feat: adding Azure Network module

examples/azure/README.md

@@ -1,13 +1,13 @@
 # Terratest Configuration and Setup
 
-Terratest uses Go to make calls to Azure through the azure-sdk-for-go library and independently confirm the actual Azure resource property matches the expected state provided by Terraform output variables. 
+Terratest uses Go to make calls to Azure through the azure-sdk-for-go library and independently confirm the actual Azure resource property matches the expected state provided by Terraform output variables.
 
-* Instructions for running each Azure Terratest module are included in each Terraform example sub-folder:
-    * examples/azure/terraform-azure-*-example/README.md
-* Tests wich assert against expected Terraform output values are located in the the respective go files of the folder:
-    * [test/azure/terraform-azure-*-example_test.go](../../test/azure)
-* Test APIs which provide the actual Azure resource property values via the azure-sdk-for-go are located in the folder:
-    * [modules/azure](../../modules/azure)
+- Instructions for running each Azure Terratest module are included in each Terraform example sub-folder:
+  - examples/azure/terraform-azure-\*-example/README.md
+- Tests which assert against expected Terraform output values are located in the the respective go files of the folder:
+  - [test/azure/terraform-azure-\*-example_test.go](../../test/azure)
+- Test APIs which provide the actual Azure resource property values via the azure-sdk-for-go are located in the folder:
+  - [modules/azure](../../modules/azure)
 
 ## Go Dependencies
 
@@ -44,7 +44,7 @@ export ARM_SUBSCRIPTION_ID=your_subscription_id
 export ARM_TENANT_ID=your_tenant_id
 ```
 
-Note, in a Windows environment, these should be set as **system environment variables**.  We can use a PowerShell console with administrative rights to update these environment variables:
+Note, in a Windows environment, these should be set as **system environment variables**. We can use a PowerShell console with administrative rights to update these environment variables:
 
 ```powershell
 [System.Environment]::SetEnvironmentVariable("ARM_CLIENT_ID",$your_app_id,[System.EnvironmentVariableTarget]::Machine)

examples/azure/terraform-azure-network-example/README.md

@@ -0,0 +1,43 @@
+# Terraform Azure Network Example
+
+This folder contains a simple Terraform module that deploys resources in [Azure](https://azure.microsoft.com/) to demonstrate
+how you can use Terratest to write automated tests for your Azure Terraform code. This module deploys to a Virtual Network two Network Interface Cards, one with an internal only IP and another with an internal and external Public IP.
+
+- A [Virtual Network](https://azure.microsoft.com/en-us/services/virtual-network/) module that includes the following resources:
+  - [Virtual Network](https://docs.microsoft.com/en-us/azure/virtual-network/) with the name specified in the `virtual_network_name` variable.
+  - [Subnet](https://docs.microsoft.com/en-us/rest/api/virtualnetwork/subnets) with the name specified in the `subnet_name` variable.
+  - [Public Address](https://docs.microsoft.com/en-us/azure/virtual-network/public-ip-addresses) with the name specified in the `public_ip_name` variable.
+  - [Internal Network Interface](https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-network-interface) with the name specified in the `network_interface_internal` variable.
+  - [ExternalNetwork Interface](https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-network-interface) with the name specified in the `network_interface_external` variable.
+
+Check out [test/azure/terraform_azure_network_test.go](/test/azure/terraform_azure_network_example_test.go) to see how you can write
+automated tests for this module.
+
+Note that the Azure Virtual Network, Subnet, Network Interface and Public IP resources in this module don't actually do anything; it just runs the resources for
+demonstration purposes.
+
+**WARNING**: This module and the automated tests for it deploy real resources into your Azure account which can cost you
+money. The resources are all part of the [Azure Free Account](https://azure.microsoft.com/en-us/free/), so if you haven't used that up,
+it should be free, but you are completely responsible for all Azure charges.
+
+## Running this module manually
+
+1. Sign up for [Azure](https://azure.microsoft.com/)
+1. Configure your Azure credentials using one of the [supported methods for Azure CLI
+   tools](https://docs.microsoft.com/en-us/cli/azure/azure-cli-configuration?view=azure-cli-latest)
+1. Install [Terraform](https://www.terraform.io/) and make sure it's on your `PATH`
+1. Ensure [environment variables](../README.md#review-environment-variables) are available
+1. Run `terraform init`
+1. Run `terraform apply`
+1. When you're done, run `terraform destroy`
+
+## Running automated tests against this module
+
+1. Sign up for [Azure](https://azure.microsoft.com/)
+1. Configure your Azure credentials using one of the [supported methods for Azure CLI
+   tools](https://docs.microsoft.com/en-us/cli/azure/azure-cli-configuration?view=azure-cli-latest)
+1. Install [Terraform](https://www.terraform.io/) and make sure it's on your `PATH`
+1. Configure your Terratest [Go test environment](../README.md)
+1. `cd test/azure`
+1. `go build terraform_azure_network_example_test.go`
+1. `go test -v -run TestTerraformAzureNetworkExample`

