def run_selected_algorithm(timeseries, metric_name, metric_expiration_time,
metric_min_average, metric_min_average_seconds,
metric_trigger, alert_threshold, metric_alerters,
autoaggregate, autoaggregate_value, algorithm):
"""
Filter timeseries and run selected algorithm.
"""
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: assigning in algoritms.py - %s, %s' %
(metric_name, algorithm))
# Get rid of short series
# @modified 20190312 - Task #2862: Allow Boundary to analyse short time series
# https://github.com/earthgecko/skyline/issues/88
# Allow class as TooShort if the algorithm is detect_drop_off_cliff
if algorithm == 'detect_drop_off_cliff':
if len(timeseries) < MIN_TOLERABLE_LENGTH:
if ENABLE_BOUNDARY_DEBUG:
logger.debug('debug :: TooShort - %s, %s' %
(metric_name, algorithm))
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
if ENABLE_BOUNDARY_DEBUG:
logger.debug('debug :: Stale - %s, %s' % (metric_name, algorithm))
raise Stale()
# Get rid of boring series
if algorithm == 'detect_drop_off_cliff' or algorithm == 'less_than':
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
if ENABLE_BOUNDARY_DEBUG:
logger.debug('debug :: Boring - %s, %s' %
(metric_name, algorithm))
raise Boring()
if autoaggregate:
if ENABLE_BOUNDARY_DEBUG:
logger.debug('debug :: auto aggregating %s for %s' %
(metric_name, algorithm))
try:
agg_timeseries = autoaggregate_ts(timeseries, autoaggregate_value)
if ENABLE_BOUNDARY_DEBUG:
logger.debug(
'debug :: aggregated_timeseries returned %s for %s' %
(metric_name, algorithm))
except Exception as e:
agg_timeseries = []
if ENABLE_BOUNDARY_DEBUG:
logger.error('Algorithm error: %s' % traceback.format_exc())
logger.error('error: %e' % e)
logger.debug(
'debug error - autoaggregate excpection %s for %s' %
(metric_name, algorithm))
if len(agg_timeseries) > 10:
timeseries = agg_timeseries
else:
if ENABLE_BOUNDARY_DEBUG:
logger.debug('debug :: TooShort - %s, %s' %
(metric_name, algorithm))
raise TooShort()
# @modified 20190312 - Task #2862: Allow Boundary to analyse short time series
# https://github.com/earthgecko/skyline/issues/88
# if len(timeseries) < 10:
if len(timeseries) < 1:
if ENABLE_BOUNDARY_DEBUG:
logger.debug(
'debug :: timeseries too short - %s - timeseries length - %s' %
(metric_name, str(len(timeseries))))
raise TooShort()
try:
ensemble = [
globals()[algorithm](timeseries, metric_name,
metric_expiration_time, metric_min_average,
metric_min_average_seconds, metric_trigger)
]
if ensemble.count(True) == 1:
if ENABLE_BOUNDARY_DEBUG:
logger.debug(
# @modified 20200624 - Task #3594: Add timestamp to ENABLE_BOUNDARY_DEBUG output
# Feature #3532: Sort all time series
# Added timestamp to debug output
# 'debug :: anomalous datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s' % (
# str(timeseries[-1][1]),
'debug :: anomalous at %s with datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s'
%
(str(timeseries[-1][0]), str(timeseries[-1][1]),
str(metric_name), str(metric_expiration_time),
str(metric_min_average), str(metric_min_average_seconds),
str(metric_trigger), str(alert_threshold),
str(metric_alerters), str(algorithm)))
return True, ensemble, timeseries[-1][
1], metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm
else:
if ENABLE_BOUNDARY_DEBUG:
logger.debug(
# @modified 20200624 - Task #3594: Add timestamp to ENABLE_BOUNDARY_DEBUG output
# Feature #3532: Sort all time series
# Added timestamp to debug output
# 'debug :: not anomalous datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s' % (
# str(timeseries[-1][1]),
'debug :: not anomalous at %s with datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s'
%
(str(timeseries[-1][0]), str(timeseries[-1][1]),
str(metric_name), str(metric_expiration_time),
str(metric_min_average), str(metric_min_average_seconds),
str(metric_trigger), str(alert_threshold),
str(metric_alerters), str(algorithm)))
return False, ensemble, timeseries[-1][
1], metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
return False, [], 1, metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm
def run_selected_algorithm(timeseries, metric_name):
"""
Filter timeseries and run selected algorithm.
