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Run a python-based test to revert a filesystem
Signed-off-by: mulhern <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| # Copyright 2021 Red Hat, Inc. | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
|
||
| """ | ||
| Test reverting a filesystem. | ||
| """ | ||
|
|
||
| # isort: STDLIB | ||
| import os | ||
| import tempfile | ||
|
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||
| # isort: THIRDPARTY | ||
| import libmount | ||
| from justbytes import Range | ||
|
|
||
| # isort: LOCAL | ||
| from stratisd_client_dbus import Filesystem | ||
|
|
||
| from ._utils import ( | ||
| Pool, | ||
| ServiceContextManager, | ||
| UdevTest, | ||
| create_pool, | ||
| get_object, | ||
| random_string, | ||
| ) | ||
|
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||
|
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| class TestRevert(UdevTest): | ||
| """ | ||
| Test reverting a filesystem. | ||
| """ | ||
|
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| def test_revert(self): # pylint: disable=too-many-locals | ||
| """ | ||
| Schedule a revert and verify that it has succeeded when the pool is | ||
| restarted. | ||
| """ | ||
| mountdir = tempfile.mkdtemp("_stratis_mnt") | ||
|
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||
| with ServiceContextManager(): | ||
| device_tokens = self._lb_mgr.create_devices(2) | ||
|
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| pool_name = random_string(5) | ||
|
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| (_, (pool_object_path, _)) = create_pool( | ||
| pool_name, self._lb_mgr.device_files(device_tokens) | ||
| ) | ||
|
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| fs_name = "fs1" | ||
| fs_size = Range(1024**3) | ||
| ((_, fs_object_paths), return_code, message) = ( | ||
| Pool.Methods.CreateFilesystems( | ||
| get_object(pool_object_path), | ||
| {"specs": [(fs_name, str(fs_size.magnitude), (False, ""))]}, | ||
| ) | ||
| ) | ||
|
|
||
| if return_code != 0: | ||
| raise RuntimeError( | ||
| f"Failed to create a requested filesystem: {message}" | ||
| ) | ||
|
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| filepath = f"/dev/stratis/{pool_name}/{fs_name}" | ||
|
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| mountcxt = libmount.Context( # pylint: disable=no-member | ||
| target=mountdir, source=filepath | ||
| ) | ||
| mountcxt.mount() | ||
|
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| file1 = "file1.txt" | ||
| with open(os.path.join(mountdir, file1), encoding="utf-8", mode="w") as fd: | ||
| print(file1, file=fd) | ||
|
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||
| snap_name = "snap1" | ||
| ((_, snap_object_path), return_code, message) = ( | ||
| Pool.Methods.SnapshotFilesystem( | ||
| get_object(pool_object_path), | ||
| {"origin": fs_object_paths[0], "snapshot_name": snap_name}, | ||
| ) | ||
| ) | ||
|
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| file2 = "file2.txt" | ||
| with open(os.path.join(mountdir, file2), encoding="utf-8", mode="w") as fd: | ||
| print(file2, file=fd) | ||
|
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| Filesystem.Properties.MergeScheduled.set(get_object(snap_object_path), True) | ||
| mountcxt.umount() | ||
|
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| self.assertTrue(os.path.exists(f"/dev/stratis/{pool_name}/{snap_name}")) | ||
|
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| with ServiceContextManager(): | ||
| self.wait_for_pools(1) | ||
|
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| mountcxt = libmount.Context( # pylint: disable=no-member | ||
| target=mountdir, source=filepath | ||
| ) | ||
| mountcxt.mount() | ||
|
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| with open(os.path.join(mountdir, file1), encoding="utf-8") as fd: | ||
| self.assertEqual(fd.read(), file1) | ||
|
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| with self.assertRaises(FileNotFoundError): | ||
| # pylint: disable=consider-using-with | ||
| open(os.path.join(mountdir, file2), encoding="utf-8") | ||
|
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| mountcxt.umount() | ||
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| self.assertFalse(os.path.exists(f"/dev/stratis/{pool_name}/{snap_name}")) |