+++ /dev/null
-import json
-import time
-import logging
-from textwrap import dedent
-import datetime
-import gevent
-import datetime
-
-from teuthology.orchestra.run import CommandFailedError, Raw
-from tasks.cephfs.cephfs_test_case import CephFSTestCase, for_teuthology
-
-log = logging.getLogger(__name__)
-
-
-class TestStrays(CephFSTestCase):
- MDSS_REQUIRED = 2
-
- OPS_THROTTLE = 1
- FILES_THROTTLE = 2
-
- # Range of different file sizes used in throttle test's workload
- throttle_workload_size_range = 16
-
- @for_teuthology
- def test_ops_throttle(self):
- self._test_throttling(self.OPS_THROTTLE)
-
- @for_teuthology
- def test_files_throttle(self):
- self._test_throttling(self.FILES_THROTTLE)
-
- def test_dir_deletion(self):
- """
- That when deleting a bunch of dentries and the containing
- directory, everything gets purged.
- Catches cases where the client might e.g. fail to trim
- the unlinked dir from its cache.
- """
- file_count = 1000
- create_script = dedent("""
- import os
-
- mount_path = "{mount_path}"
- subdir = "delete_me"
- size = {size}
- file_count = {file_count}
- os.mkdir(os.path.join(mount_path, subdir))
- for i in xrange(0, file_count):
- filename = "{{0}}_{{1}}.bin".format(i, size)
- f = open(os.path.join(mount_path, subdir, filename), 'w')
- f.write(size * 'x')
- f.close()
- """.format(
- mount_path=self.mount_a.mountpoint,
- size=1024,
- file_count=file_count
- ))
-
- self.mount_a.run_python(create_script)
-
- # That the dirfrag object is created
- self.fs.mds_asok(["flush", "journal"])
- dir_ino = self.mount_a.path_to_ino("delete_me")
- self.assertTrue(self.fs.dirfrag_exists(dir_ino, 0))
-
- # Remove everything
- self.mount_a.run_shell(["rm", "-rf", "delete_me"])
- self.fs.mds_asok(["flush", "journal"])
-
- # That all the removed files get created as strays
- strays = self.get_mdc_stat("strays_created")
- self.assertEqual(strays, file_count + 1)
-
- # That the strays all get enqueued for purge
- self.wait_until_equal(
- lambda: self.get_mdc_stat("strays_enqueued"),
- strays,
- timeout=600
-
- )
-
- # That all the purge operations execute
- self.wait_until_equal(
- lambda: self.get_stat("purge_queue", "pq_executed"),
- strays,
- timeout=600
- )
-
- # That finally, the directory metadata object is gone
- self.assertFalse(self.fs.dirfrag_exists(dir_ino, 0))
-
- # That finally, the data objects are all gone
- self.await_data_pool_empty()
-
- def _test_throttling(self, throttle_type):
- self.data_log = []
- try:
- return self._do_test_throttling(throttle_type)
- except:
- for l in self.data_log:
- log.info(",".join([l_.__str__() for l_ in l]))
- raise
-
- def _do_test_throttling(self, throttle_type):
- """
- That the mds_max_purge_ops setting is respected
- """
-
- def set_throttles(files, ops):
- """
- Helper for updating ops/files limits, and calculating effective
- ops_per_pg setting to give the same ops limit.
- """
- self.set_conf('mds', 'mds_max_purge_files', "%d" % files)
- self.set_conf('mds', 'mds_max_purge_ops', "%d" % ops)
-
- pgs = self.fs.mon_manager.get_pool_property(
- self.fs.get_data_pool_name(),
- "pg_num"
- )
- ops_per_pg = float(ops) / pgs
- self.set_conf('mds', 'mds_max_purge_ops_per_pg', "%s" % ops_per_pg)
-
- # Test conditions depend on what we're going to be exercising.
- # * Lift the threshold on whatever throttle we are *not* testing, so
- # that the throttle of interest is the one that will be the bottleneck
- # * Create either many small files (test file count throttling) or fewer
- # large files (test op throttling)
- if throttle_type == self.OPS_THROTTLE:
- set_throttles(files=100000000, ops=16)
- size_unit = 1024 * 1024 # big files, generate lots of ops
- file_multiplier = 100
- elif throttle_type == self.FILES_THROTTLE:
- # The default value of file limit is pretty permissive, so to avoid
- # the test running too fast, create lots of files and set the limit
- # pretty low.
- set_throttles(ops=100000000, files=6)
- size_unit = 1024 # small, numerous files
- file_multiplier = 200
- else:
- raise NotImplemented(throttle_type)
-
- # Pick up config changes
- self.fs.mds_fail_restart()
- self.fs.wait_for_daemons()
-
- create_script = dedent("""
- import os
-
- mount_path = "{mount_path}"
- subdir = "delete_me"
- size_unit = {size_unit}
- file_multiplier = {file_multiplier}
- os.mkdir(os.path.join(mount_path, subdir))
- for i in xrange(0, file_multiplier):
- for size in xrange(0, {size_range}*size_unit, size_unit):
- filename = "{{0}}_{{1}}.bin".format(i, size / size_unit)
- f = open(os.path.join(mount_path, subdir, filename), 'w')
- f.write(size * 'x')
- f.close()
- """.format(
- mount_path=self.mount_a.mountpoint,
- size_unit=size_unit,
- file_multiplier=file_multiplier,
- size_range=self.throttle_workload_size_range
- ))
-
- self.mount_a.run_python(create_script)
-
- # We will run the deletion in the background, to reduce the risk of it completing before
- # we have started monitoring the stray statistics.
