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git.proxmox.com Git - ceph.git/blob - ceph/qa/tasks/cephfs/test_journal_repair.py
a52455d7100072895e23b18c3ac1018d24e62c62
3 Test our tools for recovering the content of damaged journals
8 from textwrap
import dedent
11 from teuthology
.exceptions
import CommandFailedError
, ConnectionLostError
12 from tasks
.cephfs
.filesystem
import ObjectNotFound
, ROOT_INO
13 from tasks
.cephfs
.cephfs_test_case
import CephFSTestCase
, for_teuthology
14 from tasks
.workunit
import task
as workunit
16 log
= logging
.getLogger(__name__
)
19 class TestJournalRepair(CephFSTestCase
):
22 def test_inject_to_empty(self
):
24 That when some dentries in the journal but nothing is in
25 the backing store, we correctly populate the backing store
26 from the journalled dentries.
29 # Inject metadata operations
30 self
.mount_a
.run_shell(["touch", "rootfile"])
31 self
.mount_a
.run_shell(["mkdir", "subdir"])
32 self
.mount_a
.run_shell(["touch", "subdir/subdirfile"])
33 # There are several different paths for handling hardlinks, depending
34 # on whether an existing dentry (being overwritten) is also a hardlink
35 self
.mount_a
.run_shell(["mkdir", "linkdir"])
37 # Test inode -> remote transition for a dentry
38 self
.mount_a
.run_shell(["touch", "linkdir/link0"])
39 self
.mount_a
.run_shell(["rm", "-f", "linkdir/link0"])
40 self
.mount_a
.run_shell(["ln", "subdir/subdirfile", "linkdir/link0"])
42 # Test nothing -> remote transition
43 self
.mount_a
.run_shell(["ln", "subdir/subdirfile", "linkdir/link1"])
45 # Test remote -> inode transition
46 self
.mount_a
.run_shell(["ln", "subdir/subdirfile", "linkdir/link2"])
47 self
.mount_a
.run_shell(["rm", "-f", "linkdir/link2"])
48 self
.mount_a
.run_shell(["touch", "linkdir/link2"])
50 # Test remote -> diff remote transition
51 self
.mount_a
.run_shell(["ln", "subdir/subdirfile", "linkdir/link3"])
52 self
.mount_a
.run_shell(["rm", "-f", "linkdir/link3"])
53 self
.mount_a
.run_shell(["ln", "rootfile", "linkdir/link3"])
55 # Test an empty directory
56 self
.mount_a
.run_shell(["mkdir", "subdir/subsubdir"])
57 self
.mount_a
.run_shell(["sync"])
59 # Before we unmount, make a note of the inode numbers, later we will
60 # check that they match what we recover from the journal
61 rootfile_ino
= self
.mount_a
.path_to_ino("rootfile")
62 subdir_ino
= self
.mount_a
.path_to_ino("subdir")
63 linkdir_ino
= self
.mount_a
.path_to_ino("linkdir")
64 subdirfile_ino
= self
.mount_a
.path_to_ino("subdir/subdirfile")
65 subsubdir_ino
= self
.mount_a
.path_to_ino("subdir/subsubdir")
67 self
.mount_a
.umount_wait()
73 # Now, the journal should contain the operations, but the backing
75 with self
.assertRaises(ObjectNotFound
):
76 self
.fs
.list_dirfrag(subdir_ino
)
77 self
.assertEqual(self
.fs
.list_dirfrag(ROOT_INO
), [])
79 # Execute the dentry recovery, this should populate the backing store
80 self
.fs
.journal_tool(['event', 'recover_dentries', 'list'], 0)
82 # Dentries in ROOT_INO are present
83 self
.assertEqual(sorted(self
.fs
.list_dirfrag(ROOT_INO
)), sorted(['rootfile_head', 'subdir_head', 'linkdir_head']))
84 self
.assertEqual(self
.fs
.list_dirfrag(subdir_ino
), ['subdirfile_head', 'subsubdir_head'])
85 self
.assertEqual(sorted(self
.fs
.list_dirfrag(linkdir_ino
)),
86 sorted(['link0_head', 'link1_head', 'link2_head', 'link3_head']))
88 # Now check the MDS can read what we wrote: truncate the journal
90 self
.fs
.journal_tool(['journal', 'reset'], 0)
91 self
.fs
.mds_fail_restart()
92 self
.fs
.wait_for_daemons()
96 self
.mount_a
.wait_until_mounted()
98 # First ls -R to populate MDCache, such that hardlinks will
99 # resolve properly (recover_dentries does not create backtraces,
100 # so ordinarily hardlinks to inodes that happen not to have backtraces
101 # will be invisible in readdir).
