Linux Software RAID monitoring
| Author | Damien Martins |
|---|---|
| Compatibility | Xymon 4.2.2/4.2.3 - Kernel Linux 2.2/2.4/2.6 |
| Requirements | MDADM, unix, shell |
| Download | Part of https://github.com/doktoil-makresh/xymon-plugins.git |
| Last Update | 2010-01-15 |
Description
Linux software RAID monitoring (using MDADM) -Status of any RAID device -Resync/recovery detection
Installation
Client side
Copy bb-mdstat.sh in hobboit/xymon ext directory (usually in HOBBITCLIENTHOME/ext) Add the following lines to HOBBITCLIENTHOME/etc/clientlaunch.cfg :
[raid]
#DISABLED
ENVFILE $HOBBITCLIENTHOME/etc/hobbitclient.cfg
CMD $HOBBITCLIENTHOME/ext/bb-mdstat.sh
LOGFILE $HOBBITCLIENTHOME/logs/bb-mdstat.log
INTERVAL 5m
Server side
Add the “raid” tag for appropriated hosts in HOBBITSERVERHOME/etc/bb-hosts, for example :
123.234.123.234 toto # raid
Source
Show Code ⇲
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#!/bin/sh
################################ bb-mdstat.sh ###################################
# This script was based on bb-raid.sh, it worked for me, but I only have a #
# a single raid5 array, so your mileage may vary. Apparently the /proc/mdstat #
# file format changed from Linux 2.0 to 2.2 to 2.4, this script works on Linux #
# 2.4.x, and may work on other versions with the appropriate patches. #
# Due to bb-raid.sh license, all this script is still one hundred per cent GPL #
# #
# 15/01/2010 - Stuart dot Carmichael at iinet dot net dot au #
# Version 1.3.1 #
# -Different bug fixes, RAID1 and RAID5 support confirmed #
# 05/01/2010 - Damien Martins - doctor hat makelofine d0t org #
# Version 1.3-alpha #
# -Getting working test for failed (F) device #
# 18/12/2009 - Damien Martins - doctor hat makelofine d0t org #
# Version 1.2-alpha #
# Major bugfix to found devices failure (indicated with (F) in #
# /proc/mdstat, and identify wich device is failed #
# - Stuart Carmichael - new code block to test RAID1/5 md for #
# failed/removed devices #
# 1/12/2009 - Stuart dot Carmichael at iinet dot net dot au #
# Version 1.1-alpha #
# Minor bugfix to rectify red alerts on similarly named md's #
# eg, a server with md1 and md10 would error on md1 (non-unique #
# grep returned from /proc/mdstat) #
# #
# 10/10/2009 - Damien Martins - doctor hat makelofine d0t org #
# Version 1.0-alpha - Major code rewrite to decrease CPU usage by using less #
# commands and get a faster result #
# #
# 17/09/2009 - Damien Martins - doctor hat makelofine d0t org #
# Version 0.6.1 - Minor code rewrites to increase debug and correct some bugs #
# #
# 28/08/2009 - Damien Martins - doctor hat makelofine d0t org #
# Version 0.6 - Minor code rewrites in order to ease debug and new features #
# #
# 27/07/2009 - Damien Martins - doctor hat makelofine d0t org #
# Version 0.5 - Support any name of RAID devices. Tested compatibility for #
# Linux kernel 2.6 and wider resync detection. Higher #
# compatibility with Xymon. #
# #
# 03/10/2003 #
# Version 0.4 - Automatically detect number of raid devices. #
# #
# 25/09/2003 #
# Version 0.3 - Set to support more than four raid devices. #
# #
# 16/09/2001 #
# Version 0.2 - Significant bug fix for non-green detection. Added resync #
# detection to change to yellow. Various other minor cosmetic bug #
# fixes. #
# #
# 16/06/2001 #
# Version 0.1 - Initial write, so far it is confirmed to be green when #
# everything is OK, no other testing has been done ! #
#################################################################################
