Add Global forwarding rule datasource

.changelog/4052.txt

@@ -0,0 +1,3 @@
+```release-note:new-datasource
+compute: added `google_compute_global_forwarding_rule` datasource
+```

google-beta/data_source_google_global_compute_forwarding_rule.go

@@ -0,0 +1,37 @@
+package google
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func dataSourceGoogleComputeGlobalForwardingRule() *schema.Resource {
+	dsSchema := datasourceSchemaFromResourceSchema(resourceComputeGlobalForwardingRule().Schema)
+
+	// Set 'Required' schema elements
+	addRequiredFieldsToSchema(dsSchema, "name")
+
+	// Set 'Optional' schema elements
+	addOptionalFieldsToSchema(dsSchema, "project")
+
+	return &schema.Resource{
+		Read:   dataSourceGoogleComputeGlobalForwardingRuleRead,
+		Schema: dsSchema,
+	}
+}
+
+func dataSourceGoogleComputeGlobalForwardingRuleRead(d *schema.ResourceData, meta interface{}) error {
+	config := meta.(*Config)
+
+	name := d.Get("name").(string)
+
+	project, err := getProject(d, config)
+	if err != nil {
+		return err
+	}
+
+	d.SetId(fmt.Sprintf("projects/%s/global/forwardingRules/%s", project, name))
+
+	return resourceComputeGlobalForwardingRuleRead(d, meta)
+}

google-beta/data_source_google_global_compute_forwarding_rule_test.go

@@ -0,0 +1,55 @@
+package google
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccDataSourceGoogleGlobalForwardingRule(t *testing.T) {
+	t.Parallel()
+
+	poolName := fmt.Sprintf("tf-%s", randString(t, 10))
+	ruleName := fmt.Sprintf("tf-%s", randString(t, 10))
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourceGoogleGlobalForwardingRuleConfig(poolName, ruleName),
+				Check:  checkDataSourceStateMatchesResourceState("data.google_compute_global_forwarding_rule.my_forwarding_rule", "google_compute_global_forwarding_rule.foobar-fr"),
+			},
+		},
+	})
+}
+
+func testAccDataSourceGoogleGlobalForwardingRuleConfig(poolName, ruleName string) string {
+	return fmt.Sprintf(`
+resource "google_compute_global_forwarding_rule" "foobar-fr" {
+  name       = "%s"
+  target     = google_compute_target_http_proxy.default.id
+  port_range = "80"
+}
+
+resource "google_compute_target_http_proxy" "default" {
+  name        = "%s"
+  description = "a description"
+  url_map     = google_compute_url_map.default.id
+}
+
+resource "google_compute_url_map" "default" {
+  name            = "%s"
+  default_url_redirect {
+	https_redirect         = true
+	redirect_response_code = "MOVED_PERMANENTLY_DEFAULT"
+	strip_query            = false
+  }
+}
+
+data "google_compute_global_forwarding_rule" "my_forwarding_rule" {
+  name = google_compute_global_forwarding_rule.foobar-fr.name
+}
+`, ruleName, poolName, poolName)
+}

google-beta/provider.go

@@ -662,6 +662,7 @@ func Provider() *schema.Provider {
 			"google_compute_default_service_account":              dataSourceGoogleComputeDefaultServiceAccount(),
 			"google_compute_forwarding_rule":                      dataSourceGoogleComputeForwardingRule(),
 			"google_compute_global_address":                       dataSourceGoogleComputeGlobalAddress(),
+			"google_compute_global_forwarding_rule":               dataSourceGoogleComputeGlobalForwardingRule(),
 			"google_compute_image":                                dataSourceGoogleComputeImage(),
 			"google_compute_instance":                             dataSourceGoogleComputeInstance(),
 			"google_compute_instance_serial_port":                 dataSourceGoogleComputeInstanceSerialPort(),

website/docs/d/compute_global_forwarding_rule.html.markdown

@@ -0,0 +1,34 @@
+---
+subcategory: "Compute Engine"
+layout: "google"
+page_title: "Google: google_compute_global_forwarding_rule"
+sidebar_current: "docs-google-datasource-compute-global_forwarding-rule"
+description: |-
+  Get a global forwarding rule within GCE.
+---
+
+# google\_compute\_global_\forwarding\_rule
+
+Get a global forwarding rule within GCE from its name.
+
+## Example Usage
+
+```tf
+data "google_compute_global_forwarding_rule" "my-forwarding-rule" {
+  name = "forwarding-rule-global"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `name` - (Required) The name of the global forwarding rule.
+
+- - -
+
+* `project` - (Optional) The project in which the resource belongs. If it
+    is not provided, the provider project is used.
+
+## Attributes Reference
+See [google_compute_global_forwarding_rule](https://www.terraform.io/docs/providers/google/r/compute_global_forwarding_rule.html) resource for details of the available attributes.

website/google.erb

@@ -1330,6 +1330,10 @@
           <a href="/docs/providers/google/d/compute_global_address.html">google_compute_global_address</a>
           </li>
 
+          <li>
+          <a href="/docs/providers/google/d/compute_global_forwarding_rule.html">google_compute_global_forwarding_rule</a>
+          </li>
+
           <li>
           <a href="/docs/providers/google/d/compute_image.html">google_compute_image</a>
           </li>