forever-initd-example.sh

#!/bin/bash
#
# chkconfig: - 55 45
# init.d example for Forever & Node
#
# modeled after
# https://gist.github.com/jinze/3748766
#
# supports vhost
#
# pidfile: /var/run/nodejs/initd-example.pid
# logfile: /var/log/nodejs/initd-example.log

# Source function library.
. /etc/init.d/functions

NAME=feeds-process            # Unique name for the application
NODE_ENV=production           # Node environment
PORT=3000                     # Port (in this case the application uses process.env.PORT to set the port)
SOURCE_NAME=app.js            # Name os the applcation entry point script

USER=nodejs
INSTANCE_DIR=/var/www/$NAME   # Location of the application source
COMMAND=node                  # Command to run

PID_DIR=/var/run/nodejs
PIDFILE=$PID_DIR/$NAME.pid
LOG_DIR=/var/log/nodejs
LOGFILE=$LOG_DIR/$NAME.log
FOREVER_DIR=/var/run/forever  # Forever root directory.

NODE=node
FOREVER=/usr/bin/forever
AWK=awk
SED=sed

start() {
   echo "Starting $NAME node instance: "

   if [ "$FOREVER_ID" = "" ]; then

       # Create the log and pid files, making sure that the target use has access to them
       mkdir -p $PID_DIR
       chown $USER $PID_DIR

       mkdir -p $LOG_DIR
       chown $USER $LOG_DIR

       touch $LOGFILE
       chown $USER $LOGFILE

       touch $PIDFILE
       chown $USER $PIDFILE

       # Launch the application
       daemon $FOREVER start -p $FOREVER_DIR --pidFile $PIDFILE -l $LOGFILE -a --sourceDir $INSTANCE_DIR -c $COMMAND $SOURCE_NAME
       RETVAL=$?
   else
       echo "Instance already running"
       RETVAL=0
   fi
}

restart() {
   echo -n "Restarting $NAME node instance : "
   if [ "$FOREVER_ID" != "" ]; then
       $FOREVER restart -p $FOREVER_DIR $FOREVER_ID
       RETVAL=$?
   else
       start
   fi
}

stop() {
   echo -n "Shutting down $NAME node instance : "
   if [ "$FOREVER_ID" != "" ]; then
       $FOREVER stop -p $FOREVER_DIR $FOREVER_ID
   else
       echo "Instance is not running";
   fi
   RETVAL=$?
}

getForeverId() {
   # local PID=$(pidofproc -p $PIDFILE)
   read PID < $PIDFILE
   #$FOREVER list -p $FOREVER_DIR | $SED -e 's/\x1b\[[0-9; ]*m//g' | $AWK "\$6 && \$6 == \"$pid\" { gsub(/[\[\]]/, \"\", \$2); print \$2; }";
   $FOREVER list | grep $PID | $AWK "\$7 && \$7 == \"$PID\" { gsub(/[\[\]]/, \"\", \$2); print \$2; }"
}

if [ -f $PIDFILE ]; then
 FOREVER_ID=$(getForeverId)
 #echo ID: $FOREVER_ID
else
 FOREVER_ID=''
fi

case "$1" in
   start)
       start
       ;;
   stop)
       stop
       ;;
   status)
       status -p ${PIDFILE}
       ;;
   restart)
       restart
       ;;
   *)
       echo "Usage:  {start|stop|status|restart}"
       exit 1
       ;;
esac
exit $RETVAL