check_zfs.sh
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#!/bin/bash
function smart_disks() {
if [[ $# != 1 ]]; then
echo "Wrong number of arguments"
return 3
fi
POOL=$1
DISKS=$(zpool status -P $POOL | sed -E 's/\t/ /g' | sed -E 's/[ ]+/ /g' | sed -E 's/^ //g' | grep "^/dev" | cut -d' ' -f 1)
ERR_OUTPUT=""
HIGHEST_RES=0
for disk in $DISKS; do
OUTPUT=""
RES=0
if echo $disk | grep "nvme" > /dev/null; then
OUTPUT=$(/usr/lib64/nagios/plugins/check_nvme $disk)
RES=$?
else
OUTPUT=$(/usr/lib64/nagios/plugins/check_smart $disk)
RES=$?
fi
if [[ $RES != 0 ]]; then
ERR_OUTPUT="$ERR_OUTPUT - $OUTPUT"
fi
if [[ $RES -gt $HIGHEST_RES ]]; then
HIGHEST_RES=$RES
fi
done
echo -n "ZFS POOL SMART $POOL "
if [[ $HIGHEST_RES == 1 ]]; then
echo "WARNING${ERR_OUTPUT}"
return 1
elif [[ $HIGHEST_RES == 2 ]]; then
echo "CRITICAL${ERR_OUTPUT}"
return 2
elif [[ $HIGHEST_RES == 3 ]]; then
echo "UNKNOWN${ERR_OUTPUT}"
return 3
fi
echo "OK"
return 0
}
function pool_errors() {
if [[ $# != 1 ]]; then
echo "Wrong number of arguments"
return 3
fi
OUTPUT="$(zpool status $1)"
if [[ $? != 0 ]]; then
return 3
fi
STATUS=$(echo "$OUTPUT" | grep -P "^\s*state:" | sed 's/ //g' | grep -P "^\s*state" | cut -d ':' -f 2)
if [[ $? != 0 ]]; then
return 3
fi
ERRORS=$(echo "$OUTPUT" | grep -P "^errors:")
if [[ $? != 0 ]]; then
return 3
fi
if [[ $STATUS != "ONLINE" ]]; then
echo "ZFS POOL ERRORS $1 - CRITICAL: status: $STATUS"
return 2
fi
if [[ $ERRORS != "errors: No known data errors" ]]; then
echo "ZFS POOL ERRORS $1 - WARNING: $ERRORS"
return 1
fi
echo "ZFS POOL ERRORS $1 - OK"
return 0
}
function pool_free() {
if [[ $# != 7 ]]; then
echo "Wrong number of arguments"
return 3
fi
POOL=$3
FREE_RAW=$(zfs list -po available $POOL | tail -n 1)
if [[ $? != 0 ]]; then
return 3
fi
USED_RAW=$(zfs list -po used $POOL | tail -n 1)
if [[ $? != 0 ]]; then
return 3
fi
TOTAL_RAW=$((USED_RAW + FREE_RAW))
TOTAL=$(echo "scale=2; $TOTAL_RAW / (1024^3)" | bc)
FREE=$(echo "scale=2; $FREE_RAW / (1024^3)" | bc)
PERC_FREE=$(echo "scale=2; 100*$FREE_RAW/$TOTAL_RAW" | bc)
CRITICAL="0"
WARNING="0"
TEMP=$(getopt -o c:w: -- "$@")
eval set -- "$TEMP"
for opt; do
case "$opt" in
-c) CRITICAL=$2; shift 2 ;;
-w) WARNING=$2; shift 2 ;;
esac
done
if [[ $CRITICAL == "0" || $WARNING == "0" ]]; then
echo "Missing -c or -w arguments"
return 3
fi
if [[ $(echo "$PERC_FREE < $CRITICAL" | bc) == 1 ]]; then
echo "ZFS POOL FREE $POOL - CRITICAL: ${PERC_FREE}% ${FREE}/${TOTAL} GB"
return 2
elif [[ $(echo "$PERC_FREE < $WARNING" | bc) == 1 ]]; then
echo "ZFS POOL FREE $POOL - WARNING: ${PERC_FREE}% ${FREE}/${TOTAL} GB"
return 2
fi
echo "ZFS POOL FREE $POOL - OK: ${PERC_FREE}% ${FREE}/${TOTAL} GB"
return 0
}
if [[ $# -lt 2 ]]; then
echo "Wrong number of arguments"
exit 3
fi
ACTION=$1
POOL=$2
if [[ $ACTION == "smart" ]]; then
smart_disks $POOL
exit $?
elif [[ $ACTION == "errors" ]]; then
pool_errors $POOL
exit $?
elif [[ $ACTION == "free" ]]; then
pool_free $POOL $@
exit $?
fi
echo "Unknown command: $ACTION"
exit 3