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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
commit19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch)
tree42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /qa/tasks/cephfs/test_failover.py
parentInitial commit. (diff)
downloadceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz
ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'qa/tasks/cephfs/test_failover.py')
-rw-r--r--qa/tasks/cephfs/test_failover.py800
1 files changed, 800 insertions, 0 deletions
diff --git a/qa/tasks/cephfs/test_failover.py b/qa/tasks/cephfs/test_failover.py
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+++ b/qa/tasks/cephfs/test_failover.py
@@ -0,0 +1,800 @@
+import time
+import signal
+import logging
+import operator
+from random import randint
+
+from tasks.cephfs.cephfs_test_case import CephFSTestCase
+from teuthology.exceptions import CommandFailedError
+from tasks.cephfs.fuse_mount import FuseMount
+
+log = logging.getLogger(__name__)
+
+class TestClusterAffinity(CephFSTestCase):
+ CLIENTS_REQUIRED = 0
+ MDSS_REQUIRED = 4
+
+ def _verify_join_fs(self, target, status=None):
+ if status is None:
+ status = self.fs.wait_for_daemons(timeout=30)
+ log.debug("%s", status)
+ target = sorted(target, key=operator.itemgetter('name'))
+ log.info("target = %s", target)
+ current = list(status.get_all())
+ current = sorted(current, key=operator.itemgetter('name'))
+ log.info("current = %s", current)
+ self.assertEqual(len(current), len(target))
+ for i in range(len(current)):
+ for attr in target[i]:
+ self.assertIn(attr, current[i])
+ self.assertEqual(target[i][attr], current[i][attr])
+
+ def _change_target_state(self, state, name, changes):
+ for entity in state:
+ if entity['name'] == name:
+ for k, v in changes.items():
+ entity[k] = v
+ return
+ self.fail("no entity")
+
+ def _verify_init(self):
+ status = self.fs.status()
+ log.info("status = {0}".format(status))
+ target = [{'join_fscid': -1, 'name': info['name']} for info in status.get_all()]
+ self._verify_join_fs(target, status=status)
+ return (status, target)
+
+ def _reach_target(self, target):
+ def takeover():
+ try:
+ self._verify_join_fs(target)
+ return True
+ except AssertionError as e:
+ log.debug("%s", e)
+ return False
+ self.wait_until_true(takeover, 30)
+
+ def test_join_fs_runtime(self):
+ """
+ That setting mds_join_fs at runtime affects the cluster layout.
+ """
+ status, target = self._verify_init()
+ standbys = list(status.get_standbys())
+ self.config_set('mds.'+standbys[0]['name'], 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, standbys[0]['name'], {'join_fscid': self.fs.id, 'state': 'up:active'})
+ self._reach_target(target)
+
+ def test_join_fs_unset(self):
+ """
+ That unsetting mds_join_fs will cause failover if another high-affinity standby exists.
+ """
+ status, target = self._verify_init()
+ standbys = list(status.get_standbys())
+ names = (standbys[0]['name'], standbys[1]['name'])
+ self.config_set('mds.'+names[0], 'mds_join_fs', 'cephfs')
+ self.config_set('mds.'+names[1], 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, names[0], {'join_fscid': self.fs.id})
+ self._change_target_state(target, names[1], {'join_fscid': self.fs.id})
+ self._reach_target(target)
+ status = self.fs.status()
+ active = self.fs.get_active_names(status=status)[0]
+ self.assertIn(active, names)
+ self.config_rm('mds.'+active, 'mds_join_fs')
+ self._change_target_state(target, active, {'join_fscid': -1})
+ new_active = (set(names) - set((active,))).pop()
+ self._change_target_state(target, new_active, {'state': 'up:active'})
+ self._reach_target(target)
+
+ def test_join_fs_drop(self):
+ """
+ That unsetting mds_join_fs will not cause failover if no high-affinity standby exists.
