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| openstackgerrit | Chris Dent proposed openstack/nova master: Delete the placement code https://review.openstack.org/618215 | 09:21 |
|---|---|---|
| openstackgerrit | Chris Dent proposed openstack/nova master: Switch to using os-resource-classes https://review.openstack.org/628278 | 09:21 |
| openstackgerrit | Chris Dent proposed openstack/nova master: Update nova docs front page for placement removal https://review.openstack.org/628183 | 09:22 |
| openstackgerrit | Chris Dent proposed openstack/nova master: Remove placement from nova install docs https://review.openstack.org/628184 | 09:22 |
| openstackgerrit | Chris Dent proposed openstack/nova master: Remove link to placement configuration from nova config docs https://review.openstack.org/628185 | 09:22 |
| openstackgerrit | Chris Dent proposed openstack/nova master: Remove placement from contributor doc https://review.openstack.org/628186 | 09:22 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 10:10 |
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| openstackgerrit | Jan Gutter proposed openstack/os-vif master: Enable generic datapath offloads in the ovs plugin https://review.openstack.org/634679 | 12:39 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 12:45 |
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| openstackgerrit | Stephen Finucane proposed openstack/nova master: API: Remove evacuate/live-migrate 'force' parameter https://review.openstack.org/634600 | 12:51 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 12:55 |
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| openstackgerrit | Balazs Gibizer proposed openstack/nova master: Fup for the bandwidth resource provider series https://review.openstack.org/633776 | 13:05 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 13:06 |
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| openstackgerrit | Balazs Gibizer proposed openstack/nova master: Fup for the bandwidth resource provider series https://review.openstack.org/633776 | 13:10 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 13:15 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 13:28 |
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| bauzas | good morning Nova | 13:34 |
| * bauzas tries to split his time better between downstream and upstream | 13:34 | |
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| efried | n-sch meeting in 14 minutes in #openstack-meeting-alt | 13:46 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 14:00 |
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| tinwood | hello nova patchset reviewers: please, any chance someone can take a look at https://review.openstack.org/#/c/633279/ for me and yay/nay it? Thanks? | 14:11 |
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| mriedem | jaypipes: from here i'm +2 on several bw provider series patches https://review.openstack.org/#/c/630723/ - i talked with the brother gib last week and i'll do a follow up for these to address nits | 14:14 |
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| bauzas | efried: question on https://review.openstack.org/#/c/617042/17 | 14:29 |
| * efried looks | 14:29 | |
| bauzas | efried: that's mostly a nit but I don't get why we need to keep a RT dependent reportclient | 14:29 |
| bauzas | on the compute manager | 14:29 |
| bauzas | given we already keep track of N RTs, that would make us using N references for the same ting | 14:30 |
| bauzas | of course, that's a nity | 14:30 |
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| efried | bauzas: responded | 14:31 |
| * bauzas looks | 14:31 | |
| efried | bauzas: We don't actually keep track of N RTs. I believe jaypipes was the one who got rid of that and we just use one now. | 14:31 |
| bauzas | oh ok, my internal mind is out of date | 14:32 |
| bauzas | but whatever, why do we need to keep the transitive relationship and infer reportclient from the RT ? | 14:32 |
| efried | bauzas: Yeah, the getter above that one shows just using one rt | 14:32 |
| bauzas | note : I haven't read your comment yet :) | 14:33 |
| mriedem | N = 1 | 14:33 |
| mriedem | so not a big deal | 14:33 |
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| efried | bauzas: Yeah, here's the conversation with jaypipes (and cdent) earlier on: https://review.openstack.org/#/c/617042/14/nova/compute/manager.py@558 | 14:34 |
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| bauzas | okay, I don't want to hold for a nit if N = 1 | 14:35 |
| efried | bauzas: Thank you sir. I added some more info to hopefully clarify why we get the rt's report client instead of creating a new one. | 14:40 |
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| bauzas | ack ok | 14:40 |
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| bauzas | efried: actually, I'm reviwing https://review.openstack.org/#/c/620711/18/nova/compute/manager.py | 14:41 |
| bauzas | and all of that just disappears, so meh | 14:41 |
| efried | more or less. We're still doing the same thing, getting the rc from the rt. We just don't need to be as careful about the getter anymore. | 14:41 |
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| bauzas | agreed, it's a femtonit | 14:44 |
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| bauzas | efried: except the fact that we uselessly need a dependency of the RT for calling the ReportClient but I guess we won't remove the RT dependency from the compute service soon :p | 14:45 |
