Red Hat ENTERPRISE LINUX 5.4 - SYSTEMTAP BEGINNERS GUIDE Technické informace stáhnout pdf (Strana 72)

58 System Analysis and Tuning Guide

5 Execute rcnagios restart and rcnsca restart.

Proceed as follows on the client you want to monitor:

Procedure3.3: Monitoring a Remote Host Resource with Nagios (client)

1 Install nagios-nsca-client on the host you want to monitor.

2 Write your test scripts (for example a script that checks the disk usage) like this:

#!/bin/bash

NAGIOS_SERVER=10.10.4.166

THIS_HOST=foobar

# Write own test algorithm here

# Execute On SUCCESS:

echo "$THIS_HOST;diskcheck;0;OK: test ok" \

| send_nsca -H $NAGIOS_SERVER -p 5667 -c /etc/nagios/

send_nsca.cfg -d ";"

# Execute On Warning:

echo "$THIS_HOST;diskcheck;1;Warning: test warning" \

| send_nsca -H $NAGIOS_SERVER -p 5667 -c /etc/nagios/

send_nsca.cfg -d ";"

# Execute On FAILURE:

echo "$THIS_HOST;diskcheck;2;CRITICAL: test critical" \

| send_nsca -H $NAGIOS_SERVER -p 5667 -c /etc/nagios/

send_nsca.cfg -d ";"

3 Insert a new cron entry with crontab -e. A typical cron entry could look like

this:

*/5 * * * * /directory/to/check/program/check_diskusage

3.5 Troubleshooting

Error: ABC 'XYZ' specified in ... '...' is not defined

anywhere!

Make sure that you have defined all necessary objects correctly. Be careful with

the spelling.

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Red Hat ENTERPRISE LINUX 5.4 - SYSTEMTAP BEGINNERS GUIDE Technické informace Strana 72