dynamic inventory from terraform

demo.tpl

[kube-master]
${k8s_master_name}

inventory.tf

data  "template_file" "demo" {
    template = "${file("./templates/demo.tpl")}"
    vars {
        some_var_list = "${join("\n", some_machine.k8s-master.*.name)}"
    }
}

resource "local_file" "demo" {
  content  = "${data.template_file.demo.rendered}"
  filename = "./inventory/host"
}

output.txt

[kube-master]
k8s-master-01
k8s-master-02
k8s-master-03