102 # FIXME: hook in forward scrub here to regenerate backtraces
103 proc
= self
.mount_a
.run_shell(['ls', '-R'])
104 self
.mount_a
.umount_wait() # remount to clear client cache before our second ls
106 self
.mount_a
.wait_until_mounted()
108 proc
= self
.mount_a
.run_shell(['ls', '-R'])
109 self
.assertEqual(proc
.stdout
.getvalue().strip(),
129 # Check the correct inos were preserved by path
130 self
.assertEqual(rootfile_ino
, self
.mount_a
.path_to_ino("rootfile"))
131 self
.assertEqual(subdir_ino
, self
.mount_a
.path_to_ino("subdir"))
132 self
.assertEqual(subdirfile_ino
, self
.mount_a
.path_to_ino("subdir/subdirfile"))
133 self
.assertEqual(subsubdir_ino
, self
.mount_a
.path_to_ino("subdir/subsubdir"))
135 # Check that the hard link handling came out correctly
136 self
.assertEqual(self
.mount_a
.path_to_ino("linkdir/link0"), subdirfile_ino
)
137 self
.assertEqual(self
.mount_a
.path_to_ino("linkdir/link1"), subdirfile_ino
)
138 self
.assertNotEqual(self
.mount_a
.path_to_ino("linkdir/link2"), subdirfile_ino
)
139 self
.assertEqual(self
.mount_a
.path_to_ino("linkdir/link3"), rootfile_ino
)
141 # Create a new file, ensure it is not issued the same ino as one of the
143 self
.mount_a
.run_shell(["touch", "afterwards"])
144 new_ino
= self
.mount_a
.path_to_ino("afterwards")
145 self
.assertNotIn(new_ino
, [rootfile_ino
, subdir_ino
, subdirfile_ino
])
147 # Check that we can do metadata ops in the recovered directory
148 self
.mount_a
.run_shell(["touch", "subdir/subsubdir/subsubdirfile"])
150 @for_teuthology # 308s
151 def test_reset(self
):
153 That after forcibly modifying the backing store, we can get back into
154 a good state by resetting the MDSMap.
156 The scenario is that we have two active MDSs, and we lose the journals. Once
157 we have completely lost confidence in the integrity of the metadata, we want to
158 return the system to a single-MDS state to go into a scrub to recover what we
163 self
.fs
.set_max_mds(2)
165 # See that we have two active MDSs
166 self
.wait_until_equal(lambda: len(self
.fs
.get_active_names()), 2, 30,
167 reject_fn
=lambda v
: v
> 2 or v
< 1)
168 active_mds_names
= self
.fs
.get_active_names()
170 # Switch off any unneeded MDS daemons
171 for unneeded_mds
in set(self
.mds_cluster
.mds_ids
) - set(active_mds_names
):
172 self
.mds_cluster
.mds_stop(unneeded_mds
)
173 self
.mds_cluster
.mds_fail(unneeded_mds
)
175 # Create a dir on each rank
176 self
.mount_a
.run_shell(["mkdir", "alpha"])
177 self
.mount_a
.run_shell(["mkdir", "bravo"])
178 self
.mount_a
.setfattr("alpha/", "ceph.dir.pin", "0")
179 self
.mount_a
.setfattr("bravo/", "ceph.dir.pin", "1")
181 def subtrees_assigned():
182 got_subtrees
= self
.fs
.mds_asok(["get", "subtrees"], mds_id
=active_mds_names
[0])
184 for s
in got_subtrees
:
185 if s
['dir']['path'] == '/bravo':
186 if s
['auth_first'] == 1:
190 raise RuntimeError("/bravo is subtree but not rank 1!")
