555 lines
25 KiB
Python
555 lines
25 KiB
Python
#!/usr/bin/python -u
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from hashlib import md5
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import time
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import uuid
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import random
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import unittest
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from swift.common.manager import Manager
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from swift.common.internal_client import InternalClient
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from swift.common import utils, direct_client
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from swift.common.storage_policy import POLICIES
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from swift.common.http import HTTP_NOT_FOUND
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from test.probe.brain import BrainSplitter
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from test.probe.common import (ReplProbeTest, ENABLED_POLICIES,
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POLICIES_BY_TYPE, REPL_POLICY)
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from swiftclient import client, ClientException
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TIMEOUT = 60
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class TestContainerMergePolicyIndex(ReplProbeTest):
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@unittest.skipIf(len(ENABLED_POLICIES) < 2, "Need more than one policy")
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def setUp(self):
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super(TestContainerMergePolicyIndex, self).setUp()
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self.container_name = 'container-%s' % uuid.uuid4()
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self.object_name = 'object-%s' % uuid.uuid4()
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self.brain = BrainSplitter(self.url, self.token, self.container_name,
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self.object_name, 'container')
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def _get_object_patiently(self, policy_index):
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# use proxy to access object (bad container info might be cached...)
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timeout = time.time() + TIMEOUT
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while time.time() < timeout:
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try:
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return client.get_object(self.url, self.token,
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self.container_name,
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self.object_name)
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except ClientException as err:
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if err.http_status != HTTP_NOT_FOUND:
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raise
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time.sleep(1)
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else:
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self.fail('could not HEAD /%s/%s/%s/ from policy %s '
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'after %s seconds.' % (
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self.account, self.container_name, self.object_name,
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int(policy_index), TIMEOUT))
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def test_merge_storage_policy_index(self):
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# generic split brain
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self.brain.stop_primary_half()
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self.brain.put_container()
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self.brain.start_primary_half()
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self.brain.stop_handoff_half()
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self.brain.put_container()
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self.brain.put_object(headers={'x-object-meta-test': 'custom-meta'},
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contents='VERIFY')
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self.brain.start_handoff_half()
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# make sure we have some manner of split brain
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container_part, container_nodes = self.container_ring.get_nodes(
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self.account, self.container_name)
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head_responses = []
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for node in container_nodes:
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metadata = direct_client.direct_head_container(
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node, container_part, self.account, self.container_name)
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head_responses.append((node, metadata))
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found_policy_indexes = \
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set(metadata['X-Backend-Storage-Policy-Index'] for
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node, metadata in head_responses)
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self.assertGreater(
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len(found_policy_indexes), 1,
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'primary nodes did not disagree about policy index %r' %
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head_responses)
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# find our object
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orig_policy_index = None
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for policy_index in found_policy_indexes:
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object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, self.object_name)
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for node in nodes:
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try:
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direct_client.direct_head_object(
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node, part, self.account, self.container_name,
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self.object_name,
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headers={'X-Backend-Storage-Policy-Index':
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policy_index})
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except direct_client.ClientException as err:
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continue
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orig_policy_index = policy_index
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break
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if orig_policy_index is not None:
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break
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else:
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self.fail('Unable to find /%s/%s/%s in %r' % (
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self.account, self.container_name, self.object_name,
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found_policy_indexes))
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self.get_to_final_state()
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Manager(['container-reconciler']).once()
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# validate containers
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head_responses = []
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for node in container_nodes:
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metadata = direct_client.direct_head_container(
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node, container_part, self.account, self.container_name)
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head_responses.append((node, metadata))
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found_policy_indexes = \
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set(metadata['X-Backend-Storage-Policy-Index'] for
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node, metadata in head_responses)
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self.assertEqual(len(found_policy_indexes), 1,
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'primary nodes disagree about policy index %r' %
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head_responses)
