Wednesday, 2019-10-23

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janders g'day Stig11:16
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liuyulong#startmeeting neutron_l314:00
openstackMeeting started Wed Oct 23 14:00:12 2019 UTC and is due to finish in 60 minutes.  The chair is liuyulong. Information about MeetBot at
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.14:00
*** openstack changes topic to " (Meeting topic: neutron_l3)"14:00
openstackThe meeting name has been set to 'neutron_l3'14:00
liuyulong#chair liuyulong_14:00
openstackCurrent chairs: liuyulong liuyulong_14:00
liuyulong#chair haleyb14:00
openstackCurrent chairs: haleyb liuyulong liuyulong_14:00
liuyulong#chair slaweq14:00
openstackCurrent chairs: haleyb liuyulong liuyulong_ slaweq14:00
liuyulongJust in case...14:00
liuyulong#topic Announcements14:01
*** openstack changes topic to "Announcements (Meeting topic: neutron_l3)"14:01
liuyulongI received the QR code of the Shanghai Summit ticket on Tuesday.14:02
liuyulongMaybe you guys may also have that now.14:02
liuyulongSo only one important thing is see you guys in Shanghai.14:03
liuyulongAnd I'd like to cancel the L3 meeting next week, because we will have totally three day times to discuss things in the PTG meetings.14:04
haleyb+1 from me14:04
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liuyulongOK, that's all from me about the announcement.14:05
liuyulongOK, let's move on.14:06
liuyulong#topic Bugs14:07
*** openstack changes topic to "Bugs (Meeting topic: neutron_l3)"14:07
liuyulongHongbin was our bug deputy last week, and thanks.14:07
liuyulongFirst one14:08
openstackLaunchpad bug 1848187 in neutron "DHCP agent timing out spawning dnsmasq" [Medium,In progress] - Assigned to Will Szumski (willjs)14:08
* slaweq is just lurking here14:09
liuyulongThe patch is abandoned,
liuyulongSeems the root cause is still unclear.14:10
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liuyulongSo let's wait to see if the bug reporter can supply more details as slaweq requested.14:12
slaweqIMO this bug can be closed now, it was the issue with ulimits in containers AFAIU14:13
slaweqI don't think we should do anything with that on Neutron's side14:13
liuyulongOne interesting thing is that we disable the root-wrapper-deamon for DHCP-agent also, it will have a better performance during processing networks.14:16
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liuyulongslaweq, so you have the right to disable it right now, :)14:16
openstackLaunchpad bug 1848738 in neutron "Sometimes dnsmasq may not be restarted after adding new subnet" [Medium,In progress] - Assigned to Slawek Kaplonski (slaweq)14:16
liuyulongThe fix is getting merged.14:17
liuyulongSo thank you slaweq for the fix.14:17
slaweqliuyulong: about which fix You are now talking about?14:17
liuyulongslaweq, this one 184873814:18
slaweqahh, it's still in the gate14:18
slaweqnot merged yet14:18
slaweqand it is only partial fix14:18
slaweqI will still have to investigate why this happens sometimes that dnsmasq isn't restarted when it should be14:18
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liuyulongwe met some DHCP agent issues locally in stable/queens. There will be one race condition between R/W of the DHCP agent resource cache.14:21
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liuyulongAnd finally cause the port processint timeout, or the IP/mac info of the dnsmasq config failed to install.14:22
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liuyulongI mean the DHCP related processing, aka config the dnsmasq for DHCP.14:23
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liuyulonguse_helper_for_ns_read = False and root_helper_daemon= can also be used for DHCP agent.14:24
liuyulongOK, let's scan the LP bug list.14:25
openstackLaunchpad bug 1849392 in neutron "Neutron - Stein - Having two external networks will prevent the router from being created." [Undecided,New]14:25
slaweqthat one is confusing me as I though we already fixed it some time ago14:26
slaweqso I plan to take a look into that ASAP14:26
liuyulongslaweq, cool14:26
liuyulongslaweq, master branch does not have such issue, right?14:27
slaweqliuyulong: I don't know14:27
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slaweqif so, it would mean that we just missed some backport14:27
slaweqI will check that14:27
liuyulongslaweq, Exactly14:28
openstackLaunchpad bug 1847763 in neutron "cannot reuse floating IP as port's fixed-ip" [Undecided,Incomplete]14:30
liuyulongThis looks like not the Neutron bug.14:31
liuyulongThe new port was using that floating IP address.14:31
