Hello Matt,

On 2019/03/22 23:57, Matt Riedemann wrote:> On 3/22/2019 4:23 AM, Rikimaru Honjo wrote:

...

I think that the root cause is that the LXDLiveMigrateData object is not registered with nova-condcutor & compute.

Correct. The nova-powervm driver had the same issue before Ocata and it was dealt with in the out-of-tree driver code to register their migrate data object:

https://github.com/openstack/nova-powervm/tree/newton-eol/nova_powervm/objec...

I don't see anything like that in the nova-lxd code. But then again I'm not a nova-lxd developer so I don't know how they make live migration work.

Thank you for suggesting! I think that Nova-lxd driver can also be dealt in the same way.

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@po.ntt-tx.co.jp> wrote:

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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".

https://github.com/openstack/nova-powervm/blob/newton-eol/README.rst#live-mi...

I think that it is troublesome for users...

Current PowerVMLiveMigrateData was moved to nova tree in the following patch. https://review.openstack.org/#/c/391284/

Best regards,

Thanks Alex.

...

Best regards,

_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Rikimaru Honjo E-mail:honjo.rikimaru@po.ntt-tx.co.jp