Script to automatically relaunch Nginx and MySQL servers

relaunch-services.sh

#!/bin/bash

#settings
EMAIL="[email protected]"
SUBJECT="THE EMAIL SUBJECT"

# date
DATETIME=$(date +%F_%T)
DATE=$(date +"%Y-%m-%d")

# test nginx
function check_for_nginx() {
    if [[ ! "$(/usr/sbin/service nginx status)" =~ "is running" ]]
    then
        echo "$DATETIME : restarting nginx..."
        /usr/sbin/service nginx start

        echo "Nginx server has been restarted: $DATETIME." | mail -s "$SUBJECT NGINX RESTARTED" "$EMAIL"
    else
        echo "$DATETIME : nginx is running"
    fi
}

# test apache
function check_for_apache() {
    if [[ ! "$(/usr/sbin/service apache2 status)" =~ "is running" ]]
    then
        echo "$DATETIME : restarting apache..."
        /usr/sbin/service apache2 start

        echo "Apache server has been restarted: $DATETIME." | mail -s "$SUBJECT APACHE RESTARTED" "$EMAIL"
    else
        echo "$DATETIME : apache is running"
    fi
}

# test mysql
function check_for_mysql_old() {
    if [[ ! "$(/usr/sbin/service mysql status)" =~ "start/running" ]]
    then
        echo "$DATETIME : restarting mysql..."
        /usr/sbin/service mysql start

        echo "MySQL server has been restarted: $DATETIME." | mail -s "$SUBJECT MYSQL RESTARTED" "$EMAIL"
    else
        echo "$DATETIME : mysql is running"
    fi
}

# test mysql
function check_for_mysql() {
    UP=$(pgrep mysql | wc -l);

    if [ "$UP" -eq 0 ];
    then
        echo "$DATETIME : restarting mysql..."
        /usr/sbin/service mysql start

        echo "MySQL server has been restarted: $DATETIME." | mail -s "$SUBJECT MYSQL RESTARTED" "$EMAIL"
    else
        echo "$DATETIME : mysql is running"
    fi
}


function lets_do_it_now() {
    # check_for_nginx
    check_for_apache
    check_for_mysql
}

# We have everything, let's do it.
lets_do_it_now

Add the script to the cronjob with the command crontab -e:

*/10 * * * * /root/relaunch-services.sh >> /root/relaunch-services.log 2>&1

This will execute the script every 10 minutes and redirect the output to the log file (stdout and stderr)