kubernetes rollout triggered on scaling
Yeah, the term rollout is somewhat ambiguous and should be clarified, but it means that when you update the pod template, the existing pods are brought down and new pods are brought up, in accordance with the rollout ergonomics. When you just change the replica number, the existing pods are left in place and identical ones to the existing are spun up. So it's like adding to the previous rollout, not creating a new one.