+ """
+ status, target = self._verify_init()
+ standbys = list(status.get_standbys())
+ active = standbys[0]['name']
+ self.config_set('mds.'+active, 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, active, {'join_fscid': self.fs.id, 'state': 'up:active'})
+ self._reach_target(target)
+ self.config_rm('mds.'+active, 'mds_join_fs')
+ self._change_target_state(target, active, {'join_fscid': -1})
+ self._reach_target(target)
+
+ def test_join_fs_vanilla(self):
+ """
+ That a vanilla standby is preferred over others with mds_join_fs set to another fs.
+ """
+ # After Octopus is EOL, we can remove this setting:
+ self.fs.set_allow_multifs()
+ fs2 = self.mds_cluster.newfs(name="cephfs2")
+ status, target = self._verify_init()
+ active = self.fs.get_active_names(status=status)[0]
+ standbys = [info['name'] for info in status.get_standbys()]
+ victim = standbys.pop()
+ # Set a bogus fs on the others
+ for mds in standbys:
+ self.config_set('mds.'+mds, 'mds_join_fs', 'cephfs2')
+ self._change_target_state(target, mds, {'join_fscid': fs2.id})
+ self.fs.rank_fail()
+ self._change_target_state(target, victim, {'state': 'up:active'})
+ self._reach_target(target)
+ status = self.fs.status()
+ active = self.fs.get_active_names(status=status)[0]
+ self.assertEqual(active, victim)
+
+ def test_join_fs_last_resort(self):
+ """
+ That a standby with mds_join_fs set to another fs is still used if necessary.
+ """
+ status, target = self._verify_init()
+ standbys = [info['name'] for info in status.get_standbys()]
+ for mds in standbys:
+ self.config_set('mds.'+mds, 'mds_join_fs', 'cephfs2')
+ # After Octopus is EOL, we can remove this setting:
+ self.fs.set_allow_multifs()
+ fs2 = self.mds_cluster.newfs(name="cephfs2")
+ for mds in standbys:
+ self._change_target_state(target, mds, {'join_fscid': fs2.id})
+ self.fs.rank_fail()
+ status = self.fs.status()
+ ranks = list(self.fs.get_ranks(status=status))
+ self.assertEqual(len(ranks), 1)
+ self.assertIn(ranks[0]['name'], standbys)
+ # Note that we would expect the former active to reclaim its spot, but
+ # we're not testing that here.
+
+ def test_join_fs_steady(self):
+ """
+ That a sole MDS with mds_join_fs set will come back as active eventually even after failover.
+ """
+ status, target = self._verify_init()
+ active = self.fs.get_active_names(status=status)[0]
+ self.config_set('mds.'+active, 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, active, {'join_fscid': self.fs.id})
+ self._reach_target(target)
+ self.fs.rank_fail()
+ self._reach_target(target)
+
+ def test_join_fs_standby_replay(self):
+ """
+ That a standby-replay daemon with weak affinity is replaced by a stronger one.
+ """
+ status, target = self._verify_init()
+ standbys = [info['name'] for info in status.get_standbys()]
+ self.config_set('mds.'+standbys[0], 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, standbys[0], {'join_fscid': self.fs.id, 'state': 'up:active'})
+ self._reach_target(target)
+ self.fs.set_allow_standby_replay(True)
+ status = self.fs.status()
+ standbys = [info['name'] for info in status.get_standbys()]
+ self.config_set('mds.'+standbys[0], 'mds_join_fs', 'cephfs')
+ self._change_target_state(target, standbys[0], {'join_fscid': self.fs.id, 'state': 'up:standby-replay'})
+ self._reach_target(target)
+
+class TestClusterResize(CephFSTestCase):
+ CLIENTS_REQUIRED = 0
+ MDSS_REQUIRED = 3
+
+ def test_grow(self):
+ """
+ That the MDS cluster grows after increasing max_mds.
+ """
+
+ # Need all my standbys up as well as the active daemons
+ # self.wait_for_daemon_start() necessary?
+
+ self.fs.grow(2)
+ self.fs.grow(3)
+
+
+ def test_shrink(self):
+ """
+ That the MDS cluster shrinks automatically after decreasing max_mds.
