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ekcs | #startmeeting congressteammeeting | 04:01 |
---|---|---|
openstack | Meeting started Fri Jul 26 04:01:09 2019 UTC and is due to finish in 60 minutes. The chair is ekcs. Information about MeetBot at http://wiki.debian.org/MeetBot. | 04:01 |
openstack | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | 04:01 |
*** openstack changes topic to " (Meeting topic: congressteammeeting)" | 04:01 | |
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openstack | The meeting name has been set to 'congressteammeeting' | 04:01 |
ekcs | hello. topics kept here as usual. feel free to add yours! https://etherpad.openstack.org/p/congress-meeting-topics | 04:01 |
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akhil_jain | ekcs: hi | 04:01 |
ekcs | hi akhil_jain ! how’s it been? | 04:01 |
akhil_jain | very much busy days | 04:02 |
akhil_jain | sorry for long un-announced inactivity | 04:02 |
akhil_jain | i have been relocating to other state, with new job in IBM | 04:03 |
ekcs | haha got it. hope it’s been good though! | 04:03 |
ekcs | oh wait new employer? | 04:03 |
akhil_jain | yup | 04:03 |
ekcs | oh wow! congrats hope it’s a happy move! | 04:04 |
akhil_jain | new role as well(will be more on K8, terraform side), but will try my best with activity here | 04:04 |
akhil_jain | oh yes thanks, missing old job as well enjoying new one | 04:05 |
ekcs | very exciting! hope to learn more from you on those topics =) | 04:05 |
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akhil_jain | yes sure | 04:06 |
ekcs | I’ve been pulled away by stuff too. been bogged down with vmware internal work past few weeks. definitely looking forward to refocusing on congress though. | 04:07 |
ekcs | #topic summit presentations | 04:07 |
*** openstack changes topic to "summit presentations (Meeting topic: congressteammeeting)" | 04:07 | |
akhil_jain | is result out? | 04:08 |
ekcs | well the only topic I have now is just a update that I submitted a talk for using congress with monasca analytics to do predictive fault management. | 04:08 |
ekcs | result not out yet. | 04:08 |
akhil_jain | oh ok | 04:09 |
ekcs | I found one of the main contributors to monasca analytics with an interest in the area. pretty interesting work but not sure if it’ll be accepted or not. | 04:09 |
ekcs | I didn’t get to add you at the submission but thought we could add you after. though not sure if you have time for that now. we can talk about if offline. | 04:10 |
ekcs | oh I guess the voting is open now! | 04:11 |
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ekcs | oh nvm it’s closed now. | 04:11 |
akhil_jain | yes will be bit busy with catching up with new role here | 04:11 |
akhil_jain | thanks for considering | 04:11 |
ekcs | ok I don’t have anything else for today. very nice to catch up and hear the exciting news though! | 04:12 |
akhil_jain | haha, yes that great. | 04:13 |
akhil_jain | nothing else from my side | 04:13 |
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ekcs | alright let’s end the meeting here than! | 04:16 |
ekcs | have a great weekend! | 04:16 |
ekcs | #endmeeting | 04:16 |
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 04:16 | |
openstack | Meeting ended Fri Jul 26 04:16:15 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 04:16 |
openstack | Minutes: http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-07-26-04.01.html | 04:16 |
openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-07-26-04.01.txt | 04:16 |
openstack | Log: http://eavesdrop.openstack.org/meetings/congressteammeeting/2019/congressteammeeting.2019-07-26-04.01.log.html | 04:16 |
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mlavalle | #startmeeting neutron_drivers | 14:00 |
openstack | Meeting started Fri Jul 26 14:00:10 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 | |
openstack | The meeting name has been set to 'neutron_drivers' | 14:00 |
slaweq | hi | 14:00 |
mlavalle | hey | 14:00 |
yamamoto | hi | 14:00 |
amotoki | hi | 14:00 |
ralonsoh | hi | 14:00 |
liuyulong | hello | 14:00 |
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mlavalle | haleyb|away: is off on vacation, so we are good to go | 14:01 |
mlavalle | #topic RFEs | 14:01 |
*** openstack changes topic to "RFEs (Meeting topic: neutron_drivers)" | 14:01 | |
mlavalle | Good to see yamamoto is recovered from his surgery. \o/ | 14:02 |
