Tuesday, 2016-09-13

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openstackgerritDustin Lundquist proposed openstack/neutron-lbaas: haproxy ns driver: set global haproxy maxconn  https://review.openstack.org/36908800:14
openstackgerritStephen Balukoff proposed openstack/octavia: Set haproxy global connection limit  https://review.openstack.org/36908900:18
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openstackgerritStephen Balukoff proposed openstack/octavia: Set fullconn parameter in haproxy backends  https://review.openstack.org/36910201:07
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openstackgerritNir Magnezi proposed openstack/neutron-lbaas: Adds neutron_lbaas.conf and services_lbaas.conf to q-svc command line  https://review.openstack.org/36669007:52
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openstackgerritNir Magnezi proposed openstack/octavia: Amphora agent refactor to classes  https://review.openstack.org/34672809:35
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openstackgerritNir Magnezi proposed openstack/neutron-lbaas: Adds neutron_lbaas.conf and services_lbaas.conf to q-svc command line  https://review.openstack.org/36669011:17
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sbalukoffdiltram: Please have a look at my response to your comments on the documentation patch. I know I'm coming across as pretty harsh there, but I'm honestly getting sick of quibbling over this, and having half-helpful feedback. (Saying, "This is wrong" is only half as helpful as "this is wrong, and here's how you correct it...")15:50
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sbalukoffGerrit's being it's awesome "responsive" self today. Is there a deadline today that I don't know about?16:42
sbalukoffer... its.16:42
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johnsomRC1 is today17:05
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sbalukoffAah! Ok.17:10
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fishboneis it possible to ask questions about lbaasv2 with haproxy in this chat?17:16
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sbalukofffishbone: You mean with the namespace driver? This would be the place to ask questions, but to be honest, most people here are working on the reference driver (Octavia).17:25
johnsomfishbone This is the right place17:25
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dougwigyou scared off fishbone17:36
sbalukoffWell... I am an asshole.17:36
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fishbonehaha sorry, I am at work17:38
fishboneI have an error in the lbaasv2 dashboard panel when I try to create a load balancer17:38
fishbonewhen I get to the final step and submit it says "error: source_type"17:39
fishboneI am able to create and list all load balancer items in the command line17:39
fishbonebut if i create anything the panel changes error to "cannot retrieve pool list"17:40
fishboneI am using lbaasv2 with haproxy, and have the lbaasv2 panel installed in horizon17:40
zetabsomeone could code nginx for lbaasv2 ;)17:41
dougwigfishbone: are you using the lbaasv1 or v2 horizon dashboard?17:42
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fishboneI am using lbaasv217:49
sbalukoffjohnsom: Could I ask your opinion on something: Should we just disable ulimits for filehandles and whatnot on amphorae, or set them to some arbitrarily high value that we hope won't cause the amphorae to crash if a tenant sets a listener connection limit to some ridiculously high value?  On that note as well, should we set a maximum value to which the tenant can set the connection limit?17:49
fishboneI don't know what the version of horizon is but it came from the mitaka repository package17:49
dougwigsbalukoff: shouldn't we set them to some multiple of the requested limits?17:49
dougwigfishbone: any errors in the neutron server log, or is the dashboard never even making the lbaas api request?17:50
sbalukoffdougwig: We could potentially adjust this on the fly, but if we're going to have a maximum possible limit that we allow, there's no reason we can't just do this on the amphora image at boot (ie. with a disimagebuilder element)17:51
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dougwigsbalukoff: true. i was thinking of catching leak conditions quicker, but don't have a strong preference.17:51
sbalukoffI think haproxy is "being good" with how it pre-allocates filehandles and whatnot.17:52
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sbalukoffSo if there's a leak, I wouldn't expect to see it in haproxy's file handles.17:52
johnsomsbalukoff A couple things to note:17:53
