def mesos_cpu_metrics_provider(marathon_service_config, marathon_tasks, mesos_tasks, **kwargs):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = '%s/cpu_last_time' % autoscaling_root
zk_last_cpu_data = '%s/cpu_data' % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time, _ = zk.get(zk_last_time_path)
last_cpu_data, _ = zk.get(zk_last_cpu_data)
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(',') if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
mesos_tasks = {task['id']: task.stats for task in mesos_tasks}
current_time = int(datetime.now().strftime('%s'))
time_delta = current_time - last_time
mesos_cpu_data = {task_id: float(stats.get('cpus_system_time_secs', 0.0) + stats.get(
'cpus_user_time_secs', 0.0)) / (stats.get('cpus_limit', 0) - .1) for task_id, stats in mesos_tasks.items()}
if not mesos_cpu_data:
raise MetricsProviderNoDataError("Couldn't get any cpu data from Mesos")
cpu_data_csv = ','.join('%s:%s' % (cpu_seconds, task_id) for task_id, cpu_seconds in mesos_cpu_data.items())
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv))
zk.set(zk_last_time_path, str(current_time))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(':')
if task_id in mesos_cpu_data:
utilization[task_id] = (mesos_cpu_data[task_id] - float(last_cpu_seconds)) / time_delta
if not utilization:
raise MetricsProviderNoDataError("""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run.""")
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
def get_http_utilization_for_all_tasks(marathon_service_config, marathon_tasks, endpoint, json_mapper):
"""
Gets the mean utilization of a service across all of its tasks by fetching
json from an http endpoint and applying a function that maps it to a
utilization
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param endpoint: The http endpoint to get the stats from
:param json_mapper: A function that takes a dictionary for a task and returns that task's utilization
:returns: the service's mean utilization, from 0 to 1
"""
endpoint = endpoint.lstrip('/')
utilization = []
service = marathon_service_config.get_service()
monkey.patch_socket()
gevent_pool = pool.Pool(20)
jobs = [
gevent_pool.spawn(get_http_utilization_for_a_task, task, service, endpoint, json_mapper)
for task in marathon_tasks
]
gevent.joinall(jobs)
for job in jobs:
if job.value is not None:
utilization.append(job.value)
if not utilization:
raise MetricsProviderNoDataError("Couldn't get any data from http endpoint {} for {}.{}".format(
endpoint, marathon_service_config.service, marathon_service_config.instance,
))
return mean(utilization)
def get_http_utilization_for_all_tasks(marathon_service_config, marathon_tasks, endpoint, json_mapper):
"""
Gets the mean utilization of a service across all of its tasks by fetching
json from an http endpoint and applying a function that maps it to a
utilization
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param endpoint: The http endpoint to get the uwsgi stats from
:param json_mapper: A function that takes a dictionary for a task and returns that task's utilization
:returns: the service's mean utilization, from 0 to 1
"""
endpoint = endpoint.lstrip('/')
utilization = []
for task in marathon_tasks:
try:
utilization.append(json_mapper(get_json_body_from_service(task.host, task.ports[0], endpoint)))
except requests.exceptions.Timeout:
# If we time out querying an endpoint, assume the task is fully loaded
# This won't trigger in the event of DNS error or when a request is refused
# a requests.exception.ConnectionError is raised in those cases
utilization.append(1.0)
log.debug('Recieved a timeout when querying %s on %s:%s. Assuming the service is at full utilization.' % (
marathon_service_config.get_service(), task.host, task.ports[0]))
except Exception as e:
log.debug('Caught excpetion when querying %s on %s:%s : %s' % (
marathon_service_config.get_service(), task.host, task.ports[0], str(e)))
if not utilization:
raise MetricsProviderNoDataError('Couldn\'t get any data from http endpoint %s for %s.%s' % (
endpoint, marathon_service_config.service, marathon_service_config.instance))
return mean(utilization)
async def get_http_utilization_for_all_tasks(
marathon_service_config, marathon_tasks, endpoint, json_mapper
):
"""
Gets the mean utilization of a service across all of its tasks by fetching
json from an http endpoint and applying a function that maps it to a
utilization
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param endpoint: The http endpoint to get the stats from
:param json_mapper: A function that takes a dictionary for a task and returns that task's utilization
:returns: the service's mean utilization, from 0 to 1
"""
endpoint = endpoint.lstrip("/")
utilization = []
service = marathon_service_config.get_service()
instance = marathon_service_config.get_instance()
