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Hi Paul,

tbh I'm not exactly sure what you are trying to do overall. But from your script it seems to me that you are trying to create an OVS port so a libvirt instance outside of Nova control can use it. And you don't need the linux bridge for security group iptables.

AFAIK the tap must be created first using the ip command. Then when 'ovs-vsctl add-port' is called with the same name as the tap device for the port name, the tap device will be enslaved properly in the OVS bridge.

https://github.com/openstack/nova/blob/304df046eaaad6d64ee16898b1eaa76918e98878/nova/virt/libvirt/vif.py#L420-L423

Regards, Darragh.

On Monday, 31 March 2014, 12:36, Paul Michali (pcm) <pcm at cisco.com> wrote:
 
Hi Darragh, 
>
>
>Can you elaborate on what the “set interface” arguments do in OVS? Just trying to understand why it is not desired, when plugging into this interface (note I have a management interface on the br-int and it works fine…this one, which is also on br-int, but needs to tie to the existing “private” network that devstack sets up, does not work.
>
>
>Regards,
>
>
>PCM (Paul Michali)
>
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>On Mar 31, 2014, at 4:20 AM, Darragh O'Reilly <dara2002-openstack at yahoo.com> wrote:
>
>Hi Paul,
>>
>>the OVSInterfaceDriver creates interfaces with type internal so agents like DHCP/L3 etc can put IP addresses on them. But I don't think type internal will work for instances. You could try subclassing and overriding so it does not do this:
>>
>> https://github.com/openstack/neutron/blob/2541ff7cad19941b62dace7e9951a56a16e53f3e/neutron/agent/linux/interface.py#L150 
>>
>>
>>Regards,
>>Darragh.
>>
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