What are your most useful/valued Nagios plugins? [closed]

Solution 1:

In terms of flexibility, you can't beat the snmp plugin. It's behind nearly every check I run, and if that isn't, the TCP connect is.

Solution 2:

Our most useful plugins are one which test our higher application functionality. For example, we have tests that try to log into the website and tests that try to send an email and check check a pop3 mail box to make sure it arrived. If any of those things break, then we can use lower level checks to see what is wrong. Is the pop3 dead? the MTA, the MDA? The database server? the datastore?

Solution 3:

Honestly, the one that does the most for me is plain old check_disk. Nothing makes me feel quite so special, in that "stop eating the paste" way, as having a server that was running fine yesterday blow up, running around like mad and then finding out it's because I let the disks fill up. Never having to do that again in my life is worth a lot to me.

(And don't forget to check the inodes, too, kids watching at home.)