def run_with_class(process_class):
with temporary_dir() as td:
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
with open(os.path.join(sandbox, 'silly_pants'), 'w') as silly_pants:
p = process_class('process', 'echo test >&%s' % silly_pants.fileno(),
0, taskpath, sandbox)
p.start()
return wait_for_rc(taskpath.getpath('process_checkpoint'))
def __init__(self, root, resource_monitor_class=TaskResourceMonitor):
self._pathspec = TaskPath(root=root)
self._detector = TaskDetector(root)
if not issubclass(resource_monitor_class, ResourceMonitorBase):
raise ValueError("resource monitor class must implement ResourceMonitorBase!")
self._resource_monitor = resource_monitor_class
self._active_tasks = {} # task_id => ActiveObservedTask
self._finished_tasks = {} # task_id => FinishedObservedTask
self._stop_event = threading.Event()
ExceptionalThread.__init__(self)
Lockable.__init__(self)
self.daemon = True
def test_simple_process_other_user(*args):
with temporary_dir() as td:
some_user = get_other_nonroot_user()
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
p = TestProcess('process', 'echo hello world', 0, taskpath, sandbox, user=some_user.pw_name)
p.start()
rc = wait_for_rc(taskpath.getpath('process_checkpoint'))
# since we're not actually root, the best we can do is check the right things were attempted
assert os.setgroups.calledwith([g.gr_gid for g in grp.getgrall() if some_user.pw_name in g])
assert os.setgid.calledwith(some_user.pw_uid)
assert os.setuid.calledwith(some_user.pw_gid)
def test_simple_process():
with temporary_dir() as td:
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
p = TestProcess('process', 'echo hello world', 0, taskpath, sandbox)
p.start()
rc = wait_for_rc(taskpath.getpath('process_checkpoint'))
assert rc == 0
stdout = taskpath.with_filename('stdout').getpath('process_logdir')
assert os.path.exists(stdout)
with open(stdout, 'r') as fp:
assert fp.read() == 'hello world\n'
def test_log_permissions():
with temporary_dir() as td:
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
p = TestProcess('process', 'echo hello world', 0, taskpath, sandbox)
p.start()
rc = wait_for_rc(taskpath.getpath('process_checkpoint'))
stdout = taskpath.with_filename('stdout').getpath('process_logdir')
stderr = taskpath.with_filename('stderr').getpath('process_logdir')
assert os.path.exists(stdout)
assert os.path.exists(stderr)
assert os.stat(stdout).st_uid == os.getuid()
assert os.stat(stderr).st_uid == os.getuid()
def test_basic_as_job(self):
proxy_driver = ProxyDriver()
with temporary_dir() as tempdir:
te = ThermosExecutor(runner_provider=make_provider(tempdir),
sandbox_provider=DefaultTestSandboxProvider)
te.launchTask(proxy_driver,
make_task(MESOS_JOB(task=HELLO_WORLD), instanceId=0))
te.runner_started.wait()
while te._status_manager is None:
time.sleep(0.1)
te.terminated.wait()
tm = TaskMonitor(TaskPath(root=tempdir),
task_id=HELLO_WORLD_TASK_ID)
runner_state = tm.get_state()
assert 'hello_world_hello_world-001' in runner_state.processes, (
'Could not find processes, got: %s' %
' '.join(runner_state.processes))
updates = proxy_driver.method_calls['sendStatusUpdate']
assert len(updates) == 3
status_updates = [arg_tuple[0][0] for arg_tuple in updates]
assert status_updates[0].state == mesos_pb.TASK_STARTING
assert status_updates[1].state == mesos_pb.TASK_RUNNING
assert status_updates[2].state == mesos_pb.TASK_FINISHED
def test_other_user_fails_nonroot():
with temporary_dir() as td:
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
with pytest.raises(Process.PermissionError):
p = TestProcess('process', 'echo hello world', 0, taskpath, sandbox,
user=get_other_nonroot_user().pw_name)
def test_log_permissions_other_user(*mocks):
with temporary_dir() as td:
some_user = get_other_nonroot_user()
taskpath = TaskPath(root=td, task_id='task', process='process', run=0)
sandbox = setup_sandbox(td, taskpath)
p = TestProcess('process', 'echo hello world', 0, taskpath, sandbox, user=some_user.pw_name)
p.start()
rc = wait_for_rc(taskpath.getpath('process_checkpoint'))
# since we're not actually root, the best we can do is check the right things were attempted
stdout = taskpath.with_filename('stdout').getpath('process_logdir')
stderr = taskpath.with_filename('stderr').getpath('process_logdir')
assert os.path.exists(stdout)
assert os.path.exists(stderr)
assert os.chown.calledwith(stdout, some_user.pw_uid, some_user.pw_gid)
assert os.chown.calledwith(stderr, some_user.pw_uid, some_user.pw_gid)
def __init__(self, task, portmap={}, success_rate=100, random_seed=31337):
"""
task = Thermos task
portmap = port map
success_rate = success rate of writing checkpoint to disk
"""
self.task = task
with temporary_file(cleanup=False) as fp:
self.job_filename = fp.name
fp.write(ThermosTaskWrapper(task).to_json())
self.state_filename = tempfile.mktemp()
self.tempdir = tempfile.mkdtemp()
self.task_id = '%s-runner-base' % int(time.time() * 1000000)
self.sandbox = os.path.join(self.tempdir, 'sandbox')
self.portmap = portmap
self.cleaned = False
self.pathspec = TaskPath(root=self.tempdir, task_id=self.task_id)
self.script_filename = None
self.success_rate = success_rate
self.random_seed = random_seed
self._run_count = 0
def get(cls, task_id, checkpoint_root):
"""
Get a TaskRunner bound to the task_id in checkpoint_root.
"""
path = TaskPath(root=checkpoint_root, task_id=task_id, state='active')
task_json = path.getpath('task_path')
task_checkpoint = path.getpath('runner_checkpoint')
if not os.path.exists(task_json):
return None
task = ThermosConfigLoader.load_json(task_json)
if task is None:
return None
if len(task.tasks()) == 0:
return None
try:
checkpoint = CheckpointDispatcher.from_file(task_checkpoint)
if checkpoint is None or checkpoint.header is None:
return None
return cls(task.tasks()[0].task(), checkpoint_root, checkpoint.header.sandbox,
log_dir=checkpoint.header.log_dir, task_id=task_id,
portmap=checkpoint.header.ports)
except Exception as e:
log.error('Failed to reconstitute checkpoint in TaskRunner.get: %s' % e, exc_info=True)
return None
def start(self, timeout=MAX_WAIT):
"""Fork the task runner and return once the underlying task is running, up to timeout."""
self.forking.set()
try:
chmod_plus_x(self._runner_pex)
except OSError as e:
if e.errno != errno.EPERM:
raise TaskError('Failed to chmod +x runner: %s' % e)
self._monitor = TaskMonitor(TaskPath(root=self._checkpoint_root),
self._task_id)
cmdline_args = self._cmdline()
log.info('Forking off runner with cmdline: %s' %
' '.join(cmdline_args))
try:
self._popen = subprocess.Popen(cmdline_args)
except OSError as e:
raise TaskError(e)
self.forked.set()
log.debug('Waiting for task to start.')
def is_started():
return self._monitor and (self._monitor.active
or self._monitor.finished)
waited = Amount(0, Time.SECONDS)
while not is_started() and waited < timeout:
log.debug(' - sleeping...')
self._clock.sleep(self.POLL_INTERVAL.as_(Time.SECONDS))
waited += self.POLL_INTERVAL
if not is_started():
log.error('Task did not start with in deadline, forcing loss.')
self.lose()
raise TaskError('Task did not start within deadline.')
def setup_task(self, task, root, finished=False, corrupt=False):
"""Set up the checkpoint stream for the given task in the given checkpoint root, optionally
finished and/or with a corrupt stream"""
class FastTaskRunner(TaskRunner):
COORDINATOR_INTERVAL_SLEEP = Amount(1, Time.MICROSECONDS)
tr = FastTaskRunner(task=task,
checkpoint_root=root,
sandbox=os.path.join(root, 'sandbox',
task.name().get()),
clock=ThreadedClock(time.time()))
with tr.control():
# initialize checkpoint stream
pass
if finished:
tr.kill()
if corrupt:
ckpt_file = TaskPath(root=root,
tr=tr.task_id).getpath('runner_checkpoint')
with open(ckpt_file, 'w') as f:
f.write("definitely not a valid checkpoint stream")
return tr.task_id
def __init__(self, task, portmap={}, success_rate=100, random_seed=31337):
"""
task = Thermos task
portmap = port map
success_rate = success rate of writing checkpoint to disk
"""
self.task = task
with temporary_file(cleanup=False) as fp:
self.job_filename = fp.name
fp.write(ThermosTaskWrapper(task).to_json())
self.state_filename = tempfile.mktemp()
self.tempdir = tempfile.mkdtemp()
self.task_id = '%s-runner-base' % int(time.time()*1000000)
self.sandbox = os.path.join(self.tempdir, 'sandbox')
self.portmap = portmap
self.cleaned = False
self.pathspec = TaskPath(root = self.tempdir, task_id = self.task_id)
self.script_filename = None
self.success_rate = success_rate
self.random_seed = random_seed
self._run_count = 0
def __init__(self, checkpoint_root): self._path = TaskPath(root=checkpoint_root)
class CheckpointInspector(object):
def __init__(self, checkpoint_root):
self._path = TaskPath(root=checkpoint_root)
@staticmethod
def get_timestamp(process_record):
if process_record :
for timestamp in ('fork_time', 'start_time', 'stop_time'):
stamp = getattr(process_record, timestamp, None)
if stamp:
return stamp
return 0
def inspect(self, task_id):
"""
Reconstructs the checkpoint stream and returns a CheckpointInspection.