amotoki | \o/ | 14:02 |
yamamoto | thank you | 14:02 |
njohnston | o/ | 14:02 |
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mlavalle | This is the RFE to be discussed today: https://bugs.launchpad.net/neutron/+bug/1836834 | 14:02 |
openstack | Launchpad bug 1836834 in neutron "[RFE] introduce distributed locks to ipam" [Wishlist,Confirmed] - Assigned to qinhaizhong (qinhaizhong) | 14:02 |
mlavalle | and its associated spec: https://review.opendev.org/#/c/657221/ | 14:03 |
brinzhang | this spec already +2, maybe need some others propose changes or W+1 | 14:06 |
njohnston | I will say that the spec is lacking a bit of detail on the basic operation of this proposal. For example, we are implementing distributed locks, but what precisely is getting locked? If a process fails to release a lock, how is that sensed and remedied? | 14:06 |
slaweq | for me it looks good as separate driver | 14:06 |
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njohnston | Is the lock on a per-subnet basis or is it for all IPAM IP allocation? Is there a fallback mode if the backend tooz points to does not respond in a timely manner? | 14:07 |
brinzhang | I think these implementations will be reflected in the code logic, this is a new driver that you can configure to use. | 14:07 |
njohnston | brinzhang: I understand, and there are many details that will be determined at implementation. But the spec says "We will fix IP allocation conflicts by using locks" without saying *how* using locks fixes IP allocation conflicts. | 14:09 |
liuyulong | brinzhang, you may give us some brief summary about the implementation. : ) njohnston's concern is worth clarifying. | 14:10 |
brinzhang | Based on subnet-id + ip | 14:10 |
ralonsoh | I agree with njohnston . We can be relaxed with the spec description, but something more detailed could be defined in the document | 14:10 |
amotoki | njohnston: good point. the spec should clarify a basic approach and how the problem can be solved. | 14:11 |
brinzhang | njohnston: qinhaizhong will be attendance, wait please. | 14:11 |
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mlavalle | the other question is, how much experience does the team proposing this spec have with tooz? I mean, have you solved previous scale up problems using it? | 14:12 |
slaweq | I was thinking about this spec more like some overall description of problem and wanted to see implementation details as PoC and to check if it will really improve IPAM, but I can also wait for some more detailed spec | 14:13 |
slaweq | mlavalle: I don't have much experience with tooz but I know that when lucasgomes implemented some "hash ring" mechanism in networking-ovn using tooz, it speed up process of creating trunk subports about 10 times or something like that, so it may help with such problems for sure | 14:14 |
njohnston | I don't think there has to be a deep deep description, just a few sentences laying out the approach so it's transparent to the community why this is a superior approach | 14:15 |
liuyulong | Moreover, this will introduce a new lock store? What if the lock DB is down? No port can be created successfully? | 14:15 |
mlavalle | I am not doubting tooz. I just want evidence that it has chances to help indeed | 14:15 |
mlavalle | and the ovn experience you mention is a good data point. thanks for mentioning it | 14:16 |
ralonsoh | liuyulong, I don't think this rely on the same DB, but I'm not sure | 14:16 |
slaweq | mlavalle: I understand, and IMO best evidence would be if we would have PoC and could compare it with current driver :) | 14:16 |
ralonsoh | slaweq, agree | 14:17 |
brinzhang | slaweq: I agree. | 14:17 |
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liuyulong | ralonsoh, tooz can use various store drivers, like redis, mysql and so on. | 14:17 |
ralonsoh | (and a more detailed description in the spec) | 14:17 |
njohnston | If the authors wanted to work out the details in a POC and then update the spec with a concise description of the approach once they have worked it out, I think that would allay my concerns about transparency | 14:17 |
ralonsoh | liuyulong, I know, just guessing | 14:17 |
slaweq | njohnston++ | 14:18 |
amotoki | njohnston: agree | 14:19 |
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brinzhang | qinhaizhong01: njohnston: I was thinking about this spec more like some overall description of problem and wanted to see implementation details as PoC and to check if it will really improve IPAM, but I can also wait for some more detailed spec | 14:20 |
