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@ryanburnette
Forked from petervanderdoes/zfs_health.sh
Last active April 6, 2021 20:31
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zfs health alerts in bash with mailgun api alert
#!/usr/bin/env bash
hostname=`hostname`
emaildomain=''
alertemail=''
mailgunapikey=''
# max capacity % before getting capacity alert
maxCapacity=80
# age of scrub (in seconds) before getting scrub alert
scrubExpire=1209600
function email {
curl -s --user "api:${mailgunapikey}" \
https://api.mailgun.net/v3/${emaildomain}/messages \
-F from="zfs alerts <no-reply@${emaildomain}>" \
-F to=${alertemail} \
-F subject="$1" \
-F text="$2"
printf "\n"
}
currentDate=$(date +%s)
zfsVolumes=$(/sbin/zpool list -H -o name)
capacity=$(/sbin/zpool list -H -o capacity)
errors=$(/sbin/zpool status | grep ONLINE | grep -v state | awk '{print $3 $4 $5}' | grep -v 000)
for volume in ${zfsVolumes}
do
condition=$(/sbin/zpool status ${volume} | egrep -i '(DEGRADED|FAULTED|OFFLINE|UNAVAIL|REMOVED|FAIL|DESTROYED|corrupt|cannot|unrecover)')
if [ "${condition}" ]; then
email "zfs alerts ${hostname} check condition of ${volume}" "${condition}"
fi
done
capacityExceeded=false
for line in ${capacity//%/}
do
if [ $line -ge $maxCapacity ]; then
capacityExceeded=true
fi
done
if [ "$capacityExceeded" = true ] ; then
email "zfs alerts ${hostname} capacity exceeded" "${capacity}"
fi
if [ "${errors}" ]; then
email "zfs alerts ${hostname} drive errors" "${errors}"
fi
for volume in ${zfsVolumes}
do
if [ $(/sbin/zpool status $volume | egrep -c "none requested") -ge 1 ]; then
echo "ERROR: You need to run \"zpool scrub $volume\" before this script can monitor the scrub expiration time."
break
fi
if [ $(/sbin/zpool status $volume | egrep -c "scrub in progress|resilver") -ge 1 ]; then
break
fi
### FreeBSD with *nix supported date format
#scrubRawDate=$(/sbin/zpool status $volume | grep scrub | awk '{print $15 $12 $13}')
#scrubDate=$(date -j -f '%Y%b%e-%H%M%S' $scrubRawDate'-000000' +%s)
### Ubuntu with GNU supported date format
scrubRawDate=$(/sbin/zpool status $volume | grep scrub | awk '{print $13" "$14" " $15" " $16" "$17}')
scrubDate=$(date -d "$scrubRawDate" +%s)
if [ $(($currentDate - $scrubDate)) -ge $scrubExpire ]; then
email "zfs alerts ${hostname} volume needs scrub" "${volume} needs scrub"
fi
done
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