194 # Ensure the pinning has taken effect and the /bravo dir is now
195 # migrated to rank 1.
196 self
.wait_until_true(subtrees_assigned
, 30)
198 # Do some IO (this should be split across ranks according to
199 # the rank-pinned dirs)
200 self
.mount_a
.create_n_files("alpha/file", 1000)
201 self
.mount_a
.create_n_files("bravo/file", 1000)
203 # Flush the journals so that we have some backing store data
204 # belonging to one MDS, and some to the other MDS.
205 for mds_name
in active_mds_names
:
206 self
.fs
.mds_asok(["flush", "journal"], mds_name
)
208 # Stop (hard) the second MDS daemon
209 self
.fs
.mds_stop(active_mds_names
[1])
211 # Wipe out the tables for MDS rank 1 so that it is broken and can't start
212 # (this is the simulated failure that we will demonstrate that the disaster
213 # recovery tools can get us back from)
214 self
.fs
.erase_metadata_objects(prefix
="mds1_")
216 # Try to access files from the client
217 blocked_ls
= self
.mount_a
.run_shell(["ls", "-R"], wait
=False)
219 # Check that this "ls -R" blocked rather than completing: indicates
220 # it got stuck trying to access subtrees which were on the now-dead MDS.
221 log
.info("Sleeping to check ls is blocked...")
223 self
.assertFalse(blocked_ls
.finished
)
225 # This mount is now useless because it will depend on MDS rank 1, and MDS rank 1
226 # is not coming back. Kill it.
227 log
.info("Killing mount, it's blocked on the MDS we killed")
229 self
.mount_a
.kill_cleanup()
231 # Now that the mount is dead, the ls -R should error out.
233 except (CommandFailedError
, ConnectionLostError
):
234 # The ConnectionLostError case is for kernel client, where
235 # killing the mount also means killing the node.
238 # See that the second MDS will crash when it starts and tries to
240 damaged_id
= active_mds_names
[1]
241 self
.fs
.mds_restart(damaged_id
)
243 # The daemon taking the damaged rank should start starting, then
244 # restart back into standby after asking the mon to mark the rank
246 def is_marked_damaged():
247 mds_map
= self
.fs
.get_mds_map()
248 return 1 in mds_map
['damaged']
250 self
.wait_until_true(is_marked_damaged
, 60)
253 info
= self
.mds_cluster
.get_mds_info(damaged_id
)
254 return info
['state'] if info
is not None else None
256 self
.wait_until_equal(
261 self
.fs
.mds_stop(damaged_id
)
262 self
.fs
.mds_fail(damaged_id
)
264 # Now give up and go through a disaster recovery procedure
265 self
.fs
.mds_stop(active_mds_names
[0])
266 self
.fs
.mds_fail(active_mds_names
[0])
267 # Invoke recover_dentries quietly, because otherwise log spews millions of lines
268 self
.fs
.journal_tool(["event", "recover_dentries", "summary"], 0, quiet
=True)
269 self
.fs
.journal_tool(["event", "recover_dentries", "summary"], 1, quiet
=True)
270 self
.fs
.table_tool(["0", "reset", "session"])
271 self
.fs
.journal_tool(["journal", "reset"], 0)
272 self
.fs
.erase_mds_objects(1)
273 self
.fs
.mon_manager
.raw_cluster_cmd('fs', 'reset', self
.fs
.name
,
274 '--yes-i-really-mean-it')
276 # Bring an MDS back online, mount a client, and see that we can walk the full
277 # filesystem tree again
278 self
.fs
.mds_fail_restart(active_mds_names
[0])
279 self
.wait_until_equal(lambda: self
.fs
.get_active_names(), [active_mds_names
[0]], 30,
280 reject_fn
=lambda v
: len(v
) > 1)
282 self
.mount_a
.run_shell(["ls", "-R"], wait
=True)
284 def test_table_tool(self
):
285 active_mdss
= self
.fs
.get_active_names()
286 self
.assertEqual(len(active_mdss
), 1)
287 mds_name
= active_mdss
[0]
289 self
.mount_a
.run_shell(["touch", "foo"])
290 self
.fs
.mds_asok(["flush", "journal"], mds_name
)
292 log
.info(self
.fs
.table_tool(["all", "show", "inode"]))
293 log
.info(self
.fs
.table_tool(["all", "show", "snap"]))
294 log
.info(self
.fs
.table_tool(["all", "show", "session"]))
296 # Inode table should always be the same because initial state
297 # and choice of inode are deterministic.
