persistence

chart/templates/_config.yaml

@@ -42,7 +42,11 @@ type: {{ ternary "kubernetes.io/tls" "Opaque" (eq "tls" $config.type) }}
 */}}
 data:
 {{- range $fileName, $fileData := $config.data }}
+{{- if (kindIs "string" $fileData) }}
   {{ $fileName }}: {{ $fileData | b64enc | quote }}
+{{- else }}
+  {{ $fileName }}: {{ $fileData | toYaml | b64enc | quote }}
+{{- end }}
 {{- end }}
 {{- else }}
 {{- with $config.data }}

chart/templates/_persistence.yaml

@@ -0,0 +1,33 @@
+{{- define "chart.persistence" }}
+{{- if .Values.persistence.enabled }}
+
+{{- if not .Values.persistence.existingClaim }}
+---
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: {{ include "chart.fullname" . }}-spool
+  labels:
+    {{- include "chart.labels" . | nindent 4 }}
+spec:
+  storageClassName: {{ .Values.persistence.storageClass }}
+  accessModes:
+    - {{ .Values.persistence.accessMode | quote }}
+  resources:
+    requests:
+      storage: {{ .Values.persistence.size | quote }}
+{{- end }}
+
+{{- $_ := set $.Values "volumeMounts" (append $.Values.volumeMounts (dict
+  "name" "spool"
+  "mountPath" "/var/spool/postfix"
+)) }}
+{{- $_ := set $.Values "volumes" (append $.Values.volumes (dict
+  "name" "spool"
+  "persistentVolumeClaim" (dict
+    "claimName" (.Values.persistence.existingClaim | default (print (include "chart.fullname" .) "-spool"))
+  )
+)) }}
+
+{{- end }}
+{{- end }}

chart/templates/deployment.yaml

@@ -1,4 +1,5 @@
 {{- template "chart.config" . }}
+{{- template "chart.persistence" . }}
 ---
 apiVersion: apps/v1
 kind: Deployment

chart/values.yaml

@@ -31,6 +31,14 @@ config:
   env:
     type: env
 
+# /var/spool/postfix
+persistence:
+  enabled: false
+  existingClaim: ""
+  storageClass: ""
+  accessMode: ReadWriteOnce
+  size: 1Gi
+
 replicaCount: 1
 
 image: