Thursday, 2017-03-30

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lhx_sileht, hi, sorry for my weak network12:13
lhx_damn, ping in wrong channel12:14
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mlavalle#startmeeting neutron_l315:00
openstackMeeting started Thu Mar 30 15:00:49 2017 UTC and is due to finish in 60 minutes.  The chair is mlavalle. Information about MeetBot at http://wiki.debian.org/MeetBot.15:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.15:00
*** openstack changes topic to " (Meeting topic: neutron_l3)"15:00
openstackThe meeting name has been set to 'neutron_l3'15:00
john-davidgeo/15:00
haleybhi15:01
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mlavallewelcome back john-davidge. how was sthe skiing?15:01
mlavallehaleyb: hi15:01
john-davidgemlavalle: Very hot! Probably got the last week of the snow season15:01
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mlavalleLOL15:01
mlavalle#topic Announcements15:02
*** openstack changes topic to "Announcements (Meeting topic: neutron_l3)"15:02
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mlavallePike-1 is fast approaching: Apr 10 - 1415:02
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mlavalle#link https://releases.openstack.org/pike/schedule.html15:03
mlavalleAlso, the Boston Summit is a little more than a month away15:04
mlavalle#link https://www.openstack.org/summit/boston-2017/15:04
mlavalleMay 8 - 1115:04
mlavalleI am scheduled to be there the entire week15:04
mlavalleI know haleyb will be there15:04
mlavalleHoping to see john-davidge as well15:05
haleybyes, i'll be there15:05
john-davidgeI'm still unsure, remaining hopeful15:05
mlavalleCool!15:05
mlavalleAny other announcements?15:05
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mlavalle#topic Bugs15:06
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mlavalleFirst up today is https://bugs.launchpad.net/neutron/+bug/162742415:07
openstackLaunchpad bug 1627424 in neutron "FlushError on IPAllocation" [High,In progress] - Assigned to Miguel Lavalle (minsel)15:07
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mlavalleI have been discussing this one with kevinbenton. The next step is that I am going to change IPAllocations are added to the port15:08
mlavalleTo cover that work I filed this bug: https://bugs.launchpad.net/neutron/+bug/167623515:09
openstackLaunchpad bug 1676235 in neutron "IPAM inserts a port's IP allocations directly in the database, instead of appending them to the fixed_ips relationship of the port" [Medium,Confirmed] - Assigned to Miguel Lavalle (minsel)15:09
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mlavalleIn a nutshell I am going to add the IPAllocations to the port through the fixed_ips relationship15:09
mlavalleThat will help with the enginefacade implementation and should also have an effect on the FlushError15:10
mlavalleAny comments or recommendations?15:10
john-davidgesounds good, will keep an eye on the patch15:11
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mlavalleok, moving on15:12
mlavalleNext one is https://bugs.launchpad.net/neutron/+bug/161048315:12
openstackLaunchpad bug 1610483 in neutron "Pluggable IPAM rollback mechanism is not robust" [High,In progress] - Assigned to Aliaksandr Dziarkach (aliaksandr-dziarkach)15:12
mlavallekevinbenton commented on the proposed fix. He didn't see it really addressing the bug and recommended that, if a much better solution is not proposed, remove the rollback mechanism from the IPAM API15:13
mlavalleany opinions about it?15:14
mlavalleok, cool15:15
haleybjust wondering if anyone from infoblox is around to comment15:15
mlavalleNo, I don't see john-belamaric. I will ping him and seek his opinion15:16
haleybi don't see jon around either, so guess now15:16
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mlavalle#action mlavalle to seek john-belamaric opinion on next step for bug 161048315:17
openstackbug 1610483 in neutron "Pluggable IPAM rollback mechanism is not robust" [High,In progress] https://launchpad.net/bugs/1610483 - Assigned to Aliaksandr Dziarkach (aliaksandr-dziarkach)15:17
mlavalledoes that make sense?15:17
haleybyup15:18
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mlavalleat the very least I will try to brainstorm how a real rollback mechanism should behave :-)15:18
mlavalleNext up is https://bugs.launchpad.net/neutron/+bug/162748015:19
openstackLaunchpad bug 1627480 in neutron "create_port can succeed without returning fixed_ips on all requested subnets" [High,Confirmed] - Assigned to James Anziano (janzian)15:19
mlavalleJanzian and I have spent some time with his one lately15:20
