def tryRun(self):
while not self.stop:
with throttle(self.scaler.config.scaleInterval):
try:
queuedJobs = self.scaler.leader.getJobs()
queuedJobShapes = [
Shape(wallTime=self.scaler.getAverageRuntime(
jobName=job.jobName,
service=isinstance(job, ServiceJobNode)),
memory=job.memory,
cores=job.cores,
disk=job.disk,
preemptable=job.preemptable)
for job in queuedJobs
]
currentNodeCounts = {}
for nodeShape in self.scaler.nodeShapes:
nodeType = self.scaler.nodeShapeToType[nodeShape]
currentNodeCounts[nodeShape] = len(
self.scaler.leader.provisioner.
getProvisionedWorkers(
nodeType=nodeType,
preemptable=nodeShape.preemptable))
estimatedNodeCounts = self.scaler.getEstimatedNodeCounts(
queuedJobShapes, currentNodeCounts)
self.scaler.updateClusterSize(estimatedNodeCounts)
if self.stats:
self.stats.checkStats()
except:
logger.exception(
"Exception encountered in scaler thread. Making a best-effort "
"attempt to keep going, but things may go wrong from now on."
)
self.scaler.shutDown()
def _startServices(jobGraphsWithServicesToStart,
jobGraphsWithServicesThatHaveStarted,
serviceJobsToStart,
terminate, jobStore):
"""
Thread used to schedule services.
"""
servicesThatAreStarting = set()
servicesRemainingToStartForJob = {}
serviceToJobGraph = {}
while True:
with throttle(1.0):
if terminate.is_set():
logger.debug('Received signal to quit starting services.')
break
try:
jobGraph = jobGraphsWithServicesToStart.get_nowait()
if len(jobGraph.services) > 1:
# Have to fall back to the old blocking behavior to
# ensure entire service "groups" are issued as a whole.
blockUntilServiceGroupIsStarted(jobGraph,
jobGraphsWithServicesThatHaveStarted,
serviceJobsToStart, terminate, jobStore)
continue
# Found a new job that needs to schedule its services.
for serviceJob in jobGraph.services[0]:
serviceToJobGraph[serviceJob] = jobGraph
servicesRemainingToStartForJob[jobGraph] = len(jobGraph.services[0])
# Issue the service jobs all at once.
for serviceJob in jobGraph.services[0]:
logger.debug("Service manager is starting service job: %s, start ID: %s", serviceJob, serviceJob.startJobStoreID)
serviceJobsToStart.put(serviceJob)
# We should now start to monitor these services to see if
# they've started yet.
servicesThatAreStarting.update(jobGraph.services[0])
except Empty:
# No new jobs that need services scheduled.
pass
for serviceJob in list(servicesThatAreStarting):
if not jobStore.fileExists(serviceJob.startJobStoreID):
# Service has started!
servicesThatAreStarting.remove(serviceJob)
parentJob = serviceToJobGraph[serviceJob]
servicesRemainingToStartForJob[parentJob] -= 1
assert servicesRemainingToStartForJob[parentJob] >= 0
del serviceToJobGraph[serviceJob]
# Find if any jobGraphs have had *all* their services started.
jobGraphsToRemove = set()
for jobGraph, remainingServices in servicesRemainingToStartForJob.items():
if remainingServices == 0:
jobGraphsWithServicesThatHaveStarted.put(jobGraph)
jobGraphsToRemove.add(jobGraph)
for jobGraph in jobGraphsToRemove:
del servicesRemainingToStartForJob[jobGraph]
def _startServices(jobDescriptionsWithServicesToStart,
jobDescriptionsWithServicesThatHaveStarted,
jobDescriptionsWithServicesThatHaveFailedToStart,
serviceJobsToStart, terminate, jobStore):
"""
Thread used to schedule services.
"""
# Keep the user informed, but not too informed, as services start up
logLimiter = LocalThrottle(60)
# These are all keyed by service JobDescription object, not ID
# TODO: refactor!
servicesThatAreStarting = set()
servicesRemainingToStartForJob = {}
serviceToParentJobDescription = {}
jobDescriptionsWithFailedServices = set()
while True:
with throttle(1.0):
if terminate.is_set():
logger.debug('Received signal to quit starting services.')
break
try:
jobDesc = jobDescriptionsWithServicesToStart.get_nowait()
if len(list(jobDesc.serviceHostIDsInBatches())) > 1:
# Have to fall back to the old blocking behavior to
# ensure entire service "groups" are issued as a whole.
blockUntilServiceGroupIsStarted(
jobDesc,
jobDescriptionsWithServicesThatHaveStarted,
jobDescriptionsWithServicesThatHaveFailedToStart,
serviceJobsToStart, terminate, jobStore)
continue
# Found a new job that needs to schedule its services.
for onlyBatch in jobDesc.serviceHostIDsInBatches():
# There should be just one batch so we can do it here.
servicesRemainingToStartForJob[jobDesc] = len(
onlyBatch)
for serviceJobID in onlyBatch:
