132 lines
3 KiB
Bash
132 lines
3 KiB
Bash
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#!/bin/sh
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# Little check for device errors on Btrfs volumes
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#
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# GPL v3+ (copyright chl-dev@bugness.org)
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PROGPATH=$( echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,' )
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REVISION="0.1"
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# Stop at the first non-catched error
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set -e
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# Include check_range()
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# Not needed at the moment
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#. $PROGPATH/utils.sh
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STATE_OK=0
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STATE_WARNING=1
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STATE_CRITICAL=2
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STATE_UNKNOWN=3
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STATE_DEPENDENT=4
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# Default values
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WARNING_STATS=0
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CRITICAL_STATS=0
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# Output
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OUTPUT_EXIT_STATUS=$STATE_OK
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OUTPUT_DETAIL_OK=""
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OUTPUT_DETAIL_WARNING=""
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OUTPUT_DETAIL_CRITICAL=""
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OUTPUT_PERFDATA=""
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NB_DEVICES=0
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#
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# Help function
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#
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usage() {
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cat <<EOF
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Usage :
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$0 -V volume -V...
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Example :
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./check_btrfs.sh -V /home
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EOF
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}
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check_range_syntax() {
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return 0
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}
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# check_range 0 "$1" >/dev/null 2>&1
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# if [ "$?" -eq "2" ]; then
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# return 1
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# Some early checks
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if ! which btrfs 2>&1 >/dev/null; then
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echo "UNKNOWN 'btrfs' command not found."
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exit $STATE_UNKNOWN
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fi
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#
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# Loop on parameters + tests
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#
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while getopts hw:c:V: f; do
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case "$f" in
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'h')
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usage
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exit
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;;
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'V')
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VOLUME="$OPTARG"
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# Quickly check if we have enough permission to launch btrfs commands
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if ! btrfs device stats "$VOLUME" >/dev/null 2>&1 ; then
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echo "UNKNOWN: unable to launch 'btrfs device stats $VOLUME' command (permissions ?)."
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exit $STATE_UNKNOWN
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fi
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# For information, add the number of devices to the perfdata
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NB_DEVICES="$(( $NB_DEVICES + $( btrfs fi show --raw "$VOLUME" | sed -n 's/^[[:space:]]*Total devices \([0-9]\+\) .*/\1/p' ) ))"
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# Check the device stats
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# (the kinda weird <<EOF at the end is to avoid entering a sub-shell, so we can access
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# our precious vars' content outside of the loop, even with prosix-strict dash)
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while read ITEM VALUE; do
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# Add the value to the perfdata
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OUTPUT_PERFDATA="$( printf "%s\n'%s'=%d;%d;%d;0;" "$OUTPUT_PERFDATA" "$ITEM" "$VALUE" "$WARNING_STATS" "$CRITICAL_STATS" )"
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# Check if the value is within ok/warn/critical ranges
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if [ "$VALUE" -gt "$CRITICAL_STATS" ]; then
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OUTPUT_EXIT_STATUS=$STATE_CRITICAL
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OUTPUT_DETAIL_CRITICAL="$OUTPUT_DETAIL_CRITICAL $ITEM:$VALUE"
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elif [ "$VALUE" -gt "$WARNING_STATS" ] && [ "$OUTPUT_EXIT_STATUS" != "$STATE_CRITICAL" ]; then
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OUTPUT_EXIT_STATUS=$STATE_WARNING
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OUTPUT_DETAIL_WARNING="$OUTPUT_DETAIL_WARNING $ITEM:$VALUE"
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fi
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done <<EOF
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$( btrfs device stats "$VOLUME" )
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EOF
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;;
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\?)
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usage
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exit 1
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;;
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esac
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done
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# Insert nb devices data into output
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OUTPUT_PERFDATA="$( printf "%s\n%s" "$OUTPUT_PERFDATA" "'nb_devices_total'=$NB_DEVICES;;;1;" )"
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OUTPUT_DETAIL_OK="$OUTPUT_DETAIL_OK - $NB_DEVICES $( [ "$NB_DEVICES" -eq 1 ] && echo "device" || echo "devices" )"
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case "$OUTPUT_EXIT_STATUS" in
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'0')
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printf "OK%s" "$OUTPUT_DETAIL_OK"
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;;
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'1')
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printf "WARNING%s" "$OUTPUT_DETAIL_WARNING"
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;;
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'2')
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printf "CRITICAL%s" "$OUTPUT_DETAIL_CRITICAL"
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;;
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*)
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printf "UNKNOWN"
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;;
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esac
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# We sort the perfdata because of a weird bug in some icinga/pnp4nagios interactions
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printf "|%s\n" "$( printf "%s" "$OUTPUT_PERFDATA" | sort | grep -v "^$" | tr "\n" " " )"
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exit $OUTPUT_EXIT_STATUS
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