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99 lines
2.6 KiB
Bash
Executable File
99 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# -*- sh -*-
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: << =cut
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=head1 NAME
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dm_cache_occupancy_ - Wildcard-plugin to dm-cache occupancy.
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=head1 CONFIGURATION
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This plugin does not normally require configuration.
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The plugin may need to run as root to determine dm-cache status.
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This is configured like this:
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[dm_cache_*]
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user root
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This is a wildcard plugin. To monitor a cached device-mapper volume,
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link volume to this file. For example,
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ln -s /usr/share/munin/plugins/dm_cache_occupancy_ \
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/etc/munin/plugins/dm_cache_occupancy_vg_1122____lv_home
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will monitor vg_1122-lv_home.
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Please note that ____ (4 underscores) is replaced by - (dash) symbol.
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This is workaround for http://munin-monitoring.org/ticket/1236
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Cached volumes found in dmsetup status can be monitored.
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=head1 AUTHOR
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Original idea: Steinar H. Gunderson <sgunderson@bigfoot.com>
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Found in Google by keywords "munin dm-cache"
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Copyright (C) 2014 Vladimir Stackov <amigo.elite@gmail.com>
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=head1 LICENSE
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GPLv2
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf suggest
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=cut
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CVOL=${0##*dm_cache_occupancy_}
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#workaround for http://munin-monitoring.org/ticket/1236
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CVOL=${CVOL/____/-}
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case $1 in
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autoconf)
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env dmsetup status > /dev/null 2>&1
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if [[ $? -eq 0 ]]; then
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echo yes
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exit 0
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else
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echo "no (env dmsetup returned value > 0)"
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exit 0
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fi
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;;
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suggest)
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dmsetup status | grep ' cache ' | awk -F: '{print $1}'
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exit $?
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;;
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config)
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echo "graph_title $CVOL dm-cache cache occupancy"
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echo 'graph_args --base 1000'
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echo 'graph_vlabel blocks'
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echo 'graph_category disk'
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echo "graph_info This graph shows the dm-cache cache occupancy of the $CVOL cached volume."
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echo 'cache_used_metadata.label Used metadata'
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echo 'cache_used_metadata.info Used metadata blocks for cache'
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echo 'cache_total_metadata.label Total metadata'
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echo 'cache_total_metadata.info Total metadata blocks for cache'
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echo 'cache_used_blocks.label Used blocks'
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echo 'cache_used_blocks.info Used blocks in cache for cache'
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echo 'cache_total_blocks.label Total blocks'
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echo 'cache_total_blocks.info Total blocks in cache for cache'
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echo 'cache_dirty.label Dirty blocks'
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echo 'cache_dirty.info Dirty blocks for cache'
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exit 0
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;;
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esac
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dmstatus=$(dmsetup status $CVOL)
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echo "cache_used_metadata.value $(echo $dmstatus | awk '{print $5}' | awk -F/ '{print $1}')"
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echo "cache_total_metadata.value $(echo $dmstatus | awk '{print $5}' | awk -F/ '{print $2}')"
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echo "cache_used_blocks.value $(echo $dmstatus | awk '{print $7}' | awk -F/ '{print $1}')"
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echo "cache_total_blocks.value $(echo $dmstatus | awk '{print $7}' | awk -F/ '{print $2}')"
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echo "cache_dirty.value $(echo $dmstatus | awk '{print $14}')"
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