Passive Checks and NRDP
- Active Checks:
- Passive Checks:
Configure Passive Checks
- In the main nagios configuration (/usr/local/nagios/etc/nagios.cfg)
accept_passive_service_checks=1
accept_passive_host_checks=1
log_passive_checks=1
- In the host definition
define host {
use generic-host
host_name linuxmachine1
address 192.168.0.11
active_checks_enabled 0
passive_checks_enabled 1
}
- In the service definition
define service {
use local-service
host_name linuxmachine1
service_description diskspace
active_checks_enabled 0
passive_checks_enabled 1
}
- Refer Here
- Build a sample script around PROCESS_HOST_CHECK_RESULT to accept hostname, status code and output from check
#!/bin/bash
NOW=`date +%s`
HOST=$1
STATUS=$2
OUTPUT=$3
echo "[$NOW] PROCESS_HOST_CHECK_RESULT;$HOST;$STATUS;$OUTPUT \
> /var/nagios/rw/nagios.cmd
exit 0
Using NRDP
- NRDP is a technology for sending results to Nagios instance remotely. It provides simple API to send the results to Nagios Instance using HTTP Protocol
- NRDP consists of two parts
- Server: This part is responsible for receiving check results from remote hosts and passing them to nagios.
- Client: The client part getts to data be send as commandline arguments it sends it across to server.
- Refer Here
Monitoring Remote Hosts
-
For monitoring remote hosts
- SSH
- NRPE (Nagios Remote Plugin Executor)
-
NRPE is a client-server solution for running check commands on remote computers
-
NRPE uses TCP protocol with SSL encryption on top of it. Enabling encryption is optional.
-
NRPE communicates on 5666
-
NRPE Workflow
-
NRPE can be downloaded from Refer Here
-
Installation instructions are available over here
-
To configure nagios with your config directories refer image below
