Add option to use a specific nodePort (#70)

* Add option to use a specific nodePort

* Update README on option to specify a nodePort

README.md

@@ -459,6 +459,7 @@ Chart configuration is as follows:
 | `service.port` | `587` | SMTP submission port |
 | `service.labels` | `{}` | Additional service labels |
 | `service.annotations` | `{}` | Additional service annotations |
+| `service.nodePort` | *empty* | Use a specific `nodePort` |
 | `resources` | `{}` | [Pod resources](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/) |
 | `autoscaling.enabled` | `false` | Set to `true` to enable [Horisontal Pod Autoscaler](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/) |
 | `autoscaling.minReplicas` | `1` | Minimum number of replicas |

helm/mail/templates/service.yaml

@@ -18,5 +18,6 @@ spec:
       targetPort: smtp
       protocol: TCP
       name: smtp
+      {{ if eq .Values.service.type "NodePort" }}nodePort: {{ .Values.service.nodePort }}{{ end }}
   selector:
     {{- $selectorLabels | nindent 4 }}

helm/mail/values.yaml

@@ -19,6 +19,7 @@ service:
   port: 587
   labels: {}
   annotations: {}
+  # nodePort:
 
 resources: {}
   # We usually recommend not to specify default resources and to leave this as a conscious