- def background():
- self.mount_a.run_shell(["rm", "-rf", "delete_me"])
- self.fs.mds_asok(["flush", "journal"])
-
- background_thread = gevent.spawn(background)
-
- total_inodes = file_multiplier * self.throttle_workload_size_range + 1
- mds_max_purge_ops = int(self.fs.get_config("mds_max_purge_ops", 'mds'))
- mds_max_purge_files = int(self.fs.get_config("mds_max_purge_files", 'mds'))
-
- # During this phase we look for the concurrent ops to exceed half
- # the limit (a heuristic) and not exceed the limit (a correctness
- # condition).
- purge_timeout = 600
- elapsed = 0
- files_high_water = 0
- ops_high_water = 0
-
- while True:
- stats = self.fs.mds_asok(['perf', 'dump'])
- mdc_stats = stats['mds_cache']
- pq_stats = stats['purge_queue']
- if elapsed >= purge_timeout:
- raise RuntimeError("Timeout waiting for {0} inodes to purge, stats:{1}".format(total_inodes, mdc_stats))
-
- num_strays = mdc_stats['num_strays']
- num_strays_purging = pq_stats['pq_executing']
- num_purge_ops = pq_stats['pq_executing_ops']
-
- self.data_log.append([datetime.datetime.now(), num_strays, num_strays_purging, num_purge_ops])
-
- files_high_water = max(files_high_water, num_strays_purging)
- ops_high_water = max(ops_high_water, num_purge_ops)
-
- total_strays_created = mdc_stats['strays_created']
- total_strays_purged = pq_stats['pq_executed']
-
- if total_strays_purged == total_inodes:
- log.info("Complete purge in {0} seconds".format(elapsed))
- break
- elif total_strays_purged > total_inodes:
- raise RuntimeError("Saw more strays than expected, mdc stats: {0}".format(mdc_stats))
- else:
- if throttle_type == self.OPS_THROTTLE:
- # 11 is filer_max_purge_ops plus one for the backtrace:
- # limit is allowed to be overshot by this much.
- if num_purge_ops > mds_max_purge_ops + 11:
- raise RuntimeError("num_purge_ops violates threshold {0}/{1}".format(
- num_purge_ops, mds_max_purge_ops
- ))
- elif throttle_type == self.FILES_THROTTLE:
- if num_strays_purging > mds_max_purge_files:
- raise RuntimeError("num_strays_purging violates threshold {0}/{1}".format(
- num_strays_purging, mds_max_purge_files
- ))
- else:
- raise NotImplemented(throttle_type)
-
- log.info("Waiting for purge to complete {0}/{1}, {2}/{3}".format(
- num_strays_purging, num_strays,
- total_strays_purged, total_strays_created
- ))
- time.sleep(1)
- elapsed += 1
-
- background_thread.join()
-
- # Check that we got up to a respectable rate during the purge. This is totally
- # racy, but should be safeish unless the cluster is pathologically slow, or
- # insanely fast such that the deletions all pass before we have polled the
- # statistics.
- if throttle_type == self.OPS_THROTTLE:
- if ops_high_water < mds_max_purge_ops / 2:
- raise RuntimeError("Ops in flight high water is unexpectedly low ({0} / {1})".format(
- ops_high_water, mds_max_purge_ops
- ))
- elif throttle_type == self.FILES_THROTTLE:
- if files_high_water < mds_max_purge_files / 2:
- raise RuntimeError("Files in flight high water is unexpectedly low ({0} / {1})".format(
- ops_high_water, mds_max_purge_files
- ))
-
- # Sanity check all MDC stray stats
- stats = self.fs.mds_asok(['perf', 'dump'])
- mdc_stats = stats['mds_cache']
- pq_stats = stats['purge_queue']
- self.assertEqual(mdc_stats['num_strays'], 0)
- self.assertEqual(mdc_stats['num_strays_delayed'], 0)
- self.assertEqual(pq_stats['pq_executing'], 0)
- self.assertEqual(pq_stats['pq_executing_ops'], 0)
- self.assertEqual(mdc_stats['strays_created'], total_inodes)
- self.assertEqual(mdc_stats['strays_enqueued'], total_inodes)
- self.assertEqual(pq_stats['pq_executed'], total_inodes)
-
- def get_mdc_stat(self, name, mds_id=None):
- return self.get_stat("mds_cache", name, mds_id)
-
- def get_stat(self, subsys, name, mds_id=None):
- return self.fs.mds_asok(['perf', 'dump', subsys, name],
- mds_id=mds_id)[subsys][name]
-
- def _wait_for_counter(self, subsys, counter, expect_val, timeout=60,
- mds_id=None):
- self.wait_until_equal(
- lambda: self.get_stat(subsys, counter, mds_id),
- expect_val=expect_val, timeout=timeout,
- reject_fn=lambda x: x > expect_val
- )
-
- def test_open_inode(self):
- """
- That the case of a dentry unlinked while a client holds an
- inode open is handled correctly.
