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2019177b6b
* Terraform v0.12 will require map assignments be explicit, part of v0.12 readiness
169 lines
5.5 KiB
HCL
169 lines
5.5 KiB
HCL
# Discrete DNS records for each controller's private IPv4 for etcd usage
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resource "azurerm_dns_a_record" "etcds" {
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count = "${var.controller_count}"
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resource_group_name = "${var.dns_zone_group}"
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# DNS Zone name where record should be created
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zone_name = "${var.dns_zone}"
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# DNS record
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name = "${format("%s-etcd%d", var.cluster_name, count.index)}"
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ttl = 300
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# private IPv4 address for etcd
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records = ["${element(azurerm_network_interface.controllers.*.private_ip_address, count.index)}"]
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}
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locals {
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# Channel for a Container Linux derivative
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# coreos-stable -> Container Linux Stable
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channel = "${element(split("-", var.os_image), 1)}"
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}
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# Controller availability set to spread controllers
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resource "azurerm_availability_set" "controllers" {
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resource_group_name = "${azurerm_resource_group.cluster.name}"
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name = "${var.cluster_name}-controllers"
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location = "${var.region}"
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platform_fault_domain_count = 2
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platform_update_domain_count = 4
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managed = true
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}
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# Controller instances
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resource "azurerm_virtual_machine" "controllers" {
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count = "${var.controller_count}"
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resource_group_name = "${azurerm_resource_group.cluster.name}"
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name = "${var.cluster_name}-controller-${count.index}"
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location = "${var.region}"
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availability_set_id = "${azurerm_availability_set.controllers.id}"
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vm_size = "${var.controller_type}"
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# boot
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storage_image_reference {
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publisher = "CoreOS"
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offer = "CoreOS"
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sku = "${local.channel}"
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version = "latest"
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}
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# storage
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storage_os_disk {
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name = "${var.cluster_name}-controller-${count.index}"
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create_option = "FromImage"
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caching = "ReadWrite"
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disk_size_gb = "${var.disk_size}"
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os_type = "Linux"
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managed_disk_type = "Premium_LRS"
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}
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# network
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network_interface_ids = ["${element(azurerm_network_interface.controllers.*.id, count.index)}"]
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os_profile {
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computer_name = "${var.cluster_name}-controller-${count.index}"
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admin_username = "core"
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custom_data = "${element(data.ct_config.controller-ignitions.*.rendered, count.index)}"
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}
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# Azure mandates setting an ssh_key, even though Ignition custom_data handles it too
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os_profile_linux_config {
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disable_password_authentication = true
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ssh_keys {
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path = "/home/core/.ssh/authorized_keys"
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key_data = "${var.ssh_authorized_key}"
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}
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}
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# lifecycle
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delete_os_disk_on_termination = true
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delete_data_disks_on_termination = true
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lifecycle {
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ignore_changes = [
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"storage_os_disk",
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"os_profile",
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]
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}
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}
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# Controller NICs with public and private IPv4
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resource "azurerm_network_interface" "controllers" {
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count = "${var.controller_count}"
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resource_group_name = "${azurerm_resource_group.cluster.name}"
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name = "${var.cluster_name}-controller-${count.index}"
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location = "${azurerm_resource_group.cluster.location}"
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network_security_group_id = "${azurerm_network_security_group.controller.id}"
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ip_configuration {
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name = "ip0"
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subnet_id = "${azurerm_subnet.controller.id}"
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private_ip_address_allocation = "dynamic"
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# public IPv4
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public_ip_address_id = "${element(azurerm_public_ip.controllers.*.id, count.index)}"
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}
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}
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# Add controller NICs to the controller backend address pool
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resource "azurerm_network_interface_backend_address_pool_association" "controllers" {
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network_interface_id = "${azurerm_network_interface.controllers.id}"
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ip_configuration_name = "ip0"
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backend_address_pool_id = "${azurerm_lb_backend_address_pool.controller.id}"
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}
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# Controller public IPv4 addresses
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resource "azurerm_public_ip" "controllers" {
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count = "${var.controller_count}"
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resource_group_name = "${azurerm_resource_group.cluster.name}"
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name = "${var.cluster_name}-controller-${count.index}"
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location = "${azurerm_resource_group.cluster.location}"
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sku = "Standard"
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allocation_method = "Static"
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}
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# Controller Ignition configs
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data "ct_config" "controller-ignitions" {
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count = "${var.controller_count}"
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content = "${element(data.template_file.controller-configs.*.rendered, count.index)}"
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pretty_print = false
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snippets = ["${var.controller_clc_snippets}"]
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}
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# Controller Container Linux configs
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data "template_file" "controller-configs" {
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count = "${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 = "${join(",", data.template_file.etcds.*.rendered)}"
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kubeconfig = "${indent(10, module.bootkube.kubeconfig-kubelet)}"
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ssh_authorized_key = "${var.ssh_authorized_key}"
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cluster_dns_service_ip = "${cidrhost(var.service_cidr, 10)}"
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cluster_domain_suffix = "${var.cluster_domain_suffix}"
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}
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}
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data "template_file" "etcds" {
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count = "${var.controller_count}"
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template = "etcd$${index}=https://$${cluster_name}-etcd$${index}.$${dns_zone}:2380"
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vars = {
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index = "${count.index}"
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cluster_name = "${var.cluster_name}"
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dns_zone = "${var.dns_zone}"
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}
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}
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