node.js - Dockerized MongoDB 无法从 NodeJs 容器连接到 Heroku

Question

我有一个 Node 网络服务，而且我对 docker 有点陌生，所以请耐心等待。下面是我的 docker-compose 文件。我已在本地运行此镜像并且工作正常，但是当尝试将其部署到 Heroku 时，出现以下错误:

{ MongoError: failed to connect to server [mongo:27017] on first connect [MongoError: getaddrinfo ENOTFOUND mongo mongo:27017]

我找到了应该在 Heroku 中设置环境标志的位置，所以我设法检查了它，结果很好。但仍然找不到 mongo:27017

我可能做错了什么？

version: "3"
services:
  mongo:
    container_name: mongo
    image: mongo
    volumes:
      - ./data:/data/charecters
    ports:
      - "27017:27017"
    environment:
      - MONGO_INITDB_ROOT_USERNAME=admin
      - MONGO_INITDB_ROOT_PASSWORD=password
  mongo-seed:
    build: ./mongo-seed
    links:
      - mongo
    volumes:
      - ./mongo-seed:/mongo-seed
    command:
      - /mongo-seed/script.sh
  app:
    container_name: app
    restart: always
    build: .
    ports:
      - "3000:3000"
    links:
      - mongo
    environment:
      - DB_SERVERS=mongo:27017

Answer 1

links:
      - mongo

is depreciated try 

depends_on:
     - mongo

also, check that 

mongo:
    container_name: mongo, is properly referenced in DB setup

change command:
  - /mongo-seed/script.sh

try command:
   - 'node your-app-file'