Got a answer from Ken on Linkedin,
Hi Hermesh - I think you are referring to my diagram from the OpenStack Summit. That diagram is probably a little inaccurate -- it shows the most common deployment architecture than a true logical architecture.
As far as I know, Cinder doesn't need to communicate through AMQP with Nova.
I've updated my diagrams and explanation at OpenStack Grizzly Architecture Revisited
Thanks Ken and Romil!!!
Hi Hermesh,
As per my understanding Cinder is not using the same message queue used by nova, a separate queue is created for Cinder. You can use the given command to list the queues if you are using rabbitmq rabbitmqctl list_queues. You can refer the given link for more details:
messaging-in-openstack-using-rabbitmq
If i am not getting it wrong, so you mean to say OpenStack logical architecture http://docs.openstack.org/trunk/openstack-compute/admin/content/figures/1/figures/openstack-arch-grizzly-v1-logical.jpg needs some corrections?
The openstack logical architecture is correct. In tht diagram they represent queue as Queue-server ( it can be either Rabbitmq , Qpid etc) . A rabbitmq is a message broker which contains seperate exchanges and message queues for every component like ( nova, quantum , cinder ) .
for more details on exchanges and queues please refer : http://www.rabbitmq.com/tutorials/amqp-concepts.html
Asked: 2013-06-13 04:32:52 -0500
Seen: 534 times
Last updated: Jun 17 '13
