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#openstack-nova - 2023-08-28
17:19:16 noonedeadpunk but that is really handy command I didn't know about
17:19:24 noonedeadpunk so thanks for pointing me to it!
17:19:28 sean-k-mooney its really ment for helping peopel upgrade
17:19:42 sean-k-mooney but it will update the ebeded image metadata
17:19:50 sean-k-mooney if its boot form volume
17:20:01 sean-k-mooney there is an other hack
17:20:31 sean-k-mooney tl;dr is using old micorvstion of the rebuild api
17:20:42 sean-k-mooney allow bfv guests to just update the image metadata
17:20:57 sean-k-mooney i.e. on microvsion where rebuild was not supproted for boot form volume
17:21:09 sean-k-mooney if you used the same image uuid we allowed the metadtaa to be updated
17:21:36 noonedeadpunk iirc rebuild is supported quite recently? like zed or 2023.1?
17:21:42 sean-k-mooney this is generally not that safe as it would break the vm in some caseses and in the new microvserion it will actully rebuild the volume
17:21:51 sean-k-mooney yes
17:22:30 noonedeadpunk ok, awesome, thanks a lot!
17:22:32 sean-k-mooney so preior to actully supproting it properly there was a poorly documented feature where rebuild to the same iamge "only for bfv guests" woudl not destory data and just update the metadata
17:22:50 sean-k-mooney but honestly htat should never have been a thing
17:23:11 sean-k-mooney we effectivly forgot it existed until we added real rebuild support
17:23:45 noonedeadpunk I can recall writing smth to the ML regarding that
17:25:24 noonedeadpunk but already forgot about this feature :D
17:27:35 sean-k-mooney having a behviaor for a normally distructive api not be only if its BFV is too easy to forget
#openstack-nova - 2023-08-29
06:44:50 dvo-plv sean-k-mooney, Hello
06:45:55 dvo-plv regarding our yesterday discussion. I see two options. we can get back to the separate mech driver, like was suggested year ago
06:46:37 dvo-plv or we can pass socket name + pci endpoint in some way
07:25:02 Uggla Hello Nova.
07:34:45 gibi Uggla: o/
08:24:42 opendevreview melanie witt proposed openstack/nova master: nova-manage: Add 'limits migrate_to_unified_limits' https://review.opendev.org/c/openstack/nova/+/891646
12:56:44 opendevreview Maksim Malchuk proposed openstack/nova stable/xena: Fix to implement 'pack' or 'spread' VM's NUMA cells https://review.opendev.org/c/openstack/nova/+/829804
14:47:28 opendevreview Dan Smith proposed openstack/nova master: WIP: Detach disks using alias when possible https://review.opendev.org/c/openstack/nova/+/893068
14:49:02 dansmith kashyap: was just going to point you at this, first PoC of using the stable alias to detach disks: https://review.opendev.org/c/openstack/nova/+/893068
14:49:19 dansmith seems to work, without having to muck with all the actual detach plumbing like I was originally thinking
14:49:33 dansmith I think something similar should work for interfaces too
14:49:59 dansmith there's a lot more looking-up-of-devices elsewhere that would need to change, but I'm hoping those places will be able to use that helper too
14:50:55 opendevreview Elod Illes proposed openstack/nova stable/yoga: Don't provide MTU value in metadata service if DHCP is enabled https://review.opendev.org/c/openstack/nova/+/879701
14:50:56 kashyap dansmith: Nice that you preserve the fallback to using 'disk_dev'
14:52:04 kashyap dansmith: I guess you're (me for sure) pleasnatly surprised that it turned out to be much less of code-footprint than anticipated
14:52:12 kashyap (Unless there are no nasty surprises lurking somewhere)
14:52:43 dansmith yeah I originally had rewritten all the detach stuff to use that per-alias method, but realized it was really not necessary and that I could just change how we looked it up instead
14:53:00 dansmith which is much smaller *and* should apply to the other places where we just need to look it up and not detach
14:53:39 kashyap Smart. (On changing how we looked it up. I would've racked my brains longer)
14:53:54 opendevreview Pavlo Shchelokovskyy proposed openstack/nova master: Replace -- as 3-4 char in hostname with - https://review.opendev.org/c/openstack/nova/+/893072
14:54:59 dansmith so I'm hoping that helper on guest that looks up all devices and then finds by alias will work for interfaces in a similar workflow
14:55:52 kashyap You already ran nova.tests.unit.virt.libvirt.* unit tests locallY?
14:57:02 dansmith no, no tests, it just works in a devstack
14:57:04 opendevreview Elod Illes proposed openstack/nova stable/xena: Don't provide MTU value in metadata service if DHCP is enabled https://review.opendev.org/c/openstack/nova/+/879703
14:57:12 opendevreview Pavlo Shchelokovskyy proposed openstack/nova master: Replace -- as 3-4 char in hostname with - https://review.opendev.org/c/openstack/nova/+/893072
14:57:43 dansmith kashyap: i.e.: Aug 29 14:40:22 jammy nova-compute[306476]: DEBUG nova.virt.libvirt.driver [None req-323b5960-d0c5-4729-b269-5743cd4fdf90 demo demo] Found disk vdb by alias ua-ada5af06-300e-4d07-931d-3cc2bff8a8a9 {{(pid=306476) _get_guest_disk_device /opt/stack/nova/nova/virt/libvirt/driver.py:2722}}
14:58:28 kashyap Ah, nice.
