def copy_qcow2_image(base, target, size): # TODO(pbrady): Consider copying the cow image here # with preallocation=metadata set for performance reasons. # This would be keyed on a 'preallocate_images' setting. libvirt_utils.create_cow_image(base, target) if size: disk.extend(target, size, use_cow=True)
def test_extend_qcow_success(self): imgfile = tempfile.NamedTemporaryFile() imgsize = 10 device = "/dev/sdh" use_cow = True self.flags(resize_fs_using_block_device=True) mounter = FakeMount.instance_for_format(imgfile, None, None, 'qcow2') mounter.device = device self.mox.StubOutWithMock(api, 'can_resize_image') self.mox.StubOutWithMock(utils, 'execute') self.mox.StubOutWithMock(api, 'is_image_extendable') self.mox.StubOutWithMock(mounter, 'get_dev') self.mox.StubOutWithMock(mounter, 'unget_dev') self.mox.StubOutWithMock(api, 'resize2fs') self.mox.StubOutWithMock(mount.Mount, 'instance_for_format', use_mock_anything=True) api.can_resize_image(imgfile, imgsize).AndReturn(True) utils.execute('qemu-img', 'resize', imgfile, imgsize) api.is_image_extendable(imgfile, use_cow).AndReturn(True) mount.Mount.instance_for_format(imgfile, None, None, 'qcow2').AndReturn(mounter) mounter.get_dev().AndReturn(True) api.resize2fs(mounter.device, run_as_root=True, check_exit_code=[0]) mounter.unget_dev() self.mox.ReplayAll() api.extend(imgfile, imgsize, use_cow=use_cow)
def test_extend_qcow_success(self): imgfile = tempfile.NamedTemporaryFile() imgsize = 10 device = "/dev/sdh" use_cow = True self.flags(resize_fs_using_block_device=True) mounter = FakeMount.instance_for_format( imgfile, None, None, 'qcow2') mounter.device = device self.mox.StubOutWithMock(api, 'can_resize_image') self.mox.StubOutWithMock(utils, 'execute') self.mox.StubOutWithMock(api, 'is_image_extendable') self.mox.StubOutWithMock(mounter, 'get_dev') self.mox.StubOutWithMock(mounter, 'unget_dev') self.mox.StubOutWithMock(api, 'resize2fs') self.mox.StubOutWithMock(mount.Mount, 'instance_for_format', use_mock_anything=True) api.can_resize_image(imgfile, imgsize).AndReturn(True) utils.execute('qemu-img', 'resize', imgfile, imgsize) api.is_image_extendable(imgfile, use_cow).AndReturn(True) mount.Mount.instance_for_format( imgfile, None, None, 'qcow2').AndReturn(mounter) mounter.get_dev().AndReturn(True) api.resize2fs(mounter.device, run_as_root=True, check_exit_code=[0]) mounter.unget_dev() self.mox.ReplayAll() api.extend(imgfile, imgsize, use_cow=use_cow)
def test_extend_raw_success(self): imgfile = tempfile.NamedTemporaryFile() imgsize = 10 use_cow = False self.mox.StubOutWithMock(api, 'can_resize_image') self.mox.StubOutWithMock(utils, 'execute') self.mox.StubOutWithMock(api, 'is_image_extendable') self.mox.StubOutWithMock(api, 'resize2fs') api.can_resize_image(imgfile, imgsize).AndReturn(True) utils.execute('qemu-img', 'resize', imgfile, imgsize) api.is_image_extendable(imgfile, use_cow).AndReturn(True) api.resize2fs(imgfile, run_as_root=False, check_exit_code=[0]) self.mox.ReplayAll() api.extend(imgfile, imgsize, use_cow=use_cow)
def create_image(self, prepare_template, base, size, *args, **kwargs): filename = self._get_lock_name(base) @utils.synchronized(filename, external=True, lock_path=self.lock_path) def copy_qcow2_image(base, target, size): # TODO(pbrady): Consider copying the cow image here # with preallocation=metadata set for performance reasons. # This would be keyed on a 'preallocate_images' setting. libvirt_utils.create_cow_image(base, target) if size: disk.extend(target, size, use_cow=True) # Download the unmodified base image unless we already have a copy. if not os.path.exists(base): prepare_template(target=base, max_size=size, *args, **kwargs) self.verify_base_size(base, size) legacy_backing_size = None legacy_base = base # Determine whether an existing qcow2 disk uses a legacy backing by # actually looking at the image itself and parsing the output of the # backing file it expects to be using. if os.path.exists(self.path): backing_path = libvirt_utils.get_disk_backing_file(self.path) if backing_path is not None: backing_file = os.path.basename(backing_path) backing_parts = backing_file.rpartition('_') if backing_file != backing_parts[-1] and \ backing_parts[-1].isdigit(): legacy_backing_size = int(backing_parts[-1]) legacy_base += '_%d' % legacy_backing_size legacy_backing_size *= units.Gi # Create the legacy backing file if necessary. if legacy_backing_size: if not os.path.exists(legacy_base): with fileutils.remove_path_on_error(legacy_base): libvirt_utils.copy_image(base, legacy_base) disk.extend(legacy_base, legacy_backing_size, use_cow=True) if not os.path.exists(self.path): with fileutils.remove_path_on_error(self.path): copy_qcow2_image(base, self.path, size)
def copy_raw_image(base, target, size): libvirt_utils.copy_image(base, target) if size: # class Raw is misnamed, format may not be 'raw' in all cases use_cow = self.driver_format == 'qcow2' disk.extend(target, size, use_cow=use_cow)