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import time
import json
import logging
from unittest import SkipTest
from tasks.cephfs.fuse_mount import FuseMount
from teuthology.exceptions import CommandFailedError
from tasks.cephfs.cephfs_test_case import CephFSTestCase
from teuthology.misc import sudo_write_file
log = logging.getLogger(__name__)
class TestSessionMap(CephFSTestCase):
CLIENTS_REQUIRED = 2
MDSS_REQUIRED = 2
def test_tell_session_drop(self):
"""
That when a `tell` command is sent using the python CLI,
its MDS session is gone after it terminates
"""
self.mount_a.umount_wait()
self.mount_b.umount_wait()
status = self.fs.status()
self.fs.rank_tell(["session", "ls"], status=status)
ls_data = self.fs.rank_asok(['session', 'ls'], status=status)
self.assertEqual(len(ls_data), 0)
def _get_connection_count(self, status=None):
perf = self.fs.rank_asok(["perf", "dump"], status=status)
conn = 0
for module, dump in perf.items():
if "AsyncMessenger::Worker" in module:
conn += dump['msgr_active_connections']
return conn
def test_tell_conn_close(self):
"""
That when a `tell` command is sent using the python CLI,
the conn count goes back to where it started (i.e. we aren't
leaving connections open)
"""
self.mount_a.umount_wait()
self.mount_b.umount_wait()
status = self.fs.status()
s = self._get_connection_count(status=status)
self.fs.rank_tell(["session", "ls"], status=status)
e = self._get_connection_count(status=status)
self.assertEqual(s, e)
def test_mount_conn_close(self):
"""
That when a client unmounts, the thread count on the MDS goes back
to what it was before the client mounted
"""
self.mount_a.umount_wait()
self.mount_b.umount_wait()
status = self.fs.status()
s = self._get_connection_count(status=status)
self.mount_a.mount()
self.mount_a.wait_until_mounted()
self.assertGreater(self._get_connection_count(status=status), s)
self.mount_a.umount_wait()
e = self._get_connection_count(status=status)
self.assertEqual(s, e)
def test_version_splitting(self):
"""
That when many sessions are updated, they are correctly
split into multiple versions to obey mds_sessionmap_keys_per_op
"""
# Start umounted
self.mount_a.umount_wait()
self.mount_b.umount_wait()
# Configure MDS to write one OMAP key at once
self.set_conf('mds', 'mds_sessionmap_keys_per_op', 1)
self.fs.mds_fail_restart()
self.fs.wait_for_daemons()
# I would like two MDSs, so that I can do an export dir later
self.fs.set_max_mds(2)
self.fs.wait_for_daemons()
status = self.fs.status()
# Bring the clients back
self.mount_a.mount()
self.mount_b.mount()
self.mount_a.create_files() # Kick the client into opening sessions
self.mount_b.create_files()
# See that they've got sessions
self.assert_session_count(2, mds_id=self.fs.get_rank(status=status)['name'])
# See that we persist their sessions
self.fs.rank_asok(["flush", "journal"], rank=0, status=status)
table_json = json.loads(self.fs.table_tool(["0", "show", "session"]))
log.info("SessionMap: {0}".format(json.dumps(table_json, indent=2)))
self.assertEqual(table_json['0']['result'], 0)
self.assertEqual(len(table_json['0']['data']['sessions']), 2)
# Now, induce a "force_open_sessions" event by exporting a dir
self.mount_a.run_shell(["mkdir", "bravo"])
self.mount_a.run_shell(["touch", "bravo/file"])
self.mount_b.run_shell(["ls", "-l", "bravo/file"])
def get_omap_wrs():
return self.fs.rank_asok(['perf', 'dump', 'objecter'], rank=1, status=status)['objecter']['omap_wr']
# Flush so that there are no dirty sessions on rank 1
self.fs.rank_asok(["flush", "journal"], rank=1, status=status)
# Export so that we get a force_open to rank 1 for the two sessions from rank 0
initial_omap_wrs = get_omap_wrs()
self.fs.rank_asok(['export', 'dir', '/bravo', '1'], rank=0, status=status)