+ """
+
+ self.fs.grow(3)
+ self.fs.shrink(1)
+
+ def test_up_less_than_max(self):
+ """
+ That a health warning is generated when max_mds is greater than active count.
+ """
+
+ status = self.fs.status()
+ mdss = [info['gid'] for info in status.get_all()]
+ self.fs.set_max_mds(len(mdss)+1)
+ self.wait_for_health("MDS_UP_LESS_THAN_MAX", 30)
+ self.fs.shrink(2)
+ self.wait_for_health_clear(30)
+
+ def test_down_health(self):
+ """
+ That marking a FS down does not generate a health warning
+ """
+
+ self.fs.set_down()
+ try:
+ self.wait_for_health("", 30)
+ raise RuntimeError("got health warning?")
+ except RuntimeError as e:
+ if "Timed out after" in str(e):
+ pass
+ else:
+ raise
+
+ def test_down_twice(self):
+ """
+ That marking a FS down twice does not wipe old_max_mds.
+ """
+
+ self.fs.grow(2)
+ self.fs.set_down()
+ self.fs.wait_for_daemons()
+ self.fs.set_down(False)
+ self.assertEqual(self.fs.get_var("max_mds"), 2)
+ self.fs.wait_for_daemons(timeout=60)
+
+ def test_down_grow(self):
+ """
+ That setting max_mds undoes down.
+ """
+
+ self.fs.set_down()
+ self.fs.wait_for_daemons()
+ self.fs.grow(2)
+ self.fs.wait_for_daemons()
+
+ def test_down(self):
+ """
+ That down setting toggles and sets max_mds appropriately.
+ """
+
+ self.fs.set_down()
+ self.fs.wait_for_daemons()
+ self.assertEqual(self.fs.get_var("max_mds"), 0)
+ self.fs.set_down(False)
+ self.assertEqual(self.fs.get_var("max_mds"), 1)
+ self.fs.wait_for_daemons()
+ self.assertEqual(self.fs.get_var("max_mds"), 1)
+
+ def test_hole(self):
+ """
+ Test that a hole cannot be created in the FS ranks.
+ """
+
+ fscid = self.fs.id
+
+ self.fs.grow(2)
+
+ # Now add a delay which should slow down how quickly rank 1 stops
+ self.config_set('mds', 'ms_inject_delay_max', '5.0')
+ self.config_set('mds', 'ms_inject_delay_probability', '1.0')
+ self.fs.set_max_mds(1)
+ log.info("status = {0}".format(self.fs.status()))
+
+ # Don't wait for rank 1 to stop
+ self.fs.set_max_mds(3)
+ log.info("status = {0}".format(self.fs.status()))
+
+ # Now check that the mons didn't try to promote a standby to rank 2
+ self.fs.set_max_mds(2)
+ status = self.fs.status()
+ try:
+ status = self.fs.wait_for_daemons(timeout=90)
+ ranks = set([info['rank'] for info in status.get_ranks(fscid)])
+ self.assertEqual(ranks, set([0, 1]))
+ finally:
+ log.info("status = {0}".format(status))
+
+ def test_thrash(self):
+ """
+ Test that thrashing max_mds does not fail.
+ """
+
+ max_mds = 2
+ for i in range(0, 100):
+ self.fs.set_max_mds(max_mds)
+ max_mds = (max_mds+1)%3+1
+
+ self.fs.wait_for_daemons(timeout=90)
+
+class TestFailover(CephFSTestCase):
+ CLIENTS_REQUIRED = 1
+ MDSS_REQUIRED = 2
+
+ def test_simple(self):
+ """
+ That when the active MDS is killed, a standby MDS is promoted into
+ its rank after the grace period.
+
+ This is just a simple unit test, the harder cases are covered
+ in thrashing tests.
