User Assigned Identity: add corresponding data source

azurerm/data_source_user_assigned_identity.go

@@ -0,0 +1,73 @@
+package azurerm
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform/helper/schema"
+	"github.com/hashicorp/terraform/helper/validation"
+	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/utils"
+)
+
+func dataSourceArmUserAssignedIdentity() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceArmUserAssignedIdentityRead,
+		Schema: map[string]*schema.Schema{
+			"name": {
+				Type:         schema.TypeString,
+				Required:     true,
+				ValidateFunc: validation.StringLenBetween(1, 24),
+			},
+
+			"resource_group_name": resourceGroupNameForDataSourceSchema(),
+
+			"location": locationForDataSourceSchema(),
+
+			"principal_id": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
+			"client_id": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
+			"tags": tagsForDataSourceSchema(),
+		},
+	}
+}
+
+func dataSourceArmUserAssignedIdentityRead(d *schema.ResourceData, meta interface{}) error {
+	client := meta.(*ArmClient).userAssignedIdentitiesClient
+	ctx := meta.(*ArmClient).StopContext
+
+	name := d.Get("name").(string)
+	resourceGroup := d.Get("resource_group_name").(string)
+
+	resp, err := client.Get(ctx, resourceGroup, name)
+	if err != nil {
+		if utils.ResponseWasNotFound(resp.Response) {
+			d.SetId("")
+			return nil
+		}
+		return fmt.Errorf("Error making Read request on User Assigned Identity %q (Resource Group %q): %+v", name, resourceGroup, err)
+	}
+
+	d.SetId(*resp.ID)
+
+	d.Set("location", resp.Location)
+
+	if props := resp.IdentityProperties; props != nil {
+		if principalId := props.PrincipalID; principalId != nil {
+			d.Set("principal_id", principalId.String())
+		}
+
+		if clientId := props.ClientID; clientId != nil {
+			d.Set("client_id", clientId.String())
+		}
+	}
+
+	flattenAndSetTags(d, resp.Tags)
+
+	return nil
+}

azurerm/data_source_user_assigned_identity_test.go

@@ -0,0 +1,89 @@
+package azurerm
+
+import (
+	"fmt"
+	"regexp"
+	"testing"
+
+	"github.com/hashicorp/terraform/helper/acctest"
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
+)
+
+func TestAccDataSourceAzureRMUserAssignedIdentity_basic(t *testing.T) {
+	generatedUuidRegex := "^[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}$"
+	dataSourceName := "data.azurerm_user_assigned_identity.test"
+	resourceName := "azurerm_user_assigned_identity.test"
+	ri := tf.AccRandTimeInt()
+	rs := acctest.RandString(4)
+
+	location := testLocation()
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceAzureRMUserAssignedIdentity_basic(ri, testLocation(), rs),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(dataSourceName, "name", fmt.Sprintf("acctest%s-uai", rs)),
+					resource.TestCheckResourceAttr(dataSourceName, "resource_group_name", fmt.Sprintf("acctest%d-rg", ri)),
+					resource.TestCheckResourceAttr(dataSourceName, "location", azureRMNormalizeLocation(location)),
+					resource.TestMatchResourceAttr(dataSourceName, "principal_id", regexp.MustCompile(generatedUuidRegex)),
+					resource.TestMatchResourceAttr(dataSourceName, "client_id", regexp.MustCompile(generatedUuidRegex)),
+					resource.TestCheckResourceAttr(dataSourceName, "tags.%", "1"),
+					testEqualResourceAttr(dataSourceName, resourceName, "principal_id"),
+					testEqualResourceAttr(dataSourceName, resourceName, "client_id"),
+				),
+			},
+		},
+	})
+}
+
+func testEqualResourceAttr(dataSourceName string, resourceName string, attrName string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		// Ensure we have enough information in state to look up in API
+		ds, ok := s.RootModule().Resources[dataSourceName]
+		if !ok {
+			return fmt.Errorf("Not found: %s", dataSourceName)
+		}
+
+		rs, ok := s.RootModule().Resources[resourceName]
+		if !ok {
+			return fmt.Errorf("Not found: %s", resourceName)
+		}
+
+		dsAttr := ds.Primary.Attributes[attrName]
+		rsAttr := rs.Primary.Attributes[attrName]
+
+		if dsAttr != rsAttr {
+			return fmt.Errorf("Attributes not equal: %s, %s", dsAttr, rsAttr)
+		}
+
+		return nil
+	}
+}
+
+func testAccDataSourceAzureRMUserAssignedIdentity_basic(rInt int, location string, rString string) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+	name = "acctest%d-rg"
+	location = "%s"
+}
+
+resource "azurerm_user_assigned_identity" "test" {
+	name = "acctest%s-uai"
+	resource_group_name = "${azurerm_resource_group.test.name}"
+	location = "${azurerm_resource_group.test.location}"
+	tags = {
+		"foo" = "bar"
+	}
+}
+
+data "azurerm_user_assigned_identity" "test" {
+	name = "${azurerm_user_assigned_identity.test.name}"
+	resource_group_name = "${azurerm_resource_group.test.name}"
+}
+`, rInt, location, rString)
+}

