647b66a2ce
This patch adds the erasure code reconstructor. It follows the design of the replicator but: - There is no notion of update() or update_deleted(). - There is a single job processor - Jobs are processed partition by partition. - At the end of processing a rebalanced or handoff partition, the reconstructor will remove successfully reverted objects if any. And various ssync changes such as the addition of reconstruct_fa() function called from ssync_sender which performs the actual reconstruction while sending the object to the receiver Co-Authored-By: Alistair Coles <alistair.coles@hp.com> Co-Authored-By: Thiago da Silva <thiago@redhat.com> Co-Authored-By: John Dickinson <me@not.mn> Co-Authored-By: Clay Gerrard <clay.gerrard@gmail.com> Co-Authored-By: Tushar Gohad <tushar.gohad@intel.com> Co-Authored-By: Samuel Merritt <sam@swiftstack.com> Co-Authored-By: Christian Schwede <christian.schwede@enovance.com> Co-Authored-By: Yuan Zhou <yuan.zhou@intel.com> blueprint ec-reconstructor Change-Id: I7d15620dc66ee646b223bb9fff700796cd6bef51
158 lines
5.3 KiB
Python
158 lines
5.3 KiB
Python
#!/usr/bin/python -u
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# Copyright (c) 2010-2012 OpenStack Foundation
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#
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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 unittest
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import uuid
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import random
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import os
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import errno
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from test.probe.common import ECProbeTest
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from swift.common import direct_client
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from swift.common.storage_policy import EC_POLICY
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from swift.common.manager import Manager
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from swiftclient import client
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class Body(object):
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def __init__(self, total=3.5 * 2 ** 20):
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self.total = total
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self.hasher = md5()
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self.size = 0
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self.chunk = 'test' * 16 * 2 ** 10
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@property
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def etag(self):
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return self.hasher.hexdigest()
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def __iter__(self):
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return self
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def next(self):
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if self.size > self.total:
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raise StopIteration()
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self.size += len(self.chunk)
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self.hasher.update(self.chunk)
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return self.chunk
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def __next__(self):
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return self.next()
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class TestReconstructorPropDurable(ECProbeTest):
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def setUp(self):
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super(TestReconstructorPropDurable, 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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# sanity
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self.assertEqual(self.policy.policy_type, EC_POLICY)
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self.reconstructor = Manager(["object-reconstructor"])
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def direct_get(self, node, part):
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req_headers = {'X-Backend-Storage-Policy-Index': int(self.policy)}
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headers, data = direct_client.direct_get_object(
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node, part, self.account, self.container_name,
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self.object_name, headers=req_headers,
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resp_chunk_size=64 * 2 ** 20)
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hasher = md5()
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for chunk in data:
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hasher.update(chunk)
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return hasher.hexdigest()
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def _check_node(self, node, part, etag, headers_post):
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# get fragment archive etag
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fragment_archive_etag = self.direct_get(node, part)
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# remove the .durable from the selected node
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part_dir = self.storage_dir('object', node, part=part)
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for dirs, subdirs, files in os.walk(part_dir):
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for fname in files:
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if fname.endswith('.durable'):
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durable = os.path.join(dirs, fname)
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os.remove(durable)
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break
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try:
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os.remove(os.path.join(part_dir, 'hashes.pkl'))
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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# fire up reconstructor to propogate the .durable
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self.reconstructor.once()
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# fragment is still exactly as it was before!
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self.assertEqual(fragment_archive_etag,
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self.direct_get(node, part))
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# check meta
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meta = 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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for key in headers_post:
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self.assertTrue(key in meta)
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self.assertEqual(meta[key], headers_post[key])
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def _format_node(self, node):
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return '%s#%s' % (node['device'], node['index'])
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def test_main(self):
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# create EC container
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headers = {'X-Storage-Policy': self.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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# PUT object
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contents = Body()
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headers = {'x-object-meta-foo': 'meta-foo'}
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headers_post = {'x-object-meta-bar': 'meta-bar'}
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etag = client.put_object(self.url, self.token,
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self.container_name,
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self.object_name,
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contents=contents, headers=headers)
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client.post_object(self.url, self.token, self.container_name,
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self.object_name, headers=headers_post)
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del headers_post['X-Auth-Token'] # WTF, where did this come from?
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# built up a list of node lists to kill a .durable from,
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# first try a single node
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# then adjacent nodes and then nodes >1 node apart
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opart, onodes = self.object_ring.get_nodes(
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self.account, self.container_name, self.object_name)
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single_node = [random.choice(onodes)]
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adj_nodes = [onodes[0], onodes[-1]]
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far_nodes = [onodes[0], onodes[-2]]
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test_list = [single_node, adj_nodes, far_nodes]
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for node_list in test_list:
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for onode in node_list:
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try:
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self._check_node(onode, opart, etag, headers_post)
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except AssertionError as e:
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self.fail(
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str(e) + '\n... for node %r of scenario %r' % (
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self._format_node(onode),
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[self._format_node(n) for n in node_list]))
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if __name__ == "__main__":
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unittest.main()
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