k8s Ingress 获取真实IP

apiVersion: v1
data:
  use-forwarded-headers: 'true' # 主要配置
  proxy-real-ip-cidr: 0.0.0.0/0 # 备选
kind: ConfigMap
metadata:
  annotations: {}
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/version: 1.0.0
  name: ingress-nginx-controller-nginx
  namespace: ingress-nginx