| efried | bauzas: Okay, but even if we did, we would then still have to do *something* to ensure we only had one reportclient. | 14:46 |
| efried | else multiple caches getting out of sync, etc. | 14:46 |
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| efried | bauzas: I think I agree it would be prettier if we made the reportclient a global singleton. I can work on that in a fup if you think it's worthwhile. | 14:48 |
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| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 14:49 |
| bauzas | efried: nah, fine by me | 14:49 |
| stephenfin | mriedem: Not sure if you saw this already, but I'd done the work for that BP before I saw your ping this morning https://review.openstack.org/634600 | 14:50 |
| stephenfin | At least, I think that's most of it done | 14:50 |
| efried | cdent, stephenfin: What's that sphinx syntax for referring to a doc in another repo? :doc-foo:`words </path/to>` or something? | 14:50 |
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| stephenfin | efried: https://docs.openstack.org/openstackdocstheme/latest/#external-link-helper | 14:51 |
| efried | ah, the reverse, swhy I couldn't find it. Thanks stephenfin | 14:51 |
| mriedem | stephenfin: ack i'll switch the blueprint to you | 14:51 |
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| efried | stephenfin: I thought there was a way to omit link text and it would automatically suck in the title of the target. Am I making that up? | 15:02 |
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| stephenfin | efried: Only if you're using referencing something from the same doc (i.e. the normal 'doc' role) | 15:17 |
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| mriedem | dansmith: on this per-instance serial number change, which now does what you asked for, https://review.openstack.org/#/c/619953/ - do you have any additional comments to what i already put in there? mine are mostly nits. kevin is out this week on holiday so if there are small changes i can make them. today is the last day for that one in a runway slot. | 15:18 |
| dansmith | mriedem: let me get a refill and I'll have a look | 15:19 |
| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 15:19 |
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| efried | stephenfin: ack, thanks. | 15:27 |
| efried | and, that makes sense; otherwise, how would it know? | 15:27 |
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| mriedem | dansmith: jaypipes: thanks on both, i'll work on follow ups this morning | 15:33 |
| openstackgerrit | Jack Ding proposed openstack/nova master: Flavor extra spec and image properties validation https://review.openstack.org/620706 | 15:34 |
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| tinwood | dansmith, would it be possible, please, for you to take a quick look at: https://review.openstack.org/#/c/633279/ thanks. | 15:46 |
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| spatel | sean-k-mooney: morning! | 15:52 |
| sean-k-mooney | spatel: o/ | 15:53 |
| spatel | its been long time so thought "wave" | 15:53 |
| sean-k-mooney | spatel: hopefully that means your cloud has been working to expectations | 15:54 |
| spatel | i was busy in datacenter migration stuff.. but so far everything good | 15:54 |
| spatel | My cloud is blooming...! +400 instance total and growing.. | 15:55 |
| sean-k-mooney | spatel: see now you have doomed yourself by saying that. but glad to hear | 15:55 |
| spatel | Soon planning to build new cloud.. not sure how much i can stuff in existing one. | 15:56 |
| sean-k-mooney | it will be interesting to hear form you in 12-18 month as to if it proved more cost effective vs aws in the long run | 15:56 |
| spatel | Believe me... its very cost effective... + my 50% datacenter is empty because i am stuffing application as much as possible in cloud | 15:57 |
| sean-k-mooney | spatel: and you are achiving the perfomance KPI that are needed for your workload? | 15:58 |
| sean-k-mooney | i assume you are till using sriov | 15:58 |
| sean-k-mooney | *still | 15:58 |
| spatel | interesting thing.. we are running real-time application in very latency sensitive environment :) got very good feedback from customer also :) | 15:58 |
| spatel | Yes everything in sriov ( next cloud going to be on dpdk ) | 15:59 |
| sean-k-mooney | well make sure to build a small test clust to verify its performacne before you make that switch | 16:00 |
| spatel | we are providing close to HD audio quality with sr-iov | 16:00 |
| spatel | ++ (will do lab test before go) | 16:00 |
| sean-k-mooney | spatel: by the way you will be happy to know https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:master+topic:bp/libvirt-neutron-sriov-livemigration is makeing good progress | 16:01 |
| spatel | + boy... that would be my dream to do live-migration over SR-IOV | 16:01 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: doc: link admin/configuration from admin home page https://review.openstack.org/634728 | 16:02 |
| sean-k-mooney | spatel: be aware that for direct mode sriov there is still a network outage unless you create a bond in the guest | 16:02 |
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| spatel | bonding in guest is other complicated project :( | 16:03 |
| sean-k-mooney | spatel: this is basically the first step in sriov migratoin. for macvtap sriov it will be complete. | 16:03 |
