We often create graphs showing the same metric on a number of servers – for example, I have a single Graph which shows the CPU usage on all 10 of my web servers (one line on the graph per server).

But if I add an 11th web server, now I have to go add it to each of those graphs as well. I'd like to have some way to configure this automatically, e.g.:

• I want a graph of the CPU usage on all servers in the "web" hostgroup.
• I want a graph of disk usage on all servers which are linked to the "diskserver" template.