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Difference between revisions of "Nagios"
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Added "Ubuntu Software Updates Monitor"
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== Create Services == | === Create Services === | ||
Services are used to define a generic check command within the bounds of a specific service. So for example, you could define two separate disk space checks, using the same command definition, but with different alerting thresholds depending on your requirements. | Services are used to define a generic check command within the bounds of a specific service. So for example, you could define two separate disk space checks, using the same command definition, but with different alerting thresholds depending on your requirements. | ||
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== Create Hostgroup == | === Create Hostgroup === | ||
The hostgroup definition allows you to group one or more hosts together, in order to have service checks run against them. So in the above I created services that would apply to hosts in the <code>qnap-nas</code> hostgroup. I can then add my NAS server to this hostgroup in order for it to be monitored (hostgroup definitions are normally found in <code>/etc/nagios3/conf.d/hostgroups_nagios2.cfg</code> | The hostgroup definition allows you to group one or more hosts together, in order to have service checks run against them. So in the above I created services that would apply to hosts in the <code>qnap-nas</code> hostgroup. I can then add my NAS server to this hostgroup in order for it to be monitored (hostgroup definitions are normally found in <code>/etc/nagios3/conf.d/hostgroups_nagios2.cfg</code> | ||
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address 192.168.1.200 | address 192.168.1.200 | ||
} | } | ||
== Ubuntu Software Updates Monitor == | |||
This check uses some scripts developed by Michal Ludvig, I've downloaded the scripts to my site, but the originals, complete with his supporting notes can be found here - http://www.logix.cz/michal/devel/nagios. Though note that I've updated the <code>check_snmp_extend.sh </code> script (didn't work for me, suspect Nagios file locations have changed since script was originally written), all kudos should still go to Michal. | |||
To summarise how it works... | |||
# Nagios uses a local script to SNMP query a remote server you want to check | |||
# The SNMP query triggers another script to be run on the remote server which queries whether there are any updates to install | |||
# The result is returned via SNMP to the calling script on the Nagios server, which in turn passes the data to Nagios | |||
To set it up... | |||
# '''On your Nagios server...''' | |||
## Download <code>check_snmp_exec.sh</code> to <code>/usr/lib/nagios/plugins </code> | |||
##* EG when in folder <code>/usr/lib/nagios/plugins</code> do <code> wget http://dl.sandfordit.com/scripts/check_snmp_extend.sh </code> | |||
## Make the the script executable | |||
##* EG <code> chmod +x check_snmp_extend.sh </code> | |||
## Define a command for the check in <code> /etc/nagios3/conf.d/commands.cfg </code> (see below - Nagios command) | |||
# '''On your monitored servers (do one 1st to test)...''' | |||
## Download <code>check-apt-upgrade.pl</code> to <code>/usr/local/bin/ </code> | |||
##* EG when in folder <code>/usr/local/bin/</code> do <code> wget http://dl.sandfordit.com/scripts/check-apt-upgrade.pl </code> | |||
## Make the the script executable | |||
##* EG <code> chmod +x check-apt-upgrade.pl </code> | |||
## Make the server's SNMP daemon aware of it, edit <code> /etc/snmp/snmpd.conf </code>, add the following | |||
##* <code> extend sw-updates /usr/local/bin/check-apt-upgrade.pl --run </code> | |||
## Restart the SNMP daemon | |||
##* <code> service snmpd restart </code> | |||
# '''Back on the Nagios server...''' | |||
## Define a service for the check in <code> /etc/nagios3/conf.d/services_nagios2.cfg </code> (see below - Nagios service) | |||
## Check your Nagios config is valid | |||
##* <code> nagios3 -v /etc/nagios3/nagios.cfg </code> | |||
## Restart Nagios | |||
##* <code> service nagios3 restart </code> | |||
* nagios command... | |||
define command{ | |||
command_name check_snmp_extend | |||
command_line /usr/lib/nagios/plugins/check_snmp_extend.sh $HOSTADDRESS$ $ARG1$ | |||
} | |||
* nagios service... | |||
# SNMP check for Ubuntu server package updates | |||
define service { | |||
hostgroup_name ubuntu-servers | |||
service_description Updates SNMP | |||
check_command check_snmp_extend!sw-updates | |||
use generic-service | |||
notification_interval 0 ; set > 0 if you want to be renotified | |||
} | |||
[[Category:Nagios]] | [[Category:Nagios]] | ||
[[Category:Ubuntu]] | |||
[[Category:SNMP]] | [[Category:SNMP]] | ||
[[Category:QNAP]] | [[Category:QNAP]] | ||