Bagaimana cara menghubungkan klien TCP Node.js di wadah A ke server TCP di wadah B dengan Docker Compose?

Saya mencoba menghubungkan klien TCP di wadah A ke server TCP di wadah B. Menjalankan komposisi docker menghasilkan kesalahan ECONNREFUSED di sisi klien. 为什么呢？

Klien TCP terlihat seperti ini:

   var net = require('net');

var client = new net.Socket();
client.connect(1337, function() {
    console.log('Connected');
    client.write('Hello, server! Love, Client.');
});

client.on('data', function(data) {
    console.log('Received: ' + data);
    // client.destroy(); // kill client after server's response
});

client.on('close', function() {
    console.log('Connection closed');
});

Dockerfile klien TCP terlihat seperti ini:

FROM node:latest

RUN mkdir /app
WORKDIR /app

ADD . /app

ADD package.json /app
RUN npm install

EXPOSE 1337

ENV PATH /app/node_modules/.bin:$PATH

CMD npm start

Server TCP terlihat seperti ini:

var net = require('net');

var server = net.createServer(function(socket) {
    socket.write('Echo server\r\n');
    socket.pipe(socket);
});

server.listen(1337);

Dockerfile server TCP terlihat seperti ini:

FROM node:latest

RUN mkdir /app
WORKDIR /app

ADD . /app

ADD package.json /app
RUN npm install

EXPOSE 1337

ENV PATH /app/node_modules/.bin:$PATH

CMD npm start

docker-compose.yml terlihat seperti ini:

version: "3"
services:
  tcpclient:
    build: ./tcpclient
    ports:
      - "8000:8000"
    depends_on:
      - tcpserver
  tcpserver:
    build: ./tcpserver
    ports:
      - "8001:1337"

Kesalahan koneksi terlihat seperti ini:

tcpclient_1  | > [email protected] start /app
tcpclient_1  | > node tcpclient.js
tcpclient_1  |
tcpclient_1  | events.js:137
tcpclient_1  |       throw er; // Unhandled 'error' event
tcpclient_1  |       ^
tcpclient_1  |
tcpclient_1  | Error: connect ECONNREFUSED 127.0.0.1:1337
tcpclient_1  |     at Object._errnoException (util.js:1003:13)
tcpclient_1  |     at _exceptionWithHostPort (util.js:1024:20)
tcpclient_1  |     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1194:14)
tcpclient_1  | npm ERR! code ELIFECYCLE

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