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#!/usr/bin/python -u
# 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.
from hashlib import md5
import time
import unittest
import uuid
import random
from nose import SkipTest
from swift.common.manager import Manager
from swift.common.internal_client import InternalClient
from swift.common import utils, direct_client
from swift.common.storage_policy import POLICIES
from swift.common.http import HTTP_NOT_FOUND
from test.probe.brain import BrainSplitter
from test.probe.common import reset_environment, get_to_final_state
from swiftclient import client, ClientException
TIMEOUT = 60
class TestContainerMergePolicyIndex(unittest.TestCase):
def setUp(self):
if len(POLICIES) < 2:
raise SkipTest()
(self.pids, self.port2server, self.account_ring, self.container_ring,
self.object_ring, self.policy, self.url, self.token,
self.account, self.configs) = reset_environment()
self.container_name = 'container-%s' % uuid.uuid4()
self.object_name = 'object-%s' % uuid.uuid4()
self.brain = BrainSplitter(self.url, self.token, self.container_name,
self.object_name, 'container')
def test_merge_storage_policy_index(self):
# generic split brain
self.brain.stop_primary_half()
self.brain.put_container()
self.brain.start_primary_half()
self.brain.stop_handoff_half()
self.brain.put_container()
self.brain.put_object()
self.brain.start_handoff_half()
# make sure we have some manner of split brain
container_part, container_nodes = self.container_ring.get_nodes(
self.account, self.container_name)
head_responses = []
for node in container_nodes:
metadata = direct_client.direct_head_container(
node, container_part, self.account, self.container_name)
head_responses.append((node, metadata))
found_policy_indexes = \
set(metadata['X-Backend-Storage-Policy-Index'] for
node, metadata in head_responses)
self.assert_(len(found_policy_indexes) > 1,
'primary nodes did not disagree about policy index %r' %
head_responses)
# find our object
orig_policy_index = None
for policy_index in found_policy_indexes:
object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
part, nodes = object_ring.get_nodes(
self.account, self.container_name, self.object_name)
for node in nodes:
try:
direct_client.direct_head_object(
node, part, self.account, self.container_name,
self.object_name,
headers={'X-Backend-Storage-Policy-Index':
policy_index})
except direct_client.ClientException as err:
continue
orig_policy_index = policy_index
break
if orig_policy_index is not None:
break
else:
self.fail('Unable to find /%s/%s/%s in %r' % (
self.account, self.container_name, self.object_name,
found_policy_indexes))
get_to_final_state()
Manager(['container-reconciler']).once()
# validate containers
head_responses = []
for node in container_nodes:
metadata = direct_client.direct_head_container(
node, container_part, self.account, self.container_name)
head_responses.append((node, metadata))
found_policy_indexes = \
set(metadata['X-Backend-Storage-Policy-Index'] for
node, metadata in head_responses)
self.assert_(len(found_policy_indexes) == 1,
'primary nodes disagree about policy index %r' %
head_responses)
expected_policy_index = found_policy_indexes.pop()
self.assertNotEqual(orig_policy_index, expected_policy_index)
# validate object placement
orig_policy_ring = POLICIES.get_object_ring(orig_policy_index,
'/etc/swift')
for node in orig_policy_ring.devs:
try:
direct_client.direct_head_object(
node, part, self.account, self.container_name,
self.object_name, headers={
'X-Backend-Storage-Policy-Index': orig_policy_index})
except direct_client.ClientException as err:
if err.http_status == HTTP_NOT_FOUND:
continue
raise
else:
self.fail('Found /%s/%s/%s in %s' % (
self.account, self.container_name, self.object_name,
orig_policy_index))
