Add Provisioned IOPS support

.changelog/4578.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: added `provisioned_iops` to `google_compute_disk`
+```

google/resource_compute_disk.go

@@ -362,6 +362,12 @@ are 4096 and 16384, other sizes may be added in the future.
 If an unsupported value is requested, the error message will list
 the supported values for the caller's project.`,
 			},
+			"provisioned_iops": {
+				Type:        schema.TypeInt,
+				Optional:    true,
+				ForceNew:    true,
+				Description: `Indicates how many IOPS must be provisioned for the disk.`,
+			},
 			"size": {
 				Type:     schema.TypeInt,
 				Computed: true,
@@ -620,6 +626,12 @@ func resourceComputeDiskCreate(d *schema.ResourceData, meta interface{}) error {
 	} else if v, ok := d.GetOkExists("image"); !isEmptyValue(reflect.ValueOf(sourceImageProp)) && (ok || !reflect.DeepEqual(v, sourceImageProp)) {
 		obj["sourceImage"] = sourceImageProp
 	}
+	provisionedIopsProp, err := expandComputeDiskProvisionedIops(d.Get("provisioned_iops"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("provisioned_iops"); !isEmptyValue(reflect.ValueOf(provisionedIopsProp)) && (ok || !reflect.DeepEqual(v, provisionedIopsProp)) {
+		obj["provisionedIops"] = provisionedIopsProp
+	}
 	zoneProp, err := expandComputeDiskZone(d.Get("zone"), d, config)
 	if err != nil {
 		return err
@@ -784,6 +796,9 @@ func resourceComputeDiskRead(d *schema.ResourceData, meta interface{}) error {
 	if err := d.Set("image", flattenComputeDiskImage(res["sourceImage"], d, config)); err != nil {
 		return fmt.Errorf("Error reading Disk: %s", err)
 	}
+	if err := d.Set("provisioned_iops", flattenComputeDiskProvisionedIops(res["provisionedIops"], d, config)); err != nil {
+		return fmt.Errorf("Error reading Disk: %s", err)
+	}
 	if err := d.Set("zone", flattenComputeDiskZone(res["zone"], d, config)); err != nil {
 		return fmt.Errorf("Error reading Disk: %s", err)
 	}
@@ -1109,6 +1124,23 @@ func flattenComputeDiskImage(v interface{}, d *schema.ResourceData, config *Conf
 	return v
 }
 
+func flattenComputeDiskProvisionedIops(v interface{}, d *schema.ResourceData, config *Config) interface{} {
+	// Handles the string fixed64 format
+	if strVal, ok := v.(string); ok {
+		if intVal, err := strconv.ParseInt(strVal, 10, 64); err == nil {
+			return intVal
+		}
+	}
+
+	// number values are represented as float64
+	if floatVal, ok := v.(float64); ok {
+		intVal := int(floatVal)
+		return intVal
+	}
+
+	return v // let terraform core handle it otherwise
+}
+
 func flattenComputeDiskZone(v interface{}, d *schema.ResourceData, config *Config) interface{} {
 	if v == nil {
 		return v
@@ -1279,6 +1311,10 @@ func expandComputeDiskImage(v interface{}, d TerraformResourceData, config *Conf
 	return v, nil
 }
 
+func expandComputeDiskProvisionedIops(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	return v, nil
+}
+
 func expandComputeDiskZone(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
 	f, err := parseGlobalFieldValue("zones", v.(string), "project", d, config, true)
 	if err != nil {

google/resource_compute_disk_resource_policy_attachment_test.go

@@ -50,12 +50,13 @@ data "google_compute_image" "my_image" {
 resource "google_compute_disk" "foobar" {
   name  = "%s"
   image = data.google_compute_image.my_image.self_link
-  size  = 50
-  type  = "pd-ssd"
-  zone  = "us-central1-a"
+  size  = 1000
+  type  = "pd-extreme"
+  zone  = "us-central1-c"
   labels = {
     my-label = "my-label-value"
   }
+  provisioned_iops = 90000
 }
 
 resource "google_compute_resource_policy" "foobar" {
@@ -74,7 +75,7 @@ resource "google_compute_resource_policy" "foobar" {
 resource "google_compute_disk_resource_policy_attachment" "foobar" {
   name = google_compute_resource_policy.foobar.name
   disk = google_compute_disk.foobar.name
-  zone = "us-central1-a"
+  zone = "us-central1-c"
 }
 `, diskName, policyName)
 }

website/docs/r/compute_disk.html.markdown

@@ -156,6 +156,10 @@ The following arguments are supported:
   (Optional, [Beta](https://terraform.io/docs/providers/google/guides/provider_versions.html))
   Indicates whether or not the disk can be read/write attached to more than one instance.
 
+* `provisioned_iops` -
+  (Optional)
+  Indicates how many IOPS must be provisioned for the disk.
+
 * `zone` -
   (Optional)
   A reference to the zone where the disk resides.