"""
# @added 20180807 - Feature #2492: alert on stale metrics
# Determine if a metric has stopped sending data and if so add to the
# analyzer.alert_on_stale_metrics Redis set
if ALERT_ON_STALE_METRICS:
add_to_alert_on_stale_metrics = False
# @modified 20180816 - Feature #2492: alert on stale metrics
# Added try and except to prevent some errors that are encounter between
# 00:14 and 00:17 on some days
# Traceback (most recent call last):
# File "/opt/skyline/github/skyline/skyline/analyzer/analyzer.py", line 394, in spin_process
# anomalous, ensemble, datapoint = run_selected_algorithm(timeseries, metric_name)
# File "/opt/skyline/github/skyline/skyline/analyzer/algorithms.py", line 530, in run_selected_algorithm
# if int(time()) - int(timeseries[-1][0]) >= ALERT_ON_STALE_PERIOD:
# IndexError: list index out of range
try:
if int(time()) - int(timeseries[-1][0]) >= ALERT_ON_STALE_PERIOD:
add_to_alert_on_stale_metrics = True
except:
# @modified 20180816 -
# Feature #2492: alert on stale metrics
add_to_alert_on_stale_metrics = False
try:
if int(time()) - int(timeseries[-1][0]) >= STALE_PERIOD:
add_to_alert_on_stale_metrics = False
except:
add_to_alert_on_stale_metrics = False
if add_to_alert_on_stale_metrics:
try:
redis_conn.ping()
except:
from redis import StrictRedis
if REDIS_PASSWORD:
redis_conn = StrictRedis(
password=REDIS_PASSWORD,
unix_socket_path=REDIS_SOCKET_PATH)
else:
redis_conn = StrictRedis(
unix_socket_path=REDIS_SOCKET_PATH)
try:
redis_conn.sadd('analyzer.alert_on_stale_metrics', metric_name)
except:
pass
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
raise Boring()
# RUN_OPTIMIZED_WORKFLOW - replaces the original ensemble method:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
# which runs all timeseries through all ALGORITHMS
final_ensemble = []
number_of_algorithms_triggered = 0
number_of_algorithms_run = 0
number_of_algorithms = len(ALGORITHMS)
maximum_false_count = number_of_algorithms - CONSENSUS + 1
# logger.info('the maximum_false_count is %s, above which CONSENSUS cannot be achieved' % (str(maximum_false_count)))
consensus_possible = True
# DEVELOPMENT: this is for a development version of analyzer only
if skyline_app == 'analyzer_dev':
time_all_algorithms = True
else:
time_all_algorithms = False
algorithm_tmp_file_prefix = '%s/%s.' % (SKYLINE_TMP_DIR, skyline_app)
for algorithm in ALGORITHMS:
if consensus_possible:
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
try:
algorithm_result = [
globals()[test_algorithm](timeseries)
for test_algorithm in run_algorithm
]
except:
# logger.error('%s failed' % (algorithm))
algorithm_result = [None]
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [False]
# logger.info('CONSENSUS NOT ACHIEVABLE - skipping %s' % (str(algorithm)))
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
# logger.info('algorithm %s triggerred' % (str(algorithm)))
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
if not RUN_OPTIMIZED_WORKFLOW:
continue
if time_all_algorithms:
continue
if ENABLE_ALL_ALGORITHMS_RUN_METRICS:
continue
# true_count = final_ensemble.count(True)
# false_count = final_ensemble.count(False)
# logger.info('current false_count %s' % (str(false_count)))
if final_ensemble.count(False) >= maximum_false_count:
consensus_possible = False
# logger.info('CONSENSUS cannot be reached as %s algorithms have already not been triggered' % (str(false_count)))
# skip_algorithms_count = number_of_algorithms - number_of_algorithms_run
# logger.info('skipping %s algorithms' % (str(skip_algorithms_count)))
# logger.info('final_ensemble: %s' % (str(final_ensemble)))
try:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
ensemble = final_ensemble
threshold = len(ensemble) - CONSENSUS
if ensemble.count(False) <= threshold:
if ENABLE_SECOND_ORDER:
if is_anomalously_anomalous(metric_name, ensemble,
timeseries[-1][1]):
return True, ensemble, timeseries[-1][1]
else:
return True, ensemble, timeseries[-1][1]
return False, ensemble, timeseries[-1][1]
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
return False, [], 1
def run_selected_batch_algorithm(timeseries, metric_name,
run_negatives_present):
"""
Filter timeseries and run selected algorithm.
