a.hcl

job "api" {
    datacenters = ["dc1"]
    type = "service"

    group "api" {
        count = 3

        network {
            mode = "bridge"
        }

        task "api" {
            driver = "docker"

            config {
                image = "nicholasjackson/fake-service:v0.14.1"
            }

            env {
                NAME = "api (${NOMAD_ALLOC_ID})"
                MESSAGE = "ok"
                LISTEN_ADDR = "0.0.0.0:9090"
            }

            resources {
                cpu    = 50
                memory = 64
            }
        }
    }
}

client.hcl

data_dir = "/etc/nomad.d/data"

client {
  enabled = true
  
  server_join {
    retry_join = ["server.dc1.nomad_cluster.shipyard.run"]
  }

  # Also tried it without this..no luck
  network_interface = "eth0"
}

plugin "raw_exec" {
  config {
    enabled = true
  }
}

server.hcl

data_dir = "/etc/nomad.d/data"

server {
  enabled = true
  bootstrap_expect = 1
}