I have several servers and I would like to be able to monitor their hardware health using Nagios. The servers are different brands (Dell, HP, IBM) and run WIndows 2003 and Windows 2008. I already have Nagios and NSClient++ communicating and reporting the status of different services and the disk space usage, but I need to be able to monitor CPU temperatures, RAID status, hard drive temperatures, UPS status, etc. Is there a guide on how I can monitor the hardware components of my servers with Nagios?
Do I need to install Dell OpenManage or the HP equivelant on every single server I wish to monitor?