worker_processes 4; # 四个进程
events {
    workder_connections 1024;
}
http{

    // 通过weight实现负载均衡
    upstream backend {
        server 192.168.159.130: 9002 weight=2; // 每访问两次9002才访问一次9003
        server 192.168.159.130: 9003 weight=1;
        server 168.168.159.111: 80;
    }

    // upstream backend {
    //    server 192.168.159.130: 9002;
    //    server 192.168.159.130: 9003;
    //    server 168.168.159.111: 80;
    // }
    // 这样配置权重一致，那么是依次进行的

    server{
        listen 9000; # 一个监听端口，以端口区分，也可以用域名区别
        location / {
            # root /home/king/share/nginx/html9000;
            proxy_pass http://backend; // 代理，开放9000端口作为代理，实际转发到9002及9003和外部
        }
    }
    server{
        listen 9001;
        location / {
            root /home/king/share/nginx/html9001;
        }
    }
    server{
        listen 9002;
        location / {
            root /home/king/share/nginx/html9002;
        }
    }
    server{
        listen 9003;
        location / {
            root /home/king/share/nginx/html9003;
        }
    }
}