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Hi,

in this change kolla-ansible removed setting the HA policies per default (along with why).
TL;DR: The option `amqp_durable_queues` was not enabled on all openstack services, therefor HA queues do not make any sense (and actually actively make things worse).

--
Felix Huettner

From: Satish Patel <satish.txt at gmail.com>
Sent: Friday, February 10, 2023 5:47 PM
To: ozzzo at yahoo.com
Cc: OpenStack Discuss <openstack-discuss at lists.openstack.org>
Subject: Re: [kolla]RabbitMQ HA policies define

Hi,

I went through that doc because it always shows up first in google search :)

My question was why the kolla default doesn't come with HA policies?  I can surely add policy by myself and adjust requirements. I have also noticed without HA if any node fails then cause strange behavior in the entire cluster because of missing queues/data etc.

Personally I hate HA because the majority of messages are stateless. In my experience HA is a little stable when it comes down to node failure but with performance big no.


On Fri, Feb 10, 2023 at 11:15 AM Albert Braden <ozzzo at yahoo.com<mailto:ozzzo at yahoo.com>> wrote:
This has been discussed at great length; here are a couple of links that lead to interesting threads:

https://lists.openstack.org/pipermail/openstack-discuss/2021-November/026074.html<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.openstack.org%2Fpipermail%2Fopenstack-discuss%2F2021-November%2F026074.html&data=05%7C01%7C%7C60f6a1fa3ee74910b82808db0b875351%7Cd04f47175a6e4b98b3f96918e0385f4c%7C0%7C0%7C638116448067688419%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2F2ewiZjNMTiVbO13shuiQBGgvHNWSAxw6cNCZ8GN2zo%3D&reserved=0>
https://lists.openstack.org/pipermail/openstack-discuss/2020-August/016362.html<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.openstack.org%2Fpipermail%2Fopenstack-discuss%2F2020-August%2F016362.html&data=05%7C01%7C%7C60f6a1fa3ee74910b82808db0b875351%7Cd04f47175a6e4b98b3f96918e0385f4c%7C0%7C0%7C638116448067688419%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Nivuk0mlqy%2F%2By8de3%2FiadRhB10XhSCgOeGszwdjRx0Q%3D&reserved=0>

There used to be a useful document here:
https://wiki.openstack.org/wiki/Large_Scale_Configuration_Rabbit<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.openstack.org%2Fwiki%2FLarge_Scale_Configuration_Rabbit&data=05%7C01%7C%7C60f6a1fa3ee74910b82808db0b875351%7Cd04f47175a6e4b98b3f96918e0385f4c%7C0%7C0%7C638116448067688419%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=U9w8zVCx1C%2BJxBIB5iP8nTxoI4FDHnv76ezQmOgYubw%3D&reserved=0>

That link now points to the "Large Scale SIG" home page. Does anyone know where the useful RMQ document is? I assume that it is buried somewhere under "Large Scale Journey."

The bottom line is that, by default, kolla-ansible enables replication but not durable-queues, which is an unstable configuration. I believe that this may have been fixed in a newer version; we are on Train.

https://lists.openstack.org/pipermail/openstack-discuss/2020-August/016524.html<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.openstack.org%2Fpipermail%2Fopenstack-discuss%2F2020-August%2F016524.html&data=05%7C01%7C%7C60f6a1fa3ee74910b82808db0b875351%7Cd04f47175a6e4b98b3f96918e0385f4c%7C0%7C0%7C638116448067688419%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=q%2FVgkhGeq0q59W9h5%2BCqKCt7lbgMh1RdIMbxE%2F0LBW4%3D&reserved=0>
On Thursday, February 9, 2023, 10:48:11 PM EST, Satish Patel <satish.txt at gmail.com<mailto:satish.txt at gmail.com>> wrote:


Folks,

I have deployed 3 node kolla controllers and notice rabbitMQ doesn't have any HA policy for queues. when i rebooted one of the nodes and found some messages got lost.

Any reason kolla doesn't use HA policies by default?

If i want to add policies then where should i specify them or any doc you can point me to define policies.

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