參考地址：https://www.bilibili.com/video/BV1Bx411Z7Do

http{
    
    server {

        listen      80;
        server_name localhost;
        default_type    text/html;

        location / {
            echo "hello";
        }

        # 反向代理
        # 這個時候訪問 localhost/a, 實(shí)際訪問的是  http://192.168.0.1:80/a
        location /a {
            proxy_pass  http://192.168.0.1:80;
        }

        # 這個時候訪問 localhost/a/, 實(shí)際訪問的是  http://192.168.0.1:80/
        location /a/ {
            proxy_pass  http://192.168.0.1:80/;
        }

    }

}

反向代理小結(jié)

location /a {
    proxy_pass http://ip;
}

location /b/ {
    proxy_pass http://ip/;
}

上述配置會導(dǎo)致：
/a/x -> http://ip/a/x;
/b/x -> http://ip/x;

負(fù)載均衡小結(jié)

http{
    
    upstream group1 {
        server 192.168.0.12:80 weight=10;
        server 192.168.0.12:81 weight=1;
    }

    server {

        listen      80;
        server_name localhost;
        default_type    text/html;

        location / {
            echo "hello";
        }

        # 這個時候，訪問 localhost 會跳轉(zhuǎn)到 192.168.0.12:80或者 192.168.0.12:81
        # 過程是隨機(jī)的，可以通過weight參數(shù)控制權(quán)重
        location /a/ {
            proxy_pass  http://group1/;
        }

    }

}