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liuyulongMore like a guest DHCP client config issue, something like NetworkManager, Cloud-init or network-scripts.14:32
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liuyulongOne more strange thing we noticed locally is, the external network is have a empty DHCP schedule entry in the DB no matter the enable-dhcp is True or False.14:34
liuyulongAnd this bug is more like that, the DHCP is enabled for external network floating IP subnet.14:35
haleybliuyulong: the DB entry for the network has dhcp blank?14:35
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liuyulonghaleyb, yes, in stable/queens we noticed that.14:36
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liuyulongneutron dhcp-agent-list-hosting-net <external-network-id>, you will see an schedule instance.14:37
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liuyulongno matter enable dhcp or not.14:38
liuyulongI'd like to ask if we could add some config to disable such DHCP behavior for external network by default.14:39
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haleybi guess that should be Ok14:39
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liuyulongIf someone wants to enable, or boot VM in external network, they should change that config to clearly know what they are doing.14:40
liuyulongOK, that's all bugs from me.14:41
ralonsohI have one moew14:41
liuyulongAny additions?14:41
ralonsoh(one sec)14:42
liuyulongralonsoh, sure, please go ahead.14:42
openstackLaunchpad bug 1849502 in neutron "[DHCP] Check the dnsmasq process status after enabling the process" [Undecided,New] - Assigned to Rodolfo Alonso (rodolfo-alonso-hernandez)14:42
ralonsohjust a heads-up14:42
ralonsohfilled 10 mins ago14:42
ralonsohbut I think I have the solution14:42
ralonsohI'll push the patch today14:42
ralonsohthat's all14:42
* liuyulong reading...14:42
ralonsohlong story short: dnsmasq started with 1 subnet14:43
ralonsohnetwork updated with 2 more subnets14:43
ralonsohthe dhcp agent do not find the process (when stopping it) and then, when starting it, the process is active (so the agent do not start ir again)14:44
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liuyulonglooks a bit like the race condition I just mentioned in the meeting. ^^^14:45
liuyulongdata inconsistence between agent and neutron DB.  : )14:45
ralonsohkind of14:46
haleybralonsoh: is this related to the other bug slaweq was fixing with tags too?14:46
ralonsohthe DB is ok in this case14:46
ralonsohhaleyb, not exactly14:46
ralonsohIMO, the tags patch is not needed14:46
ralonsohbut I left a comment on it14:46
ralonsohmaybe i'm missing something in this patch14:46
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liuyulong"Sometimes dnsmasq may not be restarted after adding new subnet" this is the bug title reported by slaweq.14:48
liuyulongbug 184873814:48
openstackbug 1848738 in neutron "Sometimes dnsmasq may not be restarted after adding new subnet" [Medium,In progress] - Assigned to Slawek Kaplonski (slaweq)14:48
haleybthe tags patch makes things a little simpler, with the subnet-id in the tag14:48
ralonsohI know, but I don't think the patch solves this problem14:48
ralonsohat least the one described in my  bug14:48
ralonsohthe problem I found is not related with the tags14:49
ralonsohbut with detecting or not the status of the dnsmasq process (running or not)14:49
liuyulongOK, so you have any reproduce steps?14:50
ralonsohkind of14:50
ralonsohwe have an automated deployment system, using tripleo14:51
liuyulongI could not open the site pastebin.test.redhat.com14:51
liuyulongMay you use the
ralonsohWhen using several subnets (and segments), this bug occurs14:51
ralonsohsure, I'll change the links14:51
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liuyulongralonsoh, we are running out of time, so please add some reproduce step in the bug or pastebin, we can test it locally.14:54
liuyulongNext topic14:54
liuyulong#topic On demand agenda14:54
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liuyulongI'd like to update some IPv6 test status.14:54
liuyulongOne thing is that we will not use SLAAC for ipv6 subnets.14:55
liuyulongBecause for multiple ipv6 subnets in one network14:55
liuyulongThe created port will have all IPv6 subnets address automatically by default.14:56
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liuyulongWe can change the neutron DB code to let it have one IP only, but the router RA advise will send out randomly.14:57
liuyulongSo the IPv6 prefix may be wrong with the port real IPv6 address.14:57
haleybliuyulong: the RA should have both prefixes, correct?14:57
