Switch to new way to specify cpu usage.

kubernetes/autoscale/k8s/autoscale.yaml

@@ -49,7 +49,7 @@ spec:
     - port: 80
       targetPort: "http"
 ---
-apiVersion: autoscaling/v1
+apiVersion: autoscaling/v2beta2
 kind: HorizontalPodAutoscaler
 metadata:
   name: autoscale-test
@@ -61,4 +61,10 @@ spec:
     name: autoscale-test
   minReplicas: 1
   maxReplicas: 10
-  targetCPUUtilizationPercentage: 50
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 50