examples/azure/terraform-azure-network-example/main.tf

@@ -0,0 +1,98 @@
+# ---------------------------------------------------------------------------------------------------------------------
+# DEPLOY AN AZURE NETWORK
+# This is an example of how to deploy frequent Azure Networking Resources. Note this network doesn't actually do
+# anything and is only created for the example to test their commonly needed and integrated properties.
+# ---------------------------------------------------------------------------------------------------------------------
+# See test/azure/terraform_azure_network_example_test.go for how to write automated tests for this code.
+# ---------------------------------------------------------------------------------------------------------------------
+
+provider "azurerm" {
+  version = "~>2.20"
+  features {}
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# PIN TERRAFORM VERSION TO >= 0.12
+# The examples have been upgraded to 0.12 syntax
+# ---------------------------------------------------------------------------------------------------------------------
+
+terraform {
+  # This module is now only being tested with Terraform 0.13.x. However, to make upgrading easier, we are setting
+  # 0.12.26 as the minimum version, as that version added support for required_providers with source URLs, making it
+  # forwards compatible with 0.13.x code.
+  required_version = ">= 0.12.26"
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# DEPLOY A RESOURCE GROUP
+# ---------------------------------------------------------------------------------------------------------------------
+
+resource "azurerm_resource_group" "net" {
+  name     = "terratest-network-rg-${var.postfix}"
+  location = var.location
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# DEPLOY VIRTUAL NETWORK
+# ---------------------------------------------------------------------------------------------------------------------
+
+resource "azurerm_virtual_network" "net" {
+  name                = "vnet-${var.postfix}"
+  location            = azurerm_resource_group.net.location
+  resource_group_name = azurerm_resource_group.net.name
+  address_space       = ["10.0.0.0/16"]
+  dns_servers         = [var.dns_ip_01, var.dns_ip_02]
+}
+
+resource "azurerm_subnet" "net" {
+  name                 = "subnet-${var.postfix}"
+  resource_group_name  = azurerm_resource_group.net.name
+  virtual_network_name = azurerm_virtual_network.net.name
+  address_prefixes     = [var.subnet_prefix]
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# DEPLOY PRIVATE NETWORK INTERFACE
+# ---------------------------------------------------------------------------------------------------------------------
+
+resource "azurerm_network_interface" "net01" {
+  name                = "nic-private-${var.postfix}"
+  location            = azurerm_resource_group.net.location
+  resource_group_name = azurerm_resource_group.net.name
+
+  ip_configuration {
+    name                          = "terratestconfiguration1"
+    subnet_id                     = azurerm_subnet.net.id
+    private_ip_address_allocation = "Static"
+    private_ip_address            = var.private_ip
+  }
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# DEPLOY PUBLIC ADDRESS AND NETWORK INTERFACE
+# ---------------------------------------------------------------------------------------------------------------------
+
+resource "azurerm_public_ip" "net" {
+  name                    = "pip-${var.postfix}"
+  resource_group_name     = azurerm_resource_group.net.name
+  location                = azurerm_resource_group.net.location
+  allocation_method       = "Static"
+  ip_version              = "IPv4"
+  sku                     = "Basic"
+  idle_timeout_in_minutes = "4"
+  domain_name_label       = var.domain_name_label
+}
+
+resource "azurerm_network_interface" "net02" {
+  name                = "nic-public-${var.postfix}"
+  location            = azurerm_resource_group.net.location
+  resource_group_name = azurerm_resource_group.net.name
+
+  ip_configuration {
+    name                          = "terratestconfiguration1"
+    subnet_id                     = azurerm_subnet.net.id
+    private_ip_address_allocation = "Dynamic"
+    public_ip_address_id          = azurerm_public_ip.net.id
+  }
+}
+

examples/azure/terraform-azure-network-example/outputs.tf

@@ -0,0 +1,25 @@
+output "resource_group_name" {
+  value = azurerm_resource_group.net.name
+}
+
+output "virtual_network_name" {
+  value = azurerm_virtual_network.net.name
+}
+
+output "subnet_name" {
+  value = azurerm_subnet.net.name
+}
+
+output "public_address_name" {
+  value = azurerm_public_ip.net.name
+}
+
+output "network_interface_internal" {
+  value = azurerm_network_interface.net01.name
+}
+
+output "network_interface_external" {
+  value = azurerm_network_interface.net02.name
+}
+
+

