add target group binding object for using existing aws lb

charts/ingress-nginx/templates/TargetGroupBinding.yaml

@@ -0,0 +1,16 @@
+{{- if and (eq .Values.controller.service.type "NodePort") (.Values.controller.service.awsTargetGroupBinding.enabled) }}
+{{- range $key, $value := .Values.controller.service.awsTargetGroupBinding.arnMapping }}
+---
+apiVersion: elbv2.k8s.aws/v1beta1
+kind: TargetGroupBinding
+metadata:
+  name: {{ include "ingress-nginx.controller.fullname" $ }}-{{ $key }}
+  namespace: {{ include "ingress-nginx.namespace" $ }}
+spec:
+  serviceRef:
+    name: {{ include "ingress-nginx.controller.fullname" $ }}
+    port: {{ index $.Values.controller.service.targetPorts $key }}
+  targetType: instance
+  targetGroupARN: {{ $value }}
+{{- end }}
+{{- end }}

charts/ingress-nginx/values.yaml

@@ -545,6 +545,12 @@ controller:
       # udp:
       #   53: 30053
       udp: {}
+    # -- If want to use an existing AWS LoadBalancer, write the arn of the Target Group.
+    awsTargetGroupBinding:
+      enabled: false
+      arnMapping:
+        http: ""
+        https: ""
     internal:
       # -- Enable the internal controller service or not. Remember to configure `controller.service.internal.annotations` when enabling this.
       enabled: false