+ """
+
+ # Need all my standbys up as well as the active daemons
+ self.wait_for_daemon_start()
+
+ (original_active, ) = self.fs.get_active_names()
+ original_standbys = self.mds_cluster.get_standby_daemons()
+
+ # Kill the rank 0 daemon's physical process
+ self.fs.mds_stop(original_active)
+
+ grace = float(self.fs.get_config("mds_beacon_grace", service_type="mon"))
+
+ # Wait until the monitor promotes his replacement
+ def promoted():
+ active = self.fs.get_active_names()
+ return active and active[0] in original_standbys
+
+ log.info("Waiting for promotion of one of the original standbys {0}".format(
+ original_standbys))
+ self.wait_until_true(
+ promoted,
+ timeout=grace*2)
+
+ # Start the original rank 0 daemon up again, see that he becomes a standby
+ self.fs.mds_restart(original_active)
+ self.wait_until_true(
+ lambda: original_active in self.mds_cluster.get_standby_daemons(),
+ timeout=60 # Approximately long enough for MDS to start and mon to notice
+ )
+
+ def test_client_abort(self):
+ """
+ That a client will respect fuse_require_active_mds and error out
+ when the cluster appears to be unavailable.
+ """
+
+ if not isinstance(self.mount_a, FuseMount):
+ self.skipTest("Requires FUSE client to inject client metadata")
+
+ require_active = self.fs.get_config("fuse_require_active_mds", service_type="mon").lower() == "true"
+ if not require_active:
+ self.skipTest("fuse_require_active_mds is not set")
+
+ grace = float(self.fs.get_config("mds_beacon_grace", service_type="mon"))
+
+ # Check it's not laggy to begin with
+ (original_active, ) = self.fs.get_active_names()
+ self.assertNotIn("laggy_since", self.fs.status().get_mds(original_active))
+
+ self.mounts[0].umount_wait()
+
+ # Control: that we can mount and unmount usually, while the cluster is healthy
+ self.mounts[0].mount_wait()
+ self.mounts[0].umount_wait()
+
+ # Stop the daemon processes
+ self.fs.mds_stop()
+
+ # Wait for everyone to go laggy
+ def laggy():
+ mdsmap = self.fs.get_mds_map()
+ for info in mdsmap['info'].values():
+ if "laggy_since" not in info:
+ return False
+
+ return True
+
+ self.wait_until_true(laggy, grace * 2)
+ with self.assertRaises(CommandFailedError):
+ self.mounts[0].mount_wait()
+
+ def test_standby_count_wanted(self):
+ """
+ That cluster health warnings are generated by insufficient standbys available.
+ """
+
+ # Need all my standbys up as well as the active daemons
+ self.wait_for_daemon_start()
+
+ grace = float(self.fs.get_config("mds_beacon_grace", service_type="mon"))
+
+ standbys = self.mds_cluster.get_standby_daemons()
+ self.assertGreaterEqual(len(standbys), 1)
+ self.fs.mon_manager.raw_cluster_cmd('fs', 'set', self.fs.name, 'standby_count_wanted', str(len(standbys)))
+
+ # Kill a standby and check for warning
+ victim = standbys.pop()
+ self.fs.mds_stop(victim)
+ log.info("waiting for insufficient standby daemon warning")
+ self.wait_for_health("MDS_INSUFFICIENT_STANDBY", grace*2)
+
+ # restart the standby, see that he becomes a standby, check health clears
+ self.fs.mds_restart(victim)
+ self.wait_until_true(
+ lambda: victim in self.mds_cluster.get_standby_daemons(),
+ timeout=60 # Approximately long enough for MDS to start and mon to notice
+ )
+ self.wait_for_health_clear(timeout=30)
+
+ # Set it one greater than standbys ever seen
+ standbys = self.mds_cluster.get_standby_daemons()
+ self.assertGreaterEqual(len(standbys), 1)
+ self.fs.mon_manager.raw_cluster_cmd('fs', 'set', self.fs.name, 'standby_count_wanted', str(len(standbys)+1))
+ log.info("waiting for insufficient standby daemon warning")
+ self.wait_for_health("MDS_INSUFFICIENT_STANDBY", grace*2)
+
+ # Set it to 0
+ self.fs.mon_manager.raw_cluster_cmd('fs', 'set', self.fs.name, 'standby_count_wanted', '0')
+ self.wait_for_health_clear(timeout=30)
+
+ def test_discontinuous_mdsmap(self):
+ """
+ That discontinuous mdsmap does not affect failover.
