def read(args, options):
"""Replay a thermos checkpoint.
Usage: thermos read [options] checkpoint_filename
Options:
--simple Do not replay the full task state machine. Only print out the contents of
each checkpoint log message.
"""
if len(args) != 1:
app.error('Expected one checkpoint file, got %s' % len(args))
if not os.path.exists(args[0]):
app.error('Could not find %s' % args[0])
dispatcher = CheckpointDispatcher()
state = RunnerState(processes={})
with open(args[0], 'r') as fp:
try:
for record in ThriftRecordReader(fp, RunnerCkpt):
if not options.simple:
dispatcher.dispatch(state, record)
else:
print('CKPT: %s' % record)
except RecordIO.Error as err:
print("Failed to recover from %s: %s" % (fp.name, err))
return
if not options.simple:
if state is None or state.header is None:
print('Checkpoint stream CORRUPT or outdated format')
return
print('Recovered Task Header:')
print(' id: %s' % state.header.task_id)
print(' user: %s' % state.header.user)
print(' host: %s' % state.header.hostname)
print(' sandbox: %s' % state.header.sandbox)
if state.header.ports:
print(' ports: %s' %
' '.join('%s->%s' % (name, port)
for (name, port) in state.header.ports.items()))
print('Recovered Task States:')
for task_status in state.statuses:
print(
' %s [pid: %d] => %s' %
(time.asctime(time.localtime(task_status.timestamp_ms /
1000.0)), task_status.runner_pid,
TaskState._VALUES_TO_NAMES[task_status.state]))
print('Recovered Processes:')
for process, process_history in state.processes.items():
print(' %s runs: %s' % (process, len(process_history)))
for k in reversed(range(len(process_history))):
run = process_history[k]
print(
' %2d: pid=%d, rc=%s, finish:%s, state:%s' %
(k, run.pid, run.return_code if run.return_code is not None
else '', time.asctime(time.localtime(run.stop_time))
if run.stop_time else 'None',
ProcessState._VALUES_TO_NAMES.get(run.state, 'Unknown')))
def __init__(self, pathspec, task_id):
self._task_id = task_id
self._dispatcher = CheckpointDispatcher()
self._runnerstate = RunnerState(processes={})
self._runner_ckpt = pathspec.given(
task_id=task_id).getpath('runner_checkpoint')
self._active_file, self._finished_file = (pathspec.given(
task_id=task_id, state=state).getpath('task_path')
for state in ('active',
'finished'))
self._ckpt_head = 0
self._apply_states()
self._lock = threading.Lock()
def main(args):
values = app.get_options()
if len(args) > 0:
print >> sys.stderr, "ERROR: unrecognized arguments: %s\n" % (
" ".join(args))
app.help()
sys.exit(1)
if not values.ckpt:
print >> sys.stderr, "ERROR: must supply --checkpoint"
app.help()
sys.exit(1)
fp = file(values.ckpt, "r")
rr = ThriftRecordReader(fp, RunnerCkpt)
wrs = RunnerState(processes={})
dispatcher = CheckpointDispatcher()
try:
for wts in rr:
print 'Recovering: ', wts
if values.assemble is True:
dispatcher.dispatch(wrs, wts)
except RecordIO.Error as err:
print 'Error recovering checkpoint stream: %s' % err
return
print '\n\n\n'
if values.assemble:
print 'Recovered Task Header'
pprint.pprint(wrs.header, indent=4)
print '\nRecovered Task States'
for task_status in wrs.statuses:
print ' %s [pid: %d] => %s' % (
time.asctime(time.localtime(task_status.timestamp_ms /
1000.0)), task_status.runner_pid,
TaskState._VALUES_TO_NAMES[task_status.state])
print '\nRecovered Processes'
pprint.pprint(wrs.processes, indent=4)
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 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)
