这个功能nginx 的mirror 插件也支持，基本原理就是数据发送后端，但是不进行响应
getambassador.io/config: |
---
apiVersion: ambassador/v0
kind: Mapping
name: myservice-mapping
prefix: /myservice/
service: myservice.default
getambassador.io/config: |
---
apiVersion: ambassador/v0
kind: Mapping
name: myservice-shadow-mapping
prefix: /myservice/
service: myservice-shadow.default
shadow: truehttps://www.getambassador.io/reference/shadowing
https://nginx.org/en/docs/http/ngx_http_mirror_module.html
原文：https://www.cnblogs.com/rongfengliang/p/9274507.html