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liuyulongInside the VM14:58
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liuyulonghaleyb, yes, it will14:58
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haleybi guess i don't understand the issue yet14:59
haleybbut we are out of time15:00
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liuyulongOK, I will create a bug for detail.15:00
*** openstack changes topic to "OpenStack Meetings ||"15:00
openstackMeeting ended Wed Oct 23 15:00:26 2019 UTC.  Information about MeetBot at . (v 0.1.4)15:00
openstackMinutes (text):
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rosmaitajungleboyj whoami-rajat rajinir lseki carloss pots woojay erlon geguileo eharney rosmaita enriquetaso e0ne smcginnis davidsha walshh_ xyang hemna _hemna tosky sfernand15:59
geguileohi! o/16:00
rosmaita#startmeeting cinder16:00
openstackMeeting started Wed Oct 23 16:00:03 2019 UTC and is due to finish in 60 minutes.  The chair is rosmaita. Information about MeetBot at
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.16:00
*** openstack changes topic to " (Meeting topic: cinder)"16:00
openstackThe meeting name has been set to 'cinder'16:00
rosmaita#topic roll call16:00
*** openstack changes topic to "roll call (Meeting topic: cinder)"16:00
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geguileorosmaita: hi there :-)16:00
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_pewp_jungleboyj (◍˃̶ᗜ˂̶◍)ノ”16:00
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rosmaitalooks like a good turnout!16:01
eharney needs an update (this is still how i find the etherpad half the time)16:01
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rosmaitai thought i had updated that16:01
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rosmaitawell, speaking of updates16:02
rosmaita#topic updates16:02
*** openstack changes topic to "updates (Meeting topic: cinder)"16:02
eharneyer.. Ussuri is there.  maybe i found a very old browser tab...16:02
rosmaitajust a few announcements16:02
rosmaitathe final releases from stable/queens happen sometime between now and tomorrow16:03
rosmaitaand then stable/queens goes into 'extended maintenance' status, which means no more releases, but we can backport fixes16:03
jungleboyjSounds good.16:03
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rosmaitathe idea is that some distros/packagers may want to do releases including new bugfixes, even if we (opensatck) aren't committed to doing it16:04
rosmaitaalso, we had talked about doing monthly releases from the stable branches16:04
rosmaitaover the past half year, it's looking like every 2 months is fine16:04
rosmaita(and we can always do a release at any time if there's a critical/security bugfix)16:05
smcginnisextended maintenance ends up being pretty close to our driverfixes branches.16:05
smcginnisSounds good to me on the stable release cadence.16:05
rosmaitayes, and on that note, here's a picture of what we've got open branch-wise:
rosmaitai don't have anything to say, other than it's a lot of open branches!16:06
rosmaitaok, two final things16:06
eharneymitaka is still "Supported" :)16:06
rosmaitayes, i wonder if we should think about unsupporting some of those16:07
jungleboyjIs anything before Mitaka actually still hopen?16:07
rosmaitano, i think that's the earliest open branch16:07
jungleboyjOk.  Maybe we should update that then.16:07
smcginnisI think because that's where we started the driverfixes thing.16:07
eharneysmcginnis: right16:08
smcginnisI think it's been long enough. I'd like to get rid of M and N at least.16:08
jungleboyjsmcginnis:  ++16:08
smcginnisI think we could even decide to EOL ocata and maybe pike.16:08
eharneyM, sure.  N... i dunno16:08
rosmaitathat's what i was going to ask, what do we need to do to EOL a branch?16:08
smcginnisRealistically, I don't think we will be paying much attention past queens.16:09
smcginnisrosmaita: We would need to make sure all open reviews are closed. Then propose a $series-eol tag to the branch.16:09
rosmaitai wonder if we should convert to driverfixes only for n and o ?16:10
smcginnisI think we may need to also ask infra to delete the stable/$series branch too, just to make it clear.16:10
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eharneyN is already eol, so i think it is already driverfixes only16:11
smcginnisI think we're better staying at -em than adding a driverfixes branch. It's more "understood" now.16:11
jungleboyjsmcginnis:  ++16:11
rosmaitaeharney: you are right about N16:12
smcginnisWell, N isn't tagged eol and the status is still set as Supported in Launchpad.16:12