johnsomhttps://github.com/openstack/octavia/blob/master/elements/haproxy-octavia-ubuntu/post-install.d/20-haproxy-tune-kernel#L1917:53
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sbalukoffOh! So we're already trying to tune it. So... yeah, I can just fix that bug.17:54
johnsomAside from that,  doesn't the ulimit get set by haproxy based on maxconn?17:55
sbalukoffIt's supposed to. But when I'm testing the maxconn patch I wrote, I'm seeing this in the haproxy logs: [WARNING] 256/165039 (20882) : [/usr/sbin/haproxy.main()] FD limit (1024) too low for maxconn=1000000/maxsock=2000030. Please raise 'ulimit-n' to 2000030 or more to avoid any trouble.17:56
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johnsomSo, this isn't set/working? https://cbonte.github.io/haproxy-dconv/1.5/configuration.html#maxconn17:57
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johnsomOr is is just a bogus warning17:58
openstackgerritCedric Shock proposed openstack/neutron-lbaas: Allow creating loadbalancer with network_id  https://review.openstack.org/36330217:59
johnsomI guess we could set this too: https://cbonte.github.io/haproxy-dconv/1.5/configuration.html#ulimit-n17:59
sbalukoffI'm still looking into it.17:59
sbalukoffIn any case, our past intent I think is clearer to me now.18:00
johnsomOk, cool.  I have been looking at these patches today.  I hope my afternoon stays free and I can crank through a bunch of reviews today.18:01
sbalukoffNice!18:01
openstackgerritPhillip Toohill proposed openstack/octavia: WIP: Octavia: Basic LoadBalancer Scenario Test  https://review.openstack.org/17219918:01
sbalukoffI think Dustin's patches should be good to go-- they wouldn't have the same ulimit concern anyway.18:01
johnsomIn theory they would, wouldn't they?18:02
sbalukoffWell, the namespace driver is less concerned with the underlying host's tuning.18:02
sbalukoffOn Octavia, we have to be concerned with this, since the amphora is supposed to act like a virtual appliance.18:02
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johnsomYes, true, but we should set the haproxy settings up similar I expect.18:03
sbalukoffIn other words, with the namespace driver, if you get a log warning like that, it's up to the operator to re-tune the hosts running the lbassv2 namespace agent. From within lbaasv2, I think it's generally a bad idea to try to tune the host since were really have no idea how it's deployed.18:04
sbalukoffOh yes! His patches do that.18:04
johnsomYeah, I agree we should not mess with the  host18:04
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sbalukoffBut Octavia "owns" the whole amphora. So I'll need to fix the amphora VM tuning (if necessary) in my patch for the patch to be meaningful.18:05
johnsomYep18:05
sbalukoffOk. Gonna go heads down for while and poke at this problem.18:06
dlundquistThis article has a number of tuning suggestions for proxying a large number of connections https://mrotaru.wordpress.com/2015/05/20/how-migratorydata-solved-the-c10m-problem-10-million-concurrent-connections-on-a-single-commodity-server/. I wanted to take care of the 2k haproxy default limit first, then look at further optmizations.18:12
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dlundquistsbalukoff: ^^^18:13
sbalukoffdlundquist: Aah! Yes, thanks for that!18:15
dlundquistRaising the ulimit value to unlimited for the amphora does seem like a good optimization, but I think there is a fair amount of work down this path, but a 1m concurrent connection Octavia demo would be pretty cool.18:16
sbalukoffWell... it may make sense to just make a separate tuning patch based on what I'm seeing. I mean, the one there addresses the haproxy config problem, but tuning is probably a seperate concern.18:17
sbalukoffSo yeah... let me get rid of the -workflow on that.18:17
dlundquistAlso, network tuning sysctl's still apply to namespace driver.18:18
sbalukoffdlundquist: I would consider that a deployment problem.18:19
dlundquistactualy not, since each new namespace has default network stack tuning18:19
dlundquistthe deployer can not configure those18:19
sbalukoffOh?18:19
dlundquistSince they are create on demand, we could ship a lbaas-ns-sysctl file and let them customize as needed18:20
sbalukoffEr...  where does it get the 'default network stack tuning'?18:20
dlundquistferry docking now, back in a bit18:20
dlundquistcomplied into linux18:20
sbalukoffAah, crapsticks.18:20
sbalukoffWell, that probably explains why the haproxy running in a namespace on the amphora is seeing a 1024 file limit. :P18:21
