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contrib-munin/plugins/pdns/pdns_rel

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#!/bin/bash
#
# Script to monitor PowerDNS performance
#
# Parameters understood:
#
# config (required)
# autoconf (optional - used by munin-config)
#%# family=auto
#%# capabilities=autoconf
pdns_control="/usr/bin/pdns_control"
command="$pdns_control show"
state_file=$MUNIN_PLUGSTATE/pdns_rel.state
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if [ "$1" = "autoconf" ]; then
if [ -e "$pdns_control" ]; then
echo yes
exit 0
else
echo "no (missing $pdns_control)"
exit 0
fi
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fi
if [ "$1" = "config" ]; then
echo 'graph_title Power DNS Packet Cache Performance'
echo 'graph_args -l 0 --upper-limit 100 --base 1000'
echo 'graph_vlabel %'
echo 'graph_category dns'
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echo 'graph_info This graph shows the Power DNS packet cache performance on the machine.'
echo 'packetcache_hitrate.label packet cache hitrate'
echo 'packetcache_hitrate.type GAUGE'
echo 'packetcache_hitrate.min 0'
echo 'packetcache_hitrate.max 100'
echo 'packetcache_hitrate.info Hits on the packets cache'
exit 0
fi
hits=$($command packetcache-hit)
queries=$($command udp-queries)
if [ -f "$state_file" ]; then
old_hits=$(head -n1 "$state_file")
old_queries=$(tail -n1 "$state_file")
fi
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if [ -f "$state_file" ] && [ "$(stat --format=%Y "$state_file")" -gt "$(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 $(( d_hits * 100 / d_queries ))
fi
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fi
echo "$hits" > "$state_file"
echo "$queries" >> "$state_file"