Add required_providers block, renamed files

aks-cluster.tf

@@ -2,7 +2,6 @@ resource "random_pet" "prefix" {}
 
 provider "azurerm" {
   version = "~> 2.0"
-  features {}
 }
 
 resource "azurerm_resource_group" "default" {

outputs.tf

@@ -7,11 +7,11 @@ output "kubernetes_cluster_name" {
 }
 
 output "host" {
-    value = azurerm_kubernetes_cluster.default.kube_config.0.host
+  value = azurerm_kubernetes_cluster.default.kube_config.0.host
 }
 
 output "client_key" {
-    value = azurerm_kubernetes_cluster.default.kube_config.0.client_key
+  value = azurerm_kubernetes_cluster.default.kube_config.0.client_key
 }
 
 output "client_certificate" {
@@ -23,9 +23,9 @@ output "kube_config" {
 }
 
 output "cluster_username" {
-    value = azurerm_kubernetes_cluster.default.kube_config.0.username
+  value = azurerm_kubernetes_cluster.default.kube_config.0.username
 }
 
 output "cluster_password" {
-    value = azurerm_kubernetes_cluster.default.kube_config.0.password
+  value = azurerm_kubernetes_cluster.default.kube_config.0.password
 }

providers.tf

@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 0.13"
+
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "2.25.0"
+    }
+  }
+}

vars.tf → variables.tf

@@ -1,5 +1,3 @@
-#Variables declaration
-
 variable "appId" {
   description = "Azure Kubernetes Service Cluster service principal"
 }