Nginx 反向代理：如何通过子域访问不同的容器？

Question

这就是我使用 nginx 配置反向代理的方式。有运行 nodeJS 应用程序的 docker 容器（app1，app2，...）

有了这个，我指向localhost:8080docker容器app1 nodeJS应用程序和localhost:8081app2。

但是我想在不使用端口的情况下通过子域调用应用程序，我不知道如何获得它。我也认为我搞砸了端口...

app1.localhost应该指向app1并且app2.localhost应该指向app2。

配置文件

http {
  sendfile on;

  upstream docker-app1 {
    server app1:80;
  }

  upstream docker-app2 {
    server app2:80;
  }

  server {
    listen 8080;
    server_name app1.localhost;
    location / {
      proxy_pass         http://docker-app1;
      proxy_redirect     off;
      proxy_buffering    off;
      proxy_set_header   Host $host;
      proxy_set_header   X-Real-IP $remote_addr;
      proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header   X-Forwarded-Host $server_name;
      #proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
    }
  }

  server {
    listen 8081;
    server_name app2.localhost;
    location / {
      proxy_pass         http://docker-app2;
      proxy_redirect     off;
      proxy_buffering    off;
      proxy_set_header   Host $host;
      proxy_set_header   X-Real-IP $remote_addr;
      proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header   X-Forwarded-Host $server_name;
      #proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
    }
  }
}

docker-compose.yml

version: '3.3'
services:
  nginx:
    container_name: 'nginx'
    image: 'nginx:1.13.5'
    restart: 'always'
    ports:
      - '80:80'
      - '8080:8080'
      - '8081:8081'
      - '443:443'
    volumes:
      - './nginx/conf/nginx.conf:/etc/nginx/nginx.conf:ro'

  app1:
    container_name: app1
    build: ./app1
    restart: always
    ports:
      - '3001:80'

  app2:
    container_name: app2
    build: ./app1
    restart: always
    ports:
      - '4200:80'

更新：由于 Sergiu 为反向代理提供了一个很好的链接，我使用新配置更新了帖子；问题还是一样

Answer 1

而不是自定义 nginx，使用jwilder/nginx-proxy应该就足够了：

version: '3.3'
services:
  nginx:
    image: jwilder/nginx-proxy
    ports:
      - "80:80"
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro

  app1:
    container_name: app1
    build: ./app1
    restart: always
    environment:
      VIRTUAL_HOST: app1.localhost
    ports:
      - 80

  app2:
    container_name: app2
    build: ./app1
    restart: always
    environment:
      VIRTUAL_HOST: app2.localhost
    ports:
      - 80

然后把它放在/etc/host你的机器上：

127.0.0.1 app1.localhost
127.0.0.1 app2.localhost

使用如下：

curl -i app1.localhost

jwilder/nginx-proxy将神奇地VIRTUAL_HOST从每个容器中读取环境变量（通过 docket API），然后相应地设置其配置文件。