Tuesday, 2020-04-14

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ricolin#startmeeting multi_arch15:06
openstackMeeting started Tue Apr 14 15:06:31 2020 UTC and is due to finish in 60 minutes.  The chair is ricolin. Information about MeetBot at http://wiki.debian.org/MeetBot.15:06
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:06
*** openstack changes topic to " (Meeting topic: multi_arch)"15:06
openstackThe meeting name has been set to 'multi_arch'15:06
ricolin#topic roll call15:06
jeremyfreudbergo/15:06
ricolino/15:06
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ricolinjeremyfreudberg, how's everything15:07
jeremyfreudbergi'm doing alright15:07
ricolin#topic open discussion15:07
*** openstack changes topic to "open discussion (Meeting topic: multi_arch)"15:07
ricolinany update from you?15:08
jeremyfreudbergricolin: not really :(15:09
jeremyfreudbergi am always getting pulled into other tasks15:09
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ricolinit happends:)15:10
ricolin*happens15:10
ricolinFor CI, the devstack part is still under debug15:11
ricolinit tooks longer than we though15:11
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ricolinand on kubernetes/openstack-cloud-provider, support for multi-arch is there15:12
jeremyfreudbergricolin: cool15:13
ricolinno update for wheels and unit test part, since I missed meeting earlier today:(15:13
ricolinwill catch up with tonyb and ianw15:14
jeremyfreudbergyup15:14
jeremyfreudbergok thanks ricolin for the quick meeting, i can let you go do other important things now :)15:14
ricolinjeremyfreudberg, yeah, things eat times:(15:15
ricolinwill keep thing update later15:15
ricolinjeremyfreudberg, thanks for join,15:16
ricolin#endmeeting15:16
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"15:16
openstackMeeting ended Tue Apr 14 15:16:15 2020 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:16
openstackMinutes:        http://eavesdrop.openstack.org/meetings/multi_arch/2020/multi_arch.2020-04-14-15.06.html15:16
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/multi_arch/2020/multi_arch.2020-04-14-15.06.txt15:16
openstackLog:            http://eavesdrop.openstack.org/meetings/multi_arch/2020/multi_arch.2020-04-14-15.06.log.html15:16
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clarkbreminder the opendev infra team meeting is happenign in #opendev-meeting now19:02
clarkbif you are here looking for that meeting you'll want to join that other channel19:02
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oneswig#startmeeting scientific-sig21:00
openstackMeeting started Tue Apr 14 21:00:27 2020 UTC and is due to finish in 60 minutes.  The chair is oneswig. Information about MeetBot at http://wiki.debian.org/MeetBot.21:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.21:00
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openstackThe meeting name has been set to 'scientific_sig'21:00
oneswigHi21:00
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martialHello friends21:01
oneswigHey martial21:01
oneswig#chair martial21:02
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openstackCurrent chairs: martial oneswig21:02
martialHey Stig :)21:02
oneswighow are you?21:02
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martialdoing well, enjoying a ton of work so the usual :)21:02
oneswigStrangely work for some is much, much higher!21:04
oneswigKeeping me busy, for sure.21:04
martialoh yeah21:04
martialit is crazy here too21:04
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oneswigawfully quiet today...21:06
martialthings going well otherwise? Seems like it is going to be another slow SIG meeting21:06
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rbuddenhello :)21:06
oneswigWell yes, I think so.21:06
oneswighey Bob21:06
rbuddenhey Stig, how’s it goin?21:07
oneswigBored :-)21:07
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oneswigAny news on that issue with Cinder, Nova and backends in various AZs?21:09
rbuddenyes, we’ve got the multi AZ pieces all working for the most part21:10
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rbuddena few weird nuances ATM, but nothing that appears to be a show stopper for our future setup21:10
oneswigLuxury :-) I've been having fun with giving some cranky old hardware a second life.21:12
rbuddenthe strangest is that since Nova through CLI/Horizon has no way of passing a Cinder volume type, it appears that Cinder selects the right backend based on AZ, but assigns it ‘__DEFAULT__’ as the type instead of the choice it made21:13
oneswigI've seen that volume type before... pretty annoying and that's without AZs in the mix21:14
rbuddenit’s been interesting digging into some of this, i’m not sure if many others have done multi AZ setups w/Nova, Cinder, and Neutron21:15
rbuddenit’s almost like there needs to be a default volume type per AZ21:15
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smcginnisThe workaround in horizon is to create the volume first, then use that to create a new instance. Unfortunately.21:16
rbuddenor have Nova be smart enough to pass the volume type21:16
oneswigHi smcginnis, thanks for that :-)21:16
rbuddenyes, that does work21:16
rbuddensadly, it requires our users to actually read the documentation to know to peform that step ;)21:17
rbuddenwe’ve used the same workaround on the CLI for the moment as well21:17
oneswigThe inevitable follow-up question is why?  Seems like the sort of usability issue the UC ought to have been chipping away at.21:17
smcginnisIf you have default_availability_zone set in cinder.conf, that should prevent "__DEFAULT__" from being used. But that only helps for that one type.21:18
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oneswigIs it that the APIs don't support this level of specification, and can't be extended to add it?21:18
rbuddenif you have a default set, then you can never get a nova boot to pick a cinder volume type in the non-default AZ21:19
