Add a Docker multi-node setup.

docs/getting-started-guides/docker-multinode/testing.md

@@ -0,0 +1,58 @@
+## Testing your Kubernetes cluster.
+
+To validate that your node(s) have been added, run:
+
+```sh
+kubectl get nodes
+```
+
+That should show something like:
+```
+NAME           LABELS    STATUS
+10.240.99.26   <none>    Ready
+127.0.0.1      <none>    Ready
+```
+
+If the status of any node is ```Unknown``` or ```NotReady``` your cluster is broken, double check that all containers are running properly, and if all else fails, contact us on IRC at
+```#google-containers``` for advice.
+
+### Run an application
+```sh
+kubectl -s http://localhost:8080 run-container nginx --image=nginx --port=80
+```
+
+now run ```docker ps``` you should see nginx running.  You may need to wait a few minutes for the image to get pulled.
+
+### Expose it as a service:
+```sh
+kubectl expose rc nginx --port=80
+```
+
+This should print:
+```
+NAME      LABELS    SELECTOR              IP          PORT(S)
+nginx     <none>    run-container=nginx   <ip-addr>   80/TCP
+```
+
+Hit the webserver:
+```sh
+curl <insert-ip-from-above-here>
+```
+
+Note that you will need run this curl command on your boot2docker VM if you are running on OS X.
+
+### Scaling 
+
+Now try to scale up the nginx you created before:
+
+```sh
+kubectl resize rc nginx --replicas=3
+```
+
+And list the pods
+
+```sh
+kubectl get pods
+```
+
+You should see pods landing on the newly added machine.