[neutron][nova] [kolla] vif plugged timeout

Tony Liu tonyliu0592 at hotmail.com
Wed Nov 24 00:21:27 UTC 2021

I hit the same problem, from time to time, not consistently. I am using OVN.
Typically, it takes no more than a few seconds for neutron to confirm the port is up.
The default timeout in my setup is 600s. Even the ports shows up in both OVN SB
and NB, nova-compute still didn't get confirmation from neutron. Either neutron
didn't pick it up or the message was lost and didn't get to nova-compute.
Hoping someone could share more thoughts.

From: Laurent Dumont <laurentfdumont at gmail.com>
Sent: November 22, 2021 02:05 PM
To: Michal Arbet
Cc: openstack-discuss
Subject: Re: [neutron][nova] [kolla] vif plugged timeout

How high did you have to raise it? If it does appear after X amount of time, then the VIF plug is not lost?

On Sat, Nov 20, 2021 at 7:23 AM Michal Arbet <michal.arbet at ultimum.io<mailto:michal.arbet at ultimum.io>> wrote:
+ if i raise vif_plugged_timeout ( hope i rember it correct ) in nova to some high number ..problem dissapear ... But it's only workaround

Dňa so 20. 11. 2021, 12:05 Michal Arbet <michal.arbet at ultimum.io<mailto:michal.arbet at ultimum.io>> napísal(a):

Has anyone seen issue which I am currently facing ?

When launching heat stack ( but it's same if I launch several of instances ) vif plugged in timeouts an I don't know why, sometimes it is OK ..sometimes is failing.

Sometimes neutron reports vif plugged in < 10 sec ( test env ) sometimes it's 100 and more seconds, it seems there is some race condition but I can't find out where the problem is. But on the end every instance is spawned ok (retry mechanism worked).

Another finding is that it has to do something with security group, if noop driver is used ..everything is working good.

Firewall security setup is openvswitch .

Test env is wallaby.

I will attach some logs when I will be near PC ..

Thank you,
Michal Arbet (Kevko)

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