imageutils: allow passing subformat when converting
For some image formats (e.g. vhd, vhdx), qemu-img allows specifying image subformat options. This can be useful when requesting fixed size images. This change allows the imageutils convert function to accept an image subformat. This will be used by the SMBFS volume driver. Change-Id: I8706584e3abfb936072896d8c4902d82db32ab5f
This commit is contained in:
AlexMuresan
parent
3407100f94
commit
4cfc201b72
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@ -116,6 +116,38 @@ def get_qemu_img_version():
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return _get_version_from_string(version.groups()[0])
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def _get_qemu_convert_cmd(src, dest, out_format, src_format=None,
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out_subformat=None, cache_mode=None,
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prefix=None):
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if out_format == 'vhd':
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# qemu-img still uses the legacy vpc name
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out_format == 'vpc'
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cmd = ['qemu-img', 'convert', '-O', out_format]
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if prefix:
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cmd = list(prefix) + cmd
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if cache_mode:
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cmd += ('-t', cache_mode)
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if out_subformat:
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cmd += ('-o', 'subformat=%s' % out_subformat)
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# AMI images can be raw or qcow2 but qemu-img doesn't accept "ami" as
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# an image format, so we use automatic detection.
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# TODO(geguileo): This fixes unencrypted AMI image case, but we need to
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# fix the encrypted case.
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if (src_format or '').lower() not in ('', 'ami'):
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cmd += ('-f', src_format) # prevent detection of format
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cmd += [src, dest]
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return cmd
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def _get_version_from_string(version_string):
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return [int(x) for x in version_string.split('.')]
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@ -138,12 +170,10 @@ def check_qemu_img_version(minimum_version):
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def _convert_image(prefix, source, dest, out_format,
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src_format=None, run_as_root=True):
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out_subformat=None, src_format=None,
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run_as_root=True):
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"""Convert image to other format."""
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cmd = prefix + ('qemu-img', 'convert',
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'-O', out_format, source, dest)
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# Check whether O_DIRECT is supported and set '-t none' if it is
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# This is needed to ensure that all data hit the device before
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# it gets unmapped remotely from the host for some backends
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@ -157,17 +187,17 @@ def _convert_image(prefix, source, dest, out_format,
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volume_utils.check_for_odirect_support(source,
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dest,
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'oflag=direct')):
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cmd = prefix + ('qemu-img', 'convert',
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'-t', 'none')
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cache_mode = 'none'
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else:
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# use default
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cache_mode = None
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# AMI images can be raw or qcow2 but qemu-img doesn't accept "ami" as
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# an image format, so we use automatic detection.
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# TODO(geguileo): This fixes unencrypted AMI image case, but we need to
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# fix the encrypted case.
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if (src_format or '').lower() not in ('', 'ami'):
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cmd += ('-f', src_format) # prevent detection of format
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cmd += ('-O', out_format, source, dest)
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cmd = _get_qemu_convert_cmd(source, dest,
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out_format=out_format,
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src_format=src_format,
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out_subformat=out_subformat,
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cache_mode=cache_mode,
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prefix=prefix)
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start_time = timeutils.utcnow()
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utils.execute(*cmd, run_as_root=run_as_root)
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@ -201,14 +231,15 @@ def _convert_image(prefix, source, dest, out_format,
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LOG.info(msg, {"sz": fsz_mb, "mbps": mbps})
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def convert_image(source, dest, out_format, src_format=None,
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run_as_root=True, throttle=None):
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def convert_image(source, dest, out_format, out_subformat=None,
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src_format=None, run_as_root=True, throttle=None):
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if not throttle:
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throttle = throttling.Throttle.get_default()
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with throttle.subcommand(source, dest) as throttle_cmd:
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_convert_image(tuple(throttle_cmd['prefix']),
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source, dest,
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out_format,
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out_subformat=out_subformat,
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src_format=src_format,
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run_as_root=run_as_root)
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@ -349,8 +380,8 @@ def fetch_to_raw(context, image_service,
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def fetch_to_volume_format(context, image_service,
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image_id, dest, volume_format, blocksize,
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user_id=None, project_id=None, size=None,
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run_as_root=True):
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volume_subformat=None, user_id=None,
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project_id=None, size=None, run_as_root=True):
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qemu_img = True
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image_meta = image_service.show(context, image_id)
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@ -430,6 +461,7 @@ def fetch_to_volume_format(context, image_service,
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disk_format = fixup_disk_format(image_meta['disk_format'])
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convert_image(tmp, dest, volume_format,
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out_subformat=volume_subformat,
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src_format=disk_format,
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run_as_root=run_as_root)
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@ -1,4 +1,3 @@
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# Copyright (c) 2013 eNovance , Inc.
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# All Rights Reserved.
