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contrib-munin/plugins/disk/dm_cache_statistics_
Am1GO 69e8811972 Fixed type in dm-cache
s/voulme/volume
2014-11-23 21:08:33 +03:00

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#!/bin/bash
# -*- sh -*-
: << =cut
=head1 NAME
dm_cache_statistics_ - Wildcard-plugin to dm-cache statistics.
=head1 CONFIGURATION
This plugin does not normally require configuration.
The plugin may need to run as root to determine dm-cache status.
This is configured like this:
[dm_cache_*]
user root
This is a wildcard plugin. To monitor a cached device-mapper volume,
link volume to this file. For example,
ln -s /usr/share/munin/plugins/dm_cache_statistics_ \
/etc/munin/plugins/dm_cache_statistics_vg_1122____lv_home
will monitor vg_1122-lv_home.
Please note that ____ (4 underscores) is replaced by - (dash) symbol.
This is workaround for http://munin-monitoring.org/ticket/1236
Cached volumes found in dmsetup status can be monitored.
=head1 AUTHOR
Original idea: Steinar H. Gunderson <sgunderson@bigfoot.com>
Found in Google by keywords "munin dm-cache"
Copyright (C) 2014 Vladimir Stackov <amigo.elite@gmail.com>
=head1 LICENSE
GPLv2
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf suggest
=cut
CVOL=${0##*dm_cache_statistics_}
#workaround for http://munin-monitoring.org/ticket/1236
CVOL=${CVOL/____/-}
case $1 in
autoconf)
env dmsetup status > /dev/null 2>&1
if [[ $? -eq 0 ]]; then
echo yes
exit 0
else
echo "no (env dmsetup returned value > 0)"
exit 0
fi
;;
suggest)
dmsetup status | grep ' cache ' | awk -F: '{print $1}'
exit $?
;;
config)
echo "graph_title $CVOL dm-cache cache statistics"
echo 'graph_args --base 1000'
echo 'graph_vlabel blocks/sec'
echo 'graph_category disk'
echo "graph_info This graph shows the dm-cache cache statistics of the $CVOL cached volume."
echo 'cache_read_hits.type DERIVE'
echo 'cache_read_hits.label Read hits'
echo 'cache_read_hits.info Read hits for cache'
echo 'cache_read_misses.type DERIVE'
echo 'cache_read_misses.label Read misses'
echo 'cache_read_misses.info Read misses for cache'
echo 'cache_write_hits.type DERIVE'
echo 'cache_write_hits.label Write hits'
echo 'cache_write_hits.info Write hits for cache'
echo 'cache_write_misses.type DERIVE'
echo 'cache_write_misses.label Write misses'
echo 'cache_write_misses.info Write misses for cache'
echo 'cache_demotions.type DERIVE'
echo 'cache_demotions.label Demotions'
echo 'cache_demotions.info Demotions for cache'
echo 'cache_promotions.type DERIVE'
echo 'cache_promotions.label Promotions'
echo 'cache_promotions.info Promotions for cache'
exit 0
;;
esac
dmstatus=$(dmsetup status $CVOL)
echo "cache_read_hits.value $(echo $dmstatus | awk '{print $8}')"
echo "cache_read_misses.value $(echo $dmstatus | awk '{print $9}')"
echo "cache_write_hits.value $(echo $dmstatus | awk '{print $10}')"
echo "cache_write_misses.value $(echo $dmstatus | awk '{print $11}')"
echo "cache_demotions.value $(echo $dmstatus | awk '{print $12}')"
echo "cache_promotions.value $(echo $dmstatus | awk '{print $13}')"