Nginx与多个docker-compose出现错误111

1. 确认各个docker-compose的端口是否有冲突，如果有冲突需要修改。端口在docker-compose.yml文件中定义。
2. 检查docker-compose.yml文件中的networks字段是否一致。可以把所有的docker-compose放在同一个network下。示例如下：

version: '3.7'
services:
  nginx:
    image: nginx:latest
    ports:
      - "80:80"
    depends_on:
      - backend
    networks:
      my_network:
        aliases:
          - nginx
  backend:
    image: node:latest
    ports:
      - "3000:3000"
    networks:
      my_network:
        aliases:
          - backend
networks:
  my_network:
    driver: bridge

3. 确认nginx配置文件是否正确。示例如下：

worker_processes 1;
events { worker_connections 1024; }
http {
  sendfile on;
  upstream backend {
    server backend:3000;
  }
  server {
    listen 80;
    server_name localhost;
    location / {
      proxy_pass http://backend;
    }
  }
}

4. 如果还有问题，可以尝试重启docker服务。命令如下：

sudo systemctl restart docker