add en pages

content/en/docs/tutorials/stateful-application/cassandra.md

@@ -2,11 +2,11 @@
 title: "Example: Deploying Cassandra with a StatefulSet"
 reviewers:
 - ahmetb
-content_template: templates/tutorial
+content_type: tutorial
 weight: 30
 ---
 
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+<!-- overview -->
 This tutorial shows you how to run [Apache Cassandra](http://cassandra.apache.org/) on Kubernetes. Cassandra, a database, needs persistent storage to provide data durability (application _state_). In this example, a custom Cassandra seed provider lets the database discover new Cassandra instances as they join the Cassandra cluster.
 
 *StatefulSets* make it easier to deploy stateful applications into your Kubernetes cluster. For more information on the features used in this tutorial, see [StatefulSet](/docs/concepts/workloads/controllers/statefulset/).
@@ -23,17 +23,19 @@ nodes in the ring.
 This tutorial deploys a custom Cassandra seed provider that lets the database discover
 new Cassandra Pods as they appear inside your Kubernetes cluster.
 {{< /note >}}
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+## {{% heading "objectives" %}}
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 * Create and validate a Cassandra headless {{< glossary_tooltip text="Service" term_id="service" >}}.
 * Use a {{< glossary_tooltip term_id="StatefulSet" >}} to create a Cassandra ring.
 * Validate the StatefulSet.
 * Modify the StatefulSet.
 * Delete the StatefulSet and its {{< glossary_tooltip text="Pods" term_id="pod" >}}.
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+## {{% heading "prerequisites" %}}
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 {{< include "task-tutorial-prereqs.md" >}}
 
 To complete this tutorial, you should already have a basic familiarity with {{< glossary_tooltip text="Pods" term_id="pod" >}}, {{< glossary_tooltip text="Services" term_id="service" >}}, and {{< glossary_tooltip text="StatefulSets" term_id="StatefulSet" >}}.
@@ -48,9 +50,9 @@ minikube start --memory 5120 --cpus=4
 ```
 {{< /caution >}}
 
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+<!-- lessoncontent -->
 ## Creating a headless Service for Cassandra {#creating-a-cassandra-headless-service}
 
 In Kubernetes, a {{< glossary_tooltip text="Service" term_id="service" >}} describes a set of {{< glossary_tooltip text="Pods" term_id="pod" >}} that perform the same task.
@@ -219,9 +221,10 @@ Use `kubectl edit` to modify the size of a Cassandra StatefulSet.
     cassandra   4         4         36m
     ```
 
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+## {{% heading "cleanup" %}}
+
 Deleting or scaling a StatefulSet down does not delete the volumes associated with the StatefulSet. This setting is for your safety because your data is more valuable than automatically purging all related StatefulSet resources.
 
 {{< warning >}}
@@ -261,12 +264,13 @@ By using environment variables you can change values that are inserted into `cas
 | `CASSANDRA_RPC_ADDRESS`  | `0.0.0.0`        |
 
 
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+## {{% heading "whatsnext" %}}
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 * Learn how to [Scale a StatefulSet](/docs/tasks/run-application/scale-stateful-set/).
 * Learn more about the [*KubernetesSeedProvider*](https://github.com/kubernetes/examples/blob/master/cassandra/java/src/main/java/io/k8s/cassandra/KubernetesSeedProvider.java)
 * See more custom [Seed Provider Configurations](https://git.k8s.io/examples/cassandra/java/README.md)
 
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