-
- The inode should be moved into a stray dentry, while the original
- dentry and directory should be purged.
-
- The inode's data should be purged when the client eventually closes
- it.
- """
- mount_a_client_id = self.mount_a.get_global_id()
-
- # Write some bytes to a file
- size_mb = 8
-
- # Hold the file open
- p = self.mount_a.open_background("open_file")
- self.mount_a.write_n_mb("open_file", size_mb)
- open_file_ino = self.mount_a.path_to_ino("open_file")
-
- self.assertEqual(self.get_session(mount_a_client_id)['num_caps'], 2)
-
- # Unlink the dentry
- self.mount_a.run_shell(["rm", "-f", "open_file"])
-
- # Wait to see the stray count increment
- self.wait_until_equal(
- lambda: self.get_mdc_stat("num_strays"),
- expect_val=1, timeout=60, reject_fn=lambda x: x > 1)
-
- # See that while the stray count has incremented, none have passed
- # on to the purge queue
- self.assertEqual(self.get_mdc_stat("strays_created"), 1)
- self.assertEqual(self.get_mdc_stat("strays_enqueued"), 0)
-
- # See that the client still holds 2 caps
- self.assertEqual(self.get_session(mount_a_client_id)['num_caps'], 2)
-
- # See that the data objects remain in the data pool
- self.assertTrue(self.fs.data_objects_present(open_file_ino, size_mb * 1024 * 1024))
-
- # Now close the file
- self.mount_a.kill_background(p)
-
- # Wait to see the client cap count decrement
- self.wait_until_equal(
- lambda: self.get_session(mount_a_client_id)['num_caps'],
- expect_val=1, timeout=60, reject_fn=lambda x: x > 2 or x < 1
- )
- # Wait to see the purge counter increment, stray count go to zero
- self._wait_for_counter("mds_cache", "strays_enqueued", 1)
- self.wait_until_equal(
- lambda: self.get_mdc_stat("num_strays"),
- expect_val=0, timeout=6, reject_fn=lambda x: x > 1
- )
- self._wait_for_counter("purge_queue", "pq_executed", 1)
-
- # See that the data objects no longer exist
- self.assertTrue(self.fs.data_objects_absent(open_file_ino, size_mb * 1024 * 1024))
-
- self.await_data_pool_empty()
-
- def test_hardlink_reintegration(self):
- """
- That removal of primary dentry of hardlinked inode results
- in reintegration of inode into the previously-remote dentry,
- rather than lingering as a stray indefinitely.
- """
- # Write some bytes to file_a
- size_mb = 8
- self.mount_a.run_shell(["mkdir", "dir_1"])
- self.mount_a.write_n_mb("dir_1/file_a", size_mb)
- ino = self.mount_a.path_to_ino("dir_1/file_a")
-
- # Create a hardlink named file_b
- self.mount_a.run_shell(["mkdir", "dir_2"])
- self.mount_a.run_shell(["ln", "dir_1/file_a", "dir_2/file_b"])
- self.assertEqual(self.mount_a.path_to_ino("dir_2/file_b"), ino)
-
- # Flush journal
- self.fs.mds_asok(['flush', 'journal'])
-
- # See that backtrace for the file points to the file_a path
- pre_unlink_bt = self.fs.read_backtrace(ino)
- self.assertEqual(pre_unlink_bt['ancestors'][0]['dname'], "file_a")
-
- # empty mds cache. otherwise mds reintegrates stray when unlink finishes
- self.mount_a.umount_wait()
- self.fs.mds_asok(['flush', 'journal'])
- self.fs.mds_fail_restart()
- self.fs.wait_for_daemons()
- self.mount_a.mount()
-
- # Unlink file_a
- self.mount_a.run_shell(["rm", "-f", "dir_1/file_a"])
-
- # See that a stray was created
- self.assertEqual(self.get_mdc_stat("num_strays"), 1)
- self.assertEqual(self.get_mdc_stat("strays_created"), 1)
-
- # Wait, see that data objects are still present (i.e. that the
- # stray did not advance to purging given time)
- time.sleep(30)
- self.assertTrue(self.fs.data_objects_present(ino, size_mb * 1024 * 1024))
- self.assertEqual(self.get_mdc_stat("strays_enqueued"), 0)
-
- # See that before reintegration, the inode's backtrace points to a stray dir
- self.fs.mds_asok(['flush', 'journal'])
- self.assertTrue(self.get_backtrace_path(ino).startswith("stray"))
-
- last_reintegrated = self.get_mdc_stat("strays_reintegrated")
-
- # Do a metadata operation on the remaining link (mv is heavy handed, but
- # others like touch may be satisfied from caps without poking MDS)
- self.mount_a.run_shell(["mv", "dir_2/file_b", "dir_2/file_c"])
-
- # Stray reintegration should happen as a result of the eval_remote call
- # on responding to a client request.
