81bc31e6ec
Keep status_changed_at in container databases current with status changes that occur as a result of container creation, deletion, or re-creation. Merge container put/delete/created timestamps when handling replicate responses from remote servers in addition to during the handling of the REPLICATE request. When storage policies are configured on a cluster send status_changed_at, object_count and storage_policy_index as part of container replication sync args. Use status_changed_at during replication to determine the oldest active container and merge storage_policy_index. DocImpact Implements: blueprint storage-policies Change-Id: Ib9a0dd42c271145e641437dc04d0ebea1e11fc47
255 lines
8.8 KiB
Python
255 lines
8.8 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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import sys
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import itertools
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import unittest
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import uuid
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from optparse import OptionParser
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from urlparse import urlparse
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import random
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from nose import SkipTest
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from swift.common.manager import Manager
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from swift.common.storage_policy import POLICIES
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from swift.common import utils, ring, direct_client
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from swift.common.http import HTTP_NOT_FOUND
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from test.probe.common import reset_environment, get_to_final_state
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from swiftclient import client, get_auth, ClientException
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TIMEOUT = 60
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def meta_command(name, bases, attrs):
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"""
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Look for attrs with a truthy attribute __command__ and add them to an
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attribute __commands__ on the type that maps names to decorated methods.
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The decorated methods' doc strings also get mapped in __docs__.
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Also adds a method run(command_name, *args, **kwargs) that will
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execute the method mapped to the name in __commands__.
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"""
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commands = {}
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docs = {}
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for attr, value in attrs.items():
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if getattr(value, '__command__', False):
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commands[attr] = value
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# methods have always have a __doc__ attribute, sometimes empty
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docs[attr] = (getattr(value, '__doc__', None) or
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'perform the %s command' % attr).strip()
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attrs['__commands__'] = commands
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attrs['__docs__'] = docs
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def run(self, command, *args, **kwargs):
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return self.__commands__[command](self, *args, **kwargs)
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attrs.setdefault('run', run)
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return type(name, bases, attrs)
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def command(f):
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f.__command__ = True
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return f
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class BrainSplitter(object):
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__metaclass__ = meta_command
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def __init__(self, url, token, container_name='test', object_name='test'):
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self.url = url
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self.token = token
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self.account = utils.split_path(urlparse(url).path, 2, 2)[1]
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self.container_name = container_name
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self.object_name = object_name
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self.servers = Manager(['container-server'])
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policies = list(POLICIES)
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random.shuffle(policies)
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self.policies = itertools.cycle(policies)
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container_part, container_nodes = ring.Ring(
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'/etc/swift/container.ring.gz').get_nodes(
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self.account, self.container_name)
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container_node_ids = [n['id'] for n in container_nodes]
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if all(n_id in container_node_ids for n_id in (0, 1)):
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self.primary_numbers = (1, 2)
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self.handoff_numbers = (3, 4)
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else:
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self.primary_numbers = (3, 4)
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self.handoff_numbers = (1, 2)
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@command
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def start_primary_half(self):
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"""
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start container servers 1 & 2
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"""
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tuple(self.servers.start(number=n) for n in self.primary_numbers)
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@command
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def stop_primary_half(self):
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"""
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stop container servers 1 & 2
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"""
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tuple(self.servers.stop(number=n) for n in self.primary_numbers)
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@command
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def start_handoff_half(self):
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"""
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start container servers 3 & 4
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"""
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tuple(self.servers.start(number=n) for n in self.handoff_numbers)
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@command
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def stop_handoff_half(self):
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"""
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stop container servers 3 & 4
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"""
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tuple(self.servers.stop(number=n) for n in self.handoff_numbers)
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@command
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def put_container(self, policy_index=None):
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"""
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put container with next storage policy
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"""
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policy = self.policies.next()
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if policy_index is not None:
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policy = POLICIES.get_by_index(int(policy_index))
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if not policy:
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raise ValueError('Unknown policy with index %s' % policy)
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headers = {'X-Storage-Policy': policy.name}
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client.put_container(self.url, self.token, self.container_name,
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headers=headers)
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@command
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def delete_container(self):
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"""
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delete container
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"""
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client.delete_container(self.url, self.token, self.container_name)
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@command
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def put_object(self, headers=None):
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"""
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issue put for zero byte test object
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"""
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client.put_object(self.url, self.token, self.container_name,
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self.object_name, headers=headers)
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@command
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def delete_object(self):
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"""
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issue delete for test object
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"""
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try:
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client.delete_object(self.url, self.token, 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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parser = OptionParser('%prog split-brain [options] '
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'<command>[:<args>[,<args>...]] [<command>...]')
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parser.usage += '\n\nCommands:\n\t' + \
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'\n\t'.join("%s - %s" % (name, doc) for name, doc in
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BrainSplitter.__docs__.items())
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parser.add_option('-c', '--container', default='container-%s' % uuid.uuid4(),
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help='set container name')
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parser.add_option('-o', '--object', default='object-%s' % uuid.uuid4(),
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help='set object name')
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class TestContainerMergePolicyIndex(unittest.TestCase):
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def setUp(self):
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if len(POLICIES) < 2:
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raise SkipTest()
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(self.pids, self.port2server, self.account_ring, self.container_ring,
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self.object_ring, self.url, self.token,
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self.account, self.configs) = reset_environment()
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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)
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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()
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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 = set(metadata['x-storage-policy-index'] for
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node, metadata in head_responses)
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self.assert_(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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get_to_final_state()
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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 = set(metadata['x-storage-policy-index'] for
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node, metadata in head_responses)
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self.assert_(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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def main():
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options, commands = parser.parse_args()
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commands.remove('split-brain')
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if not commands:
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parser.print_help()
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return 'ERROR: must specify at least one command'
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for cmd_args in commands:
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cmd = cmd_args.split(':', 1)[0]
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if cmd not in BrainSplitter.__commands__:
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parser.print_help()
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return 'ERROR: unknown command %s' % cmd
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url, token = get_auth('http://127.0.0.1:8080/auth/v1.0',
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'test:tester', 'testing')
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brain = BrainSplitter(url, token, options.container, options.object)
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for cmd_args in commands:
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parts = cmd_args.split(':', 1)
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command = parts[0]
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if len(parts) > 1:
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args = utils.list_from_csv(parts[1])
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else:
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args = ()
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try:
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brain.run(command, *args)
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except ClientException as e:
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print '**WARNING**: %s raised %s' % (command, e)
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print 'STATUS'.join(['*' * 25] * 2)
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brain.servers.status()
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sys.exit()
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if __name__ == "__main__":
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if any('split-brain' in arg for arg in sys.argv):
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sys.exit(main())
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unittest.main()
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