examples/init.sh

   1 #!/bin/sh
   2 set -u
   3 set -e
   4 # Example init script, this can be used with nginx, too,
   5 # since nginx and unicorn accept the same signals
   6
   7 # Feel free to change any of the following variables for your app:
   8 APP_ROOT=/home/x/my_app/current
   9 PID=$APP_ROOT/tmp/pids/unicorn.pid
  10 CMD="/usr/bin/unicorn -D -c $APP_ROOT/config/unicorn.rb"
  11 INIT_CONF=$APP_ROOT/config/init.conf
  12
  13 test -f "$INIT_CONF" && . $INIT_CONF
  14
  15 old_pid="$PID.oldbin"
  16
  17 cd $APP_ROOT || exit 1
  18
  19 sig () {
  20         test -s "$PID" && kill -$1 `cat $PID`
  21 }
  22
  23 oldsig () {
  24         test -s $old_pid && kill -$1 `cat $old_pid`
  25 }
  26
  27 case $1 in
  28 start)
  29         sig 0 && echo >&2 "Already running" && exit 0
  30         $CMD
  31         ;;
  32 stop)
  33         sig QUIT && exit 0
  34         echo >&2 "Not running"
  35         ;;
  36 force-stop)
  37         sig TERM && exit 0
  38         echo >&2 "Not running"
  39         ;;
  40 restart|reload)
  41         sig HUP && echo reloaded OK && exit 0
  42         echo >&2 "Couldn't reload, starting '$CMD' instead"
  43         $CMD
  44         ;;
  45 upgrade)
  46         sig USR2 && sleep 2 && sig 0 && oldsig QUIT && exit 0
  47         echo >&2 "Couldn't upgrade, starting '$CMD' instead"
  48         $CMD
  49         ;;
  50 *)
  51         echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop>"
  52         exit 1
  53         ;;
  54 esac