====== ZFS Health Scripts ======

===== Checkpool =====
  * Check all pools and email operator if errors detected
<file bash check_pool.sh>
#!/bin/sh

RESULT="`zpool status | grep errors`"
ZPOOLSTATUS="`zpool status`"
HOSTNAME="`hostname`"
TMPFILE="/tmp/zfs_report"
#CHANGE ME
MAILTO="-@-"
#CHANGE ME
RESULT_GOOD="errors: No known data errors"

if [ "${RESULT}" = "${RESULT_GOOD}" ]
then
        echo "no errors"
        echo "no ZFS Errors on ${HOSTNAME}" > ${TMPFILE}
        echo "${ZPOOLSTATUS}" >> ${TMPFILE}
        #mail -s "ZFS pool Report" ${MAILTO} < ${TMPFILE}
else
        echo "errors detected"
        echo "no ZFS Errors on ${HOSTNAME}" > ${TMPFILE}
        echo "${ZPOOLSTATUS}" >> ${TMPFILE}
        mail -s "ERRORS DETECTED!!! ZFS pool Report" ${MAILTO} < ${TMPFILE}
fi
</file>

===== ZFS Scrub =====
  * Check to see if it's the weekend then scrub main pool
<file bash zfsScrubOnSat.sh>
#!/bin/sh

WEEKDAY="`date | cut -d " " -f1`"
POOL="tank"

if [ ${WEEKDAY} = "Sat" ]
then
        echo "It's Saturday Running Scrub"
        zpool scrub ${POOL}
else
        echo "It's not Saturday, exiting"
fi
</file>

===== ZFS Rep =====
<file bash zfs_rep.sh>
#!/bin/sh
 
pool="tank/vol2"
destination="zroot"
remote_pool="zroot/vol2"
host="10.1.0.61"
 
today=`date +"%Y-%m-%d"`
#yesterday=`date -v -1d +"$type%Y-%m-%d"`
yesterday="2017-01-07"
 
# create today snapshot
snapshot_today="${pool}@${today}"
# look for a snapshot with this name
if zfs list -H -o name -t snapshot | sort | grep "${snapshot_today}" > /dev/null; then
	echo " snapshot, ${snapshot_today}, already exists"
#	exit 1
else
	echo " taking todays snapshot, ${snapshot_today}"
	zfs snapshot -r ${snapshot_today}
fi
 
# look for yesterday snapshot
snapshot_yesterday="$pool@$yesterday"
snapshot_yesterday_r="$remote_pool@$yesterday"
snapshot_today_r="$remote_pool@${today}"

#echo $snapshot_yesterday
if  ssh root@$host "zfs list -H -o name -t filesystem | sort | grep \"${remote_pool}\"" > /dev/null; then
    echo " Pool found on remote"
else
    echo " Pool missing on remote, aborting"
    exit 1;
fi
if zfs list -H -o name -t snapshot | sort | grep "${snapshot_yesterday}" > /dev/null; then
	echo " yesterday snapshot, ${snapshot_yesterday}, exists locally"
	if ssh root@$host "zfs list -H -o name -t snapshot | sort | grep \"${snapshot_yesterday_r}\"" > /dev/null; then
		echo " yesterday snapshot, ${snapshot_yesterday_r}, exists on destination"
		if ssh root@$host "zfs list -H -o name -t snapshot | sort | grep \"${snapshot_today_r}\"" > /dev/null; then
            echo " Remote already has today's snapshot aborting sync"
            exit 2
		else
            echo " proceeding with incremental sync"
            zfs send -R -i ${snapshot_yesterday} ${snapshot_today} | ssh root@$host "zfs receive -Fduv ${destination}"
            echo " sync complete"
            exit 0;
        fi
	else
		echo " yesterday snapshot, ${snapshot_yesterday_r}, missing on destination"
		if ssh root@$host "zfs list -H -o name -t snapshot | sort | grep \"${snapshot_today_r}\"" > /dev/null; then
            echo " Remote already has today's snapshot aborting sync"
            exit 2
		else
            echo " proceeding with full sync"
            zfs send ${snapshot_today} | ssh root@$host "zfs receive -Fduv ${destination}"
            echo " sync complete"
            exit 0;
        fi
	fi
else
	echo " missing yesterday snapshot aborting, ${snapshot_yesterday}"
	exit 1
fi

</file>

===== ZFS Clean Snapshots =====
<file bash>
#!/bin/sh

pool="zroot/vol2"

# iterate i from 15 to 62
# any snapshot older than 2 weeks (14 days) or (15-62 days) old is deleted
for i in 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
do
        CLEANDATE=`date -v -${i}d +"$type%Y-%m-%d"`

        CLEAN_SNAP="${pool}@${CLEANDATE}"
        echo $CLEAN_SNAP
        if zfs list -H -o name -t snapshot | sort | grep "$CLEAN_SNAP" > /dev/null;
        then
                zfs destroy -r $CLEAN_SNAP
        fi
done
</file>