If you're using MySQL replication, then you're probably counting
on it for some fairly important need. Monitoring via something
like Nagios is generally considered a best practice. This article
assumes you've already got your Nagios server setup and your
intention is to add a Ubuntu 10.04 NRPE client. This article also
assumes the Ubuntu 10.04 NRPE client is your MySQL replication
master, not the slave. The OS of the slave does not matter.
Getting the Nagios NRPE client setup on Ubuntu 10.04
At first it wasn't clear what packages would be appropriate
packages to install. I was initially misled by the naming of the
nrpe package, but I found the correct packages to be:
sudo apt-get install nagios-nrpe-server nagios-plugins
The NRPE configuration is stored in
/etc/nagios/nrpe.cfg, while the plugins are
/usr/lib/nagios/plugins/ (or lib64).
The installation of this package …