unicorn.init.erb

#!/bin/sh
# /etc/init.d/unicorn
# To install: update-rc.d unicorn defaults
# @version 2011-07-29
# @author Adam Dunson

### BEGIN INIT INFO
# Provides:   unicorn
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Should-Start:   $network
# Should-Stop:    $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:    Unicorn server
# Description:    Starts the unicorn server
### END INIT INFO

set -u
set -e
# Example init script, this can be used with nginx, too,
# since nginx and unicorn accept the same signals

# Feel free to change any of the following variables for your app:
APP_ROOT=<%=@rails_root%>/current
PID=<%=@rails_root%>/shared/tmp/pids/unicorn.pid
ENV=<%=@environment%>
CMD="/usr/local/bin/bundle exec /usr/local/bin/unicorn_rails -D -E $ENV -c $APP_ROOT/config/unicorn.rb"
old_pid="$PID.oldbin"

cd $APP_ROOT || exit 1

sig () {
  test -s "$PID" && kill -$1 `cat $PID`
}

oldsig () {
  test -s $old_pid && kill -$1 `cat $old_pid`
}

case $1 in
start)
  sig 0 && echo >&2 "Already running" && exit 0
  cd $APP_ROOT
  $CMD
  ;;
stop)
  sig QUIT && exit 0
  echo >&2 "Not running"
  ;;
force-stop)
  sig TERM && exit 0
  echo >&2 "Not running"
  ;;
restart|reload)
  sig HUP && echo reloaded OK && exit 0
  echo >&2 "Couldn't reload, starting '$CMD' instead"
  $CMD
  ;;
status)
  test -s "$PID" && test -d "/proc/`cat $PID`" && echo running && exit 0
  echo stopped && exit 3
  ;;
upgrade)
  sig USR2 && exit 0
  echo >&2 "Couldn't upgrade, starting '$CMD' instead"
  $CMD
  ;;
rotate)
        sig USR1 && echo rotated logs OK && exit 0
        echo >&2 "Couldn't rotate logs" && exit 1
        ;;
*)
  echo >&2 "Usage: $0 <start|stop|restart|upgrade|rotate|force-stop>"
  exit 1
  ;;
esac