Friday, 2019-08-16

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mlavalle#startmeeting neutron_drivers14:00
openstackMeeting started Fri Aug 16 14:00:04 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
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.14:00
*** openstack changes topic to " (Meeting topic: neutron_drivers)"14:00
openstackThe meeting name has been set to 'neutron_drivers'14:00
njohnstono/14:00
slaweqhi14:00
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mlavallelet's wait a couple of minutes14:01
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mlavallemhhhh, maybe the others are off today14:07
mlavalleamotoki most likely14:07
mlavallelet's wait a few more minutes14:08
haleybhi14:09
mlavallethere he is14:09
mlavallenow we have quorum14:09
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slaweq\o/14:09
haleybthere was a shiny object nearby :)14:09
mlavalleso let's get going14:09
mlavalle#topic RFEs14:10
*** openstack changes topic to "RFEs (Meeting topic: neutron_drivers)"14:10
mlavallewe will start today with https://bugs.launchpad.net/neutron/+bug/183252614:10
openstackLaunchpad bug 1832526 in neutron "[RFE] Network segmentation support for edge deployments" [Wishlist,New]14:10
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slaweqmlavalle: I have some questions to Your last comment in this RFE14:14
mlavallesure14:14
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slaweqmlavalle: about point "2. Admin creates a Neutron network associated with the "Small Edge" host" -- isn't this done already by bridge mappings?14:14
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mlavalleyes and no14:15
njohnston_reading your analysis on the bug mlavalle it strikes me that this is really a subset or a special case of availability zones, is it not?14:15
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slaweqand informations about bridge_mappings are already send to the placement with info about bandwidth, am I right?14:16
mlavalleyes, but are you suggesting that this has to be associated with QoS?14:17
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mlavalleso some of the mechanisms may be already in place, but I think we need to repurpose them for this use case14:18
slaweqmlavalle: no, just saying that this should be eventually easy to accomplish as we have necessary bits already14:18
slaweqIIUC of course :)14:18
mlavalleI think we are saying the same thing14:19
mlavallemuch of the machinery is in place, but we need to adapt it14:19
slaweqok14:19
mlavallenjohnston_: I hadn't thought of that perspective14:19
mlavallebut maybe taking that perspective might help us... tell me more please14:20
mlavalleslaweq: good points though14:21
njohnstonmlavalle: Well the thrust of AZ is that instead of a single L2 domain spanning the entire region, L2 domains are bounded by the AZ which correlates to a specific set of compute/network capacity14:22
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mlavalleso one availability zone per "Small edge"?14:23
njohnstonyes, precisely.  The biggest hint that this RFE aligns with AZs is the explicit statement that connectivity between small edge sites cannot be guaranteed, which matches up with how the mesh does not stretch across AZ boundaries14:24
mlavalleso if we take that perspective, do we get this RFE for free?14:25
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njohnstonI am thinking it through but I don't see any gaps yet14:25
slaweqI don't think we will have this RFE for free then14:25
njohnstonI'm not an expert in availability zones so I am glad for those with more expertise to weigh in14:26
slaweqas now networks in neutron are not aware of availability zone and can works in many zones, so still You will need IMO some mechanism to assign network to the AZ, right?14:26
mlavalleslaweq: that is also my understanding14:27
slaweqcurrently in Neutron only L3 and DHCP agents are somehow aware of AZs but I'm not sure exactly how this works tbh14:27
njohnstonIsn't there a network_availability_zone extension that provides support of availability zone for networks?14:28
njohnstonhttps://docs.openstack.org/api-ref/network/v2/?expanded=list-all-availability-zones-detail#network-availability-zone-extension14:28
slaweqnjohnston: tbh I don't know :)14:29
* mlavalle looking quickly at the code14:29
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slaweqone more thing, there is also this rfe https://bugs.launchpad.net/neutron/+bug/1808062 which might be somehow related to what we are discussing now14:29
