Django无法连接到docker中的redis

Question

对不起我的英语。我在 django 中有项目，在我的项目中我想使用 celery 来执行后台任务，现在我需要在 docker 中为这个库设置设置。这是我的 docker 文件：

FROM python:3

MAINTAINER Alex2

RUN apt-get update

# Install wkhtmltopdf
RUN curl -L#o wk.tar.xz https://downloads.wkhtmltopdf.org/0.12/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz \
    && tar xf wk.tar.xz \
    && cp wkhtmltox/bin/wkhtmltopdf /usr/bin \
    && cp wkhtmltox/bin/wkhtmltoimage /usr/bin \
    && rm wk.tar.xz \
    && rm -r wkhtmltox

RUN apt-get install -y cron

# for celery
ENV APP_USER user
ENV APP_ROOT /src

RUN groupadd -r ${APP_USER} \
    && useradd -r -m \
    --home-dir ${APP_ROOT} \
    -s /usr/sbin/nologin \
    -g ${APP_USER} ${APP_USER}


# create directory for application source code
RUN mkdir -p /usr/django/app

COPY requirements.txt /usr/django/app/

WORKDIR /usr/django/app

RUN pip install -r requirements.txt

这是我的docker-compose.dev

version: '2.0'
services:
  web:
    build: .
    container_name: api_dev
    image: img/api_dev
    volumes:
      - .:/usr/django/app/
      - ./static:/static
    expose:
      - "8001"
    env_file: env/dev.env
    command: bash django_run.sh

  nginx:
    build: nginx
    container_name: ng_dev
    image: img/ng_dev
    ports:
      - "8001:8001"
    volumes:
      - ./nginx/dev_api.conf:/etc/nginx/conf.d/api.conf
      - .:/usr/django/app/
      - ./static:/static
    depends_on:
      - web
    links:
      - web:web

  db:
    image: postgres:latest
    container_name: pq01
    ports:
     - "5432:5432"

  redis:
    image: redis:latest
    container_name: rd01
    command: redis-server
    ports:
     - "8004:8004"

  celery:
    build: .
    container_name: cl01
    command: celery worker --app=myapp.celery
    volumes:
      - .:/usr/django/app/
    links:
      - db
      - redis

我有这个错误：

cl01      | User information: uid=0 euid=0 gid=0 egid=0
cl01      | 
cl01      |   uid=uid, euid=euid, gid=gid, egid=egid,
cl01      | [2018-07-31 16:40:00,207: ERROR/MainProcess] consumer: Cannot connect to redis://redis:8004/0: Error 111 connecting to redis:8004. Connection refused..
cl01      | Trying again in 2.00 seconds...
cl01      | 
cl01      | [2018-07-31 16:40:02,211: ERROR/MainProcess] consumer: Cannot connect to redis://redis:8004/0: Error 111 connecting to redis:8004. Connection refused..
cl01      | Trying again in 4.00 seconds...
cl01      | 
cl01      | [2018-07-31 16:40:06,217: ERROR/MainProcess] consumer: Cannot connect to redis://redis:8004/0: Error 111 connecting to redis:8004. Connection refused..
cl01      | Trying again in 6.00 seconds...

我不明白为什么它无法连接。我的设置文件项目

CELERY_BROKER_URL = 'redis://redis:8004/0'
CELERY_RESULT_BACKEND = 'redis://redis:8004/0'

一切看起来都不错，但也许在某些文件中我没有添加一些设置。请帮我解决这个问题

Answer 1

我认为是端口映射导致问题，所以，将docker-compose.dev文件中的redis设置更改为（删除ports选项）

redis:
    image: redis:latest
    container_name: rd01
    command: redis-server

在你的settings.py

CELERY_BROKER_URL = 'redis://redis:6379/0'
CELERY_RESULT_BACKEND = 'redis://redis:6379/0'

除非您在本地环境中使用它们，否则您不必映射端口