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

87 lines
2.4 KiB
HCL

locals {
official_images = []
is_official_image = contains(local.official_images, var.os_image)
}
# 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 = 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 = 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.os_image
size = var.controller_type
# network
vpc_uuid = digitalocean_vpc.network.id
# TODO: Only official DigitalOcean images support IPv6
ipv6 = false
user_data = data.ct_config.controllers.*.rendered[count.index]
ssh_keys = var.ssh_fingerprints
tags = [
digitalocean_tag.controllers.id,
]
lifecycle {
ignore_changes = [user_data]
}
}
# Tag to label controllers
resource "digitalocean_tag" "controllers" {
name = "${var.cluster_name}-controller"
}
# Flatcar Linux controllers
data "ct_config" "controllers" {
count = var.controller_count
content = templatefile("${path.module}/butane/controller.yaml", {
# 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(",", [
for i in range(var.controller_count) : "etcd${i}=https://${var.cluster_name}-etcd${i}.${var.dns_zone}:2380"
])
cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
cluster_domain_suffix = var.cluster_domain_suffix
})
strict = true
snippets = var.controller_snippets
}