"""
dispatcher = CheckpointDispatcher()
state = RunnerState(processes = {})
muxer = ProcessMuxer(self._path.given(task_id=task_id))
runner_processes = []
coordinator_processes = set()
processes = set()
def consume_process_record(record):
if not record.process_status:
return
try:
user_uid = pwd.getpwnam(state.header.user).pw_uid
except KeyError:
log.error('Could not find user: %s' % state.header.user)
return
if record.process_status.state == ProcessState.FORKED:
coordinator_processes.add((record.process_status.coordinator_pid, user_uid,
record.process_status.fork_time))
elif record.process_status.state == ProcessState.RUNNING:
processes.add((record.process_status.pid, user_uid,
record.process_status.start_time))
# replay runner checkpoint
runner_pid = None
runner_latest_update = 0
try:
with open(self._path.given(task_id=task_id).getpath('runner_checkpoint')) as fp:
with closing(ThriftRecordReader(fp, RunnerCkpt)) as ckpt:
for record in ckpt:
dispatcher.dispatch(state, record)
runner_latest_update = max(runner_latest_update,
self.get_timestamp(record.process_status))
# collect all bound runners
if record.task_status:
if record.task_status.runner_pid != runner_pid:
runner_processes.append((record.task_status.runner_pid,
record.task_status.runner_uid or 0,
record.task_status.timestamp_ms))
runner_pid = record.task_status.runner_pid
elif record.process_status:
consume_process_record(record)
except (IOError, OSError, RecordIO.Error) as err:
log.debug('Error inspecting task runner checkpoint: %s' % err)
return
# register existing processes in muxer
for process_name in state.processes:
muxer.register(process_name)
# read process checkpoints
process_latest_update = runner_latest_update
for record in muxer.select():
process_latest_update = max(process_latest_update, self.get_timestamp(record.process_status))
consume_process_record(record)
return CheckpointInspection(
runner_latest_update=runner_latest_update,
process_latest_update=process_latest_update,
runner_processes=runner_processes,
coordinator_processes=coordinator_processes,
processes=processes)
def __init__(self, task, checkpoint_root, sandbox, log_dir=None,
task_id=None, portmap=None, user=None, chroot=False, clock=time,
universal_handler=None, planner_class=TaskPlanner):
"""
required:
task (config.Task) = the task to run
checkpoint_root (path) = the checkpoint root
sandbox (path) = the sandbox in which the path will be run
[if None, cwd will be assumed, but garbage collection will be
disabled for this task.]
optional:
log_dir (string) = directory to house stdout/stderr logs. If not specified, logs will be
written into the sandbox directory under .logs/
task_id (string) = bind to this task id. if not specified, will synthesize an id based
upon task.name()
portmap (dict) = a map (string => integer) from name to port, e.g. { 'http': 80 }
user (string) = the user to run the task as. if not current user, requires setuid
privileges.
chroot (boolean) = whether or not to chroot into the sandbox prior to exec.
clock (time interface) = the clock to use throughout
universal_handler = checkpoint record handler (only used for testing)
planner_class (TaskPlanner class) = TaskPlanner class to use for constructing the task
planning policy.
"""
if not issubclass(planner_class, TaskPlanner):
raise TypeError('planner_class must be a TaskPlanner.')
self._clock = clock
launch_time = self._clock.time()
launch_time_ms = '%06d' % int((launch_time - int(launch_time)) * 10**6)
if not task_id:
self._task_id = '%s-%s.%s' % (task.name(),
time.strftime('%Y%m%d-%H%M%S', time.localtime(launch_time)),
launch_time_ms)
else:
self._task_id = task_id
current_user = TaskRunnerHelper.get_actual_user()
self._user = user or current_user
# TODO(wickman) This should be delegated to the ProcessPlatform / Helper
if self._user != current_user:
if os.geteuid() != 0:
raise ValueError('task specifies user as %s, but %s does not have setuid permission!' % (
self._user, current_user))
self._portmap = portmap or {}
self._launch_time = launch_time
self._log_dir = log_dir or os.path.join(sandbox, '.logs')
self._pathspec = TaskPath(root=checkpoint_root, task_id=self._task_id, log_dir=self._log_dir)
try:
ThermosTaskValidator.assert_valid_task(task)
ThermosTaskValidator.assert_valid_ports(task, self._portmap)
except ThermosTaskValidator.InvalidTaskError as e:
raise self.InvalidTask('Invalid task: %s' % e)
context = ThermosContext(
task_id=self._task_id,
ports=self._portmap,
user=self._user)
self._task, uninterp = (task % Environment(thermos=context)).interpolate()
if len(uninterp) > 0:
raise self.InvalidTask('Failed to interpolate task, missing: %s' %
', '.join(str(ref) for ref in uninterp))
try:
ThermosTaskValidator.assert_same_task(self._pathspec, self._task)
except ThermosTaskValidator.InvalidTaskError as e:
raise self.InvalidTask('Invalid task: %s' % e)
self._plan = None # plan currently being executed (updated by Handlers)
self._regular_plan = planner_class(self._task, clock=clock,
process_filter=lambda proc: proc.final().get() == False)
self._finalizing_plan = planner_class(self._task, clock=clock,
process_filter=lambda proc: proc.final().get() == True)
self._chroot = chroot
self._sandbox = sandbox
self._terminal_state = None
self._ckpt = None
self._process_map = dict((p.name().get(), p) for p in self._task.processes())
self._task_processes = {}
self._stages = dict((state, stage(self)) for state, stage in self.STAGES.items())
self._finalization_start = None
self._preemption_deadline = None
self._watcher = ProcessMuxer(self._pathspec)
self._state = RunnerState(processes = {})
# create runner state
universal_handler = universal_handler or TaskRunnerUniversalHandler
self._dispatcher = CheckpointDispatcher()
self._dispatcher.register_handler(universal_handler(self))
self._dispatcher.register_handler(TaskRunnerProcessHandler(self))
self._dispatcher.register_handler(TaskRunnerTaskHandler(self))
# recover checkpointed runner state and update plan
self._recovery = True
self._replay_runner_ckpt()
def _runner_ckpt(self, task_id):
"""Return the runner checkpoint file for a given task_id."""
return TaskPath(root=self._checkpoint_root, task_id=task_id).getpath('runner_checkpoint')
class TaskRunner(object):
"""
Run a ThermosTask.
This class encapsulates the core logic to run and control the state of a Thermos task.
Typically, it will be instantiated directly to control a new task, but a TaskRunner can also be
synthesised from an existing task's checkpoint root
"""
class Error(Exception): pass
class InvalidTask(Error): pass
class InternalError(Error): pass
class PermissionError(Error): pass
class StateError(Error): pass
# Maximum amount of time we spend waiting for new updates from the checkpoint streams
# before doing housecleaning (checking for LOST tasks, dead PIDs.)
MAX_ITERATION_TIME = Amount(10, Time.SECONDS)
# Minimum amount of time we wait between polls for updates on coordinator checkpoints.
COORDINATOR_INTERVAL_SLEEP = Amount(1, Time.SECONDS)
# Amount of time we're willing to wait after forking before we expect the runner to have
# exec'ed the child process.
LOST_TIMEOUT = Amount(60, Time.SECONDS)
# Active task stages
STAGES = {
TaskState.ACTIVE: TaskRunnerStage_ACTIVE,
TaskState.CLEANING: TaskRunnerStage_CLEANING,
TaskState.FINALIZING: TaskRunnerStage_FINALIZING
}
@classmethod
def get(cls, task_id, checkpoint_root):
"""
Get a TaskRunner bound to the task_id in checkpoint_root.
"""
path = TaskPath(root=checkpoint_root, task_id=task_id, state='active')
task_json = path.getpath('task_path')
task_checkpoint = path.getpath('runner_checkpoint')
if not os.path.exists(task_json):
return None
task = ThermosConfigLoader.load_json(task_json)
if task is None:
return None
if len(task.tasks()) == 0:
return None
try:
checkpoint = CheckpointDispatcher.from_file(task_checkpoint)
if checkpoint is None or checkpoint.header is None:
return None
return cls(task.tasks()[0].task(), checkpoint_root, checkpoint.header.sandbox,
log_dir=checkpoint.header.log_dir, task_id=task_id,
portmap=checkpoint.header.ports)
except Exception as e:
log.error('Failed to reconstitute checkpoint in TaskRunner.get: %s' % e, exc_info=True)
return None
def __init__(self, task, checkpoint_root, sandbox, log_dir=None,
task_id=None, portmap=None, user=None, chroot=False, clock=time,
universal_handler=None, planner_class=TaskPlanner):
"""
required:
task (config.Task) = the task to run
checkpoint_root (path) = the checkpoint root
sandbox (path) = the sandbox in which the path will be run
[if None, cwd will be assumed, but garbage collection will be
disabled for this task.]
optional:
log_dir (string) = directory to house stdout/stderr logs. If not specified, logs will be
written into the sandbox directory under .logs/
task_id (string) = bind to this task id. if not specified, will synthesize an id based
upon task.name()
portmap (dict) = a map (string => integer) from name to port, e.g. { 'http': 80 }
user (string) = the user to run the task as. if not current user, requires setuid
privileges.
chroot (boolean) = whether or not to chroot into the sandbox prior to exec.
clock (time interface) = the clock to use throughout
universal_handler = checkpoint record handler (only used for testing)
planner_class (TaskPlanner class) = TaskPlanner class to use for constructing the task
planning policy.
