Use grpc service in Service Mash

Nomad
,
1

Hello!
I try to make working my grpc service under service mesh with custom ingress service.
We use as ingress customly deployed traefik with Consul provider.

I have some grpc service:

job "my-grpc-service" {
  type = "service"

  group "my-grpc-service" {
    count = 1

    task "my-grpc-service" {
      driver         = "docker"
      shutdown_delay = "3s"

      config {
        image = "[[ .image_tag ]]"
      }

      env {
        ConnectionStrings__Redis = "${NOMAD_UPSTREAM_ADDR_my_redis}"
      }
    }

    service {
      name = "my-grpc-service"
      port = 8080

      check {
        type         = "grpc"
        address_mode = "alloc"
        interval     = "10s"
        timeout      = "2s"
        expose       = true
        name         = "grpc-health-check"
      }

      tags = [
        "traefik.enable=true",
        "traefik.consulcatalog.connect=true",
        "traefik.http.routers.my-grpc-service.rule=Host(`my-grpc-service.my-domain`)",
        "traefik.http.routers.my-grpc-service.entrypoints=https",
        "traefik.http.services.my-grpc-service.loadbalancer.server.scheme=h2c"
      ]

      connect {
        sidecar_service {
          proxy {
            config {
              protocol = "grpc"
            }

            expose {
              path {
                path            = "/metrics"
                protocol        = "http"
                local_path_port = 9090
                listener_port   = "service_metrics"
              }
            }

            upstreams {
              destination_name = "my-redis"
              local_bind_port  = 6379
            }
          }
        }
      }
    }

    service {
      name = "my-grpc-service-metrics"
      port = "service_metrics"

      check {
        type     = "http"
        path     = "/metrics"
        interval = "10s"
        timeout  = "2s"
        method   = "HEAD"
      }
      tags = ["prometheus-metrics"]
    }

    network {
      mode = "bridge"

      port "service_metrics" {
        to = 9090
      }
    }
  }

  group "my-redis" {
    count = 1

    task "my-redis" {
      driver = "docker"

      config {
        image      = "redis:8.2.1-alpine"
        force_pull = false
      }
    }

    service {
      name = "my-redis"
      port = 6379

      connect {
        sidecar_service {
          proxy {}
        }
      }
    }

    network {
      mode = "bridge"
    }
  }
}

I’m trying to call service via traefik and url https://my-grpc-service.my-domain. But I receive error:

HTTP/2 200
content-type: application/grpc
date: Thu, 04 Sep 2025 12:18:13 GMT
grpc-message: upstream connect error or disconnect/reset before headers. reset reason: remote reset
grpc-status: 14
server: envoy
content-length: 0

Before I added service.connect.sidecar_service.proxy.config.protocol my service responded that I using http1 instead of htt2.

What I am doing wrong?

2

Problem was in my service.

It was written on ASP.NET Core and with reverse proxy requires that option:

builder.WebHost.ConfigureKestrel(options => options.AllowAlternateSchemes = true);