janzianWe had been suspecting it might be fixed in current master, but some occurrences popped up yesterday that somewhat dashed those hopes :(15:21
mlavalleWell15:21
mlavallewe discovered many of the hits were produced by project openstack/puppet-openstack-integration15:22
mlavallewhich seems to be using the latest stable version to execute its tests15:22
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mlavalleThe other hits are produced by project openstack-dev/devstack15:23
mlavalleand spent some time this morning checking the failures in this project15:23
mlavalleThey seem to be all related to non voting jobs in that project15:24
mlavalleI will dig deeper and update the bug with findings15:24
mlavalleBTW, no hist triggered by Neutron project15:25
janzianCool, I hadn't realized the devstack failures were non-voting15:25
mlavalleI didn't have time to go through all the hist, but I saw at least 4. so this is still tentative15:26
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mlavalleNext one is https://bugs.launchpad.net/neutron/+bug/150900415:27
openstackLaunchpad bug 1509004 in neutron ""test_dualnet_dhcp6_stateless_from_os" failures seen in the gate" [High,Confirmed] - Assigned to James Anziano (janzian)15:27
mlavalleI see 2 hits over the past 7 days15:28
mlavalleBut it's been really quiet over the past 2 weeks15:28
janzianThe first hit is a different test case producing the same error. I hadn't seen the second hit before now though15:28
mlavalleIt's been quiet over the past 2 weeks15:29
mlavalleLet's dig into those 2 failures, see if they are legit15:29
mlavalleNext one is https://bugs.launchpad.net/neutron/+bug/167270115:31
openstackLaunchpad bug 1672701 in neutron "DetachedInstanceError on subnet delete" [High,Confirmed] - Assigned to venkata anil (anil-venkata)15:31
mlavalleI think the fixes to the stable branches were realesed15:31
mlavalleand it doesn't affect master15:31
mlavalleI just wanted to confirm with haleyb it is closed15:31
mlavallesince he was involved in merging the fix15:31
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* haleyb looks15:32
haleybyes, it's in stable ocata and newton15:32
mlavallehaleyb: ok, I'll close it, so it doesn't pop up in our Launchpad queries15:33
haleybi just did15:33
mlavallethanks :-)15:34
mlavalleNext one is https://bugs.launchpad.net/neutron/+bug/167518715:34
openstackLaunchpad bug 1675187 in neutron "Floating IPs not removed on rfp interface in qrouter" [High,In progress] - Assigned to Brian Haley (brian-haley)15:34
mlavalleAgain, it showed up in the query to Launchpad15:35
mlavallehaleyb: do you want to discuss it here or keep it with the DVR team?15:35
haleybhttps://review.openstack.org/451859 was just proposed by me 20 minutes ago :)15:35
haleybi can keep it on dvr list since it's dvr-specific15:36
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mlavalleok, I won't include it in this meeting15:36
mlavalleAny other bugs from the team?15:37
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mlavallecool15:38
mlavalle#topic Routed Networks15:38
*** openstack changes topic to "Routed Networks (Meeting topic: neutron_l3)"15:38
mlavalleI just wanted to mention that last week the drivers meeting was cancelled, due to scheduling problems15:39
mlavalleit is scheduler for today and the floating ip spec is up for discussion15:39
mlavalleany comments john-davidge?15:40
john-davidgemlavalle: Is it still scheduled at the earlier time slot?15:40
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john-davidgemlavalle: I didn;t see the revert merge yet15:40
mlavallejohn-davidge: no, armax didn't like the new time, so at least for this week, it will take place at the old time15:40
john-davidgemlavalle: Ah, ok. Will you be attending? It's too late for me15:41
mlavalleyes I will15:41
john-davidgemlavalle: Ok, excellent15:41
mlavalleok15:42
mlavalle#topic Open Agenda15:42
*** openstack changes topic to "Open Agenda (Meeting topic: neutron_l3)"15:42
mlavalleAny other topics we should discuss today?15:42
haleybi have one15:42
mlavallethe floor is yours haleyb15:42
haleybforgot to add to etherpad, so will have to type it out15:42
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haleyba change to deprecate an old dns setting, https://review.openstack.org/#/c/406243 merged recently15:43
mlavalleah yeah15:43
haleybbackports were proposed but not appropriate15:43
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haleybarmax had a question about that value being in neutron.conf versus the agent file in #neutron the other day, we wanted to get your opinion we didn't miss something15:44
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haleybthe other question he had was about the deprecation not having a relationship to the new value - i.e. the original one could have had something15:45
