data "template_file" "inventory" {
  template = "${file("files/ansible_hosts.tpl")}"

  depends_on = [
    "libvirt_domain.domain",
  ]

  vars = {
    managers = "${join("\n", slice(libvirt_domain.domain.*.name, 0, 3))}"
    workers  = "${join("\n", slice(libvirt_domain.domain.*.name, 3, length(libvirt_domain.domain.*.name)))}"
  }
}

resource "null_resource" "ansible" {
  triggers = {
    template_rendered = "${data.template_file.inventory.rendered}"
  }

  provisioner "local-exec" {
    command = "echo '${data.template_file.inventory.rendered}' > ansible/hosts"
  }

  provisioner "local-exec" {
    command = "cd ansible && ansible-playbook --diff provision.yaml"
  }
}