k8s Ingress 添加支持带有下划线的Header参数

在k8s环境中，一般前端代理都使用Ingress进行代理，开发调用传参的时候会遇到头部名称带下划线的需求，这种前端调用带下划线会被Ingress丢弃掉，这个问题估计很多人都遇到过。在Ingress官方文档中默认Enables underscores in header names. default: is disabled是为false的

如果我们需要Ingress支持前端传参带下划线的需求，需要在Ingress的configmap种开启并配置enable-underscores-in-headers参数

修改Ingress configmap

<span>kind</span>
<span>:</span>
<span> </span>
<span>ConfigMap</span>
<span>apiVersion</span>
<span>:</span>
<span> v1</span>
<span>metadata</span>
<span>:</span>
<span>  name</span>
<span>:</span>
<span> abcdocker</span>
<span>-</span>
<span>nginx</span>
<span>  </span>
<span>namespace</span>
<span>:</span>
<span> ingress</span>
<span>  annotations</span>
<span>:</span>
<span>    control</span>
<span>-</span>
<span>plane</span>
<span>.</span>
<span>alpha</span>
<span>.</span>
<span>kubernetes</span>
<span>.</span>
<span>io</span>
<span>/</span>
<span>leader</span>
<span>:</span>
<span> </span>
<span>>-</span>
<span>      </span>
<span>{</span>
<span>"holderIdentity"</span>
<span>:</span>
<span>"abcdocker-nginx-85679f444d-dqxh6"</span>
<span>,</span>
<span>"leaseDurationSeconds"</span>
<span>:</span>
<span>30</span>
<span>,</span>
<span>"acquireTime"</span>
<span>:</span>
<span>"2023-01-31T09:37:23Z"</span>
<span>,</span>
<span>"renewTime"</span>
<span>:</span>
<span>"2023-06-07T03:00:17Z"</span>
<span>,</span>
<span>"leaderTransitions"</span>
<span>:</span>
<span>24</span>
<span>}</span>
<span>data</span>
<span>:</span>
<span>  enable</span>
<span>-</span>
<span>underscores</span>
<span>-</span>
<span>in</span>
<span>-</span>
<span>headers</span>
<span>:</span>
<span> </span>
<span>'true'</span>
<span>   </span>
<span>#此处添加</span>

<span>#请不要直接复制，根据自己需求添加data标签复制</span>

如果是nginx 出现想支持下划线的header请求，需要在http标签下添加underscores_in_headers on;