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expected_policy_index = found_policy_indexes.pop()
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self.assertNotEqual(orig_policy_index, expected_policy_index)
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# validate object placement
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orig_policy_ring = POLICIES.get_object_ring(orig_policy_index,
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'/etc/swift')
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for node in orig_policy_ring.devs:
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try:
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direct_client.direct_head_object(
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node, part, self.account, self.container_name,
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self.object_name, headers={
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'X-Backend-Storage-Policy-Index': orig_policy_index})
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except direct_client.ClientException as err:
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if err.http_status == HTTP_NOT_FOUND:
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continue
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raise
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else:
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self.fail('Found /%s/%s/%s in %s' % (
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self.account, self.container_name, self.object_name,
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orig_policy_index))
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# verify that the object data read by external client is correct
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headers, data = self._get_object_patiently(expected_policy_index)
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self.assertEqual('VERIFY', data)
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self.assertEqual('custom-meta', headers['x-object-meta-test'])
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def test_reconcile_delete(self):
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# generic split brain
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self.brain.stop_primary_half()
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self.brain.put_container()
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self.brain.put_object()
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self.brain.start_primary_half()
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self.brain.stop_handoff_half()
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self.brain.put_container()
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self.brain.delete_object()
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self.brain.start_handoff_half()
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# make sure we have some manner of split brain
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container_part, container_nodes = self.container_ring.get_nodes(
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self.account, self.container_name)
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head_responses = []
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for node in container_nodes:
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metadata = direct_client.direct_head_container(
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node, container_part, self.account, self.container_name)
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head_responses.append((node, metadata))
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found_policy_indexes = \
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set(metadata['X-Backend-Storage-Policy-Index'] for
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node, metadata in head_responses)
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self.assertGreater(
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len(found_policy_indexes), 1,
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'primary nodes did not disagree about policy index %r' %
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head_responses)
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# find our object
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orig_policy_index = ts_policy_index = None
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for policy_index in found_policy_indexes:
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object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, self.object_name)
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for node in nodes:
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try:
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direct_client.direct_head_object(
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node, part, self.account, self.container_name,
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self.object_name,
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headers={'X-Backend-Storage-Policy-Index':
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policy_index})
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except direct_client.ClientException as err:
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if 'x-backend-timestamp' in err.http_headers:
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ts_policy_index = policy_index
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break
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else:
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orig_policy_index = policy_index
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break
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if not orig_policy_index:
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self.fail('Unable to find /%s/%s/%s in %r' % (
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self.account, self.container_name, self.object_name,
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found_policy_indexes))
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if not ts_policy_index:
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self.fail('Unable to find tombstone /%s/%s/%s in %r' % (
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self.account, self.container_name, self.object_name,
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found_policy_indexes))
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self.get_to_final_state()
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Manager(['container-reconciler']).once()
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# validate containers
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head_responses = []
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for node in container_nodes:
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metadata = direct_client.direct_head_container(
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node, container_part, self.account, self.container_name)
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head_responses.append((node, metadata))
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new_found_policy_indexes = \
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set(metadata['X-Backend-Storage-Policy-Index'] for node,
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metadata in head_responses)
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self.assertEqual(len(new_found_policy_indexes), 1,
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'primary nodes disagree about policy index %r' %
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dict((node['port'],
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metadata['X-Backend-Storage-Policy-Index'])
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for node, metadata in head_responses))
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expected_policy_index = new_found_policy_indexes.pop()
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self.assertEqual(orig_policy_index, expected_policy_index)
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# validate object fully deleted
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for policy_index in found_policy_indexes:
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object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, self.object_name)
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for node in nodes:
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try:
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direct_client.direct_head_object(
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node, part, self.account, self.container_name,
