from .. import \
arvados_node_fqdn, arvados_node_mtime, arvados_timestamp, timestamp_fresh, \
- arvados_node_missing, _retry
+ arvados_node_missing, RetryMixin
from ...clientactor import _notify_subscribers
from ... import config
+from .transitions import transitions
-class ComputeNodeStateChangeBase(config.actor_class):
+class ComputeNodeStateChangeBase(config.actor_class, RetryMixin):
"""Base class for actors that change a compute node's state.
This base class takes care of retrying changes and notifying
subscribers when the change is finished.
"""
- def __init__(self, logger_name, cloud_client, arvados_client, timer_actor,
+ def __init__(self, cloud_client, arvados_client, timer_actor,
retry_wait, max_retry_wait):
super(ComputeNodeStateChangeBase, self).__init__()
- self._later = self.actor_ref.proxy()
- self._logger = logging.getLogger(logger_name)
- self._cloud = cloud_client
+ RetryMixin.__init__(self, retry_wait, max_retry_wait,
+ None, cloud_client, timer_actor)
+ self._later = self.actor_ref.tell_proxy()
self._arvados = arvados_client
- self._timer = timer_actor
- self.min_retry_wait = retry_wait
- self.max_retry_wait = max_retry_wait
- self.retry_wait = retry_wait
self.subscribers = set()
+ def _set_logger(self):
+ self._logger = logging.getLogger("%s.%s" % (self.__class__.__name__, self.actor_urn[33:]))
+
+ def on_start(self):
+ self._set_logger()
+
def _finished(self):
- _notify_subscribers(self._later, self.subscribers)
+ if self.subscribers is None:
+ raise Exception("Actor tried to finish twice")
+ _notify_subscribers(self.actor_ref.proxy(), self.subscribers)
self.subscribers = None
+ self._logger.info("finished")
def subscribe(self, subscriber):
if self.subscribers is None:
try:
- subscriber(self._later)
+ subscriber(self.actor_ref.proxy())
except pykka.ActorDeadError:
pass
else:
'last_action': explanation}},
).execute()
+ @staticmethod
+ def _finish_on_exception(orig_func):
+ @functools.wraps(orig_func)
+ def finish_wrapper(self, *args, **kwargs):
+ try:
+ return orig_func(self, *args, **kwargs)
+ except Exception as error:
+ self._logger.error("Actor error %s", error)
+ self._finished()
+ return finish_wrapper
+
class ComputeNodeSetupActor(ComputeNodeStateChangeBase):
"""Actor to create and set up a cloud compute node.
cloud_size, arvados_node=None,
retry_wait=1, max_retry_wait=180):
super(ComputeNodeSetupActor, self).__init__(
- 'arvnodeman.nodeup', cloud_client, arvados_client, timer_actor,
+ cloud_client, arvados_client, timer_actor,
retry_wait, max_retry_wait)
self.cloud_size = cloud_size
self.arvados_node = None
else:
self._later.prepare_arvados_node(arvados_node)
- @_retry(config.ARVADOS_ERRORS)
+ @ComputeNodeStateChangeBase._finish_on_exception
+ @RetryMixin._retry(config.ARVADOS_ERRORS)
def create_arvados_node(self):
self.arvados_node = self._arvados.nodes().create(body={}).execute()
self._later.create_cloud_node()
- @_retry(config.ARVADOS_ERRORS)
+ @ComputeNodeStateChangeBase._finish_on_exception
+ @RetryMixin._retry(config.ARVADOS_ERRORS)
def prepare_arvados_node(self, node):
self.arvados_node = self._clean_arvados_node(
node, "Prepared by Node Manager")
self._later.create_cloud_node()
- @_retry()
+ @ComputeNodeStateChangeBase._finish_on_exception
+ @RetryMixin._retry()
def create_cloud_node(self):
- self._logger.info("Creating cloud node with size %s.",
+ self._logger.info("Sending create_node request for node size %s.",
self.cloud_size.name)
self.cloud_node = self._cloud.create_node(self.cloud_size,
self.arvados_node)
self._logger.info("Cloud node %s created.", self.cloud_node.id)
self._later.update_arvados_node_properties()
- @_retry(config.ARVADOS_ERRORS)
+ @ComputeNodeStateChangeBase._finish_on_exception
+ @RetryMixin._retry(config.ARVADOS_ERRORS)
def update_arvados_node_properties(self):
"""Tell Arvados some details about the cloud node.
