用Chronos取代Celerybeat

Question

Chronos有多成熟？它是芹菜节拍等调度器的可行替代品吗？

现在我们的调度实现了一个定期的"心跳"任务,该任务检查"未完成"事件并在它们过期时触发它们.我们使用python-dateutil的rrule来定义它.

我们正在寻找这种方法的替代方案,而Chronos似乎是一个非常有吸引力的替代方案:1)它将减少使用心跳计划任务的必要性,2)它支持使用ISO8601格式的RESTful提交事件,3)有一个有用的接口管理,4)它的规模.

关键要求是需要从Web界面即时配置调度.这就是为什么不能使用celerybeat的内置调度开箱即用的原因.

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我们是否会通过切换到Chronos来射击自己？

Answer 1

该 SO可以解决您的动态周期性任务问题。这不是目前公认的答案：

 from djcelery.models import PeriodicTask, IntervalSchedule
 from datetime import datetime

 class TaskScheduler(models.Model):

     periodic_task = models.ForeignKey(PeriodicTask)

     @staticmethod
     def schedule_every(task_name, period, every, args=None, kwargs=None):
     """ schedules a task by name every "every" "period". So an example call would be:
          TaskScheduler('mycustomtask', 'seconds', 30, [1,2,3]) 
          that would schedule your custom task to run every 30 seconds with the arguments 1 ,2 and 3 passed to the actual task. 
     """
         permissible_periods = ['days', 'hours', 'minutes', 'seconds']
         if period not in permissible_periods:
             raise Exception('Invalid period specified')
         # create the periodic task and the interval
         ptask_name = "%s_%s" % (task_name, datetime.datetime.now()) # create some name for the period task
         interval_schedules = IntervalSchedule.objects.filter(period=period, every=every)
         if interval_schedules: # just check if interval schedules exist like that already and reuse em
             interval_schedule = interval_schedules[0]
         else: # create a brand new interval schedule
             interval_schedule = IntervalSchedule()
             interval_schedule.every = every # should check to make sure this is a positive int
             interval_schedule.period = period 
             interval_schedule.save()
         ptask = PeriodicTask(name=ptask_name, task=task_name, interval=interval_schedule)
         if args:
             ptask.args = args
         if kwargs:
             ptask.kwargs = kwargs
         ptask.save()
         return TaskScheduler.objects.create(periodic_task=ptask)

     def stop(self):
         """pauses the task"""
         ptask = self.periodic_task
         ptask.enabled = False
         ptask.save()

     def start(self):
         """starts the task"""
         ptask = self.periodic_task
         ptask.enabled = True
         ptask.save()

     def terminate(self):
         self.stop()
         ptask = self.periodic_task
         self.delete()
         ptask.delete()

我还没有使用过djcelery，但据说它有一个用于动态定期任务的管理界面。