let types = import "../schemas/nomad/types.ncl" in
{
  prometheusPort | String,
  clientId
    | String
    | default
    = "{{ env \"NOMAD_JOB_NAME\" }}-{{ env \"NOMAD_ALLOC_INDEX\" }}",

  driver = 'exec,

  vault = {
    policies = ["nomad-cluster"],
    change_mode = 'noop,
  },

  resources = {
    cpu = 100,
    memory = 128,
  },

  config = {
    flake = "github:NixOS/nixpkgs/nixos-21.05#telegraf",
    command = "/bin/telegraf",
    args = [ "-config", "/local/telegraf.config" ],
  },

  template."local/telegraf.config" = {
    data = m%"
      [agent]
      flush_interval = "10s"
      interval = "10s"
      omit_hostname = false

      [global_tags]
      client_id = "\(#clientId)"
      namespace = "{{ env "NOMAD_NAMESPACE" }}"

      [inputs.prometheus]
      metric_version = 1

      urls = [ "http://{{ env "NOMAD_ADDR_\(#prometheusPort)" }}" ]

      [outputs.influxdb]
      database = "telegraf"
      urls = [ "http://172.16.0.20:8428" ]
    "%
  },
  ..
}