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| ekcs | #startmeeting congressteammeeting | 04:02 |
|---|---|---|
| openstack | Meeting started Fri Mar 8 04:02:17 2019 UTC and is due to finish in 60 minutes. The chair is ekcs. Information about MeetBot at http://wiki.debian.org/MeetBot. | 04:02 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 04:02 |
| *** openstack changes topic to " (Meeting topic: congressteammeeting)" | 04:02 | |
| openstack | The meeting name has been set to 'congressteammeeting' | 04:02 |
| ekcs | hello! happy friday. | 04:02 |
| ekcs | topics kept here as usual: https://etherpad.openstack.org/p/congress-meeting-topics | 04:02 |
| akhil_jain | ekcs: Hi | 04:04 |
| ekcs | hi akhil_jain ! how’s it been? | 04:04 |
| akhil_jain | I joined NEC India office this wednesday. and whole time zone change thing happening | 04:05 |
| akhil_jain | What about you? | 04:05 |
| ekcs | oh wow you’re done with your japan rotation already huh? time flies! | 04:07 |
| ekcs | I’m doing alright! had to scramble, but happy about how much progress is done on json ingester this cycle. | 04:08 |
| akhil_jain | Yes seriously, it was 3months | 04:08 |
| akhil_jain | seen your work, seems really busy | 04:09 |
| ekcs | yea hope you get all settled back in soon! | 04:09 |
| ekcs | ok let’s start off then. | 04:09 |
| akhil_jain | yes, everything is set now. | 04:09 |
| ekcs | #topic RC1 | 04:09 |
| *** openstack changes topic to "RC1 (Meeting topic: congressteammeeting)" | 04:09 | |
| ekcs | Quick reminder that we are now past the feature freeze deadline. We got some great features in for the stein cycle. And RC1 is due in two weeks. What that means is that our focus should be on tests, bugs, and docs. | 04:10 |
| ekcs | Any featureful patch we feel really need to go in can still be done, but would require a feature-freeze exception. | 04:11 |
| ekcs | RC1 release is due on 3/21 at the latest. let’s shoot to have patches submitted before 3/18 to have time for review and testing before the RC1 release. | 04:14 |
| ekcs | I have also listed in the agenda etherpad some of the tasks we hope to finish by RC1. Am I missing anything? | 04:15 |
| akhil_jain | I think that will be it | 04:16 |
| ekcs | great! feel free to add to it if anything else comes to mind. | 04:19 |
| akhil_jain | ok great | 04:20 |
| ekcs | #topic other | 04:20 |
| *** openstack changes topic to "other (Meeting topic: congressteammeeting)" | 04:20 | |
| ekcs | cool that’s the only topic I needed to cover. anything else to discuss today? | 04:21 |
| ekcs | just mention real quick the ongoing discussion around congress execution semantics. | 04:21 |
| ekcs | I prepared an etherpad here to facilitate further discussion: #link https://etherpad.openstack.org/p/congress-exec-semantics-cases | 04:21 |
| akhil_jain | Thats great work Eric really appreciate. I will go through it | 04:23 |
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| ekcs | thanks! looking forward to clearly understanding the scenarios and what they require so we can design the right semantics. | 04:24 |
| akhil_jain | I thinks these solutions from your end are going to help, definitely | 04:26 |
| ekcs | great! | 04:29 |
| ekcs | well if there’s nothing else for today I guess we can wrap up? | 04:29 |
| akhil_jain | yes nothing from my side | 04:30 |
| ekcs | alright then! have a good weekend! | 04:31 |
| akhil_jain | Thanks and same to you | 04:31 |
| ekcs | bye! | 04:32 |
| ekcs | #endmeeting | 04:32 |
| *** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 04:32 | |
| openstack | Meeting ended Fri Mar 8 04:32:11 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 04:32 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-03-08-04.02.html | 04:32 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-03-08-04.02.txt | 04:32 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-03-08-04.02.log.html | 04:32 |
| akhil_jain | bye! | 04:32 |
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| mlavalle | #startmeeting neutron_drivers | 14:00 |
| openstack | Meeting started Fri Mar 8 14:00:35 2019 UTC and is due to finish in 60 minutes. The chair is mlavalle. Information about MeetBot at http://wiki.debian.org/MeetBot. | 14:00 |
| openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 14:00 |
