Roles defined:

common:		The basis for all node types

		Includes:
		* Firewall disabled
		* NTP setup
		* NetworkManager disabled
		* Repositories set up
		* /etc/{hosts,resolv.conf} set yp
		* Passwordless ssh enabled between cluster nodes
		* Timezone set as configured
		* Syslog configured to log with high resolution timestamps

ad:		Samba AD installed and configured

build:		Development and packaging tools installed

clusterfs:	Cluster filesystem is installed

ctdb:		CTDB packages installed, nodes file created

		Depends: nasrepos

nas:		CTDB, Samba, NFS installed and configured

		Depends: clusterfs, nasrepos, ctdb

nasrepos:	Samba/CTDB package repositories configured

storage:	Cluster filesystem configured and accessible

		Depends: clusterfs