[Openstack] Migrate instances/tenants between clouds

Joshua Harlow harlowja at yahoo-inc.com
Fri Oct 25 17:18:45 UTC 2013

Hi alex,

I know that different situations calls for different measures and I
understand the reason.

Y! is moving from nova-network to quantum (in-place) so I know its
possible, but yes it requires pretty deep understanding of nova, quantum,

Of course not everyone has the resources or expertise to do this; which to
me is the void the community should be filling with tutorials,

So I feel your pain! :)

On 10/25/13 1:56 AM, "Alexander Stellwag" <openstack at stellwag.net> wrote:

>On 24.10.2013 21:48, Joshua Harlow wrote:
>> Whatever happened to doing in-place upgrades?
>> Has that been problematic for u, are people just not doing it? If
>> they are avoiding it, why?
>If it was possible for us, then I would be the first to do it.
>Unfortunately it's not that easy because we're also changing the
>complete infrastructure (most notably going from nova-network to
>> Shouldn't just going from folsom->havana work, if not, why not; it
>> worries me that this isn't priority #0 if it doesn't work.
>It works as long as you stick with your old network layout. I do
>sincerly hope that this is the only migration we must to "the hard way".
>> On 10/24/13 10:51 AM, "Tim Bell" <Tim.Bell at cern.ch> wrote:
>>> 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
>>> 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.
>>> Tim
>>>> -----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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>Alexander Stellwag
>Deutsche Telekom AG Products & Innovation
>Infrastructure Design

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