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| gibi | #startmeeting nova | 16:00 |
|---|---|---|
| openstack | Meeting started Thu Apr 15 16:00:24 2021 UTC and is due to finish in 60 minutes. The chair is gibi. Information about MeetBot at http://wiki.debian.org/MeetBot. | 16:00 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 16:00 |
| *** openstack changes topic to " (Meeting topic: nova)" | 16:00 | |
| openstack | The meeting name has been set to 'nova' | 16:00 |
| gibi | o/ | 16:00 |
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| ganso | o/ | 16:01 |
| lyarwood | o/ | 16:01 |
| elod | o/ | 16:02 |
| gibi | #topic Bugs (stuck/critical) | 16:02 |
| *** openstack changes topic to "Bugs (stuck/critical) (Meeting topic: nova)" | 16:02 | |
| gibi | No Critical bugs | 16:02 |
| bauzas | \o | 16:02 |
| gibi | #link 18 new untriaged bugs (+4 since the last meeting): #link https://bugs.launchpad.net/nova/+bugs?search=Search&field.status=New | 16:02 |
| gibi | It seems that the gerrit - launchpad integration started to work so bug status expected to be updated automatically from gerrit again. | 16:02 |
| gibi | Details: #link http://eavesdrop.openstack.org/irclogs/%23openstack-infra/%23openstack-infra.2021-04-15.log.html#t2021-04-15T14:28:21 | 16:02 |
| dansmith | o/ | 16:02 |
| stephenfin | o/ | 16:02 |
| gibi | is there any specific bug we need to talk about? | 16:03 |
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| stephenfin | There's that gate bug, but I guess we'll get to it shortly | 16:03 |
| gibi | yupp | 16:03 |
| gibi | anything else on bug side? | 16:03 |
| gibi | #topic Gate status | 16:04 |
| *** openstack changes topic to "Gate status (Meeting topic: nova)" | 16:04 | |
| gibi | We have a high failure rate in the live migration job due to #link https://bugs.launchpad.net/tempest/+bug/1924258 | 16:04 |
| openstack | Launchpad bug 1924258 in tempest "test_live_migration_with_trunk fails intermittently" [Undecided,In progress] - Assigned to Lajos Katona (lajos-katona) | 16:04 |
| gibi | stephenfin: Is this you wanted to add? ^^ | 16:05 |
| gibi | it just got a WIP patch #link https://review.opendev.org/c/openstack/tempest/+/786465 | 16:05 |
| stephenfin | that's the one | 16:05 |
| gibi | any other gate issue we should know about? | 16:06 |
| gmann | o/ | 16:06 |
| gibi | #topic Release Planning | 16:07 |
| *** openstack changes topic to "Release Planning (Meeting topic: nova)" | 16:07 | |
| gibi | Wallaby has been released | 16:07 |
| gibi | Thank you all who made it happen! \o/ | 16:07 |
| gibi | Wallaby project update call happened today, the recording is available here: #link https://www.youtube.com/watch?v=tZ2bfdF0fOg | 16:07 |
| gibi | We need two patches to land to fully open the master to Xena | 16:07 |
| gibi | #link https://review.opendev.org/c/openstack/nova/+/782171 | 16:07 |
| gibi | #link https://review.opendev.org/c/openstack/nova/+/778923 | 16:07 |
| gibi | needs some eyes from cores ^^ | 16:08 |
| gibi | any other release info? | 16:08 |
| stephenfin | I'm +2 on both of those now | 16:09 |
| gibi | stephenfin: thanks! | 16:10 |
| stephenfin | needs another +2 for https://review.opendev.org/c/openstack/nova/+/782171 | 16:10 |
| gibi | #topic PTG planning | 16:10 |
| *** openstack changes topic to "PTG planning (Meeting topic: nova)" | 16:10 | |
| gibi | PTG is next week! | 16:10 |
| gibi | topics: #link https://etherpad.opendev.org/p/nova-xena-ptg | 16:10 |
| bauzas | I miss you all folks | 16:10 |
| gibi | me too | 16:10 |
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| * bauzas needs to prepare the PTG... by filling up his keg | 16:11 | |
| gibi | recent updates in the ptg schedule: | 16:11 |
| gibi | A small neutron - nova cross project is booked for Friday 15:00 UTC, we have only one topic. | 16:11 |