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fishbonedougwig: sorry for the late response, no there is nothing in the lbaasv2 logs and the neutron-server log has no errors or warnings18:36
openstackgerritTrevor Vardeman proposed openstack/octavia: Adding a unit test for graph create failure case  https://review.openstack.org/36962718:37
fishbonedougwig: how would I know if the api requests are being made? That sounds like it may be the issue18:37
johnsomfishbone You can check the q-svc.log  The API calls should be logged in there for LBaaSv218:40
fishbonejohnsom: thanks I will check and get back18:41
johnsomdlundquist sbalukoff I see the kernel tuning settings we have setup for the amp visible when I sysctl  -a from inside the namespace.  Are you sure they aren't using the /etc/sysctl.d settings?18:45
dlundquistjohnsom: some of them apply, only network ones do not18:46
dlundquistExample woudl net.ipv4.conf.all.forwarding18:47
johnsomYep, ok, I see it now.  I was too lucky on what I queried the first time18:48
dlundquistUlimit should not be different in a network namespace since it is a filesystem configuration option18:48
johnsomInteresting, I wonder how we aren't having issues with the nonlocal_bind not being set18:48
dlundquistmaybe it's more nuanced... It's easy enough to test18:51
johnsomInteresting to note as well, sysctl -- system seems to have applied some of the settings, but not all.  port_range came in, but rmem did not18:53
fishbonejohnsom I don't have a file with that name on my controller node18:55
TrevorVdiltram, you around?19:03
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openstackgerritDustin Lundquist proposed openstack/neutron-lbaas: haproxy ns driver: set global haproxy maxconn  https://review.openstack.org/36908819:25
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fishbonejohnsom also when I do an ip netns command the loadbalancers created in command line do not show19:44
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openstackgerritDustin Lundquist proposed openstack/neutron-lbaas: haproxy ns driver: set global haproxy maxconn  https://review.openstack.org/36908819:55
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fishbonewhen I create a load balancer in the lbaasv2 logs it says stats socket not found, I think the issue is with the haproxy namespace driver20:20
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sbalukoffThat's bizarre...  so dlundquist's patch to restore those unit tests is failing in the gate now, and the specific tests that are failing are not related to the tests he restored.21:49
sbalukoffBut it's failing in the merge gate where it passed the tests previously.21:49
sbalukoff(The fix looks like it should be simple-- the six failing tests are all API tests that are now including a project_id whereas they didn't before.)21:50
sbalukoffBut it's a little disturbing to me to see the merge gate spontaneously fail like this.21:51
sbalukoffAah--  Ok, looks like something merged upstream (again) last night which is causing the gate to fail (again) (both test and merge). Dang, that's annoying. :P21:52
dlundquistYeah, my dependent patch just started failing (passed locally). Removed local .tox environment and it fail locally now21:52
sbalukoffOk.21:53
sbalukoffSo yeah, it's a Neutron thing.21:53
sbalukoffDo you want to make a patch to fix this, or shall I?21:53
dlundquistI don't see the cause, but would like to learn what it is from your patch.21:54
sbalukoffOk.21:54
sbalukoffAlso, in my poking around on the amphora with ulimits, I see that our setting for file-max actually was working. I was just trying to raise the connection limit too high for it--  the connection limit can be at most approx. half of the file-max limit. Which means we're currently at 500k connections as an effective limit.21:58
sbalukoffAnd that seems... adequate. :)21:58
sbalukoffBut the error that gets reported is reporting the wrong number. Someone should open a bug report with haproxy. ;)21:58
sbalukoffIn any case, I'm going to open an RFE bug to do C10k stuff with Octavia. But it'll probably be a pretty low priority for the time being (as we're on countdown-to-release mode right now).21:59
dlundquistI agree, C10k (actually much higher 15+ years later) sounds like RFE work for Ocata22:01
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rm_worklol C10M22:05
rm_workaccording to wikipedia22:05
* rm_work is reading up :P22:05
dasmdlundquist: sbalukoff if you're talking about http://logs.openstack.org/82/369082/2/gate/gate-neutron-lbaas-python35/4bee452/testr_results.html.gz it looks like affected by https://review.openstack.org/#/c/357977/22:11
