Auto restart by log event

If an error happen in the last 5 minutes, 300 seconds, of events in "/var/log/message" the routine will restart the service.

# ./myscript.sh <number of seconds>
$ ./myscript.sh 300

This script convert date end time from "/var/log/message" to EPOCH and get the the number of lines with error that match the regex, then if there is lines with error inside the specified window, in seconds, the routine will restart the service.

#!/bin/bash

GET_COUNT() {
    cat /var/log/messages | \
        egrep "ERROR - my specific message of fail 1|ERROR - my specific message of fail 2" | \
        awk '{ print $1 " " $2 " "$3 } ' | \
        while read -r line
        do 
            date -d "$line" +"%s"
        done | \
        while read EPOCH
        do
            if [ $EPOCH -gt $1 ]
            then
                echo $EPOCH
            fi
        done | wc -l | awk '{print $1} '
}
RESTART_APP() {
    date
    systemctl restart MYAPP.service
    echo service restarted
}
export WINDOW=$1
export NOW=$(date +"%s")
export SINCE=$(expr $(date +"%s") - $WINDOW)


if [ $(GET_COUNT $SINCE) -gt 0 ]
then    
    RESTART_APP
fi