新手有个问题: go 写的 grpc 服务, 部署到 k8s-ingress, 客户端调用报错 DNS resolution failed for service

服务端

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-grpc-server-demo
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: go-grpc-server-demo
  template:
    metadata:
      labels:
        app: go-grpc-server-demo
    spec:
      containers:
        - name: go-grpc-server-demo
          image: <reponame>/go-grpc-server-demo
          imagePullPolicy: Always
      imagePullSecrets:
        - name: image-pull-secret-default

ingress.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: go-grpc-server-demo
  namespace: default
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: "GRPC"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
spec:
  ingressClassName: nginx
  tls:
    - hosts:
        - "grpc-demo.domain.com"
      secretName: tls-domain-com
  rules:
    - host: grpc-demo.domain.com
      http:
        paths:
          - path: /
            backend:
              serviceName: traefik
              servicePort: 80

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: go-grpc-server-demo
  namespace: default
  labels:
    service: go-grpc-server-demo
spec:
  ports:
    - port: __PORT__
      protocol: TCP
      targetPort: __PORT__
  selector:
    app: go-grpc-server-demo
  type: ClusterIP

server.go

https://github.com/grpc/grpc-go/blob/91e0aeb192456225adf27966d04ada4cf8599915/examples/features/reflection/server/main.go