eharneythere's a newton-eol tag in git..16:12
smcginnisAh, ok.16:12
rosmaitawell, the supported status is just me, i left that so we could target bugs to the driverfixes branch16:13
eharneymakes sense16:13
rosmaitaso with o & p, we could eol or we could have a stable-maint driverfixes only policy for those branches16:14
rosmaitathe drivers don't seem to change so much (not as much as cinder itself), so backports wouldn't be too bad for serious bugs16:15
smcginnisThe tricky part with these is keeping tests going.16:15
smcginnisI think Mitaka and Newton might actually be effectively broken at this point.16:16
rosmaitathat';s true16:16
toskyat least ocata would be good (it's harder to maintain, as it was caught in the early extended maintenance process and some zuul v3 jobs-related improvements can't be applied there)16:16
eharneywe're still actively supporting OSP10 so we have an interest in Newton fixes... i'm not sure if anyone is going to consume fixes for ocata & pike or not16:16
toskyit would be good to switch it to unmaintained, I mean16:16
eharneyer  s/OSP10/Newton/16:16
smcginnisI think with driverfixes we said just pep8 and py27. That just requires tox based jobs, so I think we can drop any legacy jobs there.16:17
smcginnisProbably any extended maintenance branches if we really need to.16:17
jungleboyjMakes sense.16:17
rosmaitaok, that's good to keep in mind16:18
smcginnisBut good to keep broader testing around for the newer branches if/when we can.16:18
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rosmaitaso would it look weird if we kept driverfixes/newton but eol'd o and p?16:18
rosmaitathat's what i thought16:19
jungleboyjYeah, because we shouldn't be backporting to Newton without hitting O and P.  Right?16:20
smcginnisYeah. Even for just driver fixes.16:20
eharneythat's questionable if we decide O&P don't exist anymore16:20
smcginnisIf we do that, then N goes too.16:20
toskywhat about moving o (and maybe p) to driverfix for now, and think more about it?16:21
rosmaitawell, we'd be hitting all open branches if we skip o & p and backport to N16:21
smcginnisWe can't drop newer ones and keep older ones.16:21
smcginnisEither we keep through to the older one we want, or we cut them off.16:21
rosmaitaok, but we could adopt the "driverfixes only" policy for them16:22
rosmaitai think what i'd like to do is circulate something on the ML [cinder][ops] and see what people are using16:23
rosmaitaand we can make a decision at the ptg16:23
rosmaitabasically, what tosky said16:24
rosmaitagood segue to the next announcement16:24
rosmaitai'll add possible eol to the etherpad16:25
rosmaitabut if anyone has a topic they'd like to see addressed, please add it!16:25
rosmaitaand it looks like i skipped something16:26
rosmaitai just wanted to mention the U community goals proposals, in case anyone has a strong feeling16:26
smcginnisThere are mailing list threads looking for goal champions for some of these. If anyone really wants to work on any of that.16:27
rosmaitai think that's all, except a reminder about adding yourself to the courtesy ping list at the top of the agenda if you want a ping at meeting time16:27
jungleboyjrosmaita:  ++ The new ping list is rather small right now.16:27
rosmaitayeah, tbh, i was mentioning it mainly in case anyone saw a community goal that would be a real PITA for cinder!16:27
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rosmaita#topic leftover file locks16:28
*** openstack changes topic to "leftover file locks (Meeting topic: cinder)"16:28
rosmaitageguileo: this is you16:28
geguileorosmaita: thanks16:28
geguileomostly I just wanted to confirm that everyone was onboard with the proposed solution in the ML16:29
geguileothis is about how cinder ends up leaving a lot of lock files16:29
geguileoeven when they are no longer necessary16:29
smcginnisSounded like you had most scenarios covered that we could cover.16:29
eharneythat solution being, having cinder code selectively remove the more commonly leaked files?  or cleaning it on node startup?16:30
geguileowell, Cinder wouldn't clean them up on start16:30
geguileobut like you say it would be on node startup16:30
jungleboyjThe safest thing to do is cleanup on startup.  Right?16:30
geguileoand that would be the responsibility of the deployment tool16:30
geguileojungleboyj: yeah, but not Cinder (in case we are sharing the location)16:30
jungleboyjgeguileo: ++16:30
geguileoso the idea is that the installer creates a service unit that cleans up the directory16:31
geguileoand makes all openstack services depend on that one16:31
geguileothat way there are no races between removal and services using them16:31