| sean-k-mooney | for direct mode sriov there are some upcoming feature in the kernel/kvm and in vendor nics that may help | 16:04 |
| spatel | macvtap isn't good, i did try and got packet drops during load-test | 16:04 |
| sean-k-mooney | ya | 16:04 |
| sean-k-mooney | the ida would be you would bound a direct mode and macvtap vf together and fall back to the macvtap during migration and then swithc back to direct mode vf | 16:05 |
| spatel | oh!!! that is sweet! | 16:05 |
| spatel | i don't mind small downtime during live-migration as far as it meet SLA | 16:06 |
| spatel | Do you think it will be ready in stain release ? | 16:07 |
| sean-k-mooney | openstack wont do the bonding for you but i hope we will merge the migration support in stein yes | 16:07 |
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| spatel | cool! | 16:08 |
| sean-k-mooney | spatel: currently the code is complete so we are just waiting for a runway slot and reviewer feedback at this point. | 16:08 |
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| spatel | I don't have any lab at present otherwise i love to do some testing.. | 16:09 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: doc: link Kashyap's cpu model talk to the libvirt driver config docs https://review.openstack.org/634731 | 16:09 |
| mriedem | kashyap: ^ nice talk | 16:09 |
| kashyap | mriedem: Hi, thanks! /me practised it 4 times to a rubber duck | 16:10 |
| kashyap | On a call; meetings-- | 16:10 |
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| * kashyap adds it in queue | 16:10 | |
| mriedem | kashyap: it showed that you practiced it, very smooth | 16:11 |
| mriedem | but you were soooo thirsty | 16:11 |
| kashyap | BTW, on Sunday ran into The Tuba Guy at FOSDEM. He happened to be sitting right behind me | 16:11 |
| kashyap | mriedem: Darn, there is a story behind that water bottle trick | 16:11 |
| kashyap | Back when I was in university, some 12 years ago, I had to give my first public talk on USB 3.0 or something... | 16:12 |
| kashyap | And my throat completely dried out, and the teacher insulted me in front of the whole class: | 16:12 |
| kashyap | Saying ... "What kind of a talk is that?!" | 16:12 |
| * kashyap almost burst into tears :D | 16:12 | |
| kashyap | Never forget that experience | 16:12 |
| kashyap | But more to the bottle: I use it as a trick to forcefully "pause" myself | 16:13 |
| kashyap | And not drone on-and-on. | 16:13 |
| kashyap | s/bottle/water bottle/ | 16:13 |
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| bauzas | ok, bailing out from upstream after 3 hours working on it \o | 16:26 |
| bauzas | https://twitter.com/sylvainbauza/status/1092426500434022402 | 16:26 |
| bauzas | at least I dedicated 3 hours for nova since 2 weeks... | 16:27 |
| * bauzas will try to be a bit verbose about when he's working upstream | 16:27 | |
| sean-k-mooney | bauzas: the vpn outage proably helped somewhat today | 16:28 |
| bauzas | sean-k-mooney: not really, I planned to work for 3 hours anyway | 16:28 |
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| bauzas | I thought about this from the last weekend | 16:29 |
| sean-k-mooney | i planned to start backpoting something and did some code review upstream instead | 16:29 |
| sean-k-mooney | bauzas: its a good idea | 16:29 |
| bauzas | and finally I think I very need to say "sorry but I need to work upstream *now*' | 16:29 |
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| artom | sean-k-mooney, to answer your downstream channel question, yeah, more work is required to actually generate the new XML | 16:29 |
| bauzas | because if not, there will be some other priorities again and again | 16:29 |
| artom | The claims are used to get the new instance NUMA topology | 16:29 |
| sean-k-mooney | artom: are they actully used currently. i was not sure they were actully being used yet in the code you have pused. | 16:30 |
| artom | sean-k-mooney, they're not used yet, no | 16:31 |
| sean-k-mooney | artom: ok because the titile of https://review.openstack.org/#/c/634606/ consufed me a little | 16:31 |
| artom | I mean, when creating the claim, the new instance NUMA topology is calculated, so it should throw a resources unavailable exception if it can't fit | 16:31 |
| artom | But then that new topology isn't used anywhere (yet) | 16:32 |
| sean-k-mooney | artom: ya that makes sense | 16:32 |
| artom | sean-k-mooney, hrmm, yeah, maybe I'll rephrase it as "create claims" or something | 16:32 |
| artom | Since as you correctly pointed out, they're not actually used | 16:32 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: doc: update the security groups admin doc https://review.openstack.org/634735 | 16:33 |
| sean-k-mooney | ya i spend about 10-15 mins looking to see if they were actully used idrectly some how then my vpn dropped and i got tea | 16:33 |
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| artom | So British (yes, I know you're Irish) | 16:34 |
| sean-k-mooney | those be fighting words :P | 16:34 |
| artom | There's no "UK" adjective! | 16:34 |
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| sean-k-mooney | ireland is not in the uk | 16:34 |
| artom | *facepalm* | 16:34 |
| artom | You're right, of course. | 16:34 |
| kashyap | mriedem: If I spend this week on this https://review.openstack.org/#/c/632507/ ([WIP] libvirt: Bump MIN_{LIBVIRT,QEMU}_VERSION for "Stein"), and related clean-ups -- worth getting in before M3? | 16:35 |