* haleyb doesn't know how to describe it, but basically the old conf value could have pointed at the new to ease transisiton15:46
haleybmlavalle: so what are your thoughts?15:46
john-davidgehaleyb: Is the question whether it should be moved back into dhcp_agent.ini and removed from neutron.conf?15:46
mlavallewhen I proposed to deprecate dhcp_domain from the agent file15:47
haleybmlavalle: yes, that seemed to be part of it15:47
mlavallemy thinking was just to stop parameter proliferation, especially with parameters that are doing essentially the same thing15:47
haleybmy time machine is broken though15:47
mlavalleBefore DNS instegration, the decision of what to put in the the dnsmasq files was up to the agent15:49
haleybjohn-davidge: i don't think so, part was that the contents of neutron.conf could differ on nodes, which seemed almost a config bug, armax might be able to explain better, but don't see him15:49
mlavalleWhen we added DNS integration, that decision moved to the server15:49
mlavalleif the DNS integration extension is configured15:50
john-davidgehaleyb: Right, ok15:50
mlavalleso that is why we added dns_domain to neutron.conf15:50
mlavallewhen dns integration is present, the agent will take the hostname from the port data it retrives from the server15:51
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mlavalleare you with me?15:51
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haleybmlavalle: right.  and the dhcp agent is typically running on a controller, so i was a little confused by his questions15:52
haleybok, so hostname from port data, then domain from server data?15:52
mlavallecorrect15:52
mlavallebut what if the deployment oesn't configure the dns extension15:52
mlavalle?15:53
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mlavallethe port data won't have dns_assignment attribute15:53
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mlavalleso we revert to taking the decision locally in the agent15:53
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mlavallemakes sense?15:54
haleybthat seems ok, but you're the expert :)15:55
mlavallenow, I may be making one conceptual error15:55
mlavalledo we assume that the agent can read neutron.conf?15:55
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haleybi would hope so, at least on devstack it's started with both neutron.conf and it's ini15:56
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haleybmlavalle: we might just need to find armax later to discuss15:57
mlavallebeing that the case, when I marked dhcp_domain for deprecation, I was just trying to avoid parameter proliferation15:57
haleybthen i went a really removed it since it was like two releases old15:58
mlavalleexactly15:58
haleybwe're about out of time...15:59
mlavalleI can ping armax later and when I find him, I'll ping you15:59
mlavalleThanks for attending !15:59
haleybsounds good15:59
mlavalle#endmeeting15:59
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings"15:59
openstackMeeting ended Thu Mar 30 15:59:55 2017 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:59
openstackMinutes:        http://eavesdrop.openstack.org/meetings/neutron_l3/2017/neutron_l3.2017-03-30-15.00.html15:59
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/neutron_l3/2017/neutron_l3.2017-03-30-15.00.txt16:00
openstackLog:            http://eavesdrop.openstack.org/meetings/neutron_l3/2017/neutron_l3.2017-03-30-15.00.log.html16:00
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edleafe#startmeeting api_wg16:00
openstackMeeting started Thu Mar 30 16:00:13 2017 UTC and is due to finish in 60 minutes.  The chair is edleafe. Information about MeetBot at http://wiki.debian.org/MeetBot.16:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.16:00
*** openstack changes topic to " (Meeting topic: api_wg)"16:00
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openstackThe meeting name has been set to 'api_wg'16:00
edleafe#chair cdent elmiko edleafe16:00
openstackWarning: Nick not in channel: cdent16:00
openstackCurrent chairs: cdent edleafe elmiko16:00
edleafeWho's here?16:00
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* edleafe is feeling lonely...16:01
edleafeWell, I'll go through the motions, at least :)16:03
edleafe#link Agenda https://wiki.openstack.org/wiki/Meetings/API-WG#Agenda16:03
edleafe#topic previous meeting action items16:03
*** openstack changes topic to "previous meeting action items (Meeting topic: api_wg)"16:03
edleafe#link http://eavesdrop.openstack.org/meetings/api_wg/2017/16:03
edleafeFirst:16:03
edleafeelmiko to make an agenda item to think about what we do16:03
