Actually looking at the comments in those patches I'm a little worried.
The WARNs I see in the logs are for updates to the MAC for an underlay VIP.
So if the VIP has moved and OVN tries to update the MAC_Binding with the
new MAC are these warnings suggesting that the update is ignored because we
already have a binding entry for that logical port/IP? If so isn't that
a bug?
Or we we relying on that MAC being eventually aged out?
On 18/10/2021 12:54, Daniel Alvarez Sanchez wrote:
On Mon, Oct 18, 2021 at 1:12 PM Ammad Syed <[email protected]> wrote:
Hi Brendan,
Not sure but this could be related to the patch below in neutron
that was recently released.
https://opendev.org/openstack/neutron/commit/f6c35527698119ee6f73a6a3613c9beebb563840
<https://urldefense.com/v3/__https://opendev.org/openstack/neutron/commit/f6c35527698119ee6f73a6a3613c9beebb563840__;!!ACWV5N9M2RV99hQ!cn97GSHkLNk2IAP88xCMhUL0NQRFKZzL0KAGHtHhBr9I2o-4rM-4MhSF4y_Mm48vab0$>
Not really, as this commit that you refer to is to reduce the memory
footprint in the neutron-server process itself. Neutron never inserts
anything into the MAC_Binding table.
However, we landed another patch [0] that will likely minimize this
issue as it will reduce the MAC_Binding insertions, limiting them only
to MAC addresses that need to be reached out by the overlay.
Thanks!
daniel
[0] https://review.opendev.org/c/openstack/neutron/+/813610
<https://urldefense.com/v3/__https://review.opendev.org/c/openstack/neutron/*/813610__;Kw!!ACWV5N9M2RV99hQ!cn97GSHkLNk2IAP88xCMhUL0NQRFKZzL0KAGHtHhBr9I2o-4rM-4MhSF4y_MrPfrn6U$>
Ammad
On Mon, Oct 18, 2021 at 3:40 PM Brendan Doyle
<[email protected]> wrote:
I too am seeing many entries in the ovn-controller log like these:
ovn/ovn-controller.log:2021-10-18T09:50:46.984Z|00164|ovsdb_idl|WARN|transaction
error: {"details":"Transaction causes multiple rows in
\"MAC_Binding\" table to have identical values
(lr_vcn6727324-ls_vcn6727324_external_ugw and
\"253.255.80.18\") for index on columns \"logical_port\" and
\"ip\". First row, with UUID
614509d1-5dfc-4268-94b7-6190c1bd8c58, was inserted by this
transaction. Second row, with UUID
5b56044f-7e62-4e6b-b559-2bca31ad5ab0, existed in the database
before this transaction and was not modified by the
transaction.","error":"constraint violation"}
So with my limited understanding of the MAC_Binding table I'm
wondering are these benign?
I think it's benign
In that is it that we for what ever reason have decided that
we need to do an ARP to discover
a MAC, then ovn-controller tries to add the discovered MAC to
the MAC_Binding only to find
that it is already there. In which case the question is why
was an ARP request sent when
we already had a MAC binding.
For me these are only ever seen on Distributed router Port
Gateways.
On 12/10/2021 13:06, Ammad Syed wrote:
Hi,
I am using openstack with ml2/ovn. I have two gateway chassis
whenever I shutdown one chassis and bring it back online, I
see below error in ovn-controller logs.
Can you please advise the way to fix it ?
2021-10-12T11:49:22.124Z|00511|binding|INFO|cr-lrp-4c882760-15b1-4cf4-b680-53e88880e928:
Claiming fa:16:3e:55:12:5a 101.53.244.97/24
<https://urldefense.com/v3/__http://101.53.244.97/24__;!!ACWV5N9M2RV99hQ!eo4L8XZbywCy0zb_p7-7LEVv9xl6g9V8JEf6oZTAO21scCtNAudRSGcK9mYnwIip1bQ$>
2021-10-12T11:49:22.126Z|00512|binding|INFO|Releasing lport
cr-lrp-4c882760-15b1-4cf4-b680-53e88880e928 from this chassis.
2021-10-12T11:50:32.032Z|00513|ovsdb_idl|WARN|transaction
error: {"details":"Transaction causes multiple rows in
\"MAC_Binding\" table to have identical values
(lrp-4c882760-15b1-4cf4-b680-53e88880e928 and
\"fe80::6a4f:64ff:fef7:8c0\") for index on columns
\"logical_port\" and \"ip\". First row, with UUID
cbc847e6-75e4-4d73-9906-4fef221cad38, was inserted by this
transaction. Second row, with UUID
bcac2e3e-5f32-411a-afcf-3249b85700f4, existed in the database
before this transaction and was not modified by the
transaction.","error":"constraint violation"}
Ammad
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--
Regards,
Syed Ammad Ali
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