# Load up the service object.
# TODO: cache?
serviceJobDesc = jobStore.load(serviceJobID)
# Remember the parent job
serviceToParentJobDescription[
serviceJobDesc] = jobDesc
# We should now start to monitor this service to see if
# it has started yet.
servicesThatAreStarting.add(serviceJobDesc)
# Send the service JobDescription off to be started
logger.debug(
'Service manager is starting service job: %s, start ID: %s',
serviceJobDesc, serviceJobDesc.startJobStoreID)
serviceJobsToStart.put(serviceJobDesc)
except Empty:
# No new jobs that need services scheduled.
pass
pendingServiceCount = len(servicesThatAreStarting)
if pendingServiceCount > 0 and logLimiter.throttle(False):
logger.debug('%d services are starting...',
pendingServiceCount)
for serviceJobDesc in list(servicesThatAreStarting):
if not jobStore.fileExists(serviceJobDesc.startJobStoreID):
# Service has started (or failed)
logger.debug(
'Service %s has removed %s and is therefore started',
serviceJobDesc, serviceJobDesc.startJobStoreID)
servicesThatAreStarting.remove(serviceJobDesc)
parentJob = serviceToParentJobDescription[
serviceJobDesc]
servicesRemainingToStartForJob[parentJob] -= 1
assert servicesRemainingToStartForJob[parentJob] >= 0
del serviceToParentJobDescription[serviceJobDesc]
if not jobStore.fileExists(
serviceJobDesc.errorJobStoreID):
logger.error(
'Service %s has immediately failed before it could be used',
serviceJobDesc)
# It probably hasn't fileld in the promise that the job that uses the service needs.
jobDescriptionsWithFailedServices.add(parentJob)
# Find if any JobDescriptions have had *all* their services started.
jobDescriptionsToRemove = set()
for jobDesc, remainingServices in servicesRemainingToStartForJob.items(
):
if remainingServices == 0:
if jobDesc in jobDescriptionsWithFailedServices:
logger.error(
'Job %s has had all its services try to start, but at least one failed',
jobDesc)
jobDescriptionsWithServicesThatHaveFailedToStart.put(
jobDesc)
else:
logger.debug('Job %s has all its services started',
jobDesc)
jobDescriptionsWithServicesThatHaveStarted.put(
jobDesc)
jobDescriptionsToRemove.add(jobDesc)
for jobDesc in jobDescriptionsToRemove:
del servicesRemainingToStartForJob[jobDesc]
def __start_services(self) -> None:
"""
Thread used to schedule services.
"""
# Keep the user informed, but not too informed, as services start up
log_limiter = LocalThrottle(60)
# These are all keyed by ID
starting_services = set()
remaining_services_by_client = {}
service_to_client = {}
clients_with_failed_services = set()
while True:
with throttle(1.0):
if self.__terminate.is_set():
logger.debug('Received signal to quit starting services.')
break
try:
client_id = self.__clients_in.get_nowait()
client = self.__toil_state.get_job(client_id)
host_id_batches = list(client.serviceHostIDsInBatches())
logger.debug(
"Service manager processing client %s with %d batches of services",
client, len(host_id_batches))
if len(host_id_batches) > 1:
# Have to fall back to the old blocking behavior to
# ensure entire service "groups" are issued as a whole.
self.__start_batches_blocking(client_id)
continue
# Found a new job that needs to schedule its services.
for batch in host_id_batches:
# There should be just one batch so we can do it here.
remaining_services_by_client[client_id] = len(batch)
for service_id in batch:
# Load up the service object.
service_job_desc = self.__toil_state.get_job(
service_id)
# Remember the parent job
service_to_client[service_id] = client_id
# We should now start to monitor this service to see if
# it has started yet.
starting_services.add(service_id)
# Send the service JobDescription off to be started
logger.debug(
'Service manager is starting service job: %s, start ID: %s',
service_job_desc,
service_job_desc.startJobStoreID)
self.__services_out.put(service_id)
except Empty:
# No new jobs that need services scheduled.
pass
pending_service_count = len(starting_services)
if pending_service_count > 0 and log_limiter.throttle(False):
logger.debug('%d services are starting...',
pending_service_count)
for service_id in list(starting_services):
service_job_desc = self.__toil_state.get_job(service_id)
if not self.__job_store.fileExists(
service_job_desc.startJobStoreID):
# Service has started (or failed)
logger.debug(
'Service %s has removed %s and is therefore started',
service_job_desc, service_job_desc.startJobStoreID)
starting_services.remove(service_id)
client_id = service_to_client[service_id]
remaining_services_by_client[client_id] -= 1
assert remaining_services_by_client[client_id] >= 0
del service_to_client[service_id]
if not self.__job_store.fileExists(
service_job_desc.errorJobStoreID):
logger.error(
'Service %s has immediately failed before it could be used',
service_job_desc)
# It probably hasn't fileld in the promise that the job that uses the service needs.
clients_with_failed_services.add(client_id)
# Find if any clients have had *all* their services started.
ready_clients = set()
for client_id, remainingServices in remaining_services_by_client.items(
):
if remainingServices == 0:
if client_id in clients_with_failed_services:
logger.error(
'Job %s has had all its services try to start, but at least one failed',
self.__toil_state.get_job(client_id))
self.__failed_clients_out.put(client_id)
else:
logger.debug('Job %s has all its services started',
self.__toil_state.get_job(client_id))
self.__clients_out.put(client_id)
ready_clients.add(client_id)
for client_id in ready_clients:
del remaining_services_by_client[client_id]