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| * kashyap needs to run to his Dutch class; will resume on it early tomm. | 16:35 | |
| artom | There's no adjective for "those tea-guzzling bastids" then :D | 16:35 |
| sean-k-mooney | hehe :) | 16:36 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: Change nova-next job to run with python3 https://review.openstack.org/634739 | 16:37 |
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| mriedem | kashyap: idk, i generally like to raise minimums at the beginning of the cycle | 16:39 |
| mriedem | if we're going to raise minimums | 16:39 |
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| mriedem | an operator that was upgrading recently asked me if the last time we raised minimums (in queens i think) was because of any functional reason or just code cleanup since it meant they had a harder upgrade (new centos versions and such on their compute nodes) | 16:40 |
| mriedem | they were also upgrading from mitaka though i think so likely going to have some of that (OS upgrades etc) | 16:41 |
| kashyap | mriedem: Yeah, you're totally right -- I completely forgot at the beginning of the cycle about this :-( | 16:42 |
| stephenfin | mriedem, sean-k-mooney: This feels like something that would warrant a reno given the change in behavior. Thoughts? https://review.openstack.org/#/c/626381 | 16:42 |
| mriedem | "fyi nova-compute will no longer corrupt your database you're welcome' | 16:42 |
| mriedem | stephenfin: the behavior was shit | 16:43 |
| mriedem | so if we have a reno, i'd make it a 'fixes' reno to explain the bug being fixed | 16:43 |
| stephenfin | That it was. And I guess it's not something anyone would have been relying on | 16:43 |
| mriedem | i.e. if you had allocated pci devices in your whitelist configuration, and then changed your config to remove those whitelisted devices, nova will no longer delete those records from the db since it corrupts the resource tracking for the allocated device | 16:43 |
| mriedem | but i'm not sure ^ is worth explaining in a release note | 16:44 |
| mriedem | it might just cause more confusion/concern than necessary | 16:44 |
| stephenfin | Sweet. If you're happy, so am I | 16:44 |
| mriedem | i'm not unhappy :) | 16:45 |
| mriedem | and as you say, i hope no one was relying on this | 16:45 |
| stephenfin | So do I. I'd ask moshele if he was around but alas, he is not | 16:45 |
| mriedem | cfriesen might have an opinion | 16:45 |
| mriedem | but also not around right now | 16:46 |
| sean-k-mooney | so no new reno? i can add one but i agree with mriedem that it would be in fixes as the old bevahior was not a feature | 16:46 |
| stephenfin | sean-k-mooney: Nah, mriedem makes a good point. It was rather broken before | 16:46 |
| stephenfin | sean-k-mooney: I've just held off on the +W in case cfriesen gets a chance to wade in before tomorrow | 16:47 |
| sean-k-mooney | ok cool thanks | 16:48 |
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| stephenfin | mriedem: I must have misunderstood something but weren't we planning to deprecate this option entirely, relying on alternatives for instance-host mapping use case? https://review.openstack.org/#/c/619953/10/nova/conf/libvirt.py | 16:51 |
| sean-k-mooney | stephenfin: dan asked that we dont | 16:52 |
| mriedem | stephenfin: see dansmith's comments in an earlier PS | 16:52 |
| stephenfin | ack | 16:52 |
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| openstackgerrit | Matt Riedemann proposed openstack/nova master: Follow up for per-instance serial number change https://review.openstack.org/634743 | 16:57 |
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| stephenfin | mriedem: Fancy checking this nit fix? https://review.openstack.org/#/c/626930/ | 17:29 |
| stephenfin | *nit doc fix | 17:29 |
| mriedem | done | 17:31 |
| stephenfin | ta | 17:32 |
| mriedem | stephenfin: a couple of nits in the one on top of that | 17:33 |
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| stephenfin | I can fix those now or in a follow-up. Your call | 17:34 |
| mriedem | do it now and i'll re-approve | 17:34 |
| openstackgerrit | Stephen Finucane proposed openstack/nova master: doc: Add solution to live migration ssh issues https://review.openstack.org/626931 | 17:36 |
| stephenfin | mriedem: done ^ | 17:36 |
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| efried | Hey folks, where are we with NUMA modeling in placement? | 17:49 |
| efried | Is that still on ice? Has bp/numa-aware-live-migration brought it back into play? Or are we still doing that bp with the old style NUMA modeling? | 17:49 |
| efried | artom jaypipes cdent sean-k-mooney | 17:49 |
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| sean-k-mooney | the numa aware migration is entirely done via the resource tracker | 17:50 |
| sean-k-mooney | efried: so its still on ice until train | 17:50 |
| sean-k-mooney | efried: the RT changes will still be needed in eitehr case | 17:50 |
| efried | So would it be appropriate to start proposing spec content for train around NUMA modeling in placement? (Again) | 17:51 |
| sean-k-mooney | bauzas: ^ | 17:51 |
| efried | i.e. using nested providers to represent NUMA nodes, figuring out a way to represent subtree affinity, etc. | 17:51 |
| sean-k-mooney | efried: i guess but it would be good to take a more holistic aproach i think | 17:51 |
