Added better support for LoadBalancer service

Author: etoensfeldt

README.md

@@ -119,7 +119,7 @@ However, keep in mind that the persitant volumes of the mongodb container don't
 | `image.repository`                | OPC-Router image registry.                                                                              | `opcrouter/service` |
 | `image.tag`                       | OPC-Router image tag (immutable tags are recommended).                                                  | `""`                |
 | `image.pullPolicy`                | OPC-Router image pull policy.                                                                           | `IfNotPresent`      |
-| `envVars`                         | Array of environment variables for the opc router container.                                            | `[]]`               |
+| `envVars`                         | Array of environment variables for the opc router container.                                            | `[]`               |
 | `serviceAccount.create`           | Specifies whether a service account should be created.                                                  | `true`              |
 | `serviceAccount.annotations`      | Annotations to add to the service account.                                                              | `{}`                |
 | `serviceAccount.name`             | Name of the service account to use. If not set and create is true, it is generated using the fullname.  | `""`                |
@@ -142,6 +142,8 @@ However, keep in mind that the persitant volumes of the mongodb container don't
 | `service.type`                    | Type of the service. Possible values: ClusterIP, NodePort, LoadBalancer.                                | `ClusterIP`         |
 | `service.port`                    | Internal port. The service will be reachable under this port inside the cluster.                        | `27017`             |
 | `service.nodePort`                | External port. When NodePort, this port will allow external access to the service.                      | `""`                |
+| `service.externalIPs`             | External IPs. Reachable under these IPs, when traffic ingresses into cluster with IPs as destination.   | `[]`                |
+| `service.loadBalancerIP`          | LoadBalancer IP. Used by some cloud providers to add external load balancers.                           | `""`                |
 
 ## **WARNING: MongoDB root password and replica key set**
 

charts/opc-router/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.1
+version: 0.1.2
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/opc-router/templates/service.yaml

@@ -15,6 +15,13 @@ spec:
       targetPort: mongodb
       protocol: TCP
       name: mongodb
+  {{- with .Values.service.externalIPs }}
+  externalIPs:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with .Values.service.loadBalancerIP }}
+  loadBalancerIP: {{ . }}
+  {{- end }}
   selector:
     {{- include "opc-router.selectorLabels" . | nindent 4 }}
 {{- end }}

charts/opc-router/values.yaml

@@ -83,6 +83,13 @@ service:
   # When list left blank, NodePort will chose a random port itself.
   # nodePort need to be in range 30000 to 32768.
   nodePort:
+  # External IPs. The serice will be reachable under these IPs from outside the cluser,
+  # when traffic ingresses into the cluster with the IPs as destination.
+  externalIPs: []
+  # LoadBalancer IP. Only used when LoadBalancer.
+  # Used by some cloud providers to add external load balancers.
+  # If not supported, it is just ignored.
+  loadBalancerIP:
 
 ingress:
   enabled: false