If I'm allowed a shameless plug (I'm the developer), there is ElastiCluster [1] which can deploy (among others) JupyterHub on various IaaS cloud infrastructures. We have used it at UZH to provide teaching environments for various courses. By default it only comes with the local "passwd" authenticator, but anything that works with Jupyter or Linux/PAM can be used relatively easily (= write an Ansible playbook).

Feel free to reach out to me if you would like more info.

[1]: https://gc3-uzh-ch.github.com/elasticluster