For the Kuryr project, in order to support blocking until vifs are plugged in (that is adding config options similar to the following options define in Nova: vif_plugging_is_fatal and vif_plugging_timeout), we need to detect that the Neutron plugin being used is done with plugging a given vif.
Here are a few options: 1- The simplest approach seems to be polling for the status of the Neutron port to become Active. (This may lead to scalability issues but short of having a specific goal for scalability, it is not clear that will be the case.) 2- Alternatively, We could subscribe to the message queue and wait for such a port update event. 3- It was also suggested that we could use l2 agent extension to detect such an event but that seems to limit us to certain Neutron plugins and therefore not acceptable. I was wondering if there are other and better options. Best, Mohammad
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