Allow chart to expose extra ports for default backend

Signed-off-by: Ricardo Lopes <ricardoapl.dev@gmail.com>

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

@@ -93,6 +93,13 @@ spec:
             - name: http
               containerPort: {{ .Values.defaultBackend.port }}
               protocol: TCP
+          {{- if .Values.defaultBackend.service.extraPorts }}
+            {{- range .Values.defaultBackend.service.extraPorts }}
+            - name: {{ .name }}
+              containerPort: {{ .targetPort }}
+              protocol: {{ .protocol }}
+            {{- end }}
+          {{- end }}
         {{- if .Values.defaultBackend.extraVolumeMounts }}
           volumeMounts: {{- toYaml .Values.defaultBackend.extraVolumeMounts | nindent 12 }}
         {{- end }}

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

@@ -38,6 +38,9 @@ spec:
     {{- if semverCompare ">=1.20.0-0" .Capabilities.KubeVersion.Version }}
       appProtocol: http
     {{- end }}
+  {{- if .Values.defaultBackend.service.extraPorts }}
+    {{ toYaml .Values.defaultBackend.service.extraPorts | nindent 4 }}
+  {{- end}}
   selector:
     {{- include "ingress-nginx.selectorLabels" . | nindent 4 }}
     app.kubernetes.io/component: default-backend

charts/ingress-nginx/values.yaml

@@ -1176,6 +1176,13 @@ defaultBackend:
     loadBalancerSourceRanges: []
     servicePort: 80
     type: ClusterIP
+
+    # -- Additional ports to expose for defaultBackend pods
+    extraPorts: []
+    #  - name: metrics
+    #    port: 9090
+    #    protocol: HTTP
+    #    targetPort: 9090
   priorityClassName: ""
   # -- Labels to be added to the default backend resources
   labels: {}