openstack team mailing list archive

[Vishvananda Ishaya <vishvananda@xxxxxxxxx>]

I don't know if anyone has started work on this feature.  Someone should file a blueprint.

Vish

On May 10, 2011, at 3:35 AM, Mikhail Shcherbakov wrote:

> Hi,
> Is there any progress on KVM block migration?
> 
> I'd like to test it and possibly make some changes to nova to support block devices,
> but don't want to reinventing the wheel.
> 
> Thanks,
> 
> 2011/4/12 Masanori ITOH <itoumsn@xxxxxxxxxxxxx>
> 
> Hi,
> 
> Vish also mentioned that we should support the KVM block migration feature
> instead of stability which I mentioned because it's very much useful.
> I agree with Vish of course. :)
> Actually, we discussed inclusion of block migration feature at San Antonio. :)
> 
> 
> I've also seen the page Hisaki mentioned. My point is that
> the page explains interacting qemu monitor but we need to invoke
> the feature through libvirt layer not the qemu monitor directly.
> Here, A colleague of mine mentioned that --copy-storage-all option of
> virsh looked like not-supported yet in Ubuntu 10.10 at least.
> 
> Hisaki,
> do you have any information if it's enabled in Ubuntu 11.04 libvirt?
> I mean using virsh, did you succeed invoking block live migration
> something like the following?
> 
>  $ virsh migrate --live --copy-storage-all DOMID DESTURL
> 
> Unfortunately, we haven't been able to make enough time trying Natty alpha
> because of our schedule delay caused by the earthquake in Northeastern Japan. :(
> At least, libvirt(virsh) included in RHEL6 does not support the feature.
> 
> But, anyway I will talk about the issue with Kei and Muneyuki before going to
> the Design Summit. :)
> 
> Regards,
> Masanori
> 
> 
> From: igoigo246 <igoigo246@xxxxxxxxx>
> Subject: Re: [Openstack] KVM Block Migration
> Date: Tue, 12 Apr 2011 09:28:38 +0900
> 
> > Hi,
> >
> > I look Japanease Site.
> > http://www.cuspy.org/blog/archives/917
> >
> > This site wrote.
> >
> > image file
> > vda.qcow
> >
> > sending host
> >
> > qemu --enable-kvm -m 512 \
> > -drive file=vda.qcow,if=virtio,boot=on \
> > -net nic,macaddr=00:16:3E:00:FF:32,model=virtio
> >
> > receive host
> >
> > touch vda.qcow
> > qemu -enable-kvm -m 512 \
> > -drive file=vda.qcow,if=virtio \
> > -net nic,macaddr=00:16:3E:00:FF:32,model=virtio \
> > -incoming tcp:0:4444
> >
> > sending host
> >
> > migrate -d -b tcp:wasabi:4444
> >
> >
> > (qemu) info migrate
> > Migration status: active
> > transferred ram: 48 kbytes
> > remaining ram: 147792 kbytes
> > total ram: 147840 kbytes
> > transferred disk: 206848 kbytes
> > remaining disk: 10278912 kbytes
> > total disk: 10485760 kbytes
> >
> > Thanks,
> >
> > --
> > Hisashi Ikari
> >
> >
> >
> >
> >
> > 2011-04-11 (月) の 16:50 +0900 に Masanori ITOH さんは書きました:
> > > Hi,
> > >
> > > We are considering if it's possible to support KVM block migration
> > > as the next step of live migration.
> > >
> > > Actually, our main issue at this moment is if that kvm feature is enough
> > > stable or not because we got several errors during our try of it
> > > using Ubuntu 10.10 code base. Especially, I'm not sure if the feature
> > > is enabled or not in the qemu-kvm bundled in Ubuntu/RHEL.
> > >
> > > Do you have any information about stability?
> > >
> > > Thanks,
> > > Masanori
> > >
> > > ---
> > > Masanori ITOH  R&D Headquarters, NTT DATA CORPORATION
> > >                e-mail: itoumsn@xxxxxxxxxxxxx
> > >
> > > From: igoigo246 <igoigo246@xxxxxxxxx>
> > > Subject: [Openstack] (no subject)
> > > Date: Mon, 11 Apr 2011 14:41:20 +0900
> > >
> > > > hi all
> > > >
> > > > KVM Block Migration is wonderful function.
> > > >
> > > > http://www.linux-kvm.com/content/qemu-kvm-012-adds-block-migration-feature
> > > >
> > > > this allow   that live migration do  without shared storage.
> > > >
> > > >
> > > > When KVM Block migration Support ?
> > > >
> > > >
> > > > Thanks for reading.
> > > > --
> > > > Hisashi Ikari
> > > >
> > > >
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> >
> 
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> 
> 
> -- 
> Mike Scherbakov
> www.mirantis.com
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