# use proxy to access object (bad container info might be cached...)
timeout = time.time() + TIMEOUT
while time.time() < timeout:
try:
metadata = client.head_object(self.url, self.token,
self.container_name,
self.object_name)
except ClientException as err:
if err.http_status != HTTP_NOT_FOUND:
raise
time.sleep(1)
else:
break
else:
self.fail('could not HEAD /%s/%s/%s/ from policy %s '
'after %s seconds.' % (
self.account, self.container_name, self.object_name,
expected_policy_index, TIMEOUT))
def test_reconcile_delete(self):
# generic split brain
self.brain.stop_primary_half()
self.brain.put_container()
self.brain.put_object()
self.brain.start_primary_half()
self.brain.stop_handoff_half()
self.brain.put_container()
self.brain.delete_object()
self.brain.start_handoff_half()
# make sure we have some manner of split brain
container_part, container_nodes = self.container_ring.get_nodes(
self.account, self.container_name)
head_responses = []
for node in container_nodes:
metadata = direct_client.direct_head_container(
node, container_part, self.account, self.container_name)
head_responses.append((node, metadata))
found_policy_indexes = \
set(metadata['X-Backend-Storage-Policy-Index'] for
node, metadata in head_responses)
self.assert_(len(found_policy_indexes) > 1,
'primary nodes did not disagree about policy index %r' %
head_responses)
# find our object
orig_policy_index = ts_policy_index = None
for policy_index in found_policy_indexes:
object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
part, nodes = object_ring.get_nodes(
self.account, self.container_name, self.object_name)
for node in nodes:
try:
direct_client.direct_head_object(
node, part, self.account, self.container_name,
self.object_name,
headers={'X-Backend-Storage-Policy-Index':
policy_index})
except direct_client.ClientException as err:
if 'x-backend-timestamp' in err.http_headers:
ts_policy_index = policy_index
break
else:
orig_policy_index = policy_index
break
if not orig_policy_index:
self.fail('Unable to find /%s/%s/%s in %r' % (
self.account, self.container_name, self.object_name,
found_policy_indexes))
if not ts_policy_index:
self.fail('Unable to find tombstone /%s/%s/%s in %r' % (
self.account, self.container_name, self.object_name,
found_policy_indexes))
get_to_final_state()
Manager(['container-reconciler']).once()
# validate containers
head_responses = []
for node in container_nodes:
metadata = direct_client.direct_head_container(
node, container_part, self.account, self.container_name)
head_responses.append((node, metadata))
new_found_policy_indexes = \
set(metadata['X-Backend-Storage-Policy-Index'] for node,
metadata in head_responses)
self.assert_(len(new_found_policy_indexes) == 1,
'primary nodes disagree about policy index %r' %
dict((node['port'],
metadata['X-Backend-Storage-Policy-Index'])
for node, metadata in head_responses))
expected_policy_index = new_found_policy_indexes.pop()
self.assertEqual(orig_policy_index, expected_policy_index)
# validate object fully deleted
for policy_index in found_policy_indexes:
object_ring = POLICIES.get_object_ring(policy_index, '/etc/swift')
part, nodes = object_ring.get_nodes(
self.account, self.container_name, self.object_name)
for node in nodes:
try:
direct_client.direct_head_object(
node, part, self.account, self.container_name,
self.object_name,
headers={'X-Backend-Storage-Policy-Index':
policy_index})
except direct_client.ClientException as err:
if err.http_status == HTTP_NOT_FOUND:
continue
else:
self.fail('Found /%s/%s/%s in %s on %s' % (
self.account, self.container_name, self.object_name,
orig_policy_index, node))
def test_reconcile_manifest(self):
manifest_data = []
def write_part(i):
body = 'VERIFY%0.2d' % i + '\x00' * 1048576
part_name = 'manifest_part_%0.2d' % i
manifest_entry = {
"path": "/%s/%s" % (self.container_name, part_name),
"etag": md5(body).hexdigest(),
"size_bytes": len(body),
}
client.put_object(self.url, self.token, self.container_name,
part_name, contents=body)
manifest_data.append(manifest_entry)
# get an old container stashed
self.brain.stop_primary_half()
policy = random.choice(list(POLICIES))
self.brain.put_container(policy.idx)
self.brain.start_primary_half()
# write some parts
for i in range(10):
write_part(i)
self.brain.stop_handoff_half()
wrong_policy = random.choice([p for p in POLICIES if p is not policy])
self.brain.put_container(wrong_policy.idx)
# write some more parts
for i in range(10, 20):
write_part(i)
# write manifest
try:
client.put_object(self.url, self.token, self.container_name,
self.object_name,
contents=utils.json.dumps(manifest_data),
query_string='multipart-manifest=put')
except ClientException as err:
# so as it works out, you can't really upload a multi-part
# manifest for objects that are currently misplaced - you have to
# wait until they're all available - which is about the same as
# some other failure that causes data to be unavailable to the
# proxy at the time of upload
self.assertEqual(err.http_status, 400)
