Openshift 已设置的X-Forwarded-Host标头不应被HaProxy覆盖

有人能告诉我如何在openshift 3.11中配置自定义ha代理路由器（haproxy config.template）以避免X-Forwarded-Host、X-Forwarded-Port和X-Forwarded-Proto头在haproxy已设置时不被覆盖。如果未设置标头，则应根据HTTP标准进行设置

我试过了，但不起作用

谢谢，

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Santosh

下面的代码对我很有用：

旧配置：

   http-request set-header X-Forwarded-Host %[req.hdr(host)]
   http-request set-header X-Forwarded-Port %[dst_port]
   http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
   http-request set-header X-Forwarded-Proto https if { ssl_fc }

更改为新的：

   acl h_xfh_exists req.hdr(X-Forwarded-Host) -m found
   http-request set-header X-Forwarded-Host %[req.hdr(host)] unless h_xfh_exists
   acl h_xfport_exists req.hdr(X-Forwarded-Port) -m found
   http-request set-header X-Forwarded-Port %[dst_port] unless h_xfport_exists
   acl h_xfproto_exists req.hdr(X-Forwarded-Proto) -m found
   http-request set-header X-Forwarded-Proto http if !{ ssl_fc } !h_xfproto_exists
   http-request set-header X-Forwarded-Proto https if { ssl_fc } !h_xfproto_exists