如何设定使用多个后端主机：

backend default {

​ .host = “172.16.100.6”;

​ .port = “80”;

}

backend appsrv {

​ .host = “172.16.100.7”;

​ .port = “80”;

}

sub vcl_recv {

​ if (req.url ~ “(?i).php$”) {

​ set req.backend_hint = appsrv;

​ } else {

​ set req.backend_hint = default;

​ }

​

​ …

}

nginx: proxy_pass

haproxy: use_backend