assigning IP address to a VM interface

Asked by Prashanth Prahalad on 2013-04-10

Hi Folks,

Probably a deep-dive question into quantum internals - I'm trying to understand how the IP address'es are assigned to VM network interfaces and trying to figure out which part of the openstack/quantum code base handles this. This is my understanding :

* During nova boot, nova provides the network-id to the quantum plugin and creates a new port (CreatePort API)
* Configured quantum plugin creates the ports and assigns the IP address/MAC address.
* This port information is then configured in the XML config files as required by the hypervisor, before the instance boots up.

Is this a correct ?

Thanks !

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yong sheng gong (gongysh) said : #1, click the 'Slides on Technical Architecture of Quantum'
slide 28: step 2 creates the quantum port and allocates the IP, step 5 creates the ovs port by vif driver in nova. step 9 gets the IP in VM.


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