elchingon · August 29, 2015 14:20
diff --git a/Ubuntu Unicorn RVM Init.d script b/Ubuntu Unicorn RVM Init.d script
 ---- find out the version of ruby and your gemset (because rvm rules)
 rvm current
 
 --- create rvm alias 
 rvm alias create app_name ruby-2.1.2@app_gemset
 
 --- set rvm wrappers (they removed no-link option and seems like all core gems are given a wrapper)
 rvm wrapper app_name unicorn_rails 
 
 --- /etc/init.d/unicorn
 
 #!/bin/sh
 
 # File: /etc/init.d/unicorn
 
 ### BEGIN INIT INFO
 # Provides:          unicorn
 # Required-Start:    $local_fs $remote_fs $network $syslog
 # Required-Stop:     $local_fs $remote_fs $network $syslog
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
 # Short-Description: starts the unicorn web server
 # Description:       starts unicorn
 ### END INIT INFO
 
 # constants
 USER=ubuntu (or whoever)
 APP_ROOT=/var/www/app_name
 RAILS_ENV=production
 PID=$APP_ROOT/pids/unicorn.pid
 DESC="Unicorn app - $RAILS_ENV"
 UNICORN="/home/e7help/.rvm/wrappers/ruby-2.1.2@app_name/unicorn_rails"
 UNICORN_OPTS="-c $APP_ROOT/config/unicorn.rb -E $RAILS_ENV -D"
 CMD="RAILS_ENV=$RAILS_ENV $UNICORN $UNICORN_OPTS"
 TIMEOUT=60
 
 
 
 # Store the action that we should take from the service command's first
 # argument (e.g. start, stop, upgrade).
 action="$1"
 
 # Make sure the script exits if any variables are unset. This is short for
 # set -o nounset.
 set -u
 
 # Set the location of the old pid. The old pid is the process that is getting
 # replaced.
 old_pid="$PID.oldbin"
 
 # Make sure the APP_ROOT is actually a folder that exists. An error message from
 # the cd command will be displayed if it fails.
 cd $APP_ROOT || exit 1
 
 # A function to send a signal to the current unicorn master process.
 sig () {
  test -s "$PID" && kill -$1 `cat $PID`
 }
 
 # Send a signal to the old process.
 oldsig () {
  test -s $old_pid && kill -$1 `cat $old_pid`
 }
 
 # A switch for handling the possible actions to take on the unicorn process.
 case $action in
  # Start the process by testing if it's there (sig 0), failing if it is,
  # otherwise running the command as specified above.
  start)
    sig 0 && echo >&2 "$DESC is already running" && exit 0
    su - $USER -c "$CMD"
    ;;
 
  # Graceful shutdown. Send QUIT signal to the process. Requests will be
  # completed before the processes are terminated.
  stop)
    sig QUIT && echo "Stopping $DESC" exit 0
    echo >&2 "Not running"
    ;;
 
  # Quick shutdown - kills all workers immediately.
  force-stop)
    sig TERM && echo "Force-stopping $DESC" && exit 0
    echo >&2 "Not running"
    ;;
 
  # Graceful shutdown and then start.
  restart)
    sig QUIT && echo "Restarting $DESC" && sleep 2 \
      && su - $USER -c "$CMD" && exit 0
    echo >&2 "Couldn't restart."
    ;;
    
    
      # Reloads config file (unicorn.rb) and gracefully restarts all workers. This
  # command won't pick up application code changes if you have `preload_app
  # true` in your unicorn.rb config file.
  reload)
    sig HUP && echo "Reloading configuration for $DESC" && exit 0
    echo >&2 "Couldn't reload configuration."
    ;;
 
  # Re-execute the running binary, then gracefully shutdown old process. This
  # command allows you to have zero-downtime deployments. The application may
  # spin for a minute, but at least the user doesn't get a 500 error page or
  # the like. Unicorn interprets the USR2 signal as a request to start a new
  # master process and phase out the old worker processes. If the upgrade fails
  # for some reason, a new process is started.
  upgrade)
    if sig USR2 && echo "Upgrading $DESC" && sleep 10 \
      && sig 0 && oldsig QUIT
    then
      n=$TIMEOUT
      while test -s $old_pid && test $n -ge 0
      do
        printf '.' && sleep 1 && n=$(( $n - 1 ))
      done
      echo
 
      if test $n -lt 0 && test -s $old_pid
      then
        echo >&2 "$old_pid still exists after $TIMEOUT seconds"
        exit 1
      fi
      exit 0
    fi
    echo >&2 "Couldn't upgrade, starting 'su - $USER -c \"$CMD\"' instead"
    su - $USER -c "$CMD"
    ;;
    
      # A basic status checker. Just checks if the master process is responding to
  # the `kill` command.
  status)
    sig 0 && echo >&2 "$DESC is running." && exit 0
    echo >&2 "$DESC is not running."
    ;;
 
  # Reopen all logs owned by the master and all workers.
  reopen-logs)
    sig USR1
    ;;
 
  # Any other action gets the usage message.
  *)
    # Usage
    echo >&2 "Usage: $0 <start|stop|restart|reload|upgrade|force-stop|reopen-logs>"
    exit 1
    ;;
 esac



