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Subbu,
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<div>we are running on RMQ 3.2 with server-side HA policy on all OpenStack queues.</div>
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<div>Even with two Rabbit servers dispersed over two sufficiently distant data centers (different subnets, different locations, connected via fibre over a number of routers), and besides network partitions here and there (which RMQ fixes automatically most
of the time, if configured properly), our setup runs like a charm. Hardware is negligible; RMQ almost never goes beyond a GB or so of memory usage, and the CPU is usually bored to death.</div>
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<div>We found the DRBD setup much more flaky and rather cumbersome to setup, and frankly, I never understood why people happen to take the dark alley Linux-HA. If you want, you can put ldirectord in front of the two boxes to balance the load (we did that, although
from a performance perspective, this is not necessary). ldirectord also detects whether one of the boxes is out to lunch (which never happened so far), and reroutes the traffic automatically.</div>
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<div>To be really sure, put a corosync/pacemaker-managed failover (virtual) IP in front of the two boxes, and run corosync/pacemaker/ldirectord/rabbitmq on each box, with properly configured VIP transportation – that’s where I’d invest the effort to dive into
the details of Linux HA glory.</div>
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<div>Regards,</div>
<div>Alexander<br>
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<div>Am 20.01.2014 um 05:33 schrieb Allamaraju, Subbu <<a href="mailto:subbu@subbu.org">subbu@subbu.org</a>>:</div>
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<blockquote type="cite">OpenStack HA guide (<a href="http://docs.openstack.org/high-availability-guide/content/s-rabbitmq.html">http://docs.openstack.org/high-availability-guide/content/s-rabbitmq.html</a>) says that Pacemaker/DRBD approach is preferred over
active-active mirrored queues. Details are sparse in the guide. Is anyone aware of any data/issues first hand?<br>
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Thanks for any pointers.<br>
<br>
Subbu<br>
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