toskyuhm, would it work if you restart just one service?16:31
geguileoand in cinder we do our best to do the clean16:31
geguileotosky: no, because systemd would not retrigger the other unit16:32
geguileofor example, the cinder-volume service would depend on the remove-locks unit having run before16:32
geguileoand since it run at the start of the node16:32
geguileothere is no problem and won't be retriggered16:32
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geguileo^ that's the ML thread16:33
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geguileoand this is a wip patch for the Cinder side of things16:33
geguileothe cinder side basically uses oslo's lock removal feature to remove them when deleting volumes or snapshots16:33
geguileoand if the create volume from source fails as well16:34
rosmaitaso this is a dumb question, but why don't we stop using file locks and use etcd-backed-tooz all the time, not just for active-active?16:34
geguileothat's slower16:35
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eharneyjust the cinder patch will cover most of these files, right, even without the other cleanup?16:35
geguileoand etcd is not a requirement to run cinder16:35
geguileoeharney: yes, it should, but not for existing files16:35
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eharneythat's not so bad since the main issue these cause is admins saying "why are all these files in here?"16:35
geguileoso the cleanup on node start is kind of a failsafe16:35
geguileoin case we missed something it would be good to have the cleanup on start as well16:36
geguileobut I think this patch would be a reasonable compromise16:36
geguileoit may not fix everything, but at least is better than nothing  XD16:37
jungleboyjIt would at least slow the future growth in the number of files.16:37
rosmaitawell, it's definitely better than fixing too much (and breaking something)16:37
jungleboyjSo, I agree that it is better than nothing.16:37
geguileoI wanted to confirm that we all agreed on this solution16:37
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eharneyit sounds good to me16:37
geguileothen I'll write the unit tests and all that stuff16:37
smcginnisThanks geguileo16:38
rosmaitait sounds good to me16:38
jungleboyjgeguileo:  Sounds good.  Thank you!16:38
geguileogreat, then that's all I had to say  :-)16:38
geguileosmcginnis: jungleboyj np16:38
rosmaitathanks, geguileo16:38
rosmaita#topic request to change weekly meeting time16:39
*** openstack changes topic to "request to change weekly meeting time (Meeting topic: cinder)"16:39
rosmaitai pulled this from the PTG etherpad, since i think it needs discussion beyond people who will be in shanghai16:39
rosmaitathe request is to move the meeting 1 to 2 hours earlier16:39
smcginnisThat would make it worse for west coast folks.16:40
smcginnisBut I'd be curious to see if we would actually get more participation from APAC.16:40
rosmaitawe don't need to decide this now16:40
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rosmaitabut i wanted people to give it some thought16:40
jungleboyjWho was it that requested this?16:40
rosmaitaand also about how we would best decide16:41
rosmaitaLiang Fang16:41
jungleboyjOk.  Well, I am open to it if there is enough additional participation.16:41
geguileofor Europe I think it would be probably better16:41
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rosmaitaother than hemna part-time, do we have any west coast US people these days?16:42
smcginnisI know other teams have done alternating times, but I'm honestly not a big fan of that.16:42
rosmaitaapologies to abishop, if forgot he moved16:42
jungleboyjsmcginnis:  Yeah, that ends up being a mess.  I hate to say it.16:42
jungleboyjoh, I didn't know abishop was west coast now.16:42
enriquetasofor Latin America it would be better too.16:43
woojayI'm ok w/ earlier though.16:43
smcginnisrosmaita: Have you checked if the channel is open earlier?16:43
rosmaitayeah, we tried the alternating times with Glance a few years ago, and what happened was that everyone always had the week wrong16:43
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jungleboyjrosmaita: ++16:43
rosmaitasmcginnis: i wasn't worried about that, figured we could use the cinder channel if we have to16:43
jungleboyjOr things had to be repeated twice.  That was the way it was for Swift.16:43
rosmaitawoojay: how much earlier could you comfortably go?16:44
rosmaitanamely, 1 or 2 hours16:44
jungleboyjI am more likely to have clashes because that is when China schedules meeting wtih me.  :-)  But since I am not running things that is less concerning.16:45
