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zpool_report.sh
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zpool_report.sh
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#!/bin/sh
### Parameters ###
# Specify your email address here:
email=""
# zpool output changed from FreeNAS version 11.0 to 11.1, breaking
# our parsing of the scrubErrors and scrubDate variables. Added a
# conditional to test for the FreeNAS version and parse accordingly.
# This changed again with the release of TrueNAS. Ironically, back to
# the way parsing worked with older versions of FreeNAS.
#
# We obtain the FreeBSD version using uname, as suggested by user
# Chris Moore on the FreeBSD forum.
#
# 'uname -K' gives 7-digit OS release and version, e.g.:
#
# FreeBSD 11.0 1100512
# FreeBSD 11.1 1101505
# FreeBSD 12.2 1202000
#
# If a scrub runs longer than 24 hours, we have two additional tokens to parse in the
# zpool status scan line output ("'x' days"):
#
# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
# scan: scrub repaired 0B in 1 days 11:56:46 with 0 errors on Wed Dec 9 06:07:04 2020
#
# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
# scan: scrub repaired 0B in 00:09:11 with 0 errors on Sun Dec 13 17:31:24 2020
fbsd_relver=$(uname -K)
freenashost=$(hostname -s | tr '[:lower:]' '[:upper:]')
boundary="===== MIME boundary; FreeNAS server ${freenashost} ====="
logfile="/tmp/zpool_report.tmp"
subject="ZPool Status Report for ${freenashost}"
pools=$(zpool list -H -o name)
usedWarn=75
usedCrit=90
scrubAgeWarn=30
warnSymbol="?"
critSymbol="!"
### Set email headers ###
printf "%s\n" "To: ${email}
Subject: ${subject}
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary=\"$boundary\"
--${boundary}
Content-Type: text/html; charset=\"US-ASCII\"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
<html><head></head><body><pre style=\"font-size:14px; white-space:pre\">" >> ${logfile}
###### summary ######
(
echo "########## ZPool status report summary for all pools on server ${freenashost} ##########"
echo ""
echo "+--------------+--------+------+------+------+----+----+--------+------+-----+"
echo "|Pool Name |Status |Read |Write |Cksum |Used|Frag|Scrub |Scrub |Last |"
echo "| | |Errors|Errors|Errors| | |Repaired|Errors|Scrub|"
echo "| | | | | | | |Bytes | |Age |"
echo "+--------------+--------+------+------+------+----+----+--------+------+-----+"
) >> ${logfile}
for pool in $pools; do
if [ "$fbsd_relver" -ge 1101000 ]; then
frag="$(zpool list -H -o frag "$pool")"
else
if [ "${pool}" = "freenas-boot" ] || [ "${pool}" = "boot-pool" ]; then
frag=""
else
frag="$(zpool list -H -o frag "$pool")"
fi
fi
status="$(zpool list -H -o health "$pool")"
errors="$(zpool status "$pool" | grep -E "(ONLINE|DEGRADED|FAULTED|UNAVAIL|REMOVED)[ \t]+[0-9]+")"
readErrors=0
for err in $(echo "$errors" | awk '{print $3}'); do
if echo "$err" | grep -E -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" | grep -E -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" | grep -E -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 $2}')" = "scrub" ]; then
parseLong=0
if [ "$fbsd_relver" -gt 1101000 ] && [ "$fbsd_relver" -lt 1200000 ]; then
parseLong=$((parseLong+1))
fi
if [ "$(zpool status "$pool" | grep "scan" | awk '{print $7}')" = "days" ]; then
parseLong=$((parseLong+1))
fi
scrubRepBytes="$(zpool status "$pool" | grep "scan" | awk '{print $4}')"
if [ $parseLong -gt 0 ]; then
scrubErrors="$(zpool status "$pool" | grep "scan" | awk '{print $10}')"
scrubDate="$(zpool status "$pool" | grep "scan" | awk '{print $17"-"$14"-"$15"_"$16}')"
else
scrubErrors="$(zpool status "$pool" | grep "scan" | awk '{print $8}')"
scrubDate="$(zpool status "$pool" | grep "scan" | awk '{print $15"-"$12"-"$13"_"$14}')"
fi
scrubTS="$(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" ]; then
symbol="$critSymbol"
elif [ "$scrubErrors" != "N/A" ] && [ "$scrubErrors" != "0" ]; then
symbol="$critSymbol"
elif [ "$status" != "ONLINE" ] \
|| [ "$readErrors" != "0" ] \
|| [ "$writeErrors" != "0" ] \
|| [ "$cksumErrors" != "0" ] \
|| [ "$used" -gt "$usedWarn" ] \
|| [ "$(echo "$scrubAge" | awk '{print int($1)}')" -gt "$scrubAgeWarn" ]; then
symbol="$warnSymbol"
elif [ "$scrubRepBytes" != "0" ] && [ "$scrubRepBytes" != "0B" ] && [ "$scrubRepBytes" != "N/A" ]; then
symbol="$warnSymbol"
else
symbol=" "
fi
(
printf "|%-12s %1s|%-8s|%6s|%6s|%6s|%3s%%|%4s|%8s|%6s|%5s|\n" \
"$pool" "$symbol" "$status" "$readErrors" "$writeErrors" "$cksumErrors" \
"$used" "$frag" "$scrubRepBytes" "$scrubErrors" "$scrubAge"
) >> ${logfile}
done
(
echo "+--------------+--------+------+------+------+----+----+--------+------+-----+"
) >> ${logfile}
###### for each pool ######
for pool in $pools; do
(
echo ""
echo "########## ZPool status report for ${pool} ##########"
echo ""
zpool status -v "$pool"
) >> ${logfile}
done
printf "%s\n" "</pre></body></html>
--${boundary}--" >> ${logfile}
### Send report ###
if [ -z "${email}" ]; then
echo "No email address specified, information available in ${logfile}"
else
sendmail -t -oi < ${logfile}
rm ${logfile}
fi