edleafe(referring to the mission statement part of http://specs.openstack.org/openstack/api-wg/process.html)16:03
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edleafeSince no elmiko here, I'll defer to next week16:03
edleafe#action elmiko to make an agenda item to think about what we do16:04
edleafeAlso:16:04
edleafeedleafe to explore the apocryphal option 5 on the stability guideline16:04
edleafethat is, https://review.openstack.org/#/c/421846/16:04
edleafeI'm not clear exactly where we are, but I have tried to spur discussion in the review.16:04
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edleafe#topic open mic and new biz16:04
*** openstack changes topic to "open mic and new biz (Meeting topic: api_wg)"16:04
edleafeDon't really fancy hearing myself talk (or type) so...16:05
edleafe#topic guidelines16:05
*** openstack changes topic to "guidelines (Meeting topic: api_wg)"16:05
edleafe#link https://review.openstack.org/#/q/status:open+project:openstack/api-wg,n,z16:05
edleafeI think that this is ready for freeze:16:05
edleafe#link pagination guideline https://review.openstack.org/44671616:05
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edleafeThis is trivial, but I wanted at least one more OK before merging:16:05
edleafe# link clarify meaning of BODY https://review.openstack.org/45156816:05
edleafe#topic bug review16:06
*** openstack changes topic to "bug review (Meeting topic: api_wg)"16:06
edleafenothing exciting here16:06
edleafe#topic weekly newsletter16:06
*** openstack changes topic to "weekly newsletter (Meeting topic: api_wg)"16:06
edleafe#link https://etherpad.openstack.org/p/api-wg-newsletter16:06
edleafeGuess I'll take that one :)16:06
edleafeSo I'm done. I'll keep the meeting open for a bit in case there are stragglers who arrive late.16:07
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stevelleI just watched because not much to say16:07
stevelleguessing we don't have bagels this week since it wasn't your turn to bring them16:08
* edleafe is relieved that he isn't the only one appearing in the logs :)16:08
edleafeI can offer you some lukewarm coffee16:08
stevelleI got a cup of that already16:08
edleafeheh16:09
stevelleso on the stability guideline. I lost track of what option 5 really means16:09
edleafeme too16:09
edleafeIIRC, it was the option of assuming "robust" clients who could handle addtions16:10
stevellephew.16:10
edleafeLike new URLs and extra properties in a response16:10
edleafeIOW, the anti-Monty proposal16:10
edleafeIt might also be the non-microversion one, too16:10
edleafelike going with a more semver-like approach16:11
stevelleso do we need someone to take that assumption and roll through the proposal shouting 'bin it' everywhere to reduce the scope?16:11
edleafeyeah, I dunno16:11
stevellethat way we can rehash every argument?16:11
edleafethis is the sort of thing that is best done in person, like at the PTG16:11
stevelleagreed16:12
edleafeThe only problem is we had one side in the morning, and the response in the afternoon16:12
edleafeNo back-and-forth between the two16:12
edleafeThe latest version is based on those discussions.16:12
stevellewithout a time schedule it was really tough to predice. collectively we'll learn16:12
edleafeSo it seems odd to go back to before they happened16:13
edleafeThis seems like something that would be hard to iterate on16:13
edleafeWe have to get pretty freakin' close on the first shot16:13
stevelleso extra properties or not, the functionality of a robust client would seem to be the LCD of a feature set16:13
stevelletrying to exceed the LCD requires something like a 'smart' client instead of 'robust'16:14
stevelleso I think we have a natural ceiling to how much that helps16:14
edleafeand that's not compatible with the Monty scenario of strict cross-cloud compatibility16:15
stevellealso true16:15
edleafehey, wait16:15
edleafemordred16:15
edleafemordred16:15
edleafeOA16:15
edleafeugh16:15
edleafemordred16:15
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edleafemaybe if I say his nick 3 times he'll magically appear16:15
stevellehave to stand in front of a mirror with the lights off?16:16
edleafei do have my garlic necklace on16:17
edleafeWell, I hope that we can discuss this in person again, although neither cdent nor I will be at the Forum in Boston16:17
stevellesame same16:18
edleafeMaybe we need two tags: API stability, and cloud interop compatibility16:18
edleafeThe former is the "robust client" standard, and the latter is the Monty standard16:18
stevelleI think that is a solid idea16:18
stevellemuch more versatile16:19
edleafeThe only problem is that most projects will never bother with the latter16:19
edleafetoo difficult16:19
