New Data Source: azurerm_route_table (#1203)

* New Data Source: `azurerm_route_table`

Fixes #1155

* Fixing issues identified during code review

azurerm/data_source_route_table.go

@@ -0,0 +1,138 @@
+package azurerm
+
+import (
+	"fmt"
+
+	"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2017-09-01/network"
+	"github.com/hashicorp/terraform/helper/schema"
+	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/utils"
+)
+
+func dataSourceArmRouteTable() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceArmRouteTableRead,
+
+		Schema: map[string]*schema.Schema{
+			"name": {
+				Type:     schema.TypeString,
+				Required: true,
+			},
+
+			"resource_group_name": resourceGroupNameForDataSourceSchema(),
+
+			"location": locationForDataSourceSchema(),
+
+			"route": {
+				Type:     schema.TypeList,
+				Computed: true,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"name": {
+							Type:     schema.TypeString,
+							Computed: true,
+						},
+
+						"address_prefix": {
+							Type:     schema.TypeString,
+							Computed: true,
+						},
+
+						"next_hop_type": {
+							Type:     schema.TypeString,
+							Computed: true,
+						},
+
+						"next_hop_in_ip_address": {
+							Type:     schema.TypeString,
+							Computed: true,
+						},
+					},
+				},
+			},
+
+			"subnets": {
+				Type:     schema.TypeSet,
+				Computed: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+				Set:      schema.HashString,
+			},
+
+			"tags": tagsForDataSourceSchema(),
+		},
+	}
+}
+
+func dataSourceArmRouteTableRead(d *schema.ResourceData, meta interface{}) error {
+	client := meta.(*ArmClient).routeTablesClient
+	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 Azure Route Table %q: %+v", name, err)
+	}
+
+	d.SetId(*resp.ID)
+
+	d.Set("name", name)
+	d.Set("resource_group_name", resourceGroup)
+	if location := resp.Location; location != nil {
+		d.Set("location", azureRMNormalizeLocation(*location))
+	}
+
+	if props := resp.RouteTablePropertiesFormat; props != nil {
+		if err := d.Set("route", flattenRouteTableDataSourceRoutes(props.Routes)); err != nil {
+			return err
+		}
+
+		if err := d.Set("subnets", flattenRouteTableDataSourceSubnets(props.Subnets)); err != nil {
+			return err
+		}
+	}
+
+	flattenAndSetTags(d, resp.Tags)
+
+	return nil
+}
+
+func flattenRouteTableDataSourceRoutes(input *[]network.Route) []interface{} {
+	results := make([]interface{}, 0)
+
+	if routes := input; routes != nil {
+		for _, route := range *routes {
+			r := make(map[string]interface{})
+
+			r["name"] = *route.Name
+
+			if props := route.RoutePropertiesFormat; props != nil {
+				r["address_prefix"] = *props.AddressPrefix
+				r["next_hop_type"] = string(props.NextHopType)
+				if ip := props.NextHopIPAddress; ip != nil {
+					r["next_hop_in_ip_address"] = *ip
+				}
+			}
+
+			results = append(results, r)
+		}
+	}
+
+	return results
+}
+
+func flattenRouteTableDataSourceSubnets(input *[]network.Subnet) []string {
+	output := make([]string, 0)
+
+	if subnets := input; subnets != nil {
+		for _, subnet := range *subnets {
+			output = append(output, *subnet.ID)
+		}
+	}
+
+	return output
+}