openstackLaunchpad bug 1808062 in neutron "[RFE] Limit VXLAN to within Neutron availability zones" [Wishlist,New] - Assigned to Kailun Qin (kailun.qin)14:29
njohnstonslaweq: Yes, I was thinking about that RFE, I was not sure if that had been implemented yet.  I think that would be necessary.14:30
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mlavallehere's the extension definition in nuetron-lib https://github.com/openstack/neutron-lib/blob/master/neutron_lib/api/definitions/network_availability_zone.py14:33
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slaweqso IIUC this availability zones for networks can be used to assign it to proper dhcp agent14:34
slaweqand router to proper L3 agent14:34
slaweqaccording to https://github.com/openstack/neutron/blob/0cde163967e6b1d3f7bc499dfbfbdd2c7e09930b/doc/source/admin/config-az.rst14:35
mlavallelooking at the code it seems it is only used for agents14:35
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slaweqbut maybe this rfe can be driven in this direction to extend usage of availability zones concept there14:36
njohnstonHmm, it just occurred to me - in it's interactions with neutron, is placement AZ-aware?14:36
mlavallehttps://github.com/openstack/neutron/blob/master/neutron/db/agentschedulers_db.py#L49214:37
njohnstonI like framing this as an AZ solution because it is a generalized solution that helps edge but also can be applied in other solutions.14:37
mlavalleso yeah, I agree that the AZ approach framing gives us a more generalized approach14:38
mlavalleso it boils down to what we said earlier....14:38
mlavallewe have bits and pieces that we have to put together to meet this RFE / use case14:38
mlavalleright?14:38
slaweqthat is at least my understanding of this rfe14:39
mlavalleand then we need to make sure that the placement / Nova scheduler is aware14:39
mlavalleplacement / Nova scheduler comobo^^^^14:39
njohnston+114:40
slaweqand if we would somehow reuse concept of AZs in Neutron, there would be no API changes required, right?14:41
mlavallemost likely, but let's leave it as an open question14:41
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slaweq+114:42
mlavallegiven that we need anyway to get the Nova / Placement combo guys on board, here's what I propose:14:43
mlavalle1) Since the use case makes sense, let's approve the RFE, with the understanding that:14:43
mlavalle2) We will write a spec to explore how to weave all the pieces together and identify gaps. This might involve a PoC14:44
mlavalle3) Let's try to make progress in the spec in time to discuss it in Shanghai in the session with Nova / Placement14:44
mlavalle4) I volunteer to work on 2 and 314:45
njohnston_+114:45
slaweq+1, sounds like a plan :)14:45
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mlavallewhat do you think haleyb?14:49
haleyb+1 from me14:50
mlavallecool14:50
mlavalleapproved it is14:50
mlavallenext one for today is https://bugs.launchpad.net/neutron/+bug/183784714:51
openstackLaunchpad bug 1837847 in neutron "[RFE] neutron-vpnaas OpenVPN driver" [Wishlist,Triaged]14:51
mlavallewe discussed it last week14:51
mlavalleand yamamoto posted questions14:51
mlavallewhich the submitter responded14:51
mlavallesubmitter will be off the next two weeks, so we have time to look at his response carefully14:52
mlavallewhy don't we do that and come back to it next week?14:52
njohnston_makes sense14:53
slaweqI will try to read it today and I will wrote a comment if I will have anything to add there14:54
mlavalleyes, I know slaweq will be off the next two weeks14:54
mlavalledon't worry too much about it14:54
slaweqmlavalle: actually next week only regarding this meeting14:54
slaweqI should be back on meeting in 2 weeks :)14:54
mlavalleahhh, good to know14:54
mlavalleanyways, enjoy the beach!14:55
mlavalleand the family!14:55
slaweqthx a lot14:55
mlavalleok team14:55
mlavallegreat discussion today14:55
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mlavalleI think we made a lot of progress as team with the edge case14:56
mlavallehave a great weekend!14:56
slaweqthx, You too :)14:56
njohnston_o/14:56
mlavalle#endmeeting14:56
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"14:56
slaweqo/14:56
openstackMeeting ended Fri Aug 16 14:56:43 2019 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)14:56
openstackMinutes:        http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-08-16-14.00.html14:56
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-08-16-14.00.txt14:56
openstackLog:            http://eavesdrop.openstack.org/meetings/neutron_drivers/2019/neutron_drivers.2019-08-16-14.00.log.html14:56
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