node.js - Docker Node App Postgres错误 “Connection terminated unexpectedly”

Question

我正在尝试对Node API进行Docker化，并且仅在Dockerized应用中出现错误。在Docker之外，node server.js可以正常工作，没有任何问题。使用docker-compose up，无论有无API调用，我在10分钟后都会收到以下错误消息:

api    | [nodemon] starting `node server.js`
api    | listening on port 3000
api    | API is ready
api    | Error: Connection terminated unexpectedly
api    |     at Connection.<anonymous> (/api/node_modules/pg/lib/client.js:255:9)
api    |     at Object.onceWrapper (events.js:427:28)
api    |     at Connection.emit (events.js:321:20)
api    |     at Connection.EventEmitter.emit (domain.js:485:12)
api    |     at Socket.<anonymous> (/api/node_modules/pg/lib/connection.js:139:10)
api    |     at Socket.emit (events.js:333:22)
api    |     at Socket.EventEmitter.emit (domain.js:485:12)
api    |     at endReadableNT (_stream_readable.js:1201:12)
api    |     at processTicksAndRejections (internal/process/task_queues.js:84:21)
api    | [nodemon] app crashed - waiting for file changes before starting...

Docker文件

FROM node
WORKDIR /api
ADD . /api
RUN npm install
RUN npm install -g nodemon
EXPOSE 3000

docker-compose.yml

version: "3.7"
services:
  api:
    container_name: api
    build: .
    volumes:
      - .:/api
    ports:
      - "3000:3000"
    restart: unless-stopped
    working_dir: /api
    command: nodemon server.js

server.js

...
    try {
      let pgDbConfig;
      pgDbConfig = {
        host: '<host>',
        user: '<dbuser>',
        password: '<dbpass>',
        port: 5432,
        database: '<dbname>',
        max: 20,
        idleTimeoutMillis: 30000,
        connectionTimeoutMillis: 2000
      };

      pgPool = new Pool(pgDbConfig);

      // the pool will emit an error on behalf of any idle clients it contains if a backend error or network partition happens
      pgPool.on('error', (err, client) => {
        console.error('Unexpected error on idle pg client', err, client);
      });

      // trying to use error listener after the connect
      pgPool.on('connect', () => {
        pgPool.on('error', err => console.log(err));
      });

      console.log('API is ready');

    } catch(exception) {
      console.error('API is not ready');
      process.exit(1);
    }
...

Answer 1

我改变了解释答案的方式:
您基本上需要Postgres服务，在您的镜像中没有该服务，您基本上是在使用节点镜像而不运行Postgres数据库。

试试这个docker-compose.yml

version: "3.7"
services:
  api:
    container_name: api
    build: .
    depends_on:
      - postgres
    volumes:
      - .:/api
    ports:
      - "3000:3000"
    restart: unless-stopped
    working_dir: /api
    command: nodemon server.js
  postgres:
    image: postgres:10.4
    ports:
      - "35432:5432"

编辑1

主机

version: "3.7"
services:
  api:
    container_name: api
    build: .
    volumes:
      - .:/api
    ports:
      - "3000:3000"
      - "5432:5432"
    restart: unless-stopped
    working_dir: /api
    command: nodemon server.js