"""
try:
from settings import BATCH_PROCESSING_STALE_PERIOD
# @modified 20200816 - Feature #3678: SNAB - anomalyScore
# Renamed to avoid confusion
# STALE_PERIOD = int(BATCH_PROCESSING_STALE_PERIOD)
BATCH_PROCESSING_STALE_PERIOD = int(BATCH_PROCESSING_STALE_PERIOD)
except:
BATCH_PROCESSING_STALE_PERIOD = 86400
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
raise TooShort()
# Get rid of stale series
# @modified 20200816 - Feature #3678: SNAB - anomalyScore
# Renamed to avoid confusion
# if time() - timeseries[-1][0] > BATCH_PROCESSING_STALE_PERIOD:
if time() - timeseries[-1][0] > BATCH_PROCESSING_STALE_PERIOD:
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
raise Boring()
# RUN_OPTIMIZED_WORKFLOW - replaces the original ensemble method:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
# which runs all timeseries through all ALGORITHMS
final_ensemble = []
number_of_algorithms_triggered = 0
number_of_algorithms_run = 0
number_of_algorithms = len(ALGORITHMS)
maximum_false_count = number_of_algorithms - CONSENSUS + 1
# logger.info('the maximum_false_count is %s, above which CONSENSUS cannot be achieved' % (str(maximum_false_count)))
consensus_possible = True
time_all_algorithms = False
algorithm_tmp_file_prefix = '%s/%s.' % (SKYLINE_TMP_DIR, skyline_app)
# @added 20200607 - Feature #3566: custom_algorithms
algorithms_run = []
custom_consensus_override = False
custom_consensus_values = []
run_3sigma_algorithms = True
run_3sigma_algorithms_overridden_by = []
custom_algorithm = None
# @modified 20200817 - Bug #3652: Handle multiple metrics in base_name conversion
# base_name = metric_name.replace(FULL_NAMESPACE, '', 1)
if metric_name.startswith(FULL_NAMESPACE):
base_name = metric_name.replace(FULL_NAMESPACE, '', 1)
else:
base_name = metric_name
if CUSTOM_ALGORITHMS:
custom_algorithms_to_run = {}
try:
custom_algorithms_to_run = get_custom_algorithms_to_run(
skyline_app, base_name, CUSTOM_ALGORITHMS,
DEBUG_CUSTOM_ALGORITHMS)
if DEBUG_CUSTOM_ALGORITHMS:
if custom_algorithms_to_run:
logger.debug(
'algorithms :: debug :: custom algorithms ARE RUN on %s'
% (str(base_name)))
except:
logger.error('error :: get_custom_algorithms_to_run :: %s' %
traceback.format_exc())
custom_algorithms_to_run = {}
for custom_algorithm in custom_algorithms_to_run:
if consensus_possible:
algorithm = custom_algorithm
debug_logging = False
try:
debug_logging = custom_algorithms_to_run[custom_algorithm][
'debug_logging']
except:
debug_logging = False
if DEBUG_CUSTOM_ALGORITHMS:
debug_logging = True
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms += 1
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.debug(
'debug :: algorithms :: running custom algorithm %s on %s'
% (str(algorithm), str(base_name)))
start_debug_timer = timer()
run_custom_algorithm_on_timeseries = None
try:
from custom_algorithms import run_custom_algorithm_on_timeseries
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.debug(
'debug :: algorithms :: loaded run_custom_algorithm_on_timeseries'
)
except:
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.error(traceback.format_exc())
logger.error(
'error :: algorithms :: failed to load run_custom_algorithm_on_timeseries'
)
result = None
anomalyScore = None
if run_custom_algorithm_on_timeseries:
try:
result, anomalyScore = run_custom_algorithm_on_timeseries(
skyline_app, getpid(), base_name, timeseries,
custom_algorithm,
custom_algorithms_to_run[custom_algorithm],
DEBUG_CUSTOM_ALGORITHMS)
algorithm_result = [result]
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.debug(
'debug :: algorithms :: run_custom_algorithm_on_timeseries run with result - %s, anomalyScore - %s'
% (str(result), str(anomalyScore)))
except:
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.error(traceback.format_exc())
logger.error(
'error :: algorithms :: failed to run custom_algorithm %s on %s'
% (custom_algorithm, base_name))
result = None
algorithm_result = [None]
else:
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.error(
'error :: debug :: algorithms :: run_custom_algorithm_on_timeseries was not loaded so was not run'
)
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
end_debug_timer = timer()
logger.debug(
'debug :: algorithms :: ran custom algorithm %s on %s with result of (%s, %s) in %.6f seconds'
% (str(algorithm), str(base_name), str(result),
str(anomalyScore),
(end_debug_timer - start_debug_timer)))
algorithms_run.append(algorithm)
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [None]
algorithms_run.append(algorithm)
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
custom_consensus = None
algorithms_allowed_in_consensus = []
# @added 20200605 - Feature #3566: custom_algorithms
# Allow only single or multiple custom algorithms to run and allow
# the a custom algorithm to specify not to run 3sigma aglorithms
custom_run_3sigma_algorithms = True
try:
custom_run_3sigma_algorithms = custom_algorithms_to_run[
custom_algorithm]['run_3sigma_algorithms']
except:
custom_run_3sigma_algorithms = True
if not custom_run_3sigma_algorithms and result:
run_3sigma_algorithms = False
run_3sigma_algorithms_overridden_by.append(custom_algorithm)
if DEBUG_CUSTOM_ALGORITHMS or debug_logging:
logger.debug(
'debug :: algorithms :: run_3sigma_algorithms is False on %s for %s'
% (custom_algorithm, base_name))
if result:
try:
custom_consensus = custom_algorithms_to_run[
custom_algorithm]['consensus']
if custom_consensus == 0:
custom_consensus = int(CONSENSUS)
else:
custom_consensus_values.append(custom_consensus)
except:
custom_consensus = int(CONSENSUS)
try:
algorithms_allowed_in_consensus = custom_algorithms_to_run[
custom_algorithm]['algorithms_allowed_in_consensus']
except:
algorithms_allowed_in_consensus = []
if custom_consensus == 1:
consensus_possible = False
custom_consensus_override = True
logger.info(
'algorithms :: overidding the CONSENSUS as custom algorithm %s overides on %s'
% (str(algorithm), str(base_name)))
# TODO - figure out how to handle consensus overrides if
# multiple custom algorithms are used
if DEBUG_CUSTOM_ALGORITHMS:
if not run_3sigma_algorithms:
logger.debug('algorithms :: not running 3 sigma algorithms')
if len(run_3sigma_algorithms_overridden_by) > 0:
logger.debug(
'algorithms :: run_3sigma_algorithms overridden by %s' %
(str(run_3sigma_algorithms_overridden_by)))
# @added 20200425 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
negatives_found = False
# @added 20200817 - Feature #3684: ROOMBA_BATCH_METRICS_CUSTOM_DURATIONS
# Feature #3650: ROOMBA_DO_NOT_PROCESS_BATCH_METRICS
# Feature #3480: batch_processing
# Feature #3678: SNAB - anomalyScore
# Allow for custom durations on namespaces
use_full_duration = int(FULL_DURATION) + 0
if ROOMBA_BATCH_METRICS_CUSTOM_DURATIONS:
for metric_namespace, custom_full_duration in ROOMBA_BATCH_METRICS_CUSTOM_DURATIONS:
if metric_namespace in base_name:
use_full_duration = custom_full_duration
detect_drop_off_cliff_trigger = False
for algorithm in ALGORITHMS:
# @modified 20200607 - Feature #3566: custom_algorithms
# Added run_3sigma_algorithms to allow only single or multiple custom
# algorithms to run and allow the a custom algorithm to specify not to
# run 3sigma aglorithms.
# if consensus_possible:
if consensus_possible and run_3sigma_algorithms:
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
try:
# @added 20200817 - Feature #3684: ROOMBA_BATCH_METRICS_CUSTOM_DURATIONS
# Feature #3650: ROOMBA_DO_NOT_PROCESS_BATCH_METRICS
# Feature #3480: batch_processing
# Feature #3678: SNAB - anomalyScore
# Allow for custom durations on namespaces
# algorithm_result = [globals()[test_algorithm](timeseries) for test_algorithm in run_algorithm]
algorithm_result = [
globals()[test_algorithm](timeseries, use_full_duration)
for test_algorithm in run_algorithm
]
except:
# logger.error('%s failed' % (algorithm))
algorithm_result = [None]
# @added 20200607 - Feature #3566: custom_algorithms
algorithms_run.append(algorithm)
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [None]
algorithms_run.append(algorithm)
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
# logger.info('algorithm %s triggerred' % (str(algorithm)))
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
if not RUN_OPTIMIZED_WORKFLOW:
continue
if time_all_algorithms:
continue
if ENABLE_ALL_ALGORITHMS_RUN_METRICS:
continue
# true_count = final_ensemble.count(True)
# false_count = final_ensemble.count(False)
# logger.info('current false_count %s' % (str(false_count)))
if final_ensemble.count(False) >= maximum_false_count:
consensus_possible = False
# logger.info('CONSENSUS cannot be reached as %s algorithms have already not been triggered' % (str(false_count)))
# skip_algorithms_count = number_of_algorithms - number_of_algorithms_run
# logger.info('skipping %s algorithms' % (str(skip_algorithms_count)))
# logger.info('final_ensemble: %s' % (str(final_ensemble)))
try:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
ensemble = final_ensemble
# @modified 20200607 - Feature #3566: custom_algorithms
# threshold = len(ensemble) - CONSENSUS
if custom_consensus_override:
threshold = len(ensemble) - 1
else:
threshold = len(ensemble) - CONSENSUS
if ensemble.count(False) <= threshold:
# @added 20200425 - Feature #3508: ionosphere.untrainable_metrics
# Only run a negatives_present check if it is anomalous, there
# is no need to check unless it is related to an anomaly
if run_negatives_present:
try:
# @added 20200817 - Feature #3684: ROOMBA_BATCH_METRICS_CUSTOM_DURATIONS
# Feature #3650: ROOMBA_DO_NOT_PROCESS_BATCH_METRICS
# Feature #3480: batch_processing
# Feature #3678: SNAB - anomalyScore
# Allow for custom durations on namespaces
# negatives_found = negatives_present(timeseries)
negatives_found = negatives_present(
timeseries, use_full_duration)
except:
logger.error('Algorithm error: negatives_present :: %s' %
traceback.format_exc())
negatives_found = False
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return True, ensemble, timeseries[-1][1]
# @modified 20200607 - Feature #3566: custom_algorithms
# Added algorithms_run
# return True, ensemble, timeseries[-1][1], negatives_found
# @modified 20200815 - Feature #3678: SNAB - anomalyScore
# Added the number_of_algorithms to calculate anomalyScore from
# return True, ensemble, timeseries[-1][1], negatives_found, algorithms_run
return True, ensemble, timeseries[-1][
1], negatives_found, algorithms_run, number_of_algorithms
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return False, ensemble, timeseries[-1][1]
# @modified 20200607 - Feature #3566: custom_algorithms
# Added algorithms_run
# @modified 20200815 - Feature #3678: SNAB - anomalyScore
# Added the number_of_algorithms to calculate anomalyScore from
# return False, ensemble, timeseries[-1][1], negatives_found, algorithms_run
return False, ensemble, timeseries[-1][
1], negatives_found, algorithms_run, number_of_algorithms
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return False, [], 1
# @modified 20200607 - Feature #3566: custom_algorithms
# Added algorithms_run
# return False, ensemble, timeseries[-1][1], negatives_found, algorithms_run
# @modified 20200815 - Feature #3678: SNAB - anomalyScore
# Added the number_of_algorithms to calculate anomalyScore from
# return False, [], 1, negatives_found, algorithms_run
return False, [], 1, negatives_found, algorithms_run, 0
def run_selected_batch_algorithm(timeseries, metric_name,
run_negatives_present):
"""
Filter timeseries and run selected algorithm.
