Django docker-无法翻译主机名“ db”地址：提供的节点名或服务名，或者未知 [英] Django docker - could not translate host name "db" to address: nodename nor servname provided, or not known

问题描述

我对Django和Docker还是比较陌生，并且正在遵循有关构建迷你应用程序的教程。但是，我陷入了以下错误：

I'm relatively new to Django and Docker and am following a tutorial to build a mini application. However, I'm getting stuck with the following error:

django.db.utils.OperationalError：无法将主机名 db转换为地址：提供的节点名或服务名，或者未知

我的docker-compose文件如下：

My docker-compose file looks as follows:

 version: '3'
 services:
  db:
     image: 'postgres'
     ports:
       - '5432'
  core:
    build:
      context: .
      dockerfile: Dockerfile
    command: python3 manage.py runserver 0.0.0.0:8000
    ports:
      - '8000:8000'
    volumes:
      - .:/code
    depends_on:
      - db
    links:
      - db:db

我的settings.py文件包含数据库：

My settings.py file contains the database:

DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.postgresql',
    'NAME': 'postgres',
    'USER': 'postgres',
    'HOST': 'db',
    'PORT': 5432,
}
}

我看过帖子此处和此处但是，这两个问题都没有解决。

I've seen the post here and here however both have not fixed the issue.

希望您能提供一些指导。谢谢。

Would appreciate some guidance. Thanks.

推荐答案

因此，您正在尝试从另一个容器访问在一个容器中运行的数据库？如果是的话，以下内容可能会有所帮助，至少在遇到类似问题时对我有帮助。

So you are trying to reach the db which is running in one container from another container? If yes - the following could potentially help, at least it helped me when I had similar issues.

除了定义网络之外，还应尝试定义网络配置在撰写文件中链接，创建一个具有某些名称的网络，然后在两个服务中都对其进行定义。就像此处所述，因为停靠在 链接 配置建议这样做。

Try to define networks config in addition to links in your compose file, create a network with some name and define it in both services. Like described here, as the docks on links config recommend to do that.

您的情况是这样的：

version: '3'
 services:
  db:
     image: 'postgres'
     ports:
       - '5432'
     networks:
      some_network:
  core:
    build:
      context: .
      dockerfile: Dockerfile
    command: python3 manage.py runserver 0.0.0.0:8000
    ports:
      - '8000:8000'
    volumes:
      - .:/code
    depends_on:
      - db
    links:
      - db:db
    networks:
      some_network:
  networks:
   some_network:

它帮助我解析了主机名以连接到数据库。

It helped me to resolve the host name to connect to the db.

这篇关于Django docker-无法翻译主机名“ db”地址：提供的节点名或服务名，或者未知的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！