Traefik 2.5 with Consul Connect on Nomad

traefik.nomad

# Simple example to deploy traefik with consul connect enabled.
# For simplicity the job includes traefik as well as the backend service.
# Please note that traefik currently only supports connect for HTTP.
job "traefik-consul-connect-demo" {
  datacenters = ["dc1"]

  group "edge" {

    network {
      mode = "bridge"
      port "http" {
        to     = 8080
      }
    }

    service {
      name = "traefik-ingress"
      port = "http"

      connect {
        native = true
      }
    }

    task "traefik" {
      driver = "docker"
      config {
        image = "traefik:v2.5.2"
        args = [
          # Enables connect support, otherwise only http connections would be tried
          "--providers.consulcatalog.connectaware=true",
          # Make the communication secure by default
          "--providers.consulcatalog.connectbydefault=true",
          "--providers.consulcatalog.exposedbydefault=false",
          "--entrypoints.http=true",
          "--entrypoints.http.address=:8080",
          # The service name below should match the nomad/consul service above
          # and is used for intentions in consul
          "--providers.consulcatalog.servicename=traefik-ingress",
          "--providers.consulcatalog.prefix=traefik",

          # Automatically configured by Nomad through CONSUL_* environment variables
          # as long as client consul.share_ssl is enabled
          # "--providers.consulcatalog.endpoint.address=<socket|address>"
          # "--providers.consulcatalog.endpoint.tls.ca=<path>"
          # "--providers.consulcatalog.endpoint.tls.cert=<path>"
          # "--providers.consulcatalog.endpoint.tls.key=<path>"
          # "--providers.consulcatalog.endpoint.token=<token>"
        ]
      }

      env {
        # Enable this if nomad is older than 1.1.3
        # CONSUL_TLS_SERVER_NAME = "localhost"
      }
    }
  }

  group "backend" {
    network {
      mode = "bridge"
    }

    service {
      name = "whoami"
      port = 80
      tags = [
        "traefik.enable=true",
        "traefik.http.routers.whoami.rule=Host(`whoami.example.com`)"
      ]

      connect {
        sidecar_service {}
      }
    }

    # Note: For increased security the service should only listen on localhost
    # Otherwise it could be reachable from the outside world without going through connect
    task "whoami" {
      driver = "docker"
      config {
        image = "containous/whoami"
      }
    }
  }
}

The sidecar is necessary for traefik?