Python Celery 编写简单的定时任务
1、编写celery的配置文件
from datetime import timedelta CELERYBEAT_SCHEDULE = { # 给任务定义名字 'add': { 'task': 'celerytasks.add', # 反射查找到该函数执行 'schedule': timedelta(seconds=3), # 这里使用3秒执行一次 'args': (16, 16) # 给add函数，传入两个参数 } }
2、编写执行任务程序
from celery import Celery broker_url = 'pyamqp://development:root@192.168.2.129:5672//development_host' backend_url = 'rpc://development:root@192.168.2.129:5672//development_host' # 第一个参数 tasks是给 Celery 对象起了个名字 app = Celery('tasks', broker=broker_url, backend=backend_url) app.config_from_object('celeryconfig') @app.task def add(x, y): print("result=", x + y) return x + y
3、Windows 不支持运行，只能 在linux服务器上运行该定时任务
[root@mq1 timer_task]# celery -A timer_task worker -l info --beat /root/python366/lib/python3.6/site-packages/celery/platforms.py:801: RuntimeWarning: You're running the worker with superuser privileges: this is absolutely not recommended! Please specify a different user using the --uid option. User information: uid=0 euid=0 gid=0 egid=0 uid=uid, euid=euid, gid=gid, egid=egid, -------------- celery@mq1 v4.4.7 (cliffs) --- ***** ----- -- ******* ---- Linux-3.10.0-1127.el7.x86_64-x86_64-with-centos-7.8.2003-Core 2020-08-26 17:58:35 - *** --- * --- - ** ---------- [config] - ** ---------- .> app: tasks:0x7fb80d6d99b0 - ** ---------- .> transport: amqp://development:**@192.168.2.129:5672//development_host - ** ---------- .> results: rpc:// - *** --- * --- .> concurrency: 1 (prefork) -- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker) --- ***** ----- -------------- [queues] .> celery exchange=celery(direct) key=celery [tasks] . timer_task.add [2020-08-26 17:58:35,980: INFO/Beat] beat: Starting... [2020-08-26 17:58:36,004: INFO/MainProcess] Connected to amqp://development:**@192.168.2.129:5672//development_host [2020-08-26 17:58:36,022: INFO/MainProcess] mingle: searching for neighbors [2020-08-26 17:58:36,038: INFO/Beat] Scheduler: Sending due task add (timer_task.add) [2020-08-26 17:58:37,144: INFO/MainProcess] mingle: all alone [2020-08-26 17:58:37,160: INFO/MainProcess] celery@mq1 ready. [2020-08-26 17:58:37,161: INFO/MainProcess] Received task: timer_task.add[cfb931e9-2c6d-43fe-9a3d-85650a676407] [2020-08-26 17:58:37,270: WARNING/ForkPoolWorker-2] result= [2020-08-26 17:58:37,272: WARNING/ForkPoolWorker-2] 32 [2020-08-26 17:58:37,303: INFO/ForkPoolWorker-2] Task timer_task.add[cfb931e9-2c6d-43fe-9a3d-85650a676407] succeeded in 0.03400736500043422s: 32 [2020-08-26 17:58:38,995: INFO/Beat] Scheduler: Sending due task add (timer_task.add) [2020-08-26 17:58:38,998: INFO/MainProcess] Received task: timer_task.add[71fa8b9e-8296-4f4a-a740-69af2a4cdcd9] [2020-08-26 17:58:39,000: WARNING/ForkPoolWorker-2] result= [2020-08-26 17:58:39,000: WARNING/ForkPoolWorker-2] 32 [2020-08-26 17:58:39,002: INFO/ForkPoolWorker-2] Task timer_task.add[71fa8b9e-8296-4f4a-a740-69af2a4cdcd9] succeeded in 0.0020219220023136586s: 32 [2020-08-26 17:58:41,996: INFO/Beat] Scheduler: Sending due task add (timer_task.add) [2020-08-26 17:58:42,000: INFO/MainProcess] Received task: timer_task.add[882bb4dd-7adc-4752-981b-4ed675d1bbb0] [2020-08-26 17:58:42,001: WARNING/ForkPoolWorker-2] result= [2020-08-26 17:58:42,002: WARNING/ForkPoolWorker-2] 32 [2020-08-26 17:58:42,004: INFO/ForkPoolWorker-2] Task timer_task.add[882bb4dd-7adc-4752-981b-4ed675d1bbb0] succeeded in 0.002443025994580239s: 32
