前期準(zhǔn)備

1.beat插件安裝

pip3 install django-celery-beat

2.注冊(cè)APP

INSTALLED_APPS = [.... ’django_celery_beat’,]

3.數(shù)據(jù)庫變更

python3 manage.py migrate django_celery_beat

配置工作

目錄結(jié)構(gòu)請(qǐng)參考：//www.jb51.net/article/200659.htm

1.配置celerypro.py

from __future__ import absolute_importimport osfrom celery import Celeryfrom django.conf import settingsfrom django.utils import timezone# set the default Django settings module for the ’celery’ program.# 為celery設(shè)置環(huán)境變量os.environ.setdefault(’DJANGO_SETTINGS_MODULE’, ’voice_quality_assurance_configure.settings’)# 創(chuàng)建celery appapp = Celery(’voice_quality_assurance_configure’)# Using a string here means the worker will not have to# pickle the object when using Windows.# 從單獨(dú)的配置模塊中加載配置app.config_from_object(’voice_quality_assurance_configure.celeryconfig’)# 設(shè)置app自動(dòng)加載任務(wù)app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)# 解決時(shí)區(qū)問題,定時(shí)任務(wù)啟動(dòng)就循環(huán)輸出app.now = timezone.now

2.配置celeryconfig.py

from __future__ import absolute_importfrom kombu import Queuefrom django.conf import settings# 設(shè)置代理人brokerCELERY_BROKER_URL = ’redis://127.0.0.1:6379/2’# 指定 BackendCELERY_RESULT_BACKEND = ’redis://127.0.0.1:6379/1’# 指定時(shí)區(qū)，默認(rèn)是 UTCCELERY_TIMEZONE=’Asia/Shanghai’# celery 序列化與反序列化配置CELERY_TASK_SERIALIZER = ’pickle’CELERY_RESULT_SERIALIZER = ’pickle’CELERY_ACCEPT_CONTENT = [’pickle’, ’json’]CELERY_IGNORE_RESULT = True# celery 的啟動(dòng)工作數(shù)量設(shè)置CELERY_WORKER_CONCURRENCY = 10# 任務(wù)預(yù)取功能，會(huì)盡量多拿 n 個(gè)，以保證獲取的通訊成本可以壓縮。CELERYD_PREFETCH_MULTIPLIER = 20# 有些情況下可以防止死鎖CELERYD_FORCE_EXECV = True# celery 的 worker 執(zhí)行多少個(gè)任務(wù)后進(jìn)行重啟操作CELERY_WORKER_MAX_TASKS_PER_CHILD = 100# 禁用所有速度限制，如果網(wǎng)絡(luò)資源有限，不建議開足馬力。CELERY_DISABLE_RATE_LIMITS = True# celery beat配置（周期性任務(wù)設(shè)置）CELERY_ENABLE_UTC = FalseCELERY_TIMEZONE = settings.TIME_ZONEDJANGO_CELERY_BEAT_TZ_AWARE = FalseCELERY_BEAT_SCHEDULER = ’django_celery_beat.schedulers:DatabaseScheduler’

3.分別啟動(dòng)woker和beta

項(xiàng)目根目錄終端執(zhí)行（voice_quality_assurance_configure為項(xiàng)目名稱，簡(jiǎn)單來說，和manage.py文件同級(jí)）

celery -A voice_quality_assurance_configure beat -l info --scheduler django_celery_beat.schedulers:DatabaseScheduler #

啟動(dòng)beta 調(diào)度器使用數(shù)據(jù)庫

celery worker -A voice_quality_assurance_configure --loglevel=info -n worker1 #啟動(dòng)celery worker

4.創(chuàng)建周期性任務(wù)

from datetime import datetime, timedeltaimport jsonimport os,djangoos.environ.setdefault('DJANGO_SETTINGS_MODULE', 'voice_quality_assurance_configure.settings')# project_name 項(xiàng)目名稱django.setup()from django_celery_beat.models import PeriodicTask, IntervalScheduleschedule, created = IntervalSchedule.objects.get_or_create(every=10,period=IntervalSchedule.SECONDS,)# 帶參數(shù)的創(chuàng)建方法，如下：PeriodicTask.objects.create( interval=schedule, # 上面創(chuàng)建10秒的間隔 interval 對(duì)象 name=’test_task’, # 設(shè)置任務(wù)的name值 task=’mission.tasks.my_task’, # 指定需要周期性執(zhí)行的任務(wù) args=json.dumps([10, 2, 76]), expires=datetime.utcnow() + timedelta(seconds=30))

詳解創(chuàng)建周期性任務(wù)的方法

創(chuàng)建基于interval的周期性任務(wù)

第一步創(chuàng)建間隔對(duì)象

schedule, created = IntervalSchedule.objects.get_or_create( every=10, period=IntervalSchedule.SECONDS,)

IntervalSchedule.DAYS 固定間隔天數(shù)IntervalSchedule.HOURS 固定間隔小時(shí)數(shù)IntervalSchedule.MINUTES 固定間隔分鐘數(shù)IntervalSchedule.SECONDS 固定間隔秒數(shù)IntervalSchedule.MICROSECONDS 固定間隔微秒

第二步創(chuàng)建任務(wù)

無參數(shù)的創(chuàng)建方法：

PeriodicTask.objects.create( interval=schedule, # we created this above. name=’test_task’, # simply describes this periodic task. task=’app名.tasks.任務(wù)函數(shù)名’, # name of task.)

有參數(shù)的創(chuàng)建方法：

PeriodicTask.objects.create( interval=schedule, # we created this above. name=’test’_task’, # simply describes this periodic task. task=’app名.tasks.任務(wù)函數(shù)名’, # name of task. 　args=json.dumps([’arg1’, ’arg2’]), kwargs=json.dumps({ ’be_careful’: True, }), expires=datetime.utcnow() + timedelta(seconds=30) )

class MonitorDeviceTask(object): ''' 設(shè)備創(chuàng)建，增加周期性任務(wù) ''' def __init__(self, device_obj): self.device_obj = device_obj self.periodic_task = PeriodicTask.objects.create( interval=schedule, name=’test_task’, task=’mission.tasks.my_task’, args=json.dumps([self.device_obj.ip]) ) def starttask(self): ''' 啟動(dòng)任務(wù) ''' self.periodic_task.enabled = True self.periodic_task.save() def stoptask(self): ''' 停止任務(wù) ''' self.periodic_task.enabled = False self.periodic_task.save() def deltask(self): ''' 刪除任務(wù) ''' self.periodic_task.delete() self.periodic_task.save()

創(chuàng)建基于 crontab 的周期性任務(wù)

from django_celery_beat.models import CrontabSchedule, PeriodicTaskschedule, _ = CrontabSchedule.objects.get_or_create( minute=’30’, hour=’*’, day_of_week=’*’, day_of_month=’*’, month_of_year=’*’, timezone=pytz.timezone(’Canada/Pacific’))

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