298 # Should see one inode consumed
300 json
.loads(self
.fs
.table_tool(["all", "show", "inode"])),
306 {"start": 1099511628777,
307 "len": 1099511626775}],
309 {"start": 1099511628777,
310 "len": 1099511626775}]}},
315 # Should see one session
316 session_data
= json
.loads(self
.fs
.table_tool(
317 ["all", "show", "session"]))
318 self
.assertEqual(len(session_data
["0"]["data"]["sessions"]), 1)
319 self
.assertEqual(session_data
["0"]["result"], 0)
321 # Should see no snaps
323 json
.loads(self
.fs
.table_tool(["all", "show", "snap"])),
325 "snapserver": {"last_snap": 1,
331 "pending_update": [],
332 "pending_destroy": []},
337 for table
in ["session", "inode", "snap"]:
338 self
.fs
.table_tool(["all", "reset", table
])
340 log
.info(self
.fs
.table_tool(["all", "show", "inode"]))
341 log
.info(self
.fs
.table_tool(["all", "show", "snap"]))
342 log
.info(self
.fs
.table_tool(["all", "show", "session"]))
344 # Should see 0 sessions
345 session_data
= json
.loads(self
.fs
.table_tool(
346 ["all", "show", "session"]))
347 self
.assertEqual(len(session_data
["0"]["data"]["sessions"]), 0)
348 self
.assertEqual(session_data
["0"]["result"], 0)
350 # Should see entire inode range now marked free
352 json
.loads(self
.fs
.table_tool(["all", "show", "inode"])),
353 {"0": {"data": {"version": 1,
354 "inotable": {"projected_free": [
355 {"start": 1099511627776,
356 "len": 1099511627776}],
358 {"start": 1099511627776,
359 "len": 1099511627776}]}},
363 # Should see no snaps
365 json
.loads(self
.fs
.table_tool(["all", "show", "snap"])),
367 "snapserver": {"last_snap": 1,
373 "pending_update": [],
374 "pending_destroy": []},
378 def test_table_tool_take_inos(self
):
379 initial_range_start
= 1099511627776
380 initial_range_len
= 1099511627776
381 # Initially a completely clear range
383 json
.loads(self
.fs
.table_tool(["all", "show", "inode"])),
384 {"0": {"data": {"version": 0,
385 "inotable": {"projected_free": [
386 {"start": initial_range_start
,
387 "len": initial_range_len
}],
389 {"start": initial_range_start
,
390 "len": initial_range_len
}]}},
396 json
.loads(self
.fs
.table_tool(["all", "take_inos", "{0}".format(initial_range_start
+ 100)])),
397 {"0": {"data": {"version": 1,
398 "inotable": {"projected_free": [
399 {"start": initial_range_start
+ 101,
400 "len": initial_range_len
- 101}],
402 {"start": initial_range_start
+ 101,
403 "len": initial_range_len
- 101}]}},
407 @for_teuthology # Hack: "for_teuthology" because .sh doesn't work outside teuth
408 def test_journal_smoke(self
):
411 "client.{0}".format(self
.mount_a
.client_id
): [
412 "fs/misc/trivial_sync.sh"],
417 for mount
in self
.mounts
:
426 "client.{0}".format(self
.mount_a
.client_id
): [
427 "suites/cephfs_journal_tool_smoke.sh"],
434 self
.fs
.mds_restart()
435 self
.fs
.wait_for_daemons()
439 # trivial sync moutn a
442 "client.{0}".format(self
.mount_a
.client_id
): [
443 "fs/misc/trivial_sync.sh"],