Configurable disk types for GCE

Supports configuring the disk type for Google Compute Engine disk
resources. Both `google_compute_disk` and `google_compute_instance`
disk types are supported.

Resolves #351.

builtin/providers/google/disk_type.go

@@ -0,0 +1,15 @@
+package google
+
+import (
+	"code.google.com/p/google-api-go-client/compute/v1"
+)
+
+// readDiskType finds the disk type with the given name.
+func readDiskType(c *Config, zone *compute.Zone, name string) (*compute.DiskType, error) {
+	diskType, err := c.clientCompute.DiskTypes.Get(c.Project, zone.Name, name).Do()
+	if err == nil && diskType != nil && diskType.SelfLink != "" {
+		return diskType, nil
+	} else {
+		return nil, err
+	}
+}

builtin/providers/google/resource_compute_disk.go

@@ -40,6 +40,12 @@ func resourceComputeDisk() *schema.Resource {
 				Optional: true,
 				ForceNew: true,
 			},
+
+			"type": &schema.Schema{
+				Type:	  schema.TypeString,
+				Optional: true,
+				ForceNew: true,
+			},
 		},
 	}
 }
@@ -47,6 +53,15 @@ func resourceComputeDisk() *schema.Resource {
 func resourceComputeDiskCreate(d *schema.ResourceData, meta interface{}) error {
 	config := meta.(*Config)
 
+	// Get the zone
+	log.Printf("[DEBUG] Loading zone: %s", d.Get("zone").(string))
+	zone, err := config.clientCompute.Zones.Get(
+		config.Project, d.Get("zone").(string)).Do()
+	if err != nil {
+		return fmt.Errorf(
+			"Error loading zone '%s': %s", d.Get("zone").(string), err)
+	}
+
 	// Build the disk parameter
 	disk := &compute.Disk{
 		Name:   d.Get("name").(string),
@@ -66,6 +81,18 @@ func resourceComputeDiskCreate(d *schema.ResourceData, meta interface{}) error {
 		disk.SourceImage = image.SelfLink
 	}
 
+	if v, ok := d.GetOk("type"); ok {
+		log.Printf("[DEBUG] Loading disk type: %s", v.(string))
+		diskType, err := readDiskType(config, zone, v.(string))
+		if err != nil {
+			return fmt.Errorf(
+				"Error loading disk type '%s': %s",
+				v.(string), err)
+		}
+
+		disk.Type = diskType.SelfLink
+	}
+
 	op, err := config.clientCompute.Disks.Insert(
 		config.Project, d.Get("zone").(string), disk).Do()
 	if err != nil {

builtin/providers/google/resource_compute_disk_test.go

@@ -80,5 +80,6 @@ resource "google_compute_disk" "foobar" {
 	name = "terraform-test"
 	image = "debian-7-wheezy-v20140814"
 	size = 50
+	type = "pd-ssd"
 	zone = "us-central1-a"
 }`

builtin/providers/google/resource_compute_instance.go

@@ -60,6 +60,13 @@ func resourceComputeInstance() *schema.Resource {
 							Type:     schema.TypeString,
 							Optional: true,
 						},
+
+						"type": &schema.Schema{
+							Type:     schema.TypeString,
+							Optional: true,
+							ForceNew: true,
+						},
+
 						"auto_delete": &schema.Schema{
 							Type:     schema.TypeBool,
 							Optional: true,
@@ -197,6 +204,18 @@ func resourceComputeInstanceCreate(d *schema.ResourceData, meta interface{}) err
 			}
 		}
 
+                if v, ok := d.GetOk(prefix + ".type"); ok {
+			diskTypeName := v.(string)
+			diskType, err := readDiskType(config, zone, diskTypeName)
+			if err != nil {
+				return fmt.Errorf(
+					"Error loading disk type '%s': %s",
+					diskTypeName, err)
+			}
+
+			disk.InitializeParams.DiskType = diskType.SelfLink
+		}
+
 		disks = append(disks, &disk)
 	}
 

builtin/providers/google/resource_compute_instance_test.go

@@ -298,6 +298,7 @@ resource "google_compute_instance" "foobar" {
 	disk {
 		disk = "terraform-test-disk"
 		auto_delete = false
+		type = "pd-ssd"
 	}
 
 	network {

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

@@ -13,6 +13,7 @@ Creates a new persistent disk within GCE, based on another disk.
 ```
 resource "google_compute_disk" "default" {
 	name = "test-disk"
+	type = "pd-ssd"
 	zone = "us-central1-a"
 	image = "debian7-wheezy"
 }
@@ -32,6 +33,8 @@ The following arguments are supported:
 * `size` - (Optional) The size of the image in gigabytes. If not specified,
     it will inherit the size of its base image.
 
+* `type` - (Optional) The GCE disk type.
+
 ## Attributes Reference
 
 The following attributes are exported:

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

@@ -67,6 +67,8 @@ The `disk` block supports:
 * `auto_delete` - (Optional) Whether or not the disk should be auto-deleted.
     This defaults to true.
 
+* `type` - (Optional) The GCE disk type.
+
 The `network` block supports:
 
 * `source` - (Required) The name of the network to attach this interface to.