There is a monitor.py can be used in Apache + mod_wsgi deployment, which can be used to auto reload wsgi processes when there is any change under Django project directory. I saw there are many way to achieve the same target in nginx + uWSGI deployment, like uwsgi.reload(), set "–py-autoreload=N" option. Finally I choose to use inotify to monitory the .py file changes under project dir, and touch the project dir to notify uWSIG reload python modules in workers.

• Add touch-reload option in project ini file

  touch-reload=/home/<username>/%(project)

• install pyinotify package

  (test) [ryan@localhost proj]$ pip install pyinotify

• create a mon_uwsgi.py file as following:

  #!/usr/bin/env python
  import signal
  import pyinotify
  import sys
  import os
  
  PID_FILE = '/tmp/mon_uwsgi.pid'
  LOG_FILE = '/tmp/mon_uwsgi.log'
  
  def handleExit(signum, stack):
      try:
          os.remove(PID_FILE)
          os.remove(LOG_FILE)
      except:
          sys.exit(1)
  
      sys.exit(0)
  
  class TouchEventHandler(pyinotify.ProcessEvent):
      def my_init(self, target):
          self.target = target
  
      def __pflush(self, str):
          sys.stdout.write(str+"n")
          sys.stdout.flush()
  
      def __touch_target(self):
          try:
              if os.path.exists(self.target):
                  os.utime(self.target, None)
                  self.__pflush("Successfully touch existed target:%s!" % self.target)
              else:
                  open(self.target, 'a').close()
                  self.__pflush("Successfully touch new target:%s!" % self.target)
          except Exception,e:
              self.__pflush("Failed to touch target because of:%s!" % self.target)
              return False
  
          return True
  
  def process_default(self, event):
      if not event.name.endswith(".py"):
          return
  
      self.__touch_target()
  
  def monitor(target):
      if not os.path.exists(target):
          print "Monitor Path: %s doens't exist!" % target
          sys.exit(1)
  
      signal.signal(signal.SIGINT, handleExit)
      signal.signal(signal.SIGQUIT, handleExit)
      signal.signal(signal.SIGTERM, handleExit)
  
      event_handler = TouchEventHandler(target=target)
      wm = pyinotify.WatchManager()
      notifier = pyinotify.Notifier(wm, default_proc_fun=event_handler)
      flags = pyinotify.IN_CREATE | pyinotify.IN_DELETE | pyinotify.IN_MODIFY | pyinotify.IN_MOVED_TO
      wm.add_watch(target, flags, rec=True, auto_add=True)
  
      try:
          notifier.loop(daemonize=True, pid_file=PID_FILE, stdout=LOG_FILE)
      except pyinotify.NotifierError, err:
          raise err
  
  if __name__ == "__main__":
      if len(sys.argv) < 2:
          print "python mon_wsgi.py <project path>"
          sys.exit(1)
  
      target_path = os.path.abspath(sys.argv[1])
      print "Monitor for path: %s started, all changes under the dir will cause uWSGI reload!" % target_path
      monitor(target_path)

Reference:

• The Art Of Graceful Reloading of uWSGI