feat: allow subscription cancellation to be disabled via a feature flag

internal/features/defaults.go

@@ -53,5 +53,8 @@ func Default() UserFeatures {
 			RollInstancesWhenRequired: true,
 			ScaleToZeroOnDelete:       true,
 		},
+		Subscription: SubscriptionFeatures{
+			PreventCancellationOnDestroy: false,
+		},
 	}
 }

internal/features/user_flags.go

@@ -15,6 +15,7 @@ type UserFeatures struct {
 	LogAnalyticsWorkspace  LogAnalyticsWorkspaceFeatures
 	ResourceGroup          ResourceGroupFeatures
 	ManagedDisk            ManagedDiskFeatures
+	Subscription           SubscriptionFeatures
 }
 
 type CognitiveAccountFeatures struct {
@@ -74,3 +75,7 @@ type AppConfigurationFeatures struct {
 	PurgeSoftDeleteOnDestroy bool
 	RecoverSoftDeleted       bool
 }
+
+type SubscriptionFeatures struct {
+	PreventCancellationOnDestroy bool
+}

internal/provider/features.go

@@ -268,6 +268,21 @@ func schemaFeatures(supportLegacyTestSuite bool) *pluginsdk.Schema {
 				},
 			},
 		},
+
+		"subscription": {
+			Type:     pluginsdk.TypeList,
+			Optional: true,
+			MaxItems: 1,
+			Elem: &pluginsdk.Resource{
+				Schema: map[string]*pluginsdk.Schema{
+					"prevent_cancellation_on_destroy": {
+						Type:     pluginsdk.TypeBool,
+						Optional: true,
+						Default:  false,
+					},
+				},
+			},
+		},
 	}
 
 	// this is a temporary hack to enable us to gradually add provider blocks to test configurations
@@ -455,5 +470,15 @@ func expandFeatures(input []interface{}) features.UserFeatures {
 		}
 	}
 
+	if raw, ok := val["subscription"]; ok {
+		items := raw.([]interface{})
+		if len(items) > 0 {
+			subscriptionRaw := items[0].(map[string]interface{})
+			if v, ok := subscriptionRaw["prevent_cancellation_on_destroy"]; ok {
+				featuresMap.Subscription.PreventCancellationOnDestroy = v.(bool)
+			}
+		}
+	}
+
 	return featuresMap
 }

internal/provider/features_test.go

@@ -68,6 +68,9 @@ func TestExpandFeatures(t *testing.T) {
 				ResourceGroup: features.ResourceGroupFeatures{
 					PreventDeletionIfContainsResources: true,
 				},
+				Subscription: features.SubscriptionFeatures{
+					PreventCancellationOnDestroy: false,
+				},
 			},
 		},
 		{
@@ -124,6 +127,11 @@ func TestExpandFeatures(t *testing.T) {
 							"prevent_deletion_if_contains_resources": true,
 						},
 					},
+					"subscription": []interface{}{
+						map[string]interface{}{
+							"prevent_cancellation_on_destroy": true,
+						},
+					},
 					"template_deployment": []interface{}{
 						map[string]interface{}{
 							"delete_nested_items_during_deletion": true,
@@ -180,6 +188,9 @@ func TestExpandFeatures(t *testing.T) {
 				ResourceGroup: features.ResourceGroupFeatures{
 					PreventDeletionIfContainsResources: true,
 				},
+				Subscription: features.SubscriptionFeatures{
+					PreventCancellationOnDestroy: true,
+				},
 				TemplateDeployment: features.TemplateDeploymentFeatures{
 					DeleteNestedItemsDuringDeletion: true,
 				},
@@ -249,6 +260,11 @@ func TestExpandFeatures(t *testing.T) {
 							"prevent_deletion_if_contains_resources": false,
 						},
 					},
+					"subscription": []interface{}{
+						map[string]interface{}{
+							"prevent_cancellation_on_destroy": false,
+						},
+					},
 					"template_deployment": []interface{}{
 						map[string]interface{}{
 							"delete_nested_items_during_deletion": false,
@@ -305,6 +321,9 @@ func TestExpandFeatures(t *testing.T) {
 				ResourceGroup: features.ResourceGroupFeatures{
 					PreventDeletionIfContainsResources: false,
 				},
+				Subscription: features.SubscriptionFeatures{
+					PreventCancellationOnDestroy: false,
+				},
 				TemplateDeployment: features.TemplateDeploymentFeatures{
 					DeleteNestedItemsDuringDeletion: false,
 				},
@@ -1196,3 +1215,51 @@ func TestExpandFeaturesManagedDisk(t *testing.T) {
 		}
 	}
 }
+
+func TestExpandFeaturesSubscription(t *testing.T) {
+	testData := []struct {
+		Name     string
+		Input    []interface{}
+		EnvVars  map[string]interface{}
+		Expected features.UserFeatures
+	}{
+		{
+			Name: "Empty Block",
+			Input: []interface{}{
+				map[string]interface{}{
+					"subscription": []interface{}{},
+				},
+			},
+			Expected: features.UserFeatures{
+				Subscription: features.SubscriptionFeatures{
+					PreventCancellationOnDestroy: false,
+				},
+			},
+		},
+		{
+			Name: "No Downtime Resize Enabled",
+			Input: []interface{}{
+				map[string]interface{}{
+					"subscription": []interface{}{
+						map[string]interface{}{
+							"prevent_cancellation_on_destroy": true,
+						},
+					},
+				},
+			},
+			Expected: features.UserFeatures{
+				Subscription: features.SubscriptionFeatures{
+					PreventCancellationOnDestroy: true,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testData {
+		t.Logf("[DEBUG] Test Case: %q", testCase.Name)
+		result := expandFeatures(testCase.Input)
+		if !reflect.DeepEqual(result.Subscription, testCase.Expected.Subscription) {
+			t.Fatalf("Expected %+v but got %+v", result.Subscription, testCase.Expected.Subscription)
+		}
+	}
+}