| efried | holistic in what sense? | 17:52 |
| sean-k-mooney | well there are a number of feature in the libvirt driver (pinning,hugepages,reatime,emulator threads,numn) all the nfv stuff that are not really placement friendly | 17:53 |
| sean-k-mooney | efried: i have been wondering for a while if we shoudl create a parallel implmentation of new feature that are placment aware to replace teh existing ones with | 17:53 |
| efried | not sure how we'll ever get there if we don't. | 17:54 |
| cdent | yeah, I suspect a parallel leapfrog is the way to go | 17:54 |
| sean-k-mooney | well my idea was to take the cellsv2 approcah and freeze/keep the exisiting feature set as is and work on a replacement in paralel and then swtich in U | 17:55 |
| openstackgerrit | Merged openstack/nova master: Reject migrate with port having resource request https://review.openstack.org/630723 | 17:55 |
| sean-k-mooney | it realy has become a problem lately that we have 2 seperate code patchs. 1 for numa awre guess and anotehr for non numa guests and i just feel like have one code path that works for all guesst in a common way might be the way to go | 17:56 |
| sean-k-mooney | efried: anyway that is slightly different then the question you asked | 17:57 |
| cdent | sean-k-mooney: I sometimes wonder the opposite: we should have two diferent paths: one for simple vms that normal people use, anothe for the crazy path :) | 17:57 |
| sean-k-mooney | cdent: the issue is we also have 2 sets of config options and flavor atributes | 17:58 |
| sean-k-mooney | cdent: and people mix and match them | 17:58 |
| * cdent nods | 17:58 | |
| sean-k-mooney | i think we can all agree that there should only be one way of modeling the resocues in placement | 17:59 |
| efried | s/resources in placement/resources: in placement/ | 17:59 |
| sean-k-mooney | efried: placement does not do assignment | 17:59 |
| sean-k-mooney | efried: so assignable resouces need to be tracked in the ResocueTracker also | 18:00 |
| efried | at the RP level, not at the resource level, right. | 18:00 |
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| efried | Well, arguably they need to be tracked by the virt driver. | 18:00 |
| sean-k-mooney | yes | 18:00 |
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| efried | I'm not sure there's a need for the resource tracker if all resources are tracked by the virt driver + placement. | 18:01 |
| * efried ducks | 18:01 | |
| sean-k-mooney | well kind of. in the libvirt case the Resouce track is running in the compute aganet and is populated byt the virtdriver. | 18:01 |
| cdent | efried: don't duck on that, fly that flag | 18:02 |
| sean-k-mooney | efried: the virtdriver do not get there own db tables to track things so they have to use the resouce tracker to persist there tracked resources | 18:02 |
| efried | sean-k-mooney: Oh, see, I disagree with that. The virt driver knows about its resources by looking at the VM. There shouldn't be a need to duplicate that information in an OpenStack database. | 18:03 |
| sean-k-mooney | efried: the vm xml is not persisted acroudn vm reboots | 18:04 |
| efried | oh, right, that stupid thing. We should fix *that* instead. | 18:04 |
| sean-k-mooney | it could be maintianed in memory but im not sure that would work aross agent restarts | 18:04 |
| sean-k-mooney | efried: well you just moving the state form the db to libvirt/xml or ram | 18:05 |
| efried | Let me put it this way: Do any other virt drivers have this silly ephemeralness? | 18:05 |
| efried | PowerVM doesn't. cdent, does VMWare? | 18:05 |
| efried | If you reboot an ironic node, does it forget how much memory it had? | 18:06 |
| sean-k-mooney | efried: all that info is stored in ironics db | 18:06 |
| cdent | efried: vmware keeps track of itself, yes | 18:06 |
| sean-k-mooney | libvirt db is the filesystem. | 18:06 |
| efried | right, so why should the xml go away when you reboot it? | 18:07 |
| efried | it's just a file in the file system, nah? | 18:07 |
| sean-k-mooney | if the hsot is rebooted it does not | 18:07 |
| efried | I may be tilting at windmills here, but that just seems goofy to me. | 18:07 |
| sean-k-mooney | if the vm is rebooted it does and if we are recreated multipel vms in parallel it get racy | 18:07 |
| sean-k-mooney | we could do it all in memory if we do there right locking to keep everything in sysnce or we can use a dbms | 18:08 |
| efried | needing to keep track of the assignments in the nova database is just doomed. Because different platforms have different ways of identifying/tracking their resources. You'll never get the fields right for everyone. Unless they're just a big anonymous data blob. | 18:08 |
| cdent | efried++ | 18:08 |
| efried | this is why we were in such pain in PowerVM-land trying to get "PCI" passthrough to work | 18:09 |
| cdent | virtdriver should have it's own interaction with placement | 18:09 |
| efried | and why I started on my "generic device management" crusade three years ago. | 18:09 |
| cdent | nova should just "use" that info as required | 18:09 |
| sean-k-mooney | *cough* numa toplogy blob *couch* | 18:09 |
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| sean-k-mooney | but yes you are right | 18:09 |
| sean-k-mooney | anyway we could chagne that if we did a parallel impementation | 18:09 |
| sean-k-mooney | but its non triavial | 18:10 |