# Using a single aiohttp session reduces the number of errors seen. Launching
# hundreds of unique sessions seems to increase (timeout) errors.
# However, using 1 session is slower because the default number of connections
# is 100, but still seems to be a sane amount.
async with aiohttp.ClientSession(conn_timeout=10, read_timeout=10) as session:
futures = [
asyncio.ensure_future(
get_http_utilization_for_a_task(
task=task,
service=service,
instance=instance,
endpoint=endpoint,
json_mapper=json_mapper,
session=session,
)
)
for task in marathon_tasks
]
await asyncio.wait(futures)
for future in futures:
result = future.result()
if result is not None:
utilization.append(result)
if not utilization:
raise MetricsProviderNoDataError(
"Couldn't get any data from http endpoint {} for {}.{}".format(
endpoint,
marathon_service_config.service,
marathon_service_config.instance,
)
)
return mean(utilization)
def get_http_utilization_for_all_tasks(marathon_service_config, marathon_tasks,
endpoint, json_mapper):
"""
Gets the mean utilization of a service across all of its tasks by fetching
json from an http endpoint and applying a function that maps it to a
utilization
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param endpoint: The http endpoint to get the uwsgi stats from
:param json_mapper: A function that takes a dictionary for a task and returns that task's utilization
:returns: the service's mean utilization, from 0 to 1
"""
endpoint = endpoint.lstrip('/')
utilization = []
for task in marathon_tasks:
try:
utilization.append(
json_mapper(
get_json_body_from_service(task.host, task.ports[0],
endpoint)))
except requests.exceptions.Timeout:
# If we time out querying an endpoint, assume the task is fully loaded
# This won't trigger in the event of DNS error or when a request is refused
# a requests.exception.ConnectionError is raised in those cases
utilization.append(1.0)
log.debug(
'Recieved a timeout when querying %s on %s:%s. Assuming the service is at full utilization.'
% (marathon_service_config.get_service(), task.host,
task.ports[0]))
except Exception as e:
log.debug('Caught excpetion when querying %s on %s:%s : %s' %
(marathon_service_config.get_service(), task.host,
task.ports[0], str(e)))
if not utilization:
raise MetricsProviderNoDataError(
'Couldn\'t get any data from http endpoint %s for %s.%s' %
(endpoint, marathon_service_config.service,
marathon_service_config.instance))
return mean(utilization)
async def get_http_utilization_for_all_tasks(marathon_service_config,
marathon_tasks, endpoint,
json_mapper):
"""
Gets the mean utilization of a service across all of its tasks by fetching
json from an http endpoint and applying a function that maps it to a
utilization
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param endpoint: The http endpoint to get the stats from
:param json_mapper: A function that takes a dictionary for a task and returns that task's utilization
:returns: the service's mean utilization, from 0 to 1
"""
endpoint = endpoint.lstrip("/")
utilization = []
service = marathon_service_config.get_service()
futures = [
asyncio.ensure_future(
get_http_utilization_for_a_task(task, service, endpoint,
json_mapper))
for task in marathon_tasks
]
await asyncio.wait(futures)
for future in futures:
result = future.result()
if result is not None:
utilization.append(result)
if not utilization:
raise MetricsProviderNoDataError(
"Couldn't get any data from http endpoint {} for {}.{}".format(
endpoint,
marathon_service_config.service,
marathon_service_config.instance,
))
return mean(utilization)
def mesos_cpu_metrics_provider(
marathon_service_config,
system_paasta_config,
marathon_tasks,
mesos_tasks,
log_utilization_data={},
noop=False,
**kwargs,
):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:param log_utilization_data: A dict used to transfer utilization data to autoscale_marathon_instance()
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = "%s/cpu_last_time" % autoscaling_root
zk_last_cpu_data = "%s/cpu_data" % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time = zk.get(zk_last_time_path)[0].decode("utf8")
last_cpu_data = zk.get(zk_last_cpu_data)[0].decode("utf8")
log_utilization_data[last_time] = last_cpu_data
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(",")
if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
