Merge pull request #121 from eminn/fix-custom-volume (#22190)

Signed-off-by: devOpsHelm <devops+1@hazelcast.com>

stable/hazelcast-jet/Chart.yaml

@@ -1,15 +1,15 @@
 apiVersion: v1
-appVersion: "4.0"
+appVersion: "4.1"
 tillerVersion: ">=2.7.2"
 kubeVersion: ">=1.9.0-0"
 description: Hazelcast Jet is an application embeddable, distributed computing engine built on top of Hazelcast In-Memory Data Grid (IMDG). With Hazelcast IMDG providing storage functionality, Hazelcast Jet performs parallel execution to enable data-intensive applications to operate in near real-time.
 name: hazelcast-jet
-version: 1.5.1
+version: 1.6.0
 keywords:
   - hazelcast
   - jet
   - streaming
-home: http://jet.hazelcast.org/
+home: https://jet-start.sh
 icon: http://hazelcast.com/images/logos/Hazelcast-Jet-Logo-Orange_Dark_Icon_200px.png
 sources:
   - https://github.com/hazelcast/hazelcast-jet

stable/hazelcast-jet/README.adoc

@@ -216,6 +216,9 @@ service |`+8080+`
 
 |`+metrics.service.annotations+` |Annotations for the Prometheus discovery |
 
+|`+customVolume+` |Configuration for a volume which will 
+be mounted as `/data/custom' (e.g. to mount a volume with custom JARs) |`+nil+`
+
 |`+managementcenter.enabled+` |Turn on and off Hazelcast Jet Management Center
 application |`+true+`
 
@@ -430,6 +433,60 @@ $ helm install --name my-jet-release \
 ----
 endif::[]
 
+=== Adding custom JAR files to the classpath
+
+You can mount any volume which contains your JAR files
+to the pods created by helm chart using `customVolume` configuration.
+
+When the `customVolume` set, it will mount provided volume to the pod 
+on `/data/custom` path.
+This path also appended to the classpath of running Java process.
+
+For example, if you have existing host path Persistent Volume and
+Persistent Volume Claims like below;
+
+[source,yaml]
+----
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: jet-hostpathpv-volume
+  labels:
+    type: local
+spec:
+  storageClassName: manual
+  capacity:
+    storage: 1Gi
+  accessModes:
+    - ReadWriteOnce
+  hostPath:
+    path: "/path/to/my/jars"
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: jet-pv-claim
+spec:
+  storageClassName: manual
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+----
+
+You can configure your Helm chart to use it like below in your `values.yaml`
+file. 
+[source,yaml]
+----
+customVolume:
+  persistentVolumeClaim:
+    claimName: jet-pv-claim
+----
+
+See https://kubernetes.io/docs/concepts/storage/[Volumes] section on the
+Kubernetes documentation for other available options.
+
 == Notable changes
 
 === 1.4.0

stable/hazelcast-jet/templates/statefulset.yaml

@@ -98,7 +98,15 @@ spec:
         volumeMounts:
         - name: hazelcast-jet-storage
           mountPath: /data/hazelcast-jet
+        {{- if .Values.customVolume }}
+        - name: hazelcast-jet-custom-volume
+          mountPath: /data/custom
+        {{- end }}
         env:
+        {{- if .Values.customVolume }}
+        - name: CLASSPATH
+          value: "/data/custom:/data/custom/*"
+        {{- end }}
         {{- if .Values.metrics.enabled }}
         - name: PROMETHEUS_PORT
           value: "{{ .Values.metrics.service.port }}"
@@ -126,3 +134,7 @@ spec:
       - name: hazelcast-jet-storage
         configMap:
           name: {{ template "hazelcast-jet.fullname" . }}-configuration
+      {{- if .Values.customVolume }}
+      - name: hazelcast-jet-custom-volume
+{{ toYaml .Values.customVolume | indent 8 }}
+      {{- end }}

stable/hazelcast-jet/values.yaml

@@ -5,7 +5,7 @@ image:
   # repository is the Hazelcast Jet image name
   repository: "hazelcast/hazelcast-jet"
   # tag is the Hazelcast Jet image tag
-  tag: "4.0"
+  tag: "4.1"
   # pullPolicy is the Docker image pull policy
   # It's recommended to change this to 'Always' if the image tag is 'latest'
   # ref: http://kubernetes.io/docs/user-guide/images/#updating-images
@@ -220,6 +220,9 @@ metrics:
       prometheus.io/path: "/metrics"
       prometheus.io/port: "8080"
 
+# customVolume is the configuration for a volume will be mounted as '/data/custom/' (e.g. to mount a volume with custom JARs)
+# customVolume:
+
 # Hazelcast Jet Management Center application properties
 managementcenter:
   # enabled is a flag to enable Hazelcast Jet Management Center application
@@ -231,7 +234,7 @@ managementcenter:
     # repository is the Hazelcast Jet Management Center image name
     repository: "hazelcast/hazelcast-jet-management-center"
     # tag is the Hazelcast Jet Management Center image tag
-    tag: "4.0"
+    tag: "4.1"
     # pullPolicy is the Docker image pull policy
     # It's recommended to change this to 'Always' if the image tag is 'latest'
     # ref: http://kubernetes.io/docs/user-guide/images/#updating-images