title: kubernetes ingress controller not forwarding request headers
body: <p>I am working on a kubernetes cluster and problem faced is:</p>
  
  <p>From UI/browser, I can see it is sending a request header called "<strong>request_id</strong>" please refer to image:</p>
  
  <p><a href="https://i.stack.imgur.com/Y57cJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Y57cJ.png" alt="enter image description here"></a></p>
  
  <p>But while checking on backend it is unavailable. While searching through internet, I could see that people are talking about adding following entry to <strong>Ingress</strong> object:</p>
  
  <pre><code>nginx.ingress.kubernetes.io/configuration-snippet: |
        proxy_set_header request_id "$req_id";
  </code></pre>
  
  <p>But it is generating a new value for this and not passing value submitted by browser. </p>
  
  <p>Any ideas, what might be missing here?</p>