Ask HN: Simple server metric monitoring tools?

[uvu]

Is there a simple server metric monitoring tools which does not need to configure a lots.

What I mean simple is, just want to set how much CPU%, RAM% and Disk space usage and when server got over that percentage then create alert.

Is there simple tool like this? I saw once on HN and now I can't search it back.

[remux]

Did you mean Nagios? Nagios shows you everything. Only the installation takes longer than 2 minutes.

[1] https://www.nagios.org/downloads/

[speedgoose]

Munin is nice too.