| gibi | Also there was a request for an interop session from Arkady and it is booked to Wednesday 14:00 UTC | 16:11 |
| gibi | I did a minimal reorg on the nova topics but the basic rule that we well go from top to bottom and potentially defer topics if the author / expert is not available. | 16:11 |
| gibi | if anybody has a topic that needs special timing then let me know and I will note it | 16:12 |
| gibi | and try to schedule it | 16:12 |
| gibi | ptg bot is up to date #link http://ptg.openstack.org/ptg.html | 16:12 |
| gibi | next week we will skip the weekly meeting due to PTG | 16:13 |
| gibi | anything else about next week and the PTG? | 16:14 |
| gibi | #topic Stable Branches | 16:15 |
| *** openstack changes topic to "Stable Branches (Meeting topic: nova)" | 16:15 | |
| gibi | stable/wallaby is open for bug fix backports | 16:15 |
| gibi | stable gates should be OK from Wallaby till Pike (stackviz post-task workarounds are merged) | 16:15 |
| gibi | EOM | 16:15 |
| gibi | thanks elod for the update | 16:15 |
| elod | np | 16:15 |
| gibi | anything else on stable? | 16:16 |
| elod | nothing else from me | 16:16 |
| gmann | +1 | 16:17 |
| bauzas | how are the stable branch jobs ? | 16:17 |
| gmann | it should be green now after stackviz workaround and grenade stable/train fixes | 16:18 |
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| gmann | this on pike merged 5 days ago, so should be all green https://review.opendev.org/c/openstack/nova/+/723055 | 16:19 |
| elod | yes, as I saw they are OK, thanks for the fixes | 16:19 |
| bauzas | thanks | 16:20 |
| gibi | #topic Sub/related team Highlights | 16:20 |
| *** openstack changes topic to "Sub/related team Highlights (Meeting topic: nova)" | 16:20 | |
| gibi | Libvirt (bauzas) | 16:20 |
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| bauzas | well, mnaser filed a complaint about how bad I write libvirt features | 16:21 |
| bauzas | so, now, in order to avoid jail, I have to work on https://bugs.launchpad.net/nova/+bug/1900800 and deliver appropriate backports | 16:21 |
| openstack | Launchpad bug 1900800 in OpenStack Compute (nova) "VGPUs is not recreated on host reboot" [Low,Confirmed] - Assigned to Sylvain Bauza (sylvain-bauza) | 16:21 |
| bauzas | that's it. | 16:21 |
| gibi | I saw you found a way forward about it | 16:21 |
| bauzas | (this was a joke, to be 100% clear) | 16:22 |
| bauzas | moving on | 16:22 |
| gibi | #topic Open discussion | 16:22 |
| *** openstack changes topic to "Open discussion (Meeting topic: nova)" | 16:23 | |
| lassimus87 | I'd like to discuss adding support for guests with arch != host arch. I'm tracking @stephenfin and others topics in ptg etherpad. I have a working concept here: https://review.opendev.org/c/openstack/nova/+/772156. I've been afk for the last few weeks waiting out the wallaby release period, so I have some new merge conflicts to resolve. I'm | 16:23 |
| lassimus87 | bringing it up here because there seems to be differing opinions on the direction of nova regarding emulation support. | 16:23 |
| gibi | lassimus87: could you open up what are the differing options? | 16:23 |
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| bauzas | this rings me a bell. | 16:24 |
| lassimus87 | "Only conflict is if we ever wanted to support non-host guests using these architectures but that seems to be a non-goal of nova?(maybe we shoudl rephsase this as dropping supprot for 32bit hosts) that might be a valid cross project goal." --@stephenfin from the xena ptg notes | 16:24 |
| bauzas | belmoreira was interested in this, if I recall correctly | 16:24 |
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| lassimus | okay I got my nick back :) | 16:24 |
| stephenfin | I think this would be worth discussing at the PTG, if possible | 16:25 |
| stephenfin | My point there is that we tend to conflate host and guest architectures, since we've haven't support host != guest architecture for some time now | 16:25 |
