Setting up NRPE daemon: Difference between revisions

From Alpine Linux
m (Cleanups for v1.10)
m (updated repo - nrpe is in main now)
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Source code: http://nagios.org/
Install daemon:
 
To install, add the edge testing repository(for 1.9. If using 1.10, then main 1.10 repo has nrpe), then run:
  apk add nrpe
  apk add nrpe
Set up config file to bind to local IP, only allow needed hosts to connect (in our case, our redundant Nagios servers).
Set up config file to bind to local IP, only allow needed hosts to connect.
Add a definition for a check command to /etc/nrpe.cfg, for example:
Add a definition for a check command to /etc/nrpe.cfg, for example:
  command[check_routes]=/usr/bin/check_routes.sh
  command[check_routes]=/usr/bin/check_routes.sh

Revision as of 23:14, 12 August 2010

Install daemon:

apk add nrpe

Set up config file to bind to local IP, only allow needed hosts to connect. Add a definition for a check command to /etc/nrpe.cfg, for example:

command[check_routes]=/usr/bin/check_routes.sh

Create the above script, and populate:

##!/bin/bash
##
## Script to check whether routes to branches are being received properly
NUMROUTES=`ip route | grep -n  | awk -F ':' '{print $1}' | tail -n 1`
if [[ $NUMROUTES > 80 ]];
then echo "OK: $NUMROUTES routes in routing table" && exit 0;
elif [[ $NUMROUTES < 80 ]] && [[ $NUMROUTES > 15 ]];
then echo "WARNING: $NUMROUTES routes in routing table" && exit 1;
elif $NUMROUTES = "" ;
then echo "WARNING: No routing information received" && exit 1;
else echo "CRITICAL: $NUMROUTES routes in routing table" && exit 2;
fi

Restart NRPE. Allow port 5666 through Shorewall (in /etc/shorewall/rules) through to monitoring hosts. On the monitoring host, run the following command to test:

root#/usr/local/nagios/libexec/check_nrpe -H 10.14.8.3 -p 5666 -c check_routes

You should get output like:

OK: 173 routes in routing table

If you are having trouble, enable debugging in /etc/nrpe.cfg, and check /var/log/messages for errors. Most likely error(s) has to do with permissions of what you are trying to execute.