Add support for session_affinity to google_compute_region_backend_service

Author: Christoph Blecker

builtin/providers/google/resource_compute_region_backend_service.go

@@ -82,6 +82,12 @@ func resourceComputeRegionBackendService() *schema.Resource {
 				Computed: true,
 			},
 
+			"session_affinity": &schema.Schema{
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+
 			"region": &schema.Schema{
 				Type:     schema.TypeString,
 				Optional: true,
@@ -129,6 +135,10 @@ func resourceComputeRegionBackendServiceCreate(d *schema.ResourceData, meta inte
 		service.Protocol = v.(string)
 	}
 
+	if v, ok := d.GetOk("session_affinity"); ok {
+		service.SessionAffinity = v.(string)
+	}
+
 	if v, ok := d.GetOk("timeout_sec"); ok {
 		service.TimeoutSec = int64(v.(int))
 	}
@@ -192,6 +202,7 @@ func resourceComputeRegionBackendServiceRead(d *schema.ResourceData, meta interf
 
 	d.Set("description", service.Description)
 	d.Set("protocol", service.Protocol)
+	d.Set("session_affinity", service.SessionAffinity)
 	d.Set("timeout_sec", service.TimeoutSec)
 	d.Set("fingerprint", service.Fingerprint)
 	d.Set("self_link", service.SelfLink)
@@ -238,6 +249,9 @@ func resourceComputeRegionBackendServiceUpdate(d *schema.ResourceData, meta inte
 	if v, ok := d.GetOk("protocol"); ok {
 		service.Protocol = v.(string)
 	}
+	if v, ok := d.GetOk("session_affinity"); ok {
+		service.SessionAffinity = v.(string)
+	}
 	if v, ok := d.GetOk("timeout_sec"); ok {
 		service.TimeoutSec = int64(v.(int))
 	}

builtin/providers/google/resource_compute_region_backend_service_test.go

@@ -114,6 +114,32 @@ func TestAccComputeRegionBackendService_withBackendAndUpdate(t *testing.T) {
 	}
 }
 
+func TestAccComputeRegionBackendService_withSessionAffinity(t *testing.T) {
+	serviceName := fmt.Sprintf("tf-test-%s", acctest.RandString(10))
+	checkName := fmt.Sprintf("tf-test-%s", acctest.RandString(10))
+	var svc compute.BackendService
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeRegionBackendServiceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccComputeRegionBackendService_withSessionAffinity(
+					serviceName, checkName),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeRegionBackendServiceExists(
+						"google_compute_region_backend_service.foobar", &svc),
+				),
+			},
+		},
+	})
+
+	if svc.SessionAffinity != "CLIENT_IP" {
+		t.Errorf("Expected Protocol to be CLIENT_IP, got %q", svc.SessionAffinity)
+	}
+}
+
 func testAccCheckComputeRegionBackendServiceDestroy(s *terraform.State) error {
 	config := testAccProvider.Meta().(*Config)
 
@@ -253,10 +279,32 @@ resource "google_compute_health_check" "default" {
   name               = "%s"
   check_interval_sec = 1
   timeout_sec        = 1
- 
+
   tcp_health_check {
 
   }
 }
 `, serviceName, timeout, igName, itName, checkName)
 }
+
+func testAccComputeRegionBackendService_withSessionAffinity(serviceName, checkName string) string {
+	return fmt.Sprintf(`
+resource "google_compute_region_backend_service" "foobar" {
+  name                  = "%s"
+  health_checks         = ["${google_compute_health_check.zero.self_link}"]
+  region                = "us-central1"
+  session_affinity      = "CLIENT_IP"
+
+}
+
+resource "google_compute_health_check" "zero" {
+  name               = "%s"
+  check_interval_sec = 1
+  timeout_sec        = 1
+
+  tcp_health_check {
+    port = "80"
+  }
+}
+`, serviceName, checkName)
+}

website/source/docs/providers/google/r/compute_region_backend_service.html.markdown

@@ -20,6 +20,7 @@ resource "google_compute_region_backend_service" "foobar" {
   description           = "Hello World 1234"
   protocol              = "TCP"
   timeout_sec           = 10
+  session_affinity      = "CLIENT_IP"
 
   backend {
     group = "${google_compute_instance_group_manager.foo.instance_group}"
@@ -84,6 +85,10 @@ The following arguments are supported:
 * `protocol` - (Optional) The protocol for incoming requests. Defaults to
     `HTTP`.
 
+* `session_affinity` - (Optional) How to distribute load. Options are `NONE` (no
+    affinity), `CLIENT_IP`, `CLIENT_IP_PROTO`, or `CLIENT_IP_PORT_PROTO`.
+    Defaults to `NONE`.
+
 * `region` - (Optional) The Region in which the created address should reside.
     If it is not provided, the provider region is used.