15:01:57 opendevreview Elod Illes proposed openstack/nova stable/wallaby: Don't provide MTU value in metadata service if DHCP is enabled https://review.opendev.org/c/openstack/nova/+/879704
15:02:11 kashyap dansmith: I'm just quietly wondering if there are scenarios where we have to care about transient disk configs at all
15:02:16 bauzas auniyal: left a comment on https://review.opendev.org/c/openstack/nova/+/889947 but also on the dependent patch, please review it as soon as you can
15:03:20 opendevreview Elod Illes proposed openstack/nova stable/victoria: Don't provide MTU value in metadata service if DHCP is enabled https://review.opendev.org/c/openstack/nova/+/879705
15:04:14 dansmith kashyap: meaning all the detaching from live+persistent you mean?
15:04:35 dansmith AFAIK we pretty much always keep them in sync, so I'm not sure why we're going to all that trouble, yeah
15:05:01 kashyap (Yeah, detach from both live and persistent)
15:05:31 kashyap I didn't realize we're keeping them in sync. Then one less trouble.
15:06:06 opendevreview Elod Illes proposed openstack/nova stable/ussuri: Don't provide MTU value in metadata service if DHCP is enabled https://review.opendev.org/c/openstack/nova/+/879702
15:06:36 bauzas reminder : nova meeting in 55 mins (heya, back)
15:32:47 opendevreview Pavlo Shchelokovskyy proposed openstack/nova master: Replace -- as 3-4 char in hostname with - https://review.opendev.org/c/openstack/nova/+/893072
15:48:19 bauzas auniyal: also gave -1 for a few nits on https://review.opendev.org/c/openstack/nova/+/882284
16:00:00 auniyal ack bauzas, thanks for reviews
16:00:07 bauzas #startmeeting nova
16:00:07 opendevmeet Meeting started Tue Aug 29 16:00:07 2023 UTC and is due to finish in 60 minutes. The chair is bauzas. Information about MeetBot at http://wiki.debian.org/MeetBot.
16:00:07 opendevmeet Useful Commands: #action #agreed #help #info #idea #link #topic #startvote.
16:00:07 opendevmeet The meeting name has been set to 'nova'
16:00:18 bauzas hey folks, welcome
16:00:25 auniyal o/
16:00:26 bauzas I'm eventually released from Canada
16:00:37 bauzas #link https://wiki.openstack.org/wiki/Meetings/Nova#Agenda_for_next_meeting
16:00:44 bauzas who's around ?
16:01:00 Uggla o/
16:01:20 gmann o/
16:01:23 elodilles o/
16:01:36 bauzas we can softly start
16:01:49 bauzas #topic Bugs (stuck/critical)
16:01:53 bauzas #info No Critical bug
16:01:57 bauzas #link https://bugs.launchpad.net/nova/+bugs?search=Search&field.status=New 49 new untriaged bugs (+9 since the last meeting)
16:01:58 dansmith o/
16:02:02 bauzas #info Add yourself in the team bug roster if you want to help https://etherpad.opendev.org/p/nova-bug-triage-roster
16:02:18 bauzas so, we would like to do some bug triage
16:02:50 bauzas auniyal: you're the next in the roster list, fancy with this ?
16:02:58 auniyal ack bauzas
16:03:01 auniyal yes
16:03:05 bauzas very much appreciated
16:03:18 bauzas #info bug baton is auniyal
16:03:23 bauzas thanks
16:03:36 bauzas moving on, I don't see any critical bug to discuss
16:03:40 bauzas #topic Gate status
16:03:59 bauzas #link https://bugs.launchpad.net/nova/+bugs?field.tag=gate-failure Nova gate bugs
16:04:05 bauzas #link https://etherpad.opendev.org/p/nova-ci-failures
16:04:16 bauzas #link https://zuul.openstack.org/builds?project=openstack%2Fnova&project=openstack%2Fplacement&pipeline=periodic-weekly Nova&Placement periodic jobs status
16:04:26 bauzas #info nova-emulation seems flakey
16:04:34 bauzas #info https://zuul.openstack.org/build/209dc9676c4149b281420d9ae18f889c
16:05:05 dansmith things are better lately, thanks to a lot of hard work by a number of people, most recently probably melwitt with an LVM fix that might help with some stability, and a functional fix from gibi
16:05:22 bauzas dansmith: ++, I was about to ask for news :)
16:05:49 dansmith still need to work on some random timeouts we get which I think is related to stress on the api workers (at least in part) and melwitt has a green/native threads refactor up which I hope will eventually help with that
16:06:00 bauzas I have to admit the issues I've seen are out of my knowledge area :(
16:06:25 dansmith also still occasional OOMs which are hard to address when we're legitimately running out of memory if we get unlucky with what gets started when
16:06:29 bauzas dansmith: ack, any change in particular for greenthreading ?
16:06:54 dansmith bauzas: we need to move to native threads in nova-api when under wsgi so that we can handle more than two things at once
16:07:11 dansmith *and* so we can enable it in devstack so that other services which can already do so can leverage that :)

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