Parameterize postgres chart's imagePullPolicy.

Also adjust the default to be IfNotPresent (Kubernetes default)
instead of Always.

stable/postgresql/Chart.yaml

@@ -1,5 +1,5 @@
 name: postgresql
-version: 0.1.0
+version: 0.1.1
 description: Chart for PostgreSQL
 keywords:
 - postgresql
@@ -12,4 +12,4 @@ sources:
 - https://github.com/docker-library/postgres
 maintainers:
 - name: swordbeta
-engine: gotpl
+engine: gotpl

stable/postgresql/README.md

@@ -46,6 +46,7 @@ The following tables lists the configurable parameters of the PostgresSQL chart
 | Parameter                  | Description                                | Default                                                    |
 | -----------------------    | ----------------------------------         | ---------------------------------------------------------- |
 | `imageTag`                 | `postgres` image tag                       | `9.5.4`                                           |
+| `imagePullPolicy`          | Image pull policy                          | `Always` if `imageTag` is `latest`, else `IfNotPresent`    |
 | `postgresUser`             | Username of new user to create.            | `potgres`                                                  |
 | `postgresPassword`         | Password for the new user.                 | random 10 characters                                       |
 | `postgresDatabase`         | Name for new database to create.           | `postgres`                                                 |
@@ -78,4 +79,4 @@ $ helm install --name my-release -f values.yaml stable/postgresql
 
 The [postgres](https://github.com/docker-library/postgres) image stores the PostgreSQL data and configurations at the `/var/lib/postgresql/data/pgdata` path of the container.
 
-The chart mounts a [Persistent Volume](kubernetes.io/docs/user-guide/persistent-volumes/) volume at this location. The volume is created using dynamic volume provisioning.
+The chart mounts a [Persistent Volume](kubernetes.io/docs/user-guide/persistent-volumes/) volume at this location. The volume is created using dynamic volume provisioning.

stable/postgresql/templates/deployment.yaml

@@ -30,7 +30,7 @@ spec:
       containers:
       - name: {{ template "fullname" . }}
         image: "postgres:{{ .Values.imageTag }}"
-        imagePullPolicy: Always
+        imagePullPolicy: {{ default "" .Values.imagePullPolicy | quote }}
         resources:
           requests:
             cpu: "{{.Values.cpu}}"
@@ -78,4 +78,4 @@ spec:
           claimName: {{ template "fullname" . }}
       {{- else }}
         emptyDir: {}
-      {{- end -}}
+      {{- end -}}

stable/postgresql/values.yaml

@@ -5,6 +5,12 @@ imageTag: "9.5.4"
 cpu: 100m
 memory: 256Mi
 
+## Specify a imagePullPolicy
+## 'Always' if imageTag is 'latest', else set to 'IfNotPresent'
+## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
+##
+# imagePullPolicy:
+
 ## Create a database user
 ## Default: postgres
 # postgresUser:
@@ -20,4 +26,4 @@ persistence:
   enabled: true
   storageClass: generic
   accessMode: ReadWriteOnce
-  size: 8Gi
+  size: 8Gi