I've got several servers serving some websites.
I've got Munin set up so I can track things like memory consumption, disk usage, etc.
What I'd like to have now would be a way to get emails if something goes "wrong". Let me be more specific:
- I'd like to get an email if any of my websites is down (timeouts)
- I'd like to get an email if my postfix mail is not responding (Not from the same mail server, of course) This can be accomplished by a telnet command, I'm told.
From what I've read, Munin isn't quite the tool for this. It can send you emails, but the conditions it detects seem to be only of type "xxx exceeds the threshold" - i.e. "memory is 95% full".
Am I correct about Munin? If yes, what is the easiest way of accomplishing this? Maybe Nagios?