simple checkmk local plugin to check redis server state using a redis ping: expected response = pong

check_redis_ping.sh

#!/bin/bash
# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 smartindent nu ft=bash

declare -i RET=0
STATUS="OK"
O=$(REDISCLI_AUTH="$(sed '/^masterauth/!d;s/.* //g' /etc/redis/redis.conf)" redis-cli ping 2>&1)
RET=$?
if [ $RET -gt 0 ]; then
    RET=2
    STATUS="CRITICAL"
else
    if [ "$O" != "PONG" ]; then
        RET=1
        STATUS="WARNING"
    fi
fi
echo "$RET REDIS-PING exitcode=$RET $STATUS - ${O}"