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Qemu 6.1 support

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Handle the deprecated use of backing file without explicit backing format issue.
This commit is contained in:
grossmj 2021-09-05 18:34:37 +09:30
parent a55c9a5c6a
commit ed336da304
2 changed files with 34 additions and 21 deletions
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39
gns3server/compute/qemu/qemu_vm.py
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@ -1647,23 +1647,16 @@ class QemuVM(BaseNode):
def _get_qemu_img(self):
"""
Search the qemu-img binary in the same binary of the qemu binary
for avoiding version incompatibility.
to avoid version incompatibility.
:returns: qemu-img path or raise an error
"""
qemu_img_path = ""
qemu_path_dir = os.path.dirname(self.qemu_path)
try:
for f in os.listdir(qemu_path_dir):
if f.startswith("qemu-img"):
qemu_img_path = os.path.join(qemu_path_dir, f)
except OSError as e:
raise QemuError("Error while looking for qemu-img in {}: {}".format(qemu_path_dir, e))
if not qemu_img_path:
raise QemuError("Could not find qemu-img in {}".format(qemu_path_dir))
return qemu_img_path
qemu_image_path = shutil.which("qemu-img", path=qemu_path_dir)
if qemu_image_path:
return qemu_image_path
raise QemuError("Could not find qemu-img in {}".format(qemu_path_dir))
async def _qemu_img_exec(self, command):
@ -1677,10 +1670,28 @@ class QemuVM(BaseNode):
log.info("{} returned with {}".format(self._get_qemu_img(), retcode))
return retcode
async def _find_disk_file_format(self, disk):
qemu_img_path = self._get_qemu_img()
try:
output = await subprocess_check_output(qemu_img_path, "info", "--output=json", disk)
except subprocess.SubprocessError as e:
raise QemuError("Error received while checking Qemu disk format: {}".format(e))
if output:
try:
json_data = json.loads(output)
except ValueError as e:
raise QemuError("Invalid JSON data returned by qemu-img: {}".format(e))
return json_data.get("format")
async def _create_linked_clone(self, disk_name, disk_image, disk):
try:
qemu_img_path = self._get_qemu_img()
command = [qemu_img_path, "create", "-o", "backing_file={}".format(disk_image), "-f", "qcow2", disk]
backing_file_format = await self._find_disk_file_format(disk_image)
if not backing_file_format:
raise QemuError("Could not detect format for disk image: {}".format(disk_image))
command = [qemu_img_path, "create", "-o", "backing_file={}".format(disk_image), "-F", backing_file_format, "-f", "qcow2", disk]
try:
base_qcow2 = Qcow2(disk_image)
if base_qcow2.crypt_method:

16
tests/compute/qemu/test_qemu_vm.py
View File

@ -354,11 +354,12 @@ async def test_disk_options(vm, tmpdir, fake_qemu_img_binary):
vm._hda_disk_image = str(tmpdir / "test.qcow2")
open(vm._hda_disk_image, "w+").close()
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
options = await vm._disk_options()
assert process.called
args, kwargs = process.call_args
assert args == (fake_qemu_img_binary, "create", "-o", "backing_file={}".format(vm._hda_disk_image), "-f", "qcow2", os.path.join(vm.working_dir, "hda_disk.qcow2"))
with asyncio_patch("gns3server.compute.qemu.qemu_vm.QemuVM._find_disk_file_format", return_value="qcow2"):
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
options = await vm._disk_options()
assert process.called
args, kwargs = process.call_args
assert args == (fake_qemu_img_binary, "create", "-o", "backing_file={}".format(vm._hda_disk_image), "-F", "qcow2", "-f", "qcow2", os.path.join(vm.working_dir, "hda_disk.qcow2"))
assert options == ['-drive', 'file=' + os.path.join(vm.working_dir, "hda_disk.qcow2") + ',if=ide,index=0,media=disk,id=drive0']
@ -411,8 +412,9 @@ async def test_disk_options_multiple_disk(vm, tmpdir, fake_qemu_img_binary):
open(vm._hdc_disk_image, "w+").close()
open(vm._hdd_disk_image, "w+").close()
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()):
options = await vm._disk_options()
with asyncio_patch("gns3server.compute.qemu.qemu_vm.QemuVM._find_disk_file_format", return_value="qcow2"):
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()):
options = await vm._disk_options()
assert options == [
'-drive', 'file=' + os.path.join(vm.working_dir, "hda_disk.qcow2") + ',if=ide,index=0,media=disk,id=drive0',