edleafefor too little (or no) benefit to themselves16:19
edleafeHmmm, maybe I should write a blog post on this16:19
stevellethough interop implies stability so we have a kind of tiered tag which was rejected in one form at PTG. this is different however in that this idea cuts functionally rather than on a measure of adherence.16:20
stevellethat makes it like the upgrade tags16:20
stevellenova will get the interop tag at least, right?16:20
edleafeexactly, it's not like "stable" and "pretty stable"16:21
stevelleanyway, +1 for exploring stability and interop tags separate16:21
edleafeWell, nova, ironic, placement, and any other microversion-based project16:21
stevellethough as has been discussed, ironic has a bit of a challenge in their extensions16:22
edleafeI think that if cloud A runs ironic with the same extensions as cloud B, the responses at the same version should be the same, no?16:23
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stevellewhat if they have different extensions?  I'm not an expert on this16:24
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stevelleI felt like I remembered that there was message format differences w/ different extensions. That may have been worked out in terms of scope of the tag at ptg?16:25
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edleafewell, that sound like we're drifting back into the absolutist realm16:25
edleafenova has adopted an absolutist postion: no extensions, period16:25
edleafethat won't work with other projects16:25
stevellefair enough, and I think there are projects who then can do interop now.16:26
edleafeMy understanding is that two clouds runnign the same extensions would return the same format16:26
stevellejust not many16:26
edleafedifferent extension, though, would probably differ16:26
edleafeand that's ok16:26
stevelleagreed.16:27
stevelleand if someone wants to propose an image service API that can claim interop, that seems like a win.16:27
edleafewell, thanks for showing up. I think I'll crank out the newsletter and then write up a blog post on this16:28
stevellesame for other services that might be on the fringe, heat et al16:28
stevelleyup, looking forward to reading it.16:28
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edleafe#endmeeting16:30
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings"16:30
openstackMeeting ended Thu Mar 30 16:30:33 2017 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)16:30
openstackMinutes:        http://eavesdrop.openstack.org/meetings/api_wg/2017/api_wg.2017-03-30-16.00.html16:30
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/api_wg/2017/api_wg.2017-03-30-16.00.txt16:30
openstackLog:            http://eavesdrop.openstack.org/meetings/api_wg/2017/api_wg.2017-03-30-16.00.log.html16:30
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olaphany app catalog peeps?17:01
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SumitNaiksatamrkukura: tbachman annak igordcard: hi18:01
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tbachmanSumitNaiksatam: hi!18:01
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annakhi!18:01
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SumitNaiksatam#startmeeting networking_policy18:01
openstackMeeting started Thu Mar 30 18:01:32 2017 UTC and is due to finish in 60 minutes.  The chair is SumitNaiksatam. Information about MeetBot at http://wiki.debian.org/MeetBot.18:01
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.18:01
rkukurahi18:01
*** openstack changes topic to " (Meeting topic: networking_policy)"18:01
openstackThe meeting name has been set to 'networking_policy'18:01
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SumitNaiksatam#info agenda https://wiki.openstack.org/wiki/Meetings/GroupBasedPolicy#March_30th.2C_23rd_201718:02
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SumitNaiksatamsince igordcard is around18:02
SumitNaiksatam#topic QoS patch18:02
*** openstack changes topic to "QoS patch (Meeting topic: networking_policy)"18:02
SumitNaiksatam#link https://review.openstack.org/42643618:02
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SumitNaiksatamigordcard: thanks for fixing all the issues, great work18:02
SumitNaiksatamrkukura: do you think your comments are addressed on this patch?18:03
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rkukuraI think so - planning to re-review18:03
SumitNaiksatamrkukura: thanks18:03
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SumitNaiksatamigordcard: as before, my apologies for dragging this patch for so long18:03
rkukuraI wasn’t sure if we wanted to merge this right away, or hold off until the newton work settled out completely18:04
