What now?

Please note that we used autoscaling/v2beta1 version of HorizontalPodAutoscaler. At the time of this writing (November 2018), only v1 is stable and production-ready. However, v1 is so limited (it can use only CPU metrics) that it's almost useless. Kubernetes community worked on new (v2) HPA for a while and, in my experience, it works reasonably well. The main problem is not stability but potential changes in the API that might not be backward compatible. A short while ago, autoscaling/v2beta2 was released, and it uses a different API. I did not include it in the book because (at the time of this writing) most Kubernetes clusters do not yet support it. If you're running Kubernetes 1.11+, you might want to switch to v2beta2. If you do so, remember that you'll need to make a few changes to the HPA definitions we explored. The logic is still the same, and...