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self.object_name,
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headers={'X-Backend-Storage-Policy-Index':
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policy_index})
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except direct_client.ClientException as err:
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if err.http_status == HTTP_NOT_FOUND:
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continue
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else:
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self.fail('Found /%s/%s/%s in %s on %s' % (
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self.account, self.container_name, self.object_name,
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orig_policy_index, node))
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def test_reconcile_manifest(self):
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if 'slo' not in self.cluster_info:
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raise unittest.SkipTest(
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"SLO not enabled in proxy; can't test manifest reconciliation")
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# this test is not only testing a split brain scenario on
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# multiple policies with mis-placed objects - it even writes out
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# a static large object directly to the storage nodes while the
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# objects are unavailably mis-placed from *behind* the proxy and
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# doesn't know how to do that for EC_POLICY (clayg: why did you
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# guys let me write a test that does this!?) - so we force
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# wrong_policy (where the manifest gets written) to be one of
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# any of your configured REPL_POLICY (we know you have one
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# because this is a ReplProbeTest)
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wrong_policy = random.choice(POLICIES_BY_TYPE[REPL_POLICY])
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policy = random.choice([p for p in ENABLED_POLICIES
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if p is not wrong_policy])
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manifest_data = []
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def write_part(i):
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body = 'VERIFY%0.2d' % i + '\x00' * 1048576
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part_name = 'manifest_part_%0.2d' % i
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manifest_entry = {
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"path": "/%s/%s" % (self.container_name, part_name),
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"etag": md5(body).hexdigest(),
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"size_bytes": len(body),
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}
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client.put_object(self.url, self.token, self.container_name,
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part_name, contents=body)
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manifest_data.append(manifest_entry)
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# get an old container stashed
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self.brain.stop_primary_half()
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self.brain.put_container(int(policy))
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self.brain.start_primary_half()
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# write some parts
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for i in range(10):
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write_part(i)
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self.brain.stop_handoff_half()
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self.brain.put_container(int(wrong_policy))
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# write some more parts
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for i in range(10, 20):
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write_part(i)
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# write manifest
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with self.assertRaises(ClientException) as catcher:
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client.put_object(self.url, self.token, self.container_name,
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self.object_name,
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contents=utils.json.dumps(manifest_data),
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query_string='multipart-manifest=put')
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# so as it works out, you can't really upload a multi-part
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# manifest for objects that are currently misplaced - you have to
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# wait until they're all available - which is about the same as
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# some other failure that causes data to be unavailable to the
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# proxy at the time of upload
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self.assertEqual(catcher.exception.http_status, 400)
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# but what the heck, we'll sneak one in just to see what happens...
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direct_manifest_name = self.object_name + '-direct-test'
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object_ring = POLICIES.get_object_ring(wrong_policy.idx, '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, direct_manifest_name)
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container_part = self.container_ring.get_part(self.account,
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self.container_name)
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def translate_direct(data):
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return {
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'hash': data['etag'],
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'bytes': data['size_bytes'],
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'name': data['path'],
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}
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direct_manifest_data = map(translate_direct, manifest_data)
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headers = {
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'x-container-host': ','.join('%s:%s' % (n['ip'], n['port']) for n
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in self.container_ring.devs),
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'x-container-device': ','.join(n['device'] for n in
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self.container_ring.devs),
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'x-container-partition': container_part,
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'X-Backend-Storage-Policy-Index': wrong_policy.idx,
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'X-Static-Large-Object': 'True',
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}
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for node in nodes:
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direct_client.direct_put_object(
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node, part, self.account, self.container_name,
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direct_manifest_name,
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contents=utils.json.dumps(direct_manifest_data),
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headers=headers)
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break # one should do it...
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self.brain.start_handoff_half()
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self.get_to_final_state()
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Manager(['container-reconciler']).once()
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# clear proxy cache
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client.post_container(self.url, self.token, self.container_name, {})
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# let's see how that direct upload worked out...