| *** openstack changes topic to " (Meeting topic: neutron_drivers)" | 14:00 | |
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| openstack | The meeting name has been set to 'neutron_drivers' | 14:00 |
| haleyb | hi | 14:00 |
| yamamoto | hi | 14:00 |
| doreilly | hi | 14:01 |
| mlavalle | Good evening / good morning | 14:01 |
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| mlavalle | doreilly: do you have anything to discuss in this meeting? | 14:01 |
| slaweq | hi | 14:02 |
| doreilly | yeah, the inactivity_probe thing | 14:02 |
| njohnston_ | o/ | 14:03 |
| mlavalle | doreilly: welcome. I have that rfe scheduled to be discussed today. I just didn't want to waste your time if your item wasn't scheduled | 14:03 |
| doreilly | ok good | 14:03 |
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| mlavalle | let's wait 1 more minute for amotoki | 14:04 |
| mlavalle | ok, let's get going | 14:05 |
| mlavalle | #topic RFEs | 14:05 |
| *** openstack changes topic to "RFEs (Meeting topic: neutron_drivers)" | 14:05 | |
| mlavalle | as mentioned in the exchange with doreilly, the first RFE to discuss today is https://bugs.launchpad.net/neutron/+bug/1817022 | 14:06 |
| openstack | Launchpad bug 1817022 in neutron "[RFE] set inactivity_probe and max_backoff for OVS bridge controller" [Wishlist,In progress] - Assigned to Darragh O'Reilly (darragh-oreilly) | 14:06 |
| doreilly | I have a customer who says that bumping it to 15000ms helps with vif timeout issues on a heavt loaded system | 14:06 |
| mlavalle | doreilly: let's give the team a few minutes to read the RFE and then questions will come ;-) | 14:06 |
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| slaweq | ok, what "issue" we can have when we set much longer time for this? | 14:08 |
| doreilly | slaweq: not sure, maybe longer to reconnect | 14:09 |
| doreilly | the default is 5seconds. It is up to people if they want to increase it using this RFE | 14:10 |
| slaweq | I'm generally ok to change this to some bigger value if that is reasonable | 14:10 |
| doreilly | ok. Like to 10sec? | 14:11 |
| mlavalle | well, the proposal is to enable users and deployers to change it: https://review.openstack.org/#/c/641681/1/neutron/conf/plugins/ml2/drivers/ovs_conf.py | 14:11 |
| slaweq | but my concern is do we really need to add config options for it? | 14:11 |
| mlavalle | if we don't have a strong position on what those values should be, I think they should be a config option | 14:12 |
| slaweq | sure, I'm just thinking loud now :) | 14:13 |
| yamamoto | doreilly: what's "vif timeout issues"? | 14:13 |
| doreilly | could not really get specific details from them | 14:14 |
| haleyb | and how does the new inactivity_probe config interact with the existing based on ovsdb_timeout for the manager? | 14:14 |
| slaweq | You said in bug report that it may happend "under the heavy load in neutron-ovs-agent" - what is exactly this high load here? Many ports to configure? Many ports already configured and existing in ovs bridge? | 14:14 |
| doreilly | but they really need to bump of_request_timeout first | 14:14 |
| doreilly | haleyb, it does not interact. | 14:15 |
| haleyb | doreilly: should it override that value? | 14:15 |
| doreilly | slaweq, about 2500 iptables-rules, I think is the problem | 14:15 |
| doreilly | slaweq: a lot of change on the system. Many vms created/deleted together | 14:16 |
| slaweq | ok, thx doreilly | 14:17 |
| doreilly | slaweq: security group rules that reference other security groups | 14:17 |
| slaweq | one more question: is it maybe somehow possible (and worth to do) to change it dynamically? e.g. many port updates in loop, increase this value, all idle, decrease it or something like that. | 14:18 |
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| haleyb | slaweq: like increase if we see timeouts? | 14:19 |
| slaweq | haleyb: for example, that could works imho | 14:19 |
| doreilly | slaweq, probably, but would be a good deal more complex | 14:19 |
| slaweq | I'm trying to think about some smarter way than adding another knob to our config | 14:19 |
| mlavalle | well, the bug description states that the parameters can be set manually after an ovs agent reatsrt | 14:20 |
| mlavalle | the commands are provided then | 14:20 |
