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

94 lines
2.8 KiB
HCL

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