typhoon/aws/fedora-atomic/kubernetes/controllers.tf

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# Discrete DNS records for each controller's private IPv4 for etcd usage
resource "aws_route53_record" "etcds" {
count = "${var.controller_count}"
# DNS Zone where record should be created
zone_id = "${var.dns_zone_id}"
name = "${format("%s-etcd%d.%s.", var.cluster_name, count.index, var.dns_zone)}"
type = "A"
ttl = 300
# private IPv4 address for etcd
records = ["${element(aws_instance.controllers.*.private_ip, count.index)}"]
}
# Controller instances
resource "aws_instance" "controllers" {
count = "${var.controller_count}"
tags = {
Name = "${var.cluster_name}-controller-${count.index}"
}
instance_type = "${var.controller_type}"
ami = "${data.aws_ami.fedora.image_id}"
user_data = "${element(data.template_file.controller-cloudinit.*.rendered, count.index)}"
# storage
root_block_device {
volume_type = "${var.disk_type}"
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volume_size = "${var.disk_size}"
iops = "${var.disk_iops}"
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}
# network
associate_public_ip_address = true
subnet_id = "${element(aws_subnet.public.*.id, count.index)}"
vpc_security_group_ids = ["${aws_security_group.controller.id}"]
lifecycle {
ignore_changes = [
"ami",
"user_data",
]
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}
}
# Controller Cloud-Init
data "template_file" "controller-cloudinit" {
count = "${var.controller_count}"
template = "${file("${path.module}/cloudinit/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 = "${join(",", data.template_file.etcds.*.rendered)}"
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kubeconfig = "${indent(6, module.bootkube.kubeconfig-kubelet)}"
ssh_authorized_key = "${var.ssh_authorized_key}"
cluster_dns_service_ip = "${cidrhost(var.service_cidr, 10)}"
cluster_domain_suffix = "${var.cluster_domain_suffix}"
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}
}
data "template_file" "etcds" {
count = "${var.controller_count}"
template = "etcd$${index}=https://$${cluster_name}-etcd$${index}.$${dns_zone}:2380"
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vars {
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index = "${count.index}"
cluster_name = "${var.cluster_name}"
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dns_zone = "${var.dns_zone}"
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}
}