- self.wait_until_equal(
- lambda: self.get_mdc_stat("num_strays"),
- expect_val=0,
- timeout=60
- )
-
- # See the reintegration counter increment
- curr_reintegrated = self.get_mdc_stat("strays_reintegrated")
- self.assertGreater(curr_reintegrated, last_reintegrated)
- last_reintegrated = curr_reintegrated
-
- # Flush the journal
- self.fs.mds_asok(['flush', 'journal'])
-
- # See that the backtrace for the file points to the remaining link's path
- post_reint_bt = self.fs.read_backtrace(ino)
- self.assertEqual(post_reint_bt['ancestors'][0]['dname'], "file_c")
-
- # mds should reintegrates stray when unlink finishes
- self.mount_a.run_shell(["ln", "dir_2/file_c", "dir_2/file_d"])
- self.mount_a.run_shell(["rm", "-f", "dir_2/file_c"])
-
- # Stray reintegration should happen as a result of the notify_stray call
- # on completion of unlink
- self.wait_until_equal(
- lambda: self.get_mdc_stat("num_strays"),
- expect_val=0,
- timeout=60
- )
-
- # See the reintegration counter increment
- curr_reintegrated = self.get_mdc_stat("strays_reintegrated")
- self.assertGreater(curr_reintegrated, last_reintegrated)
- last_reintegrated = curr_reintegrated
-
- # Flush the journal
- self.fs.mds_asok(['flush', 'journal'])
-
- # See that the backtrace for the file points to the newest link's path
- post_reint_bt = self.fs.read_backtrace(ino)
- self.assertEqual(post_reint_bt['ancestors'][0]['dname'], "file_d")
-
- # Now really delete it
- self.mount_a.run_shell(["rm", "-f", "dir_2/file_d"])
- self._wait_for_counter("mds_cache", "strays_enqueued", 1)
- self._wait_for_counter("purge_queue", "pq_executed", 1)
-
- self.assert_purge_idle()
- self.assertTrue(self.fs.data_objects_absent(ino, size_mb * 1024 * 1024))
-
- # We caused the inode to go stray 3 times
- self.assertEqual(self.get_mdc_stat("strays_created"), 3)
- # We purged it at the last
- self.assertEqual(self.get_mdc_stat("strays_enqueued"), 1)
-
- def test_mv_hardlink_cleanup(self):
- """
- That when doing a rename from A to B, and B has hardlinks,
- then we make a stray for B which is then reintegrated
- into one of his hardlinks.
- """
- # Create file_a, file_b, and a hardlink to file_b
- size_mb = 8
- self.mount_a.write_n_mb("file_a", size_mb)
- file_a_ino = self.mount_a.path_to_ino("file_a")
-
- self.mount_a.write_n_mb("file_b", size_mb)
- file_b_ino = self.mount_a.path_to_ino("file_b")
-
- self.mount_a.run_shell(["ln", "file_b", "linkto_b"])
- self.assertEqual(self.mount_a.path_to_ino("linkto_b"), file_b_ino)
-
- # mv file_a file_b
- self.mount_a.run_shell(["mv", "file_a", "file_b"])
-
- # Stray reintegration should happen as a result of the notify_stray call on
- # completion of rename
- self.wait_until_equal(
- lambda: self.get_mdc_stat("num_strays"),
- expect_val=0,
- timeout=60
- )
-
- self.assertEqual(self.get_mdc_stat("strays_created"), 1)
- self.assertGreaterEqual(self.get_mdc_stat("strays_reintegrated"), 1)
-
- # No data objects should have been deleted, as both files still have linkage.
- self.assertTrue(self.fs.data_objects_present(file_a_ino, size_mb * 1024 * 1024))
- self.assertTrue(self.fs.data_objects_present(file_b_ino, size_mb * 1024 * 1024))
-
- self.fs.mds_asok(['flush', 'journal'])
-
- post_reint_bt = self.fs.read_backtrace(file_b_ino)
- self.assertEqual(post_reint_bt['ancestors'][0]['dname'], "linkto_b")
-
- def _setup_two_ranks(self):
- # Set up two MDSs
- self.fs.set_max_mds(2)
-
- # See that we have two active MDSs
- self.wait_until_equal(lambda: len(self.fs.get_active_names()), 2, 30,
- reject_fn=lambda v: v > 2 or v < 1)
-
- active_mds_names = self.fs.get_active_names()
- rank_0_id = active_mds_names[0]
- rank_1_id = active_mds_names[1]
- log.info("Ranks 0 and 1 are {0} and {1}".format(
- rank_0_id, rank_1_id))
-
- # Get rid of other MDS daemons so that it's easier to know which
- # daemons to expect in which ranks after restarts
- for unneeded_mds in set(self.mds_cluster.mds_ids) - {rank_0_id, rank_1_id}:
- self.mds_cluster.mds_stop(unneeded_mds)
- self.mds_cluster.mds_fail(unneeded_mds)
-
- return rank_0_id, rank_1_id
-
- def _force_migrate(self, to_id, path, watch_ino):
- """
- :param to_id: MDS id to move it to
- :param path: Filesystem path (string) to move
- :param watch_ino: Inode number to look for at destination to confirm move
- :return: None
- """
- self.mount_a.run_shell(["setfattr", "-n", "ceph.dir.pin", "-v", "1", path])
-
- # Poll the MDS cache dump to watch for the export completing
- migrated = False
- migrate_timeout = 60
- migrate_elapsed = 0
- while not migrated:
- data = self.fs.mds_asok(["dump", "cache"], to_id)
- for inode_data in data:
- if inode_data['ino'] == watch_ino:
- log.debug("Found ino in cache: {0}".format(json.dumps(inode_data, indent=2)))
- if inode_data['is_auth'] is True:
- migrated = True
- break
-
- if not migrated:
- if migrate_elapsed > migrate_timeout:
- raise RuntimeError("Migration hasn't happened after {0}s!".format(migrate_elapsed))
- else:
- migrate_elapsed += 1
- time.sleep(1)
-
- def _is_stopped(self, rank):
- mds_map = self.fs.get_mds_map()
- return rank not in [i['rank'] for i in mds_map['info'].values()]
-
- def test_purge_on_shutdown(self):
- """
- That when an MDS rank is shut down, its purge queue is
- drained in the process.