self._logger.info("%s updated properties.", self.arvados_node['uuid'])
self._later.post_create()
- @_retry()
+ @RetryMixin._retry()
def post_create(self):
self._cloud.post_create_node(self.cloud_node)
self._logger.info("%s post-create work done.", self.cloud_node.id)
# eligible. Normal shutdowns based on job demand should be
# cancellable; shutdowns based on node misbehavior should not.
super(ComputeNodeShutdownActor, self).__init__(
- 'arvnodeman.nodedown', cloud_client, arvados_client, timer_actor,
+ cloud_client, arvados_client, timer_actor,
retry_wait, max_retry_wait)
self._monitor = node_monitor.proxy()
self.cloud_node = self._monitor.cloud_node.get()
self.cancel_reason = None
self.success = None
+ def _set_logger(self):
+ self._logger = logging.getLogger("%s.%s.%s" % (self.__class__.__name__, self.actor_urn[33:], self.cloud_node.name))
+
def on_start(self):
+ super(ComputeNodeShutdownActor, self).on_start()
self._later.shutdown_node()
def _arvados_node(self):
def cancel_shutdown(self, reason):
self.cancel_reason = reason
- self._logger.info("Cloud node %s shutdown cancelled: %s.",
- self.cloud_node.id, reason)
+ self._logger.info("Shutdown cancelled: %s.", reason)
self._finished(success_flag=False)
- def _stop_if_window_closed(orig_func):
+ def _cancel_on_exception(orig_func):
@functools.wraps(orig_func)
- def stop_wrapper(self, *args, **kwargs):
- if (self.cancellable and
- (not self._monitor.shutdown_eligible().get())):
- self._later.cancel_shutdown(self.WINDOW_CLOSED)
- return None
- else:
+ def finish_wrapper(self, *args, **kwargs):
+ try:
return orig_func(self, *args, **kwargs)
- return stop_wrapper
+ except Exception as error:
+ self._logger.error("Actor error %s", error)
+ self._later.cancel_shutdown("Unhandled exception %s" % error)
+ return finish_wrapper
- @_stop_if_window_closed
- @_retry()
+ @_cancel_on_exception
+ @RetryMixin._retry()
def shutdown_node(self):
+ self._logger.info("Starting shutdown")
+ arv_node = self._arvados_node()
if not self._cloud.destroy_node(self.cloud_node):
if self._cloud.broken(self.cloud_node):
self._later.cancel_shutdown(self.NODE_BROKEN)
+ return
else:
# Force a retry.
raise cloud_types.LibcloudError("destroy_node failed")
- self._logger.info("Cloud node %s shut down.", self.cloud_node.id)
- arv_node = self._arvados_node()
+ self._logger.info("Shutdown success")
if arv_node is None:
self._finished(success_flag=True)
else:
self._later.clean_arvados_node(arv_node)
- @_retry(config.ARVADOS_ERRORS)
+ @ComputeNodeStateChangeBase._finish_on_exception
+ @RetryMixin._retry(config.ARVADOS_ERRORS)
def clean_arvados_node(self, arvados_node):
self._clean_arvados_node(arvados_node, "Shut down by Node Manager")
self._finished(success_flag=True)
- # Make the decorator available to subclasses.
- _stop_if_window_closed = staticmethod(_stop_if_window_closed)
-
class ComputeNodeUpdateActor(config.actor_class):
"""Actor to dispatch one-off cloud management requests.
this to perform maintenance tasks on themselves. Having a
dedicated actor for this gives us the opportunity to control the
flow of requests; e.g., by backing off when errors occur.
-
- This actor is most like a "traditional" Pykka actor: there's no
- subscribing, but instead methods return real driver results. If
- you're interested in those results, you should get them from the
- Future that the proxy method returns. Be prepared to handle exceptions
- from the cloud driver when you do.
