This ansible role was based on the following cookbooks and roles:
https://github.com/networklore/ansible-role-nagios - Patrick Ogenstad
https://github.com/networklore/ansible-role-nrpe-client
https://github.com/npm/ansible-nagios-config - Benjamin E. Coe
https://github.com/schubergphilis/nrpe
https://github.com/schubergphilis/nagios
https://github.com/chef-cookbooks/users
https://github.com/mivok/ansible-users