- """
- rank_0_id, rank_1_id = self._setup_two_ranks()
-
- self.set_conf("mds.{0}".format(rank_1_id), 'mds_max_purge_files', "0")
- self.mds_cluster.mds_fail_restart(rank_1_id)
- self.fs.wait_for_daemons()
-
- file_count = 5
-
- self.mount_a.create_n_files("delete_me/file", file_count)
-
- self._force_migrate(rank_1_id, "delete_me",
- self.mount_a.path_to_ino("delete_me/file_0"))
-
- self.mount_a.run_shell(["rm", "-rf", Raw("delete_me/*")])
- self.mount_a.umount_wait()
-
- # See all the strays go into purge queue
- self._wait_for_counter("mds_cache", "strays_created", file_count, mds_id=rank_1_id)
- self._wait_for_counter("mds_cache", "strays_enqueued", file_count, mds_id=rank_1_id)
- self.assertEqual(self.get_stat("mds_cache", "num_strays", mds_id=rank_1_id), 0)
-
- # See nothing get purged from the purge queue (yet)
- time.sleep(10)
- self.assertEqual(self.get_stat("purge_queue", "pq_executed", mds_id=rank_1_id), 0)
-
- # Shut down rank 1
- self.fs.set_max_mds(1)
- self.fs.deactivate(1)
-
- # It shouldn't proceed past stopping because its still not allowed
- # to purge
- time.sleep(10)
- self.assertEqual(self.get_stat("purge_queue", "pq_executed", mds_id=rank_1_id), 0)
- self.assertFalse(self._is_stopped(1))
-
- # Permit the daemon to start purging again
- self.fs.mon_manager.raw_cluster_cmd('tell', 'mds.{0}'.format(rank_1_id),
- 'injectargs',
- "--mds_max_purge_files 100")
-
- # It should now proceed through shutdown
- self.wait_until_true(
- lambda: self._is_stopped(1),
- timeout=60
- )
-
- # ...and in the process purge all that data
- self.await_data_pool_empty()
-
- def test_migration_on_shutdown(self):
- """
- That when an MDS rank is shut down, any non-purgeable strays
- get migrated to another rank.
- """
-
- rank_0_id, rank_1_id = self._setup_two_ranks()
-
- # Create a non-purgeable stray in a ~mds1 stray directory
- # by doing a hard link and deleting the original file
- self.mount_a.run_shell(["mkdir", "dir_1", "dir_2"])
- self.mount_a.run_shell(["touch", "dir_1/original"])
- self.mount_a.run_shell(["ln", "dir_1/original", "dir_2/linkto"])
-
- self._force_migrate(rank_1_id, "dir_1",
- self.mount_a.path_to_ino("dir_1/original"))
-
- # empty mds cache. otherwise mds reintegrates stray when unlink finishes
- self.mount_a.umount_wait()
- self.fs.mds_asok(['flush', 'journal'], rank_0_id)
- self.fs.mds_asok(['flush', 'journal'], rank_1_id)
- self.fs.mds_fail_restart()
- self.fs.wait_for_daemons()
-
- active_mds_names = self.fs.get_active_names()
- rank_0_id = active_mds_names[0]
- rank_1_id = active_mds_names[1]
-
- self.mount_a.mount()
-
- self.mount_a.run_shell(["rm", "-f", "dir_1/original"])
- self.mount_a.umount_wait()
-
- self._wait_for_counter("mds_cache", "strays_created", 1,
- mds_id=rank_1_id)
-
- # Shut down rank 1
- self.fs.mon_manager.raw_cluster_cmd_result('mds', 'set', "max_mds", "1")
- self.fs.mon_manager.raw_cluster_cmd_result('mds', 'deactivate', "1")
-
- # Wait til we get to a single active MDS mdsmap state
- self.wait_until_true(lambda: self._is_stopped(1), timeout=120)
-
- # See that the stray counter on rank 0 has incremented
- self.assertEqual(self.get_mdc_stat("strays_created", rank_0_id), 1)
-
- def assert_backtrace(self, ino, expected_path):
- """
- Assert that the backtrace in the data pool for an inode matches
- an expected /foo/bar path.
