在dockerized项目上运行Django迁移 [英] Running Django migrations on dockerized project

问题描述

我有一个 Django 项目在多个 Docker 容器中运行，并借助 docker-撰写。源代码是从本地计算机上的目录附加的。这是撰写的配置文件：

I have a Django project running in multiple Docker containers with help of docker-compose. The source code is attached from directory on my local machine. Here's the compose configuration file:

version: '3'
services:
  db:
    image: 'postgres'
    ports:
      - '5432:5432'
  core:
    build:
      context: .
      dockerfile: Dockerfile
    command: python3 manage.py runserver 0.0.0.0:8000
    ports:
      - '8001:8000'
    volumes:
      - .:/code
    depends_on:
      - db

尽管应用程序启动为应该，我不能运行迁移，因为每次执行 manage.py makemigrations ... 我都会收到：

Although the application starts as it should, I can't run migrations, because every time I do manage.py makemigrations ... I receive:

django.db.utils.OperationalError: could not translate host name "db" to address: nodename nor servname provided, or not known

很明显，我可以在核心 bash c>容器并从那里运行 makemigrations ，但是随后在容器内部创建了迁移文件，这非常不舒服。

Obviously I can open bash inside the core container and run makemigrations from there, but then the migration files are created inside the container which is very uncomfortable.

在我的项目设置中，数据库配置为：

In my project's settings the database is configured as:

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

由于docker postgres映像可在 localhost：5432 我尝试将数据库主机的设置更改为：

As docker postgres image is accessible at localhost:5432 I tried changing database host in settings to:

'HOST': '0.0.0.0'

但是然后用 docker-compose up 启动容器时接收：

But then when firing up the containers with docker-compose up I'm receiving:

...
django.db.utils.OperationalError: could not connect to server: 
Connection refused
Is the server running on host "0.0.0.0" and accepting
TCP/IP connections on port 5432?
...

如何在设置中配置数据库。 py 以便 Django 可以访问它来创建迁移？

How should I configure database in settings.py so that Django can access it to create migrations?

推荐答案

您的docker-compose配置不正确。您忘记了链接服务

Your docker-compose configurations are not correct. You forgot to link services

version: '3'
services:
  db:
    image: 'postgres'
    ports:
      - '5432:5432'
  core:
    build:
      context: .
      dockerfile: Dockerfile
    command: python3 manage.py runserver 0.0.0.0:8000
    ports:
      - '8001:8000'
    volumes:
      - .:/code
    depends_on:
      - db
    links: # <- here
      - db

这篇关于在dockerized项目上运行Django迁移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！