export BBPROG=bb-mdstat.sh
TEST="raid"
unset DEBUG
if [ "$1" == "debug" ] ; then
DEBUG=1
BB=echo
MACHINE=xymon_client
BBDISP=xymon_server
BBHOME=/tmp
BBTMP=$(pwd)
AWK=/bin/awk
CAT=/bin/cat
DATE=/bin/date
GREP=/bin/grep
HEAD=/bin/head
RM=/bin/rm
TAIL=/bin/tail
SED=/bin/sed
fi
if [ -z $BBHOME ] ; then
echo "BBHOME is not set... exiting"
exit 1
fi
if [ ! -d "$BBTMP" ] ; then # GET DEFINITIONS IF NEEDED
echo "*** LOADING HOBBITCLIENT.CFG ***"
. $BBHOME/etc/hobbitclient.cfg # INCLUDE STANDARD DEFINITIONS
fi
#
# NOW COLLECT SOME DATA
# md: syncing RAID array
# md: updating
# md: removing former faulty
# md: active
for MD_DEVICE in $($GREP ^md /proc/mdstat | $AWK '{print $1}') ; do # Create a list of MD devices, and for each one, do the following
STATUS="success"
if [ -f $BBTMP/bb-mdstat_"$MD_DEVICE"* ] ; then #Erase the temporary file we created previously
$RM $BBTMP/bb-mdstat_"$MD_DEVICE"*
fi
$GREP ^"${MD_DEVICE} :" /proc/mdstat > $BBTMP/bb-mdstat_$MD_DEVICE #Create a temporary file to work on MD device
if [ $? -ne 0 ] ; then
LINE_COLOR=red
TMPLINE="Disk failed"
fi
if [ $DEBUG ] ; then
echo "Debug : MD_DEVICE : $MD_DEVICE ; STATUS_LINE : $($CAT $BBTMP/bb-mdstat_$MD_DEVICE)"
fi
$GREP -q "(F)" $BBTMP/bb-mdstat_$MD_DEVICE #Look for failed "(F)" in /proc/mdstat
if [ $? -eq 0 ] ; then
# SC Syntax error on next line. missing $CAT; missing value for $SED
for DEVICE in $($SED -e s/${MD_DEVICE}\ :\ active\ raid[0-5]\ // -e s/${MD_DEVICE}\ :\ active\ linear// -e s/${MD_DEVICE}\ :\ active\ multipath// -e s/${MD_DEVICE}\ :\ active\ faulty// ${BBTMP}/bb-mdstat_${MD_DEVICE}) ; do #Found wich device is in (F) status
echo $DEVICE | $GREP -q "(F)"
if [ $? -eq 0 ] ; then
LINE_COLOR=red
RED=1
TMPLINE="
Device $DEVICE used for $MD_DEVICE is KO" # Write to temporary file the result
fi
done
fi
# The following test is limited to Linux only. Other Distros sto be tested (eg Solaris)
# Additional testing added SC 17/12/09
if [ "$(uname -s)" = "Linux" ]; then
# test the metadevice has all expected devices active.
# only check RAID-1 and RAID-5 devices: test is not valid for RAID-0
raid_level="$(${GREP} ^"${MD_DEVICE} :" /proc/mdstat|$AWK '{ print $4 }')"
if [[ $raid_level = "raid1" || $raid_level = "raid5" ]]; then # test for raid1 or raid5 only
data="$(${GREP} -A 1 ^"${MD_DEVICE} :" /proc/mdstat|tail -1)" # contents of the last line for the md device
active_devices="$(echo $data|$AWK '{ print $(NF - 1) }')" # extract the second last field (NF-1)
failed_devices="$(echo $data|$AWK '{ print $NF }')" # extract the last field (NF)
num_active_devices="$(echo $active_devices|$SED 's/\[//g'|$SED 's/\]//g'|$AWK -F/ '{ print $1 }')"
num_failed_devices="$(echo $active_devices|$SED 's/\[//g'|$SED 's/\]//g'|$AWK -F/ '{ print $2 }')"
if [ $num_active_devices -ne $num_failed_devices ]; then
STATUS="failed"
LINE_COLOR=red
RED=1
TMPLINE="
