310 lines
14 KiB
Python
310 lines
14 KiB
Python
# Copyright 2015 IBM Corp.
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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 datetime
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import re
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from dateutil import parser as dateutil_parser
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from oslo_utils import fixture as osloutils_fixture
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from oslo_utils import timeutils
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import sqlalchemy as sa
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from sqlalchemy import func
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from nova import context
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from nova.db.main import api as db
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from nova import objects
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from nova.tests.functional import integrated_helpers
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from nova import utils as nova_utils
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class TestDatabaseArchive(integrated_helpers._IntegratedTestBase):
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"""Tests DB API for archiving (soft) deleted records"""
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def setUp(self):
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# Disable filters (namely the ComputeFilter) because we'll manipulate
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# time.
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self.flags(
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enabled_filters=['AllHostsFilter'], group='filter_scheduler')
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super(TestDatabaseArchive, self).setUp()
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self.enforce_fk_constraints()
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def test_archive_deleted_rows(self):
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# Boots a server, deletes it, and then tries to archive it.
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server = self._create_server()
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server_id = server['id']
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# Assert that there are instance_actions. instance_actions are
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# interesting since we don't soft delete them but they have a foreign
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# key back to the instances table.
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actions = self.api.get_instance_actions(server_id)
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self.assertTrue(len(actions),
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'No instance actions for server: %s' % server_id)
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self._delete_server(server)
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# Verify we have the soft deleted instance in the database.
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admin_context = context.get_admin_context(read_deleted='yes')
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# This will raise InstanceNotFound if it's not found.
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instance = db.instance_get_by_uuid(admin_context, server_id)
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# Make sure it's soft deleted.
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self.assertNotEqual(0, instance.deleted)
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# Verify we have some system_metadata since we'll check that later.
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self.assertTrue(len(instance.system_metadata),
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'No system_metadata for instance: %s' % server_id)
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# Now try and archive the soft deleted records.
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results, deleted_instance_uuids, archived = \
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db.archive_deleted_rows(max_rows=100)
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# verify system_metadata was dropped
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self.assertIn('instance_system_metadata', results)
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self.assertEqual(len(instance.system_metadata),
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results['instance_system_metadata'])
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# Verify that instances rows are dropped
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self.assertIn('instances', results)
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# Verify that instance_actions and actions_event are dropped
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# by the archive
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self.assertIn('instance_actions', results)
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self.assertIn('instance_actions_events', results)
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self.assertEqual(sum(results.values()), archived)
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def test_archive_deleted_rows_with_undeleted_residue(self):
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# Boots a server, deletes it, and then tries to archive it.
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server = self._create_server()
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server_id = server['id']
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# Assert that there are instance_actions. instance_actions are
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# interesting since we don't soft delete them but they have a foreign
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# key back to the instances table.
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actions = self.api.get_instance_actions(server_id)
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self.assertTrue(len(actions),
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'No instance actions for server: %s' % server_id)
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self._delete_server(server)
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# Verify we have the soft deleted instance in the database.
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admin_context = context.get_admin_context(read_deleted='yes')
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# This will raise InstanceNotFound if it's not found.
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instance = db.instance_get_by_uuid(admin_context, server_id)
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# Make sure it's soft deleted.
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self.assertNotEqual(0, instance.deleted)
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# Undelete the instance_extra record to make sure we delete it anyway
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extra = db.instance_extra_get_by_instance_uuid(admin_context,
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instance.uuid)
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self.assertNotEqual(0, extra.deleted)
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db.instance_extra_update_by_uuid(admin_context, instance.uuid,
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{'deleted': 0})
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extra = db.instance_extra_get_by_instance_uuid(admin_context,
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instance.uuid)
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self.assertEqual(0, extra.deleted)
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# Verify we have some system_metadata since we'll check that later.
