check_zpool.sh

#! /usr/bin/env bash
# Check zpool status - tested on ZFS-on-Linux
# James Fraser <fwaggle@fwaggle.org>

ZPOOL=$1
ZSTATUS=$(zpool status $ZPOOL)
if [ "$?" != "0" ]
then
	echo "CRITICAL"
	exit 2
fi

STATUS='UNKNOWN'
ERRORS=$(echo "$ZSTATUS" | grep 'sd[a-z]' | awk 'BEGIN {}; { rd+=$3; wr+=$4; ck+=$5; } END { printf "%s %s %s\n", rd, wr, ck }')
STATE=$(echo "$ZSTATUS" | grep 'state:' | awk '{ print $2; }')

# Everything is normal.
if [ "$STATUS" == "UNKNOWN" -a "$STATE" == 'ONLINE' -a "$ERRORS" == "0 0 0" ]
then
	STATUS='OK'
fi

if [ "$ERRORS" != "0 0 0" ]
then
	STATUS='WARNING'
fi

if [ "$STATE" == 'FAULTED' -o "$STATE" == 'DEGRADED' -o "$STATE" == 'UNAVAIL' ]
then
	STATUS='CRITICAL'
fi

echo "${STATUS} - Zpool is ${STATE}|${ERRORS}"
echo "$ZSTATUS"

# Set return codes for Nagios/Icinga.
if [ "$STATUS" == 'CRITICAL' ]; then exit 2; fi
if [ "$STATUS" == 'WARNING' ]; then exit 1; fi
if [ "$STATUS" == 'OK' ]; then exit 0; fi
exit 3