How to Automate WebLogic Domain Restart? When Physical or Virtual Linux Server Restart

==> This Method is very Useful in below Scenarios

 When Physical/Virtual  Linux Servers Crashed and You Brought Up Linux Server at the Same Time WebLogic Servers Also Started Without Manual Intervention.

During Maintenance of Linux Servers, If Your Restarting Linux Server in that case also WebLogic Application Servers will be Started Automatically by Using this Method.

If WebLogic Server Crashed Due to OOM(OutOfMemory) OR Due to any JVM BUG in that case also JVM will be restarted automatically. 

Summary:
========

1) Create nodemanager Script
2) Save the Script Inside Directory /etc/init.d

3) Issue the Command chkconfig for Script nodemanager

4) Change Properties Values in nodemanager.properties File
5) Start the NodeManager, AdminServer & Managed Server Through NodeManager
6) For Testing Purpose Restart the Linux Server & Check WebLogic Application Server Status.

STEPS:-
=======

Step-1) Create nodemanager Script 

     Create nodemanager file with below content & Change highlighted things as per your environment standards .

#!/bin/sh
# chkconfig:   345 85 15

# description: Oracle Weblogic NodeManager service
. /etc/rc.d/init.d/functions

export export DOMAIN_HOME="/oracle/Middleware/user_projects/domains/base_domain"
export JAVA_HOME="/oracle/java/jdk1.8.0_112/bin/java"
export WL_HOME="/oracle/Middleware/Oracle_Home/wlserver"
DAEMON_USER="wlsuser"
PROCESS_STRING="^.*/oracle/Middleware/Oracle_Home/.*weblogic.NodeManager.*"

source $WL_HOME/server/bin/setWLSEnv.sh > /dev/null
export NodeManagerHome="$DOMAIN_HOME/nodemanager"
NodeManagerLockFile="$NodeManagerHome/nodemanager.log.lck"

PROGRAM="$DOMAIN_HOME/bin/startNodeManager.sh > $NodeManagerHome/nodemanager.out 2>&1"
SERVICE_NAME=`/bin/basename $0`
LOCKFILE="/var/lock/subsys/$SERVICE_NAME"

RETVAL=0

start() {
        OLDPID=`/usr/bin/pgrep -f $PROCESS_STRING`
        if [ ! -z "$OLDPID" ]; then
            echo "$SERVICE_NAME is already running (pid $OLDPID) !"
            exit
        fi

        echo -n $"Starting $SERVICE_NAME: "
/bin/su $DAEMON_USER -c "$PROGRAM &"

        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && touch $LOCKFILE
}

stop() {
        echo -n $"Stopping $SERVICE_NAME: "
        OLDPID=`/usr/bin/pgrep -f $PROCESS_STRING`
        if [ "$OLDPID" != "" ]; then
            /bin/kill -TERM $OLDPID
        else
            /bin/echo "$SERVICE_NAME is stopped"
        fi
        echo
        /bin/rm -f $NodeManagerLockFile
        [ $RETVAL -eq 0 ] && rm -f $LOCKFILE

}

restart() {
        stop
        sleep 10
        start
}

case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  restart|force-reload|reload)
        restart
        ;;
  condrestart|try-restart)
        [ -f $LOCKFILE ] && restart
        ;;
  status)
        OLDPID=`/usr/bin/pgrep -f $PROCESS_STRING`
        if [ "$OLDPID" != "" ]; then
            /bin/echo "$SERVICE_NAME is running (pid: $OLDPID)"
        else
            /bin/echo "$SERVICE_NAME is stopped"
        fi
        RETVAL=$?
        ;;
  *)
        echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
        exit 1
esac

exit $RETVAL

Step-2) Save the Script Inside Directory /etc/init.d

mv nodemanager /etc/init.d/

Step-3) Issue the Command chkconfig for Script nodemanager

chkconfig --add nodemanager



 Note:-
 Default-Start: 3,4,5=on
 Default-Stop: 0,1,2,6=off

Step-4) Change Properties Values in nodemanager.properties File

        a) Navigate to NodeManager Home

            cd $DOMAIN_HOME/nodemanager   

cd  /oracle/Middleware/user_projects/domains/base_domain/nodemanager
   

        b) Open the file nodemanager.properties using the vi editor

        c) Change the value of below parameters like below & Save and Exit

             NativeVersionEnabled=true
     CrashRecoveryEnabled=true
     weblogic.StartScriptEnabled=true

Step-5) Start the NodeManager, AdminServer & Managed Server Through NodeManager 

 

        a) Starting NodeManager

         
            nohup ./startNodeManager.sh &

       b) Start AdminServer through NodeManager using WLST.

     . ./setDomainEnv.sh

     java weblogic.WLST 


nmConnect('weblogic','welcome1','test.abs.com','5556','base_domain','/oracle/Middleware/user_projects/domains/base_domain','plain')

nmStart('AdminServer')

          c) Start Managed Server using WebLogic Admin Console OR WLST.

Step-6) For Testing Purpose Restart the Linux Server & Check WebLogic Application Server Status.

    With root user issue the below command for restarting linux server.

     init 6



 Post restart access the admin console & check weblogic servers status.