import logging import unittest from unittest import case import time import os import re from StringIO import StringIO from tasks.cephfs.fuse_mount import FuseMount from teuthology.orchestra import run from teuthology.orchestra.run import CommandFailedError log = logging.getLogger(__name__) class CephFSTestCase(unittest.TestCase): """ Test case for Ceph FS, requires caller to populate Filesystem and Mounts, into the fs, mount_a, mount_b class attributes (setting mount_b is optional) Handles resetting the cluster under test between tests. """ # Environment references mounts = None fs = None ctx = None # FIXME weird explicit naming mount_a = None mount_b = None # Declarative test requirements: subclasses should override these to indicate # their special needs. If not met, tests will be skipped. CLIENTS_REQUIRED = 1 MDSS_REQUIRED = 1 REQUIRE_KCLIENT_REMOTE = False REQUIRE_ONE_CLIENT_REMOTE = False LOAD_SETTINGS = [] def setUp(self): if len(self.fs.mds_ids) < self.MDSS_REQUIRED: raise case.SkipTest("Only have {0} MDSs, require {1}".format( len(self.fs.mds_ids), self.MDSS_REQUIRED )) if len(self.mounts) < self.CLIENTS_REQUIRED: raise case.SkipTest("Only have {0} clients, require {1}".format( len(self.mounts), self.CLIENTS_REQUIRED )) if self.REQUIRE_KCLIENT_REMOTE: if not isinstance(self.mounts[0], FuseMount) or not isinstance(self.mounts[1], FuseMount): # kclient kill() power cycles nodes, so requires clients to each be on # their own node if self.mounts[0].client_remote.hostname == self.mounts[1].client_remote.hostname: raise case.SkipTest("kclient clients must be on separate nodes") if self.REQUIRE_ONE_CLIENT_REMOTE: if self.mounts[0].client_remote.hostname in self.fs.get_mds_hostnames(): raise case.SkipTest("Require first client to be on separate server from MDSs") # Unmount all surplus clients for i in range(self.CLIENTS_REQUIRED, len(self.mounts)): mount = self.mounts[i] log.info("Unmounting unneeded client {0}".format(mount.client_id)) mount.umount_wait() # Create friendly mount_a, mount_b attrs for i in range(0, self.CLIENTS_REQUIRED): setattr(self, "mount_{0}".format(chr(ord('a') + i)), self.mounts[i]) self.fs.clear_firewall() # Unmount in order to start each test on a fresh mount, such # that test_barrier can have a firm expectation of what OSD # epoch the clients start with. if self.mount_a.is_mounted(): self.mount_a.umount_wait() if self.mount_b: if self.mount_b.is_mounted(): self.mount_b.umount_wait() # To avoid any issues with e.g. unlink bugs, we destroy and recreate # the filesystem rather than just doing a rm -rf of files self.fs.mds_stop() self.fs.mds_fail() self.fs.delete() self.fs.create() # In case the previous filesystem had filled up the RADOS cluster, wait for that # flag to pass. osd_mon_report_interval_max = int(self.fs.get_config("osd_mon_report_interval_max", service_type='osd')) self.wait_until_true(lambda: not self.fs.is_full(), timeout=osd_mon_report_interval_max * 5) self.fs.mds_restart() self.fs.wait_for_daemons() if not self.mount_a.is_mounted(): self.mount_a.mount() self.mount_a.wait_until_mounted() if self.mount_b: if not self.mount_b.is_mounted(): self.mount_b.mount() self.mount_b.wait_until_mounted() # Load an config settings of interest for setting in self.LOAD_SETTINGS: setattr(self, setting, int(self.fs.mds_asok( ['config', 'get', setting], self.fs.mds_ids[0] )[setting])) self.configs_set = set() def tearDown(self): self.fs.clear_firewall() self.mount_a.teardown() if self.mount_b: self.mount_b.teardown() for subsys, key in self.configs_set: self.fs.clear_ceph_conf(subsys, key) def set_conf(self, subsys, key, value): self.configs_set.add((subsys, key)) self.fs.set_ceph_conf(subsys, key, value) def assert_session_count(self, expected, ls_data=None, mds_id=None): if ls_data is None: ls_data = self.fs.mds_asok(['session', 'ls'], mds_id=mds_id) self.assertEqual(expected, len(ls_data), "Expected {0} sessions, found {1}".format( expected, len(ls_data) )) def assert_session_state(self, client_id, expected_state): self.assertEqual( self._session_by_id( self.fs.mds_asok(['session', 'ls'])).get(client_id, {'state': None})['state'], expected_state) def get_session_data(self, client_id): return self._session_by_id(client_id) def _session_list(self): ls_data = self.fs.mds_asok(['session', 'ls']) ls_data = [s for s in ls_data if s['state'] not in ['stale', 'closed']] return ls_data def get_session(self, client_id, session_ls=None): if session_ls is None: session_ls = self.fs.mds_asok(['session', 'ls']) return self._session_by_id(session_ls)[client_id] def _session_by_id(self, session_ls): return dict([(s['id'], s) for s in session_ls]) def wait_until_equal(self, get_fn, expect_val, timeout, reject_fn=None): period = 5 elapsed = 0 while True: val = get_fn() if val == expect_val: return elif reject_fn and reject_fn(val): raise RuntimeError("wait_until_equal: forbidden value {0} seen".format(val)) else: if elapsed >= timeout: raise RuntimeError("Timed out after {0} seconds waiting for {1} (currently {2})".format( elapsed, expect_val, val )) else: log.debug("wait_until_equal: {0} != {1}, waiting...".format(val, expect_val)) time.sleep(period) elapsed += period log.debug("wait_until_equal: success") def wait_until_true(self, condition, timeout): period = 5 elapsed = 0 while True: if condition(): return else: if elapsed >= timeout: raise RuntimeError("Timed out after {0} seconds".format(elapsed)) else: log.debug("wait_until_true: waiting...") time.sleep(period) elapsed += period log.debug("wait_until_true: success") def assert_mds_crash(self, daemon_id): """ Assert that the a particular MDS daemon crashes (block until it does) """ try: self.fs.mds_daemons[daemon_id].proc.wait() except CommandFailedError as e: log.info("MDS '{0}' crashed with status {1} as expected".format(daemon_id, e.exitstatus)) self.fs.mds_daemons[daemon_id].proc = None # Go remove the coredump from the crash, otherwise teuthology.internal.coredump will # catch it later and treat it as a failure. p = self.fs.mds_daemons[daemon_id].remote.run(args=[ "sudo", "sysctl", "-n", "kernel.core_pattern"], stdout=StringIO()) core_pattern = p.stdout.getvalue().strip() if os.path.dirname(core_pattern): # Non-default core_pattern with a directory in it # We have seen a core_pattern that looks like it's from teuthology's coredump # task, so proceed to clear out the core file log.info("Clearing core from pattern: {0}".format(core_pattern)) # Determine the PID of the crashed MDS by inspecting the MDSMap, it had # to talk to the mons to get assigned a rank to reach the point of crashing addr = self.fs.mon_manager.get_mds_status(daemon_id)['addr'] pid_str = addr.split("/")[1] log.info("Determined crasher PID was {0}".format(pid_str)) # Substitute PID into core_pattern to get a glob core_glob = core_pattern.replace("%p", pid_str) core_glob = re.sub("%[a-z]", "*", core_glob) # Match all for all other % tokens # Verify that we see the expected single coredump matching the expected pattern ls_proc = self.fs.mds_daemons[daemon_id].remote.run(args=[ "sudo", "ls", run.Raw(core_glob) ], stdout=StringIO()) cores = [f for f in ls_proc.stdout.getvalue().strip().split("\n") if f] log.info("Enumerated cores: {0}".format(cores)) self.assertEqual(len(cores), 1) log.info("Found core file {0}, deleting it".format(cores[0])) self.fs.mds_daemons[daemon_id].remote.run(args=[ "sudo", "rm", "-f", cores[0] ]) else: log.info("No core_pattern directory set, nothing to clear (internal.coredump not enabled?)") else: raise AssertionError("MDS daemon '{0}' did not crash as expected".format(daemon_id))