node.js - 连接上游时出错。 Docker 撰写，NodeJS，Nginx

Question

我正在尝试为 Nginx 和 NodeJS(使用 React)设置一个 docker compose。但是得到以下错误:*2 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.0.1, server: ~.*, request: "GET /favicon.ico HTTP/1.1", upstream: "http://192.168.0.2:3000/favicon.ico", host: "localhost", referrer: "http://localhost/"曾尝试更改文件nginx.conf，添加depends_on，链接参数，向default.conf添加各种配置，从windows和linux启动，使用其他端口，均无济于事。
有了这个配置，结果收集了其他项目，除了这个，每个人都在工作，但在结构上它与其余的相同，除了根文件夹“app”中的 .env 文件。
Node 的 Dockerfile:

FROM node:13.12.0-alpine

# set working directory
WORKDIR /home/node/app

# install app dependencies

COPY package*.json ./

RUN npm install react-scripts -g
RUN npm install

# add app
COPY . ./

# start app
CMD ["npm", "start"]

docker -compose.yml:

version: '3'

services:
  nodejs:
    build:
      context: ../app
      dockerfile: ./../docker/dockerfile/node/Dockerfile
    container_name: user-node
    restart: unless-stopped
    volumes:
      - ../app:/home/node/app
    expose:
      - 3000
  nginx:
    image: nginx:latest
    container_name: forensic-nginx
    volumes:
        - ../app:/home/node/app
        - ./logs/nginx:/var/log/nginx
        - ./config/nginx:/etc/nginx/conf.d
    ports:
      - 80:80
    depends_on:
      - nodejs

default.conf (nginx):

server {
    listen 80;
    server_name ~.*;

    location / {
        proxy_pass http://user-node:3000;
    }
}

项目结构:

- project
  - app
    - package.json *and more*
  - docker
    - confing
      - nginx
        - default.conf
    - dockerfile
      - node
        - Dockerfile
    docker-compose.yml

在打开 localhost:80 时出现错误 502: bad geteway

Answer 1

您需要使用 docker 网络。更改您的 docker-compose.yml像这样:

version: '3'

services:
  nodejs:
    networks:
      - custom-network
    build:
      context: ../app
      dockerfile: ./../docker/dockerfile/node/Dockerfile
    container_name: user-node
    restart: unless-stopped
    volumes:
      - ../app:/home/node/app
    expose:
      - 3000
  nginx:
    networks:
      - custom-network
    image: nginx:latest
    container_name: forensic-nginx
    volumes:
        - ../app:/home/node/app
        - ./logs/nginx:/var/log/nginx
        - ./config/nginx:/etc/nginx/conf.d
    ports:
      - 80:80
    depends_on:
      - nodejs
      
networks:
  custom-network:
    driver: bridge

你的 nginx 配置应该是这样的:

server {
    listen 80;
    server_name ~.*;

    location / {
        proxy_pass http://nodejs:3000;
    }
}

如果您在 localhost 上使用端口 80 时遇到问题，请尝试更改 docker-compose.yml 的 nginx 部分中的映射使用另一个端口。例如

    ports:
      - 8088:80