Open Stack

This doesn't really answer the question but KVM can be used to migrate a VM from one process to another on a single compute host. I wonder if this is what you are seeing.

Will

From: Abhishek Talwar [mailto:abhishek.talwar at tcs.com]
Sent: Tuesday, May 26, 2015 10:27 PM
To: Saju M
Cc: openstack-operators at lists.openstack.org
Subject: [Openstack-operators] #PERSONAL# Re: Can single node devstack OpenStack installation have VM migration

Hi Saju,

It is on KVM. I had tried on setting up a multinode environment with a controller, network and 2 compute nodes. But I am facing issues in that. Actually, one of the compute's is able to boot a VM and the VM goes to Active state. While on the other when I try to boot a VM it stay in scheduling state only. Also if I try to migrate the Active VM from 1 compute to other it gives me an error and the VM is left in error state.

So I thought of trying it on single-node kilo openstack, where I noticed that we have only 1 compute host in single-node setups but then also the VM gets migrated. So my question was where does the VM gets migrated when we don't have another compute host.

Regards
Abhishek

-----Saju M <sajuptpm at gmail.com<mailto:sajuptpm at gmail.com>> wrote: -----
To: Abhishek Talwar <abhishek.talwar at tcs.com<mailto:abhishek.talwar at tcs.com>>
From: Saju M <sajuptpm at gmail.com<mailto:sajuptpm at gmail.com>>
Date: 05/27/2015 10:43AM
Cc: openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>, "Kris G. Lindgren" <klindgren at godaddy.com<mailto:klindgren at godaddy.com>>, David Medberry <openstack at medberry.net<mailto:openstack at medberry.net>>
Subject: Re: [Openstack-operators] Can single node devstack OpenStack installation have VM migration

Hi Abhishek,
Anyway, You are planning to work on VM migration. So it is better to setup multinode environment. Where is your single node setup ? Is it on KVM or Virtualbox VM?
On May 27, 2015 10:33 AM, "Abhishek Talwar" <abhishek.talwar at tcs.com<mailto:abhishek.talwar at tcs.com>> wrote:
Hi,

But this link talks about only resizing in single node. I was talking about VM migration in single node ?

So how does this relates to VM migration ?

-----medberry at gmail.com<mailto:medberry at gmail.com> wrote: -----
To: "Kris G. Lindgren" <klindgren at godaddy.com<mailto:klindgren at godaddy.com>>
From: David Medberry
Sent by: medberry at gmail.com<mailto:medberry at gmail.com>
Date: 05/27/2015 10:22AM
Cc: Abhishek Talwar <abhishek.talwar at tcs.com<mailto:abhishek.talwar at tcs.com>>, "openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>" <openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>>
Subject: Re: [Openstack-operators] Can single node devstack OpenStack installation have VM migration
Good info Kris. I've never used/modified that setting. I learn something (lots actually) every day.

On Tue, May 26, 2015 at 10:19 AM, Kris G. Lindgren <klindgren at godaddy.com<mailto:klindgren at godaddy.com>> wrote:
I belive this can be possible by setting the allow_resize_same_host.  More details can be found here: http://www.madorn.com/resize-on-single-compute.html .  I believe the issue Dave is talking about is specifically targeting the same host for resize assuming the host can support it in a milti-node setup.  As getting the scheduler to choose the current host in the multihost setup is 95  percent of the battle.

-------- Original message --------
From: David Medberry <openstack at medberry.net<mailto:openstack at medberry.net>>
Date: 05/26/2015 4:36 AM (GMT-08:00)
To: Abhishek Talwar <abhishek.talwar at tcs.com<mailto:abhishek.talwar at tcs.com>>
Cc: openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>
Subject: Re: [Openstack-operators] Can single node devstack OpenStack installation have VM migration
No. Providing a mechanism for this is discussed from time to time, but it is not currently available.

All


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