Jupyterhub on Kubernetes

Jupyterhub promises to be a tremendous resource for the classroom. However, setting up scalable infrastructure is a non-trivial task.  

There is a good tutorial, but I've not been able to get it to work. 
https://cloud.google.com/solutions/using-tensorflow-jupyterhub-classrooms  

There is a free trial with $300 on google Cloud to try it out. 