Been busy today setting up puppet on a Xen virtual environment. 5 virtual machines in my lab managed by puppet.
Puppet is a system that enabled you to manage configuration files and information across multiple hosts.
I really dont know what I've been doing without it. Basicly you can setup your configuration profile and all machines current and future consume that configuration set.
Today I have been trying it with distributiong sudoers, ldap authentication, nfs configuration, firewall.. It's really usefull.
I definiently recomend this for anyone that wants a "standardized multinode environment".