added terraform for create a virtual network with two subnets quickstart in virtual network docset

quickstart/101-virtual-network-create-two-subnets/main.tf

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+# Resource Group
+resource "azurerm_resource_group" "rg" {
+  location = var.resource_group_location
+  name     = "${random_pet.prefix.id}-rg"
+}
+
+# Virtual Network
+resource "azurerm_virtual_network" "my_terraform_network" {
+  name                = "${random_pet.prefix.id}-vnet"
+  address_space       = ["10.0.0.0/16"]
+  location            = azurerm_resource_group.rg.location
+  resource_group_name = azurerm_resource_group.rg.name
+}
+
+# Subnet 1
+resource "azurerm_subnet" "my_terraform_subnet_1" {
+  name                 = "subnet-1"
+  resource_group_name  = azurerm_resource_group.rg.name
+  virtual_network_name = azurerm_virtual_network.my_terraform_network.name
+  address_prefixes     = ["10.0.0.0/24"]
+}
+
+# Subnet 2
+resource "azurerm_subnet" "my_terraform_subnet_2" {
+  name                 = "subnet-2"
+  resource_group_name  = azurerm_resource_group.rg.name
+  virtual_network_name = azurerm_virtual_network.my_terraform_network.name
+  address_prefixes     = ["10.0.1.0/24"]
+}
+
+resource "random_pet" "prefix" {
+  prefix = var.prefix
+  length = 1
+}

quickstart/101-virtual-network-create-two-subnets/outputs.tf

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+output "resource_group_name" {
+  description = "The name of the created resource group."
+  value       = azurerm_resource_group.rg.name
+}
+
+output "virtual_network_name" {
+  description = "The name of the created virtual network."
+  value       = azurerm_virtual_network.my_terraform_network.name
+}
+
+output "subnet_name_1" {
+  description = "The name of the created subnet 1."
+  value       = azurerm_subnet.my_terraform_subnet_1.name
+}
+
+output "subnet_name_2" {
+  description = "The name of the created subnet 2."
+  value       = azurerm_subnet.my_terraform_subnet_2.name
+}

quickstart/101-virtual-network-create-two-subnets/providers.tf

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+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "~>3.0"
+    }
+    random = {
+      source  = "hashicorp/random"
+      version = "~>3.0"
+    }
+  }
+}
+
+provider "azurerm" {
+  features {}
+}

quickstart/101-virtual-network-create-two-subnets/readme.md

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+# Azure resource group
+
+This template deploys an Azure resource group with a random name beginning with "rg-".
+
+## Terraform resource types
+
+- [random_pet](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/pet)
+- [azurerm_resource_group](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/resource_group)
+
+## Variables
+
+| Name | Description | Default |
+|-|-|-|
+| `resource_group_name_prefix` | Prefix of the resource group name that's combined with a random ID so name is unique in your Azure subscription. | rg |
+| `resource_group_location` | Location of the resource group. | eastus |
+
+## Example
+
+To see how to run this example, see [Create an Azure resource group using Terraform](https://docs.microsoft.com/azure/developer/terraform/create-resource-group).

quickstart/101-virtual-network-create-two-subnets/variables.tf

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+variable "resource_group_location" {
+  type        = string
+  default     = "eastus"
+  description = "Location of the resource group."
+}
+
+variable "prefix" {
+  type        = string
+  default     = "rg"
+  description = "Prefix of the resource group name that's combined with a random ID so name is unique in your Azure subscription."
+}
+
+variable "vnet_address_space" {
+  type        = list(string)
+  default     = ["10.0.0.0/16"]
+  description = "Address space for the virtual network."
+}