Make READMEs clearer wrt versions

build/mark-new-version.sh

@@ -92,8 +92,13 @@ fi
 echo "+++ Versioning documentation and examples"
 
 # Update the docs to match this version.
-$SED -ri -e "s/HEAD/${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}/" docs/README.md
-$SED -ri -e "s/HEAD/${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}/" examples/README.md
+DOCS_TO_EDIT=(docs/README.md examples/README.md)
+for DOC in "${DOCS_TO_EDIT[@]}"; do
+  $SED -ri \
+      -e "s/HEAD/${NEW_VERSION}/" \
+      -e "/<!-- BEGIN STRIP_FOR_RELEASE -->/,/<!-- END STRIP_FOR_RELEASE -->/d" \
+      "${DOC}"
+done
 
 # Update API descriptions to match this version.
 $SED -ri -e "s|(releases.k8s.io)/HEAD|\1/${NEW_VERSION}|" pkg/api/v[0-9]*/types.go

docs/README.md

-# Kubernetes Documentation
+# Kubernetes Documentation: HEAD
 
-**Note**
-This documentation is current for HEAD.
+<!-- BEGIN STRIP_FOR_RELEASE -->
 
-Documentation for previous releases is available at
-http://releases.k8s.io/vX.Y.Z/docs.
-   * [releases.k8s.io/v0.20.0](http://releases.k8s.io/v0.20.0/docs)
-   * [releases.k8s.io/v0.19.0](http://releases.k8s.io/v0.19.0/docs)
-   * [releases.k8s.io/v0.18.1](http://releases.k8s.io/v0.18.1/docs)
-   * [releases.k8s.io/v0.17.1](http://releases.k8s.io/v0.17.1/docs)
+<h1>*** PLEASE NOTE: This documentation applies to the HEAD of the source
+tree only. If you are using a released version of Kubernetes, you almost
+certainly want the docs that go with that version.</h1>
+
+<strong>Documentation for specific releases can be found at
+[releases.k8s.io](http://releases.k8s.io).</strong>
+
+<!-- END STRIP_FOR_RELEASE -->
+
+## Where to start
 
 * The [User's guide](user-guide.md) is for anyone who wants to run programs and
   services on an existing Kubernetes cluster.

examples/README.md

-# Examples
+# Kubernetes Examples: HEAD
 
-This directory contains a number of different examples of how to run applications with Kubernetes.
+<!-- BEGIN STRIP_FOR_RELEASE -->
 
-**Note**
-This documentation is current for HEAD.  
+<h1>*** PLEASE NOTE: These examples apply to the HEAD of the source
+tree only. If you are using a released version of Kubernetes, you almost
+certainly want the examples that go with that version.</h1>
 
-Examples for previous releases is available in their respective branches:
-   * [v0.19.0](https://github.com/GoogleCloudPlatform/kubernetes/tree/master/release-0.19.0/examples)
-   * [v0.18.1](https://github.com/GoogleCloudPlatform/kubernetes/tree/release-0.18/examples)
-   * [v0.17.1](https://github.com/GoogleCloudPlatform/kubernetes/tree/release-0.17/examples)
+<strong>Examples for specific releases can be found at
+[releases.k8s.io](http://releases.k8s.io).</strong>
+
+<!-- END STRIP_FOR_RELEASE -->
+
+##
+
+This directory contains a number of different examples of how to run
+applications with Kubernetes.
 
 
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