Call gRPC service (Go-micro) from Go client through Traefik

Question

I'm using Go-micro, Docker, Traefik to deploy my service. I deployed go-micro service and registered with Traefik. This is my sum(grpc service) status in Traefik dashboard. When i curl it in Terminal, I got this result, I thought it's grpc message in binary. But when I used this code

package main

import (
    "context"
    "fmt"
    proto "gomicro-demo/client/service"
    "google.golang.org/grpc"
    "google.golang.org/grpc/metadata"
    "log"
)

func main() {


    con, err := grpc.Dial("localhost:8080", grpc.WithInsecure())

    if err != nil {
        log.Fatal("Connection error: ", err)
    }

    md := metadata.New(map[string]string{"Host": "sum.traefik"})
    ctx := metadata.NewOutgoingContext(context.Background(), md)

    service := proto.NewSumClient(con)
    res, err2 := service.GetSum(ctx, &proto.Request{})

    if err2 == nil {
        fmt.Println(res)
    } else {
        log.Fatal("Call error:", err2)
    }

}

i got this error rpc error: code = Unimplemented desc = Not Found: HTTP status code 404; transport: received the unexpected content-type "text/plain; charset=utf-8". I can't know how this error happen, because of address or grpc metadata (Host header). Please help me with this problem. Thank you very much!

Answer 1

you can export tcp like it. please using trefik2, HostSNI must be seted

apiVersion: traefik.containo.us/v1alpha1
kind: IngressRouteTCP
metadata:
  name: redis
spec:
  entryPoints:
    - redis
  routes:
  - match: HostSNI(`*`)
    services:
    - name: redis
      port: 6379