HPC playbooks

The users.yml playbook contains users and public keys. The playbook uses /etc/hosts as a database for hosts to install the keys on.

usage:

• Make changes to a local checkout of this repo.
• git commit the changes, git push and git pull on xcat.
• on xcat:

git pull
ansible-playbook users.yml # this will install the users on all hosts in /etc/hosts.