Rename Azure cluster region variable to location

* Rename the region variable to location to align with Azure
platform conventions, where resources are created within an
Azure location, which are themselves part of broader geographical
regions

azure/flatcar-linux/kubernetes/controllers.tf

@@ -32,7 +32,7 @@ resource "azurerm_dns_a_record" "etcds" {
 resource "azurerm_availability_set" "controllers" {
   name                         = "${var.cluster_name}-controllers"
   resource_group_name          = azurerm_resource_group.cluster.name
-  location                     = var.region
+  location                     = var.location
   platform_fault_domain_count  = 2
   platform_update_domain_count = 4
   managed                      = true
@@ -44,7 +44,7 @@ resource "azurerm_linux_virtual_machine" "controllers" {
 
   name                = "${var.cluster_name}-controller-${count.index}"
   resource_group_name = azurerm_resource_group.cluster.name
-  location            = var.region
+  location            = var.location
   availability_set_id = azurerm_availability_set.controllers.id
   size                = var.controller_type
 

azure/flatcar-linux/kubernetes/lb.tf

@@ -17,7 +17,7 @@ resource "azurerm_dns_a_record" "apiserver" {
 resource "azurerm_public_ip" "apiserver-ipv4" {
   name                = "${var.cluster_name}-apiserver-ipv4"
   resource_group_name = azurerm_resource_group.cluster.name
-  location            = var.region
+  location            = var.location
   sku                 = "Standard"
   allocation_method   = "Static"
 }
@@ -26,7 +26,7 @@ resource "azurerm_public_ip" "apiserver-ipv4" {
 resource "azurerm_public_ip" "ingress-ipv4" {
   name                = "${var.cluster_name}-ingress-ipv4"
   resource_group_name = azurerm_resource_group.cluster.name
-  location            = var.region
+  location            = var.location
   ip_version          = "IPv4"
   sku                 = "Standard"
   allocation_method   = "Static"
@@ -36,7 +36,7 @@ resource "azurerm_public_ip" "ingress-ipv4" {
 resource "azurerm_public_ip" "ingress-ipv6" {
   name                = "${var.cluster_name}-ingress-ipv6"
   resource_group_name = azurerm_resource_group.cluster.name
-  location            = var.region
+  location            = var.location
   ip_version          = "IPv6"
   sku                 = "Standard"
   allocation_method   = "Static"
@@ -46,7 +46,7 @@ resource "azurerm_public_ip" "ingress-ipv6" {
 resource "azurerm_lb" "cluster" {
   name                = var.cluster_name
   resource_group_name = azurerm_resource_group.cluster.name
-  location            = var.region
+  location            = var.location
   sku                 = "Standard"
 
   frontend_ip_configuration {

azure/flatcar-linux/kubernetes/network.tf

@@ -19,7 +19,7 @@ locals {
 # Organize cluster into a resource group
 resource "azurerm_resource_group" "cluster" {
   name     = var.cluster_name
-  location = var.region
+  location = var.location
 }
 
 resource "azurerm_virtual_network" "network" {

azure/flatcar-linux/kubernetes/outputs.tf

@@ -17,7 +17,7 @@ output "ingress_static_ipv6" {
 
 # Outputs for worker pools
 
-output "region" {
+output "location" {
   value = azurerm_resource_group.cluster.location
 }
 

azure/flatcar-linux/kubernetes/variables.tf

@@ -5,9 +5,9 @@ variable "cluster_name" {
 
 # Azure
 
-variable "region" {
+variable "location" {
   type        = string
-  description = "Azure Region (e.g. centralus , see `az account list-locations --output table`)"
+  description = "Azure location (e.g. centralus , see `az account list-locations --output table`)"
 }
 
 variable "dns_zone" {

azure/flatcar-linux/kubernetes/workers.tf

@@ -4,7 +4,7 @@ module "workers" {
 
   # Azure
   resource_group_name      = azurerm_resource_group.cluster.name
-  region                   = azurerm_resource_group.cluster.location
+  location                 = azurerm_resource_group.cluster.location
   subnet_id                = azurerm_subnet.worker.id
   security_group_id        = azurerm_network_security_group.worker.id
   backend_address_pool_ids = local.backend_address_pool_ids

azure/flatcar-linux/kubernetes/workers/variables.tf

@@ -5,9 +5,9 @@ variable "name" {
 
 # Azure
 
-variable "region" {
+variable "location" {
   type        = string
-  description = "Must be set to the Azure Region of cluster"
+  description = "Must be set to the Azure location of cluster"
 }
 
 variable "resource_group_name" {

azure/flatcar-linux/kubernetes/workers/workers.tf

@@ -11,7 +11,7 @@ locals {
 resource "azurerm_linux_virtual_machine_scale_set" "workers" {
   name                = "${var.name}-worker"
   resource_group_name = var.resource_group_name
-  location            = var.region
+  location            = var.location
   sku                 = var.vm_type
   instances           = var.worker_count
   # instance name prefix for instances in the set
@@ -91,7 +91,7 @@ resource "azurerm_linux_virtual_machine_scale_set" "workers" {
 resource "azurerm_monitor_autoscale_setting" "workers" {
   name                = "${var.name}-maintain-desired"
   resource_group_name = var.resource_group_name
-  location            = var.region
+  location            = var.location
   # autoscale
   enabled            = true
   target_resource_id = azurerm_linux_virtual_machine_scale_set.workers.id