brinzhang | mlavalle: I don't have much experience with tooz but I know that when lucasgomes implemented some "hash ring" mechanism in networking-ovn using tooz, it speed up process of creating trunk subports about 10 times or something like that, so it may help with such problems for sure | 14:20 |
mlavalle | Performance and scalibility improvement is very important for Neutro | 14:21 |
mlavalle | Neutron | 14:21 |
qinhaizhong01 | Based on the original _generate_ips algorithm, this method will be reimplemented. The ips calculated for _generate_ips will be "ip+subnet_id" as the key plus the distributed lock. | 14:21 |
mlavalle | So I like in principle this proposal, even in an exploratory fashion | 14:22 |
liuyulong | Introduce such centralized components, always increase the deployment difficulties of operation and maintenance. (I'm not saying this is not acceptable, just some thoughts.) | 14:22 |
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amotoki | I would like to see why and how a distributed lock addresses the problem in the spec. | 14:22 |
mlavalle | with that in mind and seeing the feedback from the team, this is what we propose: | 14:23 |
mlavalle | 1) We approve the RFE today with the understanding that | 14:23 |
mlavalle | 2) A more detailed spec will be proposed with the feedback from the team today | 14:24 |
mlavalle | 3) We will see the code as a PoC. We will use the experience of the PoC to feedback on the spec if needed | 14:24 |
njohnston | +1 | 14:24 |
mlavalle | 4) The code will come with Rally tests, so we can measure improvement | 14:25 |
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mlavalle | IMO, we should welcoming experimenting | 14:26 |
mlavalle | what do others think? | 14:26 |
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liuyulong | +1 | 14:26 |
amotoki | it totally makes sense to me | 14:26 |
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slaweq | +! | 14:26 |
yamamoto | +1 | 14:26 |
slaweq | +1 | 14:26 |
njohnston | I really like that approach | 14:26 |
brinzhang | +1 | 14:26 |
ralonsoh | +1 | 14:27 |
mlavalle | brinzhang, qinhaizhong01: let me be clear. we are heading towards the final milestone of the cycle. And we are taking this proposal as a PoC. So the chances of this merging in TRain are rather slim. ok? | 14:28 |
mlavalle | I'll take the silence as acquiescence :-) | 14:30 |
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mlavalle | I'll approve the RFE at the end of the meeting, adding the four points ^^^^ in the comments section | 14:31 |
mlavalle | Let's move on then | 14:32 |
mlavalle | Next one we have today is https://bugs.launchpad.net/neutron/+bug/1837847 | 14:32 |
openstack | Launchpad bug 1837847 in neutron "[RFE] neutron-vpnaas OpenVPN driver" [Undecided,New] | 14:32 |
mlavalle | I am not sure we should discuss it today. I don't understand all the details in this proposal | 14:33 |
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mlavalle | I am bringing it up today with the hope that amotoki and yamamoto who know more about VPN could comment on it and help us triage it | 14:33 |
brinzhang | mlavalle: where let you confusing? | 14:33 |
qinhaizhong01 | What details? | 14:34 |
mlavalle | I am talking now about another RFE, not yours brinzhang ann qinhaizhong01 | 14:34 |
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amotoki | I haven't looked at the OpenVPN driver RFE... | 14:36 |
slaweq | I'm not vpnaas expert so it's hard for me to talk about it | 14:36 |
njohnston | When he says his use case is to have broadcast/multicast communication with the instances, does that mean the vpn IP needs to be within the same L2 domain? | 14:36 |
mlavalle | good question to ask in the RFE | 14:37 |
njohnston | If so, then I don't see how going through Neutron IPAM can be avoided, whether it's in a pre-reservation capacity or on-demand. | 14:37 |
* njohnston posts the question | 14:38 | |
mlavalle | Thanks! | 14:38 |
amotoki | njohnston is much faster than me. | 14:39 |
liuyulong | Looks like it will involved with DHCP? A spec with some detail is needed also. | 14:39 |
amotoki | At a glance, I cannot understand that point and am thinking.... | 14:39 |
amotoki | liuyulong: perhaps we need to understand what is the actual problem first before a spec. | 14:40 |
