provider/openstack: multi ephemeral support

This commit adds the ability to create instances with multiple
ephemeral disks. The ephemeral disks will appear as local block
devices to the instance.

builtin/providers/openstack/resource_openstack_compute_instance_v2.go

@@ -191,13 +191,13 @@ func resourceComputeInstanceV2() *schema.Resource {
 				ForceNew: true,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
-						"uuid": &schema.Schema{
+						"source_type": &schema.Schema{
 							Type:     schema.TypeString,
 							Required: true,
 						},
-						"source_type": &schema.Schema{
+						"uuid": &schema.Schema{
 							Type:     schema.TypeString,
-							Required: true,
+							Optional: true,
 						},
 						"volume_size": &schema.Schema{
 							Type:     schema.TypeInt,
@@ -216,6 +216,10 @@ func resourceComputeInstanceV2() *schema.Resource {
 							Optional: true,
 							Default:  false,
 						},
+						"guest_format": &schema.Schema{
+							Type:     schema.TypeString,
+							Optional: true,
+						},
 					},
 				},
 			},
@@ -380,14 +384,10 @@ func resourceComputeInstanceV2Create(d *schema.ResourceData, meta interface{}) e
 	}
 
 	if vL, ok := d.GetOk("block_device"); ok {
-		for _, v := range vL.([]interface{}) {
-			blockDeviceRaw := v.(map[string]interface{})
-			blockDevice := resourceInstanceBlockDeviceV2(d, blockDeviceRaw)
-			createOpts = &bootfromvolume.CreateOptsExt{
-				CreateOptsBuilder: createOpts,
-				BlockDevice:       blockDevice,
-			}
-			log.Printf("[DEBUG] Create BFV Options: %+v", createOpts)
+		blockDevices := resourceInstanceBlockDevicesV2(d, vL.([]interface{}))
+		createOpts = &bootfromvolume.CreateOptsExt{
+			createOpts,
+			blockDevices,
 		}
 	}
 
@@ -1091,20 +1091,24 @@ func resourceInstanceMetadataV2(d *schema.ResourceData) map[string]string {
 	return m
 }
 
-func resourceInstanceBlockDeviceV2(d *schema.ResourceData, bd map[string]interface{}) []bootfromvolume.BlockDevice {
-	sourceType := bootfromvolume.SourceType(bd["source_type"].(string))
-	bfvOpts := []bootfromvolume.BlockDevice{
-		bootfromvolume.BlockDevice{
-			UUID:                bd["uuid"].(string),
+func resourceInstanceBlockDevicesV2(d *schema.ResourceData, bds []interface{}) []bootfromvolume.BlockDevice {
+	blockDeviceOpts := make([]bootfromvolume.BlockDevice, len(bds))
+	for i, bd := range bds {
+		bdM := bd.(map[string]interface{})
+		sourceType := bootfromvolume.SourceType(bdM["source_type"].(string))
+		blockDeviceOpts[i] = bootfromvolume.BlockDevice{
+			UUID:                bdM["uuid"].(string),
 			SourceType:          sourceType,
-			VolumeSize:          bd["volume_size"].(int),
-			DestinationType:     bd["destination_type"].(string),
-			BootIndex:           bd["boot_index"].(int),
-			DeleteOnTermination: bd["delete_on_termination"].(bool),
-		},
+			VolumeSize:          bdM["volume_size"].(int),
+			DestinationType:     bdM["destination_type"].(string),
+			BootIndex:           bdM["boot_index"].(int),
+			DeleteOnTermination: bdM["delete_on_termination"].(bool),
+			GuestFormat:         bdM["guest_format"].(string),
+		}
 	}
 
-	return bfvOpts
+	log.Printf("[DEBUG] Block Device Options: %+v", blockDeviceOpts)
+	return blockDeviceOpts
 }
 
 func resourceInstanceSchedulerHintsV2(d *schema.ResourceData, schedulerHintsRaw map[string]interface{}) schedulerhints.SchedulerHints {
@@ -1142,10 +1146,19 @@ func resourceInstanceSchedulerHintsV2(d *schema.ResourceData, schedulerHintsRaw
 }
 
 func getImageIDFromConfig(computeClient *gophercloud.ServiceClient, d *schema.ResourceData) (string, error) {
-	// If block_device was used, an Image does not need to be specified.
-	// If an Image was specified, ignore it
-	if _, ok := d.GetOk("block_device"); ok {
-		return "", nil
+	// If block_device was used, an Image does not need to be specified, unless an image/local
+	// combination was used. This emulates normal boot behavior. Otherwise, ignore the image altogether.
+	if vL, ok := d.GetOk("block_device"); ok {
+		needImage := false
+		for _, v := range vL.([]interface{}) {
+			vM := v.(map[string]interface{})
+			if vM["source_type"] == "image" && vM["destination_type"] == "local" {
+				needImage = true
+			}
+		}
+		if !needImage {
+			return "", nil
+		}
 	}
 
 	if imageId := d.Get("image_id").(string); imageId != "" {
@@ -1177,11 +1190,20 @@ func getImageIDFromConfig(computeClient *gophercloud.ServiceClient, d *schema.Re
 }
 
