5deea24c7c92 584093aecc7c433985029b31e4d480f9 5e2050ba95674ddfaa9e286d0e481830] Got semaphore "compute_resources" for method "abort_resource_claim"... from (pid=13756) inner /usr/lib/python2.7/dist-packages/nova/utils.py:713/
> ++++++++++++++++++++

The reason is that the image isn't complete and needs a backing file.
We disallow these explicitly for security reasons (consider a backing
file reference to the host disk).

So to create a compatible image I suggest, before importing to glance,
use qemu-img convert to merge the backing file like:

qemu-img convert -f qcow2 -O qcow2 disk newdisk

thanks,
Pádraig.