"""
def __init__(self, cloud_factory, max_retry_wait=180):
super(ComputeNodeUpdateActor, self).__init__()
self.error_streak = 0
self.next_request_time = time.time()
+ def _set_logger(self):
+ self._logger = logging.getLogger("%s.%s" % (self.__class__.__name__, self.actor_urn[33:]))
+
+ def on_start(self):
+ self._set_logger()
+
def _throttle_errors(orig_func):
@functools.wraps(orig_func)
def throttle_wrapper(self, *args, **kwargs):
try:
result = orig_func(self, *args, **kwargs)
except Exception as error:
- self.error_streak += 1
- self.next_request_time += min(2 ** self.error_streak,
- self.max_retry_wait)
- raise
+ if self._cloud.is_cloud_exception(error):
+ self.error_streak += 1
+ self.next_request_time += min(2 ** self.error_streak,
+ self.max_retry_wait)
+ self._logger.warn(
+ "Unhandled exception: %s", error, exc_info=error)
else:
self.error_streak = 0
return result
boot_fail_after=1800
):
super(ComputeNodeMonitorActor, self).__init__()
- self._later = self.actor_ref.proxy()
- self._logger = logging.getLogger('arvnodeman.computenode')
+ self._later = self.actor_ref.tell_proxy()
self._last_log = None
self._shutdowns = shutdown_timer
self._cloud_node_fqdn = cloud_fqdn_func
self.last_shutdown_opening = None
self._later.consider_shutdown()
+ def _set_logger(self):
+ self._logger = logging.getLogger("%s.%s.%s" % (self.__class__.__name__, self.actor_urn[33:], self.cloud_node.name))
+
+ def on_start(self):
+ self._set_logger()
+ self._timer.schedule(self.cloud_node_start_time + self.boot_fail_after, self._later.consider_shutdown)
+
def subscribe(self, subscriber):
self.subscribers.add(subscriber)
self._last_log = msg
self._logger.debug(msg, *args)
- def in_state(self, *states):
- # Return a boolean to say whether or not our Arvados node record is in
- # one of the given states. If state information is not
- # available--because this node has no Arvados record, the record is
- # stale, or the record has no state information--return None.
- if (self.arvados_node is None) or not timestamp_fresh(
- arvados_node_mtime(self.arvados_node), self.node_stale_after):
- return None
+ def get_state(self):
+ """Get node state, one of ['unpaired', 'busy', 'idle', 'down']."""
+
+ # If this node is not associated with an Arvados node, return 'unpaired'.
+ if self.arvados_node is None:
+ return 'unpaired'
+
state = self.arvados_node['crunch_worker_state']
- if not state:
- return None
- result = state in states
- if state == 'idle':
- result = result and not self.arvados_node['job_uuid']
- return result
+
+ # If state information is not available because it is missing or the
+ # record is stale, return 'down'.
+ if not state or not timestamp_fresh(arvados_node_mtime(self.arvados_node),
+ self.node_stale_after):
+ state = 'down'
+
+ # There's a window between when a node pings for the first time and the
+ # value of 'slurm_state' is synchronized by crunch-dispatch. In this
+ # window, the node will still report as 'down'. Check that
+ # first_ping_at is truthy and consider the node 'idle' during the
+ # initial boot grace period.
+ if (state == 'down' and
+ self.arvados_node['first_ping_at'] and
+ timestamp_fresh(self.cloud_node_start_time,
+ self.boot_fail_after) and
+ not self._cloud.broken(self.cloud_node)):
+ state = 'idle'
+
+ # "missing" means last_ping_at is stale, this should be
+ # considered "down"
+ if arvados_node_missing(self.arvados_node, self.node_stale_after):
+ state = 'down'
+
+ # Turns out using 'job_uuid' this way is a bad idea. The node record
+ # is assigned the job_uuid before the job is locked (which removes it
+ # from the queue) which means the job will be double-counted as both in
+ # the wishlist and but also keeping a node busy. This end result is
+ # excess nodes being booted.
+ #if state == 'idle' and self.arvados_node['job_uuid']:
+ # state = 'busy'
+
+ return state
+
+ def in_state(self, *states):
+ return self.get_state() in states
def shutdown_eligible(self):
- if not self._shutdowns.window_open():
- return False
- if self.arvados_node is None:
- # Node is unpaired.
