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张晨 <zhangchen9211 at 126.com> wrote:

> Thx for the answer, i finally locate the implementation in  
> nova.network.linux_net.create_ovs_vif_port
>
> but how could nova execute the ovs-vsctl for the compute-node hypervisor  
> just in the control-node?
>

Nova still runs nova-compute service on your hypervisor to manage instances  
scheduled to the node. That service is the one that will prepare the VIF  
port.

Ihar