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#
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@ -140,7 +139,7 @@ class TestConvertImage(test.TestCase):
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self.assertIsNone(output)
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mock_exec.assert_called_once_with('cgcmd', 'qemu-img', 'convert',
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'-t', 'none', '-O', out_format,
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'-O', out_format, '-t', 'none',
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source, dest, run_as_root=True)
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mock_exec.reset_mock()
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@ -174,7 +173,7 @@ class TestConvertImage(test.TestCase):
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mock_info.assert_called_once_with(source, run_as_root=True)
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self.assertIsNone(output)
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mock_exec.assert_called_once_with('cgcmd', 'qemu-img', 'convert',
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'-t', 'none', '-O', out_format,
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'-O', out_format, '-t', 'none',
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source, dest, run_as_root=True)
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mock_exec.reset_mock()
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@ -200,13 +199,17 @@ class TestConvertImage(test.TestCase):
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source = mock.sentinel.source
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dest = mock.sentinel.dest
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out_format = mock.sentinel.out_format
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out_subformat = 'fake_subformat'
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mock_info.return_value.virtual_size = 1048576
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output = image_utils.convert_image(source, dest, out_format)
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output = image_utils.convert_image(source, dest, out_format,
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out_subformat=out_subformat)
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self.assertIsNone(output)
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mock_exec.assert_called_once_with('qemu-img', 'convert', '-O',
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out_format, source, dest,
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out_format, '-o',
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'subformat=%s' % out_subformat,
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source, dest,
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run_as_root=True)
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@mock.patch('cinder.volume.utils.check_for_odirect_support',
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@ -222,13 +225,17 @@ class TestConvertImage(test.TestCase):
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source = mock.sentinel.source
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dest = mock.sentinel.dest
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out_format = mock.sentinel.out_format
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out_subformat = 'fake_subformat'
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mock_info.side_effect = ValueError
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output = image_utils.convert_image(source, dest, out_format)
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output = image_utils.convert_image(source, dest, out_format,
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out_subformat=out_subformat)
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self.assertIsNone(output)
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mock_exec.assert_called_once_with('qemu-img', 'convert', '-O',
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out_format, source, dest,
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out_format, '-o',
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'subformat=%s' % out_subformat,
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source, dest,
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run_as_root=True)
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@mock.patch('cinder.image.image_utils.qemu_img_info')
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@ -248,7 +255,7 @@ class TestConvertImage(test.TestCase):
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self.assertIsNone(output)
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mock_exec.assert_called_once_with('qemu-img', 'convert',
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'-t', 'none', '-O', out_format,
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'-O', out_format, '-t', 'none',
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source, dest, run_as_root=True)
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@ -708,6 +715,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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image_id = mock.sentinel.image_id
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dest = mock.sentinel.dest
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volume_format = mock.sentinel.volume_format
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out_subformat = None
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blocksize = mock.sentinel.blocksize
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data = mock_info.return_value
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@ -730,6 +738,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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self.assertFalse(mock_repl_xen.called)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=out_subformat,
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run_as_root=True,
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src_format='raw')
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@ -752,6 +761,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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image_id = mock.sentinel.image_id
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dest = mock.sentinel.dest
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volume_format = mock.sentinel.volume_format
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out_subformat = None
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blocksize = mock.sentinel.blocksize
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ctxt.user_id = user_id = mock.sentinel.user_id
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project_id = mock.sentinel.project_id
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@ -779,6 +789,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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self.assertFalse(mock_repl_xen.called)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=out_subformat,
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run_as_root=run_as_root,
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src_format='raw')
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@ -800,6 +811,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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image_id = mock.sentinel.image_id
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dest = mock.sentinel.dest
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volume_format = mock.sentinel.volume_format
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out_subformat = None
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blocksize = mock.sentinel.blocksize
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ctxt.user_id = user_id = mock.sentinel.user_id
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project_id = mock.sentinel.project_id
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@ -829,6 +841,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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mock_repl_xen.assert_called_once_with(tmp)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=out_subformat,
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run_as_root=run_as_root,
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src_format=expect_format)
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@ -848,6 +861,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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image_id = mock.sentinel.image_id
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dest = mock.sentinel.dest
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volume_format = mock.sentinel.volume_format
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out_subformat = None
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blocksize = mock.sentinel.blocksize
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ctxt.user_id = user_id = mock.sentinel.user_id
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project_id = mock.sentinel.project_id
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@ -876,6 +890,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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tmp, user_id, project_id)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=out_subformat,
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run_as_root=run_as_root,
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src_format=expect_format)
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@ -900,6 +915,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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image_id = mock.sentinel.image_id
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dest = mock.sentinel.dest
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volume_format = mock.sentinel.volume_format
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out_subformat = None
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blocksize = mock.sentinel.blocksize
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data = mock_info.return_value
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@ -929,6 +945,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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self.assertFalse(mock_repl_xen.called)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=out_subformat,
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run_as_root=True,
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src_format='raw')
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@ -1298,6 +1315,7 @@ class TestFetchToVolumeFormat(test.TestCase):
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mock_repl_xen.assert_called_once_with(tmp)
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self.assertFalse(mock_copy.called)
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mock_convert.assert_called_once_with(tmp, dest, volume_format,
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out_subformat=None,
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run_as_root=run_as_root,
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src_format='raw')
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