Example of hadoop bash init.d

hadoop.sh

#!/bin/bash
#
#
# Starts a Hadoop Master
#
# chkconfig: 2345 90 10
# description: Hadoop master
 
. /etc/rc.d/init.d/functions
. /opt/hadoop/conf/hadoop-env.sh
export HPATH=/opt/hadoop
export HLOCK=/var/lock/subsys
 
RETVAL=0
PIDFILE=$HLOCK/hadoop-hdfs-master.pid
desc="Hadoop Master daemon"
 
start() {
  echo -n $"Starting $desc (hadoop): "
  daemon --user root $HPATH/bin/start-all.sh $1
  RETVAL=$?
  echo
  [ $RETVAL -eq 0 ] && touch $HLOCK/hadoop-master
  return $RETVAL
}
 
stop() {
  echo -n $"Stopping $desc (hadoop): "
  daemon --user root $HPATH/bin/stop-all.sh
  RETVAL=$?
  sleep 5
  echo
  [ $RETVAL -eq 0 ] && rm -f $HLOCK/hadoop-master $PIDFILE
}
 
checkstatus(){
  jps |grep NameNode
}
 
restart() {
  stop
  start
}
 
format() {
  daemon --user root $HPATH/bin/hadoop master -format
}
 
case "$1" in
  start)
    start
    ;;
  upgrade)
    upgrade
    ;;
  format)
    format
    ;;
  stop)
    stop
    ;;
  status)
    checkstatus
    ;;
  restart)
    restart
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|restart|try-restart}"
    exit 1
esac
 
exit $RETVAL