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On Wed, Dec 12, 2012 at 3:49 PM, Phillip Pao <paophillip at gmail.com> wrote:

> +1
>
> "it would be nice for cinder to have a concept of a read-only volume that
> could be attached to multiple instances"
>
> On Tue, Dec 11, 2012 at 1:00 PM, Vishvananda Ishaya <vishvananda at gmail.com
> > wrote:
>
>> Ultimately it would be nice for cinder to have a concept of a read-only
>> volume that could be attached to multiple instances, but in this case I
>> think it is a bug. The whole point of reserving the volume in cinder is so
>> that this cannot happen. Reserving should be atomic and cinder should
>> reject the reserve if it is already reserved.
>>
>> Vish
>>
>> On Dec 11, 2012, at 11:19 AM, "Karajgi, Rohit" <Rohit.Karajgi at nttdata.com>
>> wrote:
>>
>> Hi,****
>> ** **
>> I would like to get opinions on whether we should allow multiple
>> instances to be booted from a single volume.****
>> ** **
>> This is incorrectly allowed currently, the same volume seems to get
>> attached to each instance and the instances boot to Active status.****
>> More details can be seen in description of the bug
>> https://bugs.launchpad.net/nova/+bug/1087253.****
>> ** **
>> Ideally, the best way to achieve this would be pass a list of block
>> device mappings equal to the number of instances requested,****
>> changes going in to the Nova API code.****
>> Is it more feasible to restrict more than one instance to be passed with
>> a single block device mapping, or accept a list of BDMs?****
>> ** **
>> Regards,****
>> Rohit****
>> ** **
>>
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> Read only volumes is something we talked about at the last Summit, I'm
hoping to have it early in G3.  Still needs a BP etc.

John
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