docker容器内的redis连接错误 [英] redis connection error within docker container

问题描述

我正在尝试设置一个在Docker中运行的轻量级RQ任务队列应用程序.我不断收到此错误:

I'm trying to setup a light-weight RQ task queue app running in Docker. I keep on getting this error:

ValueError:Redis URL必须指定以下方案之一(redis://，rediss://，unix://)

从环境变量( os.getenv())抓取时不起作用，但是以某种方式在 redis://redis:6379/0 中进行硬编码时>，似乎有效.但是，我认为这并不是一个长期的解决方案.我看了看: link1 和

When grabbing from environmental variable (os.getenv()) it doesn't work, but somehow when hard-coding in redis://redis:6379/0, it seems to work. However, this is not really a long-term solution in my opinion. I looked at: link1 and link2, but there wasn't really a solution, the thread went dead.

我的redis连接代码如下:

My redis connection code is like so:

import os
import redis
from rq import Worker, Queue, Connection

listen = ['default']
redis_url = os.getenv('REDIS_URL', 'redis://localhost:6379')

if __name__ == '__main__':
    print(f"redis url: {redis_url}")
    with Connection(redis.from_url(redis_url)):
        worker = Worker(list(map(Queue, listen)))
        worker.work()

当打印 redis_url 时，它是正确的；我将环境变量 REDIS_URL 设置为 redis://redis:6379 ，其中redis是docker-compose.yml中的主机名.

When it prints the redis_url it is correct; I set the environmental var, REDIS_URL to redis://redis:6379 where redis is the hostname in docker-compose.yml.

  redis:
    image: redis:alpine
    expose:
      - '6379'

感谢任何帮助.谢谢.

推荐答案

发现它的字符串末尾有一个神秘的 \ ，所以我使用了 .strip()，并使用 .getenv()方法工作.我认为这与docker-compose如何将变量传递给flask有关.我最好的猜测.

Found out it there were mysterious \ at the ends of the string, so I used .strip() and it works using the .getenv() method. I think it has something to do with how docker-compose passes the variable to flask; my best guess.

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