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這篇文章將為大家詳細(xì)講解有關(guān)利用Django-celery-beat怎么動(dòng)態(tài)添加一個(gè)周期性任務(wù),文章內(nèi)容質(zhì)量較高,因此小編分享給大家做個(gè)參考,希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。
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(kù)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_import import os from celery import Celery from django.conf import settings from 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 app app = 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(wèn)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_import from kombu import Queue from django.conf import settings # 設(shè)置代理人broker CELERY_BROKER_URL = 'redis://127.0.0.1:6379/2' # 指定 Backend CELERY_RESULT_BACKEND = 'redis://127.0.0.1:6379/1' # 指定時(shí)區(qū),默認(rèn)是 UTC CELERY_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(kāi)足馬力。 CELERY_DISABLE_RATE_LIMITS = True # celery beat配置(周期性任務(wù)設(shè)置) CELERY_ENABLE_UTC = False CELERY_TIMEZONE = settings.TIME_ZONE DJANGO_CELERY_BEAT_TZ_AWARE = False CELERY_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(chēng),簡(jiǎn)單來(lái)說(shuō),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(kù)
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, timedelta import json import os,django os.environ.setdefault("DJANGO_SETTINGS_MODULE", "voice_quality_assurance_configure.settings")# project_name 項(xiàng)目名稱(chēng) django.setup() from django_celery_beat.models import PeriodicTask, IntervalSchedule schedule, 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(wú)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, PeriodicTask schedule, _ = 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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