| efried | smy point exactly. If the numa topology is modeled in placement, it's the virt driver's responsibility to draw that model via update_provider_tree, in whatever way is appropriate for that virt. | 18:10 |
| sean-k-mooney | efried: placement cant sotre everything we need it too | 18:10 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: Follow up (#2) for the bw resource provider series https://review.openstack.org/634767 | 18:10 |
| sean-k-mooney | but but it should be able to handel hugepges entirly | 18:10 |
| sean-k-mooney | we could model cpus but we would have to have 1 RP per cpu which is not a good design | 18:11 |
| efried | Oh, I'm not saying placement should be exploded to track individual resources. Counts ought to be fine. The individual resources should be tracked by the virt driver. And trying to store those mappings in some generic database table is going to be problematic. | 18:12 |
| efried | s/going to be// | 18:12 |
| sean-k-mooney | efried: ya. its legacy tech debt | 18:13 |
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| efried | sean-k-mooney: How do we do pinning these days? Like this: https://docs.openstack.org/nova/pike/admin/cpu-topologies.html ? | 18:13 |
| sean-k-mooney | so i think there are two parally efforts. 1.) modelign what can and should be modled in placemetn and 2.) refacorting the libvirt dirver to do assignment sanly | 18:14 |
| sean-k-mooney | efried: we use the numa toplogy blob to store the free cpus | 18:14 |
| sean-k-mooney | and then the virt driver caluates the guest topology can claims them in the host numa toplogy blob via the resouce tracker | 18:15 |
| sean-k-mooney | efried: an important thing to remember is that hw:cpu_socket hw:cpu_threads and hw:cpu_cores are all refering to the virtual toplogy and have no baring on placemnt, the host or schdueling | 18:16 |
| sean-k-mooney | efried: e.g. if the host has 1 socket you can sping up a vm with hw:cpu_sockets=8 and its fine | 18:17 |
| efried | ugh. I know I have a lot to learn here, but I suspect much of it is going to be tribal. | 18:18 |
| efried | if there are any documents that will give me some reasonably sane picture of how all this works, please do share. | 18:18 |
| sean-k-mooney | efried: stephenfin has dont some presentation on this at the summit | 18:18 |
| sean-k-mooney | or fosdem | 18:18 |
| openstackgerrit | Rodolfo Alonso Hernandez proposed openstack/os-vif master: Add native implementation OVSDB API https://review.openstack.org/482226 | 18:20 |
| cdent | that etcd-compute toy I've built takes the position of "you can only have stuff that can be represented in placement". It flows nicely. | 18:20 |
| sean-k-mooney | cdent: link? | 18:21 |
| sean-k-mooney | https://github.com/cdent/etcd-compute? | 18:22 |
| cdent | sean-k-mooney: https://github.com/cdent/etcd-compute I'm surprised I haven't already shown you this. | 18:22 |
| cdent | aye | 18:22 |
| cdent | big hack, but fun | 18:22 |
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| sean-k-mooney | the bigger the hack the more fun it becomes when it starts to work | 18:23 |
| sean-k-mooney | cdent: are you using etcd to store any state | 18:23 |
| cdent | etcd is used for basically two things: | 18:24 |
| cdent | message the creation or destruction of a vm (via a watcher) to a target host | 18:24 |
| cdent | store the IP of the created vm (while it exists) | 18:24 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: Extend RequestGroup object for mapping https://review.openstack.org/619527 | 18:24 |
| sean-k-mooney | its architected similar to OVN in that respect | 18:25 |
| sean-k-mooney | e.g. etcd is beign used to store teh desireds state and then distibuted workers are watching for changes and locally trying to achive teh desired state | 18:25 |
| sean-k-mooney | so rather then an imperitive workflow its declaritve | 18:26 |
| cdent | creation or destruction is based on the allocations: if they are there, create (with those resources), if not, destroy, in either case the same operation happens to placement: PUT /allocations/{uuid} | 18:26 |
| cdent | yup | 18:26 |
| cdent | it _feels_ really nice | 18:26 |
| sean-k-mooney | it _feels_ a bit like k8s | 18:27 |
| * edleafe thinks cdent has looked at k8s | 18:27 | |
| sean-k-mooney | perhaps with less yaml | 18:27 |
| cdent | yes, less yaml | 18:27 |
| cdent | my desire for using declarative messaging with vm creation predates my awareness of k8s | 18:28 |
| cdent | but k8s provided the mechanism | 18:28 |
| cdent | (awareness of the mechanism) | 18:28 |
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| sean-k-mooney | cdent: yes the mechanism was not invented by k8s but its one of the more promenet examples | 18:28 |
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| cdent | I was using similar mechanism in a tool called mcfeely back in the 90s | 18:29 |
| * cdent is so freaking old and worn out | 18:29 | |
| cdent | mcfeely was your special delivery man | 18:29 |
| artom | efried, looks like sean-k-mooney answered all your things? | 18:36 |
| sean-k-mooney | artom: we went on a bit of a tangent | 18:36 |
| sean-k-mooney | artom: but i think i answered his first question e.g. your stuff does not depend on placement and uses the ResocueTracker | 18:37 |
| sean-k-mooney | *i.e. not e.g. | 18:37 |
| artom | No, because let's be real, NUMA in placement is closer to a pipe dream than a real thing at this point (not dissing anyone, it's just a complicated thing to get working properly) | 18:38 |