rosmaitai am guessing 1 because once daylight savings time is over, it will be 2 hours16:45
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woojay2 hours no problem.16:45
jungleboyjwoojay:  Is an early riser?16:45
smcginnisReminder for everyone that the time shifts in two weeks if you are in the US.16:46
woojaymy boys get up early... 8-)16:46
rosmaitaand in 1 week for most of europe16:46
smcginnisAnd not in one of those enlightened sections that actually doesn't observe DST. :)16:46
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toskyand next week if you are in Europe16:46
smcginnisSunday it would appear.16:47
rosmaitaok, well i just wanted to float that ... sounds like at least for the people here today, it's possible16:47
rosmaitashould i send out an email for comments?16:48
jungleboyjYeah.  Could make it work.  Do it on a trial basis maybe.16:48
geguileorosmaita: an email for comments would be good16:48
rosmaitaok, i'll put out an email and figure that anyone violently opposed will respond16:48
jungleboyjOk.  Sounds good.16:49
rosmaita#action rosmaita email about possibly changing weekly meeting time16:49
rosmaita#action rosmaita email about possible EOL of some branches16:49
rosmaita(before i forget)16:49
rosmaita#topic open discussion16:49
*** openstack changes topic to "open discussion (Meeting topic: cinder)"16:49
abishoprosmaita, et al: yeah I'm on US west coast, but work east coast hours so I'm OK if mtg moves16:50
rosmaitaabishop: ty, good to know16:50
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jungleboyjOh, do you want to mention the Cinder Dinner?16:50
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rosmaitawhat day were we thinking?16:50
jungleboyjThursday I think?16:51
jungleboyjThere is talk of an RDO event Wednesday night now.16:51
rosmaitaok, we are going to plan to have a cinder team dinner in Shanghai16:51
smcginnisWouldn't it break tradition if we didn't schedule our team dinner at the same time as a Red Hat company party?16:51
jungleboyjsmcginnis:  ++16:52
rosmaitawe are still working on time/location, but expect around dinnertime and in Shanghai16:52
* jungleboyj laughs16:52
davee__I will get Chinese Takeout and wish I was there16:52
jungleboyjdavee__:   He he16:52
rosmaitadavee__: ++16:52
jungleboyjI forgot to e-mail my co-workers yesterday for ideas.16:53
jungleboyjI will do that now.16:53
smcginnisMaybe in exchange for moving the meeting earlier, Liang Fang could make a dinner reservation for us. :D16:53
rosmaitaok, we will keep the PTG etherpad updated16:53
rosmaitasmcginnis: that is not a bad idea16:53
jungleboyjsmcginnis:  No Quid Pro Quo !16:53
smcginnisHaha, was just going to say something like that jungleboyj ;)16:53
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rosmaitawhat good is a quid if you don't have a quo?16:54
rosmaitaalso, you don't have to be at the PTG to attend, just need to be constructively interested in Cinder and in Shanghai16:54
jungleboyjrosmaita:  ++16:54
rosmaitajungleboyj: i am not going to look, your gphs are always a time sink16:55
geguileorosmaita: ++16:55
jungleboyjBwah ha ha!16:55
rosmaitaanything else on anyone's mind?16:55
davee__that jungleboyj staged that for the giphy!16:56
jungleboyjrosmaita:  You are planning that I will do the project onboarding again?16:56
rosmaitajungleboyj: yes, i was, though i may be confusing that with the upstream institute16:57
rosmaitaare we supposed to schedule project onboarding as part of PTG time?16:57
jungleboyjIt is the Cinder specific part of the Upstream Institute.16:57
jungleboyjrosmaita:  Yes, so I was going to plan to do that early on Thursday as I will be in TC meetings on Friday.16:57
rosmaitayes, then i am definitely counting on you, i don't arrive until late monday16:57
jungleboyjrosmaita:  But it does happen as part of the PTG.16:58
rosmaitalet's talk about this real quick in the cinder channel after the meeting16:58
jungleboyjrosmaita:  ++16:58
rosmaitafinal minute ... any last concerns?16:59
rosmaitaok, thanks everyone!  see you next week16:59
geguileothanks everyone!16:59
jungleboyjThanks!  Talk to you all later.17:00
rosmaitai lost my etherpad tab and forgot the end meeting thing17:00
*** openstack changes topic to "OpenStack Meetings ||"17:00
openstackMeeting ended Wed Oct 23 17:00:17 2019 UTC.  Information about MeetBot at . (v 0.1.4)17:00
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timburke#startmeeting swift21:00
openstackMeeting started Wed Oct 23 21:00:05 2019 UTC and is due to finish in 60 minutes.  The chair is timburke. Information about MeetBot at
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.21:00
