Add existing HDD to VM

[byumov]

Hi! Sorry for i am asking here =\

I want to add existind HDD from one VM to another.

I am trying something like this. Get disks:

for _, device := range devices {
        currentDeviceLabel := device.GetVirtualDevice().DeviceInfo.GetDescription().Label
        if strings.Contains(strings.ToLower(currentDeviceLabel), "hard disk"){
        disks = append(disks, device)
    }    
return disks

And try connect received disk to another VM:

func addDisk(vm *object.VirtualMachine, disk types.BaseVirtualDevice) {

    ctx, cancel := context.WithCancel(context.Background())
    defer cancel()

    spec := types.VirtualMachineConfigSpec{

        DeviceChange : []types.BaseVirtualDeviceConfigSpec {

            &types.VirtualDeviceConfigSpec{

                Operation: types.VirtualDeviceConfigSpecOperationAdd,
                FileOperation: types.VirtualDeviceConfigSpecFileOperationCreate,
                Device: disk,
            },

        },
    }

    result, err := vm.Reconfigure(ctx, spec)
    if err != nil {
        log.Fatal(fmt.Sprintf("err: %s", err.Error()))

    }

I get error: Cannot complete the operation because the file or folder [xxxxxx] xxxxxx/xxxxxx.vmdk already exists
How i can add existing disk? Thanks!

[dougm]

Just don't specify FileOperation if the disk already exists.

The govc vm.disk.attach command does this using the VirtualDeviceList helpers: https://github.com/vmware/govmomi/blob/toolbox-archive/govc/vm/disk/attach.go#L64

In that command, CapacityInKB == 0, but in vm.disk.create CapacityInKB > 0:
https://github.com/vmware/govmomi/blob/master/object/virtual_machine.go#L390

[byumov]

@dougm, it helped, thank you!

Working code, maybe it will be helpful for somebody:

spec := types.VirtualMachineConfigSpec{}
config := &types.VirtualDeviceConfigSpec{
    Device:    disk,
    Operation: types.VirtualDeviceConfigSpecOperationAdd,
}
spec.DeviceChange = append(spec.DeviceChange, config)

result, err := vm.Reconfigure(ctx, spec)
if err != nil {
    log.Fatal(fmt.Sprintf("err: %s", err.Error()))

}