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#openstack-nova - 2018-07-25
09:01:11 cdent And bugs are _good_. They give people a clear way to contribute.
09:02:03 gibi cdent: I thikn _these_ possible bugs will give a clear message for new contributors not to touch nova ;)
09:02:41 cdent I don't know, I think we misunderstand the mechanics of why people choose or choose not to contribute
09:02:59 cdent So often with nova if you want to contribute you have to spend 4 years understanding things
09:03:09 cdent there are few easy entries
09:03:23 cdent plenty of people are using nova because they have to and would like to be able to make it better
09:03:58 cdent but are put off
09:04:00 gibi cdent: you are right, I should not generalize to all new contributors as I don't know their motives.
09:04:59 gibi cdent: what I wanted to say that I think these bugs will be scary even for me after 4 years of nova
09:05:10 cdent :)
09:05:37 cdent It's easier to fix them after they happen then it is easy to guess when they might happen?
09:07:33 gibi cdent: yeah I agree about cost of guessing is bigger. But I also don't know the seriosuness of the effect of these unknown bugs on a live deployment
09:09:18 gibi cdent: anyhow I think I hear you and understand you to move forward with the happy path
09:09:24 gibi cdent: and I think that is reasonable
09:40:44 openstackgerrit sean mooney proposed openstack/os-vif master: add fuctional test for os-vif init https://review.openstack.org/585693
09:41:20 openstackgerrit Rajesh Tailor proposed openstack/nova stable/queens: Make host_aggregate_map dictionary case-insensitive https://review.openstack.org/585334
09:43:41 openstackgerrit Rajesh Tailor proposed openstack/nova stable/pike: Make host_aggregate_map dictionary case-insensitive https://review.openstack.org/585335
09:45:55 sean-k-mooney mriedem: melwitt i have added a fuctionl test https://review.openstack.org/#/c/585693/ to try and reproduce the error in https://bit.ly/2v0ueZp but at least locally it looks like it should work as is.
09:46:00 openstackgerrit Rajesh Tailor proposed openstack/nova master: Fix case-sensitivity for metadata keys https://review.openstack.org/504885
10:30:25 openstackgerrit Lenny Verkhovsky proposed openstack/nova master: WIP workaround for RHEL7.5 qemu 2.0 https://review.openstack.org/577280
10:37:36 openstackgerrit Balazs Gibizer proposed openstack/nova master: Functional test for booting with nested resources https://review.openstack.org/527728
10:38:46 mdbooth kashyap: My +1 to sahid's suggestions was before the subsequent discussion. I'll defer to that discussion.
10:38:58 kashyap mdbooth: Hi
10:40:13 kashyap mdbooth: So, you mean: you are OK with moving to guest.migrate() can be done as a separate patch?
10:40:48 mdbooth kashyap: I think moving to guest.migrate() is better, but if you discussed that already and decided to put it in a later change I'm ok with that.
10:41:01 kashyap mdbooth: Yeah, we discussed it, and will do it later
10:41:11 kashyap As I am dealing with too much churn in this change
10:41:15 mdbooth kashyap: That is, I don't mind what colour you paint the bike shed :)
10:41:29 kashyap I'd like to get it done before I head out for 2 weeks starting 01-Aug
10:41:35 kashyap mdbooth: Hehe, nod
10:41:41 kashyap Thanks for looking, BTW!
10:42:24 kashyap mdbooth: About the "parallels" question: it seems alright to me, but I'll go over carefully again
10:43:00 mdbooth kashyap: Ack. Specifically, is it ok to call migrateToURI3() without that parameter?
10:43:11 mdbooth I don't know the answer, btw, just worth checking.
10:43:24 kashyap mdbooth: Without 'destination_xml', you mean?
10:43:32 kashyap Yeah, I'll see
10:45:14 kashyap mdbooth: Right now debugging the test failure from hell: nova.tests.unit.virt.test_virt_drivers.LibvirtConnTestCase.test_live_migration
10:45:39 kashyap Once I'm done w/ it, will look
10:50:23 kashyap stephenfin: LOL
10:50:41 kashyap I'm dealing with a bloody obtuse stubbing failure for 2 hours!
10:50:55 stephenfin kashyap: Try 3 days :(
10:50:59 kashyap The here is incredibly dense; sheesh
10:51:05 kashyap stephenfin: I lied to you
10:51:14 kashyap 2 hours only today
10:51:21 kashyap I spent yesterday & day before too
10:51:34 kashyap After all this debugging, realized the fix is "simple" :-(
10:51:59 mdbooth stephenfin: stub -> simulator. simulators are also really useful, just not as simple.