 --- setup permission
 sudo chmod +x /etc/init.d/unicorn

 --- and startup
 sudo update-rc.d unicorn defaults


 --- now use it
 sudo service unicorn start|stop|restart|etc
	---- find out the version of ruby and your gemset (because rvm rules)
	rvm current

	--- create rvm alias
	rvm alias create app_name ruby-2.1.2@app_gemset

	--- set rvm wrappers (they removed no-link option and seems like all core gems are given a wrapper)
	rvm wrapper app_name unicorn_rails

	--- /etc/init.d/unicorn

	#!/bin/sh

	# File: /etc/init.d/unicorn

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

	# constants
	USER=ubuntu (or whoever)
	APP_ROOT=/var/www/app_name
	RAILS_ENV=production
	PID=$APP_ROOT/pids/unicorn.pid
	DESC="Unicorn app - $RAILS_ENV"
	UNICORN="/home/e7help/.rvm/wrappers/ruby-2.1.2@app_name/unicorn_rails"
	UNICORN_OPTS="-c $APP_ROOT/config/unicorn.rb -E $RAILS_ENV -D"
	CMD="RAILS_ENV=$RAILS_ENV $UNICORN $UNICORN_OPTS"
	TIMEOUT=60



	# Store the action that we should take from the service command's first
	# argument (e.g. start, stop, upgrade).
	action="$1"

	# Make sure the script exits if any variables are unset. This is short for
	# set -o nounset.
	set -u

	# Set the location of the old pid. The old pid is the process that is getting
	# replaced.
	old_pid="$PID.oldbin"

	# Make sure the APP_ROOT is actually a folder that exists. An error message from
	# the cd command will be displayed if it fails.
	cd $APP_ROOT \|\| exit 1

	# A function to send a signal to the current unicorn master process.
	sig () {
	test -s "$PID" && kill -$1 `cat $PID`
	}

	# Send a signal to the old process.
	oldsig () {
	test -s $old_pid && kill -$1 `cat $old_pid`
	}

	# A switch for handling the possible actions to take on the unicorn process.
	case $action in
	# Start the process by testing if it's there (sig 0), failing if it is,
	# otherwise running the command as specified above.
	start)
	sig 0 && echo >&2 "$DESC is already running" && exit 0
	su - $USER -c "$CMD"
	;;

	# Graceful shutdown. Send QUIT signal to the process. Requests will be
	# completed before the processes are terminated.
	stop)
	sig QUIT && echo "Stopping $DESC" exit 0
	echo >&2 "Not running"
	;;

	# Quick shutdown - kills all workers immediately.
	force-stop)
	sig TERM && echo "Force-stopping $DESC" && exit 0
	echo >&2 "Not running"
	;;

	# Graceful shutdown and then start.
	restart)
	sig QUIT && echo "Restarting $DESC" && sleep 2 \
	&& su - $USER -c "$CMD" && exit 0
	echo >&2 "Couldn't restart."
	;;


	# Reloads config file (unicorn.rb) and gracefully restarts all workers. This
	# command won't pick up application code changes if you have `preload_app
	# true` in your unicorn.rb config file.
	reload)
	sig HUP && echo "Reloading configuration for $DESC" && exit 0
	echo >&2 "Couldn't reload configuration."
	;;

	# Re-execute the running binary, then gracefully shutdown old process. This
	# command allows you to have zero-downtime deployments. The application may
	# spin for a minute, but at least the user doesn't get a 500 error page or
	# the like. Unicorn interprets the USR2 signal as a request to start a new
	# master process and phase out the old worker processes. If the upgrade fails
	# for some reason, a new process is started.
	upgrade)
	if sig USR2 && echo "Upgrading $DESC" && sleep 10 \
	&& sig 0 && oldsig QUIT
	then
	n=$TIMEOUT
	while test -s $old_pid && test $n -ge 0
	do
	printf '.' && sleep 1 && n=$(( $n - 1 ))
	done
	echo

	if test $n -lt 0 && test -s $old_pid
	then
	echo >&2 "$old_pid still exists after $TIMEOUT seconds"
	exit 1
	fi
	exit 0
	fi
	echo >&2 "Couldn't upgrade, starting 'su - $USER -c \"$CMD\"' instead"
	su - $USER -c "$CMD"
	;;

	# A basic status checker. Just checks if the master process is responding to
	# the `kill` command.
	status)
	sig 0 && echo >&2 "$DESC is running." && exit 0
	echo >&2 "$DESC is not running."
	;;

	# Reopen all logs owned by the master and all workers.
	reopen-logs)
	sig USR1
	;;

	# Any other action gets the usage message.
	*)
	# Usage
	echo >&2 "Usage: $0 <start\|stop\|restart\|reload\|upgrade\|force-stop\|reopen-logs>"
	exit 1
	;;
	esac



	--- setup permission
	sudo chmod +x /etc/init.d/unicorn

	--- and startup
	sudo update-rc.d unicorn defaults


	--- now use it
	sudo service unicorn start\|stop\|restart\|etc