futures = [asyncio.ensure_future(task.stats()) for task in mesos_tasks]
if futures:
a_sync.block(asyncio.wait, futures, timeout=60)
def results_or_None(fut):
if fut.exception():
return None
else:
return fut.result()
mesos_tasks_stats = dict(
zip(
[task["id"] for task in mesos_tasks],
[results_or_None(fut) for fut in futures],
))
current_time = int(datetime.now().strftime("%s"))
time_delta = current_time - last_time
mesos_cpu_data = {}
for task_id, stats in mesos_tasks_stats.items():
if stats is not None:
try:
utime = float(stats["cpus_user_time_secs"])
stime = float(stats["cpus_system_time_secs"])
limit = float(stats["cpus_limit"]) - 0.1
mesos_cpu_data[task_id] = (stime + utime) / limit
except KeyError:
pass
if not mesos_cpu_data:
raise MetricsProviderNoDataError(
"Couldn't get any cpu data from Mesos")
cpu_data_csv = ",".join(f"{cpu_seconds}:{task_id}"
for task_id, cpu_seconds in mesos_cpu_data.items())
log_utilization_data[str(current_time)] = cpu_data_csv
if not noop:
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv).encode("utf8"))
zk.set(zk_last_time_path, str(current_time).encode("utf8"))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(":")
if task_id in mesos_cpu_data:
cputime_delta = mesos_cpu_data[task_id] - float(last_cpu_seconds)
utilization[task_id] = cputime_delta / time_delta
if not utilization:
raise MetricsProviderNoDataError(
"""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run."""
)
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
def uwsgi_mapper(json):
workers = json["workers"]
utilization = [
1.0 if worker["status"] != "idle" else 0.0 for worker in workers
]
return mean(utilization)
def mesos_cpu_metrics_provider(
marathon_service_config,
system_paasta_config,
marathon_tasks,
mesos_tasks,
log_utilization_data={},
noop=False,
**kwargs,
):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:param log_utilization_data: A dict used to transfer utilization data to autoscale_marathon_instance()
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = '%s/cpu_last_time' % autoscaling_root
zk_last_cpu_data = '%s/cpu_data' % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time = zk.get(zk_last_time_path)[0].decode('utf8')
last_cpu_data = zk.get(zk_last_cpu_data)[0].decode('utf8')
log_utilization_data[last_time] = last_cpu_data
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(',')
if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
monkey.patch_socket()
jobs = [gevent.spawn(task.stats_callable) for task in mesos_tasks]
gevent.joinall(jobs, timeout=60)
mesos_tasks = dict(
zip([task['id'] for task in mesos_tasks], [job.value for job in jobs]))
current_time = int(datetime.now().strftime('%s'))
time_delta = current_time - last_time
mesos_cpu_data = {}
for task_id, stats in mesos_tasks.items():
if stats is not None:
try:
utime = float(stats['cpus_user_time_secs'])
stime = float(stats['cpus_system_time_secs'])
limit = float(stats['cpus_limit']) - .1
mesos_cpu_data[task_id] = (stime + utime) / limit
except KeyError:
pass
if not mesos_cpu_data:
raise MetricsProviderNoDataError(
"Couldn't get any cpu data from Mesos")
cpu_data_csv = ','.join('%s:%s' % (cpu_seconds, task_id)
for task_id, cpu_seconds in mesos_cpu_data.items())
log_utilization_data[str(current_time)] = cpu_data_csv
if not noop:
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv).encode('utf8'))
zk.set(zk_last_time_path, str(current_time).encode('utf8'))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(':')
if task_id in mesos_cpu_data:
cputime_delta = mesos_cpu_data[task_id] - float(last_cpu_seconds)
if system_paasta_config.get_filter_bogus_mesos_cputime_enabled():
# It is unlikely that the cputime consumed by a task is greater than the CPU limits
# that we enforce (plus 10% of margin). This is a bug in Mesos (tracked in PAASTA-13510)
cpu_burst_allowance = (
1.10 * marathon_service_config.get_cpu_quota() /
marathon_service_config.get_cpu_period())
if cputime_delta > time_delta * cpu_burst_allowance:
log.warning(
'Ignoring potentially bogus cputime values for task {}'
.format(str(task_id)))
log.debug(
'Elapsed time: {}, Enforced CPU limit: {}, CPU time consumed: {}'
.format(
time_delta,
cpu_burst_allowance,
cputime_delta,
), )
continue
utilization[task_id] = cputime_delta / time_delta
if not utilization:
raise MetricsProviderNoDataError(
"""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run."""