 func setImageInformation(computeClient *gophercloud.ServiceClient, server *servers.Server, d *schema.ResourceData) error {
-	// If block_device was used, an Image does not need to be specified.
-	// If an Image was specified, ignore it
-	if _, ok := d.GetOk("block_device"); ok {
-		d.Set("image_id", "Attempt to boot from volume - no image supplied")
-		return nil
+	// If block_device was used, an Image does not need to be specified, unless an image/local
+	// combination was used. This emulates normal boot behavior. Otherwise, ignore the image altogether.
+	if vL, ok := d.GetOk("block_device"); ok {
+		needImage := false
+		for _, v := range vL.([]interface{}) {
+			vM := v.(map[string]interface{})
+			if vM["source_type"] == "image" && vM["destination_type"] == "local" {
+				needImage = true
+			}
+		}
+		if !needImage {
+			d.Set("image_id", "Attempt to boot from volume - no image supplied")
+			return nil
+		}
 	}
 
 	imageId := server.Image["id"].(string)
@@ -1395,8 +1417,11 @@ func checkVolumeConfig(d *schema.ResourceData) error {
 	}
 
 	if vL, ok := d.GetOk("block_device"); ok {
-		if len(vL.([]interface{})) > 1 {
-			return fmt.Errorf("Can only specify one block device to boot from.")
+		for _, v := range vL.([]interface{}) {
+			vM := v.(map[string]interface{})
+			if vM["source_type"] != "blank" && vM["uuid"] == "" {
+				return fmt.Errorf("You must specify a uuid for %s block device types", vM["source_type"])
+			}
 		}
 	}
 

builtin/providers/openstack/resource_openstack_compute_instance_v2_test.go

@@ -459,6 +459,53 @@ func TestAccComputeV2Instance_personality(t *testing.T) {
 	})
 }
 
+func TestAccComputeV2Instance_multiEphemeral(t *testing.T) {
+	var instance servers.Server
+	var testAccComputeV2Instance_multiEphemeral = fmt.Sprintf(`
+		resource "openstack_compute_instance_v2" "foo" {
+			name = "terraform-test"
+			security_groups = ["default"]
+			block_device {
+				boot_index = 0
+				delete_on_termination = true
+				destination_type = "local"
+				source_type = "image"
+				uuid = "%s"
+			}
+			block_device {
+				boot_index = -1
+				delete_on_termination = true
+				destination_type = "local"
+				guest_format = "ext4"
+				source_type = "blank"
+				volume_size = 1
+			}
+			block_device {
+				boot_index = -1
+				delete_on_termination = true
+				destination_type = "local"
+				guest_format = "ext4"
+				source_type = "blank"
+				volume_size = 1
+			}
+		}`,
+		os.Getenv("OS_IMAGE_ID"))
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeV2InstanceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccComputeV2Instance_multiEphemeral,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeV2InstanceExists(t, "openstack_compute_instance_v2.foo", &instance),
+				),
+			},
+		},
+	})
+}
+
 func testAccCheckComputeV2InstanceDestroy(s *terraform.State) error {
 	config := testAccProvider.Meta().(*Config)
 	computeClient, err := config.computeV2Client(OS_REGION_NAME)

website/source/docs/providers/openstack/r/compute_instance_v2.html.markdown

@@ -82,6 +82,8 @@ The following arguments are supported:
 
 * `block_device` - (Optional) The object for booting by volume. The block_device
     object structure is documented below. Changing this creates a new server.
+    You can specify multiple block devices which will create an instance with
+    multiple ephemeral (local) disks.
 
 * `volume` - (Optional) Attach an existing volume to the instance. The volume
     structure is described below.
@@ -187,6 +189,8 @@ The following attributes are exported:
 
 ## Notes
 
+### Floating IPs
+
 Floating IPs can be associated in one of two ways:
 
 * You can specify a Floating IP address by using the top-level `floating_ip`
@@ -199,3 +203,46 @@ defined in the `network` block. Each `network` block can have its own floating
 IP address.
 
 Only one of the above methods can be used.
+
+### Multiple Ephemeral Disks
+
+It's possible to specify multiple `block_device` entries to create an instance
+with multiple ephemeral (local) disks. In order to create multiple ephemeral
+disks, the sum of the total amount of ephemeral space must be less than or
+equal to what the chosen flavor supports.
+
+The following example shows how to create an instance with multiple ephemeral
+disks:
+
+```
+resource "openstack_compute_instance_v2" "foo" {
+  name = "terraform-test"
+  security_groups = ["default"]
+
+  block_device {
+    boot_index = 0
+    delete_on_termination = true
+    destination_type = "local"
+    source_type = "image"
+    uuid = "<image uuid>"
+  }
+
+  block_device {
+    boot_index = -1
+    delete_on_termination = true
+    destination_type = "local"
+    guest_format = "ext4"
+    source_type = "blank"
+    volume_size = 1
+  }
+
+  block_device {
+    boot_index = -1
+    delete_on_termination = true
+    destination_type = "local"
+    guest_format = "ext4"
+    source_type = "blank"
+    volume_size = 1
+  }
+}
+```