Nagios check_redis_llen.sh

check_redis_llen.sh

#!/bin/bash
# A simple nagios check for Redis set length
# 
# It doesn't require any redis libraries and uses the raw api 
#
# @author Richard Caceres (me@rchrd.net)
# @license MIT
# @example check_redis_llen -c 50 -w 10 -k celery -h localhost -p 6379
 
# Parse -c -w args
critical=50
warning=10
key="celery"
host="localhost"
port="6379"
 
set -- $(getopt c:w:k:h:p: "$@")
while [ $# -gt 0 ]
do
    case "$1" in
    (-c) critical=$2; shift;;
    (-w) warning=$2; shift;;
    (-k) key=$2; shift;;
    (-h) host=$2; shift;;
    (-p) port=$2; shift;;
    (--) shift; break;;
    (-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
    (*)  break;;
    esac
    shift
done
 
# Run redis command
result_raw=$((echo -en "llen $key\r\n";) | nc $host $port)
result=$(echo $result_raw | sed 's/[^0-9]*//g')
 
re='^[0-9]+$'
if ! [[ $result =~ $re ]]; then
  echo "Invalid input (not numeric): $result_raw"
  exit 2
fi
 
if [ "$result" -ge $warning ]; then exit 1;
elif [ "$result" -ge $critical ]; then exit 2;
else exit 0;
fi