Nagios - Add monitoring Target#22011/06/12

	This example shows to add monitoring target with installing nrpe agent and monitor services on targets.
[1]	Install nrpe agent and plugins for monitoring on target host.

[root@node01 ~]#

yum --enablerepo=epel -y install nrpe nagios-plugins-all

# install from EPEL

[root@node01 ~]#

vi /etc/nagios/nrpe.cfg

# line 79: add Nagios server's IP address

allowed_hosts=127.0.0.1

,10.0.0.100

# line 200: change the line for disk check like follows

# replace to the one for your own environment

command[

check_lv_root

]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p

/dev/mapper/VolGroup-lv_root

[root@node01 ~]#

/etc/rc.d/init.d/nrpe start

Starting nrpe:

[ OK ]

[root@node01 ~]#

chkconfig nrpe on

[2]	Install nrpe plugin on Nagios server.

[root@master ~]#

yum --enablerepo=epel -y install nagios-plugins-nrpe

# install from EPEL

[root@master ~]#

vi /etc/nagios/objects/commands.cfg

# add at the last line

define command{
    command_name            check_nrpe
    command_line            $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

[root@master ~]#

vi /etc/nagios/servers/node01.cfg

# add at the last line

# change the line of disk check line for your environment

define service{
    use                     generic-service
    host_name               node01
    service_description     Current Users
    check_command           check_nrpe!check_users
}
define service{
    use                     generic-service
    host_name               node01
    service_description     Current Load
    check_command           check_nrpe!check_load
}
define service{
    use                     generic-service
    host_name               node01
    service_description     Root Partition
    check_command           check_nrpe!check_lv_root
}
define service{
    use                     generic-service
    host_name               node01
    service_description     Zombie Processes
    check_command           check_nrpe!check_zombie_procs
}
define service{
    use                     generic-service
    host_name               node01
    service_description     Total Processes
    check_command           check_nrpe!check_total_procs
}

[root@master ~]#

/etc/rc.d/init.d/nagios restart

Running configuration check...done.
Stopping nagios: .done.
Starting nagios: done.

[3]	Access to Nagios admin site and make sure services on target hosts would be added.

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