OP5 Monitor - NRPE - How to install NRPE on IBM AIX

Introduction

Instructions to install NRPE agent & NRPE Plugins on IBM AIX.
This has been tested on AIX version 6.1 with 64-bit PowerPC architecture with successful result.

Installation

Download and install packages

NRPE:
sudo rpm -ivh http://www.oss4aix.org/download/RPMS/nagios-nrpe/nagios-nrpe-2.15-1.aix5.1.ppc.rpm

NRPE-plugins:
sudo rpm -ivh http://www.oss4aix.org/download/RPMS/nagios-plugins/nagios-plugins-2.1.3-1.aix5.1.ppc.rpm

Configure NRPE

Create a nrpe.cfg file

sudo touch /opt/freeware/etc/nagios-nrpe/nrpe.cfg

Example content for nrpe.cfg

log_facility=daemon
pid_file=/var/run/nrpe.pid
server_port=5666
nrpe_user=nrpe
nrpe_group=nrpe
allowed_hosts=<ADRESS-TO-MONITOR-SERVER>
dont_blame_nrpe=0
debug=0
command_timeout=60
connection_timeout=300
include_dir=/opt/freeware/etc/nagios-nrpe/nrpe.d

Create a commands configuration

sudo touch /opt/freeware/etc/nagios-nrpe/nrpe.d/op5_commands.cfg

Example content for op5_commands.cfg:

command[load]=/usr/libexec/nagios/check_load -w 2,3,4 -c 4,5,6
command[users]=/usr/libexec/nagios/check_users -w 5 -c 10
command[swap]=/usr/libexec/nagios/check_swap -w 20% -c 10%
command[root_disk]=/usr/libexec/nagios/check_disk -w 20% -c 10% -p / -m
command[procs_zombie]=/usr/libexec/nagios/check_procs -w 5 -c 10 -s Z
command[procs_total]=/usr/libexec/nagios/check_procs -w 150 -c 200
command[procs_init]=/usr/libexec/nagios/check_procs -w 1: -c 1:2 -C init

Example content for op5_commands.cfg (with arguments allowed):
To use this you need to set dont_blame_nrpe=1 in nrpe.cfg. 

command[load]=/usr/libexec/nagios/check_load -w $ARG1$ -c $ARG2$
command[users]=/usr/libexec/nagios/check_users -w $ARG1$ -c $ARG2$
command[swap]=/usr/libexec/nagios/check_swap -w $ARG1$ -c $ARG2$
command[disk]=/usr/libexec/nagios/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$ ?m
command[procs_zombie]=/usr/libexec/nagios/check_procs -w $ARG1$ -c $ARG2$ -s Z
command[procs_total]=/usr/libexec/nagios/check_procs -w $ARG1$ -c $ARG2$
command[procs_name]=/usr/libexec/nagios/check_procs -w $ARG1$ -c $ARG2$ -C $ARG3$

Restart NRPE to load new settings

sudo /etc/rc.d/init.d/nrpe restart

Make NRPE start at boot by linking it to run-level 2

cd /etc/rc.d/rc2.d/
ln -s ../init.d/nrpe S99nrpe

Host can now be added to OP5 Monitor and be monitored with check_nrpe service-checks.