Simple startup file for individual [Puma](http://puma.io) apps on RHEL/CentOS (tested on 6.x). Just the bare minumum needed, really. Do not call it puma.sh but place a copy in for each of your puma applications. (It relies on its own name to work) By renaming it you can have as many different apps (on separate ports) as you require. You'll need …

puma.sh

#!/bin/sh
#
# Puma control script
#
# chkconfig: - 80 20
# description: Puma

# Create an /etc/sysconfig/file of the same name as this with the following settings
# Note this code does NOT pick any defaults, so will fall over if these are unset.
# RACK_ENV=production
# RACKINIT_USER=<user>
# RACKINIT_DIRECTORY=<Folder containing config.ru>
# RACKINIT_PORT=<Port number. 9292 is traditional>
# RACKINIT_THREADS=<Puma expects something like 0:16 for min:max threads>

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

prog=$(basename $(readlink -f $0))

# Load configuration.
[ -r /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
export RACK_ENV

# Config not there? Exit
if [ -z "$RACKINIT_DIRECTORY" ]; then
  exit 6
fi

CMD_PREFIX=''

if [ ! -z "$RACKINIT_USER" ]; then
  if [ -x /etc/rc.d/init.d/functions ]; then
    CMD_PREFIX="daemon --user $RACKINIT_USER"
  else
    CMD_PREFIX="su - $RACKINIT_USER -c"
  fi
fi

start() {
  echo -n "Starting $prog: "
  if [ ! -z "$RACKINIT_USER" ]; then
    if [ -x /etc/rc.d/init.d/functions ]; then
      daemon --user $RACKINIT_USER "cd $RACKINIT_DIRECTORY && bundle exec rackup -p $RACKINIT_PORT -O Threads=$RACKINIT_THREADS config.ru"&
    else
      su - $RACKINIT_USER -c "cd $RACKINIT_DIRECTORY && bundle exec rackup -p $RACKINIT_PORT -O Threads=$RACKINIT_THREADS config.ru" 2>&1 > /dev/null &
    fi
  fi
  success
  echo
  return 0
}

stop() {
  echo -n $"Stopping $prog: "
  count=0;

  fuser -k -n tcp $RACKINIT_PORT
  success
  echo
}


case "$1" in
  start)
      start
      ;;
  stop)
      stop
      ;;
  restart)
      $0 stop
      $0 start
      ;;
  *)
      ## If no parameters are given, print which are avaiable.
      echo "Usage: $0 {start|stop|restart}"
      exit 1
      ;;
esac