rbuddencinder-api effectively applies the default volume type before it sends the request to the scheduler21:19
smcginnisoneswig: In the past, we did push for nova being able to send that to cinder in the volume creation request, but the team had been acitively trying to get away from orchestrating non-Nova API workflows. So it was shot down multiple times.21:19
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smcginnisOne suggestion I gave in the past was to add the smarts to horizon, so internally it could orchestrate creating the volume, then using it for the instance. Not sure if there is a reason why that couldn't be done.21:20
oneswigThanks for the helpful context21:21
rbuddenFWIW this problem also exists with just Cinder CLI outside of Nova21:21
smcginnisNo great answers, but at least some background.21:21
rbuddenyep, appreciate the info21:21
smcginnisrbudden: Not sure what you mean. You can specify volume type from the Cinder CLI.21:21
rbuddenright, i’m saying if you want to create a new volume based on AZ and not volume type, you get the same experience as with the Nova boot (i.e. Nova passing ‘None’ as the volume type)21:22
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rbuddenso if you do a ‘cinder create —availability-zone $az …’ without specifying a type, you traverse the same code path Nova does where the Cinder scheduler does pick the right volume type, and creates the volume, but ends up with type being ‘__DEFAULT__’ regardless of which backend it landed on21:23
smcginnisYeah, everything is driven off of volume types to determine where to create volumes. So if the type isn't given, it will always use the default volume type and place it wherever that goes.21:23
rbuddenyep, that’s what it looks like. it does appear to have enough logic that if no default is set, it works, with the above issue21:24
rbuddenoperationally it works, so that makes me happy21:24
oneswigrbudden: so you have users following the two-stage workflow?21:25
rbuddenno, not at the moment21:25
rbuddenwe’re trying to avoid that21:25
rbuddenthis workaround is in our TDS21:25
rbuddenour current production cloud is single AZ and single Cinder backend, so it doens’t have these21:26
rbuddenissues21:26
rbuddenwhen we merge our two clouds we will end up with at least one AZ per buliding, maybe more, and at least one Cinder volume backend per building21:26
rbuddenthe main idea is to prevent the need (and peformance loss) of doing Cinder cross-az-attach21:29
smcginnisLooking at the cinder code, I think you are right that there is a bug in how --availability-zone gets passed in.21:30
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oneswigInteresting to know.21:33
rbuddenso yeah, that’s where i’m at with things ATM. been fun digging through code though :)21:38
oneswigrbudden: It's always fun, until you have to do it because it's preventing you from doing what you really wanted to do...21:39
rbuddenhaha, it’s still fun then as long as you eventually find a solution in a timely fashion ;)21:40
rbuddenluckily right now the entire point of our TDS is to flesh out these issues now21:40
oneswigDone by the book!21:41
rbuddenwe’re still hacking through Monasca/Ceilosca/CloudKitty21:42
rbudden@oneswig we may pick your brain some more if you don’t mind21:42
oneswigAny luck with tying together Monasca and CloudKitty?  I think Pierre got some useful pointers21:42
rbuddenyes, we’re getting closer21:42
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rbuddenstill a disconect or two, but I’d have to defer to Jonathan on much of that work21:43
oneswigrbudden: brain-picking more than welcome, what's left of it...21:43
rbuddenI need to catch up to him in the Telemetry department21:43
rbuddenwe’ve appreaciate the help thus far!21:46
oneswigYou're welcome - in return I'd be interested hearing if you finesse things with the AZs in due course :-)21:47
rbuddenabsolutely21:47
martialBob, be ready to present :)21:51
rbuddenalready have some plans to present when our new setup is opperational21:52
oneswigPresent here or somewhere fancier? :-)21:52
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rbuddenwas hoping Germany Summit, but who knows these days ;)21:52
oneswigThe SIG beers in Berlin last time - have to do that again...21:53
rbuddenmaybe once this COVID-19 is al over i think i need to replan that long lost trip to visit you Stig21:54
rbuddeni’ve never been to Germany, but it’s been on my bucket list21:54
rbudden*Crosses fingers*21:54
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oneswigAny time, rbudden, except for now alas21:55
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martialKind of hoping Berlin will be a go too21:56
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oneswigLikewise!21:56
oneswigOK, nearly at the hour. AOB?21:58
oneswigWe are planning for our first CentOS 8-based deployment, maybe kicking off next week all going to plan.21:58
rbuddenvery nice. i’ll be interested in how this goes!21:59
rbuddenwe’ll be toying with CentOS 8 at some point in our TDS as well, but not on the immediate horizon21:59
oneswigMe too. It's been well tested upstream so I'm hoping relatively smoothly.21:59
oneswigCeph Octopus too22:00
oneswigOn that happy note, final comments?22:00
oneswig#endmeeting22:00
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"22:00
openstackMeeting ended Tue Apr 14 22:00:37 2020 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)22:00
openstackMinutes:        http://eavesdrop.openstack.org/meetings/scientific_sig/2020/scientific_sig.2020-04-14-21.00.html22:00
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/scientific_sig/2020/scientific_sig.2020-04-14-21.00.txt22:00
rbuddenappreciate chatting! have a great week everyone!22:00
openstackLog:            http://eavesdrop.openstack.org/meetings/scientific_sig/2020/scientific_sig.2020-04-14-21.00.log.html22:00
oneswigHave a good one!22:00
rbuddenstay safe everyone!22:01
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oneswigSame to you rbudden22:01
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