94 lines
2.8 KiB
HCL
94 lines
2.8 KiB
HCL
# Controller Instance DNS records
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resource "digitalocean_record" "controllers" {
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count = "${var.controller_count}"
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# DNS zone where record should be created
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domain = "${var.dns_zone}"
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# DNS record (will be prepended to domain)
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name = "${var.cluster_name}"
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type = "A"
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ttl = 300
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# IPv4 addresses of controllers
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value = "${element(digitalocean_droplet.controllers.*.ipv4_address, count.index)}"
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}
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# Discrete DNS records for each controller's private IPv4 for etcd usage
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resource "digitalocean_record" "etcds" {
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count = "${var.controller_count}"
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# DNS zone where record should be created
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domain = "${var.dns_zone}"
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# DNS record (will be prepended to domain)
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name = "${var.cluster_name}-etcd${count.index}"
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type = "A"
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ttl = 300
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# private IPv4 address for etcd
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value = "${element(digitalocean_droplet.controllers.*.ipv4_address_private, count.index)}"
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}
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# Controller droplet instances
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resource "digitalocean_droplet" "controllers" {
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count = "${var.controller_count}"
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name = "${var.cluster_name}-controller-${count.index}"
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region = "${var.region}"
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image = "${var.image}"
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size = "${var.controller_type}"
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# network
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ipv6 = true
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private_networking = true
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user_data = "${element(data.ct_config.controller_ign.*.rendered, count.index)}"
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ssh_keys = ["${var.ssh_fingerprints}"]
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tags = [
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"${digitalocean_tag.controllers.id}",
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]
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}
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# Tag to label controllers
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resource "digitalocean_tag" "controllers" {
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name = "${var.cluster_name}-controller"
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}
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# Controller Container Linux Config
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data "template_file" "controller_config" {
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count = "${var.controller_count}"
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template = "${file("${path.module}/cl/controller.yaml.tmpl")}"
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vars = {
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# Cannot use cyclic dependencies on controllers or their DNS records
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etcd_name = "etcd${count.index}"
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etcd_domain = "${var.cluster_name}-etcd${count.index}.${var.dns_zone}"
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# etcd0=https://cluster-etcd0.example.com,etcd1=https://cluster-etcd1.example.com,...
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etcd_initial_cluster = "${join(",", formatlist("%s=https://%s:2380", null_resource.repeat.*.triggers.name, null_resource.repeat.*.triggers.domain))}"
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k8s_dns_service_ip = "${cidrhost(var.service_cidr, 10)}"
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cluster_domain_suffix = "${var.cluster_domain_suffix}"
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}
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}
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# Horrible hack to generate a Terraform list of a desired length without dependencies.
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# Ideal ${repeat("etcd", 3) -> ["etcd", "etcd", "etcd"]}
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resource null_resource "repeat" {
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count = "${var.controller_count}"
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triggers {
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name = "etcd${count.index}"
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domain = "${var.cluster_name}-etcd${count.index}.${var.dns_zone}"
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}
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}
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data "ct_config" "controller_ign" {
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count = "${var.controller_count}"
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content = "${element(data.template_file.controller_config.*.rendered, count.index)}"
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pretty_print = false
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}
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