SumitNaiksatamigordcard: we were battling some pretty nasty DB issues last week, and I preferred to not merge anything major which might have further complicated debugging the DB issues18:04
SumitNaiksatamrkukura: right, just saying that18:04
SumitNaiksatamigordcard: we did solve one of the DB problems (which i will update a little later)18:05
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SumitNaiksatamwe should be in a position to merge this as soon as a couple of the other issues settle down18:05
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SumitNaiksatamigordcard: i dont anticipate that any of the fixes we make will have any impact on your patch18:06
rkukuraSumitNaiksatam, igordcard: Do we plan to back-port QoS to stable/newton and/or stable/mitaka?18:06
SumitNaiksatamrkukura: at this point i am not inclined to backport to mitaka18:06
rkukuramakes sense18:07
SumitNaiksatamrkukura: okay18:07
SumitNaiksatamokay moving on18:08
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SumitNaiksatam#topic Use of upper constraints on master18:08
*** openstack changes topic to "Use of upper constraints on master (Meeting topic: networking_policy)"18:08
SumitNaiksatamso basically the summary here is that regardless of what branch version we use in the tox.ini for the upper-constraints, the upstream openstack infra job looks at the branch name and basically uses the version of upper-constraints based on that18:09
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SumitNaiksatamthis messes up things in our case where our master trails the rest of openstack18:10
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SumitNaiksatamso if we take the current snapshot, we are on newton but the py27 job is being run with library dependencies of pike18:11
SumitNaiksatameven if we specify explicit version numbers in requirements or test-requirements, if the dependency is present in upper-constraints, the version in upper-constraints takes precedence18:12
SumitNaiksatamthe best fix is to obviously catch up with openstack master, so that we are trailing18:12
SumitNaiksatambut since we are not there yet, we have to work around this18:13
SumitNaiksatamone of my recent commits fixed an issue related to this such that it worked in the CI, but it broke local tox py27 runs18:13
SumitNaiksatamrkukura: thanks for catching that18:13
rkukurathat was an easy one18:14
annakwe can adjust the local runs..18:14
igordcardthanks SumitNaiksatam, sorry was on another conversation18:14
SumitNaiksatamrkukura: and you were contemplating chaning the upper-constraints of our master to point to our master18:14
SumitNaiksatamigordcard: no problem at all18:14
SumitNaiksatamigordcard: thanks for sticking around18:14
rkukuraSumitNaiksatam: yes, two possible fixes18:14
igordcardSumitNaiksatam: [qos] backporting to newton should be alright18:15
SumitNaiksatamrkukura: i am not in favor of changing the upper-constraints version for our master just yet18:15
SumitNaiksatamigordcard: yes, that wouldnt be an issue18:15
rkukuraSumitNaiksatam: I agree - I’d rather catch issues while developing rather than while back-porting18:15
SumitNaiksatamrkukura: exactly, you said it well18:16
SumitNaiksatamrkukura: so for now lets roll with your patch18:17
SumitNaiksatamrkukura: i just had some nit comments on it18:18
rkukuraOK - just fixed the commit msg, and will add the REVISIT in a moment18:18
SumitNaiksatamthat said, we will continue to live on the edge for this reason! :-(18:18
SumitNaiksatamrkukura: great thanks18:18
SumitNaiksatami think songole is not around18:19
SumitNaiksatamunfortunately we have not been able to make progress with the NFP patches for the same reason as for the QoS patch18:19
SumitNaiksatamwe need newton to settle, before we can start merging any major changes18:20
SumitNaiksatam#topic Open Discussion18:20
*** openstack changes topic to "Open Discussion (Meeting topic: networking_policy)"18:20
SumitNaiksatamannak: thanks for the patch on pep-8 changes, great contribution towards the betterment of the project!18:20
annakSumitNaiksatam: np18:21
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rkukuraSo are we seeing more deprecation warnings now that we should deal with?18:21
SumitNaiksatamannak: the merge failures on that patch were on account of the upper-constraints issue discussed earlier here, but for now we dodged a bullet and were able to get through18:21
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SumitNaiksatamrkukura: i havent checked after annak’s latest merge, but i suspect yes18:22
annakSumitNaiksatam: yes, thanks18:22
rkukuraI think its mostly stuff that’s moved to neutron_lib18:22
SumitNaiksatamrkukura: the ones that remain are probably bigger changes in terms of which APIs we are using18:22
