add custom metric to hpa template

charts/ingress-nginx/templates/controller-hpa.yaml

@@ -1,5 +1,5 @@
 {{- if and .Values.controller.autoscaling.enabled (or (eq .Values.controller.kind "Deployment") (eq .Values.controller.kind "Both")) -}}
-apiVersion: autoscaling/v2beta1
+apiVersion: autoscaling/v2beta2
 kind: HorizontalPodAutoscaler
 metadata:
   labels:
@@ -15,15 +15,22 @@ spec:
   maxReplicas: {{ .Values.controller.autoscaling.maxReplicas }}
   metrics:
   {{- with .Values.controller.autoscaling.targetCPUUtilizationPercentage }}
-    - type: Resource
-      resource:
-        name: cpu
-        targetAverageUtilization: {{ . }}
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: {{ . }}
   {{- end }}
   {{- with .Values.controller.autoscaling.targetMemoryUtilizationPercentage }}
-    - type: Resource
-      resource:
-        name: memory
-        targetAverageUtilization: {{ . }}
+  - type: Resource 
+    resource: 
+      name: memory 
+      target:
+        type: Utilization
+        averageUtilization: {{ . }}
+  {{- end }}
+  {{- with .Values.controller.autoscalingTemplate }}
+{{- toYaml . | nindent 2 }}
   {{- end }}
 {{- end }}