Implemented check script
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check_mdstat.sh
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check_mdstat.sh
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#!/bin/bash
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#
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# Created by Sebastian Grewe, Jammicron Technology
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# Changes By Jasem Elayeb on 02.03.2016
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# Changes by Jasem Elayeb on 02.03.2016
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# Chagnes by Jonny007-MKD on 06.02.2020
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# JE: add Physical Disks Name RAID_DISKS
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# JE: add Physical Disks Status DISKS_STATUS
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# JE: add Array Names RAID_ARRAY
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# J007: Only check a single array
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# Get count of raid arrays
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RAID_DEVICES=`grep ^md -c /proc/mdstat`
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# Get count of degraded arrays
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RAID_STATUS=`grep "\[.*_.*\]" /proc/mdstat -c`
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if [ $# -lt 1 -o -z "$1" ]; then
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echo "ERROR: pass raid name as argument"
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exit 1;
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fi
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while [[ $# -gt 0 ]]; do
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case $1 in
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-r|--raid) TARGET_RAID_NAME="$2";;
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-?|--help)
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echo "Check /proc/mdstat. Arguments:"
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echo "--raid NAME: Raid name, e.g. md0"
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;;
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esac
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shift
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done
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# Is an array currently recovering, get percentage of recovery
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RAID_RECOVER=`grep recovery /proc/mdstat | awk '{print $4}'`
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# Is an array currently resyncing, get percentage of resync
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RAID_RESYNC=`grep resync /proc/mdstat | awk '{print $4}'`
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RAID_ARRAY=`awk '/md[1-9]/{for (i=1;i<=NF;++i) if ($i~/md[1-2]/)print $i}' /proc/mdstat |xargs`
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RAID_DISKS=`awk '/sd[a-z]/{for (i=1;i<=NF;++i) if ($i~/sd[a-z]/)print $i}' /proc/mdstat |xargs`
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DISKS_STATUS=`grep algorithm /proc/mdstat|awk '{print $12}'`
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# Check raid status
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# RAID recovers --> Warning
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if [[ $RAID_RECOVER ]]; then
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STATUS="WARNING - Checked $RAID_DEVICES arrays $RAID_ARRAY, recovering : $RAID_RECOVER"
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EXIT=1
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# RAID resync --> Warning
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elif [[ $RAID_RESYNC ]]; then
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STATUS="WARNING - Checked $RAID_DEVICES arrays $RAID_ARRAY., resyncing : $RAID_RESYNC"
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EXIT=1
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# RAID ok
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elif [[ $RAID_STATUS == "0" ]]; then
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STATUS="OK - Checked $RAID_DEVICES arrays $RAID_ARRAY."
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EXIT=0
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# All else critical, better save than sorry
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else
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STATUS="CRITICAL - Checked $RAID_DEVICES arrays $RAID_ARRAY, $RAID_STATUS have FAILED"
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EXIT=2
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if [ -z "$TARGET_RAID_NAME" ]; then
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echo "ERROR: pass --raid as argument"
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exit 255
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fi
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# Status and quit
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echo -e "$STATUS \n Physical Disks: $RAID_DISKS Disks Status: $DISKS_STATUS "
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exit $EXIT
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function log {
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local x=
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#echo " > $@"
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}
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CURRENT_RAID= # string
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function setCurrentRaid {
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# This function is called for each line in $1
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# If the line does not start with a whitespace, it denotes a new RAID device and CURRENT_RAID is set
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# Also, the state and the devices are parsed
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local line="$1"
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if [[ $line =~ ^[^\s].+:.+ ]]; then
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local x1="${line%:*}" # Remove : suffix
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local x2="${x1% *}" # Trim right
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CURRENT_RAID="$x2"
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log "SET CURRENT RAID"
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fi
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log "CURRENT RAID: $CURRENT_RAID"
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}
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STATE= # "active", "started", "inactive"
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LEVEL= # int
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DEVICES= # strings separated by whitespace
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function setStateAndDevicesAndLevel {
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# This functions is called for the line that starts a new RAID device by setCurrentRaid, with the complete line in $1
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# It parses the STATE, the LEVEL and the DEVICES
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local line="$1"
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local x1="${line#*: }" # Remove : prefix
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STATE="${x1%% *}" # Only the first word
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local x2="${x1:$((${#STATE}+1))}" # Remove the first word
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LEVEL="${x2%% *}" # Only the first word
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local x3="${x2:$((${#LEVEL}+1))}" # Remove the first word
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LEVEL="${LEVEL:4}" # Remove the raid prefix
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for dev1 in $x3; do
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local dev2="${dev1%[*}"
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if [ -n "$DEVICES" ]; then DEVICES="$DEVICES "; fi
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DEVICES="${DEVICES}$dev2"
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done
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log "STATE = $STATE"
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log "LEVEL = $LEVEL"
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log "DEVICES = $DEVICES"
