[#443] add persistence to example datagrid as an option

Signed-off-by: Bob Claerhout <bob.claerhout@aloxy.io>

Author: Bob Claerhout

charts/hono/Chart.yaml

@@ -15,7 +15,7 @@ name: hono
 description: |
   Eclipse Hono™ provides remote service interfaces for connecting large numbers of IoT devices to a back end and
   interacting with them in a uniform way regardless of the device communication protocol.
-version: 2.2.1
+version: 2.2.2
 # Version of Hono being deployed by the chart
 appVersion: 2.2.0
 keywords:

charts/hono/config/infinispan/hono-data-grid.xml

@@ -38,7 +38,20 @@
       <security>
         <authorization enabled="true" />
       </security>
+      {{- if .Values.dataGridExample.persistence.enabled }}
+      <persistence passivation="false">
+        <file-store>
+          <index path="/opt/infinispan/server/data/index" />
+          <data path="/opt/infinispan/server/data/data" />
+        </file-store>
+      </persistence>
+      {{- end }}
     </distributed-cache>
+    {{- if .Values.dataGridExample.persistence.enabled }}
+    <global-state>
+      <persistent-location path="/opt/infinispan/server/data"/>
+    </global-state>
+    {{- end }}
   </cache-container>
 
   <server xmlns="urn:infinispan:server:13.0">

charts/hono/templates/example-data-grid/pvc.yaml

@@ -0,0 +1,13 @@
+{{- if .Values.dataGridExample.persistence.enabled -}}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  {{- $args := dict "dot" . "component" "data-grid" "name" "data-grid-pvc" }}
+  {{- include "hono.metadata" $args | nindent 2 }}
+spec:
+ accessModes:
+ - ReadWriteOnce
+ resources:
+   requests:
+     storage: {{ .Values.dataGridExample.persistence.pvcSize }}
+{{- end }}

charts/hono/templates/example-data-grid/statefulset.yaml

@@ -65,6 +65,10 @@ spec:
           name: conf
           subPath: mgmt-groups.properties
           readOnly: true
+        {{- if .Values.dataGridExample.persistence.enabled }}
+        - name: storage
+          mountPath: /opt/infinispan/server/data
+        {{- end}}
         {{- include "hono.component.healthChecks" $args | nindent 8 }}
         {{- with .Values.dataGridExample.resources }}
         resources:
@@ -75,4 +79,10 @@ spec:
       - name: conf
         configMap:
           name: {{ printf "%s-%s-conf" .Release.Name $args.name }}
+      {{- if .Values.dataGridExample.persistence.enabled }}
+      - name: storage
+        persistentVolumeClaim:
+          claimName: {{ printf "%s-%s-pvc" .Release.Name $args.name | quote }}
+      {{- end}}
+
 {{- end }}

charts/hono/values.yaml

@@ -1983,6 +1983,13 @@ dataGridExample:
   # dataMaxSize contains the maximum size of off-heap memory used for storing data per Infinispan node
   dataMaxSize: "30 MB"
 
+  # persistence contains configuration on the dataGrid persitence settings.
+  persistence:
+    # enabled defines whether or not persistence is enabled for the example dataGrid
+    enabled: false
+    # pvcSize determines the size of the pvc created to write the cache data to
+    pvcSize: "100M"
+
 jaegerBackendExample:
 
   # enabled indicates whether the example Jaeger all-in-one