Wednesday, 2021-05-19

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oneswig#startmeeting scientific-sig11:00
openstackMeeting started Wed May 19 11:00:21 2021 UTC and is due to finish in 60 minutes.  The chair is oneswig. Information about MeetBot at http://wiki.debian.org/MeetBot.11:00
openstackUseful Commands: #action #agreed #help #info #idea #link #topic #startvote.11:00
*** openstack changes topic to " (Meeting topic: scientific-sig)"11:00
openstackThe meeting name has been set to 'scientific_sig'11:00
oneswigGreetings11:00
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oneswig#endmeeting11:15
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"11:15
openstackMeeting ended Wed May 19 11:15:19 2021 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)11:15
openstackMinutes:        http://eavesdrop.openstack.org/meetings/scientific_sig/2021/scientific_sig.2021-05-19-11.00.html11:15
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/scientific_sig/2021/scientific_sig.2021-05-19-11.00.txt11:15
openstackLog:            http://eavesdrop.openstack.org/meetings/scientific_sig/2021/scientific_sig.2021-05-19-11.00.log.html11:15
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liuyulong#startmeeting neutron_l314:00
openstackMeeting started Wed May 19 14:00:55 2021 UTC and is due to finish in 60 minutes.  The chair is liuyulong. 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_l3)"14:00
openstackThe meeting name has been set to 'neutron_l3'14:00
liuyulongHi there14:01
liuyulongLong time no see.14:01
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lajoskatonaHi14:04
liuyulonghi there14:04
liuyulong#topic Bugs14:04
*** openstack changes topic to "Bugs (Meeting topic: neutron_l3)"14:04
liuyulong#link https://bugs.launchpad.net/neutron/+bug/192292314:05
openstackLaunchpad bug 1922923 in neutron "OVS port issue" [Medium,New]14:05
liuyulongI just change the bug title to "[L3] arp issue in router namespace in compute node"14:06
liuyulongaccording to the logs by the bug reportor.14:06
lajoskatona+114:07
liuyulongThere is MAC inconsistent between the action of arp entry delation: " (10.10.13.195) at fa:16:3e:c5:b9:23 [ether] PERM on qr-4affa6db-67" and "(10.10.13.195) at fa:16:3e:a4:76:8c [ether] on qr-4affa6db-67"14:07
liuyulongI have no idea about this, never meet such issue...14:09
slaweqhi14:09
slaweqsorry for being late14:09
slaweqI have another meeting in same time14:09
liuyulongSo, I just request the reportor to add more actions from the begining of the issue, such as booting VM, creating router and so on.14:10
liuyulongslaweq, hi14:10
liuyulongOK, next one14:10
liuyulong#link https://bugs.launchpad.net/neutron/+bug/192549814:10
openstackLaunchpad bug 1925498 in neutron "SNAT is not working" [High,New]14:10
liuyulongThis is a centralized router of Linux Bridge driver.14:11
liuyulongI just have one question, is the "enable_snat" set to True?14:11
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slaweqthat's good question indeed :)14:12
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liuyulongBut we can see there is a SNAT rule, don't know if there is something missing because of this enable_snat. "-A neutron-l3-agent-snat -o qg-33922118-c1 -j SNAT --to-source X.X.X.X --random-fully"14:13
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liuyulongLB driver is new to me honestly. :)14:13
liuyulongNext one14:14
liuyulong#link https://bugs.launchpad.net/neutron/+bug/192536814:14
openstackLaunchpad bug 1925368 in neutron "[L3] Router GW can be removed with routes defined" [Low,In progress] - Assigned to Rodolfo Alonso (rodolfo-alonso-hernandez)14:14
liuyulongIt has a patch here: https://review.opendev.org/c/openstack/neutron/+/78992914:15
liuyulongI just left a comment on the patch for the statement of "in other words, all14:17
liuyulongroute nexthops IP addresses should belong to one gateway subnet CIDR.".14:17
liuyulongThis should be an optional condition.14:18
liuyulongWe can still add route like this "to 8.8.8.8 via 1.1.1.1", none of these IPs is belong to Neutron router gateway or router subnets.14:18
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lajoskatonaWe discussed this yesterday's team meeting: http://eavesdrop.openstack.org/irclogs/%23openstack-meeting-3/%23openstack-meeting-3.2021-05-18.log.html#t2021-05-18T14:33:0514:19
lajoskatonaperhaps the discussion there can be useful14:20
liuyulongYes, so the commit message should be updated as well.14:21
liuyulongOK, next one14:22
liuyulong#link https://bugs.launchpad.net/neutron/+bug/192653114:22
openstackLaunchpad bug 1926531 in neutron "SNAT namespace prematurely created then deleted on hosts, resulting in removal of RFP/FPR link to FIP namespace" [Undecided,New]14:22
liuyulongI know this issue14:23