"""
try:
from settings import BATCH_PROCESSING_STALE_PERIOD
STALE_PERIOD = BATCH_PROCESSING_STALE_PERIOD
except:
STALE_PERIOD = 86400
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
raise Boring()
# RUN_OPTIMIZED_WORKFLOW - replaces the original ensemble method:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
# which runs all timeseries through all ALGORITHMS
final_ensemble = []
number_of_algorithms_triggered = 0
number_of_algorithms_run = 0
number_of_algorithms = len(ALGORITHMS)
maximum_false_count = number_of_algorithms - CONSENSUS + 1
# logger.info('the maximum_false_count is %s, above which CONSENSUS cannot be achieved' % (str(maximum_false_count)))
consensus_possible = True
time_all_algorithms = False
algorithm_tmp_file_prefix = '%s/%s.' % (SKYLINE_TMP_DIR, skyline_app)
# @added 20200425 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
negatives_found = False
for algorithm in ALGORITHMS:
if consensus_possible:
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
try:
algorithm_result = [
globals()[test_algorithm](timeseries)
for test_algorithm in run_algorithm
]
except:
# logger.error('%s failed' % (algorithm))
algorithm_result = [None]
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [False]
# logger.info('CONSENSUS NOT ACHIEVABLE - skipping %s' % (str(algorithm)))
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
# logger.info('algorithm %s triggerred' % (str(algorithm)))
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
if not RUN_OPTIMIZED_WORKFLOW:
continue
if time_all_algorithms:
continue
if ENABLE_ALL_ALGORITHMS_RUN_METRICS:
continue
# true_count = final_ensemble.count(True)
# false_count = final_ensemble.count(False)
# logger.info('current false_count %s' % (str(false_count)))
if final_ensemble.count(False) >= maximum_false_count:
consensus_possible = False
# logger.info('CONSENSUS cannot be reached as %s algorithms have already not been triggered' % (str(false_count)))
# skip_algorithms_count = number_of_algorithms - number_of_algorithms_run
# logger.info('skipping %s algorithms' % (str(skip_algorithms_count)))
# logger.info('final_ensemble: %s' % (str(final_ensemble)))
try:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
ensemble = final_ensemble
threshold = len(ensemble) - CONSENSUS
if ensemble.count(False) <= threshold:
# @added 20200425 - Feature #3508: ionosphere.untrainable_metrics
# Only run a negatives_present check if it is anomalous, there
# is no need to check unless it is related to an anomaly
if run_negatives_present:
try:
negatives_found = negatives_present(timeseries)
except:
logger.error('Algorithm error: negatives_present :: %s' %
traceback.format_exc())
negatives_found = False
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return True, ensemble, timeseries[-1][1]
return True, ensemble, timeseries[-1][1], negatives_found
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return False, ensemble, timeseries[-1][1]
return False, ensemble, timeseries[-1][1], negatives_found
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
# @modified 20200425 - Feature #3508: ionosphere.untrainable_metrics
# return False, [], 1
return False, [], 1, negatives_found
def run_selected_algorithm(timeseries, metric_name):
"""
Filter timeseries and run selected algorithm.
"""
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
raise Boring()
# RUN_OPTIMIZED_WORKFLOW - replaces the original ensemble method:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
# which runs all timeseries through all ALGORITHMS
final_ensemble = []
number_of_algorithms_triggered = 0
number_of_algorithms_run = 0
number_of_algorithms = len(ALGORITHMS)
maximum_false_count = number_of_algorithms - CONSENSUS + 1
# logger.info('the maximum_false_count is %s, above which CONSENSUS cannot be achieved' % (str(maximum_false_count)))
consensus_possible = True
# DEVELOPMENT: this is for a development version of analyzer only
if skyline_app == 'analyzer_dev':
time_all_algorithms = True
else:
time_all_algorithms = False
algorithm_tmp_file_prefix = '%s/%s.' % (SKYLINE_TMP_DIR, skyline_app)
for algorithm in ALGORITHMS:
if consensus_possible:
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
try:
algorithm_result = [
globals()[test_algorithm](timeseries)
for test_algorithm in run_algorithm
]
except:
# logger.error('%s failed' % (algorithm))
algorithm_result = [None]
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [False]
# logger.info('CONSENSUS NOT ACHIEVABLE - skipping %s' % (str(algorithm)))
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
# logger.info('algorithm %s triggerred' % (str(algorithm)))
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
if not RUN_OPTIMIZED_WORKFLOW:
continue
if time_all_algorithms:
continue
if ENABLE_ALL_ALGORITHMS_RUN_METRICS:
continue
# true_count = final_ensemble.count(True)
# false_count = final_ensemble.count(False)
# logger.info('current false_count %s' % (str(false_count)))
if final_ensemble.count(False) >= maximum_false_count:
consensus_possible = False
# logger.info('CONSENSUS cannot be reached as %s algorithms have already not been triggered' % (str(false_count)))
# skip_algorithms_count = number_of_algorithms - number_of_algorithms_run
# logger.info('skipping %s algorithms' % (str(skip_algorithms_count)))
# logger.info('final_ensemble: %s' % (str(final_ensemble)))
try:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
ensemble = final_ensemble
threshold = len(ensemble) - CONSENSUS
if ensemble.count(False) <= threshold:
if ENABLE_SECOND_ORDER:
if is_anomalously_anomalous(metric_name, ensemble,
timeseries[-1][1]):
return True, ensemble, timeseries[-1][1]
else:
return True, ensemble, timeseries[-1][1]
return False, ensemble, timeseries[-1][1]
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
return False, [], 1
def run_selected_algorithm(timeseries, metric_name, airgapped_metrics,
airgapped_metrics_filled, run_negatives_present,
check_for_airgaps_only):
"""
Filter timeseries and run selected algorithm.