+ See http://tracker.ceph.com/issues/24856.
+ """
+ self.fs.set_max_mds(2)
+ status = self.fs.wait_for_daemons()
+
+ self.mount_a.umount_wait()
+
+ grace = float(self.fs.get_config("mds_beacon_grace", service_type="mon"))
+ monc_timeout = float(self.fs.get_config("mon_client_ping_timeout", service_type="mds"))
+
+ mds_0 = self.fs.get_rank(rank=0, status=status)
+ self.fs.rank_freeze(True, rank=0) # prevent failover
+ self.fs.rank_signal(signal.SIGSTOP, rank=0, status=status)
+ self.wait_until_true(
+ lambda: "laggy_since" in self.fs.get_rank(),
+ timeout=grace * 2
+ )
+
+ self.fs.rank_fail(rank=1)
+ self.fs.wait_for_state('up:resolve', rank=1, timeout=30)
+
+ # Make sure of mds_0's monitor connection gets reset
+ time.sleep(monc_timeout * 2)
+
+ # Continue rank 0, it will get discontinuous mdsmap
+ self.fs.rank_signal(signal.SIGCONT, rank=0)
+ self.wait_until_true(
+ lambda: "laggy_since" not in self.fs.get_rank(rank=0),
+ timeout=grace * 2
+ )
+
+ # mds.b will be stuck at 'reconnect' state if snapserver gets confused
+ # by discontinuous mdsmap
+ self.fs.wait_for_state('up:active', rank=1, timeout=30)
+ self.assertEqual(mds_0['gid'], self.fs.get_rank(rank=0)['gid'])
+ self.fs.rank_freeze(False, rank=0)
+
+ def test_connect_bootstrapping(self):
+ self.config_set("mds", "mds_sleep_rank_change", 10000000.0)
+ self.config_set("mds", "mds_connect_bootstrapping", True)
+ self.fs.set_max_mds(2)
+ self.fs.wait_for_daemons()
+ self.fs.rank_fail(rank=0)
+ # rank 0 will get stuck in up:resolve, see https://tracker.ceph.com/issues/53194
+ self.fs.wait_for_daemons()
+
+
+class TestStandbyReplay(CephFSTestCase):
+ CLIENTS_REQUIRED = 0
+ MDSS_REQUIRED = 4
+
+ def _confirm_no_replay(self):
+ status = self.fs.status()
+ _ = len(list(status.get_standbys()))
+ self.assertEqual(0, len(list(self.fs.get_replays(status=status))))
+ return status
+
+ def _confirm_single_replay(self, full=True, status=None, retries=3):
+ status = self.fs.wait_for_daemons(status=status)
+ ranks = sorted(self.fs.get_mds_map(status=status)['in'])
+ replays = list(self.fs.get_replays(status=status))
+ checked_replays = set()
+ for rank in ranks:
+ has_replay = False
+ for replay in replays:
+ if replay['rank'] == rank:
+ self.assertFalse(has_replay)
+ has_replay = True
+ checked_replays.add(replay['gid'])
+ if full and not has_replay:
+ if retries <= 0:
+ raise RuntimeError("rank "+str(rank)+" has no standby-replay follower")
+ else:
+ retries = retries-1
+ time.sleep(2)
+ self.assertEqual(checked_replays, set(info['gid'] for info in replays))
+ return status
+
+ def _check_replay_takeover(self, status, rank=0):
+ replay = self.fs.get_replay(rank=rank, status=status)
+ new_status = self.fs.wait_for_daemons()
+ new_active = self.fs.get_rank(rank=rank, status=new_status)
+ if replay:
+ self.assertEqual(replay['gid'], new_active['gid'])
+ else:
+ # double check takeover came from a standby (or some new daemon via restart)
+ found = False
+ for info in status.get_standbys():
+ if info['gid'] == new_active['gid']:
+ found = True
+ break
+ if not found:
+ for info in status.get_all():
+ self.assertNotEqual(info['gid'], new_active['gid'])
+ return new_status
+
+ def test_standby_replay_singleton(self):
+ """
+ That only one MDS becomes standby-replay.