*** openstack changes topic to " (Meeting topic: swift)"21:00
openstackThe meeting name has been set to 'swift'21:00
timburkewho's here for the swift meeting?21:00
timburkei know tdasilva won't be able ot make it21:01
rledisezalecuyer won't be present neither21:02
timburkeand i'm guessing clayg won't either21:02
timburkeso let's begin!21:02
timburkei can make it quick so mattoliverau and kota_ can get on with breakfast ;-)21:02
timburkeagenda's at
timburke#topic Shanghai21:03
*** openstack changes topic to "Shanghai (Meeting topic: swift)"21:03
timburkeit's getting so close now!21:03
timburkei know clay's got his visa squared away, and i got mine a couple weeks ago21:03
timburkerledisez and kota_, can't wait to see you guys there! mattoliverau, you will be missed!21:04
mattoliverauSorry I won't make it.21:04
timburkeno worries -- if there's anything you'd like us to talk about, feel free to put it on the etherpad and i'll do my best to represent you (short of doing voices)21:05
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timburkemain thing for this was to just keep highlighting the etherpad21:06
timburke#topic stable release21:06
*** openstack changes topic to "stable release (Meeting topic: swift)"21:06
timburkewe have a new swift!21:07
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timburkethis is to make sure that our py3 support is the best we can make it. this cycle in particular, i'm going to try to be aggressive in backporting, *especially* for py3 fixes21:08
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kota_sounds good21:08
timburkebut having said that, i'm also working on getting stable releases together for stein, rocky, and even queens if i can hurry up ;-)21:09
timburkehence the flurry of patches i've proposed lately21:09
timburkei think stein is about ready; if anyone wants to take a look at the authors/changelog and check that i didn't miss anything, i'd appreciate it21:10
timburkeon to updates!21:11
timburke#topic object versioning21:11
*** openstack changes topic to "object versioning (Meeting topic: swift)"21:11
timburkequick recap: we've got three patches we're working on: one to add the null namespace, one to add a new versioning mode, and one to get s3api to use it21:12
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timburkethe s3api patch had fallen behind for a while, but we recently got it rebased on top of the new versioning mode -- with all the functests passing!21:13
timburkeprobably means we need to write more tests ;-)21:14
timburkeclay's recently gotten the versioning patch rebased on the null-namespace one21:14
timburkei'm pretty sure by shanghai we'll have a pretty solid patch chain with tests passing and everything21:15
timburkewhich should be handy reference as we discuss the design and implementation with kota_ and rledisez :-)21:15
timburkeone of the recent developments with the namespace patch is that we decided that any reserved name must start with a null byte -- effectively partitioning the namespace so we've got all reserved names, followed by "normal" user names21:17
timburkethis allows us to avoid a lot of the problems with delimiters and figuring out whether a "subdir" entry ought to appear when there's a mix of reserved and user-accessible names21:18
timburkethat's the main news there -- any questions or feedback?21:19
rledisezyou mean something like <null>versionning_AUTH_xxx ?21:19
kota_\u0000 seems null21:19
timburkeyeah -- though we aren't currently using it at the account level21:19
* kota_ is looking at
rledisezok, I should re-read the etherpad21:20
timburkethere would be URLs like /v1/AUTH_test/%00versioning%00<client-container>/%00<client-object>%00<timestamp>21:20
timburkepart of the reason for wanting the null namespace was so we could roll up the usage stats in the existing account DB21:21
timburkeall right -- losf!21:22
kota_the objects exist in the user namespace as possible21:22
timburkeyeah, kinda :-)21:23
timburke#topic lots of small files21:23
*** openstack changes topic to "lots of small files (Meeting topic: swift)"21:23
timburkerledisez, how's it going?21:23
rlediseznothing new on our side. alecuyer was busy on other topics21:23
rledisezhe worked on the leveldb state patch (detecting if leveldb is corrupted or not)21:24
rledisezit seems it's not as easy as he though, there is not method in leveldb to get that information21:24
timburkeinteresting. and a bit annoying, i suppose :-/21:25
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timburkeall right. i'll keep an eye out for more patches, and *some day* i'll actually find time to get this going in my dev environent21:27
