node.js - 无法通过 Docker 中的 node.js 连接到 MongoDB

Question

我的 node.js Express 应用程序无法连接到 Docker 中的 MongoDB。 我对 Docker 不太熟悉。

node.js 连接:

import mongodb from 'mongodb';
...
mongodb.MongoClient.connect('mongodb://localhost:27017', ... );

docker 文件:

FROM node:argon
RUN mkdir /app
WORKDIR /app
COPY package.json /app
RUN npm install
COPY . /app
EXPOSE 3000
CMD ["npm", "start"]

docker-compose.yml

version: “2”
 services:
  web:
   build: .
   volumes:
     — ./:/app
   ports:
   — “3000:3000”
   links:
    — mongo
   mongo:
    image: mongo
    ports:
      — “27017:27017”

构建命令:docker build -t NAME .

运行命令:docker run -ti -p 3000:3000 NAME

连接错误:

[MongoError: failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017]]
  name: 'MongoError',
  message: 'failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017]'

Answer 1

尝试:

mongodb.MongoClient.connect('mongodb://mongo:27017', ... );

改变你的docker-compose.yml:

version: "2"

services:

  web:
    build: .
    volumes:
      - ./:/app
    ports:
      - "3000:3000"
    links:
      - mongo

  mongo:
    image: mongo
    ports:
      - "27017:27017"

并使用一些 docker compose命令:

docker-compose down
docker-compose build
docker-compose up -d mongo
docker-compose up web