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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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