add PV storageclass

Change-Id: I58702cc02925ab7a5b492d04551274e96efeab74
diff --git a/README.rst b/README.rst
index 71739b6..c3df5f7 100644
--- a/README.rst
+++ b/README.rst
@@ -583,13 +583,22 @@
         addons:
           storageclass:
             aws_slow:
-              name: slow
               enabled: True
               default: True
               provisioner: aws-ebs
+              name: slow
               type: gp2
               iopspergb: "10"
               zones: xxx
+            nfs_shared:
+              name: elasti01
+              enabled: True
+              provisioner: nfs
+              spec:
+                name: elastic_data
+                nfs:
+                  server: 10.0.0.1
+                  path: /exported_path
 
 Kubernetes namespaces
 ---------------------