Munin contributed plugins

#!/bin/bash

#

# Plugin to monitor Bind9 Name Server Resolver Stats

#

# Author:

#    Dave Fennell <dave@microtux.co.uk>

#

# Created:

#    20th December 2012

#

# License:

#    GPL-2

#

# Usage:

#    Place in /etc/munin/plugins/ (or link it there using ln -s)

#

# change those to reflect your bind configuration (use plugin configuration)

# stat file

if [ "$stat_file" = "" ]; then

	stat_file="/var/cache/bind/named.stats"

fi

# rndc path

if [ "$rndc" = "" ]; then

	rndc="/usr/sbin/rndc"

fi

# Blank the stats file (else stats are appended not replaced)

rm ${stat_file}

# Ask to bind to build new one

${rndc} stats

# The section we are looking for in the stats.

section="Resolver Statistics"

# Get all the lines in the section:

# - cat the file

# - use sed to get lines after (and excluding) the section start tag

# - use sed to get lines up to (and excluding) the next section start tag

# - use grep to remove any lines starting with a [

cmd='cat "/var/cache/bind/named.stats" | sed "0,/^\+\+ '${section}' \+\+/d" | sed -e "/^\+\+/,\$d" | grep -v "^\["'

# Config mode.

if [ "$1" = "config" ]; then

	echo 'graph_args --lower-limit 0'

	echo 'graph_category dns'

	echo 'graph_info '${section}' for the Bind9 Name Server'

	echo 'graph_scale no'

	echo 'graph_title Bind9 '${section}

	echo 'graph_vlabel requests/${graph_period}'

	# Output the stat configs.

	eval ${cmd} | while read num name

	do

		# Shorten some names.

		label=${name//queries with /}

		label=${label//</below}

		label=${label//>/above}

		# All lowercase.

		label=$(echo "$label" | tr 'A-Z' 'a-z')

		# Now change names to all have no spaces.

		key=${label//[ -]/_}

		echo ${key}.label ${label}

		echo ${key}.info ${name}

		echo ${key}.type COUNTER

	done

	# If dirty config capability is enabled then fall through

	# to output the data with the config information.

	if [ "$MUNIN_CAP_DIRTYCONFIG" = "" ]; then

		exit 0

	fi

fi

# Output the stats.

eval ${cmd} | while read num name

do

	# Shorten some names.

	label=${name//queries with /}

	label=${label//</below}

	label=${label//>/above}

	# All lowercase.

	label=$(echo "$label" | tr 'A-Z' 'a-z')

	# Now change names to all have no spaces.

	key=${label//[ -]/_}

	echo ${key}.value ${num}

done