liuyulong | A spec always has the section "Problem Description" : ) | 14:41 |
mlavalle | ok, let's post questions in the RFE and see if we can move it forward | 14:41 |
mlavalle | anythong else we should discuss today? | 14:42 |
liuyulong | I have one | 14:42 |
liuyulong | https://bugs.launchpad.net/neutron/+bug/1817881 | 14:43 |
openstack | Launchpad bug 1817881 in neutron " [RFE] L3 IPs monitor/metering via current QoS functionality (tc filters)" [Wishlist,In progress] - Assigned to LIU Yulong (dragon889) | 14:43 |
liuyulong | We discussed this once in drivers meeting. | 14:43 |
liuyulong | But we have no result. | 14:43 |
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liuyulong | Basicly we have a consensus is adding a new l3 agent extension. | 14:43 |
liuyulong | But it is not approved yet. | 14:43 |
slaweq | one question: is it still proposal only for FIPs with QoS set? | 14:44 |
liuyulong | slaweq, it relay on that, the tc statistics. | 14:45 |
slaweq | can't we use tc statistics without QoS enabled for FIP? | 14:46 |
slaweq | it doesn't look like something user friendly: "do You want metering, You need to set QoS on FIP" :) | 14:46 |
liuyulong | I'm not sure, but I can. Once tc filters accept 0 for rate and burst. | 14:46 |
liuyulong | But now, we may need a very large value for it as default. | 14:47 |
slaweq | if we want to have metering enabled, it should be done for all FIPs/routers handled by L3 agent | 14:47 |
ralonsoh | slaweq, we need to measure the possible performance impact | 14:47 |
slaweq | and should be independent of QoS feature | 14:48 |
ralonsoh | if we are adding a TC filter in a interface, without needing it, this can slow down it | 14:48 |
liuyulong | Bandwidth limitation and metering of public IP is a basic rule. | 14:48 |
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amotoki | liuyulong: do you mean all deployments should have bandwidth limitation and metering of public IPs? | 14:49 |
mlavalle | but we only need the TC filter if the operator configures metering, right? | 14:49 |
mlavalle | in this scenario I mean | 14:49 |
ralonsoh | mlavalle, right now yes | 14:49 |
ralonsoh | sorry, we have TC filters if we ask for QoS | 14:49 |
liuyulong | FYI, the discuss once: http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-03-29-14.00.log.html | 14:49 |
slaweq | mlavalle: yes, and IMO it should be like that: "You want metering - You should enable metering in config file" and not "You want metering - You should enable QoS for FIP with some custom, very high value for bw limit" :) | 14:50 |
liuyulong | mlavalle, yes, tc filter rule is enough. It has a accurate statistics data. | 14:51 |
mlavalle | so will slaweq's point be addressed? | 14:51 |
liuyulong | amotoki, no, it is not a compulsory requirements, I mean it's more like a deployment consensus. | 14:52 |
liuyulong | So, what's value will be considered as very large for filter default? | 14:53 |
liuyulong | 10Gpbs? | 14:53 |
liuyulong | 40Gbps? | 14:53 |
ralonsoh | ConnectX-6 HCAs with 200Gbps | 14:54 |
ralonsoh | from the Mellanox website | 14:54 |
liuyulong | Haha, It seems that there will always be higher values. | 14:55 |
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slaweq | there is spec for this, I will try to review it in next few days, will it be ok liuyulong? | 14:58 |
liuyulong | slaweq, OK, let me paste it here. | 14:58 |
liuyulong | #link https://review.opendev.org/#/c/658511/ | 14:58 |
slaweq | liuyulong: thx | 14:58 |
liuyulong | Title " | 14:59 |
liuyulong | L3 agent self-service metering" | 14:59 |
mlavalle | ok, let's all review the spec and we start with this RFE next week | 14:59 |
slaweq | mlavalle++ | 14:59 |
mlavalle | Have a nice weekend | 14:59 |
mlavalle | #endmeeting | 14:59 |
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/" | 14:59 | |
openstack | Meeting ended Fri Jul 26 14:59:48 2019 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4) | 14:59 |
slaweq | thx, You too mlavalle | 14:59 |
openstack | Minutes: http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-07-26-14.00.html | 14:59 |
ralonsoh | bye | 14:59 |
openstack | Minutes (text): http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-07-26-14.00.txt | 14:59 |
amotoki | thanks all | 14:59 |
openstack | Log: http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-07-26-14.00.log.html | 14:59 |
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