These are a couple of helper scripts to facilitate the automatic creation and deletion of machine hostnames and CNAME records at boot and shutdown/reboot as well as handling removing a node from puppet on shutdown/reboot.

Simply put startup.sh and shutdown.sh into /usr/sbin and edit them to set the necessary variables.

Add something like this to your rc.local to run the startup script: /bin/bash /usr/sbin/startup.sh 1> /tmp/startup.out 2>&1

And you can use provided shutdown-init init script to run the shutdown/reboot script.

That's it!