nginx must listen on 0.0.0.0 for "forwarding graphite".  Similarly for statsd.
Makefile: document "how we got the 'ansible_hosts;' file
Vagrantfile: correctly forward 'nginx' (port 80); add all service control-ports; shell-provisioner (example) installs some packages
roles/nginx/defaults/main.yml:  nginx needs to listen on all interfaces
roles/statsd/templates/localConfig.js.j2:  statsd needs to listen on all interfaces