Django、Nginx、Docker 与 AWS ElasticBeanstalk 上的 Postgresql - 无法将主机名“db”转换为地址：名称或服务未知

Question

我正在尝试将我的 Django 应用程序部署到 AWS ElasticBeanStalk。在我的本地计算机上使用 Docker compose 一切正常。但是当它在 AWS 上运行时，它给了我这个： Image of error

docker-compose.yml：

    version: '3'

services:
  db:
    image: postgres
    hostname: db
  app:
    build:
      context: .
      dockerfile: config/app/Dockerfile
    command: sh /config/on-container-start.sh
    hostname: app
    volumes:
      - ./app:/app
    expose:
      - "8000"
    depends_on:
      - db
  nginx:
    image: nginx:latest
    hostname: nginx
    ports:
      - "80:8000"
    volumes:
      - ./config/nginx:/etc/nginx/conf.d
    depends_on:
      - app

Nginx

# define group app
upstream app {
  # balancing by ip
  ip_hash;

  # define server app
  server app:8000;
}

# portal
server {
  # all requests proxies to app
  location / {
         proxy_pass http://app/;
    }

  # only respond to port 8000
  listen 8000;

  # domain localhost
  server_name localhost;
}

在settings.py中：

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

任何帮助将不胜感激， 谢谢

Answer 1

您尝试过link 选项吗？

所以，你的作文应该是这样的：

version: '3'

services:
  db:
    image: postgres
    hostname: db
  app:
    build:
      context: .
      dockerfile: config/app/Dockerfile
    command: sh /config/on-container-start.sh
    hostname: app
    links:
      - db
    volumes:
      - ./app:/app
    expose:
      - "8000"
    depends_on:
      - db
  nginx:
    image: nginx:latest
    hostname: nginx
    ports:
      - "80:8000"
    volumes:
      - ./config/nginx:/etc/nginx/conf.d
    depends_on:
      - app
    links:
      - app

depends on 选项用于在应用程序之前启动依赖项。