| njohnston_ | an exponential backoff algorithm would perhaps work, so that if we see a vif timeout we can retry but the timeout is higher, and then after things quiesce the timeouts go back to normal | 14:20 |
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| mlavalle | sso is it really feasible to do it automatically? | 14:21 |
| slaweq | I think we have already something like that with rpc connections in ovs agent | 14:21 |
| yamamoto | i suspect it isn't just a "busy" agent. it's more like something prevents ryu send/receive threads from being scheduled i guess. | 14:22 |
| doreilly | yamamoto, I agree | 14:23 |
| doreilly | I think the agent is bogged down with iptables, and cannot reply to the echo-request | 14:24 |
| yamamoto | like, something blocking the whole process, bypassing eventlet | 14:24 |
| doreilly | yamamoto: I think so | 14:25 |
| yamamoto | i'm not against the proposal. it might be useful for some situations. but i don't think it's a real fix. | 14:27 |
| mlavalle | yamamoto: how could we go about finding the root cause and real fix? | 14:28 |
| mlavalle | doreilly: we are basing this in one deployer experience / feedback, right? | 14:28 |
| doreilly | yes | 14:29 |
| mlavalle | would that deployer be open to dig deeper? | 14:29 |
| njohnston_ | Are we OK with having soem vif timeouts and reacting to that, or is it important to try to avoid them before they happen? | 14:29 |
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| doreilly | njohnston_, I think it is better to avoid, because want to avoid full resync | 14:30 |
| mlavalle | yeah, especially in a hevily loaded system | 14:30 |
| njohnston_ | yes that makes sense | 14:30 |
| slaweq | yes, that's true | 14:31 |
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| slaweq | what if we would set some big number (hardcoded)? | 14:31 |
| mlavalle | yamamoto: in the bug they point to an irc conversation you had with kevinbenton. do you recall it? is it relevant to this discussion? | 14:32 |
| yamamoto | i guess it's difficult to find the root cause. having a canary thread sensitive to scheduling latency might be useful for debugging. eventlet itself might have those kind of debug mechanism. | 14:32 |
| yamamoto | i remeber it. but i'm not sure if it's the root cause is the same. | 14:33 |
| yamamoto | the issue discussed in the irc conversation was on our CI env. it might be a vcpu hiccup or something like that. | 14:33 |
| yamamoto | we observed ovs agent not producing any log messages for very long period when reconnect happened. | 14:35 |
| mlavalle | yamamoto: would you be willing to provide some guidance in that debugging process? | 14:35 |
| mlavalle | feel free to just say no. don't feel pressured ;-) | 14:36 |
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| yamamoto | https://github.com/eventlet/eventlet/blob/master/eventlet/debug.py#L153 | 14:37 |
| yamamoto | this seems relevant as far as i read the comment | 14:38 |
| yamamoto | it depends on what kind of guidance they need | 14:39 |
| mlavalle | You set the limit | 14:39 |
| mlavalle | doreilly: would you and your client be open to further investigation? | 14:40 |
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| doreilly | not really, it is a production system, so cannot do mods like that | 14:40 |
| mlavalle | ok | 14:40 |
| mlavalle | yamamoto: nevermind. thanks for the openess | 14:41 |
| liuyulong_ | doreilly, maybe you can also take look at this bug: https://bugs.launchpad.net/neutron/+bug/1813703 | 14:41 |
| openstack | Launchpad bug 1813703 in neutron "[L2] [summary] ovs-agent issues at large scale" [High,In progress] - Assigned to LIU Yulong (dragon889) | 14:41 |
| doreilly | I cannot reproduce disconect/reconnect messages in my lab | 14:41 |
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| doreilly | but ovs-vswitchd reconnects and everything is okay. I dont see errors in the ovs-agent. | 14:42 |
| liuyulong_ | doreilly, you can take this method to reproduce the timeout http://paste.openstack.org/show/745685/ | 14:42 |
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| doreilly | liuyulong_, yep that's basically what I do. I launch 100 debug probes, with lots of sg rules | 14:43 |
| yamamoto | doreilly: have you tried to make inactivity_probe shorter than default? | 14:44 |
| doreilly | I will try the eventlet debug in the lab, to try to find root cause | 14:44 |
| doreilly | yamamoto, min is 5000ms | 14:45 |
