nginx根据域名二级目录进行转发实现负载均衡

目前需求如下 只有一个域名 要求根据不同的路径转发到不同服务器

实现如下（本地）

 

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;

    keepalive_timeout  65;


    #81~83端口 模拟web服务器集群
    server {
        listen       81;
        server_name  127.0.0.1;

        location / {
            root   html;
            index  81.html;
        }
    }

    server {
        listen       82;
        server_name  127.0.0.1;

        location / {
            root   html;
            index  82.html;
        }
    }

    server {
        listen       83;
        server_name  127.0.0.1;

        location / {
            root   html;
            index  83.html;
        }
    }

    #单独服务器专用于处理websocket请求
    server {
        listen       86;
        server_name  127.0.0.1;

        location / {
            root   html;
            index  schoolA_websocket.html;
        }
    }

    #根据ip策略负载web服务器
    upstream shcoolA_http_io_nodes {
        ip_hash;
        server 127.0.0.1:81;
        server 127.0.0.1:82;
        server 127.0.0.1:83;
    }

    upstream shcoolA_websocket_io_nodes {
        server 127.0.0.1:86;
    }

    #主入口
    server {
        listen       80;
        server_name  127.0.0.1;


        #location ^~ /http/schoolA { 表示以http/schoolA开头，下面的是精确匹配
        location /http/schoolA {
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_http_version 1.1;
            proxy_pass http://shcoolA_http_io_nodes/;#最后斜杠决定转发之后的路径
        }

        #location ^~ /websocket/schoolA {
        location /websocket/schoolA {
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_http_version 1.1;
            proxy_pass http://shcoolA_websocket_io_nodes/;
        }

        location / {
            return 403;
        }
    }
}

关于proxy_pass最后斜杠的补充说明

如果proxy_pass 的URL以 / 结尾 ，那么请求转发的时候将不会带上匹配到的 /http/schoolA ，也就是说如果请求 URL是 127.0.0.1:80/http/schoolA/login，Nginx将会把这个请求转发成 127.0.0.1：81/login，反之则是127.0.0.1：81/http/schoolA/login