typhoon/azure/container-linux/kubernetes/lb.tf

145 lines
4.3 KiB
HCL

# DNS record for the apiserver load balancer
resource "azurerm_dns_a_record" "apiserver" {
resource_group_name = "${var.dns_zone_group}"
# DNS Zone name where record should be created
zone_name = "${var.dns_zone}"
# DNS record
name = "${var.cluster_name}"
ttl = 300
# IPv4 address of apiserver load balancer
records = ["${azurerm_public_ip.apiserver-ipv4.ip_address}"]
}
# Static IPv4 address for the apiserver frontend
resource "azurerm_public_ip" "apiserver-ipv4" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "${var.cluster_name}-apiserver-ipv4"
location = "${var.region}"
sku = "Standard"
public_ip_address_allocation = "static"
}
# Static IPv4 address for the ingress frontend
resource "azurerm_public_ip" "ingress-ipv4" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "${var.cluster_name}-ingress-ipv4"
location = "${var.region}"
sku = "Standard"
public_ip_address_allocation = "static"
}
# Network Load Balancer for apiservers and ingress
resource "azurerm_lb" "cluster" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "${var.cluster_name}"
location = "${var.region}"
sku = "Standard"
frontend_ip_configuration {
name = "apiserver"
public_ip_address_id = "${azurerm_public_ip.apiserver-ipv4.id}"
}
frontend_ip_configuration {
name = "ingress"
public_ip_address_id = "${azurerm_public_ip.ingress-ipv4.id}"
}
}
resource "azurerm_lb_rule" "apiserver" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "apiserver"
loadbalancer_id = "${azurerm_lb.cluster.id}"
frontend_ip_configuration_name = "apiserver"
protocol = "Tcp"
frontend_port = 6443
backend_port = 6443
backend_address_pool_id = "${azurerm_lb_backend_address_pool.controller.id}"
probe_id = "${azurerm_lb_probe.apiserver.id}"
}
resource "azurerm_lb_rule" "ingress-http" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "ingress-http"
loadbalancer_id = "${azurerm_lb.cluster.id}"
frontend_ip_configuration_name = "ingress"
protocol = "Tcp"
frontend_port = 80
backend_port = 80
backend_address_pool_id = "${azurerm_lb_backend_address_pool.worker.id}"
probe_id = "${azurerm_lb_probe.ingress.id}"
}
resource "azurerm_lb_rule" "ingress-https" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "ingress-https"
loadbalancer_id = "${azurerm_lb.cluster.id}"
frontend_ip_configuration_name = "ingress"
protocol = "Tcp"
frontend_port = 443
backend_port = 443
backend_address_pool_id = "${azurerm_lb_backend_address_pool.worker.id}"
probe_id = "${azurerm_lb_probe.ingress.id}"
}
# Address pool of controllers
resource "azurerm_lb_backend_address_pool" "controller" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "controller"
loadbalancer_id = "${azurerm_lb.cluster.id}"
}
# Address pool of workers
resource "azurerm_lb_backend_address_pool" "worker" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "worker"
loadbalancer_id = "${azurerm_lb.cluster.id}"
}
# Health checks / probes
# TCP health check for apiserver
resource "azurerm_lb_probe" "apiserver" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "apiserver"
loadbalancer_id = "${azurerm_lb.cluster.id}"
protocol = "Tcp"
port = 6443
# unhealthy threshold
number_of_probes = 3
interval_in_seconds = 5
}
# HTTP health check for ingress
resource "azurerm_lb_probe" "ingress" {
resource_group_name = "${azurerm_resource_group.cluster.name}"
name = "ingress"
loadbalancer_id = "${azurerm_lb.cluster.id}"
protocol = "Http"
port = 10254
request_path = "/healthz"
# unhealthy threshold
number_of_probes = 3
interval_in_seconds = 5
}