我正在尝试使用nginx反向代理作为服务之一启动docker-compose.yml。代理应该将端口80上的请求转发到数据库容器：8080。
我尝试使用 localhost：8080 和 0.0.0.0：8080 作为proxy_pass值，但没有成功。容器在同一网络中运行。
最后，在我最后一次编写之后，我检查了数据库的容器IP地址，然后将该地址插入到nginx的proxy_pass中，如下所示：

http {
    server {
        listen 80;
        location / {
            proxy_pass http://192.168.48.2:8080;
            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;
        }
    }
}

然后在nginx容器中执行：nginx -s reload
可悲的是，我仍然得到一个 *502坏网关 * 当我访问localhost：80。localhost：8080将我带到WordPress设置页面。

很高兴知道这里发生了什么！

这里有完整的文档：docker-compose.yml，nginx容器的Dockerfile和我的原始nginx.conf

docker-compose.yml

version: "3"
services:
  reverse_proxy:
    container_name: reverse_proxy
    build: ./reverseproxy
    restart: always
    ports:
      - 80:80
  db:
    container_name: database
    image: mysql:5.7
    volumes:
      - db_data:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: cool-password
      MYSQL_DATABASE: wordpress
      MYSQL_USER: user
      MYSQL_PASSWORD: user-wordpress
  wordpress:
    container_name: wordpress
    depends_on:
      - db
    image: wordpress:latest
    ports:
      - "8080:80"
    environment:
      WORDPRESS_DB_HOST: db
      WORDPRESS_DB_USER: user
      WORDPRESS_DB_PASSWORD: user-wordpress
      WORDPRESS_DB_NAME: wordpress
volumes: 
  db_data:
networks:
  default:
    name: revprox

Dockerfile

FROM nginx:mainline-alpine
RUN rm /etc/nginx/conf.d/default.conf
RUN rm /etc/nginx/nginx.conf
COPY nginx.conf /etc/nginx/nginx.conf
VOLUME ["something/docker/wordpress-reverse-proxy/reverseproxy/logs", "/var/log/nginx"]
# RUN nginx -c /etc/nginx/nginx.conf
# RUN nginx -s reload
# CMD ["nginx", "-s", "reload"]

nginx.conf

worker_processes 1;
 
events { worker_connections 1024; }
 
http {
    server {
        listen 80;
        location / {
            proxy_pass http://0.0.0.0:8080;
            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;
        }
    }
}