Add Tempest tests to validate checksum usage
This adds 2 new Tempest tests that verify checksum usage during backup and restore. The first test, `test_freezer_fs_backup_valid_checksum`, ensures that both backup and restore complete correctly with checksum computation and validation enabled. The second test, `test_freezer_fs_backup_bad_checksum`, verifies correct error behavior when attempting to restore a backup with an invalid checksum. Change-Id: I8a0a70bbe0c87c8f1ea1c8e013c443cac62cfc1e
This commit is contained in:
Tim Buckley
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694c98e063
commit
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# (C) Copyright 2016 Hewlett Packard Enterprise Development Company LP
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json
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import os
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import subprocess
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from freezer.tests.freezer_tempest_plugin.tests.api import base
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from freezer.tests.integration.common import Temp_Tree
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from tempest import test
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class TestFreezerMetadataChecksum(base.BaseFreezerTest):
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def __init__(self, *args, **kwargs):
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super(TestFreezerMetadataChecksum, self).__init__(*args, **kwargs)
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# noinspection PyAttributeOutsideInit
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def setUp(self):
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super(TestFreezerMetadataChecksum, self).setUp()
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# create a source tree to backup with a few empty files
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# (files must be empty to avoid encoding errors with pure random data)
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self.source_tree = Temp_Tree()
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self.source_tree.add_random_data(size=0)
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self.storage_tree = Temp_Tree()
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self.dest_tree = Temp_Tree()
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self.freezer_backup_name = 'freezer-test-backup-checksum-0'
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self.metadata_out = os.path.join(
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self.storage_tree.path,
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self.freezer_backup_name + '.json')
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self.environ = super(TestFreezerMetadataChecksum, self).get_environ()
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def tearDown(self):
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super(TestFreezerMetadataChecksum, self).tearDown()
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self.source_tree.cleanup()
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self.dest_tree.cleanup()
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self.storage_tree.cleanup()
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@test.attr(type="gate")
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def test_freezer_fs_backup_valid_checksum(self):
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# perform a normal backup, but enable consistency checks and save the
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# metadata to disk
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backup_args = ['freezer-agent',
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'--path-to-backup',
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self.source_tree.path,
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'--container',
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self.storage_tree.path,
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'--backup-name',
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self.freezer_backup_name,
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'--storage',
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'local',
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'--consistency_check',
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'--metadata-out',
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self.metadata_out]
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self.run_subprocess(backup_args, 'Test backup to local storage.')
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# load the stored metadata to retrieve the computed checksum
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with open(self.metadata_out) as f:
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metadata = json.load(f)
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self.assertIn('consistency_checksum', metadata,
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'Checksum must exist in stored metadata.')
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checksum = metadata['consistency_checksum']
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restore_args = ['freezer-agent',
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'--action',
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'restore',
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'--restore-abs-path',
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self.dest_tree.path,
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'--container',
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self.storage_tree.path,
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'--backup-name',
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self.freezer_backup_name,
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'--storage',
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'local',
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'--consistency_checksum',
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checksum]
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self.run_subprocess(restore_args,
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'Test restore from local storage with '
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'computed checksum.')
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@test.attr(type="gate")
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def test_freezer_fs_backup_bad_checksum(self):
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# as above, but we'll ignore the computed checksum
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backup_args = ['freezer-agent',
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'--path-to-backup',
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self.source_tree.path,
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'--container',
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self.storage_tree.path,
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'--backup-name',
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self.freezer_backup_name,
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'--storage',
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'local',
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'--consistency_check',
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'--metadata-out',
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self.metadata_out]
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self.run_subprocess(backup_args, 'Test backup to local storage.')
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# make a failing sha256 checksum (assuming no added path string)
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bad_checksum = '0' * 64
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# attempt to restore using the bad checksum
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restore_args = ['freezer-agent',
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'--action',
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'restore',
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'--restore-abs-path',
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self.dest_tree.path,
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'--container',
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self.storage_tree.path,
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'--backup-name',
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self.freezer_backup_name,
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'--storage',
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'local',
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'--consistency_checksum',
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bad_checksum]
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process = subprocess.Popen(restore_args,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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env=self.environ, shell=False)
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out, err = process.communicate()
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# make sure the subprocess exist with an error due to checksum mismatch
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message = '{0} Output: {1} Error: {2}'.format(
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'Restore process should fail with checksum error.',
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out, err)
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self.assertEqual(1, process.returncode, message)
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self.assertEqual('', out, message)
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self.assertNotEqual('', err, message)
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