fix: Allow set externalIPs (#499)

* fix: Allow set externalIPs

This pull request allows to set externalIPs for external-service

* Update README.md

* add documentation entry in values.yaml

---------

Co-authored-by: Andrii Shestakov <[email protected]>

Author: andriishestakov

charts/mailu/README.md

@@ -328,6 +328,7 @@ helm uninstall mailu --namespace=mailu-mailserver
 | `front.externalService.enabled`               | Expose front mail ports via external service (ClusterIP or LoadBalancer)              | `false`         |
 | `front.externalService.type`                  | Service type (ClusterIP or LoadBalancer)                                              | `ClusterIP`     |
 | `front.externalService.externalTrafficPolicy` | Service externalTrafficPolicy (Cluster or Local)                                      | `Local`         |
+| `front.externalService.externalIPs`           | Service externalIPs                                                                   | `[]`            |
 | `front.externalService.loadBalancerIP`        | Service loadBalancerIP                                                                | `""`            |
 | `front.externalService.annotations`           | Service annotations                                                                   | `{}`            |
 | `front.externalService.labels`                | Service labels                                                                        | `{}`            |

charts/mailu/templates/front/service-external.yaml

@@ -27,6 +27,10 @@ spec:
   {{- if .loadBalancerIP }}
   loadBalancerIP: {{ .loadBalancerIP }}
   {{- end }}
+  {{- if .externalIPs }}
+  externalIPs:
+  {{- toYaml .externalIPs | nindent 4 }}
+  {{- end }}
   ports:
     {{- if .ports.pop3 }}
     - name: pop3

charts/mailu/values.yaml

@@ -719,6 +719,7 @@ front:
   ## @param front.externalService.enabled Expose front mail ports via external service (ClusterIP or LoadBalancer)
   ## @param front.externalService.type Service type (ClusterIP or LoadBalancer)
   ## @param front.externalService.externalTrafficPolicy Service externalTrafficPolicy (Cluster or Local)
+  ## @param front.externalService.externalIPs Service externalIPs
   ## @param front.externalService.loadBalancerIP Service loadBalancerIP
   ## @param front.externalService.annotations Service annotations
   ## @param front.externalService.labels Service labels
@@ -745,6 +746,7 @@ front:
     ## type: LoadBalancer
     loadBalancerIP: ""
     externalTrafficPolicy: Local
+    externalIPs: []
     annotations: {}
     labels: {}
     ports: