[Rdo-list] rdo-manager hostname issues with rabbitmq

[John Eckersberg]

Lars Kellogg-Stedman <lars at redhat.com> writes:
> On Thu, Apr 30, 2015 at 08:15:35AM -0400, James Slagle wrote:
>> For baremetal, I've added some notes to the docs to hopefully cover the
>> requirements.
>
> I'm not familiar with AMQP.  Is there a particular reason why rabbitmq
> is so sensitive to hostname issues?  I was surprised to run into this
> with a packstack install the other day, especially given that
> packstack configures everything uses ip addresses rather than names.
>
> rabbitmq seems to perform some sort of reverse-lookup of the hostname,
> and there was a stale dns entry out there that it was picking up.
> This wouldn't have caused a problem for anything else (because the
> entire configuration is based on ip addresses rather than hostnames),
> but it prevented rabbitmq from starting up correctly.
>
> Is there any chance that we should also be pursuing this as a bug in
> rabbitmq?  Or is there a configuration we can tweak in rabbitmq that
> will make it less sensitive to hostname issues?

It's not so much a RabbitMQ issue, moreso an issue with distributed
Erlang.  The platform itself gets confused while trying to cluster
itself.  None of those bits are RabbitMQ-proper.

eck