SOURCE

http {
    upstream product_server { 127.0.0.1: 8081; }
    upstream admin_server{ 127.0.0.1: 8082; }
    upstream test_server{ 127.0.0.1: 8083; }
    # 默认指向product的server
    server {
        location / {
            proxy_pass http://product_server;      
        }

        location / product / {
            proxy_pass http://product_server;     
        }

        location / admin / {
            proxy_pass http://admin_server;     
        }

        location / test / {
            proxy_pass http://test_server;      
        }

    }
}