Recently, we had a publicly visible outtage as a result of one of our load balancers exceeding the IOPS capability of its system drives. We'd like to extend xymon (currently installed on CentOS6 /32 with defaults) so that it can monitor IOPS for all servers.
Specifically, we'd like to see wrqm/s and probably %util. What's the most straightforward way to accomplish this? The other alternative is to create some form of internal script, which is doable but not preferable if there's an off-the-shelf tool available.
-Ben