centos-init-script.sh

#!/bin/bash
# myapp daemon
# chkconfig: 345 20 80
# description: myapp daemon
# processname: myapp
# author: daithi-coombes
# original http://werxltd.com/wp/2012/01/05/simple-init-d-script-template/

DAEMON_PATH="/path/to/myapp"

DAEMON=app.rb
DAEMONOPTS="-o 0.0.0.0 -p 8081"

NAME=geoportal
DESC="My daemon description"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

case "$1" in
start)
        printf "%-50s" "Starting $NAME..."

        # setup
        source /etc/profile.d/rvm.sh
        cd $DAEMON_PATH
        rvm use ext-ruby-2.2.3-p173

        # run
        PID=`./$DAEMON $DAEMONOPTS > /var/log/myapp.log 2>&1 & echo $!`

        # status
        until fgrep -q "output status ok" /var/log/myapp.log; do sleep 1; done
        echo "Saving PID" $PID " to " $PIDFILE
        if [ -z $PID ]; then
            printf "%s\n" "Fail"
        else
            echo $PID > $PIDFILE
            printf "%s\n" "Ok"
        fi
;;
status)
        printf "%-50s" "Checking $NAME..."
        if [ -f $PIDFILE ]; then
            PID=`cat $PIDFILE`
            if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then
                printf "%s\n" "Process dead but pidfile exists"
            else
                echo "Running"
            fi
        else
            printf "%s\n" "Service not running"
        fi
;;
stop)
        printf "%-50s" "Stopping $NAME"
            PID=`cat $PIDFILE`
            cd $DAEMON_PATH
            echo "killing $PID"
        if [ -f $PIDFILE ]; then
            kill $PID
            printf "%s\n" "Ok"
            rm -f $PIDFILE
        else
            printf "%s\n" "pidfile not found"
        fi
;;

restart)
        $0 stop
        $0 start
;;

*)
        echo "Usage: $0 {status|start|stop|restart}"
        exit 1
esac