examples/init.sh

   1 #!/bin/sh
   2 set -e
   3 # Example init script, this can be used with nginx, too,
   4 # since nginx and unicorn accept the same signals
   5
   6 # Feel free to change any of the following variables for your app:
   7 TIMEOUT=${TIMEOUT-60}
   8 APP_ROOT=/home/x/my_app/current
   9 PID=$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 action="$1"
  13 set -u
  14
  15 test -f "$INIT_CONF" && . $INIT_CONF
  16
  17 old_pid="$PID.oldbin"
  18
  19 cd $APP_ROOT || exit 1
  20
  21 sig () {
  22         test -s "$PID" && kill -$1 `cat $PID`
  23 }
  24
  25 oldsig () {
  26         test -s $old_pid && kill -$1 `cat $old_pid`
  27 }
  28
  29 case $action in
  30 start)
  31         sig 0 && echo >&2 "Already running" && exit 0
  32         $CMD
  33         ;;
  34 stop)
  35         sig QUIT && exit 0
  36         echo >&2 "Not running"
  37         ;;
  38 force-stop)
  39         sig TERM && exit 0
  40         echo >&2 "Not running"
  41         ;;
  42 restart|reload)
  43         sig HUP && echo reloaded OK && exit 0
  44         echo >&2 "Couldn't reload, starting '$CMD' instead"
  45         $CMD
  46         ;;
  47 upgrade)
  48         if sig USR2 && sleep 2 && sig 0 && oldsig QUIT
  49         then
  50                 n=$TIMEOUT
  51                 while test -s $old_pid && test $n -ge 0
  52                 do
  53                         printf '.' && sleep 1 && n=$(( $n - 1 ))
  54                 done
  55                 echo
  56
  57                 if test $n -lt 0 && test -s $old_pid
  58                 then
  59                         echo >&2 "$old_pid still exists after $TIMEOUT seconds"
  60                         exit 1
  61                 fi
  62                 exit 0
  63         fi
  64         echo >&2 "Couldn't upgrade, starting '$CMD' instead"
  65         $CMD
  66         ;;
  67 reopen-logs)
  68         sig USR1
  69         ;;
  70 *)
  71         echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
  72         exit 1
  73         ;;
  74 esac