Unicorn init.d Script

unicorn

#!/bin/sh

set -e

# Setup current directory path
APP_ROOT=/path/to/your/app/current

# Unicorn needs to know to write the PID file here.  Adjust this for your own setup.
PID=$APP_ROOT/tmp/pids/unicorn.pid

# GCC settings for Ruby Enterprise Edition
export RUBY_HEAP_MIN_SLOTS=700000
export RUBY_HEAP_FREE_MIN=100000
export RUBY_HEAP_SLOTS_INCREMENT=250000
export RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
export RUBY_GC_MALLOC_LIMIT=50000000

# Go directly to the unicorn_rails path to avoid loading RVM in this script
# For Rails 3 and above, unicorn_rails is not necessary... you can just use unicorn
CMD="/usr/local/rvm/gems/ree-1.8.7-2010.02/bin/unicorn_rails -E production -D -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
	$CMD
	;;
stop)
	sig QUIT && exit 0
	echo >&2 "Not running"
	;;
force-stop)
	sig TERM && exit 0
	echo >&2 "Not running"
	;;
restart|reload)
	sig HUP && echo reloaded OK && exit 0
	echo >&2 "Couldn't reload, starting '$CMD' instead"
	$CMD
	;;
upgrade)
	sig USR2 && sleep 2 && exit 0
	echo >&2 "Couldn't upgrade, starting '$CMD' instead"
	$CMD
	;;
*)
	echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop>"
	exit 1
	;;
esac