# but what the heck, we'll sneak one in just to see what happens...
direct_manifest_name = self.object_name + '-direct-test'
object_ring = POLICIES.get_object_ring(wrong_policy.idx, '/etc/swift')
part, nodes = object_ring.get_nodes(
self.account, self.container_name, direct_manifest_name)
container_part = self.container_ring.get_part(self.account,
self.container_name)
def translate_direct(data):
return {
'hash': data['etag'],
'bytes': data['size_bytes'],
'name': data['path'],
}
direct_manifest_data = map(translate_direct, manifest_data)
headers = {
'x-container-host': ','.join('%s:%s' % (n['ip'], n['port']) for n
in self.container_ring.devs),
'x-container-device': ','.join(n['device'] for n in
self.container_ring.devs),
'x-container-partition': container_part,
'X-Backend-Storage-Policy-Index': wrong_policy.idx,
'X-Static-Large-Object': 'True',
}
for node in nodes:
direct_client.direct_put_object(
node, part, self.account, self.container_name,
direct_manifest_name,
contents=utils.json.dumps(direct_manifest_data),
headers=headers)
break # one should do it...
self.brain.start_handoff_half()
get_to_final_state()
Manager(['container-reconciler']).once()
# clear proxy cache
client.post_container(self.url, self.token, self.container_name, {})
# let's see how that direct upload worked out...
metadata, body = client.get_object(
self.url, self.token, self.container_name, direct_manifest_name,
query_string='multipart-manifest=get')
self.assertEqual(metadata['x-static-large-object'].lower(), 'true')
for i, entry in enumerate(utils.json.loads(body)):
for key in ('hash', 'bytes', 'name'):
self.assertEquals(entry[key], direct_manifest_data[i][key])
metadata, body = client.get_object(
self.url, self.token, self.container_name, direct_manifest_name)
self.assertEqual(metadata['x-static-large-object'].lower(), 'true')
self.assertEqual(int(metadata['content-length']),
sum(part['size_bytes'] for part in manifest_data))
self.assertEqual(body, ''.join('VERIFY%0.2d' % i + '\x00' * 1048576
for i in range(20)))
# and regular upload should work now too
client.put_object(self.url, self.token, self.container_name,
self.object_name,
contents=utils.json.dumps(manifest_data),
query_string='multipart-manifest=put')
metadata = client.head_object(self.url, self.token,
self.container_name,
self.object_name)
self.assertEqual(int(metadata['content-length']),
sum(part['size_bytes'] for part in manifest_data))
def test_reconciler_move_object_twice(self):
# select some policies
old_policy = random.choice(list(POLICIES))
new_policy = random.choice([p for p in POLICIES if p != old_policy])
# setup a split brain
self.brain.stop_handoff_half()
# get old_policy on two primaries
self.brain.put_container(policy_index=int(old_policy))
self.brain.start_handoff_half()
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 = []
for node in container_nodes:
metadata = direct_client.direct_head_container(
node, container_part, self.account, self.container_name)
head_responses.append((node, metadata))
old_container_node_ids = [
node['id'] for node, metadata in head_responses
if int(old_policy) ==
int(metadata['X-Backend-Storage-Policy-Index'])]
self.assertEqual(2, len(old_container_node_ids))
# hopefully memcache still has the new policy cached
self.brain.put_object()
# 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]
client = InternalClient(conf_file, 'probe-test', 3)
client.get_object_metadata(
self.account, self.container_name, self.object_name,
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
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])
tuple(server.once(number=n + 1) for n in old_container_node_ids)
# verify entry in the queue for the "misplaced" new_policy
for container in client.iter_containers('.misplaced_objects'):
for obj in 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
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
client.get_object_metadata(
self.account, self.container_name, self.object_name,
acceptable_statuses=(4,),
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
get_to_final_state()
# verify entry in the queue
client = InternalClient(conf_file, 'probe-test', 3)
for container in client.iter_containers('.misplaced_objects'):
for obj in 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
client.get_object_metadata(
self.account, self.container_name, self.object_name,
headers={'X-Backend-Storage-Policy-Index': int(new_policy)})
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
get_to_final_state()
for container in client.iter_containers('.misplaced_objects'):
for obj in client.iter_objects('.misplaced_objects',
container['name']):
self.fail('Found unexpected object %r in the queue' % obj)
if __name__ == "__main__":
unittest.main()
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