)
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
def uwsgi_mapper(json):
workers = json['workers']
utilization = [
1.0 if worker['status'] != 'idle' else 0.0 for worker in workers
]
return mean(utilization)
def mesos_cpu_metrics_provider(
marathon_service_config,
marathon_tasks,
mesos_tasks,
log_utilization_data={},
noop=False,
**kwargs,
):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:param log_utilization_data: A dict used to transfer utilization data to autoscale_marathon_instance()
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = '%s/cpu_last_time' % autoscaling_root
zk_last_cpu_data = '%s/cpu_data' % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time = zk.get(zk_last_time_path)[0].decode('utf8')
last_cpu_data = zk.get(zk_last_cpu_data)[0].decode('utf8')
log_utilization_data[last_time] = last_cpu_data
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(',')
if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
monkey.patch_socket()
jobs = [gevent.spawn(task.stats_callable) for task in mesos_tasks]
gevent.joinall(jobs, timeout=60)
mesos_tasks = dict(
zip([task['id'] for task in mesos_tasks], [job.value for job in jobs]))
current_time = int(datetime.now().strftime('%s'))
time_delta = current_time - last_time
mesos_cpu_data = {}
for task_id, stats in mesos_tasks.items():
if stats is not None:
try:
utime = float(stats['cpus_user_time_secs'])
stime = float(stats['cpus_system_time_secs'])
limit = float(stats['cpus_limit']) - .1
mesos_cpu_data[task_id] = (stime + utime) / limit
except KeyError:
pass
if not mesos_cpu_data:
raise MetricsProviderNoDataError(
"Couldn't get any cpu data from Mesos")
cpu_data_csv = ','.join('%s:%s' % (cpu_seconds, task_id)
for task_id, cpu_seconds in mesos_cpu_data.items())
log_utilization_data[str(current_time)] = cpu_data_csv
if not noop:
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv).encode('utf8'))
zk.set(zk_last_time_path, str(current_time).encode('utf8'))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(':')
if task_id in mesos_cpu_data:
utilization[task_id] = (mesos_cpu_data[task_id] -
float(last_cpu_seconds)) / time_delta
if not utilization:
raise MetricsProviderNoDataError(
"""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run."""
)
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
def mesos_cpu_metrics_provider(marathon_service_config, marathon_tasks,
mesos_tasks, **kwargs):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = '%s/cpu_last_time' % autoscaling_root
zk_last_cpu_data = '%s/cpu_data' % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time, _ = zk.get(zk_last_time_path)
last_cpu_data, _ = zk.get(zk_last_cpu_data)
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(',')
if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
mesos_tasks = {task['id']: task.stats for task in mesos_tasks}
current_time = int(datetime.now().strftime('%s'))
time_delta = current_time - last_time
mesos_cpu_data = {
task_id: float(
stats.get('cpus_system_time_secs', 0.0) +
stats.get('cpus_user_time_secs', 0.0)) /
(stats.get('cpus_limit', 0) - .1)
for task_id, stats in mesos_tasks.items()
}
if not mesos_cpu_data:
raise MetricsProviderNoDataError(
"Couldn't get any cpu data from Mesos")
cpu_data_csv = ','.join('%s:%s' % (cpu_seconds, task_id)
for task_id, cpu_seconds in mesos_cpu_data.items())
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv))
zk.set(zk_last_time_path, str(current_time))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(':')
if task_id in mesos_cpu_data:
utilization[task_id] = (mesos_cpu_data[task_id] -
float(last_cpu_seconds)) / time_delta
if not utilization:
raise MetricsProviderNoDataError(
"""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run."""
