Install Icinga / Nagios NRPE plugin

# on Icinga / Nagios client
apt-get install -y nagios-nrpe-server
sed -i 's|allowed_hosts=127.0.0.1|allowed_hosts=192.168.1.197|g' /etc/nagios/nrpe.cfg
/etc/init.d/nagios-nrpe-server restart

cat < /etc/nagios/nrpe.d/my.cfg
command[check_root]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /
command[check_http]=/usr/lib/nagios/plugins/check_http -H localhost
command[check_ssh]=/usr/lib/nagios/plugins/check_ssh localhost
EOF

/etc/init.d/nagios-nrpe-server restart

# test access
/usr/lib/nagios/plugins/check_nrpe -H

# on Icinga / Nagios server
apt-get --no-install-recommends install nagios-nrpe-plugin

cat < /etc/icinga/objects/client1.cfg
define host {
host_name client1
alias client1 DomU
address 192.168.1.222
use generic-host
}

define service {
use generic-service
host_name client1
service_description check_users
check_command check_nrpe_1arg!check_users
}

define service {
use generic-service
host_name client1
service_description check_load
check_command check_nrpe_1arg!check_load
}

define service {
use generic-service
host_name client1
service_description check_root
check_command check_nrpe_1arg!check_root
}

define service {
use generic-service
host_name client1
service_description check_zombie_procs
check_command check_nrpe_1arg!check_zombie_procs
}

define service {
use generic-service
host_name client1
service_description check_total_procs
check_command check_nrpe_1arg!check_total_procs
}

define service {
use generic-service
host_name client1
service_description check_http
check_command check_nrpe_1arg!check_http
}

define service {
use generic-service
host_name client1
service_description check_ssh
check_command check_nrpe_1arg!check_ssh
}
EOF