python - Celery/RabbitMQ/Django 没有运行任务

Question

我希望有人能帮助我，因为我查看了 Stack Overflow 却找不到解决我问题的方法。我正在运行一个 Django 项目并安装了 Supervisor、RabbitMQ 和 Celery。 RabbitMQ 启动并运行，Supervisor 确保我的 celerybeat 正在运行，但是，虽然它记录节拍已启动并每 5 分钟发送一次任务(见下文)，但任务从未真正执行:

我的主管程序配置文件:

[program:nrv_twitter]
; Set full path to celery program if using virtualenv
command=/Users/tsantor/.virtualenvs/nrv_env/bin/celery beat -A app --loglevel=INFO --pidfile=/tmp/nrv-celerybeat.pid --schedule=/tmp/nrv-celerybeat-schedule

; Project dir
directory=/Users/tsantor/Projects/NRV/nrv

; Logs
stdout_logfile=/Users/tsantor/Projects/NRV/nrv/logs/celerybeat_twitter.log
redirect_stderr=true

autorestart=true
autostart=true
startsecs=10
user=tsantor

; if rabbitmq is supervised, set its priority higher so it starts first
priority=999

这是上面程序的日志输出:

[2014-12-16 20:29:42,293: INFO/MainProcess] beat: Starting...
[2014-12-16 20:34:08,161: INFO/MainProcess] Scheduler: Sending due task gettweets-every-5-mins (twitter.tasks.get_tweets)
[2014-12-16 20:39:08,186: INFO/MainProcess] Scheduler: Sending due task gettweets-every-5-mins (twitter.tasks.get_tweets)
[2014-12-16 20:44:08,204: INFO/MainProcess] Scheduler: Sending due task gettweets-every-5-mins (twitter.tasks.get_tweets)
[2014-12-16 20:49:08,205: INFO/MainProcess] Scheduler: Sending due task gettweets-every-5-mins (twitter.tasks.get_tweets)
[2014-12-16 20:54:08,223: INFO/MainProcess] Scheduler: Sending due task gettweets-every-5-mins (twitter.tasks.get_tweets)

这是我的 celery.py 设置文件:

from datetime import timedelta

BROKER_URL = 'amqp://guest:guest@localhost//'

CELERY_DISABLE_RATE_LIMITS = True

CELERYBEAT_SCHEDULE = {
    'gettweets-every-5-mins': {
        'task': 'twitter.tasks.get_tweets',
        'schedule': timedelta(seconds=300) # 300 = every 5 minutes
    },
}

这是我的celeryapp.py:

from __future__ import absolute_import
import os
from django.conf import settings
from celery import Celery

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')

app = Celery('app')
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

这是我的twitter/tasks.py:

from __future__ import absolute_import
import logging
from celery import shared_task
from twitter.views import IngestTweets

log = logging.getLogger('custom.log')

@shared_task
def get_tweets():
    """
    Get tweets and save them to the DB
    """
    instance = IngestTweets()
    IngestTweets.get_new_tweets(instance)

    log.info('Successfully ingested tweets via celery task')
    return True

get_tweets 方法永远不会执行，但我知道它可以正常工作，因为我可以手动执行 get_tweets 并且它工作正常。

我花了两天时间想弄清楚为什么它发送了应有的任务，但不执行它们？任何帮助是极大的赞赏。提前致谢。

Answer 1

user2097159 感谢您为我指明了正确的方向，我不知道我还必须使用 supervisor 运行一个 worker。我认为它要么是一个 worker 要么是一个节拍，但现在我明白我必须有一个 worker 来处理任务和一个节拍来定期触发任务。

下面是主管缺少的 worker 配置:

[program:nrv_celery_worker]
; Worker
command=/Users/tsantor/.virtualenvs/nrv_env/bin/celery worker -A app --loglevel=INFO

; Project dir
directory=/Users/tsantor/Projects/NRV/nrv

; Logs
stdout_logfile=/Users/tsantor/Projects/NRV/nrv/logs/celery_worker.log
redirect_stderr=true

autostart=true
autorestart=true
startsecs=10
user=tsantor
numprocs=1

; Need to wait for currently executing tasks to finish at shutdown.
; Increase this if you have very long running tasks.
stopwaitsecs = 600

; When resorting to send SIGKILL to the program to terminate it
; send SIGKILL to its whole process group instead,
; taking care of its children as well.
killasgroup=true

; if rabbitmq is supervised, set its priority higher
; so it starts first
priority=998

然后我重置了 RabbitMQ 队列。现在我已经通过主管管理了节拍和 worker 程序，一切都按预期进行。希望这可以帮助其他人。