[英]Celery in Docker container: ERROR/MainProcess consumer: Cannot connect to redis
[英]Cannot connect to redis container
我正在嘗試使用環境變量將 redis 容器連接到 python 應用程序容器。 我將密碼作為環境變量傳遞但它沒有連接,如果我不使用環境變量並對密碼進行硬編碼,它可以正常工作,否則它會給出redis.exceptions.ConnectionError
version: "3.7"
services:
nginx_app:
image: nginx:latest
depends_on:
- flask_app
volumes:
- ./default.conf:/etc/nginx/conf.d/default.conf
ports:
- 8090:80
networks:
- my_project_network
flask_app:
build:
context: .
dockerfile: Dockerfile
expose:
- 5000
environment:
- PASSWORD=pass123a
depends_on:
- redis_app
networks:
- my_project_network
redis_app:
image: redis:latest
command: redis-server --requirepass ${PASSWORD} --appendonly yes
environment:
- PASSWORD=pass123a
volumes:
- ./redis-vol:/data
expose:
- 6379
networks:
- my_project_network
networks:
my_project_network:
索引.py
from flask import Flask
from redis import Redis
import os
app = Flask(__name__)
redis = Redis(host='redis_app', port=6379, password=os.getenv('PASSWORD'))
@app.route('/')
def hello():
redis.incr('hits')
return 'Hello World! I have been seen %s times.' % redis.get('hits')
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
更新您的 docker-compose.yaml
環境是一個字符串列表:
docker-composer 插入 ${ENV} ,其中 ENV 的值是從 .env 文件加載的
利用:
command: redis-server --requirepass $PASSWORD --appendonly yes
代替:
command: redis-server --requirepass ${PASSWORD} --appendonly yes
您可以通過以下方式驗證容器內的環境變量:
docker-compose run --rm flask_app printenv | grep PASSWORD
那應該返回:
PASSWORD=pass123a
docker-compose 環境變量示例: 這里
看起來您錯過了將環境變量傳遞給您的 Redis 容器。
嘗試這個:
version: "3.7"
services:
nginx_app:
image: nginx:latest
#LOCAL IMAGE
depends_on:
- flask_app
volumes:
- ./default.conf:/etc/nginx/conf.d/default.conf
ports:
- 8082:80
networks:
- my_project_network
flask_app:
build:
context: .
dockerfile: Dockerfile
expose:
- 5000
environment:
- PASSWORD=pass123a
depends_on:
- redis_app
networks:
- my_project_network
redis_app:
image: redis:latest
command: redis-server --requirepass ${PASSWORD} --appendonly yes
environment:
- PASSWORD=pass123a
volumes:
- ./redis-vol:/data
expose:
- 6379
networks:
- my_project_network
networks:
my_project_network:
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