examples/azure/terraform-azure-network-example/variables.tf

@@ -0,0 +1,60 @@
+# ---------------------------------------------------------------------------------------------------------------------
+# ENVIRONMENT VARIABLES
+# Define these secrets as environment variables
+# ---------------------------------------------------------------------------------------------------------------------
+
+# ARM_CLIENT_ID
+# ARM_CLIENT_SECRET
+# ARM_SUBSCRIPTION_ID
+# ARM_TENANT_ID
+
+# ---------------------------------------------------------------------------------------------------------------------
+# REQUIRED PARAMETERS
+# You must provide a value for each of these parameters.
+# ---------------------------------------------------------------------------------------------------------------------
+
+variable "domain_name_label" {
+  description = "The Domain Name Label for the Public IP Address"
+  type        = string
+}
+
+# ---------------------------------------------------------------------------------------------------------------------
+# OPTIONAL PARAMETERS
+# These parameters have reasonable defaults.
+# ---------------------------------------------------------------------------------------------------------------------
+
+variable "dns_ip_01" {
+  description = "The first DNS Server IP for the Virtual Network"
+  type        = string
+  default     = "10.0.0.5"
+}
+
+variable "dns_ip_02" {
+  description = "The second DNS Server IP for the Virtual Network"
+  type        = string
+  default     = "10.0.0.6"
+}
+
+variable "location" {
+  description = "The Azure Region to deploy resources too"
+  type        = string
+  default     = "East US"
+}
+
+variable "postfix" {
+  description = "The postfix that will be attached to all resources deployed"
+  type        = string
+  default     = "resource"
+}
+
+variable "private_ip" {
+  description = "The Static Private IP for the Internal NIC"
+  type        = string
+  default     = "10.0.20.5"
+}
+
+variable "subnet_prefix" {
+  description = "The subnet range of IPs for the Virtual Network"
+  type        = string
+  default     = "10.0.20.0/24"
+}

modules/azure/availabilityset.go

@@ -21,6 +21,9 @@ func AvailabilitySetExists(t testing.TestingT, avsName string, resGroupName stri
 func AvailabilitySetExistsE(t testing.TestingT, avsName string, resGroupName string, subscriptionID string) (bool, error) {
 	_, err := GetAvailabilitySetE(t, avsName, resGroupName, subscriptionID)
 	if err != nil {
+		if ResourceNotFoundErrorExists(err) {
+			return false, nil
+		}
 		return false, err
 	}
 	return true, nil

modules/azure/compute.go

@@ -8,7 +8,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// GetVirtualMachineClientE is a helper function that will setup an Azure Virtual Machine client on your behalf
+// GetVirtualMachineClientE is a helper function that will setup an Azure Virtual Machine client on your behalf.
 func GetVirtualMachineClientE(subscriptionID string) (*compute.VirtualMachinesClient, error) {
 	// Validate Azure subscription ID
 	subscriptionID, err := getTargetAzureSubscription(subscriptionID)

modules/azure/errors.go

@@ -1,6 +1,11 @@
 package azure
 
-import "fmt"
+import (
+	"fmt"
+
+	"github.com/Azure/go-autorest/autorest"
+	"github.com/Azure/go-autorest/autorest/azure"
+)
 
 // SubscriptionIDNotFound is an error that occurs when the Azure Subscription ID could not be found or was not provided
 type SubscriptionIDNotFound struct{}
@@ -16,6 +21,21 @@ func (err ResourceGroupNameNotFound) Error() string {
 	return fmt.Sprintf("Could not find an Azure Resource Group name in expected environment variable %s and one was not provided for this test.", AzureResGroupName)
 }
 
+// FailedToParseError is returned when an object cannot be parsed
+type FailedToParseError struct {
+	objectType string
+	objectID   string
+}
+
+func (err FailedToParseError) Error() string {
+	return fmt.Sprintf("Failed to parse %s with ID %s", err.objectType, err.objectID)
+}
+
+// NewFailedToParseError creates a new not found error when an expected object is not found in the search space
+func NewFailedToParseError(objectType string, objectID string) FailedToParseError {
+	return FailedToParseError{objectType, objectID}
+}
+
 // NotFoundError is returned when an expected object is not found in the search spa
 type NotFoundError struct {
 	objectType  string
@@ -31,3 +51,15 @@ func (err NotFoundError) Error() string {
 func NewNotFoundError(objectType string, objectID string, region string) NotFoundError {
 	return NotFoundError{objectType, objectID, region}
 }
+
+// ResourceNotFoundErrorExists checks the Service Error Code for the 'Resource Not Found' error
+func ResourceNotFoundErrorExists(err error) bool {
+	if err != nil {
+		if autorestError, ok := err.(autorest.DetailedError); ok {
+			if requestError, ok := autorestError.Original.(*azure.RequestError); ok {
+				return (requestError.ServiceError.Code == "ResourceNotFound")
+			}
+		}
+	}
+	return false
+}