check_bind.sh

Description
check_bind.sh is a Nagios plugin to check the bind daemon whether it's running via its pid file and then gets the statistics via rndc stats. The user that run the script needs the ability to 'sudo rndc stats'! The timeframe in which the rndc stats output is updated is controlled by the check interval. The output shows amount of requests of various types occured during the last check interval. The script itself is written sh-compliant and free software under the terms of the GPLv2 (or later).

BIND9 versions 9.3 and 9.5 or greater are now supported as well. I didn't have the time yet to do more testing. It works for me under Gentoo with BIND 9.4 and 9.6 and under Debian Lenny with BIND 9.5 as well. If something doesn't work, please contact me via mike@matejunkie.com or via a blog comment at [http://www.matejunkie.com/]. Thanks in advance.
I finally solved the mawk/gawk problem with a little help from a user of this plugin. It should run now with either gawk or mawk without any problems.

-h/--help Output
check_bind.sh -p/--path_pid /var/run/named -n/--name_pid named.pid -r/--path-rndc /usr/sbin -s/--path-stats /var/bind -V/--bind-version 9.3/9.4/9.5 -N

Options:
-p/--path-pid)
Path where the pid file for bind is stored. You might need to alter this to your distribution's way of dealing with pid files. Default is: /var/run/named
-n/--name_pid)
Name of the pid file. Default is: named.pid
-r/--path-rndc)
Path where the rndc binary is located. Default is: /usr/sbin
-s/--path-stats)
Path where the named.stats file is stored. Default is: /var/bind
-t/--path-tmp)
Path where the temporary named.stats excerpt is being stored. Default is: /tmp
-V/--bind-version)
Specifies the bind version you're running. Currently there's BIND 9.3, 9.4 and 9.5 supported. Default is: 9.4
-N/--no-pid-check)
If you don't want that the script checks for the pid file, use this option. Default is: off

Output example
user@host ~ $ ./check_bind.sh
Bind9 is running. 640 successfull requests, 0 referrals, 3 nxdomains since last check. | 'success'=640 'referral'=0 'nxrrset'=236 'nxdomain'=3 'recursion'=1 'failure'=0 'duplicate'=0 'dropped'=0

Changelog
* 2009-05-20
* Bugfix for more awk compliance
* 2009-05-14
* Small bugfix for two exit codes
* 2009-05-03
* The plugin now supports BIND versions 9.3 and 9.5+.
* The named.stats file is now initially parsed via awk and the excerpts are being copied to a temp directory for further use instead of frequently tail'ing the named.stats
* The temporary directory is configurable via -t/--path-tmp as well
* The path to the rndc binary is now configurable via -r/--path-rndc
* You're now able to deactivate the pid check via -N/--no-pid-check

* 2009-04-06
* Did some slight debugging on the option parsing. The -s/--path-stats option was missing. Should be working now just fine.