upgrade hpa api for default backend

charts/ingress-nginx/README.md

@@ -456,6 +456,7 @@ Kubernetes: `>=1.20.0-0`
 | controller.updateStrategy | object | `{}` | The update strategy to apply to the Deployment or DaemonSet # |
 | controller.watchIngressWithoutClass | bool | `false` | Process Ingress objects without ingressClass annotation/ingressClassName field Overrides value for --watch-ingress-without-class flag of the controller binary Defaults to false |
 | defaultBackend.affinity | object | `{}` |  |
+| defaultBackend.autoscaling.apiVersion | string | `"autoscaling/v2"` |  |
 | defaultBackend.autoscaling.annotations | object | `{}` |  |
 | defaultBackend.autoscaling.enabled | bool | `false` |  |
 | defaultBackend.autoscaling.maxReplicas | int | `2` |  |

charts/ingress-nginx/templates/default-backend-hpa.yaml

@@ -1,5 +1,5 @@
 {{- if and .Values.defaultBackend.enabled .Values.defaultBackend.autoscaling.enabled }}
-apiVersion: autoscaling/v2beta1
+apiVersion: {{ .Values.controller.autoscaling.apiVersion }}
 kind: HorizontalPodAutoscaler
 metadata:
   labels:

charts/ingress-nginx/values.yaml

@@ -923,6 +923,7 @@ defaultBackend:
   #    emptyDir: {}
 
   autoscaling:
+    apiVersion: autoscaling/v2
     annotations: {}
     enabled: false
     minReplicas: 1