DNSOnly Updates / Auto reboot

Hi Everyone, I have a DNS cluster with 6 members. (geographically diverse) They update automatically (good) but then sit there waiting patiently for me to log in to see if they need to reboot.

• At the very least, couldn't they send an email when the need to restart? Email works from the boxes, they email me about other stuff.
• Better still why not just let them auto-reboot? DNS is the way it is for a reason. A single box being unavailable for a few minutes will barely be noticeable.

I know I could build something around whmapi1 system_needs_reboot
but is there a better option. eg post update hooks?