liuyulongThe main backgound of this bug is because the "dvr_snat" node is aslo the compute node.14:23
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liuyulongIf a router scheduled to this dvr_snat mode host, and there are floating IPs of VMs also running in this node.14:24
liuyulongThe router delete  action, the CLI can be "openstack network agent remove router <agent_id> <router_id>", will cause the L3 agent do a "process_delete" procedure.14:26
liuyulongThe bad effect is the call trace of the deletion will finally hit this line:14:27
liuyulonghttps://github.com/openstack/neutron/blob/master/neutron/agent/l3/dvr_local_router.py#L60814:27
liuyulongIt is in "external_gateway_removed".14:28
liuyulongSo all floating IPs of this router will not work in this node anymore.14:28
liuyulongBecause we delete the critical devices between qrouter-namespace and fip-namespace.14:29
liuyulongAs I said before, I'm not a fan for running DVR fuctions with mixed compute and dvr_snat.14:31
haleybme either14:31
liuyulongThis will drag a really long bug history...14:32
lajoskatonaCan't we document it? I mean like don't do this.... or.....14:33
liuyulong#link https://review.opendev.org/c/openstack/neutron/+/666991/13/releasenotes/notes/accepted_egress_direct-cc23873e213c6919.yaml14:33
liuyulongI think some clue about this can be found here.14:33
liuyulongBut anyway, I will take over this bug, it should be simple to fix.14:33
liuyulonglajoskatona, I will add some note in the fix.14:37
liuyulongIt should be needed.14:37
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liuyulongThe story should be very long...14:37
liuyulongOK, next one14:38
liuyulong#link https://bugs.launchpad.net/neutron/+bug/191642814:38
openstackLaunchpad bug 1916428 in neutron "dibbler tool for dhcpv6 is concluded" [Wishlist,Confirmed]14:38
liuyulongSeems that we still have no solution about this.14:38
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liuyulongThe maintainer of the dibbler suggests the project "Kea".14:39
liuyulongHas anyone tried?14:40
lajoskatonano14:40
haleybi have not14:40
liuyulong#link https://gitlab.isc.org/isc-projects/kea/-/commits/master14:41
liuyulongIt looks a really active project.14:41
liuyulongI did not find the licence of this new project.14:43
lajoskatonayes and not a onemanproject seemingly14:44
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liuyulonghaleyb, dibbler is used to notify the physical routers the IPv6 prefix. right?14:46
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haleybliuyulong: it's used to get the prefix from the physical routers14:47
lajoskatonaFrom https://www.isc.org/kea/ : "Kea is open source, shared under MPL2.0 licensing."14:47
haleybthe result is when they hand-out the prefix the router is learned14:47
haleybwhat is MPL2.0?14:48
lajoskatonano idea :-)14:48
liuyulongOK, I'm not fimilar with dibbler procedure, because we did not use it in production envrionment.14:48
lajoskatonaneed a lawyer....14:48
liuyulong#link https://www.mozilla.org/en-US/MPL/2.0/14:48
liuyulongIf the dibbler procedure is simple, maybe we can directly implement by ovs-agent (a local controller) and flows like distributed DHCP now. :)14:52
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haleybOVN actually added support for PD, but it's not configured in neutron, but i thought it also used dibbler14:53
haleybor maybe not, it's been a while14:53
haleybit is listed in the "gaps" document14:54
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liuyulongAlright, if there is a chance we can say goodbye to an external process, I will raise both hands in favor. :)14:56
liuyulongOK, no more bugs.14:57
liuyulong#topic On demand agenda14:57
*** openstack changes topic to "On demand agenda (Meeting topic: neutron_l3)"14:57
lajoskatonaThere's a thread regarding BGP, BFD and BGPVPN:14:59
lajoskatonahttp://lists.openstack.org/pipermail/openstack-discuss/2021-May/022446.html14:59
liuyulongGot it, a really long story. :)15:00
liuyulongOK, I think we should end here.15:00
liuyulongThank you guys.15:00
liuyulong#endmeeting15:00
*** openstack changes topic to "OpenStack Meetings || https://wiki.openstack.org/wiki/Meetings/"15:00
openstackMeeting ended Wed May 19 15:00:30 2021 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)15:00
lajoskatonaBye15:00
liuyulongbye15:00
openstackMinutes:        http://eavesdrop.openstack.org/meetings/neutron_l3/2021/neutron_l3.2021-05-19-14.00.html15:00
openstackMinutes (text): http://eavesdrop.openstack.org/meetings/neutron_l3/2021/neutron_l3.2021-05-19-14.00.txt15:00
openstackLog:            http://eavesdrop.openstack.org/meetings/neutron_l3/2021/neutron_l3.2021-05-19-14.00.log.html15:00
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