hardware step uses vSphere driver

driver.go

@@ -129,3 +129,31 @@ func (d *Driver) destroyVM(vm *object.VirtualMachine) error {
 	}
 	return nil
 }
+
+func (d *Driver) configureVM(vm *object.VirtualMachine, config *HardwareConfig) error {
+	var confSpec types.VirtualMachineConfigSpec
+	confSpec.NumCPUs = config.CPUs
+	confSpec.MemoryMB = config.RAM
+
+	var cpuSpec types.ResourceAllocationInfo
+	cpuSpec.Reservation = config.CPUReservation
+	cpuSpec.Limit = config.CPULimit
+	confSpec.CpuAllocation = &cpuSpec
+
+	var ramSpec types.ResourceAllocationInfo
+	ramSpec.Reservation = config.RAMReservation
+	confSpec.MemoryAllocation = &ramSpec
+
+	confSpec.MemoryReservationLockedToMax = &config.RAMReserveAll
+
+	task, err := vm.Reconfigure(d.ctx, confSpec)
+	if err != nil {
+		return err
+	}
+	_, err = task.WaitForResult(d.ctx, nil)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

step_hardware.go

@@ -3,7 +3,6 @@ package main
 import (
 	"github.com/mitchellh/multistep"
 	"github.com/hashicorp/packer/packer"
-	"github.com/vmware/govmomi/vim25/types"
 	"github.com/vmware/govmomi/object"
 	"fmt"
 )
@@ -39,27 +38,7 @@ func (s *StepConfigureHardware) Run(state multistep.StateBag) multistep.StepActi
 	if *s.config != (HardwareConfig{}) {
 		ui.Say("Customizing hardware parameters...")
 
-		var confSpec types.VirtualMachineConfigSpec
-		confSpec.NumCPUs = s.config.CPUs
-		confSpec.MemoryMB = s.config.RAM
-
-		var cpuSpec types.ResourceAllocationInfo
-		cpuSpec.Reservation = s.config.CPUReservation
-		cpuSpec.Limit = s.config.CPULimit
-		confSpec.CpuAllocation = &cpuSpec
-
-		var ramSpec types.ResourceAllocationInfo
-		ramSpec.Reservation = s.config.RAMReservation
-		confSpec.MemoryAllocation = &ramSpec
-
-		confSpec.MemoryReservationLockedToMax = &s.config.RAMReserveAll
-
-		task, err := vm.Reconfigure(d.ctx, confSpec)
-		if err != nil {
-			state.Put("error", err)
-			return multistep.ActionHalt
-		}
-		_, err = task.WaitForResult(d.ctx, nil)
+		err := d.configureVM(vm, s.config)
 		if err != nil {
 			state.Put("error", err)
 			return multistep.ActionHalt