timburkei feel like i'm not doing your work justice -- i keep saying i'll look at it but have hardly started :-(21:28
mattoliveraudoes leveldb support any time of checking/scrubbing. might be a good feature request for them. Then we can work on a workaround and hopefully get someone upstream to fix it long term ;)21:28
rlediseztimburke: don't worry, there is plenty of time to do it. And alecuyer will sit next to you in shangai until you try it ;)21:28
timburkeit'll be great :D21:29
timburkeall right21:29
timburke#topic open discussion21:29
*** openstack changes topic to "open discussion (Meeting topic: swift)"21:29
rledisezmattoliverau: I can't answer, alecuyer may know that21:29
mattoliveraunps, just thinking out load :)21:29
timburkemattoliverau, sorry, i dropped the sharding status updating -- figured you probably wouldn't mind too much though ;-)21:30
mattoliveraulol, nps, sorry, I haven't been to active. I was away last week. And this week ramping up in a new role.21:30
rledisezI have one topic for open discussion today: I noted recently that on our proxy servers (doing only proxy) we will be CPU-bound before we will be network-bound. our proxies are 16 cores Xeon E5-2630 at 2.40GHz, connected in 10Gbps21:30
rledisezI made some profiling (only on PUT for now) and found that the "with SomeTimeout()" around read/write on sockets are really consuming a lot of CPU21:31
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rledisezjust for the test, I removed them and was able to reduce the CPU usage by about 35% while increasing the speed of the upload by ~20% (on an other configuration with smaller CPU)21:31
timburkemattoliverau, glad the job's still safe :-)21:31
rledisezI worked a bit this afternoon on a possible alternative implementation, the idea is to get a "watchdog" greenthread that will kill a socket if nothing happened in a $timeout delay. It seems it's viable21:32
rledisezBTW, the second most consuming part is the one the enqueue/dequeue chunk for the putters. I have no idea how to patch that for now :)21:32
timburkehuh -- interesting...21:32
rledisezis CPU usage a concern for somebody else?21:32
kota_not to me but curious.21:33
mattoliverauStill trying to figure out what the new role is, hopefully I'll still get to spend some of my time upstream on any project. Just not sure how much. (obvious I plan to make that Swift).. although that also means I'm not sure how much openstack releated travel support would be included (I'm assuming none) :(21:33
timburkei'll ask around for sure -- i don't remember off hand. i *thought* we'd usually get network-bound, but maybe that's more for larger objects...21:34
mattoliverauthis is where a Mark would be handy. He'd keep an eye on things via getput and find bottle necks. But he's retired now.21:34
timburkemattoliverau, sounds like i need to try to get an LCA talk now ;-)21:34
mattoliverauyeah!! maybe we could add some basic perf test in ci/cd so we can get a baseline21:35
mattoliverauthen we could at least see any regressions.21:35
mattoliverauagain I'm just brain storming :)21:35
rledisezI'll write in an ehterpad the methodolgy I followed for that test, so everyone can check if I didn't make mistake21:36
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timburkesounds good, thanks for mentioning it!21:36
mattoliveraurledisez: good idea, if there is something we can do we should do it. we don't want no stinkin bottlenecks ;)21:37
kota_perhaps, the info what's version of eventlet might be helpful.21:37
timburkeand object size for the PUT21:37
kota_we're using thread switching around the chunk putter.21:38
rledisezeventlet 0.25, it was 4G so the test was long enough21:38
rledisezkota_: exactly, every read or write is wrapped in a with Timeout that trigger an eventlet scheduling & co… (I'm not an eventlet expert)21:39
timburkeyeah, gotta schedule the callback around
timburkerledisez, what are your object_chunk_size and client_chunk_size?21:42
rledisezdefaults (64K)21:43
timburkemight try increasing that... fwiw, i think we default to 1MB (and just tell customers to buy more RAM :P)21:43
timburkeanyway, maybe this is best left for #openstack-swift :-)21:44
rledisezsure :)21:44
kota_to fit the size of ec chunk?21:44
timburkeand we can let kota_ and mattoliverau get on with their mornings21:44
timburkethank you all for coming, and thank you for working on swift!21:44
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openstackMeeting ended Wed Oct 23 21:44:56 2019 UTC.  Information about MeetBot at . (v 0.1.4)21:44
openstackMinutes (text):
mattoliverauthanks timburke21:45
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