“nc-z”的CentOS7替代方案-AlternativeinCentOS7for“nc-z”

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I solved something similar with the following code:

我用下面的代码解决了类似的问题:

# Start command: nohup ./check_server.sh 2>&1 &
# 
FREQUENCY_CHECK=30
ENDPOINT=10.11.12.13
PORT=8080
# Avoid spamming yourself
EMAIL_LIMIT=3


check_server(){ # Start shell function

checkHTTPcode=$(curl -sLf -m 2 -w "%{http_code}\n" "http://$ENDPOINT:$PORT/" -o /dev/null)


if [ $checkHTTPcode -ne 200 ]

    then
        EMAIL_LIMIT=$((EMAIL_LIMIT-1))

        # Let's log. Life's boring
        echo "$(date) Check Failed " >> /var/log/check_server.log

    if [ $EMAIL_LIMIT -eq 0 ]
        then

        # Send last email..
        printf "%s\nCheck failed \n\n Last email to be sent. " | mail -s "Check Failed!" -S smtp=your.smtp.domain.here.com -S from="from@yourdomain.com" destination.email@yourdomain.com

        else

            if [ $EMAIL_LIMIT -ge 0 ]
                then
                # Send notification
                printf "%s\nCheck failed \n\n Notifications left: $EMAIL_LIMIT " | mail -s "Check Failed!" -S smtp=your.smtp.domain.here.com -S from="from@yourdomain.com" destination.email@yourdomain.com
            fi 

    fi

        # Take any corrective measure here if nedded.
        /sbin/service httpd restart >> /var/log/check_server.log

else
    # Let's log. Life's boring
    echo "$(date) Check OK " >> /var/log/check_server.log
fi
}


while true # infinite check
do
# Call function every 30 seconds
check_server
sleep $FREQUENCY_CHECK
done