我一直在尝试部署由 Django、Postgresql 和 Nginx 组成的 docker。当我这样做时效果很好

sudo docker-compose up  

could not translate host name "db" to address: Name or service not known  

我所做的是将我的 docker 推送到 docker hub 使用

sudo docker build -t myname/dockername -f Dockerfile .  

eb deploy  

文件结构

myproject
    myproject
        settings.py
        urls.py
        ...
    Dockerfile
    Dockerrun.aws.json
    manage.py
    requirements.txt
    ...

Dockerfile

FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
COPY requirements.txt /code/
RUN pip install -r requirements.txt
COPY . /code/
EXPOSE 8000
CMD ["sh", "on-container-start.sh"]

Dockerrun.aws.json

{
 "AWSEBDockerrunVersion": "1",
 "Image": {
   "Name": "myname/dockername:latest",
   "Update": "true"
 },
 "Ports": [
   {
     "ContainerPort": "8000"
   }
 ]
}

docker-compose.yml

version: '3'

services:
  db:
    image: postgres
    hostname: db
    networks:
     - some_network
  web:
    restart: always
    build: .
    volumes:
      - .:/code
    hostname: web
    expose:
      - "8000"
    depends_on:
      - db
    links:
      - db:db
    networks:
      - some_network
  nginx:
    image: nginx
    hostname: nginx
    ports:
      - "8000:8000"
    volumes:
      - ./config/nginx:/etc/nginx/conf.d
    depends_on:
      - web
    networks:
      - some_network
networks:
  some_network:

我意识到的一件事是，当我在我的机器上使用 docker-compose up 时，我会运行 3 个不同的容器。然而在 EB 上，我看到只有一个容器在运行。

我认为这是因为我从 docker hub 获取了我用这些文件构建的图像，并且以某种方式导致这 3 个容器成为一个容器，并且它在识别主机名方面造成了混乱？我还是不太确定。非常感谢您的帮助。谢谢！

Dockerrun.aws.json应该与docker-compose.yml

主机名“db”无法转换为地址的问题原因是docker-compose.yml and Dockerrun.aws.json文件描述了不同的架构：

• 里面有3个集装箱docker-compose.yml
• 里面只有1个集装箱Dockerrun.aws.json

因此，应用程序试图解决db主机名并且找不到它，因为db未声明于Dockerrun.aws.json

Fix Dockerrun.aws.json

所以，更新你的Dockerrun.aws.json。您可以手动或使用方便的工具来完成micahhausler/容器变换:

a) 手动更新

您可以使用示例，例如：

• k2works/aws-eb-docker-多容器-示例**

b) 或使用更新它micahhausler/container-transform

你可以试试micahhausler/容器变换:

转换 docker-compose、ECS 和 Marathon 配置 转换 docker-compose、ECS 和 Marathon 配置

以下是它针对您的情况输出的内容：

$ container-transform docker-compose.yml > Dockerrun.aws.json

Dockerrun.aws.json

{
    "containerDefinitions": [
        {
            "essential": true,
            "image": "postgres",
            "name": "db"
        },
        {
            "essential": true,
            "image": "nginx",
            "mountPoints": [
                {
                    "containerPath": "/etc/nginx/conf.d",
                    "sourceVolume": "_ConfigNginx"
                }
            ],
            "name": "nginx",
            "portMappings": [
                {
                    "containerPort": 8000,
                    "hostPort": 8000
                }
            ]
        },
        {
            "essential": true,
            "links": [
                "db:db"
            ],
            "mountPoints": [
                {
                    "containerPath": "/code",
                    "sourceVolume": "_"
                }
            ],
            "name": "web"
        }
    ],
    "family": "",
    "volumes": [
        {
            "host": {
                "sourcePath": "."
            },
            "name": "_"
        },
        {
            "host": {
                "sourcePath": "./config/nginx"
            },
            "name": "_ConfigNginx"
        }
    ]
}

Note:：当然，您应该修复丢失的设置，例如memory for db and nginx容器。

你可以省略networks at all

根据Compose 中的网络 | Docker 文档:

例如，假设您的应用程序位于名为的目录中myapp， 和你的docker-compose.yml看起来像这样：

docker-compose.yml

version: "3"
services:
  web:
    build: .
    ports:
      - "8000:8000"
  db:
    image: postgres
    ports:
      - "8001:5432"

当你跑步时docker-compose up，会发生以下情况：

1. 一个名为myapp_default被建造。
2. 使用以下命令创建容器web的配置。它加入网络myapp_default以...之名web.
3. 使用以下命令创建容器db的配置。它加入网络myapp_default以...之名db.

所以，由于所有容器都链接到同一个some_network，可以省略。

docker-compose.yml

version: '3'

services:
  db:
    image: postgres
    hostname: db
  web:
    restart: always
    build: .
    volumes:
      - .:/code
    hostname: web
    expose:
      - "8000"
    depends_on:
      - db
    links:
      - db:db
  nginx:
    image: nginx
    hostname: nginx
    ports:
      - "8000:8000"
    volumes:
      - ./config/nginx:/etc/nginx/conf.d
    depends_on:
      - web

And $ container-transform docker-compose.yml > Dockerrun.aws.json将产生：

Dockerrun.aws.json

{
    "containerDefinitions": [
        {
            "essential": true,
            "image": "postgres",
            "name": "db"
        },
        {
            "essential": true,
            "image": "nginx",
            "mountPoints": [
                {
                    "containerPath": "/etc/nginx/conf.d",
                    "sourceVolume": "_ConfigNginx"
                }
            ],
            "name": "nginx",
            "portMappings": [
                {
                    "containerPort": 8000,
                    "hostPort": 8000
                }
            ]
        },
        {
            "essential": true,
            "links": [
                "db:db"
            ],
            "mountPoints": [
                {
                    "containerPath": "/code",
                    "sourceVolume": "_"
                }
            ],
            "name": "web"
        }
    ],
    "family": "",
    "volumes": [
        {
            "host": {
                "sourcePath": "."
            },
            "name": "_"
        },
        {
            "host": {
                "sourcePath": "./config/nginx"
            },
            "name": "_ConfigNginx"
        }
    ]
}