Friday, 2020-06-26

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slaweq#startmeeting neutron_drivers14:00
openstackMeeting started Fri Jun 26 14:00:30 2020 UTC and is due to finish in 60 minutes.  The chair is slaweq. Information about MeetBot at http://wiki.debian.org/MeetBot.14:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.14:00
slaweqhi14:00
*** openstack changes topic to " (Meeting topic: neutron_drivers)"14:00
openstackThe meeting name has been set to 'neutron_drivers'14:00
ralonsohhi14:00
lajoskatonao/14:00
mlavalleo/14:00
haleybo/14:01
slaweqlets wait few more minutes for yamamoto and amotoki14:01
slaweqnjohnston: told me just that he will be a bit late14:01
yamamotojo14:01
slaweqhi yamamoto14:01
slaweqok, I think we can start14:04
slaweq#topic RFEs14:04
*** openstack changes topic to "RFEs (Meeting topic: neutron_drivers)"14:04
slaweqwe have 2 RFEs to discuss today14:04
slaweqfirst one is:14:04
slaweq#link https://bugs.launchpad.net/neutron/+bug/188280414:04
openstackLaunchpad bug 1882804 in neutron "RFE: allow replacing the QoS policy of bound port" [Undecided,New] - Assigned to Lajos Katona (lajos-katona)14:04
lajoskatonaThis one was proposed by Gibi14:05
lajoskatonaduring the PTG perhaps14:05
slaweqyes, and it's follow up after the PTG14:06
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lajoskatonaAs I see the proposed usecase is limited and discuss only the case when new QoS policy (with min bw) is set to the port that is bound.14:06
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lajoskatonaexactly, so no radial change in how things work now14:07
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slaweqI know we talked about it and we agreed with Nova that this should be the way to go14:08
lajoskatonaWhat is a cost that if it will work port update can go to placement and fetch allocations for the Resource Provider, and do change if the QoS policy bandwidth is different from the original bandwidth14:08
slaweqso neutron will tell placement about new resource usage14:08
lajoskatonayes14:09
slaweqlajoskatona: one question - are our drivers already prepared to update such min bandwidth for port or this also has to be implemented?14:10
ralonsohI think both are different topics, scheduling enforcement and backend enforcement14:11
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lajoskatonaslaweq: yes Ralonsoh is right a I see14:12
ralonsohcurrently we don't allow min-bw changes, is that correct?14:12
lajoskatonawe can do this from qos service plugin as I checked14:12
lajoskatonaralonsoh: that is again a different usecase, first I messed it up as well14:13
lajoskatonathat is changing the policy of a Qos policy that is attached to a port14:13
lajoskatonathis RFE is about updating the port's QoS policy with a new on that has different min_bw value14:14
ralonsohright14:14
lajoskatonato tell the truth I am not sure if the 2 can be covered with one step14:14
lajoskatonaso checked only the one described in the RFE14:14
slaweqok, so this rfe is only about scheduling/tracking available resources part - I'm fine with that14:15
slaweqand I'm ok with approving this rfe14:16
njohnstono/14:16
haleyb+114:17
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njohnston+1 that sounds reasonable (just finished reading the scrollback)14:18
mlavalle+114:18
yamamoto+114:21
slaweqok, I will mark this rfe as approved14:21
slaweqlajoskatona: are You going to work on this in Victoria?14:21
lajoskatonaslaweq: Yes I planned it14:22
slaweqok, that's great14:22
slaweqthx lajos14:22
slaweq*lajoskatona :)14:22
slaweqok, next rfe14:23
slaweq#link https://bugs.launchpad.net/neutron/+bug/182849414:23
openstackLaunchpad bug 1828494 in neutron "[RFE][L3] l3-agent should have its capacity" [Wishlist,In progress] - Assigned to LIU Yulong (dragon889)14:23
slaweqthis one was discussed few times already14:23
lajoskatonaThanks for discussion14:23
slaweqbut recently liuyulong changed it to use "max_routers" parameter for L3 agent14:23
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slaweqand add new scheduler driver which will not schedule to the agent more routers than agent's max_routers value14:24
slaweqso I wanted to ask You what do You think about it :)14:24
ralonsohso is "just" to add a new filter/weight to the l3 agent scheduling, right?14:28
slaweqralonsoh: I think so14:28
ralonsohwe can model, in placement API, the BW of the physical resources14:29
ralonsohshould this use this model too?14:29
slaweqbut now when I think about it I'm not sure how neutron will tell user that there was no available L3 agents to schedule router14:29
slaweqralonsoh: this was proposed initially IIRC but liuyulong didn't want to use placement there, that's why we proposed this easier parameter which is max_routers14:30
slaweqthere is spec proposed also https://review.opendev.org/#/c/658451/ but it isn't updated yet14:30
ralonsohahhh I see14:31
mlavalleso what we are discussing is the "routers_max" option?14:31
slaweqmlavalle: my understanding is that RFE is now about using "routers_max" config option in L3 agent14:32
slaweqand add new scheduler driver which will respect this value14:32
slaweqdetails can be discussed in the spec's review14:32
ralonsoh(that changes completely the current spec)14:33
slaweqlike e.g. what to do if there is no available L3 agents to schedule new router14:33
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ralonsohthis parameter and the way of counting this is easier14:33
ralonsohand you don't need to model those "external_interfaces" in the config14:33
slaweqralonsoh: I agree - it's much easier IMO now14:33
mlavalleI would be ok approving this RFE on that assumption and moving to the detailed discussion in the spec14:35
slaweqmlavalle: that'14:35
slaweqthat's exactly what I wanted to propose :)14:35
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slaweqhaleyb: yamamoto njohnston: any thoughts?14:38
haleybi'm fine with it assuming an update as well14:38
yamamotoi like the simplicity (compared to the original bandwidth thing)14:39
njohnstonI agree; I thionk an operator is going to want some guidance on how to sensibly calculate what they should set this setting to but that is a question for the spec review14:39
yamamotoif it serves his purpose, i'm fine with it14:39
slaweqok, so I will mark this rfe as approved with using this max_routers parameter instead of bandwidth14:41
slaweqand we will discuss more details in spec review14:41
slaweqthat's all from me for today14:41
slaweqanything else You want to discuss today?14:42
yamamotonothing from me14:43
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slaweqok, so I will give You 15 minutes back14:45
slaweqhave a great weekend o/14:45
slaweqsee You on Monday14:45
slaweq#endmeeting14:45
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"14:45
openstackMeeting ended Fri Jun 26 14:45:24 2020 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)14:45
openstackMinutes:        http://eavesdrop.openstack.org/meetings/neutron_drivers/2020/neutron_drivers.2020-06-26-14.00.html14:45
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/neutron_drivers/2020/neutron_drivers.2020-06-26-14.00.txt14:45
openstackLog:            http://eavesdrop.openstack.org/meetings/neutron_drivers/2020/neutron_drivers.2020-06-26-14.00.log.html14:45
ralonsohbye14:45
yamamotogood night14:45
haleybo/14:45
slaweqgood night yamamoto :)14:45
lajoskatonaBye14:46
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mlavalleo/14:46
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