Varnish 后端主机直接在 vcl_recv？

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";
       }
   }

如果这不可能，是否有替代方法？其实，我事先对后端一无所知。

Answer 1

是的，我认为您指的是 vcl_recv() 中的 req.backend/req.backend_hint，Varnish 3 语法：

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

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

并且在 Varnish 4 语法中：

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

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

Varnish 后端主机直接在 vcl_recv？

Varnish backend host directly in vcl_recv?

varnish

varnish-vcl