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I am glad that it works for you now :)

Michal

Michal Arbet
Openstack Engineer

Ultimum Technologies a.s.
Na Poříčí 1047/26, 11000 Praha 1
Czech Republic

+420 604 228 897
michal.arbet at ultimum.io
*https://ultimum.io <https://ultimum.io/>*

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po 29. 11. 2021 v 10:35 odesílatel Kamil Madáč <kamil.madac at slovenskoit.sk>
napsal:

> Ahoj Michal,
>
> Thanks for responding and suggestion. During the weekend I upgraded
> neutron l3 agent to most recent victoria version of kolla container
> (17.2.2.dev56) and it seems it helped -> No disappearing routes in fip
> namespace anymore after restart 🙂
>
> I found change set which fixes race condition in l3 agent
> https://review.opendev.org/c/openstack/neutron/+/803576 from September
> this year and I think that could be the one which fixes it.
>
> ------------------------------
> *From:* Michal Arbet <michal.arbet at ultimum.io>
> *Sent:* Monday, November 29, 2021 10:20 AM
> *To:* Kamil Madáč <kamil.madac at slovenskoit.sk>
> *Cc:* openstack-discuss <openstack-discuss at lists.openstack.org>
> *Subject:* Re: [neutron]Some floating IPs inaccessible after restart of
> L3 agent
>
> Ahoj Kamil,
>
> I've just read email on phone quickly, and I remember that I've fixed
> something similar in Debian Victoria packages. Maybe it's your issue, but
> can't check right now.
>
> Could you check it ? It's fixed in newer versions of neutron.
>
> https://bugs.launchpad.net/ubuntu/+source/neutron/+bug/1927868
>
> Thanks,
> Michal Arbet (kevko)
>
> Dňa pi 26. 11. 2021, 10:53 Kamil Madáč <kamil.madac at slovenskoit.sk>
> napísal(a):
>
> Hello Everyone,
>
> We have openstack Victoria deployed since the beginning of the year with
> kolla/ansible in docker containers. Everything was running OK, but few
> weeks ago we noticed issues with networking. Our installation uses
> Openvswitch networking with DVR non HA routers.
>
> Everything is running smoothly until we restart L3 agent. After that, some
> floating ips of VMs running on the node where L3 agent is running becomes
> inaccessible. Workaround is to reassign floating IP to affected VM. Every
> restart affects same floating IPs and VMs.
>
> No errors/excpetions found in logs.
>
> I was able to find out that after restart there are missing routes for
> those particular floating IPs in fip- namespace, which causes that proxy
> arp responses are not working. After floating IP address is reassigned,
> routes are added by L3 agent and floating IP is working again.
>
> Looks like some sort of race condition in L3 agent, but I was not able to
> identify any possible existing bug.
>
> L3 agent is in version 17.0.1.dev44.
>
> Is anyone aware of any existing bug which could explain such behavior, or
> does anyone have idea how to solve the issue?
>
> Kamil Madáč
> *Slovensko IT a.s.*
>
>
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