Expected device count does not equal active device count ($active_devices)" # Write to temporary file the result
fi
fi # end raid1/raid5 test
fi # end if GNU/Linux SC 17/12/09
if [ $STATUS = "failed" ] ; then
echo "&"$LINE_COLOR" $MD_DEVICE $TMPLINE" > $BBTMP/bb-mdstat_$MD_DEVICE.out
else # SC 11/1/10
if [ $DEBUG ] ; then
echo "Debug : TMPLINE : $TMPLINE ; LINE_COLOR : $LINE_COLOR ; MD_DEVICE= : $MD_DEVICE"
fi
STATUS="$($AWK '{print $3}' $BBTMP/bb-mdstat_$MD_DEVICE)" #See the status of MD device, and depending on result, do the following
case $STATUS in
active) LINE_COLOR=green ; GREEN=1 ; TMPLINE="Status OK"
;;
failed) LINE_COLOR=red ; RED=1 ; TMPLINE="Status Failed"
;;
updating) LINE_COLOR=yellow ; YELLOW=1 ; TMPLINE="Status updating"
;;
*) LINE_COLOR=red ; RED=1 ; TMPLINE="Status KO :
Status : $STATUS
$BBTMP/bb-mdstat_$MD_DEVICE :
$($CAT $BBTMP/bb-mdstat_$MD_DEVICE)
/proc/mdstat :
$($CAT /proc/mdstat)"
;;
esac
RESYNC=$($GREP -A 3 ^$MD_DEVICE /proc/mdstat | $AWK '{print $2}') # Now check for resync bb-mdstat_ device
if [ "$RESYNC" == "resync" ] || [ "$RESYNC" == "recovery" ] ; then
if [ -z $RED ] ; then
LINE_COLOR=yellow
YELLOW=1
TMPLINE="Resync in progress"
fi
fi
echo "&"$LINE_COLOR" $MD_DEVICE $TMPLINE" >> $BBTMP/bb-mdstat_$MD_DEVICE.out
fi # end if $RED else
if [ $DEBUG ] ; then
echo "Debug : TMPLINE : $TMPLINE ; LINE_COLOR : $LINE_COLOR ; MD_DEVICE= : $MD_DEVICE"
fi
done
if [ $RED ] ; then
COLOR=red
elif [ $YELLOW ] ; then
COLOR=yellow
elif [ $GREEN ] ; then
COLOR=green
else
COLOR=grey
fi
LINE="status $MACHINE.$TEST $COLOR $($DATE)
"
for MD_DEVICE in $($GREP ^md /proc/mdstat | $AWK '{print $1}') ; do
if [ -f $BBTMP/bb-mdstat_$MD_DEVICE.out ] ; then
LINE="$LINE
$($CAT $BBTMP/bb-mdstat_$MD_DEVICE.out)"
fi
done
LINE="$LINE
============================ /proc/mdstat ===========================
$($CAT /proc/mdstat)
============================ End of file ============================"
if [ -z $DEBUG ] ; then
$RM $BBTMP/bb-mdstat_*
fi
$BB $BBDISP "$LINE" # SEND TO BBDISPLAY
Known Bugs and Issues
None
To Do
None
Credits
Reimplementation of deadcat's bb-mdstat.sh
Several updates/bug fixes by Stuart Carmichael, who tested on more configurations than mine.
Changelog
- 2001-06-16 v0.1
- Initial release
- 2001-00-16 v0.2
- Significant bug fix for non-green detection.
- Added resync detection to change to yellow.
- Various other minor cosmetic bug fixes.
- 2003-09-25 v0.3
- Set to support more than four raid devices.
- 2003-10-03 v0.4
- Automatically detect number of raid devices.
- 2009-07-27 v0.5
- Support any name for RAID devices.
- Tested compatibility for linux kernel 2.6 and wider resync detection.
- Higher compatibility with Xymon.
- 2009-08-28 v0.6
- Minor code rewrites in order to ease debug and new features.
- 2009-09-17 v0.6.1
- Minor code rewrites to increase debug and correct some bugs.
- 2009-10-11 v1.0alpha
- Major code rewrite to decrease CPU usage by using less commands and get a faster result.
- 2009-10-11 v1.1alpha
- Minor bugfix to rectify red alerts on similarly named md's eg, a server with md1 and md10 would error on md1 (non-unique grep returned from /proc/mdstat).
- 2010-01-15 v1.3.1
- Sevral bugfix and new tests. Confirmed on RAID1 and RAID5.