We're running munin for some out of the box monitoring fun, which can be seen at https://www.tardis.ed.ac.uk/restricted/munin/.

To add a new host to this, on the box you wish to monitor:

colin:~# apt-get install munin-node
...
colin:~# vim /etc/munin/munin-node.conf

and add…

allow ^193\.62\.81\.11$

Also on davros, edit /etc/munin/munin.conf to add:

[colin.tardis.ed.ac.uk]
    address 193.62.81.8
    use_node_name yes