| artom | efried, and the resource tracker will always remain, because it covered the use case of tracking specific individual things (CPU 0, NUMA node 1), not just quantities of resources | 18:39 |
| sean-k-mooney | artom: right and paraphasing efried main question. is nuam/cpu pinning in placments someting we can start working on/proposing specs for in train | 18:39 |
| artom | Don't see why not, I mean the spec was up for Stein | 18:39 |
| artom | It stalled, but there was no massive disagreement AFAICT | 18:40 |
| sean-k-mooney | that was mainly because we had too many other things to do in stien | 18:40 |
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| cdent | hopefully when placement is more independent, it will be more clear that nova's inability to take advantage of placement is nova's problem, not placement's | 18:46 |
| cdent | placement has been able to support a lot of this stuff for a _long_ time | 18:47 |
| cdent | but working the changes through nova is complex | 18:47 |
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| sean-k-mooney | cdent: yes but it can support plociy that chage the resouces requried dependent on the host that is selected | 18:47 |
| krasmussen | I made my first blueprint for a stopgap on subnet capacity aware scheduling via a filter that uses aggregates with keys containing subnets that are available to those hosts. Is this the correct place to ask for input on this? | 18:47 |
| sean-k-mooney | *cant | 18:47 |
| sean-k-mooney | and yes i know that by design :) | 18:48 |
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| sean-k-mooney | krasmussen: here or the nova meeting | 18:48 |
| krasmussen | https://blueprints.launchpad.net/nova/+spec/ip-aware-scheduling-aggregate | 18:48 |
| sean-k-mooney | krasmussen: the mailing list is also good however that is not ideal from a design point of view | 18:49 |
| krasmussen | Figure if I'm going to take up time in a meeting I would prefer this at least have some eyes and I can improve the POC a bit more first. | 18:49 |
| sean-k-mooney | krasmussen there is already a what of mapping host to reachable subnets | 18:49 |
| krasmussen | Where is that accessible at? | 18:50 |
| sean-k-mooney | krasmussen: are you aware of https://specs.openstack.org/openstack/nova-specs/specs/newton/implemented/neutron-routed-networks.html#neutron-routed-networks | 18:51 |
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| efried | artom: Save me looking for it, where's that stein spec for numa modeling in placement? | 18:52 |
| artom | efried, https://review.openstack.org/#/c/552924/ | 18:52 |
| efried | artom: And yes, partly because too much to do, partly because there wasn't a super big motivator for it yet, but partly because we couldn't settle on how we were going to model subtree affinity. | 18:53 |
| sean-k-mooney | krasmussen: currently neutron reporst network segments to placement and uses placemetn aggreates to assocaite them with hosts | 18:53 |
| efried | There were several ideas, but none was great, and we stopped discussing before we approached consensus. | 18:53 |
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| efried | artom: Ah, vaguely remembering that we did settle on some kind of compromise in that spec, will reread more thoroughly... | 18:55 |
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| krasmussen | I'm reading through all that now and following the rabbithole a bit. | 18:59 |
| sean-k-mooney | krasmussen: not to be deter you by the way but the blueprint freeze for stien was in january so this feature would need to be proposed for stien | 19:00 |
| sean-k-mooney | *train | 19:00 |
| sean-k-mooney | krasmussen: as a comunity we are trying to move away from using nova filters for filtering based on resocue available intead prefering ot model such constriants in placement | 19:01 |
| krasmussen | Thats fine :) just trying to get in the upstream flow here opposed to just local patches. | 19:02 |
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| sean-k-mooney | krasmussen: nova also trys not to model network backend info internally as such extending the host_state with segment/ip reachablity would be counter to the direction we have been movign over the last few cycles | 19:03 |
| krasmussen | I thought scheduler had to pick a node before getting sent to placement? Or do I have that backwards? | 19:03 |
| sean-k-mooney | krasmussen: other way around | 19:03 |
| krasmussen | So placement -> scheduler yeah? | 19:04 |
| sean-k-mooney | placement -> schduler -> claim resouce in placement | 19:04 |
| sean-k-mooney | so placement give the schduler a set of host that could work and then the shcudler chooes form that set | 19:05 |
| artom | efried, it's been so long since I looked at it that I don't remember :/ | 19:05 |
| krasmussen | Ahhh gotcha I only had the "scheduler -> claim resource in placement" in my head. I'll look into what can be done on the placement side for this and will likely abandon the BP and associated POC and look at doing it in placement instead. | 19:05 |
| sean-k-mooney | krasmussen: is your primary usecase modeling what hosts have available public ips? | 19:05 |
| artom | But yeah, that and jaypipes's CPU resources spec should be proposed for Train | 19:05 |
| krasmussen | We were seeing scheduler selecting hosts that only had access to certain subnets which were out of ips. | 19:06 |