SumitNaiksatamrkukura: yes18:22
SumitNaiksatamrkukura: there might be some keystone/keystoneclient related too18:23
SumitNaiksatamand most likely these are already deprecated in Ocata, so we will have to deal with these pretty soon18:24
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SumitNaiksatamof course, as a standard operating procedure, we should not be waiting for a deprecation to happen :-)18:25
SumitNaiksatamthe other update i had was on the DB issue18:25
SumitNaiksatamlast week i had reported this: #link https://www.pastiebin.com/58d16e63140f918:26
SumitNaiksatamthe DB reentrant issue18:27
SumitNaiksatamit turned out that this was an issue in the “aim” code outside of GBP18:27
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SumitNaiksatamso it was happening only when configuring the aim_mapping GBP driver18:27
SumitNaiksatamthe issue was that a session was being switched with another during a transaction18:28
SumitNaiksatamthe switch was inadvertent, hence difficult to find, and had catastrophic results!18:28
tbachmanSumitNaiksatam: good find!18:28
SumitNaiksatamtbachman: yes, thank amit! :-)18:29
SumitNaiksatamthere are still a couple of other DB issues we are looking at18:29
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SumitNaiksatami am still sitting on the “resource closed” error, not reproduced it yet, and rkukura is dealing with the stale data error (which is specific to aim driver)18:30
SumitNaiksatambut regarding the first issue, switching of session is very difficult to catch, so we needless to say, we have to be extra careful when we pass the session around18:31
SumitNaiksatami was also thinking if we could instrument an automatic check if the session gets used outside the scope of the thread that created it18:31
* tbachman kicks the evil “session cache” daemon18:31
SumitNaiksatamtbachman: :-)18:31
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rkukuraSumitNaiksatam: I like that idea18:32
SumitNaiksatamrkukura: okay18:32
SumitNaiksatamthe last thing i wanted to bring up is adding “retry” decorators for the GBP plugin, similar to the one that the neutron plugin has18:32
SumitNaiksatamcurrently we are seeing an issue, at least with the aim_mapping driver, where concurrent operations cause failure18:33
SumitNaiksatamin such cases, a retry would help18:33
SumitNaiksatam(the failure is because the concurrent operations lead to mutliple per-tenant resources)18:34
annakSumitNaiksatam: do you have the patch that fixes the session issue so i can get better idea about the problem?18:34
SumitNaiksatamannak: its outside of GBP but I can certainly point you to where it is18:34
SumitNaiksatamannak: i will follow up with you offline18:35
annakSumitNaiksatam: thanks18:35
SumitNaiksatamrkukura: tbachman: do you have any thoughts about adding the retry decorator?18:35
tbachmanSumitNaiksatam: not sure I know of a reason against it?18:36
SumitNaiksatami had actually added them in the newton sync patch, but eventually removed them before it got merged18:36
SumitNaiksatamtbachman: and i dont recall why18:36
tbachmanSumitNaiksatam: things like this already exist in neutron, I believe (e.g. port binding)?18:37
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SumitNaiksatamtbachman: right, so we can follow that pattern18:37
SumitNaiksatamokay, since there does not seem to be an objection, i wil try it out18:37
SumitNaiksatamsongole: hi, we were just about to wrap up18:38
annakjust a heads up - I'm planning to start posting the vmware plugin soon, it is still under heavy WIP so probably not worth looking at yet18:38
songoleSorry, I am late18:38
SumitNaiksatamannak: np, feel free to post18:38
SumitNaiksatamannak: most of our patches start that way :-)18:38
annak:)18:38
SumitNaiksatamannak: i actually prefer to post even at an early stage, if not for anything else, just to see how it fares in the upstream gate18:39
rkukurasorry - got interrupted18:39
SumitNaiksatamannak: we could also consider adding a new gate job for that plugin18:40
SumitNaiksatamsongole: np18:40
rkukuraI was also going to ask about adding retry decorators to the GBP API18:40
annakSumitNaiksatam: yes, definately. but too early for that as well18:40
SumitNaiksatamrkukura: so you feel we should add18:40
SumitNaiksatamannak: sure18:40
SumitNaiksatamannak: but be aware that the gate job that CI gives is just a hook (with devstack install)18:41
SumitNaiksatamannak: you can decide what tests you want to run18:41
SumitNaiksatamannak: so in the initial stage you can run something very basic18:41
SumitNaiksatamsongole: i apologized earlier for not making progress with the NFP patches :-)18:42
