ZPool report

#!/bin/sh

### Parameters ###
logfile="/tmp/zpool_report.tmp"
email="your_email@gmail.com"
subject="ZPool Status Report for FreeNAS"
pools="freenas-boot tank"
usedWarn=75
usedCrit=90
scrubAgeWarn=30
warnSymbol="?"
critSymbol="!"

### Set email headers ###
(
    echo "To: ${email}"
    echo "Subject: ${subject}"
    echo "Content-Type: text/html"
    echo "MIME-Version: 1.0"
    echo -e "\r\n"
) > "$logfile"

### Set email body ###
echo "<pre style=\"font-size:14px\">" >> "$logfile"

###### summary ######
(
    echo ""
    echo "########## ZPool status report summary for all pools ##########"
    echo ""
    echo "+--------------+--------+------+------+------+----+--------+------+-----+"
    echo "|Pool Name     |Status  |Read  |Write |Cksum |Used|Scrub   |Scrub |Last |"
    echo "|              |        |Errors|Errors|Errors|    |Repaired|Errors|Scrub|"
    echo "|              |        |      |      |      |    |Bytes   |      |Age  |"
    echo "+--------------+--------+------+------+------+----+--------+------+-----+"
) >> "$logfile"
for pool in $pools; do
    status="$(zpool list -H -o health "$pool")"
    errors="$(zpool status "$pool" | egrep "(ONLINE|DEGRADED|FAULTED|UNAVAIL|REMOVED)[ \t]+[0-9]+")"
    readErrors=0
    for err in $(echo "$errors" | awk '{print $3}'); do
        if echo "$err" | egrep -q "[^0-9]+"; then
            readErrors=1000
            break
        fi
        readErrors=$((readErrors + err))
    done
    writeErrors=0
    for err in $(echo "$errors" | awk '{print $4}'); do
        if echo "$err" | egrep -q "[^0-9]+"; then
            writeErrors=1000
            break
        fi
        writeErrors=$((writeErrors + err))
    done
    cksumErrors=0
    for err in $(echo "$errors" | awk '{print $5}'); do
        if echo "$err" | egrep -q "[^0-9]+"; then
            cksumErrors=1000
            break
        fi
        cksumErrors=$((cksumErrors + err))
    done
    if [ "$readErrors" -gt 999 ]; then readErrors=">1K"; fi
    if [ "$writeErrors" -gt 999 ]; then writeErrors=">1K"; fi
    if [ "$cksumErrors" -gt 999 ]; then cksumErrors=">1K"; fi
    used="$(zpool list -H -p -o capacity "$pool")"
    scrubRepBytes="N/A"
    scrubErrors="N/A"
    scrubAge="N/A"
    if [ "$(zpool status "$pool" | grep "scan" | awk '{print $2}')" = "scrub" ]; then
        scrubRepBytes="$(zpool status "$pool" | grep "scan" | awk '{print $4}')"
        scrubErrors="$(zpool status "$pool" | grep "scan" | awk '{print $8}')"
        scrubDate="$(zpool status "$pool" | grep "scan" | awk '{print $15"-"$12"-"$13"_"$14}')"
        scrubTS="$(date -j -f "%Y-%b-%e_%H:%M:%S" "$scrubDate" "+%s")"
        currentTS="$(date "+%s")"
        scrubAge=$((((currentTS - scrubTS) + 43200) / 86400))
    fi
    if [ "$status" = "FAULTED" ] \
    || [ "$used" -gt "$usedCrit" ] \
    || ( [ "$scrubErrors" != "N/A" ] && [ "$scrubErrors" != "0" ] )
    then
        symbol="$critSymbol"
    elif [ "$status" != "ONLINE" ] \
    || [ "$readErrors" != "0" ] \
    || [ "$writeErrors" != "0" ] \
    || [ "$cksumErrors" != "0" ] \
    || [ "$used" -gt "$usedWarn" ] \
    || [ "$scrubRepBytes" != "0" ] \
    || [ "$(echo "$scrubAge" | awk '{print int($1)}')" -gt "$scrubAgeWarn" ]
    then
        symbol="$warnSymbol"
    else
        symbol=" "
    fi
    (
        printf "|%-12s %1s|%-8s|%6s|%6s|%6s|%3s%%|%8s|%6s|%5s|\n" \
        "$pool" "$symbol" "$status" "$readErrors" "$writeErrors" "$cksumErrors" \
        "$used" "$scrubRepBytes" "$scrubErrors" "$scrubAge"
    ) >> "$logfile"
done
(
    echo "+--------------+--------+------+------+------+----+--------+------+-----+"
    echo ""
    echo ""
) >> "$logfile"

###### for each pool ######
for pool in $pools; do
    (
        echo ""
        echo "########## ZPool status report for ${pool} ##########"
        echo ""
        zpool status -v "$pool"
        echo ""
        echo ""
    ) >> "$logfile"
done

echo "</pre>" >> "$logfile"

### Send report ###
sendmail -t < "$logfile"
rm "$logfile"