访问414是因为请求头参数过长的错误，解决办法为加大client_header_buffer_size 和large_client_header_buffers的配置，需要修改nginx配置项

我这里使用的是k8s，如果jenkins 也是同样的道理

如果是多层nginx则需要定位问题产生源的层级如下是我的问题产生。

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此处出现问题
外网域名访问
内网服务器
服务发现
服务A

通过http内网路由访问服务A

需要在Kubernetes nginx-ingress-controller修改配置项


如阿里云，添加则提示支持中划线，下划线。

直接输入下划线则不生效，可能直接报错，我这个版本是报错。


因内部直接将下划线转义成中划线处理,所以此处需要填写中划线

client_header_buffer_size 和large_client_header_buffers必须配置到nginx-ingress-controller的nginx-configuration
里面，进而注入到nginx.conf里面的http配置段覆盖默认值；通过ingress的annotation，虽然能单独配置client_header_buffer_size 和large_client_header_buffers，注入到nginx.conf的server段，但是优先级较低，系统仍以http的配置为主。

client_header_buffer_size 和large_client_header_buffers配置到nginx-ingress-controller的configuration里面时，必须改成中划线。

参考资源 https://www.e-learn.cn/topic/3248654

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