| lassimus | I'm fine waiting to discuss until the PTG. I'm new to the nova dev community, so I didn't want to add discussion directly to etherpad | 16:26 |
| gibi | lassimus: feel free to add discussion to the ptg etherpad | 16:26 |
| stephenfin | We have checks for things like MIPS, which no new hardware is being made for, which means we could drop the host architecture support, but I'm not sure if we can drop the guest architecture support | 16:26 |
| stephenfin | so yeah, a good PTG topic | 16:26 |
| gibi | lassimus: will you be able to join us during the PTG next week? | 16:27 |
| lassimus | awesome. I'll add some thoughts on etherpad, and I look forward to hashing it out next week | 16:27 |
| lassimus | yes | 16:27 |
| gibi | lassimus: I will make sure to ping you when we reach this topic next week | 16:27 |
| lassimus | perfect | 16:28 |
| gibi | I do feel that we had guest != host request from CERN so you are not alone | 16:28 |
| bauzas | right, hence my courtesy ping to belmoreira :) | 16:28 |
| gibi | bauzas: ++ | 16:28 |
| lassimus | my customer is the Georgia Cyber Center, and some other minor interested parties | 16:28 |
| gibi | lassimus: cool | 16:29 |
| bauzas | that's a reasonable ask, but we need to discuss the design | 16:29 |
| * artom thought there was a massive emulation performance penalty on that, last time he checked | 16:29 | |
| artom | Though I guess it depends on the specific arch's | 16:29 |
| bauzas | artom: yup, from my recollection | 16:29 |
| lassimus | performance isn't always the goal | 16:29 |
| bauzas | but there are good reasons now to mix them up | 16:29 |
| artom | So I am a bit curious what use cases don't mind the perf hit | 16:29 |
| bauzas | spec up ! | 16:29 |
| bauzas | :p | 16:29 |
| bauzas | unkidding, sounds a good PTG discussion | 16:30 |
| gibi | artom: I can imagine a CI system functional testing arch specific app in a cheap way | 16:30 |
| gibi | ppc tend to be expensive | 16:30 |
| lassimus | yeah, I'm happy to brain dump here, but it seems like a better fit for the PTG | 16:30 |
| gibi | sure, lets do the braindumping next week | 16:30 |
| gibi | any other topic for today? | 16:31 |
| ganso | gibi: o/ my topic is on the agenda | 16:31 |
| gibi | ganso: ohh, I missed that, please tell us | 16:31 |
| ganso | topic: update on bug 1821755 (ganso) | 16:31 |
| openstack | bug 1821755 in OpenStack Compute (nova) "live migration break the anti-affinity policy of server group simultaneously" [Medium,In progress] https://launchpad.net/bugs/1821755 - Assigned to Boxiang Zhu (bxzhu-5355) | 16:31 |
| ganso | so, I've brought this up in a meeting previously about addressing this bug | 16:31 |
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| ganso | but I leaned towards a redesign of the (anti-)affinity functionality in placement | 16:32 |
| ganso | I spent a significant amount of effort on that and hit several struggles. It can be done, but the amount of work and complexity has increased far beyond what I initially estimated | 16:32 |
| bauzas | affinity in placement is a can of worms | 16:33 |
| ganso | bauzas: yea, looks like I hit some of those worms xD | 16:33 |
| ganso | therefore I decided to take a step back and try a simpler alternative | 16:33 |
| artom | Angry worms, with teeth and spikes and venomous stingers | 16:33 |
| bauzas | I thought we said we should model the affinity between RPs as a distance between them | 16:33 |
| ganso | voi-la https://review.opendev.org/c/openstack/nova/+/784166 | 16:33 |
| ganso | basically I took inspiration from a previous attempt on solving the bug (https://review.openstack.org/651969) | 16:34 |
| ganso | and did some things differently | 16:34 |
| bauzas | ganso: I discover the bug, what's the problem ? | 16:34 |
