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Yes, thanks Mohammed. I got the same advice from Clint earlier, so
I'll prolly stick to RabbitMQ for now. I have my rabbittmq running on
my 3 controllers, setup with
http://docs.openstack.org/ha-guide/shared-messaging.html#configure-openstack-services-to-use-rabbit-ha-queues
please let me know if there are any additional parameters I should
consider that would make the base deployment more robust to failure,
network disruptions, single rabbitmq-server node down, etc. thanks
will

On Mon, Aug 15, 2016 at 11:13 PM, Mohammed Naser <mnaser at vexxhost.com> wrote:
> The history of the ZeroMQ driver has been quite weird, going through
> stages where it completely did not work at all, to receiving a few
> patches to make it work and it's risked being removed from the
> oslo.messaging package a few times.
>
> For a cluster at a smaller scale, I'd suggest sticking to RabbitMQ in
> order to avoid dealing with problems which you'll be stuck with.  I
> also don't think the CI at OpenStack does any testing for ZeroMQ.
>
> https://wiki.openstack.org/wiki/ZeroMQ
>
> On Mon, Aug 15, 2016 at 10:14 AM, William Josefsson
> <william.josefson at gmail.com> wrote:
>> thx Clint! okay I will stick to RabbitMQ for now. Do you know any good
>> up2date guide for replacing RabbitMQ with ZeroMQ, or is the general
>> documentation http://docs.openstack.org/developer/oslo.messaging/zmq_driver.html
>>  have you tried this?
>>
>> I'm also not sure if the ZeroMQ support is here to stay, or whether it
>> will be removed going forward. thx will
>>
>> On Mon, Aug 15, 2016 at 3:24 AM, Clint Byrum <clint at fewbar.com> wrote:
>>> Excerpts from William Josefsson's message of 2016-08-14 15:39:06 +0800:
>>>> Hi everyone,
>>>>
>>>> I see advice in replacing RabbitMQ with ZeroMQ. I've been running 2
>>>> clusters Liberty/CentOS7 with RabbitMQ now for while. The larger
>>>> cluster consists of 3x Controllers and 4x Compute nodes. RabbitMQ is
>>>> running is HA mode as per:
>>>> http://docs.openstack.org/ha-guide/shared-messaging.html#configure-rabbitmq-for-ha-queues.
>>>>
>>>
>>> For 7 real computers, RabbitMQ is actually a better choice. You get
>>> centralized management and the most battle-tested driver of all.
>>>
>>> ZeroMQ is meant to remove the bottleneck and SPOF of a RabbitMQ cluster
>>> from much larger systems by making the data path for messaging directly
>>> peer-to-peer, but it still needs a central matchmaker database. So at
>>> that scale, you're not really winning much by using it.
>>>
>>> I can't really speak to the answers for your problems that you've seen,
>>> but in general I'd expect Liberty and Mitaka on RabbitMQ to handle your
>>> cluster size without breaking a sweat. Have you reported the errors as
>>> bugs in oslo.messaging? That might be where to start:
>>>
>>> https://bugs.launchpad.net/oslo.messaging/+filebug
>>>
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>>
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>
>
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