Munin contributed plugins

#!/bin/bash

#

# Script to monitor PowerDNS performance

#

# Parameters understood:

#

#       config   (required)

#       autoconf (optional - used by munin-config)

#%# family=auto

#%# capabilities=autoconf

command="/etc/init.d/pdns show"

state_file=/var/lib/munin/plugin-state/pdns_rel.state

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

        echo yes

        exit 0

fi

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

        echo 'graph_title Power DNS Packet Cache Performance'

        echo 'graph_args -l 0 --upper-limit 100 --base 1000'

        echo 'graph_vlabel %'

        echo 'graph_category Power DNS'

        echo 'graph_info This graph shows the Power DNS packet cache performance on the machine.'

        echo 'packetcache_hitrate.label packet cache hitrate'

        echo 'packetcache_hitrate.type GAUGE'

        echo 'packetcache_hitrate.min 0'

        echo 'packetcache_hitrate.max 100'

        echo 'packetcache_hitrate.info Hits on the packets cache'

        exit 0

fi

hits=$($command packetcache-hit | awk -F= '{print $2}')

queries=$($command udp-queries | awk -F= '{print $2}')

old_hits=$(cat $state_file | head -n1)

old_queries=$(cat $state_file | tail -n1)

if [ -f $state_file ] && [ $(ls -l --time-style=+%s $state_file | awk '{print $6}') -gt $(date --date="7 minutes ago" +%s) ] ; then

	d_hits=$(($hits - $old_hits))

	d_queries=$(($queries - $old_queries))

	if [ $d_queries -gt 0 ] ; then

	   echo packetcache_hitrate.value $(( $d_hits * 100 / $d_queries ))

	fi

fi

echo $hits > $state_file

echo $queries >> $state_file