luigi.tf

resource "template_file" "luigi-config" {
  template = "cloud-config/luigi.yml"
  vars {
    default = "${file("cloud-config/default.yml")}"
    ...
  }
}

resource "template_cloudinit_config" "luigi-config" {
  gzip = true
  base64_encode = false

  part {
    content_type = "text/cloud-config"
    content = "${template_file.luigi-config.rendered}"
 }
}