All Hadoop-specific configurations are added to Nagios through files prefixed with
“hadoop-“ located in the /etc/nagios/objects directory of the Nagios Server host.
The default general Nagios configuration file, nagios.cfg (in
/etc/nagios), is set up to pick up the new Hadoop specific configurations from
this directory.
Hadoop-specific plugins are stored in the Nagios plugins directory. The default location is /usr/lib64/nagios/plugins/.
For security reasons the Nagios server runs as separate user named “nagios”.