- """
- expected_elements = expected_path.strip("/").split("/")
- bt = self.fs.read_backtrace(ino)
- actual_elements = list(reversed([dn['dname'] for dn in bt['ancestors']]))
- self.assertListEqual(expected_elements, actual_elements)
-
- def get_backtrace_path(self, ino):
- bt = self.fs.read_backtrace(ino)
- elements = reversed([dn['dname'] for dn in bt['ancestors']])
- return "/".join(elements)
-
- def assert_purge_idle(self):
- """
- Assert that the MDS perf counters indicate no strays exist and
- no ongoing purge activity. Sanity check for when PurgeQueue should
- be idle.
- """
- mdc_stats = self.fs.mds_asok(['perf', 'dump', "mds_cache"])['mds_cache']
- pq_stats = self.fs.mds_asok(['perf', 'dump', "purge_queue"])['purge_queue']
- self.assertEqual(mdc_stats["num_strays"], 0)
- self.assertEqual(mdc_stats["num_strays_delayed"], 0)
- self.assertEqual(pq_stats["pq_executing"], 0)
- self.assertEqual(pq_stats["pq_executing_ops"], 0)
-
- def test_mv_cleanup(self):
- """
- That when doing a rename from A to B, and B has no hardlinks,
- then we make a stray for B and purge him.
- """
- # Create file_a and file_b, write some to both
- size_mb = 8
- self.mount_a.write_n_mb("file_a", size_mb)
- file_a_ino = self.mount_a.path_to_ino("file_a")
- self.mount_a.write_n_mb("file_b", size_mb)
- file_b_ino = self.mount_a.path_to_ino("file_b")
-
- self.fs.mds_asok(['flush', 'journal'])
- self.assert_backtrace(file_a_ino, "file_a")
- self.assert_backtrace(file_b_ino, "file_b")
-
- # mv file_a file_b
- self.mount_a.run_shell(['mv', 'file_a', 'file_b'])
-
- # See that stray counter increments
- self.assertEqual(self.get_mdc_stat("strays_created"), 1)
- # Wait for purge counter to increment
- self._wait_for_counter("mds_cache", "strays_enqueued", 1)
- self._wait_for_counter("purge_queue", "pq_executed", 1)
-
- self.assert_purge_idle()
-
- # file_b should have been purged
- self.assertTrue(self.fs.data_objects_absent(file_b_ino, size_mb * 1024 * 1024))
-
- # Backtrace should have updated from file_a to file_b
- self.fs.mds_asok(['flush', 'journal'])
- self.assert_backtrace(file_a_ino, "file_b")
-
- # file_a's data should still exist
- self.assertTrue(self.fs.data_objects_present(file_a_ino, size_mb * 1024 * 1024))
-
- def _pool_df(self, pool_name):
- """
- Return a dict like
- {
- "kb_used": 0,
- "bytes_used": 0,
- "max_avail": 19630292406,
- "objects": 0
- }
-
- :param pool_name: Which pool (must exist)
- """
- out = self.fs.mon_manager.raw_cluster_cmd("df", "--format=json-pretty")
- for p in json.loads(out)['pools']:
- if p['name'] == pool_name:
- return p['stats']
-
- raise RuntimeError("Pool '{0}' not found".format(pool_name))
-
- def await_data_pool_empty(self):
- self.wait_until_true(
- lambda: self._pool_df(
- self.fs.get_data_pool_name()
- )['objects'] == 0,
- timeout=60)
-
- def test_snapshot_remove(self):
- """
- That removal of a snapshot that references a now-unlinked file results
- in purging on the stray for the file.
- """
- # Enable snapshots
- self.fs.mon_manager.raw_cluster_cmd("mds", "set", "allow_new_snaps", "true",
- "--yes-i-really-mean-it")
-
- # Create a dir with a file in it
- size_mb = 8
- self.mount_a.run_shell(["mkdir", "snapdir"])
- self.mount_a.run_shell(["mkdir", "snapdir/subdir"])
- self.mount_a.write_test_pattern("snapdir/subdir/file_a", size_mb * 1024 * 1024)
- file_a_ino = self.mount_a.path_to_ino("snapdir/subdir/file_a")
-
- # Snapshot the dir
- self.mount_a.run_shell(["mkdir", "snapdir/.snap/snap1"])
-
- # Cause the head revision to deviate from the snapshot
- self.mount_a.write_n_mb("snapdir/subdir/file_a", size_mb)
-
- # Flush the journal so that backtraces, dirfrag objects will actually be written
- self.fs.mds_asok(["flush", "journal"])
-
- # Unlink the file
- self.mount_a.run_shell(["rm", "-f", "snapdir/subdir/file_a"])
- self.mount_a.run_shell(["rmdir", "snapdir/subdir"])
-
- # Unmount the client because when I come back to check the data is still
- # in the file I don't want to just see what's in the page cache.
