Open Stack

On 12/09/14 04:15, Chris Friesen wrote:
> Hi,
> 
> The OpenStack high availability guide seems to be a bit ambiguous about
> whether RabbitMQ should be configured active/standby or
> active/active...both methods are described.
> 
> Has anyone tried using active/active with mirrored queues as recommended
> by the RabbitMQ developers?  If so, what problems did you run into?
> 
> Thanks,
> Chris
> 
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Hi Chris,

We do Active/Active RabbitMQ with mirrored queues and Precise/Havana.
We faced a lot of failover problems where clients weren't figuring out
that their connections were dead.  The TCP keepalives mentioned in the
following bug seemed to help a lot.
https://bugs.launchpad.net/nova/+bug/856764  The moral of our story is
to make sure you are monitoring the sanity of your agents.

Cheers,
James

-- 
James Dempsey
Senior Cloud Engineer
Catalyst IT Limited
+64 4 803 2264
--