openstack team mailing list archive

[Vishvananda Ishaya <vishvananda@xxxxxxxxx>]

I assigned it to milestone 2 since there are already a lot of changes we are trying to get in in milestone 1

Vish

On May 10, 2011, at 11:37 PM, Masanori ITOH wrote:

> Hi Mikhail, Vish, Kei,
> 
> I filed the blueprint below.
> 
>  https://blueprints.launchpad.net/nova/+spec/kvm-block-migration
> 
> and, please check the full specification page too.
> 
>  http://etherpad.openstack.org/kvm-block-migration
> 
> 
> BTW, who is the appropriate person as the approver?
> Also, I'm wondering which milestone target we should shoot for..
> diablo-1 or diablo-2?
> 
> Regards,
> Masanori
> 
> From: Vishvananda Ishaya <vishvananda@xxxxxxxxx>
> Subject: Re: [Openstack] KVM Block Migration
> Date: Wed, 11 May 2011 03:57:47 +0900
> 
>> 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<mailto: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<mailto: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<mailto:itoumsn@xxxxxxxxxxxxx>
>>>> 
>>>> From: igoigo246 <igoigo246@xxxxxxxxx<mailto: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<http://www.mirantis.com/>
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> 
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