"""
# @added 20180807 - Feature #2492: alert on stale metrics
# Determine if a metric has stopped sending data and if so add to the
# analyzer.alert_on_stale_metrics Redis set
add_to_alert_on_stale_metrics = False
if ALERT_ON_STALE_METRICS:
# @modified 20180816 - Feature #2492: alert on stale metrics
# Added try and except to prevent some errors that are encounter between
# 00:14 and 00:17 on some days
# Traceback (most recent call last):
# File "/opt/skyline/github/skyline/skyline/analyzer/analyzer.py", line 394, in spin_process
# anomalous, ensemble, datapoint = run_selected_algorithm(timeseries, metric_name)
# File "/opt/skyline/github/skyline/skyline/analyzer/algorithms.py", line 530, in run_selected_algorithm
# if int(time()) - int(timeseries[-1][0]) >= ALERT_ON_STALE_PERIOD:
# IndexError: list index out of range
try:
if int(time()) - int(timeseries[-1][0]) >= ALERT_ON_STALE_PERIOD:
add_to_alert_on_stale_metrics = True
except:
# @modified 20180816 -
# Feature #2492: alert on stale metrics
add_to_alert_on_stale_metrics = False
try:
if int(time()) - int(timeseries[-1][0]) >= STALE_PERIOD:
add_to_alert_on_stale_metrics = False
except:
add_to_alert_on_stale_metrics = False
if add_to_alert_on_stale_metrics:
try:
# @added 20200505 - Feature #3504: Handle airgaps in batch metrics
# Use get_redis_conn
from skyline_functions import get_redis_conn
redis_conn = get_redis_conn(skyline_app)
redis_conn.sadd('analyzer.alert_on_stale_metrics', metric_name)
except:
pass
# @added 20200505 - Feature #3504: Handle airgaps in batch metrics
# Check to see if this is a batch processing metric that has been sent
# through Analyzer to check for airgaps only and if so do not check the
# timeseries for exceptions
check_for_timeseries_exceptions = True
check_airgap_only = None
if BATCH_PROCESSING and check_for_airgaps_only:
check_airgap_only_key = 'analyzer.check_airgap_only.%s' % metric_name
try:
if not add_to_alert_on_stale_metrics:
# @added 20200505 - Feature #3504: Handle airgaps in batch metrics
# Use get_redis_conn
from skyline_functions import get_redis_conn
redis_conn = get_redis_conn(skyline_app)
check_airgap_only = redis_conn.get(check_airgap_only_key)
except:
check_airgap_only = None
if check_airgap_only:
check_for_timeseries_exceptions = False
# @modified 20200505 - Feature #3504: Handle airgaps in batch metrics
# Wrapped in check_for_timeseries_exceptions as if it is a check_airgap_only
# metric then the time series should not be checked for exceptions
if check_for_timeseries_exceptions:
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
raise Boring()
# @added 20200423 - Feature #3508: ionosphere.untrainable_metrics
# Added run_negatives_present
negatives_found = False
# @added 20200117 - Feature #3400: Identify air gaps in the metric data
# @modified 20200214 - Bug #3448: Repeated airgapped_metrics
# Feature #3400: Identify air gaps in the metric data
# if IDENTIFY_AIRGAPS:
if IDENTIFY_AIRGAPS or IDENTIFY_UNORDERED_TIMESERIES:
# airgaps = identify_airgaps(metric_name, timeseries, airgapped_metrics)
# if airgaps:
process_metric = True
if IDENTIFY_AIRGAPS:
if CHECK_AIRGAPS:
process_metric = False
# @added 20200423 - Feature #3504: Handle airgaps in batch metrics
# Feature #3400: Identify air gaps in the metric data
# Replaced code block below to determine if a metric is a check
# with a skyline_functions definition of that block as
# the check_metric_for_airgaps function
check_metric_for_airgaps = False
try:
check_metric_for_airgaps = is_check_airgap_metric(
metric_name)
except:
check_metric_for_airgaps = False
try:
logger.error(
'failed to determine if %s is an airgap metric: %s'
% (str(metric_name), traceback.format_exc()))
except:
logger.error(
'failed to determine if the metric is an airgap metric'
)
if check_metric_for_airgaps:
process_metric = True
else:
# If IDENTIFY_AIRGAPS is not enabled and
# IDENTIFY_UNORDERED_TIMESERIES is enabled process the metric
if IDENTIFY_UNORDERED_TIMESERIES:
process_metric = True
airgaps = None
unordered_timeseries = False
if process_metric:
# @modified 20200501 - Feature #3400: Identify air gaps in the metric data
# Added airgapped_metrics_filled
# airgaps, unordered_timeseries = identify_airgaps(metric_name, timeseries, airgapped_metrics)
airgaps, unordered_timeseries = identify_airgaps(
metric_name, timeseries, airgapped_metrics,
airgapped_metrics_filled)
if airgaps or unordered_timeseries:
try:
redis_conn.ping()
except:
# @added 20200505 - Feature #3504: Handle airgaps in batch metrics
# Use get_redis_conn
from skyline_functions import get_redis_conn
redis_conn = get_redis_conn(skyline_app)
if airgaps:
for i in airgaps:
try:
redis_conn.sadd('analyzer.airgapped_metrics', str(i))
logger.info('adding airgap %s' % str(i))
# TODO: learn_airgapped_metrics
except:
pass
del airgaps
# @added 20200214 - Bug #3448: Repeated airgapped_metrics
# Feature #3400: Identify air gaps in the metric data
# Also add unordered time series to the analyzer.unordered_timeseries
# Redis set
if unordered_timeseries:
try:
redis_conn.sadd('analyzer.unordered_timeseries', metric_name)
del unorder_timeseries
except:
pass
# @added 20200423 - Feature #3504: Handle airgaps in batch metrics
# Feature #3480: batch_processing
# Feature #3486: analyzer_batch
# Feature #3400: Identify air gaps in the metric data
# Check to see if this is a batch processing metric that has been sent to
# analyzer_batch for processing but sent through Analyzer to check for
# airgaps only and if so return as it should not be run through algorithms
if BATCH_PROCESSING:
if check_airgap_only:
try:
redis_conn.delete(check_airgap_only_key)
except:
try:
logger.error(
'failed to delete Redis key %s: %s' %
(str(check_airgap_only_key), traceback.format_exc()))
except:
logger.error(
'failed to failure regarding deleting the check_airgap_only_key Redis key'
)
# @modified 20200430 - Feature #3480: batch_processing
# Tidy up and reduce logging, only log if debug enabled
if BATCH_PROCESSING_DEBUG:
logger.info(
'algorithms :: batch processing - batch metric %s checked for airgaps only, not analysing'
% (str(metric_name)))
# TODO: the only worry here is that this metric then gets added to
# the not_anomalous Redis set? Not sure if that is a problem, I do
# not think it is. Unless it is in the end of anomaly_end_timestamp
# context?
# @modified 20200424 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
return False, [], 1, negatives_found
# RUN_OPTIMIZED_WORKFLOW - replaces the original ensemble method:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
# which runs all timeseries through all ALGORITHMS
final_ensemble = []
number_of_algorithms_triggered = 0
number_of_algorithms_run = 0
number_of_algorithms = len(ALGORITHMS)
maximum_false_count = number_of_algorithms - CONSENSUS + 1
# logger.info('the maximum_false_count is %s, above which CONSENSUS cannot be achieved' % (str(maximum_false_count)))
consensus_possible = True
# DEVELOPMENT: this is for a development version of analyzer only
if skyline_app == 'analyzer_dev':
time_all_algorithms = True
else:
time_all_algorithms = False
algorithm_tmp_file_prefix = '%s/%s.' % (SKYLINE_TMP_DIR, skyline_app)
for algorithm in ALGORITHMS:
if consensus_possible:
if send_algorithm_run_metrics:
algorithm_count_file = '%s%s.count' % (
algorithm_tmp_file_prefix, algorithm)
algorithm_timings_file = '%s%s.timings' % (
algorithm_tmp_file_prefix, algorithm)
run_algorithm = []
run_algorithm.append(algorithm)
number_of_algorithms_run += 1
if send_algorithm_run_metrics:
start = timer()
try:
algorithm_result = [
globals()[test_algorithm](timeseries)
for test_algorithm in run_algorithm
]
except:
# logger.error('%s failed' % (algorithm))
algorithm_result = [None]
if send_algorithm_run_metrics:
end = timer()
with open(algorithm_count_file, 'a') as f:
f.write('1\n')
with open(algorithm_timings_file, 'a') as f:
f.write('%.6f\n' % (end - start))
else:
algorithm_result = [False]
# logger.info('CONSENSUS NOT ACHIEVABLE - skipping %s' % (str(algorithm)))
if algorithm_result.count(True) == 1:
result = True
number_of_algorithms_triggered += 1
# logger.info('algorithm %s triggerred' % (str(algorithm)))
elif algorithm_result.count(False) == 1:
result = False
elif algorithm_result.count(None) == 1:
result = None
else:
result = False
final_ensemble.append(result)
if not RUN_OPTIMIZED_WORKFLOW:
continue
if time_all_algorithms:
continue
if ENABLE_ALL_ALGORITHMS_RUN_METRICS:
continue
# true_count = final_ensemble.count(True)
# false_count = final_ensemble.count(False)
# logger.info('current false_count %s' % (str(false_count)))
if final_ensemble.count(False) >= maximum_false_count:
consensus_possible = False
# logger.info('CONSENSUS cannot be reached as %s algorithms have already not been triggered' % (str(false_count)))
# skip_algorithms_count = number_of_algorithms - number_of_algorithms_run
# logger.info('skipping %s algorithms' % (str(skip_algorithms_count)))
# logger.info('final_ensemble: %s' % (str(final_ensemble)))
try:
# ensemble = [globals()[algorithm](timeseries) for algorithm in ALGORITHMS]
ensemble = final_ensemble
threshold = len(ensemble) - CONSENSUS
if ensemble.count(False) <= threshold:
# @added 20200425 - Feature #3508: ionosphere.untrainable_metrics
# Only run a negatives_present check if it is anomalous, there
# is no need to check unless it is related to an anomaly
if run_negatives_present:
try:
negatives_found = negatives_present(timeseries)
except:
logger.error('Algorithm error: negatives_present :: %s' %
traceback.format_exc())
negatives_found = False
if ENABLE_SECOND_ORDER:
if is_anomalously_anomalous(metric_name, ensemble,
timeseries[-1][1]):
# @modified 20200423 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
return True, ensemble, timeseries[-1][1], negatives_found
else:
return True, ensemble, timeseries[-1][1], negatives_found
# @modified 20200423 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
return False, ensemble, timeseries[-1][1], negatives_found
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
# @modified 20200423 - Feature #3508: ionosphere.untrainable_metrics
# Added negatives_found
return False, [], 1, negatives_found
def run_selected_algorithm(timeseries, metric_name, metric_expiration_time,
metric_min_average, metric_min_average_seconds,
metric_trigger, alert_threshold, metric_alerters,
autoaggregate, autoaggregate_value, algorithm):
"""
Filter timeseries and run selected algorithm.
"""
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: assigning in algoritms.py - %s, %s' %
(metric_name, algorithm))
# Get rid of short series
if len(timeseries) < MIN_TOLERABLE_LENGTH:
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: TooShort - %s, %s' %
(metric_name, algorithm))
raise TooShort()
# Get rid of stale series
if time() - timeseries[-1][0] > STALE_PERIOD:
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: Stale - %s, %s' % (metric_name, algorithm))
raise Stale()
# Get rid of boring series
if len(set(item[1] for item in
timeseries[-MAX_TOLERABLE_BOREDOM:])) == BOREDOM_SET_SIZE:
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: Boring - %s, %s' % (metric_name, algorithm))
raise Boring()
if autoaggregate:
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: auto aggregating %s for %s' %
(metric_name, algorithm))
try:
agg_timeseries = autoaggregate_ts(timeseries, autoaggregate_value)
if ENABLE_BOUNDARY_DEBUG:
logger.info(
'debug :: aggregated_timeseries returned %s for %s' %
(metric_name, algorithm))
except Exception as e:
agg_timeseries = []
if ENABLE_BOUNDARY_DEBUG:
logger.info(
'debug error - autoaggregate excpection %s for %s' %
(metric_name, algorithm))
logger.error('Algorithm error: %s' % traceback.format_exc())
logger.error('error: %e' % e)
if len(agg_timeseries) > 10:
timeseries = agg_timeseries
else:
if ENABLE_BOUNDARY_DEBUG:
logger.info('debug :: TooShort - %s, %s' %
(metric_name, algorithm))
raise TooShort()
if len(timeseries) < 10:
if ENABLE_BOUNDARY_DEBUG:
logger.info(
'debug :: timeseries too short - %s - timeseries length - %s' %
(metric_name, str(len(timeseries))))
raise TooShort()
try:
ensemble = [
globals()[algorithm](timeseries, metric_name,
metric_expiration_time, metric_min_average,
metric_min_average_seconds, metric_trigger)
]
if ensemble.count(True) == 1:
if ENABLE_BOUNDARY_DEBUG:
logger.info(
'debug :: anomalous datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s'
% (str(timeseries[-1][1]), str(metric_name),
str(metric_expiration_time), str(metric_min_average),
str(metric_min_average_seconds), str(metric_trigger),
str(alert_threshold), str(metric_alerters),
str(algorithm)))
return True, ensemble, timeseries[-1][
1], metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm
else:
if ENABLE_BOUNDARY_DEBUG:
logger.info(
'debug :: not anomalous datapoint = %s - %s, %s, %s, %s, %s, %s, %s, %s'
% (str(timeseries[-1][1]), str(metric_name),
str(metric_expiration_time), str(metric_min_average),
str(metric_min_average_seconds), str(metric_trigger),
str(alert_threshold), str(metric_alerters),
str(algorithm)))
return False, ensemble, timeseries[-1][
1], metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm
except:
logger.error('Algorithm error: %s' % traceback.format_exc())
return False, [], 1, metric_name, metric_expiration_time, metric_min_average, metric_min_average_seconds, metric_trigger, alert_threshold, metric_alerters, algorithm