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}
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SIZE_IN_BLOCKS="!" # int
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NUM_DEVICES=0 # int with number of devices in raid
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BAD_DEVICES=0 # int with number of "_" in "[UUU_UU]"
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function parseConfigStatusLine {
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# This function is called for 1st line after the raid definition line
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# It parses the SIZE_IN_BLOCKS
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local line="$1"
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line="${line:6}" # trim left
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SIZE_IN_BLOCKS=${line%% *}
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local lastWord=${line##* } # Get the last word
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lastWord=${lastWord:1:-1} # Remove first and last char
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NUM_DEVICES=${#lastWord} # str length = num devices
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lastWord=${lastWord//U/} # Remove all U, so only _ remain
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BAD_DEVICES=${#lastWord} # str length = num bad devices
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log "SIZE_IN_BLOCKS = $SIZE_IN_BLOCKS"
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log "NUM_DEVICES = $NUM_DEVICES"
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log "BAD_DEVICES = $BAD_DEVICES"
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# TODO
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}
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function parseBitmapOrRecoveryLine {
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# This function is called for the 2nd line after the raid definition line
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# It checks whether it contains a bitmap or a recovery line
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if [[ "$1" == *bitmap* ]]; then
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parseBitmapLine "$1"
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fi
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if [[ "$1" == *recovery* ]]; then
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parseRecoveryLine "$1"
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fi
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}
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function parseBitmapLine {
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local x
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# TODO
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}
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RECOVERY_PROGRESS= # float in percent
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RECOVERY_INFO= # finish and speed
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function parseRecoveryLine {
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# This function is called for the 2nd or 3rd lineafter the raid definition line
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# It sets the RECOVERY_PROGRESS
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local line="$1"
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local x1="${line##*recovery = }"
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local x2="${x1%%%*}"
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RECOVERY_PROGRESS="$x2"
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local x3="${line##*finish=}"
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RECOVERY_INFO="finish=$x3"
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log "RECOVERY_PROGESS = $RECOVERY_PROGRESS"
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log "RECOVERY_INFO = $RECOVERY_INFO"
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}
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function printOutputAndExit {
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# STATE, LEVEL, DEVICES, SIZE_IN_BLOCKS, NUM_DEVICES, BAD_DEVICES, RECOVERY_PROGRESS, RECOVERY_INFO
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local result="OK"
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local info=""
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if [ -n "$RECOVERY_PROGRESS" ]; then
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result="WARNING"
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if [ -n "$info" ]; then info="$info. "; fi
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info="${info}Recovering: $RECOVERY_PROGRESS $RECOVERY_INFO"
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fi
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if [ "$STATE" != "active" -a "$STATE" != "started" ]; then
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result="CRITICAL"
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if [ -n "$info" ]; then info="$info. "; fi
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info="${info}State is $STATE"
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fi
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if [ $BAD_DEVICES -gt 0 ]; then
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result="CRITICAL"
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if [ -n "$info" ]; then info="$info. "; fi
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info="${info}Missing $NUM_DEVICES devices"
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fi
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echo -n "$result"
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if [ -n "$info" ]; then
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echo -n ": $info"
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fi
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echo -n " |"
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echo -n " 'raid level'=$LEVEL"
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echo -n " 'size in blocks'=$SIZE_IN_BLOCKS"
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echo -n " 'num devices'=$NUM_DEVICES"
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echo -n " 'num bad devices'=$BAD_DEVICES;;1;0;$NUM_DEVICES"
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if [ -n "$RECOVERY_PROGRESS" ]; then
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echo -n " 'recovery progress'=$RECOVERY_PROGRESS%;0.1;;0;100"
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fi
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echo
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case $result in
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OK) exit 0;;
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WARNING) exit 1;;
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CRITICAL) exit 2;;
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esac
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}
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HAD_TARGET_RAID=0
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while IFS= read -r line; do
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#echo " : $line"
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setCurrentRaid "$line"
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if [ "$CURRENT_RAID" == "$TARGET_RAID_NAME" ]; then
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case $HAD_TARGET_RAID in
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0) setStateAndDevicesAndLevel "$line";;
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1) parseConfigStatusLine "$line";;
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2) parseBitmapOrRecoveryLine "$line";;
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3) parseRecoveryLine "$line";;
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esac
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HAD_TARGET_RAID=$(($HAD_TARGET_RAID+1))
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elif [ $HAD_TARGET_RAID -gt 0 ]; then
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printOutputAndExit
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fi
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done < /proc/mdstat
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echo "CRITICAL: RAID $TARGET_RAID_NAME not found in mdstat"
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exit 2
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