10:57:06 stephenfin mdbooth: I think that's what I'm writing. God damn neutron
11:01:14 kashyap mdbooth: Got a minute? Does this stub look OK to you:
11:01:15 kashyap 135 self.stub_out('nova.virt.libvirt.guest.Guest.migrate',
11:01:15 kashyap 136 lambda self, destination, migrate_uri=None,
11:01:15 kashyap 137 migrate_disks=None, destination_xml=None, flags=0,
11:01:18 kashyap 138 bandwidth: None)
11:01:24 kashyap (That's from nova/tests/unit/virt/test_virt_drivers.py)
11:02:45 mdbooth kashyap: No, because bandwidth doesn't have a default, and comes after args with defaults.
11:02:58 kashyap mdbooth: Ah
11:03:01 mdbooth Is there any other reason it might not be ok?
11:03:45 mdbooth kashyap: Also, you could probably just mock it.
11:03:51 kashyap mdbooth: What do I give 'bandwidth' then?
11:03:53 kashyap Hmm
11:04:07 mdbooth kashyap: Doesn't matter, because you're not going to use it anyway.
11:04:32 kashyap mdbooth: Ah, this works!
11:04:33 kashyap bandwith=0: None
11:04:42 mdbooth self.useFixture(fixtures.MockPatch('nova.virt.libvirt.guest.Guest', 'migrate'))
11:04:48 kashyap In summary:
11:04:49 kashyap self.stub_out('nova.virt.libvirt.guest.Guest.migrate',
11:04:51 kashyap lambda self, destination, migrate_uri=None,
11:04:51 kashyap migrate_disks=None, destination_xml=None, flags=0,
11:04:51 kashyap bandwidth=0: None)
11:04:51 kashyap mdbooth: How about the above?
11:04:52 mdbooth foo=^^^
11:04:57 mdbooth foo.return_value=None
11:05:16 mdbooth kashyap: Looks syntactically correct, at least.
11:05:40 kashyap Yeah, it is!
11:05:43 openstackgerrit Stephen Finucane proposed openstack/nova master: Assorted cleanups from numa-aware-vswitches series https://review.openstack.org/582651
11:05:44 kashyap And the test from hell passes!~
11:05:44 openstackgerrit Stephen Finucane proposed openstack/nova master: WIP: Add functional tests for rebuild with NUMA networks https://review.openstack.org/585385
11:06:20 mdbooth \o/
11:06:37 stephenfin mdbooth: If you have time, fancy taking a look at ^ to see if I'm missing anything really obvious?
11:06:51 stephenfin I'm seeing "AttributeError: 'module' object has no attribute 'vif'" but I've no idea why
11:06:54 sean-k-mooney stephenfin: i was just going to ask you about the functional tests
11:07:17 sean-k-mooney do you want me to pull them down and step through them more or did you get them to work?
11:07:25 stephenfin Thought it was a namespace conflict (mocking "objects" or something) but I renamed the import to no effect. Can't find any global mocks or anything
11:07:30 stephenfin sean-k-mooney: That'd be great
11:07:38 stephenfin I've got it to the point where it's attempting to plug
11:07:47 sean-k-mooney stephenfin: cool will do
11:07:54 stephenfin But the plug is failing with the above
11:08:03 stephenfin sean-k-mooney: Awesome. Thank you :)
12:10:52 openstackgerrit Neha Alhat proposed openstack/python-novaclient master: Enable split logging for cinder-novaclient interaction https://review.openstack.org/581218
12:22:58 openstackgerrit Jan Gutter proposed openstack/nova master: Use vif.vif_name in _set_config_VIFGeneric https://review.openstack.org/571461
12:29:34 mdbooth lyarwood: https://review.openstack.org/#/c/571410/7 Are we missing a simpler solution here?
12:29:59 mdbooth lyarwood: And another big race condition in a periodic, of course.
12:42:05 lyarwood mdbooth: erm I don't follow, the entire point of that conditional is to not fail, to not raise DiskNotFound?
12:42:39 mdbooth lyarwood: And my point is we're decided whether to fail or not based on data which is really out of date, and why would it ever be better to fail there anyway?
12:42:57 mdbooth lyarwood: i.e. just don't fail.
12:42:59 mdbooth ever.
12:43:54 stephenfin mriedem: FYI, I've got further with that functional test but I'm still seeing some issues (this time "AttributeError: 'module' object has no attribute 'vif'", where module is os_vif). Will keep working on it
12:44:34 lyarwood mdbooth: yeah I guess that's valid sorry, warning when it isn't found would be cleaner I guess
12:44:55 mriedem stephenfin: hmm, i think the FakeLibvirtFixture has a flag for stubbing out os-vif somehow
12:44:57 mriedem might want to check that out

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