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metadata, body = client.get_object(
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self.url, self.token, self.container_name, direct_manifest_name,
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query_string='multipart-manifest=get')
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self.assertEqual(metadata['x-static-large-object'].lower(), 'true')
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for i, entry in enumerate(utils.json.loads(body)):
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for key in ('hash', 'bytes', 'name'):
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self.assertEqual(entry[key], direct_manifest_data[i][key])
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metadata, body = client.get_object(
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self.url, self.token, self.container_name, direct_manifest_name)
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self.assertEqual(metadata['x-static-large-object'].lower(), 'true')
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self.assertEqual(int(metadata['content-length']),
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sum(part['size_bytes'] for part in manifest_data))
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self.assertEqual(body, ''.join('VERIFY%0.2d' % i + '\x00' * 1048576
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for i in range(20)))
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# and regular upload should work now too
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client.put_object(self.url, self.token, self.container_name,
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self.object_name,
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contents=utils.json.dumps(manifest_data),
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query_string='multipart-manifest=put')
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metadata = client.head_object(self.url, self.token,
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self.container_name,
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self.object_name)
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self.assertEqual(int(metadata['content-length']),
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sum(part['size_bytes'] for part in manifest_data))
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def test_reconcile_symlink(self):
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if 'symlink' not in self.cluster_info:
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raise unittest.SkipTest(
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"Symlink not enabled in proxy; can't test "
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"symlink reconciliation")
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wrong_policy = random.choice(ENABLED_POLICIES)
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policy = random.choice([p for p in ENABLED_POLICIES
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if p is not wrong_policy])
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# get an old container stashed
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self.brain.stop_primary_half()
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self.brain.put_container(int(policy))
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self.brain.start_primary_half()
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# write some target data
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client.put_object(self.url, self.token, self.container_name, 'target',
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contents='this is the target data')
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# write the symlink
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self.brain.stop_handoff_half()
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self.brain.put_container(int(wrong_policy))
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client.put_object(
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self.url, self.token, self.container_name, 'symlink',
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headers={
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'X-Symlink-Target': '%s/target' % self.container_name,
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'Content-Type': 'application/symlink',
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})
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# at this point we have a broken symlink (the container_info has the
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# proxy looking for the target in the wrong policy)
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with self.assertRaises(ClientException) as ctx:
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client.get_object(self.url, self.token, self.container_name,
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'symlink')
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self.assertEqual(ctx.exception.http_status, 404)
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# of course the symlink itself is fine
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metadata, body = client.get_object(self.url, self.token,
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self.container_name, 'symlink',
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query_string='symlink=get')
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self.assertEqual(metadata['x-symlink-target'],
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'%s/target' % self.container_name)
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self.assertEqual(metadata['content-type'], 'application/symlink')
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self.assertEqual(body, '')
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# ... although in the wrong policy
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object_ring = POLICIES.get_object_ring(int(wrong_policy), '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, 'symlink')
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for node in nodes:
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metadata = direct_client.direct_head_object(
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node, part, self.account, self.container_name, 'symlink',
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headers={'X-Backend-Storage-Policy-Index': int(wrong_policy)})
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self.assertEqual(metadata['X-Object-Sysmeta-Symlink-Target'],
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'%s/target' % self.container_name)
