247 lines
11 KiB
Python
247 lines
11 KiB
Python
# Copyright (c) 2010-2011 OpenStack, LLC.
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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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import cPickle as pickle
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import os
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import unittest
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from gzip import GzipFile
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from shutil import rmtree
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from time import sleep, time
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from swift.common import ring, utils
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class TestRingData(unittest.TestCase):
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def test_attrs(self):
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r2p2d = [[0, 1, 0, 1], [0, 1, 0, 1]]
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d = [{'id': 0, 'zone': 0}, {'id': 1, 'zone': 1}]
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s = 30
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rd = ring.RingData(r2p2d, d, s)
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self.assertEquals(rd._replica2part2dev_id, r2p2d)
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self.assertEquals(rd.devs, d)
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self.assertEquals(rd._part_shift, s)
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def test_pickleable(self):
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rd = ring.RingData([[0, 1, 0, 1], [0, 1, 0, 1]],
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[{'id': 0, 'zone': 0}, {'id': 1, 'zone': 1}], 30)
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for p in xrange(pickle.HIGHEST_PROTOCOL):
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pickle.loads(pickle.dumps(rd, protocol=p))
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class TestRing(unittest.TestCase):
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def setUp(self):
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utils.HASH_PATH_SUFFIX = 'endcap'
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self.testdir = os.path.join(os.path.dirname(__file__), 'ring')
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rmtree(self.testdir, ignore_errors=1)
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os.mkdir(self.testdir)
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self.testgz = os.path.join(self.testdir, 'whatever.ring.gz')
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self.intended_replica2part2dev_id = [[0, 2, 0, 2], [2, 0, 2, 0]]
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self.intended_devs = [{'id': 0, 'zone': 0, 'weight': 1.0}, None,
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{'id': 2, 'zone': 2, 'weight': 1.0}]
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self.intended_part_shift = 30
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self.intended_reload_time = 15
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pickle.dump(ring.RingData(self.intended_replica2part2dev_id,
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self.intended_devs, self.intended_part_shift),
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GzipFile(self.testgz, 'wb'))
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self.ring = ring.Ring(self.testdir,
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reload_time=self.intended_reload_time, ring_name='whatever')
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def tearDown(self):
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rmtree(self.testdir, ignore_errors=1)
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def test_creation(self):
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self.assertEquals(self.ring._replica2part2dev_id,
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self.intended_replica2part2dev_id)
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self.assertEquals(self.ring._part_shift, self.intended_part_shift)
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self.assertEquals(self.ring.devs, self.intended_devs)
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self.assertEquals(self.ring.reload_time, self.intended_reload_time)
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self.assertEquals(self.ring.pickle_gz_path, self.testgz)
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# test invalid endcap
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_orig_hash_path_suffix = utils.HASH_PATH_SUFFIX
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try:
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utils.HASH_PATH_SUFFIX = ''
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self.assertRaises(SystemExit, ring.Ring, self.testdir, 'whatever')
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finally:
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utils.HASH_PATH_SUFFIX = _orig_hash_path_suffix
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def test_has_changed(self):
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self.assertEquals(self.ring.has_changed(), False)
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os.utime(self.testgz, (time() + 60, time() + 60))
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self.assertEquals(self.ring.has_changed(), True)
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def test_reload(self):
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os.utime(self.testgz, (time() - 300, time() - 300))
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self.ring = ring.Ring(self.testdir, reload_time=0.001,
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ring_name='whatever')
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orig_mtime = self.ring._mtime
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self.assertEquals(len(self.ring.devs), 3)
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self.intended_devs.append({'id': 3, 'zone': 3, 'weight': 1.0})
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pickle.dump(ring.RingData(self.intended_replica2part2dev_id,
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self.intended_devs, self.intended_part_shift),
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GzipFile(self.testgz, 'wb'))
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sleep(0.1)
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self.ring.get_nodes('a')
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self.assertEquals(len(self.ring.devs), 4)
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self.assertNotEquals(self.ring._mtime, orig_mtime)
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os.utime(self.testgz, (time() - 300, time() - 300))
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self.ring = ring.Ring(self.testdir, reload_time=0.001,
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ring_name='whatever')
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orig_mtime = self.ring._mtime
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self.assertEquals(len(self.ring.devs), 4)
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self.intended_devs.append({'id': 4, 'zone': 4, 'weight': 1.0})
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pickle.dump(ring.RingData(self.intended_replica2part2dev_id,
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self.intended_devs, self.intended_part_shift),
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GzipFile(self.testgz, 'wb'))
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sleep(0.1)
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self.ring.get_part_nodes(0)
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self.assertEquals(len(self.ring.devs), 5)
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self.assertNotEquals(self.ring._mtime, orig_mtime)
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os.utime(self.testgz, (time() - 300, time() - 300))
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self.ring = ring.Ring(self.testdir, reload_time=0.001,
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ring_name='whatever')
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orig_mtime = self.ring._mtime
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part, nodes = self.ring.get_nodes('a')
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self.assertEquals(len(self.ring.devs), 5)
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self.intended_devs.append({'id': 5, 'zone': 5, 'weight': 1.0})
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pickle.dump(ring.RingData(self.intended_replica2part2dev_id,
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self.intended_devs, self.intended_part_shift),
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GzipFile(self.testgz, 'wb'))
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sleep(0.1)
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self.ring.get_more_nodes(part).next()
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self.assertEquals(len(self.ring.devs), 6)
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self.assertNotEquals(self.ring._mtime, orig_mtime)
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def test_get_part_nodes(self):
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part, nodes = self.ring.get_nodes('a')
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self.assertEquals(nodes, self.ring.get_part_nodes(part))
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def test_get_nodes(self):
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# Yes, these tests are deliberately very fragile. We want to make sure
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# that if someones changes the results the ring produces, they know it.
