typhoon/digital-ocean/container-linux/kubernetes/workers.tf

# Worker DNS records
resource "digitalocean_record" "workers" {
  count = "${var.worker_count}"

  # DNS zone where record should be created
  domain = "${var.dns_zone}"

  name  = "${var.cluster_name}-workers"
  type  = "A"
  ttl   = 300
  value = "${element(digitalocean_droplet.workers.*.ipv4_address, count.index)}"
}

# Worker droplet instances
resource "digitalocean_droplet" "workers" {
  count = "${var.worker_count}"

  name   = "${var.cluster_name}-worker-${count.index}"
  region = "${var.region}"

  image = "${var.image}"
  size  = "${var.worker_type}"

  # network
  ipv6               = true
  private_networking = true

  user_data = "${data.ct_config.worker_ign.rendered}"
  ssh_keys  = "${var.ssh_fingerprints}"

  tags = [
    "${digitalocean_tag.workers.id}",
  ]
}

# Tag to label workers
resource "digitalocean_tag" "workers" {
  name = "${var.cluster_name}-worker"
}

# Worker Container Linux Config
data "template_file" "worker_config" {
  template = "${file("${path.module}/cl/worker.yaml.tmpl")}"

  vars = {
    k8s_dns_service_ip      = "${cidrhost(var.service_cidr, 10)}"
    k8s_etcd_service_ip     = "${cidrhost(var.service_cidr, 15)}"
    kubeconfig_ca_cert      = "${module.bootkube.ca_cert}"
    kubeconfig_kubelet_cert = "${module.bootkube.kubelet_cert}"
    kubeconfig_kubelet_key  = "${module.bootkube.kubelet_key}"
    kubeconfig_server       = "${module.bootkube.server}"
  }
}

data "ct_config" "worker_ign" {
  content      = "${data.template_file.worker_config.rendered}"
  pretty_print = false
}