vzstorage: fixed snapshot deletion in error state
If snap_info doesn't contain snapshot id we should not fail with KeyError. Closes-Bug: #1651817 Change-Id: I1086548e837e3ae78d5092048085f0b3f12f0c11 Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>
This commit is contained in:
Pavel Glushchak
parent
2ee3aa1d76
commit
c1b0c4d8b0
@ -314,3 +314,39 @@ class VZStorageTestCase(test.TestCase):
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drv._delete.assert_any_call(
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self._FAKE_VOLUME_PATH)
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drv._delete.assert_any_call(fake_vol_info)
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def test_delete_snapshot_ploop(self):
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fake_snap_info = {
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'active': self._FAKE_VOLUME_NAME,
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self._FAKE_SNAPSHOT_ID: self._FAKE_SNAPSHOT_PATH,
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}
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self._vz_driver.get_volume_format = mock.Mock(
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return_value=vzstorage.DISK_FORMAT_PLOOP)
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self._vz_driver._read_info_file = mock.Mock(
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return_value=fake_snap_info
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)
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self._vz_driver._get_desc_path = mock.Mock(
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return_value='%s/DiskDescriptor.xml' % self._FAKE_VOLUME_PATH
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)
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self._vz_driver.delete_snapshot(self.snap)
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self._vz_driver._execute.assert_called_once_with(
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'ploop', 'snapshot-delete', '-u',
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'{%s}' % self._FAKE_SNAPSHOT_ID,
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'%s/DiskDescriptor.xml' % self._FAKE_VOLUME_PATH,
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run_as_root=True
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)
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@mock.patch('cinder.volume.drivers.remotefs.RemoteFSSnapDriverBase.'
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'_delete_snapshot')
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def test_delete_snapshot_qcow2_invalid_snap_info(self,
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mock_delete_snapshot):
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fake_snap_info = {
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'active': self._FAKE_VOLUME_NAME,
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}
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self._vz_driver.get_volume_format = mock.Mock(
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return_value=vzstorage.DISK_FORMAT_QCOW2)
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self._vz_driver._read_info_file = mock.Mock(
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return_value=fake_snap_info
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)
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self._vz_driver.delete_snapshot(self.snap)
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self.assertFalse(mock_delete_snapshot.called)
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@ -27,7 +27,7 @@ from oslo_utils import imageutils
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from oslo_utils import units
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from cinder import exception
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from cinder.i18n import _, _LI
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from cinder.i18n import _, _LI, _LW
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from cinder.image import image_utils
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from cinder import interface
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from cinder import utils
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@ -184,6 +184,7 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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def _qemu_img_info(self, path, volume_name):
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qemu_img_cache = path + ".qemu_img_info"
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is_cache_outdated = True
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if os.path.isdir(path):
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# Ploop disks stored along with metadata xml as directories
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# qemu-img should explore base data file inside
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@ -191,8 +192,9 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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if os.path.isfile(qemu_img_cache):
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info_tm = os.stat(qemu_img_cache).st_mtime
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snap_tm = os.stat(path).st_mtime
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ret = None
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if not os.path.isfile(qemu_img_cache) or snap_tm > info_tm:
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if info_tm >= snap_tm:
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is_cache_outdated = False
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if is_cache_outdated:
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LOG.debug("Cached qemu-img info %s not present or outdated,"
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" refresh", qemu_img_cache)
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ret = super(VZStorageDriver, self)._qemu_img_info_base(
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@ -382,7 +384,7 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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if volume_format == DISK_FORMAT_PLOOP:
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self._create_ploop(volume_path, volume_size)
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elif volume_format == 'qcow2':
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elif volume_format == DISK_FORMAT_QCOW2:
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self._create_qcow2_file(volume_path, volume_size)
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elif self.configuration.vzstorage_sparsed_volumes:
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self._create_sparsed_file(volume_path, volume_size)
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@ -419,7 +421,6 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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'%dG' % size_gb,
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os.path.join(volume_path, 'DiskDescriptor.xml'),
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run_as_root=True)
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volume_path = os.path.join(volume_path, PLOOP_BASE_DELTA_NAME)
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else:
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image_utils.resize_image(volume_path, size_gb)
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if not self._is_file_size_equal(volume_path, size_gb):
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@ -578,7 +579,7 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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self._execute('ploop', 'snapshot-delete', '-u', '{%s}' % snapshot.id,
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self._get_desc_path(snapshot.volume),
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run_as_root=True)
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snap_info.pop(snapshot.id)
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snap_info.pop(snapshot.id, None)
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self._write_info_file(info_path, snap_info)
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@remotefs_drv.locked_volume_id_operation
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@ -597,15 +598,14 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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# Cache qemu-img info for created snapshot
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self._qemu_img_info(new_snap_path, snapshot.volume.name)
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@remotefs_drv.locked_volume_id_operation
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def delete_snapshot(self, snapshot):
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volume_format = self.get_volume_format(snapshot.volume)
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if volume_format == DISK_FORMAT_PLOOP:
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self._delete_snapshot_ploop(snapshot)
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return
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def _delete_snapshot_qcow2(self, snapshot):
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info_path = self._local_path_volume_info(snapshot.volume)
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snap_info = self._read_info_file(info_path, empty_if_missing=True)
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if snapshot.id not in snap_info:
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LOG.warning(_LW("Snapshot %s doesn't exist in snap_info"),
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snapshot.id)
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return
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snap_file = os.path.join(self._local_volume_dir(snapshot.volume),
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snap_info[snapshot.id])
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active_file = os.path.join(self._local_volume_dir(snapshot.volume),
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@ -622,7 +622,6 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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img_info = self._qemu_img_info(snap_file, snapshot.volume.name)
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base_file = os.path.join(self._local_volume_dir(snapshot.volume),
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img_info.backing_file)
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online = snapshot.volume.status == 'in-use'
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super(VZStorageDriver, self)._delete_snapshot(snapshot)
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@ -637,22 +636,29 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
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with open(info_dst, 'w') as fdw:
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json.dump(dst, fdw)
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if volume_format == "qcow2":
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if snap_file != active_file:
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# mv snap_file.info higher_file.info
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_update_backing_file(
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_qemu_info_cache(snap_file),
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_qemu_info_cache(higher_file))
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self._delete(_qemu_info_cache(snap_file))
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elif online:
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# mv base_file.info snap_file.info
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_update_backing_file(
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_qemu_info_cache(base_file),
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_qemu_info_cache(snap_file))
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self._delete(_qemu_info_cache(base_file))
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else:
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# rm snap_file.info
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self._delete(_qemu_info_cache(snap_file))
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if snap_file != active_file:
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# mv snap_file.info higher_file.info
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_update_backing_file(
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_qemu_info_cache(snap_file),
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_qemu_info_cache(higher_file))
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self._delete(_qemu_info_cache(snap_file))
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elif snapshot.volume.status == 'in-use':
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# mv base_file.info snap_file.info
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_update_backing_file(
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_qemu_info_cache(base_file),
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_qemu_info_cache(snap_file))
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self._delete(_qemu_info_cache(base_file))
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else:
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# rm snap_file.info
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self._delete(_qemu_info_cache(snap_file))
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@remotefs_drv.locked_volume_id_operation
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def delete_snapshot(self, snapshot):
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volume_format = self.get_volume_format(snapshot.volume)
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if volume_format == DISK_FORMAT_PLOOP:
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self._delete_snapshot_ploop(snapshot)
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else:
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self._delete_snapshot_qcow2(snapshot)
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def _copy_volume_to_image(self, context, volume, image_service,
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image_meta):
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