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self.assertTrue(len(instance.system_metadata),
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'No system_metadata for instance: %s' % server_id)
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# Create a pci_devices record to simulate an instance that had a PCI
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# device allocated at the time it was deleted. There is a window of
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# time between deletion of the instance record and freeing of the PCI
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# device in nova-compute's _complete_deletion method during RT update.
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db.pci_device_update(admin_context, 1, 'fake-address',
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{'compute_node_id': 1,
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'address': 'fake-address',
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'vendor_id': 'fake',
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'product_id': 'fake',
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'dev_type': 'fake',
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'label': 'fake',
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'status': 'allocated',
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'instance_uuid': instance.uuid})
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# Now try and archive the soft deleted records.
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results, deleted_instance_uuids, archived = \
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db.archive_deleted_rows(max_rows=100)
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# verify system_metadata was dropped
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self.assertIn('instance_system_metadata', results)
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self.assertEqual(len(instance.system_metadata),
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results['instance_system_metadata'])
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# Verify that instances rows are dropped
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self.assertIn('instances', results)
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# Verify that instance_actions and actions_event are dropped
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# by the archive
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self.assertIn('instance_actions', results)
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self.assertIn('instance_actions_events', results)
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self.assertEqual(sum(results.values()), archived)
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# Verify that the pci_devices record has not been dropped
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self.assertNotIn('pci_devices', results)
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def test_archive_deleted_rows_incomplete(self):
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"""This tests a scenario where archive_deleted_rows is run with
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--max_rows and does not run to completion.
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That is, the archive is stopped before all archivable records have been
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archived. Specifically, the problematic state is when a single instance
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becomes partially archived (example: 'instance_extra' record for one
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instance has been archived while its 'instances' record remains). Any
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access of the instance (example: listing deleted instances) that
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triggers the retrieval of a dependent record that has been archived
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away, results in undefined behavior that may raise an error.
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We will force the system into a state where a single deleted instance
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is partially archived. We want to verify that we can, for example,
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successfully do a GET /servers/detail at any point between partial
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archive_deleted_rows runs without errors.
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"""
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# Boots a server, deletes it, and then tries to archive it.
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server = self._create_server()
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server_id = server['id']
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# Assert that there are instance_actions. instance_actions are
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# interesting since we don't soft delete them but they have a foreign
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# key back to the instances table.
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actions = self.api.get_instance_actions(server_id)
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self.assertTrue(len(actions),
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'No instance actions for server: %s' % server_id)
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self._delete_server(server)
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# Archive deleted records iteratively, 1 row at a time, and try to do a
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# GET /servers/detail between each run. All should succeed.
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exceptions = []
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while True:
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_, _, archived = db.archive_deleted_rows(max_rows=1)
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try:
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# Need to use the admin API to list deleted servers.
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self.admin_api.get_servers(search_opts={'deleted': True})
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except Exception as ex:
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exceptions.append(ex)
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if archived == 0:
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break
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self.assertFalse(exceptions)
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def _get_table_counts(self):
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engine = db.get_engine()
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conn = engine.connect()
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meta = sa.MetaData()
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meta.reflect(bind=engine)
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shadow_tables = db._purgeable_tables(meta)
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results = {}
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for table in shadow_tables:
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r = conn.execute(
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sa.select(func.count()).select_from(table)
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).fetchone()
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results[table.name] = r[0]
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return results
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def test_archive_then_purge_all(self):
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# Enable the generation of task_log records by the instance usage audit
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# nova-compute periodic task.
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self.flags(instance_usage_audit=True)
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compute = self.computes['compute']
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server = self._create_server()
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server_id = server['id']
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admin_context = context.get_admin_context()
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future = timeutils.utcnow() + datetime.timedelta(days=30)
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with osloutils_fixture.TimeFixture(future):
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# task_log records are generated by the _instance_usage_audit
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# periodic task.
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compute.manager._instance_usage_audit(admin_context)
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# Audit period defaults to 1 month, the last audit period will
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# be the previous calendar month.
