Comment 8 for bug 1316621

@berrange

Thats excellent. I was going to propose a change to do just that now that I'm back from vacation. Since thats already done I can work on the other required pieces to make that work in nova.

Since this is currently hurting the gate the current plan is the following.

1) Submit a quick fix that adds a simple retry to nova for ebtables. This should get the gate working smoothly again.

2) Add support timing out long running commans to oslo.concurrency.processutils. ebtables --concurrent will block, forever until it gets the lock. We need a way to reliable time this out after some period of time to prevent nova blocking on this forever.

3) Once we can timeout an operation in processutils we can patch nova to use --concurrent.

I should have patch #1 up in the next day.