To validate that your node(s) have been added, run:
kubectl get nodes
That should show something like:
NAME LABELS STATUS
10.240.99.26 kubernetes.io/hostname=10.240.99.26 Ready
127.0.0.1 kubernetes.io/hostname=127.0.0.1 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 Slack.
Run an application
kubectl -s http://localhost:8080 run 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
kubectl expose rc nginx --port=80
Run the following command to obtain the IP of this service we just created. There are two IPs, the first one is internal (CLUSTER_IP), and the second one is the external load-balanced IP.
kubectl get svc nginx
Alternatively, you can obtain only the first IP (CLUSTER_IP) by running:
kubectl get svc nginx --template={{.spec.clusterIP}}
Hit the webserver with the first IP (CLUSTER_IP):
curl <insert-cluster-ip-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:
kubectl scale rc nginx --replicas=3
And list the pods
kubectl get pods
You should see pods landing on the newly added machine.