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This was Newton booting from ephemeral disk.  There were no delete events in the nova api database, just an unexpected stop when the kernel oom killer got qemu.  


> On Mar 17, 2017, at 8:28 AM, Saverio Proto <zioproto at gmail.com> wrote:
> 
> Hello Mike,
> 
> what version of openstack ?
> is the instance booting from ephemeral disk or booting from cinder volume ?
> 
> When you boot from volume, that will be the root disk of your
> instance. The user could have clicked on "Delete Volume on Instance
> Delete". It can be selected when creating a new instance.
> 
> Saverio
> 
> 2017-03-13 15:47 GMT+01:00 Mike Lowe <jomlowe at iu.edu>:
>> Over the weekend a user reported that his instance was in a stopped state and could not be started, on further examination it appears that the vm had crashed and the strange thing is that the root disk is now gone.  Has anybody come across anything like this before?
>> 
>> And why on earth is it attempting deletion of the rbd device without deletion of the instance?
>> 
>> 2017-03-12 10:59:07.591 3010 WARNING nova.virt.libvirt.storage.rbd_utils [-] rbd remove 4367a2e4-d704-490d-b3a6-129b9465cd0d_disk in pool ephemeral-vms failed
>> 2017-03-12 10:59:17.613 3010 WARNING nova.virt.libvirt.storage.rbd_utils [-] rbd remove 4367a2e4-d704-490d-b3a6-129b9465cd0d_disk in pool ephemeral-vms failed
>> 2017-03-12 10:59:26.143 3010 WARNING nova.virt.libvirt.storage.rbd_utils [-] rbd remove 4367a2e4-d704-490d-b3a6-129b9465cd0d_disk in pool ephemeral-vms failed
>> _______________________________________________
>> OpenStack-operators mailing list
>> OpenStack-operators at lists.openstack.org
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>> 

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