azurerm/provider.go

@@ -167,6 +167,7 @@ func Provider() terraform.ResourceProvider {
 			"azurerm_subscription":                           dataSourceArmSubscription(),
 			"azurerm_subscriptions":                          dataSourceArmSubscriptions(),
 			"azurerm_traffic_manager_geographical_location":  dataSourceArmTrafficManagerGeographicalLocation(),
+			"azurerm_user_assigned_identity":                 dataSourceArmUserAssignedIdentity(),
 			"azurerm_virtual_machine":                        dataSourceArmVirtualMachine(),
 			"azurerm_virtual_network_gateway":                dataSourceArmVirtualNetworkGateway(),
 			"azurerm_virtual_network":                        dataSourceArmVirtualNetwork(),

website/azurerm.erb

@@ -327,6 +327,10 @@
                     <a href="/docs/providers/azurerm/d/traffic_manager_geographical_location.html">azurerm_traffic_manager_geographical_location</a>
                 </li>
 
+                <li<%= sidebar_current("docs-azurerm-datasource-user-assigned-identity") %>>
+                    <a href="/docs/providers/azurerm/d/user_assigned_identity.html">azurerm_user_assigned_identity</a>
+                </li>
+
                 <li<%= sidebar_current("docs-azurerm-datasource-virtual-machine") %>>
                     <a href="/docs/providers/azurerm/d/virtual_machine.html">azurerm_virtual_machine</a>
                 </li>

website/docs/d/user_assigned_identity.html.markdown

@@ -0,0 +1,42 @@
+---
+layout: "azurerm"
+page_title: "Azure Resource Manager: azure_user_assigned_identity"
+sidebar_current: "docs-azurerm-datasource-user-assigned-identity"
+description: |-
+  Gets information about an existing User Assigned Identity.
+
+---
+
+# Data Source: azurerm_user_assigned_identity
+
+Use this data source to access information about an existing User Assigned Identity.
+
+## Example Usage (reference an existing)
+
+```hcl
+data "azurerm_user_assigned_identity" "test" {
+  name                = "name_of_user_assigned_identity"
+  resource_group_name = "name_of_resource_group"
+}
+
+output "uai_client_id" {
+  value = "${data.azurerm_user_assigned_identity.test.client_id}"
+}
+
+output "uai_principal_id" {
+  value = "${data.azurerm_user_assigned_identity.test.principal_id}"
+}
+```
+
+## Argument Reference
+
+* `name` - (Required) Specifies the name of the user assigned identity.
+* `resource_group_name` - (Required) Specifies the name of the resource group.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `id` - The user assigned identity ID.
+* `principal_id` - Service Principal ID associated with the user assigned identity.
+* `client_id` - Client ID associated with the user assigned identity.