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73126eb7f8
* Allow groups of workers to be defined and joined to a cluster (i.e. worker pools) * Move worker resources into a Terraform submodule * Output variables needed for passing to worker pools * Add usage docs for AWS worker pools (advanced)
82 lines
2.5 KiB
HCL
82 lines
2.5 KiB
HCL
# Discrete DNS records for each controller's private IPv4 for etcd usage
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resource "aws_route53_record" "etcds" {
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count = "${var.controller_count}"
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# DNS Zone where record should be created
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zone_id = "${var.dns_zone_id}"
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name = "${format("%s-etcd%d.%s.", var.cluster_name, count.index, var.dns_zone)}"
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type = "A"
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ttl = 300
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# private IPv4 address for etcd
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records = ["${element(aws_instance.controllers.*.private_ip, count.index)}"]
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}
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# Controller instances
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resource "aws_instance" "controllers" {
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count = "${var.controller_count}"
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tags = {
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Name = "${var.cluster_name}-controller-${count.index}"
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}
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instance_type = "${var.controller_type}"
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ami = "${data.aws_ami.coreos.image_id}"
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user_data = "${element(data.ct_config.controller_ign.*.rendered, count.index)}"
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# storage
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root_block_device {
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volume_type = "standard"
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volume_size = "${var.disk_size}"
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}
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# network
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associate_public_ip_address = true
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subnet_id = "${element(aws_subnet.public.*.id, count.index)}"
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vpc_security_group_ids = ["${aws_security_group.controller.id}"]
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lifecycle {
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ignore_changes = ["ami"]
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}
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}
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# Controller Container Linux Config
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data "template_file" "controller_config" {
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count = "${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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ssh_authorized_key = "${var.ssh_authorized_key}"
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cluster_domain_suffix = "${var.cluster_domain_suffix}"
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kubeconfig = "${indent(10, module.bootkube.kubeconfig)}"
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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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