image_to_vm: add support for hyper-v vhdx format

Add support for Gen 2 Hyper-V VMs.

`./image_to_vm` tool has now a new supported format: `hyperv_vhdx`,
that produces .vhdx dynamic disks.

How to use:

```bash
 ./image_to_vm.sh --from ../build/images/amd64-usr/developer-latest/ --format hyperv_vhdx
```

See: flatcar/Flatcar#1009

Uses PR: flatcar/bootengine#92

Signed-off-by: Adrian Vladu <avladu@cloudbasesolutions.com>

Author: ader1990

build_library/release_util.sh

@@ -89,7 +89,7 @@ compress_disk_images() {
     # We want to compress images, but we also want to remove the uncompressed files
     # from the list of uploadable files.
     for filename in "${local_files_to_evaluate[@]}"; do
-        if [[ "${filename}" =~ \.(img|bin|vdi|vhd|vmdk)$ ]]; then
+        if [[ "${filename}" =~ \.(img|bin|vdi|vhd|vhdx|vmdk)$ ]]; then
             # Parse the formats as an array. This will yield an extra empty
             # array element at the end.
             readarray -td, FORMATS<<<"${FLAGS_image_compression_formats},"

build_library/vm_image_util.sh

@@ -16,6 +16,7 @@ VALID_IMG_TYPES=(
     exoscale
     gce
     hyperv
+    hyperv_vhdx
     iso
     openstack
     openstack_mini
@@ -297,6 +298,11 @@ IMG_azure_OEM_SYSEXT=oem-azure
 IMG_hyperv_DISK_FORMAT=vhd
 IMG_hyperv_OEM_PACKAGE=oem-hyperv
 
+## hyper-v vhdx
+IMG_hyperv_vhdx_DISK_FORMAT=vhdx
+IMG_hyperv_vhdx_OEM_PACKAGE=oem-hyperv
+
+
 ## cloudsigma
 IMG_cloudsigma_DISK_FORMAT=qcow2
 IMG_cloudsigma_OEM_PACKAGE=oem-cloudsigma
@@ -431,7 +437,9 @@ _disk_ext() {
         vmdk_scsi) echo vmdk;;
         vmdk_stream) echo vmdk;;
         hdd) echo hdd;;
-        vhd*) echo vhd;;
+        vhd) echo vhd;;
+        vhd_fixed) echo vhd;;
+        vhdx) echo vhdx;;
         *) echo "${disk_format}";;
     esac
 }
@@ -620,6 +628,11 @@ _write_vhd_fixed_disk() {
     assert_image_size "$2" vpc
 }
 
+_write_vhdx_disk() {
+    qemu-img convert -f raw "$1" -O vhdx -o subformat=dynamic "$2"
+    assert_image_size "$2" vhdx
+}
+
 _write_vmdk_ide_disk() {
     qemu-img convert -f raw "$1" -O vmdk -o adapter_type=ide "$2"
     assert_image_size "$2" vmdk

changelog/changes/2024-03-26-hyperv-vhdx-images.md

@@ -0,0 +1 @@
+- Added Hyper-V VHDX image ([flatcar/scripts#1791](https://github.com/flatcar/scripts/pull/1791))