- self.mount_a.umount_wait()
-
- self.assertEqual(self.get_mdc_stat("strays_created"), 2)
-
- # FIXME: at this stage we see a purge and the stray count drops to
- # zero, but there's actually still a stray, so at the very
- # least the StrayManager stats code is slightly off
-
- self.mount_a.mount()
-
- # See that the data from the snapshotted revision of the file is still present
- # and correct
- self.mount_a.validate_test_pattern("snapdir/.snap/snap1/subdir/file_a", size_mb * 1024 * 1024)
-
- # Remove the snapshot
- self.mount_a.run_shell(["rmdir", "snapdir/.snap/snap1"])
-
- # Purging file_a doesn't happen until after we've flushed the journal, because
- # it is referenced by the snapshotted subdir, and the snapshot isn't really
- # gone until the journal references to it are gone
- self.fs.mds_asok(["flush", "journal"])
-
- # Wait for purging to complete, which requires the OSDMap to propagate to the OSDs.
- # See also: http://tracker.ceph.com/issues/20072
- self.wait_until_true(
- lambda: self.fs.data_objects_absent(file_a_ino, size_mb * 1024 * 1024),
- timeout=60
- )
-
- # See that a purge happens now
- self._wait_for_counter("mds_cache", "strays_enqueued", 2)
- self._wait_for_counter("purge_queue", "pq_executed", 2)
-
- self.await_data_pool_empty()
-
- def test_fancy_layout(self):
- """
- purge stray file with fancy layout
- """
-
- file_name = "fancy_layout_file"
- self.mount_a.run_shell(["touch", file_name])
-
- file_layout = "stripe_unit=1048576 stripe_count=4 object_size=8388608"
- self.mount_a.setfattr(file_name, "ceph.file.layout", file_layout)
-
- # 35MB requires 7 objects
- size_mb = 35
- self.mount_a.write_n_mb(file_name, size_mb)
-
- self.mount_a.run_shell(["rm", "-f", file_name])
- self.fs.mds_asok(["flush", "journal"])
-
- # can't use self.fs.data_objects_absent here, it does not support fancy layout
- self.await_data_pool_empty()
-
- def test_dirfrag_limit(self):
- """
- That the directory fragment size cannot exceed mds_bal_fragment_size_max (using a limit of 50 in all configurations).
-
- That fragmentation (forced) will allow more entries to be created.
-
- That unlinking fails when the stray directory fragment becomes too large and that unlinking may continue once those strays are purged.
- """
-
- self.fs.set_allow_dirfrags(True)
-
- LOW_LIMIT = 50
- for mds in self.fs.get_daemon_names():
- self.fs.mds_asok(["config", "set", "mds_bal_fragment_size_max", str(LOW_LIMIT)], mds)
-
- try:
- self.mount_a.run_python(dedent("""
- import os
- path = os.path.join("{path}", "subdir")
- os.mkdir(path)
- for n in range(0, {file_count}):
- open(os.path.join(path, "%s" % n), 'w').write("%s" % n)
- """.format(
- path=self.mount_a.mountpoint,
- file_count=LOW_LIMIT+1
- )))
- except CommandFailedError:
- pass # ENOSPAC
- else:
- raise RuntimeError("fragment size exceeded")
-
- # Now test that we can go beyond the limit if we fragment the directory
-
- self.mount_a.run_python(dedent("""
- import os
- path = os.path.join("{path}", "subdir2")
- os.mkdir(path)
- for n in range(0, {file_count}):
- open(os.path.join(path, "%s" % n), 'w').write("%s" % n)
- dfd = os.open(path, os.O_DIRECTORY)
- os.fsync(dfd)
- """.format(
- path=self.mount_a.mountpoint,
- file_count=LOW_LIMIT
- )))
-
- # Ensure that subdir2 is fragmented
- mds_id = self.fs.get_active_names()[0]
- self.fs.mds_asok(["dirfrag", "split", "/subdir2", "0/0", "1"], mds_id)
-
- # remount+flush (release client caps)
- self.mount_a.umount_wait()
- self.fs.mds_asok(["flush", "journal"], mds_id)
- self.mount_a.mount()
- self.mount_a.wait_until_mounted()
-
- # Create 50% more files than the current fragment limit
- self.mount_a.run_python(dedent("""
- import os
- path = os.path.join("{path}", "subdir2")
- for n in range({file_count}, ({file_count}*3)//2):
- open(os.path.join(path, "%s" % n), 'w').write("%s" % n)
- """.format(
- path=self.mount_a.mountpoint,
- file_count=LOW_LIMIT
- )))
-
- # Now test the stray directory size is limited and recovers
- strays_before = self.get_mdc_stat("strays_created")
- try:
- self.mount_a.run_python(dedent("""
- import os
- path = os.path.join("{path}", "subdir3")
- os.mkdir(path)
- for n in range({file_count}):
- fpath = os.path.join(path, "%s" % n)
- f = open(fpath, 'w')
- f.write("%s" % n)
- f.close()
- os.unlink(fpath)
- """.format(
- path=self.mount_a.mountpoint,
- file_count=LOW_LIMIT*10 # 10 stray directories, should collide before this count
- )))
- except CommandFailedError:
- pass # ENOSPAC
- else:
- raise RuntimeError("fragment size exceeded")
-
- strays_after = self.get_mdc_stat("strays_created")
- self.assertGreaterEqual(strays_after-strays_before, LOW_LIMIT)
-
- self._wait_for_counter("mds_cache", "strays_enqueued", strays_after)
- self._wait_for_counter("purge_queue", "pq_executed", strays_after)
-
- self.mount_a.run_python(dedent("""
- import os
- path = os.path.join("{path}", "subdir4")
- os.mkdir(path)
- for n in range({file_count}):
- fpath = os.path.join(path, "%s" % n)
- f = open(fpath, 'w')
- f.write("%s" % n)
- f.close()
- os.unlink(fpath)
- """.format(
- path=self.mount_a.mountpoint,
- file_count=LOW_LIMIT
- )))
-
- def test_purge_queue_upgrade(self):
- """
- That when starting on a system with no purge queue in the metadata
- pool, we silently create one.