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sbalukoffdasm: Yeah, that's what I'm seeing. I'm guessing that patch is not going to get rolled back, eh?22:12
sbalukoff(I'm working on a fix for our tests to expect the project_id)22:13
openstackgerritTrevor Vardeman proposed openstack/octavia: Add quota support to Octavia  https://review.openstack.org/36079422:13
dasmsbalukoff: not likely. HenryG came up with something like this for vpnaas: https://review.openstack.org/#/c/369717/22:14
dasmsbalukoff: it's one-way ticket.22:14
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sbalukoffdasm: Eh... It's just six failing tests with us; And since that project_id is going to be there in the API request going forward, I don't mind just updating these tests to look specifically for it.22:16
dasmsbalukoff: ack.22:18
sbalukoffAwesome! Launchpad won't let me report this as a bug. Timeout errors. Yay for RC1 day!22:35
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openstackgerritStephen Balukoff proposed openstack/neutron-lbaas: Expect project_id in API calls  https://review.openstack.org/36974322:47
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openstackgerritStephen Balukoff proposed openstack/neutron-lbaas: Expect project_id in API calls  https://review.openstack.org/36974323:08
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sbalukoff rm_work, dougwig, and/or johnsom: I think this neutron-lbaas gate fix should be ready: https://review.openstack.org/#/c/369743/23:22
sbalukoffIt's not through the check gate yet, but the tests that were failing are now passing.23:22
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johnsomOk, will have a look23:22
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dougwigsbalukoff: should we be passing *both* ?  and shouldn't the old way work long-term, so why was it breaking?23:28
sbalukoffdougwig: It doesn't break things to pass both. And no matter which one we pass, both will be returned (which is what broke us).23:29
dougwigsbalukoff: oh, i see.23:29
johnsomYeah, seems like a big change to land this late in the cycle23:30
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sbalukoffHeh! Indeed.23:31
sbalukoffHaving said that, multiple gate breaks due to related projects is sort of par for the course the week people are cutting releases.23:33
sbalukoffAlso, if y'all agree with Henry's comment on that, I can cut a new patch set which solves things similarly to what he suggested. (I disagree with him, but, I'm happy to be overridden if y'all think differently.)23:34
sbalukoffI'll be working for at least another hour today. :)23:34
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johnsomI'm on the fence.  I'm not sure I care too much that they are giving use extra data, but on the other hand notice that "project_id" is coming is useful.23:36
johnsomMore to the point, this is done, so I really don't have a problem kicking the can23:37
sbalukoffHeh!23:37
dougwigsbalukoff: i agree with henry, but i'm fine with a follow-up, now or later.23:45
dougwigi'm not going to hold the gate hostage for my opinion.23:46
sbalukoffOk.23:46
sbalukoffSounds like we need to start rooting tenant_id out of the code tree anyway.23:46
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sbalukoffBut again, yes, that can happen after the gate is fixed.23:46
johnsomI thought we left it for backward compat.23:47
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dougwigwe have to accept it and return it long-term, we don't have to use it.23:47
sbalukoffYeah, it'll be hard to get rid of it where we touch 3rd parties (or vendor drivers)23:47
dougwigmy gate will be a test that tenant_id still works, since i hate the term 'project'.23:48
sbalukoffHaha!23:48
johnsomLet's be honest and call it bozo_id....23:49
sbalukoff'project' is a sort of useless word in the IT industry. It's got as many meanings as "thing" or "entity"23:49
sbalukoffPassive-aggressive variable naming. How very Pacific Northwest of you. ;)23:50
johnsomHa, I just googled and bozo has a harsher connotation than it did when I was a kid...23:51
dougwigsbalukoff: one of the benefits of evil vendor code is that i can be passive aggressive.23:52
johnsomhttp://www.waymarking.com/waymarks/WMGJ8M_Bozo_the_Clowns_Childhood_Home_Jacksonville_OR23:53
sbalukoffOh nice!23:54
sbalukoffThe local Seattle clown celebrity is Patches.23:54
johnsomThat town is next door to where I grew up.  The museum had an exhibit about Bozo the clown....23:54
johnsomAnyway, probably why there is a regional difference in connotation.23:55
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sbalukoffYep.23:55

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