+ """
+
+ self._confirm_no_replay()
+ self.fs.set_allow_standby_replay(True)
+ time.sleep(30)
+ self._confirm_single_replay()
+
+ def test_standby_replay_damaged(self):
+ """
+ That a standby-replay daemon can cause the rank to go damaged correctly.
+ """
+
+ self._confirm_no_replay()
+ self.config_set("mds", "mds_standby_replay_damaged", True)
+ self.fs.set_allow_standby_replay(True)
+ self.wait_until_true(
+ lambda: len(self.fs.get_damaged()) > 0,
+ timeout=30
+ )
+ status = self.fs.status()
+ self.assertListEqual([], list(self.fs.get_ranks(status=status)))
+ self.assertListEqual([0], self.fs.get_damaged(status=status))
+
+ def test_standby_replay_disable(self):
+ """
+ That turning off allow_standby_replay fails all standby-replay daemons.
+ """
+
+ self._confirm_no_replay()
+ self.fs.set_allow_standby_replay(True)
+ time.sleep(30)
+ self._confirm_single_replay()
+ self.fs.set_allow_standby_replay(False)
+ self._confirm_no_replay()
+
+ def test_standby_replay_singleton_fail(self):
+ """
+ That failures don't violate singleton constraint.
+ """
+
+ self._confirm_no_replay()
+ self.fs.set_allow_standby_replay(True)
+ status = self._confirm_single_replay()
+
+ for i in range(10):
+ time.sleep(randint(1, 5))
+ self.fs.rank_restart(status=status)
+ status = self._check_replay_takeover(status)
+ status = self._confirm_single_replay(status=status)
+
+ for i in range(10):
+ time.sleep(randint(1, 5))
+ self.fs.rank_fail()
+ status = self._check_replay_takeover(status)
+ status = self._confirm_single_replay(status=status)
+
+ def test_standby_replay_singleton_fail_multimds(self):
+ """
+ That failures don't violate singleton constraint with multiple actives.
+ """
+
+ status = self._confirm_no_replay()
+ new_max_mds = randint(2, len(list(status.get_standbys())))
+ self.fs.set_max_mds(new_max_mds)
+ self.fs.wait_for_daemons() # wait for actives to come online!
+ self.fs.set_allow_standby_replay(True)
+ status = self._confirm_single_replay(full=False)
+
+ for i in range(10):
+ time.sleep(randint(1, 5))
+ victim = randint(0, new_max_mds-1)
+ self.fs.rank_restart(rank=victim, status=status)
+ status = self._check_replay_takeover(status, rank=victim)
+ status = self._confirm_single_replay(status=status, full=False)
+
+ for i in range(10):
+ time.sleep(randint(1, 5))
+ victim = randint(0, new_max_mds-1)
+ self.fs.rank_fail(rank=victim)
+ status = self._check_replay_takeover(status, rank=victim)
+ status = self._confirm_single_replay(status=status, full=False)
+
+ def test_standby_replay_failure(self):
+ """
+ That the failure of a standby-replay daemon happens cleanly
+ and doesn't interrupt anything else.
+ """
+
+ status = self._confirm_no_replay()
+ self.fs.set_max_mds(1)
+ self.fs.set_allow_standby_replay(True)
+ status = self._confirm_single_replay()
+
+ for i in range(10):
+ time.sleep(randint(1, 5))
+ victim = self.fs.get_replay(status=status)
+ self.fs.mds_restart(mds_id=victim['name'])
+ status = self._confirm_single_replay(status=status)
+
+ def test_standby_replay_prepare_beacon(self):
+ """
+ That a MDSMonitor::prepare_beacon handles standby-replay daemons
+ correctly without removing the standby. (Note, usually a standby-replay
+ beacon will just be replied to by MDSMonitor::preprocess_beacon.)