"""
if not issubclass(planner_class, TaskPlanner):
raise TypeError('planner_class must be a TaskPlanner.')
self._clock = clock
launch_time = self._clock.time()
launch_time_ms = '%06d' % int((launch_time - int(launch_time)) * 10**6)
if not task_id:
self._task_id = '%s-%s.%s' % (task.name(),
time.strftime('%Y%m%d-%H%M%S', time.localtime(launch_time)),
launch_time_ms)
else:
self._task_id = task_id
current_user = TaskRunnerHelper.get_actual_user()
self._user = user or current_user
# TODO(wickman) This should be delegated to the ProcessPlatform / Helper
if self._user != current_user:
if os.geteuid() != 0:
raise ValueError('task specifies user as %s, but %s does not have setuid permission!' % (
self._user, current_user))
self._portmap = portmap or {}
self._launch_time = launch_time
self._log_dir = log_dir or os.path.join(sandbox, '.logs')
self._pathspec = TaskPath(root=checkpoint_root, task_id=self._task_id, log_dir=self._log_dir)
try:
ThermosTaskValidator.assert_valid_task(task)
ThermosTaskValidator.assert_valid_ports(task, self._portmap)
except ThermosTaskValidator.InvalidTaskError as e:
raise self.InvalidTask('Invalid task: %s' % e)
context = ThermosContext(
task_id=self._task_id,
ports=self._portmap,
user=self._user)
self._task, uninterp = (task % Environment(thermos=context)).interpolate()
if len(uninterp) > 0:
raise self.InvalidTask('Failed to interpolate task, missing: %s' %
', '.join(str(ref) for ref in uninterp))
try:
ThermosTaskValidator.assert_same_task(self._pathspec, self._task)
except ThermosTaskValidator.InvalidTaskError as e:
raise self.InvalidTask('Invalid task: %s' % e)
self._plan = None # plan currently being executed (updated by Handlers)
self._regular_plan = planner_class(self._task, clock=clock,
process_filter=lambda proc: proc.final().get() == False)
self._finalizing_plan = planner_class(self._task, clock=clock,
process_filter=lambda proc: proc.final().get() == True)
self._chroot = chroot
self._sandbox = sandbox
self._terminal_state = None
self._ckpt = None
self._process_map = dict((p.name().get(), p) for p in self._task.processes())
self._task_processes = {}
self._stages = dict((state, stage(self)) for state, stage in self.STAGES.items())
self._finalization_start = None
self._preemption_deadline = None
self._watcher = ProcessMuxer(self._pathspec)
self._state = RunnerState(processes = {})
# create runner state
universal_handler = universal_handler or TaskRunnerUniversalHandler
self._dispatcher = CheckpointDispatcher()
self._dispatcher.register_handler(universal_handler(self))
self._dispatcher.register_handler(TaskRunnerProcessHandler(self))
self._dispatcher.register_handler(TaskRunnerTaskHandler(self))
# recover checkpointed runner state and update plan
self._recovery = True
self._replay_runner_ckpt()
@property
def task(self):
return self._task
@property
def task_id(self):
return self._task_id
@property
def state(self):
return self._state
@property
def processes(self):
return self._task_processes
def task_state(self):
return self._state.statuses[-1].state if self._state.statuses else TaskState.ACTIVE
def close_ckpt(self):
"""Force close the checkpoint stream. This is necessary for runners terminated through
exception propagation."""
log.debug('Closing the checkpoint stream.')
self._ckpt.close()
@contextmanager
def control(self, force=False):
"""
Bind to the checkpoint associated with this task, position to the end of the log if
it exists, or create it if it doesn't. Fails if we cannot get "leadership" i.e. a
file lock on the checkpoint stream.
"""
if self.is_terminal():
raise TaskRunner.StateError('Cannot take control of a task in terminal state.')
if self._sandbox:
safe_mkdir(self._sandbox)
ckpt_file = self._pathspec.getpath('runner_checkpoint')
try:
self._ckpt = TaskRunnerHelper.open_checkpoint(ckpt_file, force=force, state=self._state)
except TaskRunnerHelper.PermissionError:
raise TaskRunner.PermissionError('Unable to open checkpoint %s' % ckpt_file)
log.debug('Flipping recovery mode off.')
self._recovery = False
self._set_task_status(self.task_state())
self._resume_task()
try:
yield
except Exception as e:
log.error('Caught exception in self.control(): %s' % e)
log.error(' %s' % traceback.format_exc())
self._ckpt.close()
def _resume_task(self):
assert self._ckpt is not None
unapplied_updates = self._replay_process_ckpts()
if self.is_terminal():
raise self.StateError('Cannot resume terminal task.')
self._initialize_ckpt_header()
self._replay(unapplied_updates)
def _ckpt_write(self, record):
"""
Write to the checkpoint stream if we're not in recovery mode.
"""
if not self._recovery:
self._ckpt.write(record)
def _replay(self, checkpoints):
"""
Replay a sequence of RunnerCkpts.
"""
for checkpoint in checkpoints:
self._dispatcher.dispatch(self._state, checkpoint)
def _replay_runner_ckpt(self):
"""
Replay the checkpoint stream associated with this task.
"""
ckpt_file = self._pathspec.getpath('runner_checkpoint')
if os.path.exists(ckpt_file):
fp = open(ckpt_file, "r")
ckpt_recover = ThriftRecordReader(fp, RunnerCkpt)
for record in ckpt_recover:
log.debug('Replaying runner checkpoint record: %s' % record)
self._dispatcher.dispatch(self._state, record, recovery=True)
ckpt_recover.close()
def _replay_process_ckpts(self):
"""
Replay the unmutating process checkpoints. Return the unapplied process updates that
would mutate the runner checkpoint stream.
"""
process_updates = self._watcher.select()
unapplied_process_updates = []
for process_update in process_updates:
if self._dispatcher.would_update(self._state, process_update):
unapplied_process_updates.append(process_update)
else:
self._dispatcher.dispatch(self._state, process_update, recovery=True)
return unapplied_process_updates
def _initialize_ckpt_header(self):
"""
Initializes the RunnerHeader for this checkpoint stream if it has not already
been constructed.
"""
if self._state.header is None:
header = RunnerHeader(
task_id=self._task_id,
launch_time_ms=int(self._launch_time*1000),
sandbox=self._sandbox,
log_dir=self._log_dir,
hostname=socket.gethostname(),
user=self._user,
ports=self._portmap)
runner_ckpt = RunnerCkpt(runner_header=header)
self._dispatcher.dispatch(self._state, runner_ckpt)
def _set_task_status(self, state):
update = TaskStatus(state=state, timestamp_ms=int(self._clock.time() * 1000),
runner_pid=os.getpid(), runner_uid=os.getuid())
runner_ckpt = RunnerCkpt(task_status=update)
self._dispatcher.dispatch(self._state, runner_ckpt, self._recovery)
def _finalization_remaining(self):
# If a preemption deadline has been set, use that.
if self._preemption_deadline:
return max(0, self._preemption_deadline - self._clock.time())
# Otherwise, use the finalization wait provided in the configuration.
finalization_allocation = self.task.finalization_wait().get()
if self._finalization_start is None:
return sys.float_info.max
else:
waited = max(0, self._clock.time() - self._finalization_start)
return max(0, finalization_allocation - waited)
def _set_process_status(self, process_name, process_state, **kw):
if 'sequence_number' in kw:
sequence_number = kw.pop('sequence_number')
log.debug('_set_process_status(%s <= %s, seq=%s[force])' % (process_name,
ProcessState._VALUES_TO_NAMES.get(process_state), sequence_number))
else:
current_run = self._current_process_run(process_name)
if not current_run:
assert process_state == ProcessState.WAITING
sequence_number = 0
else:
sequence_number = current_run.seq + 1
log.debug('_set_process_status(%s <= %s, seq=%s[auto])' % (process_name,
ProcessState._VALUES_TO_NAMES.get(process_state), sequence_number))
runner_ckpt = RunnerCkpt(process_status=ProcessStatus(
process=process_name, state=process_state, seq=sequence_number, **kw))
self._dispatcher.dispatch(self._state, runner_ckpt, self._recovery)
def _task_process_from_process_name(self, process_name, sequence_number):
"""
Construct a Process() object from a process_name, populated with its
correct run number and fully interpolated commandline.
