Celery计划任务中的Print语句不会出现在终端中

Question

当我跑步时,celery -A tasks2.celery worker -B我希望每秒都能看到"芹菜任务".目前没有打印.为什么这不起作用？

from app import app
from celery import Celery
from datetime import timedelta

celery = Celery(app.name, broker='amqp://guest:@localhost/', backend='amqp://guest:@localhost/')
celery.conf.update(CELERY_TASK_RESULT_EXPIRES=3600,)

@celery.task
def add(x, y):
    print "celery task"
    return x + y

CELERYBEAT_SCHEDULE = {
    'add-every-30-seconds': {
        'task': 'tasks2.add',
        'schedule': timedelta(seconds=1),
        'args': (16, 16)
    },
}

这是盯着工人并击败后的唯一输出:

[tasks]
  . tasks2.add

[INFO/Beat] beat: Starting...
[INFO/MainProcess] Connected to amqp://guest:**@127.0.0.1:5672//
[INFO/MainProcess] mingle: searching for neighbors
[INFO/MainProcess] mingle: all alone

Answer 1

您编写了计划,但没有将其添加到celery配置中.所以beat看不到任何计划任务要发送.下面的示例用于celery.config_from_object(__name__)从当前模块中获取配置值,但您也可以使用任何其他配置方法.

正确配置后,您将看到来自节拍的有关发送计划任务的消息,以及工作人员接收和运行这些任务时的输出.

from celery import Celery
from datetime import timedelta

celery = Celery(__name__)
celery.config_from_object(__name__)

@celery.task
def say_hello():
    print('Hello, World!')

CELERYBEAT_SCHEDULE = {
    'every-second': {
        'task': 'example.say_hello',
        'schedule': timedelta(seconds=5),
    },
}

$ celery -A example.celery worker -B -l info

[tasks]
  . example.say_hello

[2015-07-15 08:23:54,350: INFO/Beat] beat: Starting...
[2015-07-15 08:23:54,366: INFO/MainProcess] Connected to amqp://guest:**@127.0.0.1:5672//
[2015-07-15 08:23:54,377: INFO/MainProcess] mingle: searching for neighbors
[2015-07-15 08:23:55,385: INFO/MainProcess] mingle: all alone
[2015-07-15 08:23:55,411: WARNING/MainProcess] celery@netsec-ast-15 ready.
[2015-07-15 08:23:59,471: INFO/Beat] Scheduler: Sending due task every-second (example.say_hello)
[2015-07-15 08:23:59,481: INFO/MainProcess] Received task: example.say_hello[2a9d31cb-fe11-47c8-9aa2-51690d47c007]
[2015-07-15 08:23:59,483: WARNING/Worker-3] Hello, World!
[2015-07-15 08:23:59,484: INFO/MainProcess] Task example.say_hello[2a9d31cb-fe11-47c8-9aa2-51690d47c007] succeeded in 0.0012782540870830417s: None

Answer 2

在 4.1.0 版本中，您必须像这样添加logger到您的task.py文件中：

from celery.utils.log import get_task_logger

logger = get_task_logger(__name__)


@task(name="multiply_two_numbers")
def mul(x, y):
    total = x * (y * random.randint(3, 100))
    #HERE:
    logger.info('Adding {0} + {1}'.format(x, y))
    return total

如果您想了解更多信息，请在此处的文档中说明：http : //docs.celeryproject.org/en/latest/userguide/tasks.html

Answer 3

实际上，我在命令提示符下打印我的内容时遇到了问题，因为我使用了错误的命令，但我找到了一个指向我分叉项目的项目的链接

• （如果在 Mac 上）celery -A Project worker --loglevel=info
• （如果在 Windows 上）celery -A Project worker -l info --pool=solo