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Shell Script to check tomcat status and restart

The below script checks the status of a particular tomcat status and restarts it if the tomcat does not respond....

TOMCAT_HOME=/usr/local/tomcat-folder/

is_Running ()
{

        wget -O - http://yourserver.com/ >& /dev/null
 if( test $? -eq 0 ) then
  return 0
 else
  return 1
 fi
}


kill_Hanged_Processes ()
{
 echo "killing hanged processes......"
 javaProcs=`ps -efl| grep -v grep | grep java`
 if(test ! -z "$javaProcs") then
  echo "nonzero"
  processId=`echo $javaProcs | awk '{ print $2} '`
  echo "$processId"
  kill -9 $processId
 fi
}
stop_Tomcat ()
{
 echo "shutting down......"
 $TOMCAT_HOME/bin/shutdown.sh
}

start_Tomcat ()
{
 echo "starting......"
 $TOMCAT_HOME/bin/startup.sh
}

restart ()
{
 stop_Tomcat
 sleep 10
 kill_Hanged_Processes
 start_Tomcat
 sleep 60
}

send_Mail ()
{
#!/bin/bash
# script to send simple email
# email subject
SUBJECT="Telegraphindia.com went down"
# Email To ?
EMAIL="mailid1@gmail.com,mailid2@gmail.com"
# Email text/message
EMAILMESSAGE="/tmp/emailmessage.txt"
echo $1 > $EMAILMESSAGE
#echo "This is email text" >>$EMAILMESSAGE
# send an email using /bin/mail
/bin/mail -s "$SUBJECT" "$EMAIL" < $EMAILMESSAGE


}


moniter_Tomcat_Health ()
{
 while(true)
 do
  sleep $1
  is_Running
  if(test $? -eq 0 ) then
   echo "Tomcat is running properly........."
  else
   echo "Tomcat not Responding........."
   downat=`date`
   restart
   upat=`date`
   is_Running
   if(test $? -eq 0 ) then
    msg=" Tomcat Server was down at $downat and was  restarted successfully at $upat"
    echo "$msg"
    send_Mail "$msg"
   else
    msg=" Tomcat Server was down at $downat. Restart failed"
    echo "$msg"
    send_Mail "$msg"   
    exit 0
   fi
  fi
 done
}


#usage: moniter_Tomcat_Health  frequency
moniter_Tomcat_Health 5

Comments

  1. This is a very helpful post. Thanks....

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Virus f Opyum Team

Symptoms :: 
Several processes running named f or i. 
Network choked
Apache Dead
Unknown entry  * * * * * root f Opyum Team in crontab

Investigate ::
Try to kill the f process and even root will be unable to kill it. Check file named f and i in /etc or /bin or /usr/sbin directory. Try to delete, the file f  will not delete.  Some unknown .jpg files will be there in the same folder. 

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#vi /etc/crontab (and delete last line)
#reboot


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