Startup Unix script for Gunicorn server.

gunicorn_startup.sh

#!/bin/sh
#
# /etc/init.d/gunicorn
#
# Startup script for Gunicorn server.
#
# Author: Tim Fletcher (2011)
#         Modified by Mariano Ruiz <mrsarm@gmail.com> (2013)
#
# Original source:
#   https://gist.github.com/TimFletcher/1159189
# This source:
#   https://gist.github.com/mrsarm/5460996
#

### BEGIN INIT INFO
# Provides: gunicorn
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 5
# Default-Stop:  0 1 6
# Short-Description: Startup script for Gunicorn server.
### END INIT INFO


# Install this service with:
#   insserv -d gunicorn                                     -> SUSE
#   update-rc.d gunicorn defaults                           -> Debian
#   update-rc.d gunicorn start 20 2 3 5 . stop 20 0 1 6 .   -> Debian
#   chkconfig --level 235 gunicorn on                       -> Other distros
#
# Uninstall this service with:
#   insserv -r gunicorn                                     -> SUSE
#   update-rc.d -f gunicorn remove                          -> Debian
#   chkconfig --level 235 gunicorn off                      -> Other distros


ADDRESS='0.0.0.0'
GUNICORN="gunicorn_django"
PROJECTLOC="/opt/django-zoook/django_zoook"
MANAGELOC="$PROJECTLOC/manage.py"
USER=$USER
DEFAULT_ARGS="--workers=4 --daemon --user=$USER --bind=$ADDRESS:"
BASE_CMD="$GUNICORN $DEFAULT_ARGS"

SERVER1_PORT='8000'
SERVER1_PID="$PROJECTLOC/$SERVER1_PORT.pid"
SERVER2_PORT='8001'
SERVER2_PID="$PROJECTLOC/$SERVER2_PORT.pid"

start_server () {
  if [ -f $1 ]; then
    #pid exists, check if running
    if [ "$(ps -p `cat $1` | wc -l)" -gt 1 ]; then
       echo "Server already running on ${ADDRESS}:${2}"
       return
    fi
  fi
  echo "Starting Gunicorn server ${ADDRESS}:${2}"
  cd $PROJECTLOC
  $BASE_CMD$2 --pid=$1
}

stop_server () {
  if [ -f $1 ] && [ "$(ps -p `cat $1` | wc -l)" -gt 1 ]; then
    echo "Stopping Gunicorn server ${ADDRESS}:${2}"
    kill -9 `cat $1`
    rm $1
  else 
    if [ -f $1 ]; then
      echo "Gunicorn server ${ADDRESS}:${2} not running"
    else
      echo "No pid file found for Gunicorn server ${ADDRESS}:${2}"
    fi
  fi
}

status_server () {
  if [ -f $1 ]; then
    #pid exists, check if running
    if [ "$(ps -p `cat $1` | wc -l)" -gt 1 ]; then
      echo "Gunicorn server already running on ${ADDRESS}:${2}"
      return
    fi
  fi
  echo "Gunicorn server ${ADDRESS}:${2} not running" 
}

case "$1" in
'start')
  start_server $SERVER1_PID $SERVER1_PORT
  start_server $SERVER2_PID $SERVER2_PORT
  ;;
'stop')
  stop_server $SERVER1_PID $SERVER1_PORT
  stop_server $SERVER2_PID $SERVER2_PORT
  ;;
'restart')
  stop_server $SERVER1_PID $SERVER1_PORT
  sleep 2
  start_server $SERVER1_PID $SERVER1_PORT
  sleep 2
  stop_server $SERVER2_PID $SERVER2_PORT
  sleep 2
  start_server $SERVER2_PID $SERVER2_PORT
  ;;
'status')
  status_server $SERVER1_PID $SERVER1_PORT
  ;;
*)
  echo "Usage: $0 {start|stop|restart|status}"
  ;;
esac

exit 0