1 # -*- coding: utf-8 -*-
4 from twisted.trial import unittest
5 from twisted.internet import defer
6 from allmydata import uri
7 from allmydata.util.consumer import download_to_data
8 from allmydata.immutable import upload
9 from allmydata.mutable.common import UnrecoverableFileError
10 from allmydata.storage.common import storage_index_to_dir
11 from allmydata.test.no_network import GridTestMixin
12 from allmydata.test.common import ShouldFailMixin, _corrupt_share_data
13 from allmydata.interfaces import NotEnoughSharesError
15 immutable_plaintext = "data" * 10000
16 mutable_plaintext = "muta" * 10000
18 class HungServerDownloadTest(GridTestMixin, ShouldFailMixin, unittest.TestCase):
19 # Many of these tests take around 60 seconds on François's ARM buildslave:
20 # http://tahoe-lafs.org/buildbot/builders/FranXois%20lenny-armv5tel
21 # allmydata.test.test_hung_server.HungServerDownloadTest.test_2_good_8_broken_duplicate_share_fail once ERRORed after 197 seconds on Midnight Magic's NetBSD buildslave:
22 # http://tahoe-lafs.org/buildbot/builders/MM%20netbsd4%20i386%20warp
23 # MM's buildslave varies a lot in how long it takes to run tests.
27 def _break(self, servers):
28 for (id, ss) in servers:
29 self.g.break_server(id)
31 def _hang(self, servers, **kwargs):
32 for (id, ss) in servers:
33 self.g.hang_server(id, **kwargs)
35 def _unhang(self, servers, **kwargs):
36 for (id, ss) in servers:
37 self.g.unhang_server(id, **kwargs)
39 def _delete_all_shares_from(self, servers):
40 serverids = [id for (id, ss) in servers]
41 for (i_shnum, i_serverid, i_sharefile) in self.shares:
42 if i_serverid in serverids:
43 os.unlink(i_sharefile)
45 def _corrupt_all_shares_in(self, servers, corruptor_func):
46 serverids = [id for (id, ss) in servers]
47 for (i_shnum, i_serverid, i_sharefile) in self.shares:
48 if i_serverid in serverids:
49 self._corrupt_share((i_shnum, i_sharefile), corruptor_func)
51 def _copy_all_shares_from(self, from_servers, to_server):
52 serverids = [id for (id, ss) in from_servers]
53 for (i_shnum, i_serverid, i_sharefile) in self.shares:
54 if i_serverid in serverids:
55 self._copy_share((i_shnum, i_sharefile), to_server)
57 def _copy_share(self, share, to_server):
58 (sharenum, sharefile) = share
60 shares_dir = os.path.join(ss.original.storedir, "shares")
61 si = uri.from_string(self.uri).get_storage_index()
62 si_dir = os.path.join(shares_dir, storage_index_to_dir(si))
63 if not os.path.exists(si_dir):
65 new_sharefile = os.path.join(si_dir, str(sharenum))
66 shutil.copy(sharefile, new_sharefile)
67 self.shares = self.find_uri_shares(self.uri)
68 # Make sure that the storage server has the share.
69 self.failUnless((sharenum, ss.original.my_nodeid, new_sharefile)
72 def _corrupt_share(self, share, corruptor_func):
73 (sharenum, sharefile) = share
74 data = open(sharefile, "rb").read()
75 newdata = corruptor_func(data)
77 wf = open(sharefile, "wb")
81 def _set_up(self, mutable, testdir, num_clients=1, num_servers=10):
82 self.mutable = mutable
84 self.basedir = "hung_server/mutable_" + testdir
86 self.basedir = "hung_server/immutable_" + testdir
88 self.set_up_grid(num_clients=num_clients, num_servers=num_servers)
90 self.c0 = self.g.clients[0]
91 nm = self.c0.nodemaker
92 self.servers = [(id, ss) for (id, ss) in nm.storage_broker.get_all_servers()]
95 d = nm.create_mutable_file(mutable_plaintext)
96 def _uploaded_mutable(node):
97 self.uri = node.get_uri()
98 self.shares = self.find_uri_shares(self.uri)
99 d.addCallback(_uploaded_mutable)
101 data = upload.Data(immutable_plaintext, convergence="")
102 d = self.c0.upload(data)
103 def _uploaded_immutable(upload_res):
104 self.uri = upload_res.uri
105 self.shares = self.find_uri_shares(self.uri)
106 d.addCallback(_uploaded_immutable)
109 def _start_download(self):
110 n = self.c0.create_node_from_uri(self.uri)
112 d = n.download_best_version()
113 stage_4_d = None # currently we aren't doing any tests which require this for mutable files
115 d = download_to_data(n)
116 stage_4_d = n._downloader._all_downloads.keys()[0]._stage_4_d # too ugly! FIXME
117 return (d, stage_4_d,)
119 def _wait_for_data(self, n):
121 d = n.download_best_version()
123 d = download_to_data(n)
126 def _check(self, resultingdata):
128 self.failUnlessEqual(resultingdata, mutable_plaintext)
130 self.failUnlessEqual(resultingdata, immutable_plaintext)
132 def _download_and_check(self):
133 d, stage4d = self._start_download()
134 d.addCallback(self._check)
137 def _should_fail_download(self):
