check_dnsext

NAME check_dnsext - nagios plugin to check dns queries DESCRIPTION Nagios plugin to check the dns resolution of hostnames. As opposed to the official nagios plugin check_dns, this plugin allows to specify types of dns resource records, like SRV, MX, TXT. VERSION This documentation refers to version 0.0.2 USAGE check_dnsext -H hostname -a expected_addres [-t type -s server -v] REQUIRED ARGUMENTS -H | --host hostname (simple or fully qualified) or ip address that we want to check. This can also be a domain name (TLD) if checking a SOA, NS, MX resource record. -a | --expected-address Expected outcome of the dns query. If we expect a multi valued outcome, then use a comma to separate them. For example: --expected-address=host.domain.tld,host2.domain.tld,host3.domain.tld,.. OPTIONS -H | --host hostname (simple or fully qualified) or ip address that we want to check. This can also be a domain name (TLD) if checking a SOA, NS, MX resource record. -a | --expected-address Expected outcome of the dns query. If we expect a multi valued outcome, then use a comma to separate them. For example: --expected-address=host.domain.tld,host2.domain.tld,host3.domain.tld,.. -s | --server dns server we want to use. If not specified, the default dns resolver of the system will be used. -t | --type type of dns resource record we want to query. If not specified, this defaults to an A record. -v | --verbose extra debugging info. Valid values are 0 (standard, no need to set it explicitely) or 1. -h | -? | --help this text CONFIGURATION AND ENVIRONMENT To use it in Nagios copy this file to your plugins folder (usually in /usr/local/nagios/libexec/ ). Make it executable for the nagios user. DEPENDENCIES This plugin requires the Net::DNS and the Array::Compare Perl modules. If you use a Redhat based linux distribution, you can install Net::DNS so: # yum install perl-Net-DNS The Array::Compare module is unfortunately not packaged in any of the usual yum repositories but building a spec file and creating a rpm package is for this one very straight forward. Dave Cross wrote a nice presentation showing how to achieve this: Perl in RPM-Land. You can read it in http://www.slideshare.net/davorg/perl-in-rpmland-presentation If you use a debian based linux distribution, the modules are called libnet-dns-perl and libarray-compare-perl: # apt-get install libnet-dns-perl # apt-get install libarray-compare-perl If you use another system, you should probably have to use the cpan shell to install them. You could use perlbrew or cpanminus as well. AUTHOR Natxo Asenjo (nasenjo@asenjo.nl_removethis_) LICENCE AND COPYRIGHT This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perldoc perlartistic. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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