3rd-party Plugins

There are a variety of useful check plugins available asides from the stand Nagios plugin package. Most plug-ins can be found at NagiosExchange, a repository of plugins and addons.

Some of the specific plugins that are useful:

• check_cups_queue - check the size/status of a queue on a CUPS print server

• check_lpstat - check printers and print-queue length using lpstat
• check_rbl - check if the host is on any of the public email blacklists.
• check_ssl_certificate - check the expiration of an SSL certificate
• check_clamav - check that ClamAV signatures are up-to-date
• Apache web server plugins:
  • check_apachestatus.pl - A Nagios plugin that parses the status page of an apache server, the plugin returns the response time, the amount of idle, busy and open slots. The perfdata returns the status of all slots. Optionally you can specify how much slots should be available. See also Monitoring Apache Session load with Nagios through mod_status
  • check_apachestatus_auto.pl - parses the status page of an apache server, the plugin returns the response time, the amount of idle, busy, open and total slots. The perfdata returns the status of all slots including Requests/sec, Bytes/Request and Bytes/sec. Optionally you can specify how much slots should be available. Use http(s) and basic user authentication with non standard server-status urls.
  • check_apache2.sh - check the Apache's server status via the famous mod_status. Make sure, that you have permissions to access http://yourserver:port/server-status and that the Nagios User has the right to call 'ps ax' and 'ps -Ao pcpu,args', otherwise the script refuses to work.
• SNMP Interface check - Checks by snmp host interface state and usage.
  Requires that the Net::SNMP module for Perl is installed.
  cd /usr/local/nagios/libexec
wget http://nagios.manubulon.com/check_snmp_int.pl
chmod ugo+x check_snmp_int.pl