+ """
+
+ status = self._confirm_no_replay()
+ self.fs.set_max_mds(1)
+ self.fs.set_allow_standby_replay(True)
+ status = self._confirm_single_replay()
+ replays = list(status.get_replays(self.fs.id))
+ self.assertEqual(len(replays), 1)
+ self.config_set('mds.'+replays[0]['name'], 'mds_inject_health_dummy', True)
+ time.sleep(10) # for something not to happen...
+ status = self._confirm_single_replay()
+ replays2 = list(status.get_replays(self.fs.id))
+ self.assertEqual(replays[0]['gid'], replays2[0]['gid'])
+
+ def test_rank_stopped(self):
+ """
+ That when a rank is STOPPED, standby replays for
+ that rank get torn down
+ """
+
+ status = self._confirm_no_replay()
+ standby_count = len(list(status.get_standbys()))
+ self.fs.set_max_mds(2)
+ self.fs.set_allow_standby_replay(True)
+ status = self._confirm_single_replay()
+
+ self.fs.set_max_mds(1) # stop rank 1
+
+ status = self._confirm_single_replay()
+ self.assertTrue(standby_count, len(list(status.get_standbys())))
+
+
+class TestMultiFilesystems(CephFSTestCase):
+ CLIENTS_REQUIRED = 2
+ MDSS_REQUIRED = 4
+
+ # We'll create our own filesystems and start our own daemons
+ REQUIRE_FILESYSTEM = False
+
+ def setUp(self):
+ super(TestMultiFilesystems, self).setUp()
+ self.mds_cluster.mon_manager.raw_cluster_cmd("fs", "flag", "set",
+ "enable_multiple", "true",
+ "--yes-i-really-mean-it")
+
+ def _setup_two(self):
+ fs_a = self.mds_cluster.newfs(name="alpha")
+ fs_b = self.mds_cluster.newfs(name="bravo")
+
+ self.mds_cluster.mds_restart()
+
+ # Wait for both filesystems to go healthy
+ fs_a.wait_for_daemons()
+ fs_b.wait_for_daemons()
+
+ # Reconfigure client auth caps
+ for mount in self.mounts:
+ self.mds_cluster.mon_manager.raw_cluster_cmd_result(
+ 'auth', 'caps', "client.{0}".format(mount.client_id),
+ 'mds', 'allow',
+ 'mon', 'allow r',
+ 'osd', 'allow rw pool={0}, allow rw pool={1}'.format(
+ fs_a.get_data_pool_name(), fs_b.get_data_pool_name()))
+
+ return fs_a, fs_b
+
+ def test_clients(self):
+ fs_a, fs_b = self._setup_two()
+
+ # Mount a client on fs_a
+ self.mount_a.mount_wait(cephfs_name=fs_a.name)
+ self.mount_a.write_n_mb("pad.bin", 1)
+ self.mount_a.write_n_mb("test.bin", 2)
+ a_created_ino = self.mount_a.path_to_ino("test.bin")
+ self.mount_a.create_files()
+
+ # Mount a client on fs_b
+ self.mount_b.mount_wait(cephfs_name=fs_b.name)
+ self.mount_b.write_n_mb("test.bin", 1)
+ b_created_ino = self.mount_b.path_to_ino("test.bin")
+ self.mount_b.create_files()
+
+ # Check that a non-default filesystem mount survives an MDS
+ # failover (i.e. that map subscription is continuous, not
+ # just the first time), reproduces #16022
+ old_fs_b_mds = fs_b.get_active_names()[0]
+ self.mds_cluster.mds_stop(old_fs_b_mds)
+ self.mds_cluster.mds_fail(old_fs_b_mds)
+ fs_b.wait_for_daemons()
+ background = self.mount_b.write_background()
+ # Raise exception if the write doesn't finish (i.e. if client
+ # has not kept up with MDS failure)
+ try:
+ self.wait_until_true(lambda: background.finished, timeout=30)
+ except RuntimeError:
