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

94 lines
2.4 KiB
HCL

# Network Load Balancer DNS Record
resource "aws_route53_record" "apiserver" {
zone_id = "${var.dns_zone_id}"
name = "${format("%s.%s.", var.cluster_name, var.dns_zone)}"
type = "A"
# AWS recommends their special "alias" records for NLBs
alias {
name = "${aws_lb.nlb.dns_name}"
zone_id = "${aws_lb.nlb.zone_id}"
evaluate_target_health = true
}
}
# Network Load Balancer for apiservers and ingress
resource "aws_lb" "nlb" {
name = "${var.cluster_name}-nlb"
load_balancer_type = "network"
internal = false
subnets = ["${aws_subnet.public.*.id}"]
enable_cross_zone_load_balancing = true
}
# Forward TCP apiserver traffic to controllers
resource "aws_lb_listener" "apiserver-https" {
load_balancer_arn = "${aws_lb.nlb.arn}"
protocol = "TCP"
port = "6443"
default_action {
type = "forward"
target_group_arn = "${aws_lb_target_group.controllers.arn}"
}
}
# Forward HTTP ingress traffic to workers
resource "aws_lb_listener" "ingress-http" {
load_balancer_arn = "${aws_lb.nlb.arn}"
protocol = "TCP"
port = 80
default_action {
type = "forward"
target_group_arn = "${module.workers.target_group_http}"
}
}
# Forward HTTPS ingress traffic to workers
resource "aws_lb_listener" "ingress-https" {
load_balancer_arn = "${aws_lb.nlb.arn}"
protocol = "TCP"
port = 443
default_action {
type = "forward"
target_group_arn = "${module.workers.target_group_https}"
}
}
# Target group of controllers
resource "aws_lb_target_group" "controllers" {
name = "${var.cluster_name}-controllers"
vpc_id = "${aws_vpc.network.id}"
target_type = "instance"
protocol = "TCP"
port = 6443
# TCP health check for apiserver
health_check {
protocol = "TCP"
port = 6443
# NLBs required to use same healthy and unhealthy thresholds
healthy_threshold = 3
unhealthy_threshold = 3
# Interval between health checks required to be 10 or 30
interval = 10
}
}
# Attach controller instances to apiserver NLB
resource "aws_lb_target_group_attachment" "controllers" {
count = "${var.controller_count}"
target_group_arn = "${aws_lb_target_group.controllers.arn}"
target_id = "${element(aws_instance.controllers.*.id, count.index)}"
port = 6443
}