Add option to define a pre-known nodeport range for service ports (#123)

Author: dfangl

charts/localstack/templates/service.yaml

@@ -47,10 +47,13 @@ spec:
       containerPort: 53
       protocol: UDP
     {{- end }}
-    {{- range untilStep (.Values.service.externalServicePorts.start|int) (.Values.service.externalServicePorts.end|int) 1 }}
-    - name: "external-service-port-{{ . }}"
-      port: {{ . }}
-      targetPort: "ext-svc-{{ . }}"
+    {{- range $index, $port := untilStep (.Values.service.externalServicePorts.start|int) (.Values.service.externalServicePorts.end|int) 1 }}
+    - name: "external-service-port-{{ $port }}"
+      port: {{ $port }}
+      targetPort: "ext-svc-{{ $port }}"
+    {{- with $.Values.service.externalServicePorts.nodePortStart|int }}
+      nodePort: {{ add $index . }}
+    {{- end }}
     {{- end }}
   selector:
     {{- include "localstack.selectorLabels" . | nindent 4 }}

charts/localstack/values.yaml

@@ -123,6 +123,9 @@ service:
   externalServicePorts:
     start: 4510
     end: 4560
+    ## @param service.externalServicePorts.nodePortStart specifies the starting node ports the serviceports are mapped to
+    ##   has to be in the node port range configured. See https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport
+    # nodePortStart: 31510
   ## @param service.dnsService Enables or disables the exposure of the LocalStack DNS
   ##
   dnsService: false