Nagios NRDP – Configuring Passive Checks
This following pages of this article explain how to set up the passive checks on the central Nagios server NAG-CENTRAL which will receive the host check results for NAG-REMOTE and also a service via send_nrdp.py.
To configure a passive host and check definition perform the following steps:
- Edit the nagios.cfg configuration file /usr/local/nagios/etc/nagios.cfg by executing the command below:
vi /usr/local/nagios/etc/nagios.cfg
- Find the object configuration file for localhost by searching for localhost.cfg
- Add a new line as shown below to add a new object configuration file named passive-hosts.cfg
cfg_file=/usr/local/nagios/etc/objects/passive-hosts.cfg
- Save and exit the file
- Create a new object configuration file named passive-hosts.cfg under /usr/local/nagios/etc/objects
vi /usr/local/nagios/etc/objects/passive-hosts.cfg
- Add the text below to define NAG-REMOTE
define host {
use passive-host
host_name NAG-REMOTE
alias NAG-Remote
address 10.100.100.200
hostgroups passive-hosts
}
- Add the text below to define a passive service check for CPU Usage on NAG-REMOTE
define service {
use passive_service_check
host_name NWO-REMOTE
service_description Current Load
check_command check_dummy!2!"No Passive Results Received"
contact_groups admins
notification_period 24x7
flap_detection_enabled 0
event_handler_enabled 0
notification_interval 1440
notification_period 24x7
}
- Save and exit the file
- Restart the nagios service by executing the command below:
systemctl restart nagios
- Go to the nagios web page http://NAG-CENTRAL/nagios and logon
- Check under Hosts and there will now be new host named NAG-REMOTE showing a status of UNKNOWN.