如何跟踪芹菜的重试情况

问题描述

在芹菜中，如何跟踪当前重试？我知道我可以这样做：

@app.task(bind=True, default_retry_delay=900, max_retries=5)
def send_email(self, sender=None, to=None, subject=None, message=None):
  try:
    # Send email
  except Exception as e:
    # Print log message with current retry
    self.retry(e)

但我想说这是尝试1/5.2/5等等。

---

解决方案

当前重试次数可以在任务的request.retries属性上找到。

@app.task(retries=3, default_retry_delay=1)
def fail():
    try:
        assert False
    except Exception as e:
      print 'Try {0}/{1}'.format(fail.request.retries, fail.max_retries)
      # Print log message with current retry
      raise fail.retry(exc=e)


[2015-01-14 15:15:55,702: WARNING/Worker-1] Try 0/3
[2015-01-14 15:15:58,604: WARNING/Worker-3] Try 1/3
[2015-01-14 15:16:00,605: WARNING/Worker-2] Try 2/3
[2015-01-14 15:16:02,607: WARNING/Worker-6] Try 3/3
      

芹菜内部使用类似的方法：https://github.com/celery/celery/blob/b0cfa0d818743262a032c541cce2fa8c43fabad4/celery/app/task.py#L558