Merge pull request #4013 from artburkart/closes_3999

Closes #3999 - Support VirtualBox Trim/Discard

builder/virtualbox/iso/builder.go

@@ -37,17 +37,19 @@ type Config struct {
 	vboxcommon.VBoxManagePostConfig `mapstructure:",squash"`
 	vboxcommon.VBoxVersionConfig    `mapstructure:",squash"`
 
-	BootCommand          []string `mapstructure:"boot_command"`
-	DiskSize             uint     `mapstructure:"disk_size"`
-	KeepRegistered       bool     `mapstructure:"keep_registered"`
-	GuestAdditionsMode   string   `mapstructure:"guest_additions_mode"`
-	GuestAdditionsPath   string   `mapstructure:"guest_additions_path"`
-	GuestAdditionsURL    string   `mapstructure:"guest_additions_url"`
-	GuestAdditionsSHA256 string   `mapstructure:"guest_additions_sha256"`
-	GuestOSType          string   `mapstructure:"guest_os_type"`
-	HardDriveInterface   string   `mapstructure:"hard_drive_interface"`
-	ISOInterface         string   `mapstructure:"iso_interface"`
-	VMName               string   `mapstructure:"vm_name"`
+	BootCommand            []string `mapstructure:"boot_command"`
+	DiskSize               uint     `mapstructure:"disk_size"`
+	KeepRegistered         bool     `mapstructure:"keep_registered"`
+	GuestAdditionsMode     string   `mapstructure:"guest_additions_mode"`
+	GuestAdditionsPath     string   `mapstructure:"guest_additions_path"`
+	GuestAdditionsURL      string   `mapstructure:"guest_additions_url"`
+	GuestAdditionsSHA256   string   `mapstructure:"guest_additions_sha256"`
+	GuestOSType            string   `mapstructure:"guest_os_type"`
+	HardDriveInterface     string   `mapstructure:"hard_drive_interface"`
+	HardDriveNonrotational bool     `mapstructure:"hard_drive_nonrotational"`
+	HardDriveDiscard       bool     `mapstructure:"hard_drive_discard"`
+	ISOInterface           string   `mapstructure:"iso_interface"`
+	VMName                 string   `mapstructure:"vm_name"`
 
 	ctx interpolate.Context
 }

builder/virtualbox/iso/step_create_disk.go

@@ -82,6 +82,16 @@ func (s *stepCreateDisk) Run(state multistep.StateBag) multistep.StepAction {
 		controllerName = "SCSI Controller"
 	}
 
+	nonrotational := "off"
+	if config.HardDriveNonrotational {
+		nonrotational = "on"
+	}
+
+	discard := "off"
+	if config.HardDriveDiscard {
+		discard = "on"
+	}
+
 	command = []string{
 		"storageattach", vmName,
 		"--storagectl", controllerName,
@@ -89,6 +99,8 @@ func (s *stepCreateDisk) Run(state multistep.StateBag) multistep.StepAction {
 		"--device", "0",
 		"--type", "hdd",
 		"--medium", path,
+		"--nonrotational", nonrotational,
+		"--discard", discard,
 	}
 	if err := driver.VBoxManage(command...); err != nil {
 		err := fmt.Errorf("Error attaching hard drive: %s", err)

website/source/docs/builders/virtualbox-iso.html.md

@@ -153,7 +153,7 @@ builder.
 -   `floppy_dirs` (array of strings) - A list of directories to place onto
     the floppy disk recursively. This is similar to the `floppy_files` option
     except that the directory structure is preserved. This is useful for when
-    your floppy disk includes drivers or if you just want to organize it's 
+    your floppy disk includes drivers or if you just want to organize its
     contents as a hierarchy. Wildcard characters (\*, ?, and \[\]) are allowed.
 
 -   `format` (string) - Either "ovf" or "ova", this specifies the output format
@@ -196,6 +196,13 @@ builder.
     is attached to an AHCI SATA controller. When set to "scsi", the drive is
     attached to an LsiLogic SCSI controller.
 
+-   `hard_drive_nonrotational` (boolean) - Forces some guests (i.e. Windows 7+)
+    to treat disks as SSDs and stops them from performing disk fragmentation.
+
+-   `hard_drive_discard` (boolean) - When this value is set to true, a VDI
+    image will be shrunk in response to the trim command from the guest OS.
+    The size of the cleared area must be at least 1MB.
+
 -   `headless` (boolean) - Packer defaults to building VirtualBox virtual
     machines by launching a GUI that shows the console of the machine
     being built. When this value is set to true, the machine will start without