etc-init.d-cassandra

#!/bin/bash
# init script for Cassandra.
# chkconfig: 2345 90 10
# description: Cassandra
# script slightly modified from 
# http://blog.milford.io/2010/06/installing-apache-cassandra-on-centos/
 
. /etc/rc.d/init.d/functions

 
CASS_HOME=/opt/cassandra
CASS_BIN=$CASS_HOME/bin/cassandra
CASS_LOG=/var/log/cassandra/system.log
CASS_USER="cassandra"
CASS_PID=/var/run/cassandra/cassandra.pid
 
if [ ! -f $CASS_BIN ]; then
	echo "File not found: $CASS_BIN"
	exit 1
fi
 
RETVAL=0

prog=`basename $0`
 
start() {
	if [ -f $CASS_PID ] && checkpid `cat $CASS_PID`; then
		echo "Cassandra is already running."
		exit 0
	fi
	touch $CASS_LOG
	chown $CASS_USER $CASS_LOG
	echo -n $"Starting $prog: "
	daemon --user $CASS_USER $CASS_BIN -p $CASS_PID >> $CASS_LOG 2>&1
	usleep 500000
	RETVAL=$?
	if [ "$RETVAL" = "0" ]; then
		echo_success
	else
		echo_failure
	fi
	echo
	return $RETVAL
}
 
stop() {
	# check if the process is already stopped by seeing if the pid file exists.
	if [ ! -f $CASS_PID ]; then
		RETVAL=1
		echo_failure
	else
		echo -n $"Stopping $prog: "
		pid=`cat $CASS_PID`
		if kill $pid; then
			while [ -e /proc/$pid ]; do
				echo -n "."
				sleep 1
			done
			RETVAL=0
			echo_success
		else
			RETVAL=1
			echo_failure
		fi
		echo
		[ $RETVAL = 0 ]
	fi
}
 
status_fn() {
	if [ -f $CASS_PID ] && checkpid `cat $CASS_PID`; then
		echo "Cassandra is running."
		exit 0
	else
		echo "Cassandra is stopped."
		exit 1
	fi
}
 
case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	status)
		status_fn
		;;
	restart)
		stop
		start
		;;
	*)
		echo $"Usage: $prog {start|stop|restart|status}"
		RETVAL=3
esac
 
exit $RETVAL