Salt: Unicorn state file and init script

gistfile1.txt

File: init.sls
------------------------------------------

/etc/init.d/unicorn:
  file.managed:
    - order: 1
    - mode: 774
    - template: jinja
    - ENV: {{ grains['environment'] }}
    - source: salt://unicorn/unicorn_init

chkconfig --add unicorn:
  cmd:
    - order: 2
    - run

chkconfig unicorn on:
  cmd:
    - order: 3
    - run
    
    
File:unicorn_init
-----------------------------------
#!/bin/sh
### BEGIN INIT INFO
# Provides:          unicorn
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Manage unicorn server
# Description:       Start, stop, restart unicorn server for a specific application.
### END INIT INFO
set -e

# Feel free to change any of the following variables for your app:
TIMEOUT=60
APP_ROOT=/var/www/domains/FOOBAR.com/FOOBARApp/current
PID=/var/www/domains/FOOBAR.com/FOOBARApp/current/tmp/pids/unicorn.pid
PATH=$PATH:/usr/local/rbenv/shims:/usr/local/rbenv/bin
CMD="cd /var/www/domains/FOOBAR.com/FOOBARApp/current; bundle exec unicorn_rails -D -c /var/www/domains/FOOBAR.com/FOOBARApp/shared/unicorn/unicorn.rb -E {{ENV}}"
AS_USER=deploy
set -u

OLD_PIN="$PID.oldbin"

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

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

run () {
 if [ "$(id -un)" = "$AS_USER" ]; then
   eval $1
   else
   su -c "$1" - $AS_USER
 fi
}

case "$1" in
start)
 sig 0 && echo >&2 "Already running" && exit 0
 run "$CMD"
 ;;
stop)
 sig QUIT && exit 0
 echo >&2 "Not running"
 ;;
force-stop)
 sig TERM && exit 0
 echo >&2 "Not running"
 ;;
restart|reload)
 sig USR2 && echo reloaded OK && exit 0
 echo >&2 "Couldn't reload, starting '$CMD' instead"
 run "$CMD"
 ;;
upgrade)
 if sig USR2 && sleep 2 && sig 0 && oldsig QUIT
 then
   n=$TIMEOUT
   while test -s $OLD_PIN && test $n -ge 0
   do
     printf '.' && sleep 1 && n=$(( $n - 1 ))
   done
   echo

   if test $n -lt 0 && test -s $OLD_PIN
   then
     echo >&2 "$OLD_PIN still exists after $TIMEOUT seconds"
     exit 1
   fi
   exit 0
 fi
 echo >&2 "Couldn't upgrade, starting '$CMD' instead"
 run "$CMD"
 ;;
reopen-logs)
 sig USR1
 ;;
*)
 echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
 exit 1
 ;;
esac