| sean-k-mooney | krasmussen: well i think the best first step would be to write up what your usecase is and then send an email to the mailing list | 19:06 |
| krasmussen | Which is why I went down the scheduler route, we are kinda new to anything "placement" though as we moved from Liberty -> Pike for some of our newer clouds. | 19:07 |
| sean-k-mooney | krasmussen: how is you ip addressign done in the cloud? are you using routed network or ovs or something else? | 19:08 |
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| krasmussen | routed network, we used ovs before in the old environment, so again another recent change for us. | 19:09 |
| sean-k-mooney | krasmussen: right so in pike i belive the routed network work should already work. | 19:10 |
| sean-k-mooney | krasmussen: but i also think you need to set ip_allocation=defer | 19:10 |
| sean-k-mooney | krasmussen: the neuton folks would be able to confim | 19:10 |
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| krasmussen | This gives me some things to look into further, thanks a TON! | 19:11 |
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| sean-k-mooney | krasmussen: before you close your blueprit i woudl follow up on the mailing list. i will check the code when i gave time but its posibly that nova is not using the ip secments reported to placemetn by neutron in its placement query | 19:17 |
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| openstackgerrit | Merged openstack/nova master: Rip the report client out of SchedulerClient https://review.openstack.org/617042 | 19:47 |
| openstackgerrit | Merged openstack/nova master: Rip out the SchedulerClient https://review.openstack.org/617049 | 19:47 |
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| openstackgerrit | Merged openstack/nova master: Use a static resource tracker in compute manager https://review.openstack.org/620711 | 19:53 |
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| openstackgerrit | Merged openstack/nova master: FUPs: ReportClient traffic series https://review.openstack.org/633609 | 20:02 |
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| openstackgerrit | Eric Fried proposed openstack/nova master: Use :oslo-config: role in hypervisor-kvm doc https://review.openstack.org/634798 | 20:13 |
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| openstackgerrit | Artom Lifshitz proposed openstack/nova master: [WIP] Add migration param to check_can_live_migrate_destination https://review.openstack.org/634605 | 20:17 |
| openstackgerrit | Artom Lifshitz proposed openstack/nova master: [WIP] Create claims when live migrating https://review.openstack.org/634606 | 20:17 |
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| openstackgerrit | Vlad Gusev proposed openstack/nova stable/rocky: Use X-Forwarded-Proto as origin protocol if present https://review.openstack.org/634814 | 21:31 |
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| artom | sean-k-mooney, still around? Wanted to talk about https://review.openstack.org/#/c/599587/5/specs/stein/approved/numa-aware-live-migration.rst@247 - but maybe tomorrow via bjns? | 22:07 |
| artom | (22:00, that's late even for you) | 22:09 |
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| openstackgerrit | Merged openstack/nova master: Per-instance serial number https://review.openstack.org/619953 | 22:22 |
| openstackgerrit | Merged openstack/nova master: doc: Switch header styles in support doc https://review.openstack.org/626930 | 22:22 |
| openstackgerrit | Merged openstack/nova master: doc: Add solution to live migration ssh issues https://review.openstack.org/626931 | 22:22 |
| mriedem | forever in bluejeans | 22:28 |
| artom | mriedem, at least the abbreviation is "bjns" now | 22:32 |
| artom | It used to be "Are you ready for a bj?" "Can we do a bj tomorrow?" and so on and so forth | 22:32 |
| mriedem | so i've heard | 22:34 |
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| openstackgerrit | Artom Lifshitz proposed openstack/nova master: [WIP] Create claims when live migrating https://review.openstack.org/634606 | 22:46 |
| openstackgerrit | Artom Lifshitz proposed openstack/nova master: [Very WIP] New objects to transmit NUMA config from dest to source https://review.openstack.org/634827 | 22:46 |
| openstackgerrit | Artom Lifshitz proposed openstack/nova master: [Very WIP] Send dest NUMA info inside LiveMigrateData https://review.openstack.org/634828 | 22:46 |
| artom | Wow. So WIP. Very workflow. Much -1. | 22:48 |
| artom | And on that, I'm done. | 22:48 |
| artom | o/ | 22:48 |
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| openstackgerrit | Merged openstack/nova master: doc: link Kashyap's cpu model talk to the libvirt driver config docs https://review.openstack.org/634731 | 23:27 |
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| openstackgerrit | Matt Riedemann proposed openstack/nova master: WIP: Add PrepResizeAtSourceTask https://review.openstack.org/627891 | 23:33 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: Move resize.(start|end) notification sending to helper method https://review.openstack.org/634831 | 23:33 |
| openstackgerrit | Matt Riedemann proposed openstack/nova master: Add prep_snapshot_based_resize_at_source compute method https://review.openstack.org/634832 | 23:33 |
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