+ # The mount is stuck, we'll have to force it to fail cleanly
+ background.stdin.close()
+ self.mount_b.umount_wait(force=True)
+ raise
+
+ self.mount_a.umount_wait()
+ self.mount_b.umount_wait()
+
+ # See that the client's files went into the correct pool
+ self.assertTrue(fs_a.data_objects_present(a_created_ino, 1024 * 1024))
+ self.assertTrue(fs_b.data_objects_present(b_created_ino, 1024 * 1024))
+
+ def test_standby(self):
+ fs_a, fs_b = self._setup_two()
+
+ # Assert that the remaining two MDS daemons are now standbys
+ a_daemons = fs_a.get_active_names()
+ b_daemons = fs_b.get_active_names()
+ self.assertEqual(len(a_daemons), 1)
+ self.assertEqual(len(b_daemons), 1)
+ original_a = a_daemons[0]
+ original_b = b_daemons[0]
+ expect_standby_daemons = set(self.mds_cluster.mds_ids) - (set(a_daemons) | set(b_daemons))
+
+ # Need all my standbys up as well as the active daemons
+ self.wait_for_daemon_start()
+ self.assertEqual(expect_standby_daemons, self.mds_cluster.get_standby_daemons())
+
+ # Kill fs_a's active MDS, see a standby take over
+ self.mds_cluster.mds_stop(original_a)
+ self.mds_cluster.mon_manager.raw_cluster_cmd("mds", "fail", original_a)
+ self.wait_until_equal(lambda: len(fs_a.get_active_names()), 1, 30,
+ reject_fn=lambda v: v > 1)
+ # Assert that it's a *different* daemon that has now appeared in the map for fs_a
+ self.assertNotEqual(fs_a.get_active_names()[0], original_a)
+
+ # Kill fs_b's active MDS, see a standby take over
+ self.mds_cluster.mds_stop(original_b)
+ self.mds_cluster.mon_manager.raw_cluster_cmd("mds", "fail", original_b)
+ self.wait_until_equal(lambda: len(fs_b.get_active_names()), 1, 30,
+ reject_fn=lambda v: v > 1)
+ # Assert that it's a *different* daemon that has now appeared in the map for fs_a
+ self.assertNotEqual(fs_b.get_active_names()[0], original_b)
+
+ # Both of the original active daemons should be gone, and all standbys used up
+ self.assertEqual(self.mds_cluster.get_standby_daemons(), set())
+
+ # Restart the ones I killed, see them reappear as standbys
+ self.mds_cluster.mds_restart(original_a)
+ self.mds_cluster.mds_restart(original_b)
+ self.wait_until_true(
+ lambda: {original_a, original_b} == self.mds_cluster.get_standby_daemons(),
+ timeout=30
+ )
+
+ def test_grow_shrink(self):
+ # Usual setup...
+ fs_a, fs_b = self._setup_two()
+
+ # Increase max_mds on fs_b, see a standby take up the role
+ fs_b.set_max_mds(2)
+ self.wait_until_equal(lambda: len(fs_b.get_active_names()), 2, 30,
+ reject_fn=lambda v: v > 2 or v < 1)
+
+ # Increase max_mds on fs_a, see a standby take up the role
+ fs_a.set_max_mds(2)
+ self.wait_until_equal(lambda: len(fs_a.get_active_names()), 2, 30,
+ reject_fn=lambda v: v > 2 or v < 1)
+
+ # Shrink fs_b back to 1, see a daemon go back to standby
+ fs_b.set_max_mds(1)
+ self.wait_until_equal(lambda: len(fs_b.get_active_names()), 1, 30,
+ reject_fn=lambda v: v > 2 or v < 1)
+
+ # Grow fs_a up to 3, see the former fs_b daemon join it.
+ fs_a.set_max_mds(3)
+ self.wait_until_equal(lambda: len(fs_a.get_active_names()), 3, 60,
+ reject_fn=lambda v: v > 3 or v < 2)