Add Ceph RBD storageclass support

Change-Id: I90795e7b89833ce780796f556dc1f34cfa78af64
Implements: PROD-22552
diff --git a/README.rst b/README.rst
index 5eab3ee..7ec845b 100644
--- a/README.rst
+++ b/README.rst
@@ -708,6 +708,25 @@
                   server: 10.0.0.1
                   path: /exported_path
 
+Ceph RBD storageclass integration.
+
+.. code-block:: yaml
+
+    kubernetes:
+      common:
+        addons:
+          storageclass:
+            rbd:
+              enabled: True
+              default: True
+              provisioner: rbd
+              name: rbd
+              user_id: kubernetes
+              user_key: AQAOoo5bGqtPExAABGSPtThpt5s+iq97KAE+WQ==
+              monitors: cmn01:6789,cmn02:6789,cmn03:6789
+              pool: kubernetes
+              fstype: ext4
+
 Kubernetes namespaces
 ---------------------