docker-compose在url中解析主机名 [英] docker-compose resolve hostname in url

问题描述

试图环顾四周，但找不到与我需要的东西接近的东西。

Tried looking around but couldn't find anything close to what I need.

我有一个包含docker容器的docker-compose文件（ web ）通过解析主机名在其环境变量中使用另一个容器的IP（ api ）：

I have a docker-compose file with a docker container (web) that uses another container's IP (api) in its environment variable by resolving the hostname:

version: '3'
services:
  web:
    build: ../client/
    ports:
      - "5000:5000"
      - "3000:3000"
    environment:
      REACT_APP_API_DEV: http://api:8000/server/graphql
  api:
    build: ../server/
    env_file:
      - server_variables.env
    ports:
      - "8000:8000"
  redis:
    image: "redis:alpine"

我的问题是网络在运行时不会解析此变量。我可以在 web 容器内ping api 很好，但是 http：// api：8000 无法正确解析。我还尝试将HOST = api设置为变量并手动构建URI，但这也不起作用。

My issue is that web doesn't resolve this variable when it's running. I can ping api just fine inside the web container but http://api:8000 doesn't resolve properly. I also tried making HOST=api the variable and building the URI manually but that doesn't work either.

编辑：我为以下操作添加了完整的docker-compose.yml文件参考。我可以在 web 内 curl api 很好容器，但我的应用似乎无法正确解决。我正在使用NodeJS和React

I added a complete docker-compose.yml file for reference. I can curl the api just fine from inside the web container, but my app can't seem to resolve it properly. I'm using NodeJS and React

推荐答案

您必须使用 网络

You have to link them using network

version: '3'
services:
  web:
    ...
    environment:
      - HOST: http://api:8000
    networks:
      - my-network
    ...
  api:
    networks:
      - my-network
    ...

networks:
  my-network:

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