Open Stack

Is this perhaps considered off-topic? If so, is there a better place to discuss future enhancements?


From: Shaheed Haque [mailto:shahhaqu at cisco.com]
Sent: 17 May 2014 20:12
To: openstack-dev at lists.openstack.org
Subject: A VM with multiple images that boot off a non-first image


Hi all,



I have the need to support a VM which (a) comprises multiple disk images, and (b) boots off a disk which is not the first disk. I've read the docs, played with:



nova boot --image (and also --ephemeral)



nova boot --block-device-mapping



nova boot --block-device and its boot_index



and I think that what I need is something like this:



nova boot --block-device=diskimage0,type=?? \

--block-device=diskimage1,type=?? \

--block-device=diskimage2,type=??,boot-index=0



On Havana h1 at least, all that seems to do is to rename the boot device from vda to vdc. I see several launchpad entries in this vague area, but am left wondering if this is beyond what is actually possible even in Icehouse (which I have not yet tried).



Any clues welcomed.



Thanks, Shaheed



P.S. AFAIK, I am not interested in anything which is volume-centric in the first instance, as I need the same images to be loaded by multiple instances.


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