neutron

How quantum server know which host the VM Is deployed

Asked by alan lv

Hi, guys

I have a question about Quantum (I using Quantum Grizzly with OVS plugin), when deploying a vm , the nova_compute may send a 'port_update' msg to quantum server, then quantum_server will forward the msg to the quantum agent, but how quantum_server knows to which quantum_agent should send (how quantum_server knows the relationship between the nova_compute node and OVS agent), by hostname ? thanks

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lee jian
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Best lee jian (leejian0612) said : 		#1

in my comprehension,quantum_server will fanout the 'port_update' message, and every agent can receive the 'port_update' message,then according port's id included in the message to determine whether the port is local or not,if local,update the port,or do nothing.
you may look up the port_update function in ovs_quantum_agent.py for details.

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alan lv (lvec-lv) said : 		#2

thanks you for your replying

I have read the code before, but I'm not sure that is whether is exact right ^&^

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Aaron Rosen (arosen) said : 		#3

Lee jian is correct. That is how it works.

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alan lv (lvec-lv) said : 		#4

thanks Lee jian and Aaron Rosen !

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alan lv (lvec-lv) said : 		#5

Thanks lee jian, that solved my question.