feat: support custom labels for internal service

This change allows configuring labels specifically for the internal
service without affecting the main controller service, useful for
external-dns configuration.

Author: samuelarogbonlo

charts/ingress-nginx/ci/controller-service-internal-values.yaml

@@ -11,3 +11,6 @@ controller:
       enabled: true
       annotations:
         service.beta.kubernetes.io/aws-load-balancer-internal: "true"
+      labels:
+        external-dns.alpha.kubernetes.io/hostname: internal.example.com
+        

charts/ingress-nginx/templates/controller-service-internal.yaml

@@ -1,4 +1,4 @@
-{{- if and .Values.controller.service.enabled .Values.controller.service.internal.enabled .Values.controller.service.internal.annotations -}}
+{{- if and .Values.controller.service.enabled .Values.controller.service.internal.enabled -}}
 apiVersion: v1
 kind: Service
 metadata:
@@ -9,8 +9,8 @@ metadata:
   labels:
     {{- include "ingress-nginx.labels" . | nindent 4 }}
     app.kubernetes.io/component: controller
-  {{- if .Values.controller.service.labels }}
-    {{- toYaml .Values.controller.service.labels | nindent 4 }}
+  {{- if .Values.controller.service.internal.labels }}
+    {{- toYaml .Values.controller.service.internal.labels | nindent 4 }}
   {{- end }}
   name: {{ include "ingress-nginx.controller.fullname" . }}-internal
   namespace: {{ include "ingress-nginx.namespace" . }}

charts/ingress-nginx/values.yaml

@@ -25,6 +25,14 @@ controller:
   image:
     ## Keep false as default for now!
     chroot: false
+  service:
+    internal:
+      # Enable the internal service for ingress traffic
+      enabled: false
+      # -- Annotations to be added to internal service
+      annotations: {}
+      # -- Additional custom labels for internal service specifically, useful for external-dns configuration
+      labels: {}
     # registry: registry.k8s.io
     image: ingress-nginx/controller
     ## for backwards compatibility consider setting the full image url via the repository value below