PR #14 follow-up: Use storageClassName and document new postgres var a little more.

README.md

@@ -64,14 +64,16 @@ If you would like to deploy AWX (the open source upstream of Tower) into your cl
       tower_task_image: ansible/awx_task:9.0.1
       tower_web_image: ansible/awx_web:9.0.1
 
-### Persistent storage for postfix
+### Persistent storage for Postgres
 
-If you need to deploy your persistent storage for postfix to a specific storage class, you can override the default variables in the Tower `spec` with the variable `tower_postgres_storage_class` variable:
+If you need to use a specific storage class for Postgres' storage, specify `tower_postgres_storage_class` in your Tower spec:
 
     ---
     spec:
       ...
-      tower_postgres_storage_class: managed-nfs-storage
+      tower_postgres_storage_class: fast-ssd
+
+If it's not specified, Postgres will store it's data on a volume using the default storage class for your cluster.
 
 ## Development
 

deploy/crds/tower_v1alpha1_tower_cr_awx.yaml

@@ -29,3 +29,4 @@ spec:
   tower_postgres_pass: awxpass
   tower_postgres_image: postgres:9.6
   tower_postgres_storage_request: 8Gi
+  tower_postgres_storage_class: ''

deploy/crds/tower_v1alpha1_tower_cr_tower.yaml

@@ -29,3 +29,4 @@ spec:
   tower_postgres_pass: awxpass
   tower_postgres_image: postgres:9.6
   tower_postgres_storage_request: 8Gi
+  tower_postgres_storage_class: ''

roles/tower/defaults/main.yml

@@ -31,3 +31,4 @@ tower_rabbitmq_image: rabbitmq:3
 tower_postgres_pass: awxpass
 tower_postgres_image: postgres:9.6
 tower_postgres_storage_request: 8Gi
+tower_postgres_storage_class: ''

roles/tower/templates/tower_postgres.yaml.j2

@@ -53,13 +53,12 @@ spec:
   volumeClaimTemplates:
     - metadata:
         name: postgres
-{% if tower_postgres_storage_class is defined %}
-        annotations:
-          volume.beta.kubernetes.io/storage-class: '{{ tower_postgres_storage_class }}'
-{% endif %}
       spec:
         accessModes:
           - ReadWriteOnce
+{% if tower_postgres_storage_class != '' %}
+        storageClassName: '{{ tower_postgres_storage_class }}'
+{% endif %}
         resources:
           requests:
             storage: '{{ tower_postgres_storage_request }}'