Hello,

In a edge setup/environnement (DCN) we might need to make openstack advanced Scheduling and Pod Affinity and Anti-affinity with cinder-volume, let me explain the use case.

In a DCN setup, I have a cinder-volume for each AZ (AZ1/AZ2/AZ3).

I can make a node selector to put cinder-volume on workers from each AZ to be optimal.

In the case I loose all openshift workers from AZ-X, I want my cinder-volume to be scheduled on other workers from an other AZ, with a single node selector this is not possible.

That's why we need to be able to do affinity in order to use requiredDuringSchedulingIgnoredDuringExecution and preferredDuringSchedulingIgnoredDuringExecution.

Regards, Kevin