)
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
def uwsgi_mapper(json):
workers = json['workers']
utilization = [1.0 if worker['status'] != 'idle' else 0.0 for worker in workers]
return mean(utilization)
def mesos_cpu_metrics_provider(
marathon_service_config,
system_paasta_config,
marathon_tasks,
mesos_tasks,
log_utilization_data={},
noop=False,
**kwargs,
):
"""
Gets the mean cpu utilization of a service across all of its tasks.
:param marathon_service_config: the MarathonServiceConfig to get data from
:param marathon_tasks: Marathon tasks to get data from
:param mesos_tasks: Mesos tasks to get data from
:param log_utilization_data: A dict used to transfer utilization data to autoscale_marathon_instance()
:returns: the service's mean utilization, from 0 to 1
"""
autoscaling_root = compose_autoscaling_zookeeper_root(
service=marathon_service_config.service,
instance=marathon_service_config.instance,
)
zk_last_time_path = '%s/cpu_last_time' % autoscaling_root
zk_last_cpu_data = '%s/cpu_data' % autoscaling_root
with ZookeeperPool() as zk:
try:
last_time = zk.get(zk_last_time_path)[0].decode('utf8')
last_cpu_data = zk.get(zk_last_cpu_data)[0].decode('utf8')
log_utilization_data[last_time] = last_cpu_data
last_time = float(last_time)
last_cpu_data = (datum for datum in last_cpu_data.split(',')
if datum)
except NoNodeError:
last_time = 0.0
last_cpu_data = []
futures = [asyncio.ensure_future(task.stats()) for task in mesos_tasks]
if futures:
a_sync.block(asyncio.wait, futures, timeout=60)
def results_or_None(fut):
if fut.exception():
return None
else:
return fut.result()
mesos_tasks_stats = dict(
zip([task['id'] for task in mesos_tasks],
[results_or_None(fut) for fut in futures]))
current_time = int(datetime.now().strftime('%s'))
time_delta = current_time - last_time
mesos_cpu_data = {}
for task_id, stats in mesos_tasks_stats.items():
if stats is not None:
try:
utime = float(stats['cpus_user_time_secs'])
stime = float(stats['cpus_system_time_secs'])
limit = float(stats['cpus_limit']) - .1
mesos_cpu_data[task_id] = (stime + utime) / limit
except KeyError:
pass
if not mesos_cpu_data:
raise MetricsProviderNoDataError(
"Couldn't get any cpu data from Mesos")
cpu_data_csv = ','.join(f'{cpu_seconds}:{task_id}'
for task_id, cpu_seconds in mesos_cpu_data.items())
log_utilization_data[str(current_time)] = cpu_data_csv
if not noop:
with ZookeeperPool() as zk:
zk.ensure_path(zk_last_cpu_data)
zk.ensure_path(zk_last_time_path)
zk.set(zk_last_cpu_data, str(cpu_data_csv).encode('utf8'))
zk.set(zk_last_time_path, str(current_time).encode('utf8'))
utilization = {}
for datum in last_cpu_data:
last_cpu_seconds, task_id = datum.split(':')
if task_id in mesos_cpu_data:
cputime_delta = mesos_cpu_data[task_id] - float(last_cpu_seconds)
if system_paasta_config.get_filter_bogus_mesos_cputime_enabled():
# It is unlikely that the cputime consumed by a task is greater than the CPU limits
# that we enforce. This is a bug in Mesos (tracked in PAASTA-13510)
max_cpu_allowed = 1 + marathon_service_config.get_cpu_burst_add(
) / marathon_service_config.get_cpus()
task_cpu_usage = cputime_delta / time_delta
if task_cpu_usage > (max_cpu_allowed * 1.1):
log.warning(
'Ignoring potentially bogus cpu usage {} for task {}'.
format(
task_cpu_usage,
str(task_id),
), )
continue
utilization[task_id] = cputime_delta / time_delta
if not utilization:
raise MetricsProviderNoDataError(
"""The mesos_cpu metrics provider doesn't have Zookeeper data for this service.
This is expected for its first run."""
)
task_utilization = utilization.values()
mean_utilization = mean(task_utilization)
return mean_utilization
