#!/bin/bash
#template from http://www.juliux.de/nagios-plugin-vorlage-bash
# !!!  mismatch_cnt   https://web.archive.org/web/20201214182307/https://www.thomas-krenn.com/en/wiki/Mdadm_checkarray_function
# recovery resync  https://web.archive.org/web/20160801015011/https://www.thomas-krenn.com/en/wiki/Mdadm_recovery_and_resync
# recovery degraded https://web.archive.org/web/20150102095244/http://www.thomas-krenn.com/en/wiki/Mdadm_recover_degraded_Array
# Mdadm checkarray function
# https://github.com/glensc/nagios-plugin-check_raid

WARN_LIMIT=$1
CRIT_LIMIT=$2
if [ -z $WARN_LIMIT ] || [ -z $CRIT_LIMIT ];then
echo "Usage: check_linux_raid_mismatch WARNLIMIT CRITLIMIT"
exit 3;
else
DATA=-1
for file in /sys/block/md*/md/mismatch_cnt
do
  DATA2=`cat $file`
  DATA=$((DATA + DATA2))
  MD_NAME=`echo $file | awk 'BEGIN { FS = "/" } ; { print $4 }'`
  PERF_DATA+="$MD_NAME=`cat $file` "
done
if [ $DATA -eq -1 ]; then
echo "UNKNOWN - software raid mismatch_cnts not found | $PERF_DATA"
exit 3;
fi
if [ $DATA -lt $WARN_LIMIT ]; then
echo "OK - all software raid mismatch_cnts are smaller than $WARN_LIMIT / upd:'$(date  +%d.%m.%Y\ %H:%M:%S) | $PERF_DATA"
exit 0;
fi
if [ $DATA -ge $WARN_LIMIT ] && [ $DATA -lt $CRIT_LIMIT ]; then
echo "WARNING - software raid mismatch_cnts are greater or equal than $WARN_LIMIT / upd:'$(date  +%d.%m.%Y\ %H:%M:%S) | $PERF_DATA"
exit 1;
fi
if [ $DATA -ge $CRIT_LIMIT ]; then
echo "CRITICAL - software raid mismatch_cnts are greater or equal than $CRIT_LIMIT / upd:'$(date  +%d.%m.%Y\ %H:%M:%S) | $PERF_DATA"
exit 2;
fi
if [ $DATA -eq -1 ]; then
echo "UNKNOWN - software raid mismatch_cnts not found | $PERF_DATA"
exit 3;
fi
fi