[英]Celery worker in docker won't get correct message broker
我正在使用應用程序工廠模式創建Flask服務,並且需要將celery用於異步任務。 我還使用docker和docker-compose包含並運行所有內容。 我的結構如下所示:
server
|
+-- manage.py
+-- docker-compose.yml
+-- requirements.txt
+-- Dockerfile
|
+-- project
| |
| +-- api
| |
| +--tasks.py
|
| +-- __init__.py
我的tasks.py
文件如下所示:
from project import celery_app
@celery_app.task
def celery_check(test):
print(test)
我調用manage.py
運行,如下所示:
# manage.py
from flask_script import Manager
from project import create_app
app = create_app()
manager = Manager(app)
if __name__ == '__main__':
manager.run()
我的__init__.py
看起來像這樣:
# project/__init__.py
import os
import json
from flask_mongoalchemy import MongoAlchemy
from flask_cas import CAS
from flask import Flask
from itsdangerous import JSONWebSignatureSerializer as JWT
from flask_httpauth import HTTPTokenAuth
from celery import Celery
# instantiate the database and CAS
db = MongoAlchemy()
cas = CAS()
# Auth stuff (ReplaceMe is replaced below in create_app())
jwt = JWT("ReplaceMe")
auth = HTTPTokenAuth('Bearer')
celery_app = Celery(__name__, broker=os.environ.get("CELERY_BROKER_URL"))
def create_app():
# instantiate the app
app = Flask(__name__, template_folder='client/templates', static_folder='client/static')
# set config
app_settings = os.getenv('APP_SETTINGS')
app.config.from_object(app_settings)
# Send new static files every time if debug is enabled
if app.debug:
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
# Get the secret keys
parse_secret(app.config['CONFIG_FILE'], app)
celery_app.conf.update(app.config)
print(celery_app.conf)
# set up extensions
db.init_app(app)
cas.init_app(app)
# Replace the secret key with the app's
jwt.secret_key = app.config["SECRET_KEY"]
parse_config(app.config['CONFIG_FILE'])
# register blueprints
from project.api.views import twist_blueprint
app.register_blueprint(twist_blueprint)
return app
在我的docker-compose中,我啟動一個worker並定義一些環境變量,如下所示:
version: '2.1'
services:
twist-service:
container_name: twist-service
build: .
volumes:
- '.:/usr/src/app'
ports:
- 5001:5000 # expose ports - HOST:CONTAINER
environment:
- APP_SETTINGS=project.config.DevelopmentConfig
- DATABASE_NAME_TESTING=testing
- DATABASE_NAME_DEV=dev
- DATABASE_URL=twist-database
- CONFIG_FILE=./project/default_config.json
- MONGO_PASSWORD=user
- CELERY_RESULT_BACKEND=redis://redis:6379
- CELERY_BROKER_URL=redis://redis:6379/0
- MONGO_PORT=27017
depends_on:
- celery
- twist-database
celery:
container_name: celery
build: .
command: celery -A project.api.tasks --loglevel=debug worker
volumes:
- '.:/usr/src/app'
twist-database:
image: mongo:latest
container_name: "twist-database"
environment:
- MONGO_DATA_DIR=/data/db
- MONGO_USER=mongo
volumes:
- /data/db
ports:
- 27017:27017 # expose ports - HOST:CONTAINER
command: mongod
redis:
image: "redis:alpine"
command: redis-server
volumes:
- '/redis'
ports:
- '6379:6379'
但是,當我運行docker-compose文件並生成容器時,最終在celery worker日志中得到了這個:
[2017-07-20 16:53:06,721: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 111] Connection refused.
這意味着工作人員在創建芹菜時會忽略redis的配置集,而是嘗試使用Rabbitmq。 我嘗試將project.api.tasks更改為project和project.celery_app,但無濟於事。
在我看來, celery
服務也應該具有環境變量CELERY_RESULT_BACKEND
和CELERY_BROKER_URL
。
您需要將Docker服務鏈接在一起。 最簡單的方法是在dockerfile中添加networks
部分 。
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