Open Stack

> -----Original Message-----
> From: Murray, Paul (HP Cloud) [mailto:pmurray at hpe.com]
> Sent: Wednesday, September 30, 2015 1:25 PM
> To: OpenStack Development Mailing List (not for usage questions)
> Subject: Re: [openstack-dev] [nova] live migration in Mitaka
>
>
> > Please respond to this post if you have an interest in this and what you
> would like to see done.
> > Include anything you are already getting on with so we get a clear 
> > picture.
>
> Thank you to those who replied to this thread. I have used the contents to
> start an etherpad page here:
>
> https://etherpad.openstack.org/p/mitaka-live-migration
>
> I have taken the liberty of listing those that responded to the thread and

> the
> authors of mentioned patches as interested people.
>
> From the responses and looking at the specs up for review it looks like 
> there
> are about five areas that could be addressed in Mitaka and several others
> that could come later. The first five are:
>
> - migrating instances with a mix of local disks and cinder volumes

Preliminary patch is up for review [1], we need to switch it to libvirt's v3

migrate API.

> - pause instance during migration
> - cancel migration
> - migrate suspended instances

I'm not sure I understand this correctly. When user calls 'nova suspend' I 
thought that it actually "hibernates" VM and saves memory state to disk 
[2][3]. In such case there is nothing to "live" migrate - shouldn't 
cold-migration/resize solve this problem?

> - improve CI coverage
>
> Not all of these are covered by specs yet and all the existing specs need
> reviews. Please look at the etherpad and see if there is anything you
think 
> is
> missing.

Paul, thanks for taking care of this. I've added missing spec to force live 
migration to finish [4].

Hope we manage to discuss all these items in Tokyo.

[1] https://review.openstack.org/#/c/227278/
[2] 
https://github.com/openstack/nova/blob/e31d1e11bd42bcfbd7b2c3d732d184a367b75
d6f/nova/virt/libvirt/driver.py#L2311
[3] 
https://github.com/openstack/nova/blob/e31d1e11bd42bcfbd7b2c3d732d184a367b75
d6f/nova/virt/libvirt/guest.py#L308
[4] https://review.openstack.org/#/c/229040/

Kind Regards,
Pawel Koniszewski
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