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self.assertRaises(TypeError, self.ring.get_nodes)
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part, nodes = self.ring.get_nodes('a')
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self.assertEquals(part, 0)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a1')
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self.assertEquals(part, 0)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a4')
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self.assertEquals(part, 1)
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self.assertEquals(nodes, [{'id': 2, 'zone': 2, 'weight': 1.0},
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{'id': 0, 'zone': 0, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('aa')
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self.assertEquals(part, 1)
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self.assertEquals(nodes, [{'id': 2, 'zone': 2, 'weight': 1.0},
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{'id': 0, 'zone': 0, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c1')
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self.assertEquals(part, 0)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c0')
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self.assertEquals(part, 3)
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self.assertEquals(nodes, [{'id': 2, 'zone': 2, 'weight': 1.0},
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{'id': 0, 'zone': 0, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c3')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c', 'o1')
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self.assertEquals(part, 1)
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self.assertEquals(nodes, [{'id': 2, 'zone': 2, 'weight': 1.0},
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{'id': 0, 'zone': 0, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c', 'o5')
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self.assertEquals(part, 0)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c', 'o0')
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self.assertEquals(part, 0)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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part, nodes = self.ring.get_nodes('a', 'c', 'o2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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def test_get_more_nodes(self):
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# Yes, these tests are deliberately very fragile. We want to make sure
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# that if someone changes the results the ring produces, they know it.
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part, nodes = self.ring.get_nodes('a', 'c', 'o2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [])
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self.ring.devs.append({'id': 3, 'zone': 0, 'weight': 1.0})
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self.ring.zone2devs[0].append(self.ring.devs[3])
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part, nodes = self.ring.get_nodes('a', 'c', 'o2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [])
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self.ring.zone2devs[self.ring.devs[3]['zone']].remove(self.ring.devs[3])
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self.ring.devs[3]['zone'] = 3
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self.ring.zone2devs[3] = [self.ring.devs[3]]
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part, nodes = self.ring.get_nodes('a', 'c', 'o2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [{'id': 3, 'zone': 3, 'weight': 1.0}])
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self.ring.devs.append(None)
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self.ring.devs.append({'id': 5, 'zone': 5, 'weight': 1.0})
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self.ring.zone2devs[5] = [self.ring.devs[5]]
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part, nodes = self.ring.get_nodes('a', 'c', 'o2')
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self.assertEquals(part, 2)
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self.assertEquals(nodes, [{'id': 0, 'zone': 0, 'weight': 1.0},
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{'id': 2, 'zone': 2, 'weight': 1.0}])
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [{'id': 3, 'zone': 3, 'weight': 1.0},
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{'id': 5, 'zone': 5, 'weight': 1.0}])
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self.ring.devs.append({'id': 6, 'zone': 5, 'weight': 1.0})
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self.ring.zone2devs[5].append(self.ring.devs[6])
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [{'id': 3, 'zone': 3, 'weight': 1.0},
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{'id': 5, 'zone': 5, 'weight': 1.0}])
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self.ring.devs[5]['weight'] = 0
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [{'id': 3, 'zone': 3, 'weight': 1.0},
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{'id': 6, 'zone': 5, 'weight': 1.0}])
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self.ring.devs[3]['weight'] = 0
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self.ring.devs.append({'id': 7, 'zone': 6, 'weight': 0.0})
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self.ring.zone2devs[6] = [self.ring.devs[7]]
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nodes = list(self.ring.get_more_nodes(part))
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self.assertEquals(nodes, [{'id': 6, 'zone': 5, 'weight': 1.0}])
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if __name__ == '__main__':
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unittest.main()
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