"""
run_number = len(self.state.processes[process_name]) - 1
pathspec = self._pathspec.given(process=process_name, run=run_number)
process = self._process_map.get(process_name)
if process is None:
raise self.InternalError('FATAL: Could not find process: %s' % process_name)
def close_ckpt_and_fork():
pid = os.fork()
if pid == 0 and self._ckpt is not None:
self._ckpt.close()
return pid
return Process(
process.name().get(),
process.cmdline().get(),
sequence_number,
pathspec,
self._sandbox,
self._user,
chroot=self._chroot,
fork=close_ckpt_and_fork)
def deadlocked(self, plan=None):
"""Check whether a plan is deadlocked, i.e. there are no running/runnable processes, and the
plan is not complete."""
plan = plan or self._regular_plan
now = self._clock.time()
running = list(plan.running)
runnable = list(plan.runnable_at(now))
waiting = list(plan.waiting_at(now))
log.debug('running:%d runnable:%d waiting:%d complete:%s' % (
len(running), len(runnable), len(waiting), plan.is_complete()))
return len(running + runnable + waiting) == 0 and not plan.is_complete()
def is_healthy(self):
"""Check whether the TaskRunner is healthy. A healthy TaskRunner is not deadlocked and has not
reached its max_failures count."""
max_failures = self._task.max_failures().get()
deadlocked = self.deadlocked()
under_failure_limit = max_failures == 0 or len(self._regular_plan.failed) < max_failures
log.debug('max_failures:%d failed:%d under_failure_limit:%s deadlocked:%s ==> health:%s' % (
max_failures, len(self._regular_plan.failed), under_failure_limit, deadlocked,
not deadlocked and under_failure_limit))
return not deadlocked and under_failure_limit
def _current_process_run(self, process_name):
if process_name not in self._state.processes or len(self._state.processes[process_name]) == 0:
return None
return self._state.processes[process_name][-1]
def is_process_lost(self, process_name):
"""Determine whether or not we should mark a task as LOST and do so if necessary."""
current_run = self._current_process_run(process_name)
if not current_run:
raise self.InternalError('No current_run for process %s!' % process_name)
def forked_but_never_came_up():
return current_run.state == ProcessState.FORKED and (
self._clock.time() - current_run.fork_time > TaskRunner.LOST_TIMEOUT.as_(Time.SECONDS))
def running_but_coordinator_died():
if current_run.state != ProcessState.RUNNING:
return False
coordinator_pid, _, _ = TaskRunnerHelper.scan_process(self.state, process_name)
if coordinator_pid is not None:
return False
elif self._watcher.has_data(process_name):
return False
return True
if forked_but_never_came_up() or running_but_coordinator_died():
log.info('Detected a LOST task: %s' % current_run)
log.debug(' forked_but_never_came_up: %s' % forked_but_never_came_up())
log.debug(' running_but_coordinator_died: %s' % running_but_coordinator_died())
return True
return False
def _run_plan(self, plan):
log.debug('Schedule pass:'******'running: %s' % ' '.join(plan.running))
log.debug('finished: %s' % ' '.join(plan.finished))
launched = []
for process_name in plan.running:
if self.is_process_lost(process_name):
self._set_process_status(process_name, ProcessState.LOST)
now = self._clock.time()
runnable = list(plan.runnable_at(now))
waiting = list(plan.waiting_at(now))
log.debug('runnable: %s' % ' '.join(runnable))
log.debug('waiting: %s' % ' '.join(
'%s[T-%.1fs]' % (process, plan.get_wait(process)) for process in waiting))
def pick_processes(process_list):
if self._task.max_concurrency().get() == 0:
return process_list
num_to_pick = max(self._task.max_concurrency().get() - len(running), 0)
return process_list[:num_to_pick]
for process_name in pick_processes(runnable):
tp = self._task_processes.get(process_name)
if tp:
current_run = self._current_process_run(process_name)
assert current_run.state == ProcessState.WAITING
else:
self._set_process_status(process_name, ProcessState.WAITING)
tp = self._task_processes[process_name]
log.info('Forking Process(%s)' % process_name)
tp.start()
launched.append(tp)
return len(launched) > 0
def _terminate_plan(self, plan):
for process in plan.running:
last_run = self._current_process_run(process)
if last_run and last_run.state in (ProcessState.FORKED, ProcessState.RUNNING):
TaskRunnerHelper.terminate_process(self.state, process)
def has_running_processes(self):
"""
Returns True if any processes associated with this task have active pids.
"""
process_tree = TaskRunnerHelper.scantree(self.state)
return any(any(process_set) for process_set in process_tree.values())
def has_active_processes(self):
"""
Returns True if any processes are in non-terminal states.
"""
return any(not TaskRunnerHelper.is_process_terminal(run.state) for run in
filter(None, (self._current_process_run(process) for process in self.state.processes)))
def collect_updates(self, timeout=None):
"""
Collects and applies updates from process checkpoint streams. Returns the number
of applied process checkpoints.
"""
if self.has_active_processes():
sleep_interval = self.COORDINATOR_INTERVAL_SLEEP.as_(Time.SECONDS)
total_time = 0.0
while True:
process_updates = self._watcher.select()
for process_update in process_updates:
self._dispatcher.dispatch(self._state, process_update, self._recovery)
if process_updates:
return len(process_updates)
if timeout and total_time >= timeout:
break
total_time += sleep_interval
self._clock.sleep(sleep_interval)
return 0
def is_terminal(self):
return TaskRunnerHelper.is_task_terminal(self.task_state())
def terminal_state(self):
if self._terminal_state:
log.debug('Forced terminal state: %s' %
TaskState._VALUES_TO_NAMES.get(self._terminal_state, 'UNKNOWN'))
return self._terminal_state
else:
return TaskState.SUCCESS if self.is_healthy() else TaskState.FAILED
def run(self, force=False):
"""
Entrypoint to runner. Assume control of checkpoint stream, and execute TaskRunnerStages
until runner is terminal.
"""
if self.is_terminal():
return
with self.control(force):
self._run()
def _run(self):
iteration_time = self.MAX_ITERATION_TIME.as_(Time.SECONDS)
while not self.is_terminal():
start = self._clock.time()
# step 1: execute stage corresponding to the state we're currently in
runner = self._stages[self.task_state()]
iteration_wait = runner.run()
if iteration_wait is None:
log.debug('Run loop: No more work to be done in state %s' %
TaskState._VALUES_TO_NAMES.get(self.task_state(), 'UNKNOWN'))
self._set_task_status(runner.transition_to())
continue
log.debug('Run loop: Work to be done within %.1fs' % iteration_wait)
# step 2: check child process checkpoint streams for updates
if not self.collect_updates(iteration_wait):
# If we don't collect any updates, at least 'touch' the checkpoint stream
# so as to prevent garbage collection.
elapsed = self._clock.time() - start
if elapsed < iteration_wait:
log.debug('Update collection only took %.1fs, idling %.1fs' % (
elapsed, iteration_wait - elapsed))
self._clock.sleep(iteration_wait - elapsed)
log.debug('Run loop: No updates collected, touching checkpoint.')
os.utime(self._pathspec.getpath('runner_checkpoint'), None)
# step 3: reap any zombie child processes
TaskRunnerHelper.reap_children()
def kill(self, force=False, terminal_status=TaskState.KILLED,
preemption_wait=Amount(1, Time.MINUTES)):
"""
Kill all processes associated with this task and set task/process states as terminal_status
(defaults to KILLED)
"""
log.debug('Runner issued kill: force:%s, preemption_wait:%s' % (
force, preemption_wait))
assert terminal_status in (TaskState.KILLED, TaskState.LOST)
self._preemption_deadline = self._clock.time() + preemption_wait.as_(Time.SECONDS)
with self.control(force):
if self.is_terminal():
log.warning('Task is not in ACTIVE state, cannot issue kill.')
return
self._terminal_state = terminal_status
if self.task_state() == TaskState.ACTIVE:
self._set_task_status(TaskState.CLEANING)
self._run()
def lose(self, force=False):
"""
Mark a task as LOST and kill any straggling processes.
"""
self.kill(force, preemption_wait=Amount(0, Time.SECONDS), terminal_status=TaskState.LOST)
def _kill(self):
processes = TaskRunnerHelper.scantree(self._state)
for process, pid_tuple in processes.items():
current_run = self._current_process_run(process)
coordinator_pid, pid, tree = pid_tuple
if TaskRunnerHelper.is_process_terminal(current_run.state):
if coordinator_pid or pid or tree:
log.warning('Terminal process (%s) still has running pids:' % process)
log.warning(' coordinator_pid: %s' % coordinator_pid)
log.warning(' pid: %s' % pid)
log.warning(' tree: %s' % tree)
TaskRunnerHelper.kill_process(self.state, process)
else:
if coordinator_pid or pid or tree:
log.info('Transitioning %s to KILLED' % process)
self._set_process_status(process, ProcessState.KILLED,
stop_time=self._clock.time(), return_code=-1)
else:
log.info('Transitioning %s to LOST' % process)
if current_run.state != ProcessState.WAITING:
self._set_process_status(process, ProcessState.LOST)
def __init__(self, root):
self._root_dir = root
self._pathspec = TaskPath()
def __init__(self, checkpoint_root):
self._path = TaskPath(root=checkpoint_root)
def test_legacy_task_roots():
assert TaskPath().given(
task_id='foo').getpath('checkpoint_path').startswith(
TaskPath.DEFAULT_CHECKPOINT_ROOT)
assert TaskPath(root='/var/lib/mesos').given(
task_id='foo').getpath('checkpoint_path').startswith('/var/lib/mesos')
def __init__(self, root): self._root_dir = root self._pathspec = TaskPath()
def kill(cls,
task_id,
checkpoint_root,
force=False,
terminal_status=TaskState.KILLED,
clock=time):
"""
An implementation of Task killing that doesn't require a fully hydrated TaskRunner object.
Terminal status must be either KILLED or LOST state.
