直接在vcl_recv中上光后端主机吗？

Question

我可以在 vcl_recv 中直接提及后端主机吗？

   sub vcl_recv{
       if (req.http.host=="www.yourdomain.com.a-free-cdn.com") {
           set req.http.host = "www.yourdomain.com";
           set req.backend.host = "www.yourdomain.com";
       }
   }

如果这是不可能的，有没有其他方法可以做到这一点？实际上，我事先对后端一无所知。

Answer 1

是的，我想您是用Varnish 3语法在req.backend中指的req.backend_hint/vcl_recv():

backend www {
  .host = "www.example.com";
  .port = "http";
}

sub vcl_recv {
  if (req.http.host ~ "(?i)^(www.)?example.com$") {
    set req.backend = www;
  }
}

并使用 Varnish 4语法:

backend www {
  .host = "www.example.com";
  .port = "http";
}

sub vcl_recv {
  if (req.http.host ~ "(?i)^(www.)?example.com$") {
    set req.backend_hint = www;
  }
}