如何跟踪芹菜中的重试次数

Question

在芹菜中，如何跟踪当前的重试？我知道我可以做这样的事情：

@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。

Answer 1

可以在任务的 request.retries 属性上找到当前重试次数。

@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
      

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

Answer 2

使用 self 。

https://docs.celeryq.dev/en/v5.2.3/userguide/tasks.html?highlight=self.request#example

@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
    print('Try {0}/{1}'.format(self.request.retries, self.max_retries))
    self.retry(e)