"""
if terminal_status not in (TaskState.KILLED, TaskState.LOST):
raise cls.Error('terminal_status must be KILLED or LOST (got %s)' %
TaskState._VALUES_TO_NAMES.get(terminal_status)
or terminal_status)
pathspec = TaskPath(root=checkpoint_root, task_id=task_id)
checkpoint = pathspec.getpath('runner_checkpoint')
state = CheckpointDispatcher.from_file(checkpoint)
if state is None or state.header is None or state.statuses is None:
if force:
log.error(
'Task has uninitialized TaskState - forcibly finalizing')
cls.finalize_task(pathspec)
return
else:
log.error('Cannot update states in uninitialized TaskState!')
return
ckpt = cls.open_checkpoint(checkpoint, force=force, state=state)
def write_task_state(state):
update = TaskStatus(state=state,
timestamp_ms=int(clock.time() * 1000),
runner_pid=os.getpid(),
runner_uid=os.getuid())
ckpt.write(RunnerCkpt(task_status=update))
def write_process_status(status):
ckpt.write(RunnerCkpt(process_status=status))
if cls.is_task_terminal(state.statuses[-1].state):
log.info('Task is already in terminal state! Finalizing.')
cls.finalize_task(pathspec)
return
with closing(ckpt):
write_task_state(TaskState.ACTIVE)
for process, history in state.processes.items():
process_status = history[-1]
if not cls.is_process_terminal(process_status.state):
if cls.kill_process(state, process):
write_process_status(
ProcessStatus(process=process,
state=ProcessState.KILLED,
seq=process_status.seq + 1,
return_code=-9,
stop_time=clock.time()))
else:
if process_status.state is not ProcessState.WAITING:
write_process_status(
ProcessStatus(process=process,
state=ProcessState.LOST,
seq=process_status.seq + 1))
write_task_state(terminal_status)
cls.finalize_task(pathspec)
class TaskObserver(ExceptionalThread, Lockable):
"""
The TaskObserver monitors the thermos checkpoint root for active/finished
tasks. It is used to be the oracle of the state of all thermos tasks on
a machine.
It currently returns JSON, but really should just return objects. We should
then build an object->json translator.
"""
class UnexpectedError(Exception): pass
class UnexpectedState(Exception): pass
POLLING_INTERVAL = Amount(1, Time.SECONDS)
def __init__(self, root, resource_monitor_class=TaskResourceMonitor):
self._pathspec = TaskPath(root=root)
self._detector = TaskDetector(root)
if not issubclass(resource_monitor_class, ResourceMonitorBase):
raise ValueError("resource monitor class must implement ResourceMonitorBase!")
self._resource_monitor = resource_monitor_class
self._active_tasks = {} # task_id => ActiveObservedTask
self._finished_tasks = {} # task_id => FinishedObservedTask
self._stop_event = threading.Event()
ExceptionalThread.__init__(self)
Lockable.__init__(self)
self.daemon = True
@property
def active_tasks(self):
"""Return a dictionary of active Tasks"""
return self._active_tasks
@property
def finished_tasks(self):
"""Return a dictionary of finished Tasks"""
return self._finished_tasks
@property
def all_tasks(self):
"""Return a dictionary of all Tasks known by the TaskObserver"""
return dict(self.active_tasks.items() + self.finished_tasks.items())
def stop(self):
self._stop_event.set()
def start(self):
ExceptionalThread.start(self)
@Lockable.sync
def add_active_task(self, task_id):
if task_id in self.finished_tasks:
log.error('Found an active task (%s) in finished tasks?' % task_id)
return
task_monitor = TaskMonitor(self._pathspec, task_id)
if not task_monitor.get_state().header:
log.info('Unable to load task "%s"' % task_id)
return
sandbox = task_monitor.get_state().header.sandbox
resource_monitor = self._resource_monitor(task_monitor, sandbox)
resource_monitor.start()
self._active_tasks[task_id] = ActiveObservedTask(
task_id=task_id, pathspec=self._pathspec,
task_monitor=task_monitor, resource_monitor=resource_monitor
)
@Lockable.sync
def add_finished_task(self, task_id):
self._finished_tasks[task_id] = FinishedObservedTask(
task_id=task_id, pathspec=self._pathspec
)
@Lockable.sync
def active_to_finished(self, task_id):
self.remove_active_task(task_id)
self.add_finished_task(task_id)
@Lockable.sync
def remove_active_task(self, task_id):
task = self.active_tasks.pop(task_id)
task.resource_monitor.kill()
@Lockable.sync
def remove_finished_task(self, task_id):
self.finished_tasks.pop(task_id)
def run(self):
"""
The internal thread for the observer. This periodically polls the
checkpoint root for new tasks, or transitions of tasks from active to
finished state.
"""
while not self._stop_event.is_set():
time.sleep(self.POLLING_INTERVAL.as_(Time.SECONDS))
active_tasks = [task_id for _, task_id in self._detector.get_task_ids(state='active')]
finished_tasks = [task_id for _, task_id in self._detector.get_task_ids(state='finished')]
with self.lock:
# Ensure all tasks currently detected on the system are observed appropriately
for active in active_tasks:
if active not in self.active_tasks:
log.debug('task_id %s (unknown) -> active' % active)
self.add_active_task(active)
for finished in finished_tasks:
if finished in self.active_tasks:
log.debug('task_id %s active -> finished' % finished)
self.active_to_finished(finished)
elif finished not in self.finished_tasks:
log.debug('task_id %s (unknown) -> finished' % finished)
self.add_finished_task(finished)
# Remove ObservedTasks for tasks no longer detected on the system
for unknown in set(self.active_tasks) - set(active_tasks + finished_tasks):
log.debug('task_id %s active -> (unknown)' % unknown)
self.remove_active_task(unknown)
for unknown in set(self.finished_tasks) - set(active_tasks + finished_tasks):
log.debug('task_id %s finished -> (unknown)' % unknown)
self.remove_finished_task(unknown)
@Lockable.sync
def process_from_name(self, task_id, process_id):
if task_id in self.all_tasks:
task = self.all_tasks[task_id].task
if task:
for process in task.processes():
if process.name().get() == process_id:
return process
@Lockable.sync
def task_count(self):
"""
Return the count of tasks that could be ready properly from disk.
This may be <= self.task_id_count()
"""
return dict(
active=len(self.active_tasks),
finished=len(self.finished_tasks),
all=len(self.all_tasks),
)
@Lockable.sync
def task_id_count(self):
"""
Return the raw count of active and finished task_ids from the TaskDetector.
"""
num_active = len(list(self._detector.get_task_ids(state='active')))
num_finished = len(list(self._detector.get_task_ids(state='finished')))
return dict(active=num_active, finished=num_finished, all=num_active + num_finished)
def _get_tasks_of_type(self, type):
"""Convenience function to return all tasks of a given type"""
tasks = {
'active': self.active_tasks,
'finished': self.finished_tasks,
'all': self.all_tasks,
}.get(type, None)
if tasks is None:
log.error('Unknown task type %s' % type)
return {}
return tasks
@Lockable.sync
def state(self, task_id):
"""Return a dict containing mapped information about a task's state"""
real_state = self.raw_state(task_id)
if real_state is None or real_state.header is None:
return {}
else:
return dict(
task_id=real_state.header.task_id,
launch_time=real_state.header.launch_time_ms / 1000.0,
sandbox=real_state.header.sandbox,
hostname=real_state.header.hostname,
user=real_state.header.user
)
@Lockable.sync
def raw_state(self, task_id):
"""
Return the current runner state (thrift blob: gen.twitter.thermos.ttypes.RunnerState)
of a given task id
"""
if task_id not in self.all_tasks:
return None
return self.all_tasks[task_id].state
@Lockable.sync
def _task_processes(self, task_id):
"""
Return the processes of a task given its task_id.
Returns a map from state to processes in that state, where possible
states are: waiting, running, success, failed.
"""
if task_id not in self.all_tasks:
return {}
state = self.raw_state(task_id)
if state is None or state.header is None:
return {}
waiting, running, success, failed, killed = [], [], [], [], []
for process, runs in state.processes.items():
# No runs ==> nothing started.
if len(runs) == 0:
waiting.append(process)
else:
if runs[-1].state in (None, ProcessState.WAITING, ProcessState.LOST):
waiting.append(process)
elif runs[-1].state in (ProcessState.FORKED, ProcessState.RUNNING):
running.append(process)
elif runs[-1].state == ProcessState.SUCCESS:
success.append(process)
elif runs[-1].state == ProcessState.FAILED:
failed.append(process)
elif runs[-1].state == ProcessState.KILLED:
killed.append(process)
else:
# TODO(wickman) Consider log.error instead of raising.
raise self.UnexpectedState(
"Unexpected ProcessHistoryState: %s" % state.processes[process].state)
return dict(waiting=waiting, running=running, success=success, failed=failed, killed=killed)
@Lockable.sync
def main(self, type=None, offset=None, num=None):
"""Return a set of information about tasks, optionally filtered
Args:
type = (all|active|finished|None) [default: all]
offset = offset into the list of task_ids [default: 0]
num = number of results to return [default: 20]
Tasks are sorted by interest:
- active tasks are sorted by start time
- finished tasks are sorted by completion time
Returns:
{
tasks: [task_id_1, ..., task_id_N],
type: query type,
offset: next offset,
num: next num
}
"""
type = type or 'all'
offset = offset or 0
num = num or 20
# Get a list of all ObservedTasks of requested type
tasks = sorted((task for task in self._get_tasks_of_type(type).values()),
key=attrgetter('mtime'), reverse=True)
# Filter by requested offset + number of results
end = num
if offset < 0:
offset = offset % len(tasks) if len(tasks) > abs(offset) else 0
end += offset
tasks = tasks[offset:end]
def task_row(observed_task):
"""Generate an output row for a Task"""
task = self._task(observed_task.task_id)
# tasks include those which could not be found properly and are hence empty {}
if task:
return dict(
task_id=observed_task.task_id,
name=task['name'],
role=task['user'],
launch_timestamp=task['launch_timestamp'],
state=task['state'],
state_timestamp=task['state_timestamp'],
ports=task['ports'],
**task['resource_consumption'])
return dict(
tasks=filter(None, map(task_row, tasks)),
type=type,
offset=offset,
num=num,
task_count=self.task_count()[type],
)
def _sample(self, task_id):
if task_id not in self.active_tasks:
log.debug("Task %s not found in active tasks" % task_id)
sample = ProcessSample.empty().to_dict()
sample['disk'] = 0
else:
resource_sample = self.active_tasks[task_id].resource_monitor.sample()[1]
sample = resource_sample.process_sample.to_dict()
sample['disk'] = resource_sample.disk_usage
log.debug("Got sample for task %s: %s" % (task_id, sample))
return sample
@Lockable.sync
def task_statuses(self, task_id):
"""
Return the sequence of task states.
