#!/bin/bash
#Scott Sullivan
#Automated nginx service check/restart script.

DATE=`date "+%m%d%y [%k:%M]"`
LOGDATE=`date "+%m-%d-%y [%k:%M:%S]"`
mail=/bin/mail
sysadmin=ssullivan@liquidweb.com
nginxfile=/tmp/nginx.txt
logfile=/var/log/checknginx.log
file=/var/log/checknginx.log

if [ -e $file ]; then
        echo ""
else
        touch /var/log/checknginx.log
fi

echo "$LOGDATE - Nginx Service Check starting up " >> $logfile

function stopnginx
{
        /etc/init.d/nginx stop > /dev/null 2>&1
        killall -9 nginx > /dev/null 2>&1
}

function startnginx
{
        DATE=`date "+%m%d%y [%k:%M]"`
        LOGDATE=`date "+%m-%d-%y [%k:%M:%S]"`
        stopnginx
        echo "Nginx is down, attempting to restart on $DATE" >> $nginxfile
        cat $nginxfile | $mail -s 'Nginx Restart' $sysadmin
        /etc/init.d/nginx stop > /dev/null 2>&1
        killall -9 nginx > /dev/null 2>&1
        /etc/init.d/nginx start > /dev/null 2>&1
        rm $nginxfile
}

function checkpid
{
        DATE=`date "+%m%d%y [%k:%M]"`
        LOGDATE=`date "+%m-%d-%y [%k:%M:%S]"`
        compare=`ps aux | grep -v grep | grep "nginx: worker process"`
        if [ -z "$compare" ]
        then
                echo "$LOGDATE - No Nginx Running! Restarting..." >> $logfile
                startnginx
        else
                echo "$LOGDATE - Nginx Running..." >> $logfile
        fi
}

count="0"
while [  $count -lt "10" ]; do
        checkpid
        sleep 60s
done