hostnet.hcl

client {
  host_network "public" {
    cidr = "192.168.86.227/32"
  }
}

hostnet.nomad

job "example" {
  datacenters = ["dc1"]

  group "cache" {
    network {
      port "db" {
        to = 6379
        host_network = "public"
      }
    }

    task "redis" {
      driver = "docker"

      config {
        image = "redis:3.2"

        ports = ["db"]
      }

      resources {
        cpu    = 500
        memory = 256
      }
    }
  }
}

run.sh

sudo -E nomad agent -dev -config hostnet.hcl

# In another terminal
nomad run hostnet.nomad