[(task_state [string], timestamp), ...]
"""
# Unknown task_id.
if task_id not in self.all_tasks:
return []
task = self.all_tasks[task_id]
if task is None:
return []
state = self.raw_state(task_id)
if state is None or state.header is None:
return []
# Get the timestamp of the transition into the current state.
return [
(TaskState._VALUES_TO_NAMES.get(st.state, 'UNKNOWN'), st.timestamp_ms / 1000)
for st in state.statuses]
@Lockable.sync
def _task(self, task_id):
"""
Return composite information about a particular task task_id, given the below
schema.
{
task_id: string,
name: string,
user: string,
launch_timestamp: seconds,
state: string [ACTIVE, SUCCESS, FAILED]
ports: { name1: 'url', name2: 'url2' }
resource_consumption: { cpu:, ram:, disk: }
processes: { -> names only
waiting: [],
running: [],
success: [],
failed: []
}
}
"""
# Unknown task_id.
if task_id not in self.all_tasks:
return {}
task = self.all_tasks[task_id].task
if task is None:
# TODO(wickman) Can this happen?
log.error('Could not find task: %s' % task_id)
return {}
state = self.raw_state(task_id)
if state is None or state.header is None:
# TODO(wickman) Can this happen?
return {}
# Get the timestamp of the transition into the current state.
current_state = state.statuses[-1].state
last_state = state.statuses[0]
state_timestamp = 0
for status in state.statuses:
if status.state == current_state and last_state != current_state:
state_timestamp = status.timestamp_ms / 1000
last_state = status.state
return dict(
task_id=task_id,
name=task.name().get(),
launch_timestamp=state.statuses[0].timestamp_ms / 1000,
state=TaskState._VALUES_TO_NAMES[state.statuses[-1].state],
state_timestamp=state_timestamp,
user=state.header.user,
resource_consumption=self._sample(task_id),
ports=state.header.ports,
processes=self._task_processes(task_id),
task_struct=task,
)
@Lockable.sync
def _get_process_resource_consumption(self, task_id, process_name):
if task_id not in self.active_tasks:
log.debug("Task %s not found in active tasks" % task_id)
return ProcessSample.empty().to_dict()
sample = self.active_tasks[task_id].resource_monitor.sample_by_process(process_name).to_dict()
log.debug('Resource consumption (%s, %s) => %s' % (task_id, process_name, sample))
return sample
@Lockable.sync
def _get_process_tuple(self, history, run):
"""
Return the basic description of a process run if it exists, otherwise
an empty dictionary.
{
process_name: string
process_run: int
state: string [WAITING, FORKED, RUNNING, SUCCESS, KILLED, FAILED, LOST]
(optional) start_time: seconds from epoch
(optional) stop_time: seconds from epoch
}
"""
if len(history) == 0:
return {}
if run >= len(history):
return {}
else:
process_run = history[run]
run = run % len(history)
d = dict(
process_name=process_run.process,
process_run=run,
state=ProcessState._VALUES_TO_NAMES[process_run.state],
)
if process_run.start_time:
d.update(start_time=process_run.start_time)
if process_run.stop_time:
d.update(stop_time=process_run.stop_time)
return d
@Lockable.sync
def process(self, task_id, process, run=None):
"""
Returns a process run, where the schema is given below:
{
process_name: string
process_run: int
used: { cpu: float, ram: int bytes, disk: int bytes }
start_time: (time since epoch in millis (utc))
stop_time: (time since epoch in millis (utc))
state: string [WAITING, FORKED, RUNNING, SUCCESS, KILLED, FAILED, LOST]
}
If run is None, return the latest run.
"""
state = self.raw_state(task_id)
if state is None or state.header is None:
return {}
if process not in state.processes:
return {}
history = state.processes[process]
run = int(run) if run is not None else -1
tup = self._get_process_tuple(history, run)
if not tup:
return {}
if tup.get('state') == 'RUNNING':
tup.update(used=self._get_process_resource_consumption(task_id, process))
return tup
@Lockable.sync
def _processes(self, task_id):
"""
Return
{
process1: { ... }
process2: { ... }
...
processN: { ... }
}
where processK is the latest run of processK and in the schema as
defined by process().
"""
if task_id not in self.all_tasks:
return {}
state = self.raw_state(task_id)
if state is None or state.header is None:
return {}
processes = self._task_processes(task_id)
d = dict()
for process_type in processes:
for process_name in processes[process_type]:
d[process_name] = self.process(task_id, process_name)
return d
@Lockable.sync
def processes(self, task_ids):
"""
Given a list of task_ids, returns a map of task_id => processes, where processes
is defined by the schema in _processes.
"""
if not isinstance(task_ids, (list, tuple)):
return {}
return dict((task_id, self._processes(task_id)) for task_id in task_ids)
@Lockable.sync
def get_run_number(self, runner_state, process, run=None):
if runner_state is not None and runner_state.processes is not None:
run = run if run is not None else -1
if run < len(runner_state.processes[process]):
if len(runner_state.processes[process]) > 0:
return run % len(runner_state.processes[process])
@Lockable.sync
def logs(self, task_id, process, run=None):
"""
Given a task_id and a process and (optional) run number, return a dict:
{
stderr: [dir, filename]
stdout: [dir, filename]
}
If the run number is unspecified, uses the latest run.
TODO(wickman) Just return the filenames directly?
"""
runner_state = self.raw_state(task_id)
if runner_state is None or runner_state.header is None:
return {}
run = self.get_run_number(runner_state, process, run)
if run is None:
return {}
log_path = self._pathspec.given(task_id=task_id, process=process, run=run,
log_dir=runner_state.header.log_dir).getpath('process_logdir')
return dict(
stdout=[log_path, 'stdout'],
stderr=[log_path, 'stderr']
)
@staticmethod
def _sanitize_path(base_path, relpath):
"""
Attempts to sanitize a path through path normalization, also making sure
that the relative path is contained inside of base_path.
"""
if relpath is None:
relpath = "."
normalized_base = os.path.realpath(base_path)
normalized = os.path.realpath(os.path.join(base_path, relpath))
if normalized.startswith(normalized_base):
return (normalized_base, os.path.relpath(normalized, normalized_base))
return (None, None)
@Lockable.sync
def valid_file(self, task_id, path):
"""
Like valid_path, but also verify the given path is a file
"""
chroot, path = self.valid_path(task_id, path)
if chroot and path and os.path.isfile(os.path.join(chroot, path)):
return chroot, path
return None, None
@Lockable.sync
def valid_path(self, task_id, path):
"""
Given a task_id and a path within that task_id's sandbox, verify:
(1) it's actually in the sandbox and not outside
(2) it's a valid, existing path
Returns chroot and the pathname relative to that chroot.
"""
runner_state = self.raw_state(task_id)
if runner_state is None or runner_state.header is None:
return None, None
try:
chroot = runner_state.header.sandbox
except AttributeError:
return None, None
chroot, path = self._sanitize_path(chroot, path)
if chroot and path:
return chroot, path
return None, None
@Lockable.sync
def files(self, task_id, path=None):
"""
Returns dictionary
{
task_id: task_id
chroot: absolute directory on machine
path: sanitized relative path w.r.t. chroot
dirs: list of directories
files: list of files
}
"""
# TODO(jon): DEPRECATED: most of the necessary logic is handled directly in the templates.
# Also, global s/chroot/sandbox/?
empty = dict(task_id=task_id, chroot=None, path=None, dirs=None, files=None)
path = path if path is not None else '.'