- # If it hasn't pinged Arvados after boot_fail seconds, shut it down
- return not timestamp_fresh(self.cloud_node_start_time, self.boot_fail_after)
- missing = arvados_node_missing(self.arvados_node, self.node_stale_after)
- if missing and self._cloud.broken(self.cloud_node):
- # Node is paired, but Arvados says it is missing and the cloud says the node
- # is in an error state, so shut it down.
- return True
- if missing is None and self._cloud.broken(self.cloud_node):
- self._logger.warning(
- "cloud reports broken node, but paired node %s never pinged "
- "(bug?) -- skipped check for node_stale_after",
- self.arvados_node['uuid'])
- return self.in_state('idle')
+ """Determine if node is candidate for shut down.
+
+ Returns a tuple of (boolean, string) where the first value is whether
+ the node is candidate for shut down, and the second value is the
+ reason for the decision.
+ """
+
+ # Collect states and then consult state transition table whether we
+ # should shut down. Possible states are:
+ # crunch_worker_state = ['unpaired', 'busy', 'idle', 'down']
+ # window = ["open", "closed"]
+ # boot_grace = ["boot wait", "boot exceeded"]
+ # idle_grace = ["not idle", "idle wait", "idle exceeded"]
+
+ if self.arvados_node and not timestamp_fresh(arvados_node_mtime(self.arvados_node), self.node_stale_after):
+ return (False, "node state is stale")
+
+ crunch_worker_state = self.get_state()
+
+ window = "open" if self._shutdowns.window_open() else "closed"
+
+ if timestamp_fresh(self.cloud_node_start_time, self.boot_fail_after):
+ boot_grace = "boot wait"
+ else:
+ boot_grace = "boot exceeded"
+
+ # API server side not implemented yet.
+ idle_grace = 'idle exceeded'
+
+ node_state = (crunch_worker_state, window, boot_grace, idle_grace)
+ t = transitions[node_state]
+ if t is not None:
+ # yes, shutdown eligible
+ return (True, "node state is %s" % (node_state,))
+ else:
+ # no, return a reason
+ return (False, "node state is %s" % (node_state,))
def consider_shutdown(self):
- next_opening = self._shutdowns.next_opening()
- if self.shutdown_eligible():
- self._debug("Node %s suggesting shutdown.", self.cloud_node.id)
- _notify_subscribers(self._later, self.subscribers)
- elif self._shutdowns.window_open():
- self._debug("Node %s shutdown window open but node busy.",
- self.cloud_node.id)
- elif self.last_shutdown_opening != next_opening:
- self._debug("Node %s shutdown window closed. Next at %s.",
- self.cloud_node.id, time.ctime(next_opening))
- self._timer.schedule(next_opening, self._later.consider_shutdown)
- self.last_shutdown_opening = next_opening
+ try:
+ eligible, reason = self.shutdown_eligible()
+ next_opening = self._shutdowns.next_opening()
+ if eligible:
+ self._debug("Suggesting shutdown because %s", reason)
+ _notify_subscribers(self.actor_ref.proxy(), self.subscribers)
+ else:
+ self._debug("Not eligible for shut down because %s", reason)
+
+ if self.last_shutdown_opening != next_opening:
+ self._debug("Shutdown window closed. Next at %s.",
+ time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(next_opening)))
+ self._timer.schedule(next_opening, self._later.consider_shutdown)
+ self.last_shutdown_opening = next_opening
+ except Exception:
+ self._logger.exception("Unexpected exception")
def offer_arvados_pair(self, arvados_node):
first_ping_s = arvados_node.get('first_ping_at')
if (self.arvados_node is not None) or (not first_ping_s):
return None
- elif ((arvados_node['ip_address'] in self.cloud_node.private_ips) and
+ elif ((arvados_node['info'].get('ec2_instance_id') == self._cloud.node_id(self.cloud_node)) and
(arvados_timestamp(first_ping_s) >= self.cloud_node_start_time)):
self._later.update_arvados_node(arvados_node)
return self.cloud_node.id
projects / arvados.git / blobdiff