[Openstack] Migrate instances/tenants between clouds

Tim Bell Tim.Bell at cern.ch
Thu Oct 24 17:51:45 UTC 2013

Have you tried

- snapshot
- glance download of the snapshot
- glance upload of the snapshot to new instance
- boot from snapshot

The process we use at CERN is documented at http://information-technology.web.cern.ch/book/cern-cloud-infrastructure-user-guide/images/migrating-using-images

This could be a good technique to document in the standard CERN openstack user guide.

BTW, this does increase the storage in your glance server since you'll loose any commonality between multiple images. So, make sure you've lots of space on Glance.


> -----Original Message-----
> From: Alexander Stellwag [mailto:openstack at stellwag.net]
> Sent: 24 October 2013 16:53
> To: openstack at lists.openstack.org
> Subject: [Openstack] Migrate instances/tenants between clouds
> Hi stackers,
> we're looking for a tool / script / blueprint to migrate instances or even complete tenants between multiple installations of OpenStack
> (possibly running different versions).
> I searched around the net but didn't find anything appropriate. Is any of you aware of such a tool?
> The current use-case is a migration from a folsom/nova-network based installation into our new havana/neutron based cloud. It is not
> necessary to migrate instances and volumes online but it should work at least semi-automatically to make it usable in large deployments.
> Any hints would be greatly appreciated.
> Cheers,
> Alex
> --
> Alexander Stellwag
> Deutsche Telekom AG Products & Innovation Infrastructure Design

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