check redis replication lag

check-redis-lag.sh

#!/bin/bash

# defaults

warning=3
critical=5

while getopts "w:c:" OPTION
do
     case $OPTION in
         h)
             usage
             exit 1
             ;;
         w)
             warning=$OPTARG
             ;;
         c)
             critical=$OPTARG
             ;;
         ?)
             usage
             exit
             ;;
     esac
done


master_last_io_seconds_ago=$( redis-cli info | grep master_last_io_seconds_ago | awk -F ":" '{print $2}' | sed -e s/\\r//g  )
echo $master_last_io_seconds_ago

if [ "$master_last_io_seconds_ago" -gt "$critical"  ] ; then echo  "CRITICAL - redis replication lag is more that $critical sec."; exit 2;
elif [ "$master_last_io_seconds_ago" -lt "$warning" && "$master_last_io_seconds_ago" -gt "0" ] ; then echo "WARNING - redis replication lag is more that $warning sec." ; exit 1;
elif [ "$master_last_io_seconds_ago" -eq "0" ] ; then echo "OK - redis replication lag is 0."
fi