[openstack-dev] [Openstack] Some question about image provision in openstack

Clint Byrum clint at fewbar.com
Sat Dec 28 15:37:01 UTC 2013


Excerpts from Pengfei Zhang's message of 2013-12-25 21:47:29 -0800:
> Hi,
>      I come across two question about the image provision and distribute in openstack(nova),
> 1.Afaik, in current version, nova-compute use the curl to download image from glance (or other places). Are there any alternative methods to choose (such torrent)?

We've been looking into alternatives as part of the TripleO project to
deploy OpenStack on top of itself. Torrent-like methods do look
promising.

> 2.In fact, to boot a VM above hypervisor, there is no need to transfer the whole image-file to local. Will the mechanism to transfer the image on demand makes sense?
>

The simplest solution like that today that I know of is to put your
image storage in CEPH, setup Cinder to use CEPH, and then boot from
volume with thin provisioning. The image will never be "transferred",
the root volume will just always live on a writable CEPH snapshot.



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