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| doreilly | yamamoto, I don't think its possible to go lower. Hardcoded in OVS | 14:45 |
| yamamoto | you can modify ovs then | 14:45 |
| doreilly | yamamoto, I could | 14:46 |
| mlavalle | doreilly: so, if you are open to do some digging in your lab, let's go ahead and do that. You will be at the top of our agenda next time when you are ready. would that work? | 14:47 |
| doreilly | ok thanks for the time | 14:48 |
| mlavalle | doreilly: on the contrary, thanks for your time and efforts | 14:48 |
| mlavalle | doreilly: just ad a note to the RFE when you are ready. I monitor them every week, before the meeting (Thursday evening US central time zone) | 14:49 |
| doreilly | mlavalle, okay will do | 14:50 |
| mlavalle | doreilly: and if you add whatever partial results / findings to the RFE, we can discuss them there also | 14:50 |
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| mlavalle | ok, let's move on | 14:51 |
| mlavalle | Next one is https://bugs.launchpad.net/neutron/+bug/1817881 | 14:52 |
| openstack | Launchpad bug 1817881 in neutron " [RFE] L3 IPs monitor/metering via current QoS functionality (tc filters)" [Wishlist,New] | 14:52 |
| mlavalle | We might not have time to fisnish the discussion today, but at least we can get acquianted with the proposal | 14:52 |
| mlavalle | and take advantage that liuyulong_ is here | 14:52 |
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| liuyulong_ | OK, it is for L3 IPs metering. | 14:54 |
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| liuyulong_ | L3 IPs are all have QoS bandwidth limit now based or linux TC filters. | 14:55 |
| liuyulong_ | This is an example: | 14:56 |
| liuyulong_ | # ip netns exec snat-867e1473-4495-4513-8759-dee4cb1b9cef tc -s -d -p filter show dev qg-91293cf7-64 | 14:56 |
| liuyulong_ | Sent 17640 bytes 180 pkts (dropped 0, overlimits 0) | 14:56 |
| slaweq | liuyulong_: but will it work only for FIPs with QoS associated? | 14:56 |
| slaweq | or for all? | 14:56 |
| liuyulong_ | For floating IPs with binding QoS only. | 14:56 |
| mlavalle | so, it's not a total replacement for the current metering approach | 14:57 |
| liuyulong_ | This is a very strong demand from different cloud users. | 14:57 |
| liuyulong_ | No, it is a simple alternative. | 14:58 |
| mlavalle | understood | 14:58 |
| mlavalle | if we move ahead with this, we would need to be very clear with the use case / cases this is intended to cover | 14:59 |
| mlavalle | and with that, let's continue here next week | 14:59 |
| mlavalle | Thanks for attending | 14:59 |
| liuyulong_ | Floating IPs should always have bandwidth constraints. We can not open all the bandwidth to all the user all the time. | 14:59 |
| liuyulong_ | OK | 14:59 |
| mlavalle | have a great weekend! | 14:59 |
| mlavalle | #endmeeting | 15:00 |
| slaweq | thx, You too :) | 15:00 |
| *** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 15:00 | |
| slaweq | o/ | 15:00 |
| openstack | Meeting ended Fri Mar 8 15:00:06 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 15:00 |
| openstack | Minutes: http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-03-08-14.00.html | 15:00 |
| openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-03-08-14.00.txt | 15:00 |
| openstack | Log: http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-03-08-14.00.log.html | 15:00 |
| haleyb | o/ | 15:00 |
| yamamoto | good night | 15:00 |
| doreilly | thx bye | 15:00 |
| mlavalle | yamamoto: yeah, have a restful night | 15:00 |
| mlavalle | doreilly: thanks for attending. Are you in Ireland? | 15:00 |
| doreilly | i am | 15:01 |
| mlavalle | doreilly: thnks for staying with us so late on a Friday evening. You must be loosing valuable beer time ;-) | 15:03 |
| doreilly | mlavalle, it's only 1500 here | 15:03 |
| mlavalle | Guiness time that is ^^^ | 15:03 |
| mlavalle | oh ok | 15:03 |
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| mlavalle | close to beer o'clock anyway | 15:04 |
| ralonsoh | mlavalle, not yet, but in a couple of hours will be time for this here | 15:04 |
| mlavalle | ralonsoh: salud entonces! | 15:04 |
| ralonsoh | doreilly, another "Irish" folk here in Limerick | 15:04 |
| doreilly | ralonsoh, hi i'm in galway | 15:06 |
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