Linux

check_md_raid

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Description:

Check all active software raid arrays on a Linux server.

Current Version

Last Release Date

June 16, 2009

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Owner

Nagios Exchange

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Project Files
FileDescription
check_md_raid

check_md_raid

Project Notes
Simple shell script that reads /proc/mdstat and creates some status according to that files content. Unlike other scripts found here this script does not need any root access to mdadm. Just start it, the script doesn't need any arguments.
Reviews (4) Add a Review
Fixed some deprecated commad
by damned, December 31, 2023
Hi, here's my version that works on my config, i changed some deprecated commands:

#!/bin/bash
#
# Created by Sebastian Grewe, Jammicron Technology
#

# Get count of raid arrays
RAID_DEVICES=$(grep ^md -c /proc/mdstat)

# Get count of degraded arrays
#RAID_STATUS=`grep "[.*_.*]" /proc/mdstat -c`
RAID_STATUS=$(grep -E "[.*(=|>|.).*]" /proc/mdstat -c)

# Is an array currently recovering, get percentage of recovery
RAID_RECOVER=$(grep recovery /proc/mdstat | awk '{print $4}')
RAID_RESYNC=$(grep resync /proc/mdstat | awk '{print $4}')
RAID_CHECK=$(grep check /proc/mdstat | awk '{print $4}')

# Check raid status
# RAID recovers --> Warning
if [ -n "${RAID_RECOVER}" ]; then
#if [[ $RAID_RECOVER ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, recovering : $RAID_RECOVER"
EXIT=1
elif [ -n "${RAID_RESYNC}" ]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, resync : $RAID_RESYNC"
EXIT=1
elif [ -n "${RAID_CHECK}" ]; then
STATUS="OK - Checked $RAID_DEVICES arrays, check : $RAID_CHECK"
EXIT=0
# RAID ok
elif [ -n "${RAID_STATUS}" = "0" ]; then
STATUS="OK - Checked $RAID_DEVICES arrays."
EXIT=0
# All else critical, better save than sorry
else
EXTEND_RAID_STATUS=$(grep -E "[.*(=|>|.|_).*]" /proc/mdstat | awk '{print $2}' | uniq -c | xargs echo)
STATUS="WARNING- Checked $RAID_DEVICES arrays, $RAID_STATUS have failed check: $EXTEND_RAID_STATUS "
EXIT=1
fi

# Status and quit
echo "$STATUS"
exit $EXIT
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Added OK For Check and %
by michael.luczkow, July 31, 2015
Hi,

I added another status for state "check" which is OK (0), and dumps the % complete.

############

[root@stack2 bin]# ./check_md_raid
OK - Checked 1 arrays, check : 0.4%

############

[root@stack2 bin]# more ./check_md_raid
#!/bin/bash
#
# Created by Sebastian Grewe, Jammicron Technology
#

# Get count of raid arrays
RAID_DEVICES=`grep ^md -c /proc/mdstat`

# Get count of degraded arrays
#RAID_STATUS=`grep "[.*_.*]" /proc/mdstat -c`
RAID_STATUS=`egrep "[.*(=|>|.).*]" /proc/mdstat -c`

# Is an array currently recovering, get percentage of recovery
RAID_RECOVER=`grep recovery /proc/mdstat | awk '{print $4}'`
RAID_RESYNC=`grep resync /proc/mdstat | awk '{print $4}'`
RAID_CHECK=`grep check /proc/mdstat | awk '{print $4}'`

# Check raid status
# RAID recovers --> Warning
if [[ $RAID_RECOVER ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, recovering : $RAID_RECOVER"
EXIT=1
elif [[ $RAID_RESYNC ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, resync : $RAID_RESYNC"
EXIT=1
elif [[ $RAID_CHECK ]]; then
STATUS="OK - Checked $RAID_DEVICES arrays, check : $RAID_CHECK"
EXIT=0
# RAID ok
elif [[ $RAID_STATUS == "0" ]]; then
STATUS="OK - Checked $RAID_DEVICES arrays."
EXIT=0
# All else critical, better save than sorry
else
EXTEND_RAID_STATUS=`egrep "[.*(=|>|.|_).*]" /proc/mdstat | awk '{print $2}' | uniq -c | xargs echo`
STATUS="WARNING- Checked $RAID_DEVICES arrays, $RAID_STATUS have failed check: $EXTEND_RAID_STATUS "
EXIT=1
fi

# Status and quit
echo $STATUS
exit $EXIT
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check_md_raid
by ndarkduck, January 31, 2014
Yet I changed some lines, making this script more useful for our environment, from the last review.

Next step would be to parse the raid status, but so far I got the messages listed below, so this is how far my script could go.

Cheers!

[======>..............] check = 34.7% (72921088/209711382) finish=6891.0min speed=330K/sec
[========>............] check = 43.7% (91719680/209711382) finish=480.0min speed=4096K/sec



#!/bin/bash
#
# Created by Sebastian Grewe, Jammicron Technology
#

# Get count of raid arrays
RAID_DEVICES=`grep ^md -c /proc/mdstat`

# Get count of degraded arrays
#RAID_STATUS=`grep "[.*_.*]" /proc/mdstat -c`
RAID_STATUS=`egrep "[.*(=|>|.).*]" /proc/mdstat -c`

# Is an array currently recovering, get percentage of recovery
RAID_RECOVER=`grep recovery /proc/mdstat | awk '{print $4}'`
RAID_RESYNC=`grep resync /proc/mdstat | awk '{print $4}'`

# Check raid status
# RAID recovers --> Warning
if [[ $RAID_RECOVER ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, recovering : $RAID_RECOVER"
EXIT=1
elif [[ $RAID_RESYNC ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, resync : $RAID_RESYNC"
EXIT=1
# RAID ok
elif [[ $RAID_STATUS == "0" ]]; then
STATUS="OK - Checked $RAID_DEVICES arrays."
EXIT=0
# All else critical, better save than sorry
else
EXTEND_RAID_STATUS=`egrep "[.*(=|>|.|_).*]" /proc/mdstat | awk '{print $2}' | uniq -c | xargs echo`
STATUS="WARNING- Checked $RAID_DEVICES arrays, $RAID_STATUS have failed check: $EXTEND_RAID_STATUS "
EXIT=1
fi

# Status and quit
echo $STATUS
exit $EXIT
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small modification
by Luiso, February 28, 2011
#!/bin/bash
#
# Created by Sebastian Grewe, Jammicron Technology
#

# Get count of raid arrays
RAID_DEVICES=`grep ^md -c /proc/mdstat`

# Get count of degraded arrays
RAID_STATUS=`grep "[.*_.*]" /proc/mdstat -c`

# Is an array currently recovering, get percentage of recovery
RAID_RECOVER=`grep recovery /proc/mdstat | awk '{print $4}'`
RAID_RESYNC=`grep resync /proc/mdstat | awk '{print $4}'`

# Check raid status
# RAID recovers --> Warning
if [[ $RAID_RECOVER ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, recovering : $RAID_RECOVER"
EXIT=1
elif [[ $RAID_RESYNC ]]; then
STATUS="WARNING - Checked $RAID_DEVICES arrays, resync : $RAID_RESYNC"
EXIT=1
# RAID ok
elif [[ $RAID_STATUS == "0" ]]; then
STATUS="OK - Checked $RAID_DEVICES arrays."
EXIT=0
# All else critical, better save than sorry
else
STATUS="CRITICAL - Checked $RAID_DEVICES arrays, $RAID_STATUS have FAILED"
EXIT=2
fi

# Status and quit
echo $STATUS
exit $EXIT
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