| ganso | in my testing I was not able to reproduce the issue for anti-affinity any longer | 16:34 |
| ganso | bauzas: sorry I didn't understand your question? | 16:35 |
| bauzas | don't we have the late affinity check ? | 16:35 |
| bauzas | on the compute service | 16:35 |
| gibi | bauzas: I think this patch now adds the late affinity check for live migration | 16:35 |
| bauzas | or have we removed it? | 16:35 |
| ganso | bauzas: oh ok, so the problem is that there are race conditions that violate the policy when doing concurrent migrations (live or cold) | 16:35 |
| artom | bauzas, yeah, we only have that check for boot, and no other move operation | 16:35 |
| bauzas | artom: really? I'm surprised | 16:35 |
| artom | I'm not :P | 16:36 |
| ganso | bauzas: the existing check worked only for when creating instances, and it doesn't account for instances are being migrated to that host | 16:36 |
| bauzas | actually reading mriedem's comment | 16:36 |
| bauzas | okay, this sounds a decent review request then | 16:36 |
| gibi | yeah, I queued it up to my review list | 16:37 |
| artom | I mean, I agree the "correct" way to do it would be placement | 16:37 |
| artom | Anything else is hax. | 16:37 |
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| artom | OTOH, the former is hard, and the latter is much quicker and easier | 16:37 |
| gibi | and I agree that affinity and placement is a hard topic so I have no problem having a hax in the meantime | 16:37 |
| ganso | there is a lengthy discussion on the gerrit page, I tried to address all comments with as much detail as I can to move this forward. There is also a summary of my work in the redesign in one of the comments (the lenghiest one) | 16:37 |
| ganso | gibi, artom: so, the patch I'm proposing only addresses anti-affinity, not affinity | 16:38 |
| gibi | ganso: thanks for picking this work up I will try to get to it tomorrow | 16:38 |
| ganso | those are 2 different can of worms, and I found the affinity ones to be the most venomous ones :P | 16:38 |
| bauzas | ganso: which is what the late-affinity check is doing | 16:38 |
| bauzas | violating the affinity policy isn't a race for a single compute | 16:39 |
| ganso | doing both through placement is a huge amount of work. Doing just one leaves things hanging and incomplete, possibly requiring another redesign for implementing the other one | 16:39 |
| bauzas | you just don't see the race as both instances are spreaded | 16:39 |
| bauzas | ganso: I totally agree and I fundamentally disagree with sean-k-mooney's objection :) | 16:40 |
| bauzas | sad he isn't here :) | 16:40 |
| ganso | bauzas: yea I use 5 computes in my lab, makes it much easier to reproduce and visualize the violations | 16:40 |
| ganso | that's all I had. Thanks all and looking forward to your reviews :) | 16:41 |
| gibi | ganso: thanks for working on the bug | 16:41 |
| bauzas | yup | 16:41 |
| gibi | anything else for today? | 16:41 |
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| gibi | if not then I thank all of you to join today | 16:42 |
| gibi | I will have glass of vine for the wallaby release. thanks again to make that happen | 16:43 |
| gibi | not the wine, the release :D | 16:43 |
| gibi | #endmeeting | 16:43 |
| *** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 16:43 | |
| openstack | Meeting ended Thu Apr 15 16:43:56 2021 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 16:43 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/nova/2021/nova.2021-04-15-16.00.html | 16:43 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/nova/2021/nova.2021-04-15-16.00.txt | 16:44 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/nova/2021/nova.2021-04-15-16.00.log.html | 16:44 |
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| elod | thanks o/ | 16:44 |
| elod | and enjoy the wine :D | 16:44 |
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