internal/services/subscription/subscription_resource.go

@@ -408,15 +408,18 @@ func resourceSubscriptionDelete(d *pluginsdk.ResourceData, meta interface{}) err
 	}
 
 	// Cancel the Subscription
-	if _, err := subscriptionClient.Cancel(ctx, subscriptionId); err != nil {
-		return fmt.Errorf("failed to cancel Subscription: %+v", err)
-	}
+	if !meta.(*clients.Client).Features.Subscription.PreventCancellationOnDestroy {
+		log.Printf("[DEBUG] Cancelling subscription %s", subscriptionId)
+
+		if _, err := subscriptionClient.Cancel(ctx, subscriptionId); err != nil {
+			return fmt.Errorf("failed to cancel Subscription: %+v", err)
+		}
 
-	deadline, _ := ctx.Deadline()
-	deleteDeadline := time.Until(deadline)
 
 	if err := waitForSubscriptionStateToSettle(ctx, meta.(*clients.Client), subscriptionId, "Cancelled", deleteDeadline); err != nil {
 		return fmt.Errorf("failed to cancel Subscription %q (Alias %q): %+v", subscriptionId, id.AliasName, err)
+	} else {
+		log.Printf("[DEBUG] Skipping subscription %s cancellation due to feature flag.", *id)
 	}
 
 	return nil

website/docs/guides/features-block.html.markdown

@@ -62,6 +62,10 @@ provider "azurerm" {
       prevent_deletion_if_contains_resources = true
     }
 
+    subscription {
+      prevent_cancellation_on_destroy = false
+    }
+
     template_deployment {
       delete_nested_items_during_deletion = true
     }
@@ -185,6 +189,12 @@ The `resource_group` block supports the following:
 
 ---
 
+The `subscription` block supports the following:
+
+* `prevent_cancellation_on_destroy` - (Optional) Should the `azurerm_subscription` resource prevent a subscription to be cancelled on destroy? Defaults to `false`.
+
+---
+
 The `template_deployment` block supports the following:
 
 * `delete_nested_items_during_deletion` - (Optional) Should the `azurerm_resource_group_template_deployment` resource attempt to delete resources that have been provisioned by the ARM Template, when the Resource Group Template Deployment is deleted? Defaults to `true`.

website/docs/r/subscription.html.markdown

@@ -14,6 +14,8 @@ Manages an Alias for a Subscription - which adds an Alias to an existing Subscri
 
 ~> **NOTE:** It is not possible to destroy (cancel) a subscription if it contains resources. If resources are present that are not managed by Terraform then these will need to be removed before the Subscription can be destroyed.
 
+~> **Note:** This resource will automatically attempt to cancel a subscription when it is deleted. This behavior can be disabled in the provider `features` block by setting the `prevent_cancellation_on_destroy` field to `true` within the `subscription` block.
+
 ~> **NOTE:** Azure supports Multiple Aliases per Subscription, however, to reliably manage this resource in Terraform only a single Alias is supported.
 
 ~> **NOTE:** When using this resource across tenants the `client_id` and `tenant_id` of the `provider` config block should be for the home tenant details for the SPN / User or a permissions error will likely be encountered. See [the official documentation](https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/programmatically-create-subscription) for more details.