SNMP, MRTG and Debian linux boxen
I've been playing around with graphing network activity by send snmp requests to managed siwtches and checking the ifindex, and then graphing this data with MRTG.
Nagios is also being used for alarms, and currently monitors load on routers and servers, and temperature on some of the routers.
I would like to use MRTG to graph things like load, number of users logged on, disk space remaining, number of processes, number of network connections, temperature* etc. but I'm unsure as to how I would make this data available to the machine running MRTG collection crons.
I am aware of snmpd for debian, but I'm unsure as to whether everything I plan to graph is possible.
How does snmpd collect it's information about the machine it's running on?
Are there any kernel-level features which need to be compiled (static or module)?
Thanks in advance for any help or advice.
John
*the servers are mostly Dell 2650s and similar boxes, which afaik use a closed-IP Adaptec HW monitoring chip. Which sucks. Apparently Dell have a rpm binary for it, but is for an antiquated version of RedHat.
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