Add support for capacity aware modes to `google_compute_region_instance_group_manager

.changelog/4348.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: added `distribution_policy_target_shape` field to `google_compute_region_instance_group_manager` resource
+```

google/resource_compute_region_instance_group_manager.go

@@ -213,6 +213,14 @@ func resourceComputeRegionInstanceGroupManager() *schema.Resource {
 				},
 			},
 
+			"distribution_policy_target_shape": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				ForceNew:    true,
+				Computed:    true,
+				Description: `The shape to which the group converges either proactively or on resize events (depending on the value set in updatePolicy.instanceRedistributionType).`,
+			},
+
 			"update_policy": {
 				Type:        schema.TypeList,
 				Computed:    true,
@@ -345,7 +353,7 @@ func resourceComputeRegionInstanceGroupManagerCreate(d *schema.ResourceData, met
 		AutoHealingPolicies: expandAutoHealingPolicies(d.Get("auto_healing_policies").([]interface{})),
 		Versions:            expandVersions(d.Get("version").([]interface{})),
 		UpdatePolicy:        expandRegionUpdatePolicy(d.Get("update_policy").([]interface{})),
-		DistributionPolicy:  expandDistributionPolicy(d.Get("distribution_policy_zones").(*schema.Set)),
+		DistributionPolicy:  expandDistributionPolicy(d),
 		StatefulPolicy:      expandStatefulPolicy(d.Get("stateful_disk").(*schema.Set).List()),
 		// Force send TargetSize to allow size of 0.
 		ForceSendFields: []string{"TargetSize"},
@@ -466,6 +474,9 @@ func resourceComputeRegionInstanceGroupManagerRead(d *schema.ResourceData, meta
 	if err := d.Set("distribution_policy_zones", flattenDistributionPolicy(manager.DistributionPolicy)); err != nil {
 		return err
 	}
+	if err := d.Set("distribution_policy_target_shape", manager.DistributionPolicy.TargetShape); err != nil {
+		return err
+	}
 	if err := d.Set("self_link", ConvertSelfLinkToV1(manager.SelfLink)); err != nil {
 		return fmt.Errorf("Error setting self_link: %s", err)
 	}
@@ -716,21 +727,24 @@ func flattenRegionUpdatePolicy(updatePolicy *computeBeta.InstanceGroupManagerUpd
 	return results
 }
 
-func expandDistributionPolicy(configured *schema.Set) *computeBeta.DistributionPolicy {
-	if configured.Len() == 0 {
+func expandDistributionPolicy(d *schema.ResourceData) *computeBeta.DistributionPolicy {
+	dpz := d.Get("distribution_policy_zones").(*schema.Set)
+	dpts := d.Get("distribution_policy_target_shape").(string)
+	if dpz.Len() == 0 && dpts == "" {
 		return nil
 	}
 
-	distributionPolicyZoneConfigs := make([]*computeBeta.DistributionPolicyZoneConfiguration, 0, configured.Len())
-	for _, raw := range configured.List() {
+	distributionPolicyZoneConfigs := make([]*computeBeta.DistributionPolicyZoneConfiguration, 0, dpz.Len())
+	for _, raw := range dpz.List() {
 		data := raw.(string)
 		distributionPolicyZoneConfig := computeBeta.DistributionPolicyZoneConfiguration{
 			Zone: "zones/" + data,
 		}
 
 		distributionPolicyZoneConfigs = append(distributionPolicyZoneConfigs, &distributionPolicyZoneConfig)
 	}
-	return &computeBeta.DistributionPolicy{Zones: distributionPolicyZoneConfigs}
+
+	return &computeBeta.DistributionPolicy{Zones: distributionPolicyZoneConfigs, TargetShape: dpts}
 }
 
 func flattenDistributionPolicy(distributionPolicy *computeBeta.DistributionPolicy) []string {

google/resource_compute_region_instance_group_manager_test.go

@@ -1057,10 +1057,11 @@ resource "google_compute_region_instance_group_manager" "igm-basic" {
     name              = "primary"
   }
 
-  base_instance_name        = "igm-basic"
-  region                    = "us-central1"
-  target_size               = 2
-  distribution_policy_zones = ["%s"]
+  base_instance_name               = "igm-basic"
+  region                           = "us-central1"
+  target_size                      = 2
+  distribution_policy_zones        = ["%s"]
+  distribution_policy_target_shape = "ANY"
 }
 `, template, igm, strings.Join(zones, "\",\""))
 }

website/docs/r/compute_region_instance_group_manager.html.markdown

@@ -11,10 +11,15 @@ description: |-
 
 The Google Compute Engine Regional Instance Group Manager API creates and manages pools
 of homogeneous Compute Engine virtual machine instances from a common instance
-template. For more information, see [the official documentation](https://cloud.google.com/compute/docs/instance-groups/distributing-instances-with-regional-instance-groups)
-and [API](https://cloud.google.com/compute/docs/reference/latest/regionInstanceGroupManagers)
+template.
 
-~> **Note:** Use [google_compute_instance_group_manager](/docs/providers/google/r/compute_instance_group_manager.html) to create a single-zone instance group manager.
+To get more information about regionInstanceGroupManagers, see:
+
+* [API documentation](https://cloud.google.com/compute/docs/reference/latest/regionInstanceGroupManagers)
+* How-to Guides
+    * [Regional Instance Groups Guide](https://cloud.google.com/compute/docs/instance-groups/distributing-instances-with-regional-instance-groups)
+
+~> **Note:** Use [google_compute_instance_group_manager](/docs/providers/google/r/compute_instance_group_manager.html) to create a zonal instance group manager.
 
 ## Example Usage with top level instance template (`google` provider)
 
@@ -138,6 +143,8 @@ group. You can specify only one value. Structure is documented below. For more i
 * `distribution_policy_zones` - (Optional) The distribution policy for this managed instance
 group. You can specify one or more values. For more information, see the [official documentation](https://cloud.google.com/compute/docs/instance-groups/distributing-instances-with-regional-instance-groups#selectingzones).
 
+* `distribution_policy_target_shape` - (Optional) The shape to which the group converges either proactively or on resize events (depending on the value set in update_policy.0.instance_redistribution_type). For more information see the [official documentation](https://cloud.google.com/compute/docs/instance-groups/regional-mig-distribution-shape).
+
 * `stateful_disk` - (Optional) Disks created on the instances that will be preserved on instance delete, update, etc. Structure is documented below. For more information see the [official documentation](https://cloud.google.com/compute/docs/instance-groups/configuring-stateful-disks-in-migs). Proactive cross zone instance redistribution must be disabled before you can update stateful disks on existing instance group managers. This can be controlled via the `update_policy`.
 
 - - -