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Same here ,when I do with 2 instances , the snapshot works fine. So there
is a bug somewhere. Can you(Lei) please update in this bug
https://bugs.launchpad.net/nova/+bug/1419734/ .

On Tue, Feb 10, 2015 at 10:05 AM, Lei Zhang <zhang.lei.fly at gmail.com> wrote:

> hi guys,
>
> I meet this issue today. I am testing on the ceph, too.
>
> If stopped the instance, the snapshot is created successfully.
> If there are at least two instances on the same compute node and make
> snapshot on the running vm. It will successfully, too. Because the bridge
> is not deleted due to another vm is using it.
>
> The root cause should just like @Vijaya Bhaskar saied
>
> >  The issue is that nova is trying to freeze the instance before
> snapshot(I think), but unable to resume the instance due to missing bridge
> , and the snapshot image is deleted automatically. However, the instances
> can suspend, soft reboot and hard reboot successfully.
>
> The fix i think should be check the bridge exist before resume the vm. If
> not, call the neutron to create it again.
>
> On Mon, Feb 9, 2015 at 10:25 PM, Jay Pipes <jaypipes at gmail.com> wrote:
>
>> On 02/08/2015 11:39 PM, Vijaya Bhaskar wrote:
>>
>>> Please guys,  Any ideas. I have not been able to fix the issue till now.
>>>
>>> On Fri, Feb 6, 2015 at 1:33 PM, Vijaya Bhaskar
>>> <vijayabhaskar at sparksupport.com <mailto:vijayabhaskar at sparksupport.com>>
>>> wrote:
>>>
>>>     Hi all,
>>>
>>>     I have an openstack setup with ceph as the storage backend and
>>>     linuxbridge plugin for networking. When I try to take a snapshot of
>>>     an instance that is running, the image is getting created, but it
>>>     gets deleted as soon as the creation starts. When I checked the nova
>>>     logs I found these:
>>>
>>
>> Does this happen if you stop the instance and then snapshot it?
>>
>> Best,
>> -jay
>>
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>
>
>
> --
> Lei Zhang
> Blog: http://xcodest.me
> twitter/weibo: @jeffrey4l
>
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-- 
Systems Engineer
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