Nagios is pretty standard for monitoring.
Administration is usually custom automation. There are a lot of tools for this, and they all have good and bad, so you should just go with what is most accessible to you.
Administration is usually custom automation. There are a lot of tools for this, and they all have good and bad, so you should just go with what is most accessible to you.
Maybe, it is good way to use one of them, but it so hard to find day for configuration of all of this =)