# This is the critical (if rather subtle) check: that in the process of doing an export dir,
# we hit force_open_sessions, and as a result we end up writing out the sessionmap. There
# will be two sessions dirtied here, and because we have set keys_per_op to 1, we should see
# a single session get written out (the first of the two, triggered by the second getting marked
# dirty)
# The number of writes is two per session, because the header (sessionmap version) update and
# KV write both count. Also, multiply by 2 for each openfile table update.
self.wait_until_true(
lambda: get_omap_wrs() - initial_omap_wrs == 2*2,
timeout=30 # Long enough for an export to get acked
)
# Now end our sessions and check the backing sessionmap is updated correctly
self.mount_a.umount_wait()
self.mount_b.umount_wait()
# In-memory sessionmap check
self.assert_session_count(0, mds_id=self.fs.get_rank(status=status)['name'])
# On-disk sessionmap check
self.fs.rank_asok(["flush", "journal"], rank=0, status=status)
table_json = json.loads(self.fs.table_tool(["0", "show", "session"]))
log.info("SessionMap: {0}".format(json.dumps(table_json, indent=2)))
self.assertEqual(table_json['0']['result'], 0)
self.assertEqual(len(table_json['0']['data']['sessions']), 0)
def _configure_auth(self, mount, id_name, mds_caps, osd_caps=None, mon_caps=None):
"""
Set up auth credentials for a client mount, and write out the keyring
for the client to use.
"""
if osd_caps is None:
osd_caps = "allow rw"
if mon_caps is None:
mon_caps = "allow r"
out = self.fs.mon_manager.raw_cluster_cmd(
"auth", "get-or-create", "client.{name}".format(name=id_name),
"mds", mds_caps,
"osd", osd_caps,
"mon", mon_caps
)
mount.client_id = id_name
sudo_write_file(mount.client_remote, mount.get_keyring_path(), out)
self.set_conf("client.{name}".format(name=id_name), "keyring", mount.get_keyring_path())
def test_session_reject(self):
if not isinstance(self.mount_a, FuseMount):
raise SkipTest("Requires FUSE client to inject client metadata")
self.mount_a.run_shell(["mkdir", "foo"])
self.mount_a.run_shell(["mkdir", "foo/bar"])
self.mount_a.umount_wait()
# Mount B will be my rejected client
self.mount_b.umount_wait()
# Configure a client that is limited to /foo/bar
self._configure_auth(self.mount_b, "badguy", "allow rw path=/foo/bar")
# Check he can mount that dir and do IO
self.mount_b.mount(mount_path="/foo/bar")
self.mount_b.wait_until_mounted()
self.mount_b.create_destroy()
self.mount_b.umount_wait()
# Configure the client to claim that its mount point metadata is /baz
self.set_conf("client.badguy", "client_metadata", "root=/baz")
# Try to mount the client, see that it fails
with self.assert_cluster_log("client session with non-allowable root '/baz' denied"):
with self.assertRaises(CommandFailedError):
self.mount_b.mount(mount_path="/foo/bar")
def test_session_evict_blacklisted(self):
"""
Check that mds evicts blacklisted client
"""
if not isinstance(self.mount_a, FuseMount):
self.skipTest("Requires FUSE client to use is_blacklisted()")
self.fs.set_max_mds(2)
self.fs.wait_for_daemons()
status = self.fs.status()
self.mount_a.run_shell(["mkdir", "d0", "d1"])
self.mount_a.setfattr("d0", "ceph.dir.pin", "0")
self.mount_a.setfattr("d1", "ceph.dir.pin", "1")
self._wait_subtrees(status, 0, [('/d0', 0), ('/d1', 1)])
self.mount_a.run_shell(["touch", "d0/f0"])
self.mount_a.run_shell(["touch", "d1/f0"])
self.mount_b.run_shell(["touch", "d0/f1"])
self.mount_b.run_shell(["touch", "d1/f1"])
self.assert_session_count(2, mds_id=self.fs.get_rank(rank=0, status=status)['name'])
self.assert_session_count(2, mds_id=self.fs.get_rank(rank=1, status=status)['name'])
mount_a_client_id = self.mount_a.get_global_id()
self.fs.mds_asok(['session', 'evict', "%s" % mount_a_client_id],
mds_id=self.fs.get_rank(rank=0, status=status)['name'])
self.wait_until_true(lambda: self.mount_a.is_blacklisted(), timeout=30)
# 10 seconds should be enough for evicting client
time.sleep(10)
self.assert_session_count(1, mds_id=self.fs.get_rank(rank=0, status=status)['name'])
self.assert_session_count(1, mds_id=self.fs.get_rank(rank=1, status=status)['name'])
self.mount_a.kill_cleanup()
self.mount_a.mount()
self.mount_a.wait_until_mounted()
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