Kubernetes 1.23: What’s New

K8s 1.23 is the last release before Dockershim removal. Key changes:

FlexVolume Deprecation

CSI (Container Storage Interface) is now the only supported way to add storage drivers. If you have custom FlexVolume plugins, migrate immediately.

HorizontalPodAutoscaler v2 Stable

HPA v2 allows scaling on custom metrics (e.g., queue depth from Prometheus). This is now GA.

metrics:
- type: External
  external:
    metric:
      name: queue_messages_ready
    target:
      type: AverageValue
      averageValue: 10