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contrib-munin/plugins/disk/dm_cache_occupancy_
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_occupancy_ - Wildcard-plugin to dm-cache occupancy.
=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_occupancy_ \
/etc/munin/plugins/dm_cache_occupancy_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=${0##*dm_cache_occupancy_}
#workaround for http://munin-monitoring.org/ticket/1236
CVOL=${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 occupancy"
echo 'graph_args --base 1000'
echo 'graph_vlabel blocks'
echo 'graph_category disk'
echo "graph_info This graph shows the dm-cache cache occupancy of the $CVOL cached volume."
echo 'cache_used_metadata.label Used metadata'
echo 'cache_used_metadata.info Used metadata blocks for cache'
echo 'cache_total_metadata.label Total metadata'
echo 'cache_total_metadata.info Total metadata blocks for cache'
echo 'cache_used_blocks.label Used blocks'
echo 'cache_used_blocks.info Used blocks in cache for cache'
echo 'cache_total_blocks.label Total blocks'
echo 'cache_total_blocks.info Total blocks in cache for cache'
echo 'cache_dirty.label Dirty blocks'
echo 'cache_dirty.info Dirty blocks for cache'
exit 0
;;
esac
dmstatus=$(dmsetup status $CVOL)
echo "cache_used_metadata.value $(echo $dmstatus | awk '{print $5}' | awk -F/ '{print $1}')"
echo "cache_total_metadata.value $(echo $dmstatus | awk '{print $5}' | awk -F/ '{print $2}')"
echo "cache_used_blocks.value $(echo $dmstatus | awk '{print $7}' | awk -F/ '{print $1}')"
echo "cache_total_blocks.value $(echo $dmstatus | awk '{print $7}' | awk -F/ '{print $2}')"
echo "cache_dirty.value $(echo $dmstatus | awk '{print $14}')"