- :return:
- """
-
- self.mds_cluster.mds_stop()
- self.mds_cluster.mds_fail()
- self.fs.rados(["rm", "500.00000000"])
- self.mds_cluster.mds_restart()
- self.fs.wait_for_daemons()
-
- def test_purge_queue_op_rate(self):
- """
- A busy purge queue is meant to aggregate operations sufficiently
- that our RADOS ops to the metadata pool are not O(files). Check
- that that is so.
- :return:
- """
-
- # For low rates of deletion, the rate of metadata ops actually
- # will be o(files), so to see the desired behaviour we have to give
- # the system a significant quantity, i.e. an order of magnitude
- # more than the number of files it will purge at one time.
-
- max_purge_files = 2
-
- self.set_conf('mds', 'mds_bal_frag', 'false')
- self.set_conf('mds', 'mds_max_purge_files', "%d" % max_purge_files)
- self.fs.mds_fail_restart()
- self.fs.wait_for_daemons()
-
- phase_1_files = 256
- phase_2_files = 512
-
- self.mount_a.run_shell(["mkdir", "phase1"])
- self.mount_a.create_n_files("phase1/file", phase_1_files)
-
- self.mount_a.run_shell(["mkdir", "phase2"])
- self.mount_a.create_n_files("phase2/file", phase_2_files)
-
- def unlink_and_count_ops(path, expected_deletions):
- initial_ops = self.get_stat("objecter", "op")
- initial_pq_executed = self.get_stat("purge_queue", "pq_executed")
-
- self.mount_a.run_shell(["rm", "-rf", path])
-
- self._wait_for_counter(
- "purge_queue", "pq_executed", initial_pq_executed + expected_deletions
- )
-
- final_ops = self.get_stat("objecter", "op")
-
- # Calculation of the *overhead* operations, i.e. do not include
- # the operations where we actually delete files.
- return final_ops - initial_ops - expected_deletions
-
- self.fs.mds_asok(['flush', 'journal'])
- phase1_ops = unlink_and_count_ops("phase1/", phase_1_files + 1)
-
- self.fs.mds_asok(['flush', 'journal'])
- phase2_ops = unlink_and_count_ops("phase2/", phase_2_files + 1)
-
- log.info("Phase 1: {0}".format(phase1_ops))
- log.info("Phase 2: {0}".format(phase2_ops))
-
- # The success criterion is that deleting double the number
- # of files doesn't generate double the number of overhead ops
- # -- this comparison is a rough approximation of that rule.
- self.assertTrue(phase2_ops < phase1_ops * 1.25)
-
- # Finally, check that our activity did include properly quiescing
- # the queue (i.e. call to Journaler::write_head in the right place),
- # by restarting the MDS and checking that it doesn't try re-executing
- # any of the work we did.
- self.fs.mds_asok(['flush', 'journal']) # flush to ensure no strays
- # hanging around
- self.fs.mds_fail_restart()
- self.fs.wait_for_daemons()
- time.sleep(10)
- self.assertEqual(self.get_stat("purge_queue", "pq_executed"), 0)
-
- def test_replicated_delete_speed(self):
- """
- That deletions of replicated metadata are not pathologically slow
- """
- rank_0_id, rank_1_id = self._setup_two_ranks()
-
- self.set_conf("mds.{0}".format(rank_1_id), 'mds_max_purge_files', "0")
- self.mds_cluster.mds_fail_restart(rank_1_id)
- self.fs.wait_for_daemons()
-
- file_count = 10
-
- self.mount_a.create_n_files("delete_me/file", file_count)
-
- self._force_migrate(rank_1_id, "delete_me",
- self.mount_a.path_to_ino("delete_me/file_0"))
-
- begin = datetime.datetime.now()
- self.mount_a.run_shell(["rm", "-rf", Raw("delete_me/*")])
- end = datetime.datetime.now()
-
- # What we're really checking here is that we are completing client
- # operations immediately rather than delaying until the next tick.
- tick_period = float(self.fs.get_config("mds_tick_interval",
- service_type="mds"))
-
- duration = (end - begin).total_seconds()
- self.assertLess(duration, (file_count * tick_period) * 0.25)
-
Code Review / stor4nfv.git / blobdiff