Implemente postfix overrides configmap

charts/postfix/v0.1.0/templates/_helpers.tpl

@@ -60,3 +60,13 @@ Create the name of the service account to use
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}
 {{- end }}
+
+{{/*
+Return true if a configmap object should be created for Postfix
+*/}}
+{{- define "postfix.createConfigmap" -}}
+{{- if .Values.postfix.configuration }}
+    {{- true -}}
+{{- else -}}
+{{- end -}}
+{{- end -}}

charts/postfix/v0.1.0/templates/app.yaml

@@ -64,6 +64,12 @@ spec:
               port: 25
             initialDelaySeconds: 10
             periodSeconds: 15
+          volumeMounts:
+          {{- if .Values.postfix.configuration }}
+            - name: config
+              mountPath: /overrides/postfix.cf
+              subPath: postfix.cf
+            {{- end }} 
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
       {{- with .Values.nodeSelector }}
@@ -90,3 +96,9 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      volumes:
+        {{- if .Values.postfix.configuration }}
+        - name: config
+          configMap:
+            name: {{ include "postfix.fullname" . }}
+        {{- end }}

charts/postfix/v0.1.0/templates/configmap.yaml

@@ -0,0 +1,11 @@
+{{- if (include "postfix.createConfigmap" .) }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "postfix.fullname" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  labels: {{- include "postfix.labels" . | nindent 4 }}
+data:
+  postfix.cf: |-
+{{ .Values.postfix.configuration | indent 4 }}
+{{- end -}}

charts/postfix/v0.1.0/values.yaml

@@ -46,6 +46,7 @@ postfix:
   relayNets: 10.42.0.0/16
   senderBcc: ""
   kind: StatefulSet
+  configuration: ""
 
 autoscaling:
   enabled: false