azurerm/data_source_route_table_test.go

@@ -0,0 +1,120 @@
+package azurerm
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform/helper/acctest"
+	"github.com/hashicorp/terraform/helper/resource"
+)
+
+func TestAccDataSourceAzureRMRouteTable_basic(t *testing.T) {
+	dataSourceName := "data.azurerm_route_table.test"
+	ri := acctest.RandInt()
+	location := testLocation()
+	config := testAccDataSourceAzureRMRouteTable_basic(ri, location)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMRouteTableDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMRouteTableExists(dataSourceName),
+					resource.TestCheckResourceAttr(dataSourceName, "route.#", "0"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDataSourceAzureRMRouteTable_singleRoute(t *testing.T) {
+	dataSourceName := "data.azurerm_route_table.test"
+	ri := acctest.RandInt()
+	location := testLocation()
+	config := testAccDataSourceAzureRMRouteTable_singleRoute(ri, location)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMRouteTableDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMRouteTableExists(dataSourceName),
+					resource.TestCheckResourceAttr(dataSourceName, "route.#", "1"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.name", "route1"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.address_prefix", "10.1.0.0/16"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.next_hop_type", "VnetLocal"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDataSourceAzureRMRouteTable_multipleRoutes(t *testing.T) {
+	dataSourceName := "data.azurerm_route_table.test"
+	ri := acctest.RandInt()
+	location := testLocation()
+	config := testAccDataSourceAzureRMRouteTable_multipleRoutes(ri, location)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMRouteTableDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMRouteTableExists(dataSourceName),
+					resource.TestCheckResourceAttr(dataSourceName, "route.#", "2"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.name", "route1"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.address_prefix", "10.1.0.0/16"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.0.next_hop_type", "VnetLocal"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.1.name", "route2"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.1.address_prefix", "10.2.0.0/16"),
+					resource.TestCheckResourceAttr(dataSourceName, "route.1.next_hop_type", "VnetLocal"),
+				),
+			},
+		},
+	})
+}
+
+func testAccDataSourceAzureRMRouteTable_basic(rInt int, location string) string {
+	resource := testAccAzureRMRouteTable_basic(rInt, location)
+	return fmt.Sprintf(`
+%s
+
+data "azurerm_route_table" "test" {
+  name                = "${azurerm_route_table.test.name}"
+  resource_group_name = "${azurerm_route_table.test.resource_group_name}"
+}
+`, resource)
+}
+
+func testAccDataSourceAzureRMRouteTable_singleRoute(rInt int, location string) string {
+	resource := testAccAzureRMRouteTable_singleRoute(rInt, location)
+	return fmt.Sprintf(`
+%s
+
+data "azurerm_route_table" "test" {
+  name                = "${azurerm_route_table.test.name}"
+  resource_group_name = "${azurerm_route_table.test.resource_group_name}"
+}
+`, resource)
+}
+
+func testAccDataSourceAzureRMRouteTable_multipleRoutes(rInt int, location string) string {
+	resource := testAccAzureRMRouteTable_multipleRoutes(rInt, location)
+	return fmt.Sprintf(`
+%s
+
+data "azurerm_route_table" "test" {
+  name                = "${azurerm_route_table.test.name}"
+  resource_group_name = "${azurerm_route_table.test.resource_group_name}"
+}
+`, resource)
+}

azurerm/provider.go

@@ -97,6 +97,7 @@ func Provider() terraform.ResourceProvider {
 			"azurerm_recovery_services_vault":               dataSourceArmRecoveryServicesVault(),
 			"azurerm_resource_group":                        dataSourceArmResourceGroup(),
 			"azurerm_role_definition":                       dataSourceArmRoleDefinition(),
+			"azurerm_route_table":                           dataSourceArmRouteTable(),
 			"azurerm_scheduler_job_collection":              dataSourceArmSchedulerJobCollection(),
 			"azurerm_snapshot":                              dataSourceArmSnapshot(),
 			"azurerm_storage_account":                       dataSourceArmStorageAccount(),

website/azurerm.erb

@@ -104,10 +104,14 @@
                     <a href="/docs/providers/azurerm/d/resource_group.html">azurerm_resource_group</a>
                 </li>
 
-                <li<%= sidebar_current("docs-azurerm-datasource-role_definition") %>>
+                <li<%= sidebar_current("docs-azurerm-datasource-role-definition") %>>
                     <a href="/docs/providers/azurerm/d/role_definition.html">azurerm_role_definition</a>
                 </li>
 
+                <li<%= sidebar_current("docs-azurerm-data-source-route-table") %>>
+                    <a href="/docs/providers/azurerm/d/route_table.html">azurerm_route_table</a>
+                </li>
+
                 <li<%= sidebar_current("docs-azurerm-datasource-scheduler-job-collection") %>>
                     <a href="/docs/providers/azurerm/d/scheduler_job_collection.html">azurerm_scheduler_job_collection</a>
                 </li>

website/docs/d/route_table.html.markdown

@@ -0,0 +1,54 @@
+---
+layout: "azurerm"
+page_title: "Azure Resource Manager: azurerm_route_table"
+sidebar_current: "docs-azurerm-data-source-route-table"
+description: |-
+  Gets information about a Route Table
+
+---
+
+# Data Source: azurerm_route_table
+
+Gets information about a Route Table
+
+## Example Usage
+
+```hcl
+data "azurerm_route_table" "test" {
+  name                = "myroutetable"
+  resource_group_name = "some-resource-group"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `name` - (Required) The name of the Route Table.
+
+* `resource_group_name` - (Required) The name of the Resource Group in which the Route Table exists.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `id` - The Route Table ID.
+
+* `location` - The Azure Region in which the Route Table exists.
+
+* `route` - One or more `route` blocks as documented below.
+
+* `subnets` - The collection of Subnets associated with this route table.
+
+* `tags` - A mapping of tags assigned to the Route Table.
+
+The `route` block exports the following:
+
+* `name` - The name of the Route.
+
+* `address_prefix` - The destination CIDR to which the route applies.
+
+* `next_hop_type` - The type of Azure hop the packet should be sent to.
+
+* `next_hop_in_ip_address` - Contains the IP address packets should be forwarded to.
+