nginx-configMap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: custom-headers
  namespace: ingress-nginx
data:
  X-Different-Name: "true"
  X-Request-Start: t=${msec}
  X-Using-Nginx-Controller: "true"
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: ingress-nginx-controller
  namespace: ingress-nginx
data:
  add-headers: "ingress-nginx/custom-headers"
  # proxy-set-headers: "ingress-nginx/custom-headers"