[Openstack] OpenStack Quantum plugins
Salman Malik
salmanmk at live.com
Fri Apr 27 05:04:04 UTC 2012
Dan, Salavatore and others, your input is sought here. Can any one provide little explanation please?
From: salmanmk at live.com
To: openstack at lists.launchpad.net
Subject: OpenStack Quantum plugins
Date: Thu, 26 Apr 2012 19:55:20 +0000
Hi All,
I am trying to learn the functionality of Quantum plugins used in
OpenStack. I have read through the Quantum Admin Guide and had few
basic/quick question about quantum and OVS interaction with it:
1) OVS can have ports in which vNICS can be plugged, so why does it need
to use an integration bridge for connecting all VMs on the same node to
a network?
2) The OVS quantum plugin seems to implement the core API functions and
(viewing the code) I concluded that it just makes maintains the logical
mappings e.g. b/w net IDs and VLAN IDs in a database. So how is this
mapping implemented on the actual ports of OVS? Is it the OVS quantum
agent responsible for directing the packets to correct input/output
ports based on the updates that it gets from the database?
3) The quantum admin guide says that the nova client will be the main
user of quantum and will interact with it via REST API, so it would be nice if someone can point me to the code (file path name etc.) where this happens.
Thanks,
Salman
PS: What is the purpose of Quantum Manager in this architecture and where should I look for its code?
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