139 return self.shouldFail(UnrecoverableFileError, self.basedir,
140 "no recoverable versions",
141 self._download_and_check)
143 return self.shouldFail(NotEnoughSharesError, self.basedir,
144 "Failed to get enough shareholders",
145 self._download_and_check)
148 def test_10_good_sanity_check(self):
149 d = defer.succeed(None)
150 for mutable in [False, True]:
151 d.addCallback(lambda ign: self._set_up(mutable, "test_10_good_sanity_check"))
152 d.addCallback(lambda ign: self._download_and_check())
155 def test_10_good_copied_share(self):
156 d = defer.succeed(None)
157 for mutable in [False, True]:
158 d.addCallback(lambda ign: self._set_up(mutable, "test_10_good_copied_share"))
159 d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[2:3], self.servers[0]))
160 d.addCallback(lambda ign: self._download_and_check())
163 def test_3_good_7_noshares(self):
164 d = defer.succeed(None)
165 for mutable in [False, True]:
166 d.addCallback(lambda ign: self._set_up(mutable, "test_3_good_7_noshares"))
167 d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[3:]))
168 d.addCallback(lambda ign: self._download_and_check())
171 def test_2_good_8_broken_fail(self):
172 d = defer.succeed(None)
173 for mutable in [False, True]:
174 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_fail"))
175 d.addCallback(lambda ign: self._break(self.servers[2:]))
176 d.addCallback(lambda ign: self._should_fail_download())
179 def test_2_good_8_noshares_fail(self):
180 d = defer.succeed(None)
181 for mutable in [False, True]:
182 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_noshares_fail"))
183 d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[2:]))
184 d.addCallback(lambda ign: self._should_fail_download())
187 def test_2_good_8_broken_copied_share(self):
188 d = defer.succeed(None)
189 for mutable in [False, True]:
190 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_copied_share"))
191 d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[2:3], self.servers[0]))
192 d.addCallback(lambda ign: self._break(self.servers[2:]))
193 d.addCallback(lambda ign: self._download_and_check())
196 def test_2_good_8_broken_duplicate_share_fail(self):
197 d = defer.succeed(None)
198 for mutable in [False, True]:
199 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_duplicate_share_fail"))
200 d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[1:2], self.servers[0]))
201 d.addCallback(lambda ign: self._break(self.servers[2:]))
202 d.addCallback(lambda ign: self._should_fail_download())
205 # The tests below do not currently pass for mutable files.
207 def test_3_good_7_hung(self):
208 d = defer.succeed(None)
209 for mutable in [False]:
210 d.addCallback(lambda ign: self._set_up(mutable, "test_3_good_7_hung"))
211 d.addCallback(lambda ign: self._hang(self.servers[3:]))
212 d.addCallback(lambda ign: self._download_and_check())
215 def test_2_good_8_hung_then_1_recovers(self):
216 d = defer.succeed(None)
217 for mutable in [False]:
218 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_hung_then_1_recovers"))
219 d.addCallback(lambda ign: self._hang(self.servers[2:3]))
220 d.addCallback(lambda ign: self._hang(self.servers[3:]))
221 d.addCallback(lambda ign: self._unhang(self.servers[2:3]))
222 d.addCallback(lambda ign: self._download_and_check())
225 def test_2_good_8_hung_then_1_recovers_with_2_shares(self):
226 d = defer.succeed(None)
227 for mutable in [False]:
228 d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_hung_then_1_recovers_with_2_shares"))
229 d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[0:1], self.servers[2]))
230 d.addCallback(lambda ign: self._hang(self.servers[2:3]))
231 d.addCallback(lambda ign: self._hang(self.servers[3:]))
232 d.addCallback(lambda ign: self._unhang(self.servers[2:3]))
233 d.addCallback(lambda ign: self._download_and_check())
236 def test_failover_during_stage_4(self):
238 d = defer.succeed(None)
239 for mutable in [False]:
240 d.addCallback(lambda ign: self._set_up(mutable, "test_failover_during_stage_4"))
241 d.addCallback(lambda ign: self._corrupt_all_shares_in(self.servers[2:3], _corrupt_share_data))
242 d.addCallback(lambda ign: self._set_up(mutable, "test_failover_during_stage_4"))
243 d.addCallback(lambda ign: self._hang(self.servers[3:]))
244 d.addCallback(lambda ign: self._start_download())
245 def _after_starting_download((doned, started4d)):
246 started4d.addCallback(lambda ign: self._unhang(self.servers[3:4]))
247 doned.addCallback(self._check)
249 d.addCallback(_after_starting_download)