1. 环境
python==2.7
djang==1.11.2 # 1.8, 1.9, 1.10应该都没问题
celery-with-redis==3.0 # 需要用到redis作为中间人服务(Broker)
celery==3.1.25 # 安装上面的会自动安装
kombu==3.0.37
billiard==3.3.0.23
django-celery==3.2.2 # celery插件, 实现定时任务
celery>=4.0 不支持windows, 具体参考官方文档
2. 安装
pip install django==1.11.2 celery-with-redis==3.0 django-celery==3.2.2
3. 安装Redis, 用作Broker (RabbitMQ 官方推荐, 但安装麻烦点)
教程很多, 略
4. 新建django项目
- Demo
- Demo
setting.py
wsgi.py
urls.py
- app
- migrations
models.py
views.py
...
- 配置
settings.py
INSTALLED_APPS = (
...
'app',
'djcelery',# django-celery 可以在admin后台定义定时任务, 开始前需要直接migrate
)
BROKER_URL = 'redis://127.0.0.1:6379/0'
BROKER_TRANSPORT = 'redis'
CELERYBEAT_SCHEDULER = 'djcelery.schedulers.DatabaseScheduler' # 数据库调度
- 新建文件
Demo/Demo/celery.py
from __future__ import absolute_import
import os
from celery import Celery
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'Demo.settings')
from django.conf import settings # noqa
app = Celery('Demo')
# Using a string here means the worker will not have to
# pickle the object when using Windows.
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
@app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))
- 新建
Demo/app/tasks.py
from Demo.celery import app
@app.task
def cus_task(*arg):
print('This is a test task')
- 编辑
Demo/app/views.py
from django.shortcuts import render, HttpResponse
from .tasks import cus_task
def index(request):
cus_task.delay()
return HttpResponse("Test async task")
- 启动
django
和celery
# django
python manage.py runserver
# celery
celery -A Demo worker -l debug
admin后台中配置celery
计划
- 配置
# 如上settings.py中的设置, 后执行
python manage.py migrate djcelery
- 登陆admin后台进行配置
# Djcelery模块列表
Crontabs # 同linux crontab
Intervals # 间隔
Periodic tasks # 周期任务
Tasks
Workers
配置一个
periodic task
任务内容app.tasks.cus_task
用crontab
或interval
设置每5s执行一次
- 启动django和celery, 并查看日志
celery -A Demo worker -l debug
# 另一个窗口
celery -A Demo beat -l debug --max-interval=10 # 每10s扫描一次djcelery任务
补充
- [ ] 安装
flower
pip install flower
- [ ] 启动flower(默认启动一个webserver:5555)
python manage.py celery flower
- [ ] 浏览器打开
http://localhost:5555
查看具体