runner_state = self.raw_state(task_id)
if runner_state is None:
return empty
try:
chroot = runner_state.header.sandbox
except AttributeError:
return empty
if chroot is None: # chroot-less job
return empty
chroot, path = self._sanitize_path(chroot, path)
if (chroot is None or path is None
or not os.path.isdir(os.path.join(chroot, path))):
return empty
names = os.listdir(os.path.join(chroot, path))
dirs, files = [], []
for name in names:
if os.path.isdir(os.path.join(chroot, path, name)):
dirs.append(name)
else:
files.append(name)
return dict(
task_id=task_id,
chroot=chroot,
path=path,
dirs=dirs,
files=files
)
class Runner(object):
RUN_JOB_SCRIPT = """
import os
import random
import sys
from twitter.common import log
from twitter.common.log.options import LogOptions
from twitter.thermos.config.loader import ThermosConfigLoader
from twitter.thermos.core.helper import TaskRunnerHelper
from twitter.thermos.core.runner import TaskRunner, TaskRunnerUniversalHandler
from thrift.TSerialization import serialize as thrift_serialize
random.seed(%(random_seed)d)
log.init('runner_base')
LogOptions.set_disk_log_level('DEBUG')
task = ThermosConfigLoader.load_json('%(filename)s')
task = task.tasks()[0].task
success_rate=%(success_rate)d
class AngryHandler(TaskRunnerUniversalHandler):
def checkpoint(self, record):
if not self._runner._recovery:
if random.randint(0, 100) <= success_rate:
super(AngryHandler, self).checkpoint(record)
else:
sys.exit(1)
sandbox = os.path.join('%(sandbox)s', '%(task_id)s')
args = {}
args['task_id'] = '%(task_id)s'
if %(portmap)s:
args['portmap'] = %(portmap)s
args['universal_handler'] = AngryHandler
runner = TaskRunner(task, '%(root)s', sandbox, **args)
runner.run()
with open('%(state_filename)s', 'w') as fp:
fp.write(thrift_serialize(runner.state))
"""
def __init__(self, task, portmap={}, success_rate=100, random_seed=31337):
"""
task = Thermos task
portmap = port map
success_rate = success rate of writing checkpoint to disk
"""
self.task = task
with temporary_file(cleanup=False) as fp:
self.job_filename = fp.name
fp.write(ThermosTaskWrapper(task).to_json())
self.state_filename = tempfile.mktemp()
self.tempdir = tempfile.mkdtemp()
self.task_id = '%s-runner-base' % int(time.time() * 1000000)
self.sandbox = os.path.join(self.tempdir, 'sandbox')
self.portmap = portmap
self.cleaned = False
self.pathspec = TaskPath(root=self.tempdir, task_id=self.task_id)
self.script_filename = None
self.success_rate = success_rate
self.random_seed = random_seed
self._run_count = 0
@property
def pid(self):
return self.po.pid
@property
def root(self):
return self.tempdir
def run(self):
self._run_count += 1
atexit.register(self.cleanup)
if self.script_filename:
os.unlink(self.script_filename)
with temporary_file(cleanup=False) as fp:
self.script_filename = fp.name
fp.write(
self.RUN_JOB_SCRIPT % {
'filename': self.job_filename,
'sandbox': self.sandbox,
'root': self.tempdir,
'task_id': self.task_id,
'state_filename': self.state_filename,
'portmap': repr(self.portmap),
'success_rate': self.success_rate,
'random_seed': self.random_seed + self._run_count,
})
with environment_as(PYTHONPATH=os.pathsep.join(sys.path)):
self.po = subprocess.Popen([sys.executable, self.script_filename],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
try:
so, se = self.po.communicate()
except OSError as e:
if e.errno == errno.ECHILD:
so = se = 'Killed'
else:
raise
rc = self.po.returncode
if rc != 0:
if os.path.exists(self.job_filename):
config = open(self.job_filename).read()
else:
config = 'Nonexistent!'
if 'THERMOS_DEBUG' in os.environ:
print(
"Runner failed!\n\n\nconfig:%s\n\n\nstdout:%s\n\n\nstderr:%s\n\n\n"
% (config, so, se))
try:
with open(self.state_filename, 'r') as fp:
self.state = thrift_deserialize(RunnerState(), fp.read())
except Exception as e:
if 'THERMOS_DEBUG' in os.environ:
print('Failed to load Runner state: %s' % e, file=sys.stderr)
self.state = RunnerState()
try:
self.reconstructed_state = CheckpointDispatcher.from_file(
self.pathspec.getpath('runner_checkpoint'))
except:
self.reconstructed_state = None
self.initialized = True
return rc
def cleanup(self):
if not self.cleaned:
if hasattr(self, 'po'):
try:
self.po.kill()
except:
pass
os.unlink(self.job_filename)
os.unlink(self.script_filename)
if 'THERMOS_DEBUG' not in os.environ:
shutil.rmtree(self.tempdir, ignore_errors=True)
else:
print('Logs saved in %s' % self.tempdir)
self.cleaned = True
class Runner(object):
RUN_JOB_SCRIPT = """
import os
import random
import sys
from twitter.common import log
from twitter.common.log.options import LogOptions
from twitter.thermos.config.loader import ThermosConfigLoader
from twitter.thermos.core.helper import TaskRunnerHelper
from twitter.thermos.core.runner import TaskRunner, TaskRunnerUniversalHandler
from thrift.TSerialization import serialize as thrift_serialize
random.seed(%(random_seed)d)
log.init('runner_base')
LogOptions.set_disk_log_level('DEBUG')
task = ThermosConfigLoader.load_json('%(filename)s')
task = task.tasks()[0].task
success_rate=%(success_rate)d
class AngryHandler(TaskRunnerUniversalHandler):
def checkpoint(self, record):
if not self._runner._recovery:
if random.randint(0, 100) <= success_rate:
super(AngryHandler, self).checkpoint(record)
else:
sys.exit(1)
sandbox = os.path.join('%(sandbox)s', '%(task_id)s')
args = {}
args['task_id'] = '%(task_id)s'
if %(portmap)s:
args['portmap'] = %(portmap)s
args['universal_handler'] = AngryHandler
runner = TaskRunner(task, '%(root)s', sandbox, **args)
runner.run()
with open('%(state_filename)s', 'w') as fp:
fp.write(thrift_serialize(runner.state))
"""
def __init__(self, task, portmap={}, success_rate=100, random_seed=31337):
"""
task = Thermos task
portmap = port map
success_rate = success rate of writing checkpoint to disk
"""
self.task = task
with temporary_file(cleanup=False) as fp:
self.job_filename = fp.name
fp.write(ThermosTaskWrapper(task).to_json())
self.state_filename = tempfile.mktemp()
self.tempdir = tempfile.mkdtemp()
self.task_id = '%s-runner-base' % int(time.time()*1000000)
self.sandbox = os.path.join(self.tempdir, 'sandbox')
self.portmap = portmap
self.cleaned = False
self.pathspec = TaskPath(root = self.tempdir, task_id = self.task_id)
self.script_filename = None
self.success_rate = success_rate
self.random_seed = random_seed
self._run_count = 0
@property
def pid(self):
return self.po.pid
@property
def root(self):
return self.tempdir
def run(self):
self._run_count += 1
atexit.register(self.cleanup)
if self.script_filename:
os.unlink(self.script_filename)
with temporary_file(cleanup=False) as fp:
self.script_filename = fp.name
fp.write(self.RUN_JOB_SCRIPT % {
'filename': self.job_filename,
'sandbox': self.sandbox,
'root': self.tempdir,
'task_id': self.task_id,
'state_filename': self.state_filename,
'portmap': repr(self.portmap),
'success_rate': self.success_rate,
'random_seed': self.random_seed + self._run_count,
})
with environment_as(PYTHONPATH=os.pathsep.join(sys.path)):
self.po = subprocess.Popen([sys.executable, self.script_filename],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
try:
so, se = self.po.communicate()
except OSError as e:
if e.errno == errno.ECHILD:
so = se = 'Killed'
else:
raise
rc = self.po.returncode
if rc != 0:
if os.path.exists(self.job_filename):
config = open(self.job_filename).read()
else:
config = 'Nonexistent!'
if 'THERMOS_DEBUG' in os.environ:
print("Runner failed!\n\n\nconfig:%s\n\n\nstdout:%s\n\n\nstderr:%s\n\n\n" % (
config, so, se))
try:
with open(self.state_filename, 'r') as fp:
self.state = thrift_deserialize(RunnerState(), fp.read())
except Exception as e:
if 'THERMOS_DEBUG' in os.environ:
print('Failed to load Runner state: %s' % e, file=sys.stderr)
self.state = RunnerState()
try:
self.reconstructed_state = CheckpointDispatcher.from_file(
self.pathspec.getpath('runner_checkpoint'))
except:
self.reconstructed_state = None
self.initialized = True
return rc
def cleanup(self):
if not self.cleaned:
if hasattr(self, 'po'):
try:
self.po.kill()
except:
pass
os.unlink(self.job_filename)
os.unlink(self.script_filename)
if 'THERMOS_DEBUG' not in os.environ:
shutil.rmtree(self.tempdir, ignore_errors=True)
else:
print('Logs saved in %s' % self.tempdir)
self.cleaned = True
def tail(args, options):
"""Tail the logs of a task process.
Usage: thermos tail task_name [process_name]
"""
if len(args) == 0:
app.error('Expected a task to tail, got nothing!')
if len(args) not in (1, 2):
app.error(
'Expected at most two arguments (task and optional process), got %d'
% len(args))
task_id = args[0]
detector = TaskDetector(root=options.root)
checkpoint = CheckpointDispatcher.from_file(
detector.get_checkpoint(task_id))
log_dir = checkpoint.header.log_dir
process_runs = [(process, run)
for (process,
run) in detector.get_process_runs(task_id, log_dir)]
if len(args) == 2:
process_runs = [(process, run) for (process, run) in process_runs
if process == args[1]]
if len(process_runs) == 0:
print('ERROR: No processes found.', file=sys.stderr)
sys.exit(1)
processes = set([process for process, _ in process_runs])
if len(processes) != 1:
print('ERROR: More than one process matches query.', file=sys.stderr)
sys.exit(1)
process = processes.pop()
run = max([run for _, run in process_runs])
logdir = TaskPath(root=options.root,
task_id=args[0],
process=process,
run=run,
log_dir=log_dir).getpath('process_logdir')
logfile = os.path.join(logdir,
'stderr' if options.use_stderr else 'stdout')
monitor = TaskMonitor(TaskPath(root=options.root), args[0])
def log_is_active():
active_processes = monitor.get_active_processes()
for process_status, process_run in active_processes:
if process_status.process == process and process_run == run:
return True
return False
if not log_is_active():
print('Tail of terminal log %s' % logfile)
for line in tail_closed(logfile):
print(line.rstrip())
return
now = time.time()
next_check = now + 5.0
print('Tail of active log %s' % logfile)
for line in tail_f(logfile, include_last=True, forever=False):
print(line.rstrip())
if time.time() > next_check:
if not log_is_active():
break
else:
next_check = time.time() + 5.0
class TaskDetector(object):
"""
Helper class in front of TaskPath to detect active/finished/running tasks. Performs no
introspection on the state of a task; merely detects based on file paths on disk.
