Add StatefulSet deployment for postfix

Author: Deltachaos

mailu/README.md

@@ -437,11 +437,13 @@ Check that the deployed pods are all running.
 ### Postfix parameters
 
 | Name                                            | Description                                                                           | Value               |
-| ----------------------------------------------- | ------------------------------------------------------------------------------------- | ------------------- |
+|-------------------------------------------------|---------------------------------------------------------------------------------------|---------------------|
 | `postfix.logLevel`                              | Override default log level                                                            | `""`                |
 | `postfix.image.repository`                      | Pod image repository                                                                  | `mailu/postfix`     |
 | `postfix.image.tag`                             | Pod image tag (defaults to mailuVersion if set, otherwise Chart.AppVersion)           | `""`                |
 | `postfix.image.pullPolicy`                      | Pod image pull policy                                                                 | `IfNotPresent`      |
+| `postfix.kind`                                  | Kind of resource to create for postfix (`Deployment` or `StatefulSet`)                | `Deployment`        |
+| `postfix.replicaCount`                          | Number of front replicas to deploy (only for `StatefulSet` kind)                      | `StatefulSet`       |
 | `postfix.persistence.size`                      | Pod pvc size                                                                          | `20Gi`              |
 | `postfix.persistence.storageClass`              | Pod pvc storage class                                                                 | `""`                |
 | `postfix.persistence.accessModes`               | Pod pvc access modes                                                                  | `["ReadWriteOnce"]` |

mailu/templates/postfix/deployment.yaml

@@ -13,7 +13,12 @@ metadata:
   annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
   {{- end }}
 spec:
+  {{- if eq .Values.postfix.kind "StatefulSet" }}
+  replicas: {{ .Values.postfix.replicaCount }}
+  podManagementPolicy: "Parallel"
+  {{- else }}
   replicas: 1
+  {{- end }}
   {{- if .Values.postfix.updateStrategy }}
   strategy: {{- toYaml .Values.postfix.updateStrategy | nindent 4 }}
   {{- end }}
@@ -140,9 +145,11 @@ spec:
                 - '! /usr/libexec/postfix/master -t'
           {{- end }}
       volumes:
+        {{- if not eq .Values.postfix.kind "StatefulSet" }}
         - name: data
           persistentVolumeClaim:
             claimName: {{ include "mailu.postfix.claimName" . }}
+        {{- end }}
         {{- if .Values.postfix.overrides }}
         - name: overrides
           configMap:
@@ -151,3 +158,40 @@ spec:
         {{- if .Values.postfix.extraVolumes }}
         {{- include "common.tplvalues.render" (dict "value" .Values.postfix.extraVolumes "context" $) | nindent 8 }}
         {{- end }}
+{{- if eq .Values.postfix.kind "StatefulSet" }}
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+        labels: {{- include "common.labels.standard" . | nindent 10 }}
+          app.kubernetes.io/component: postfix
+          {{- if .Values.postfix.persistence.labels }}
+          {{- include "common.tplvalues.render" ( dict "value" .Values.postfix.persistence.labels "context" $ ) | nindent 10 }}
+          {{- end }}
+          {{- if .Values.commonLabels }}
+          {{- include "common.tplvalues.render" ( dict "value" .Values.commonLabels "context" $ ) | nindent 10 }}
+          {{- end }}
+        {{- if or .Values.postfix.persistence.annotations .Values.commonAnnotations }}
+        annotations:
+          {{- if .Values.postfix.persistence.annotations }}
+          {{- include "common.tplvalues.render" ( dict "value" .Values.postfix.persistence.annotations "context" $ ) | nindent 10 }}
+          {{- end }}
+          {{- if .Values.commonAnnotations }}
+          {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 10 }}
+          {{- end }}
+        {{- end }}
+      spec:
+        accessModes:
+          {{- range .Values.postfix.persistence.accessModes }}
+          - {{ . | quote }}
+          {{- end }}
+        resources:
+          requests:
+            storage: {{ .Values.postfix.persistence.size | quote }}
+        {{- if .Values.postfix.persistence.selector }}
+        selector: {{- include "common.tplvalues.render" (dict "value" .Values.postfix.persistence.selector "context" $) | nindent 10 }}
+        {{- end }}
+        {{- if .Values.postfix.persistence.dataSource }}
+        dataSource: {{- include "common.tplvalues.render" (dict "value" .Values.postfix.persistence.dataSource "context" $) | nindent 10 }}
+        {{- end }}
+        {{- include "common.storage.class" (dict "persistence" .Values.postfix.persistence "global" .Values.global) | nindent 8 }}
+{{- end }}

mailu/templates/postfix/pvc.yaml

@@ -1,5 +1,5 @@
 ---
-{{- if not .Values.persistence.single_pvc }}
+{{- if not .Values.persistence.single_pvc and eq .Values.postfix.kind "Deployment" }}
 kind: PersistentVolumeClaim
 apiVersion: v1
 metadata:

mailu/values.yaml

@@ -1100,6 +1100,12 @@ postfix:
     tag: ""
     pullPolicy: IfNotPresent
 
+  ## @param postfix.kind Kind of resource to create for postfix (`Deployment` or `StatefulSet`)
+  kind: Deployment
+
+  ## @param postfix.replicaCount Number of front replicas to deploy (only for `StatefulSet` kind)
+  replicaCount: 1
+
   ## Pod persistence (if not using single_pvc)
   ## @param postfix.persistence.size Pod pvc size
   ## @param postfix.persistence.storageClass Pod pvc storage class