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begin, end = nova_utils.last_completed_audit_period()
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# Verify that we have 1 task_log record per audit period.
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task_logs = objects.TaskLogList.get_all(
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admin_context, 'instance_usage_audit', begin, end)
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self.assertEqual(1, len(task_logs))
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self._delete_server(server)
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results, deleted_ids, archived = db.archive_deleted_rows(
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max_rows=1000, task_log=True)
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self.assertEqual([server_id], deleted_ids)
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lines = []
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def status(msg):
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lines.append(msg)
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deleted = db.purge_shadow_tables(admin_context, None, status_fn=status)
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self.assertNotEqual(0, deleted)
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self.assertNotEqual(0, len(lines))
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self.assertEqual(sum(results.values()), archived)
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for line in lines:
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self.assertIsNotNone(re.match(r'Deleted [1-9][0-9]* rows from .*',
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line))
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# Ensure we purged task_log records.
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self.assertIn('shadow_task_log', str(lines))
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results = self._get_table_counts()
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# No table should have any rows
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self.assertFalse(any(results.values()))
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def test_archive_then_purge_by_date(self):
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# Enable the generation of task_log records by the instance usage audit
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# nova-compute periodic task.
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self.flags(instance_usage_audit=True)
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compute = self.computes['compute']
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# Simulate a server that was created 30 days ago, needed to test the
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# task_log coverage. The task_log audit period defaults to 1 month, so
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# for a server to appear in the task_log, it must have been active
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# during the previous calendar month.
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month_ago = timeutils.utcnow() - datetime.timedelta(days=30)
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with osloutils_fixture.TimeFixture(month_ago):
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server = self._create_server()
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server_id = server['id']
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admin_context = context.get_admin_context()
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# task_log records are generated by the _instance_usage_audit
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# periodic task.
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compute.manager._instance_usage_audit(admin_context)
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# Audit period defaults to 1 month, the last audit period will
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# be the previous calendar month.
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begin, end = nova_utils.last_completed_audit_period()
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# Verify that we have 1 task_log record per audit period.
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task_logs = objects.TaskLogList.get_all(
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admin_context, 'instance_usage_audit', begin, end)
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self.assertEqual(1, len(task_logs))
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# Delete the server and archive deleted rows.
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self._delete_server(server)
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results, deleted_ids, archived = db.archive_deleted_rows(
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max_rows=1000, task_log=True)
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self.assertEqual([server_id], deleted_ids)
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self.assertEqual(sum(results.values()), archived)
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pre_purge_results = self._get_table_counts()
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# Make sure we didn't delete anything if the marker is before
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# we started
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past = timeutils.utcnow() - datetime.timedelta(days=31)
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deleted = db.purge_shadow_tables(admin_context, past)
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self.assertEqual(0, deleted)
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# Nothing should be changed if we didn't purge anything
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results = self._get_table_counts()
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self.assertEqual(pre_purge_results, results)
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# Make sure we deleted things when the marker is after
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# we started
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future = timeutils.utcnow() + datetime.timedelta(hours=1)
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deleted = db.purge_shadow_tables(admin_context, future)
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self.assertNotEqual(0, deleted)
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# There should be no rows in any table if we purged everything
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results = self._get_table_counts()
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self.assertFalse(any(results.values()))
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def test_purge_with_real_date(self):
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"""Make sure the result of dateutil's parser works with the
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query we're making to sqlalchemy.
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"""
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server = self._create_server()
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server_id = server['id']
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self._delete_server(server)
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results, deleted_ids, archived = db.archive_deleted_rows(max_rows=1000)
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self.assertEqual([server_id], deleted_ids)
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date = dateutil_parser.parse('oct 21 2015', fuzzy=True)
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admin_context = context.get_admin_context()
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deleted = db.purge_shadow_tables(admin_context, date)
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self.assertEqual(0, deleted)
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self.assertEqual(sum(results.values()), archived)
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