rkukuraSumitNaiksatam: Whether we should need to rety decorators depends on the DB isolation level, I think18:42
SumitNaiksatamrkukura: could you elaborate?18:43
songoleSumitNaiksatam: np. We will not be merging until mid next week18:43
SumitNaiksatamsongole: one of the reason we are holding back a bit is because all the DB issues are not yet resolved with newton18:44
songoleok18:44
SumitNaiksatamsongole: so we want to avoid complicating the problem (which we are anyway finding difficult to debug) with more changes on top18:45
songoleSumitNaiksatam: Could me merge it for mitaka first in that case?18:45
rkukuraSumitNaiksatam: As I understand it, neutron was originally written assuming a high isolation level, such as serializable, but I think this has been relaxed over time18:45
SumitNaiksatamsongole: most likely the NFP patches are not going to affect anything major in the framework, but we just want to be careful, since we had some issues now with outside repos breaking us18:45
rkukuraThere is also the version column thing, which maybe we should be using18:46
rkukurawhen ensures a commit fails if some other TX increments versions of rows that it modifies18:46
SumitNaiksatamrkukura: you mean object versioning (OVO)?18:46
rkukurano, its a column in the DB that keeps a version counter for each row18:47
SumitNaiksatamrkukura: okay18:47
rkukura#link http://docs.sqlalchemy.org/en/latest/orm/versioning.html18:47
SumitNaiksatamrkukura: ah thanks, i was thinking something totally different18:48
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SumitNaiksatamrkukura: have you observed this pattern being used in openstack?18:49
rkukuraMy very vague understanding of Neutron’s approach now is to allow a lower isolation level, such as read committed, and count on the DB throughing retry exceptions when attempting to commit something that has been concurrently modified18:49
rkukuras/throughing/throwing/18:49
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SumitNaiksatamrkukura: okay18:50
rkukuraneutron.db.standard_attr includes “version_id_col”18:51
SumitNaiksatamrkukura: okay18:51
SumitNaiksatamrkukura: the retry decorator should work for that case, right?18:52
rkukuraso I think the retry decorators work together with the StaleDataError exceptions18:52
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rkukuraright, the version_id_col declaration tells sqlalchemy to raise StaleDataError during commit if the version number isn’t what was expected.18:53
SumitNaiksatamrkukura: okay18:53
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SumitNaiksatami am hoping they will also work in the case, say, when a per-tenant resource is attempted to be created from two concurrent threads, one succeeds, the other one fails18:54
SumitNaiksatambut the one which fails can be retried, and will now see the per-tenant resource already present and would not try recreating it the second time around18:55
rkukuraSo if we really are using read committed or repeatable reads isolation level, but aren’t suing version_id_col, then we might be exposed to all kinds of concurrency issues18:55
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* tbachman notes the time18:56
SumitNaiksatamtbachman: thanks :-)18:56
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SumitNaiksatamrkukura: okay, thanks for bringing that up18:57
SumitNaiksatamrkukura: will take up this discussion offline with you18:57
rkukurasure18:57
SumitNaiksatamsongole: i am not sure front porting is a good model18:57
SumitNaiksatamsongole: lets see which patches you have in mind18:58
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SumitNaiksatamsongole: hopefully we can open up the master itself soon18:58
SumitNaiksatamokay if nothing else, we can wrap up for today18:58
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SumitNaiksatamthanks all for joining!18:59
tbachmanSumitNaiksatam: thanks!18:59
rkukurathanks SumitNaiksatam!18:59
SumitNaiksatambye!18:59
SumitNaiksatam#endmeeting18:59
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings"18:59
openstackMeeting ended Thu Mar 30 18:59:14 2017 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)18:59
openstackMinutes:        http://eavesdrop.openstack.org/meetings/networking_policy/2017/networking_policy.2017-03-30-18.01.html18:59
rkukurabye18:59
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/networking_policy/2017/networking_policy.2017-03-30-18.01.txt18:59
openstackLog:            http://eavesdrop.openstack.org/meetings/networking_policy/2017/networking_policy.2017-03-30-18.01.log.html18:59
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annakbye!19:01
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