Added randomness of rg name, links to ref docs

Author: TomArcherMsft

quickstart/101-resource-group/main.tf

@@ -14,7 +14,9 @@ provider "azurerm" {
   features {}
 }
 
+resource "random_uuid" "uuid" {}
+
 resource "azurerm_resource_group" "rg" {
-  name = var.resource_group_name
-  location = var.resource_group_location
-}
+  name      = "${var.resource_group_name_prefix}-${random_uuid.uuid.result}"
+  location  = var.resource_group_location
+}

quickstart/101-resource-group/output.tf

@@ -0,0 +1,3 @@
+output "resource_group_name" {
+    value = azurerm_resource_group.rg.name
+}

quickstart/101-resource-group/readme.md

@@ -1,20 +1,18 @@
 # Azure resource group
 
-This template deploys an Azure resource group.
+This template deploys an Azure resource group with a random name beginning with "rg-".
 
-## Resources
+## Terraform resource types
 
-| Terraform Resource Type | Description |
-| - | - |
-| `azurerm_resource_group` | The resource group all resources are deployed into |
+- [random_uuid](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/uuid)
+- [azurerm_resource_group](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/resource_group)
 
 ## Variables
 
 | Name | Description |
 |-|-|
-| `name` | Name of the deployment |
-| `environment` | The depolyment environment name (used for postfixing resource names) |
-| `location` | The Azure Region to deploy these resources in |
+| `resource_group_name_prefix` | Prefix of the resource group name that's combined with a random number so name is unique in your Azure subscription. |
+| `resource_group_location` | The Azure Region to deploy these resources in |
 
 ## Example
 

quickstart/101-resource-group/variables.tf

@@ -1,5 +1,6 @@
-variable "resource_group_name" {
-  default = "myResourceGroup"
+variable "resource_group_name_prefix" {
+  default       = "rg"
+  description   = "Prefix of the resource group name that's combined with a random number so name is unique in your Azure subscription."
 }
 
 variable "resource_group_location" {