amazon-web-services - 亚马逊AWS + Varnish + varnish-devicedetect

Question

有人可以帮忙设置吗？

在我的实例 (RHEL) 中，安装了 Varnish 效果很好。
然后设置 varnish-devicedetect ，

 yum  list installed | grep varnish
 varnish.x86_64                        3.0.5-1.16.amzn1             @amzn-main
 varnish-libs.x86_64                   3.0.5-1.16.amzn1             @amzn-main
 varnish-release.noarch                4.0-3.el6                    installed

当我尝试向 defaul.vcl 添加任何代码示例时，Varnish 无法启动。这段代码没问题:

 include "devicedetect.vcl";
 sub vcl_recv {
     call devicedetect;
 }

但是在此 Varnish 无法启动之后:

 sub vcl_backend_response {
     if (bereq.http.X-UA-Device) {
         if (!beresp.http.Vary) { # no Vary at all
             set beresp.http.Vary = "X-UA-Device";
         } elsif (beresp.http.Vary !~ "X-UA-Device") { # add to existing Vary
             set beresp.http.Vary = beresp.http.Vary + ", X-UA-Device";
         }
     }
     # comment this out if you don't want the client to know your classification
     set beresp.http.X-UA-Device = bereq.http.X-UA-Device;
 }

尝试过，甚至是空的:

 sub vcl_backend_response {

 }

导致同样的问题。
我错过了什么？

Answer 1

似乎找到了答案:需要使用Varnish ver。中的使用规则。 3，用过此套:

sub vcl_fetch {
    if (req.http.X-UA-Device) {
        if (!beresp.http.Vary) { # no Vary at all
            set beresp.http.Vary = "X-UA-Device";
        } elseif (beresp.http.Vary !~ "X-UA-Device") { # add to existing Vary
            set beresp.http.Vary = beresp.http.Vary + ", X-UA-Device";
        }
    }
    set beresp.http.X-UA-Device = req.http.X-UA-Device;
}
sub vcl_deliver {
    if ((req.http.X-UA-Device) && (resp.http.Vary)) {
        set resp.http.Vary = regsub(resp.http.Vary, "X-UA-Device", "User-Agent");
    }
}

在这里找到: https://www.varnish-cache.org/docs/3.0/tutorial/devicedetection.html