[dev][nova-lxd]Can you do live-migration with nova-lxd?

Rikimaru Honjo honjo.rikimaru at po.ntt-tx.co.jp
Thu Mar 28 07:23:35 UTC 2019

Hello Alex,

On 2019/03/27 0:33, Alex Kavanagh wrote:
> Hi
> On Fri, Mar 22, 2019 at 9:25 AM Rikimaru Honjo <
> honjo.rikimaru at po.ntt-tx.co.jp> wrote:
>> Hello,
>> I'm using the nova-lxd with the latest nova.
>> In my understanding, nova-lxd already supports live-migration. But,it
>> didn't work
>> when I tried it. Is there anyone who can do live-migration with nova-lxd?
> I'm currently one of the maintainers of nova-lxd and I don't think that it
> supports live migration.  I'm fairly certain migration is broken (
> https://bugs.launchpad.net/nova-lxd/+bug/1818078) as it didn't work for me
> when I was testing.  Live migration appears to be disabled in the tempest
> testing (legacy-tempest-dsvm-lxd-ovs test):
> setUpClass
> (tempest.api.compute.admin.test_live_migration.LiveMigrationTest) ...
> SKIPPED: LiveMigrationTest skipped as live-migration is not available
OK, I see.

>> I think that the root cause is that the LXDLiveMigrateData object is not
>> registered with nova-condcutor & compute.
> I say "don't think it supports live migration" because I became a
> maintainer after that functionality appeared to be implemented; but I'm not
> entirely sure the work is complete (i.e. it returns an object that doesn't
> function with Nova as your mail indicates).  Whether it's because nova
> changed and nova-lxd didn't notice (quite likely!) or it never worked
> properly, I don't know, sadly.
>> I wrote more information as a comment#2 in the following bug report.
>> https://bugs.launchpad.net/nova-lxd/+bug/1711568
> Thanks, I'll reference it in the bug I raised, too.  In terms of getting it
> sorted out, it's not going to happen before the stein release, but I do
> want to get to it at the beginning of the next cycle.
Thanks a lot.

By the way, I confirmed the detail of the solution provided by Matt after that.
As a result, I found that the solution requires a special nova-conductor process "nova-conductor-powervm".


I think that it is troublesome for users...

Current PowerVMLiveMigrateData was moved to nova tree in the following patch.

Best regards,

> Thanks
> Alex.
>> Best regards,
>> --
>> _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
>> Rikimaru Honjo
>> E-mail:honjo.rikimaru at po.ntt-tx.co.jp


IoTイノベーション事業部 第二ビジネスユニット(IV2BU)
TEL.  :045-212-7539
E-mail:honjo.rikimaru at po.ntt-tx.co.jp
   横浜アイマークプレイス 13階

More information about the openstack-discuss mailing list