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# let the reconciler run
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self.brain.start_handoff_half()
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self.get_to_final_state()
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Manager(['container-reconciler']).once()
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# clear proxy cache
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client.post_container(self.url, self.token, self.container_name, {})
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# now the symlink works
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metadata, body = client.get_object(self.url, self.token,
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self.container_name, 'symlink')
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self.assertEqual(body, 'this is the target data')
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# and it's in the correct policy
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object_ring = POLICIES.get_object_ring(int(policy), '/etc/swift')
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part, nodes = object_ring.get_nodes(
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self.account, self.container_name, 'symlink')
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for node in nodes:
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metadata = direct_client.direct_head_object(
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node, part, self.account, self.container_name, 'symlink',
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headers={'X-Backend-Storage-Policy-Index': int(policy)})
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self.assertEqual(metadata['X-Object-Sysmeta-Symlink-Target'],
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'%s/target' % self.container_name)
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def test_reconciler_move_object_twice(self):
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# select some policies
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old_policy = random.choice(ENABLED_POLICIES)
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new_policy = random.choice([p for p in ENABLED_POLICIES
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if p != old_policy])
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# setup a split brain
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self.brain.stop_handoff_half()
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# get old_policy on two primaries
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self.brain.put_container(policy_index=int(old_policy))
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self.brain.start_handoff_half()
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self.brain.stop_primary_half()
|
|
# force a recreate on handoffs
|
|
self.brain.put_container(policy_index=int(old_policy))
|
|
self.brain.delete_container()
|
|
self.brain.put_container(policy_index=int(new_policy))
|
|
self.brain.put_object() # populate memcache with new_policy
|
|
self.brain.start_primary_half()
|
|
|
|
# at this point two primaries have old policy
|
|
container_part, container_nodes = self.container_ring.get_nodes(
|
|
self.account, self.container_name)
|
|
head_responses = [
|
|
(node, direct_client.direct_head_container(
|
|
node, container_part, self.account, self.container_name))
|
|
for node in container_nodes]
|
|
old_container_nodes = [
|
|
node for node, metadata in head_responses
|
|
if int(old_policy) ==
|
|
int(metadata['X-Backend-Storage-Policy-Index'])]
|
|
self.assertEqual(2, len(old_container_nodes))
|
|
|
|
# hopefully memcache still has the new policy cached
|
|
self.brain.put_object(headers={'x-object-meta-test': 'custom-meta'},
|
|
contents='VERIFY')
|
|
# double-check object correctly written to new policy
|
|
conf_files = []
|
|
for server in Manager(['container-reconciler']).servers:
|
|
conf_files.extend(server.conf_files())
|
|
conf_file = conf_files[0]
|
|
int_client = InternalClient(conf_file, 'probe-test', 3)
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
acceptable_statuses=(4,),
|
|
headers={'X-Backend-Storage-Policy-Index': int(old_policy)})
|
|
|
|
# shutdown the containers that know about the new policy
|
|
self.brain.stop_handoff_half()
|
|
|
|
# and get rows enqueued from old nodes
|
|
for server_type in ('container-replicator', 'container-updater'):
|
|
server = Manager([server_type])
|
|
for node in old_container_nodes:
|
|
server.once(number=self.config_number(node))
|
|
|
|
# verify entry in the queue for the "misplaced" new_policy
|
|
for container in int_client.iter_containers('.misplaced_objects'):
|
|
for obj in int_client.iter_objects('.misplaced_objects',
|
|
container['name']):
|
|
expected = '%d:/%s/%s/%s' % (new_policy, self.account,
|
|
self.container_name,
|
|
self.object_name)
|
|
self.assertEqual(obj['name'], expected)
|
|
|
|
Manager(['container-reconciler']).once()
|
|
|
|
# verify object in old_policy
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
headers={'X-Backend-Storage-Policy-Index': int(old_policy)})
|
|
|
|
# verify object is *not* in new_policy
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
acceptable_statuses=(4,),
|
|
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
|
|
|
|
self.get_to_final_state()
|
|
|
|
# verify entry in the queue
|
|
for container in int_client.iter_containers('.misplaced_objects'):
|
|
for obj in int_client.iter_objects('.misplaced_objects',
|
|
container['name']):
|
|
expected = '%d:/%s/%s/%s' % (old_policy, self.account,
|
|
self.container_name,
|
|
self.object_name)
|
|
self.assertEqual(obj['name'], expected)
|
|
|
|
Manager(['container-reconciler']).once()
|
|
|
|
# and now it flops back
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
|
|
int_client.get_object_metadata(
|
|
self.account, self.container_name, self.object_name,
|
|
acceptable_statuses=(4,),
|
|
headers={'X-Backend-Storage-Policy-Index': int(old_policy)})
|
|
|
|
# make sure the queue is settled
|
|
self.get_to_final_state()
|
|
for container in int_client.iter_containers('.misplaced_objects'):
|
|
for obj in int_client.iter_objects('.misplaced_objects',
|
|
container['name']):
|
|
self.fail('Found unexpected object %r in the queue' % obj)
|
|
|
|
# verify that the object data read by external client is correct
|
|
headers, data = self._get_object_patiently(int(new_policy))
|
|
self.assertEqual('VERIFY', data)
|
|
self.assertEqual('custom-meta', headers['x-object-meta-test'])
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|