Deploy java API as service in linux CentOS 6

For sample i use uereka microservices

1. Create user for running API
   
   

   # useradd api # passwd api

   
   
2. login as api create directory eureka for put jar file, copy jar file to /home/api/eureka
   
   

   # mkdir eureka

   
   
3. Create script wrapper for system V init in /home/api/eureka
   
   

   #!/bin/sh ### BEGIN INIT INFO # chkconfig: 345 98 01 # description: Startup Script for Eureka API # Provides:          Eureka ### END INIT INFO SCRIPT="nohup java -jar -DSpring.profiles.active=cloud1 /home/api/eureka/eureka-service.jar" RUNAS=api PIDFILE=/home/api/eureka/eureka-api.pid LOGFILE=/home/api/eureka/eureka-api.log start() {   if [ -f $PIDFILE ] && [ -s $PIDFILE ] && kill -0 $(cat $PIDFILE); then     echo 'Eureka already running' >&2     return 1   fi   cd /home/api/eureka   echo 'Starting service… Eureka' >&2   local CMD="$SCRIPT &> \"$LOGFILE\" & echo \$!"   su -c "$CMD" $RUNAS > "$PIDFILE"        # Try with this command line instead of above if not workable   # su -s /bin/sh $RUNAS -c "$CMD" > "$PIDFILE"   # or   # nohup java -jar -DSpring.profiles.active=cloud1 /home/api/eureka/eureka.jar &> /home/api/eureka/eureka-api.log & echo $! > $PIDFILE   PID=$(cat $PIDFILE)     if pgrep -u $RUNAS -f eureka-service.jar > /dev/null     then       echo "API Eureka is now running, the PID is $PID"     else       echo ''       echo "Error! Could not start Eureka !"     fi }    stop() {   if [ ! -f "$PIDFILE" ] || ! kill -0 $(cat "$PIDFILE"); then     echo 'Service Eureka not running' >&2     return 1   fi   echo 'Stopping service…' >&2   kill -15 $(cat "$PIDFILE") && rm -f "$PIDFILE"   echo 'Service Eureka stopped' >&2 }    uninstall() {   echo -n "Are you really sure you want to uninstall this service? That cannot be undone. [yes|No] "   local SURE   read SURE   if [ "$SURE" = "yes" ]; then     stop     rm -f "$PIDFILE"     echo "Notice: log file was not removed: $LOGFILE" >&2     update-rc.d -f eureka remove     rm -fv "$0"   fi }    status() {     printf "%-50s" "Checking Eureka ..."     if [ -f $PIDFILE ] && [ -s $PIDFILE ]; then        PID=$(cat $PIDFILE)             if [ -z "$(ps axf | grep ${PID} | grep -v grep)" ]; then                 printf "%s\n" "The process appears to be dead but pidfile still exists"             else                   echo "Running, the PID is $PID"             fi     else         printf "%s\n" "Service Eureka not running"     fi }       case "$1" in   start)     start     ;;   stop)     stop     ;;   status)     status     ;;   uninstall)     uninstall     ;;   restart)     stop     start     ;;   *)     echo "Usage: $0 {start|stop|status|restart|uninstall}" esac

   
   
4. Enable service in system V and start eureka
   
   

   # sudo ln -s /home/api/eureka/eureka /etc/init.d/eureka # sudo chkconfig --add eureka # sudo chkconfig eureka on # sudo service eureka start

   
   
5. Firewall
   
   

   # iptables -I INPUT -p tcp --destination-port 8761 -j ACCEPT # service iptables save