[Openstack] Messaging reliability/durability expectations

Raghu Vadapalli rvatspacket at gmail.com
Tue Oct 14 14:12:08 UTC 2014


On Tuesday, Oct 14, 2014 at 7:49 AM, Aaron Knister <aaron.knister at gmail.com>, wrote:

Thanks Remo, could you elaborate a little? Which is part of RabbitMQ? The HA layer or the message retransmission? I'm currently using qpid. Also, just so I'm clear, is it the openstack code or the low-level messaging drivers (rabbit, zmq, qpid) that retransmit on message delivery failure?


​That should be the job messaging infrastructure provided by rabbit or qpid 


Sent from my iPhone

On Oct 13, 2014, at 11:59 PM, Remo Mattei <remo at italy1.com> wrote:

That is part of RabbitMQ and yes it will resend the msg. 


On Oct 13, 2014, at 22:31, Aaron Knister <aaron.knister at gmail.com> wrote:

Hi Everyone,

I'm building a production-grade cloud where HA is a requirement. I'm currently working on implementing HA of the messaging layer and am not clear on what the expectations/assumptions are of the messaging layer regarding message durability and reliability. I've seen documentation scattered about that suggests OpenStack makes no assumptions that messages will be delivered or will need to persist for any period of time (https://openstack.redhat.com/Highly_Available_Qpid_for_OpenStack).

What's the consequence of RPC message loss within openstack? Is it true that it will resend messages?




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