On 09/11/2014 01:50 PM, James Dempsey wrote:
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.
We had client-side issues on failovers as well. Keepalives seemed to
help, but we also ported the following patch to all the applicable
clients (since they're not using oslo.messaging yet).
https://github.com/openstack/oslo.messaging/commit/0400cbf4f83cf8d58076c7e65e08a156ec3508a8
Chris
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