"""
class MatchingError(Exception):
pass
def __init__(self, root):
self._root_dir = root
self._pathspec = TaskPath()
def get_task_ids(self, state=None):
paths = glob.glob(
self._pathspec.given(root=self._root_dir,
task_id="*",
state=state or '*').getpath('task_path'))
path_re = re.compile(
self._pathspec.given(root=re.escape(self._root_dir),
task_id="(\S+)",
state='(\S+)').getpath('task_path'))
for path in paths:
try:
task_state, task_id = path_re.match(path).groups()
except:
continue
if state is None or task_state == state:
yield (task_state, task_id)
def get_process_runs(self, task_id, log_dir):
paths = glob.glob(
self._pathspec.given(root=self._root_dir,
task_id=task_id,
log_dir=log_dir,
process='*',
run='*').getpath('process_logdir'))
path_re = re.compile(
self._pathspec.given(root=re.escape(self._root_dir),
task_id=re.escape(task_id),
log_dir=log_dir,
process='(\S+)',
run='(\d+)').getpath('process_logdir'))
for path in paths:
try:
process, run = path_re.match(path).groups()
except:
continue
yield process, int(run)
def get_process_logs(self, task_id, log_dir):
for process, run in self.get_process_runs(task_id, log_dir):
for logtype in ('stdout', 'stderr'):
path = (self._pathspec.with_filename(logtype).given(
root=self._root_dir,
task_id=task_id,
log_dir=log_dir,
process=process,
run=run).getpath('process_logdir'))
if os.path.exists(path):
yield path
def get_checkpoint(self, task_id):
return self._pathspec.given(
root=self._root_dir, task_id=task_id).getpath('runner_checkpoint')
def get_process_checkpoints(self, task_id):
matching_paths = glob.glob(
self._pathspec.given(root=self._root_dir,
task_id=task_id,
process='*').getpath('process_checkpoint'))
path_re = re.compile(
self._pathspec.given(
root=re.escape(self._root_dir),
task_id=re.escape(task_id),
process='(\S+)').getpath('process_checkpoint'))
for path in matching_paths:
try:
process, = path_re.match(path).groups()
except:
continue
yield path
class TaskDetector(object):
"""
Helper class in front of TaskPath to detect active/finished/running tasks. Performs no
introspection on the state of a task; merely detects based on file paths on disk.
"""
class MatchingError(Exception): pass
def __init__(self, root):
self._root_dir = root
self._pathspec = TaskPath()
def get_task_ids(self, state=None):
paths = glob.glob(self._pathspec.given(root=self._root_dir,
task_id="*",
state=state or '*')
.getpath('task_path'))
path_re = re.compile(self._pathspec.given(root=re.escape(self._root_dir),
task_id="(\S+)",
state='(\S+)')
.getpath('task_path'))
for path in paths:
try:
task_state, task_id = path_re.match(path).groups()
except:
continue
if state is None or task_state == state:
yield (task_state, task_id)
def get_process_runs(self, task_id, log_dir):
paths = glob.glob(self._pathspec.given(root=self._root_dir,
task_id=task_id,
log_dir=log_dir,
process='*',
run='*')
.getpath('process_logdir'))
path_re = re.compile(self._pathspec.given(root=re.escape(self._root_dir),
task_id=re.escape(task_id),
log_dir=log_dir,
process='(\S+)',
run='(\d+)')
.getpath('process_logdir'))
for path in paths:
try:
process, run = path_re.match(path).groups()
except:
continue
yield process, int(run)
def get_process_logs(self, task_id, log_dir):
for process, run in self.get_process_runs(task_id, log_dir):
for logtype in ('stdout', 'stderr'):
path = (self._pathspec.with_filename(logtype).given(root=self._root_dir,
task_id=task_id,
log_dir=log_dir,
process=process,
run=run)
.getpath('process_logdir'))
if os.path.exists(path):
yield path
def get_checkpoint(self, task_id):
return self._pathspec.given(root=self._root_dir, task_id=task_id).getpath('runner_checkpoint')
def get_process_checkpoints(self, task_id):
matching_paths = glob.glob(self._pathspec.given(root=self._root_dir,
task_id=task_id,
process='*')
.getpath('process_checkpoint'))
path_re = re.compile(self._pathspec.given(root=re.escape(self._root_dir),
task_id=re.escape(task_id),
process='(\S+)')
.getpath('process_checkpoint'))
for path in matching_paths:
try:
process, = path_re.match(path).groups()
except:
continue
yield path
def test_legacy_log_dirs():
assert TaskPath().given(
task_id='foo').getpath('process_logbase') == os.path.join(
TaskPath.DEFAULT_CHECKPOINT_ROOT, 'logs', 'foo')
assert TaskPath(log_dir='sloth_love_chunk').given(
task_id='foo').getpath('process_logbase') == 'sloth_love_chunk'
def kill(cls, task_id, checkpoint_root, force=False, terminal_status=TaskState.KILLED, clock=time):
"""
An implementation of Task killing that doesn't require a fully hydrated TaskRunner object.
Terminal status must be either KILLED or LOST state.
"""
if terminal_status not in (TaskState.KILLED, TaskState.LOST):
raise cls.Error(
"terminal_status must be KILLED or LOST (got %s)" % TaskState._VALUES_TO_NAMES.get(terminal_status)
or terminal_status
)
pathspec = TaskPath(root=checkpoint_root, task_id=task_id)
checkpoint = pathspec.getpath("runner_checkpoint")
state = CheckpointDispatcher.from_file(checkpoint)
if state is None or state.header is None or state.statuses is None:
if force:
log.error("Task has uninitialized TaskState - forcibly finalizing")
cls.finalize_task(pathspec)
return
else:
log.error("Cannot update states in uninitialized TaskState!")
return
ckpt = cls.open_checkpoint(checkpoint, force=force, state=state)
def write_task_state(state):
update = TaskStatus(
state=state, timestamp_ms=int(clock.time() * 1000), runner_pid=os.getpid(), runner_uid=os.getuid()
)
ckpt.write(RunnerCkpt(task_status=update))
def write_process_status(status):
ckpt.write(RunnerCkpt(process_status=status))
if cls.is_task_terminal(state.statuses[-1].state):
log.info("Task is already in terminal state! Finalizing.")
cls.finalize_task(pathspec)
return
with closing(ckpt):
write_task_state(TaskState.ACTIVE)
for process, history in state.processes.items():
process_status = history[-1]
if not cls.is_process_terminal(process_status.state):
if cls.kill_process(state, process):
write_process_status(
ProcessStatus(
process=process,
state=ProcessState.KILLED,
seq=process_status.seq + 1,
return_code=-9,
stop_time=clock.time(),
)
)
else:
if process_status.state is not ProcessState.WAITING:
write_process_status(
ProcessStatus(process=process, state=ProcessState.LOST, seq=process_status.seq + 1)
)
write_task_state(terminal_status)
cls.finalize_task(pathspec)
class CheckpointInspector(object):
def __init__(self, checkpoint_root):
self._path = TaskPath(root=checkpoint_root)
@staticmethod
def get_timestamp(process_record):
if process_record:
for timestamp in ('fork_time', 'start_time', 'stop_time'):
stamp = getattr(process_record, timestamp, None)
if stamp:
return stamp
return 0
def inspect(self, task_id):
"""
Reconstructs the checkpoint stream and returns a CheckpointInspection.
"""
dispatcher = CheckpointDispatcher()
state = RunnerState(processes={})
muxer = ProcessMuxer(self._path.given(task_id=task_id))
runner_processes = []
coordinator_processes = set()
processes = set()
def consume_process_record(record):
if not record.process_status:
return
try:
user_uid = pwd.getpwnam(state.header.user).pw_uid
except KeyError:
log.error('Could not find user: %s' % state.header.user)
return
if record.process_status.state == ProcessState.FORKED:
coordinator_processes.add(
(record.process_status.coordinator_pid, user_uid,
record.process_status.fork_time))
elif record.process_status.state == ProcessState.RUNNING:
processes.add((record.process_status.pid, user_uid,
record.process_status.start_time))
# replay runner checkpoint
runner_pid = None
runner_latest_update = 0
try:
with open(
self._path.given(
task_id=task_id).getpath('runner_checkpoint')) as fp:
with closing(ThriftRecordReader(fp, RunnerCkpt)) as ckpt:
for record in ckpt:
dispatcher.dispatch(state, record)
runner_latest_update = max(
runner_latest_update,
self.get_timestamp(record.process_status))
# collect all bound runners
if record.task_status:
if record.task_status.runner_pid != runner_pid:
runner_processes.append(
(record.task_status.runner_pid,
record.task_status.runner_uid
or 0, record.task_status.timestamp_ms))
runner_pid = record.task_status.runner_pid
elif record.process_status:
consume_process_record(record)
except (IOError, OSError, RecordIO.Error) as err:
log.debug('Error inspecting task runner checkpoint: %s' % err)
return
# register existing processes in muxer
for process_name in state.processes:
muxer.register(process_name)
# read process checkpoints
process_latest_update = runner_latest_update
for record in muxer.select():
process_latest_update = max(
process_latest_update,
self.get_timestamp(record.process_status))
consume_process_record(record)
return CheckpointInspection(
runner_latest_update=runner_latest_update,
process_latest_update=process_latest_update,
runner_processes=runner_processes,
coordinator_processes=coordinator_processes,
processes=processes)