def process_frontends(self, data_frame):
"""Process statistics for frontends.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
"""
# Filtering for Pandas
cnt_metrics = 1
log.debug('processing statistics for frontends')
is_frontend = data_frame['svname_'] == 'FRONTEND'
excluded_frontends = []
metrics = self.config.get('process', 'frontend-metrics', fallback=None)
if metrics is not None:
metrics = metrics.split(' ')
else:
metrics = FRONTEND_METRICS
log.debug('metric names for frontends %s', metrics)
exclude_frontends_file = self.config.get('process',
'exclude-frontends',
fallback=None)
if exclude_frontends_file is not None:
excluded_frontends = load_file_content(exclude_frontends_file)
log.info('excluding frontends %s', excluded_frontends)
# replace dots in frontend names
excluded_frontends[:] = [x.replace('.', '_')
for x in excluded_frontends]
filter_frontend = (~data_frame['pxname_']
.isin(excluded_frontends))
frontend_stats = (data_frame[is_frontend & filter_frontend]
.loc[:, ['pxname_'] + metrics])
# Group by frontend name and sum values for each column
frontend_aggr_stats = frontend_stats.groupby(['pxname_']).sum()
cnt_metrics += frontend_aggr_stats.size
for index, row in frontend_aggr_stats.iterrows():
paths = self.get_metric_paths('frontend', index)
for i in row.iteritems():
datapoints = [
"{p}.frontend.{f}.{m} {v} {t}\n"
.format(p=path,
f=index,
m=i[0],
v=i[1],
t=self.timestamp) for path in paths
]
for datapoint in datapoints:
dispatcher.signal('send', data=datapoint)
data = ("{p}.haproxystats.MetricsFrontend {v} {t}\n"
.format(p=self.graphite_path,
v=cnt_metrics,
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of frontend metrics %s', cnt_metrics)
log.debug('finished processing statistics for frontends')
def process_frontends(self, data_frame):
"""
Process statistics for frontends.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
"""
# Filtering for Pandas
cnt_metrics = 1
log.debug('processing statistics for frontends')
is_frontend = data_frame['svname'] == 'FRONTEND'
filter_frontend = None
metrics = self.config.get('process', 'frontend-metrics', fallback=None)
if metrics is not None:
metrics = metrics.split(' ')
else:
metrics = FRONTEND_METRICS
log.debug('metric names for frontends %s', metrics)
exclude_frontends_file = self.config.get('process',
'exclude-frontends',
fallback=None)
if exclude_frontends_file is not None:
excluded_frontends = load_file_content(exclude_frontends_file)
if excluded_frontends: # in case the file is empty
log.info('excluding frontends %s', excluded_frontends)
filter_frontend = (~data_frame['pxname']
.isin(excluded_frontends))
if filter_frontend is not None:
frontend_stats = (data_frame[is_frontend & filter_frontend]
.loc[:, ['pxname'] + metrics])
else:
frontend_stats = (data_frame[is_frontend]
.loc[:, ['pxname'] + metrics])
# Group by frontend name and sum values for each column
frontend_aggr_stats = frontend_stats.groupby(['pxname']).sum()
cnt_metrics += frontend_aggr_stats.size
for index, row in frontend_aggr_stats.iterrows():
name = index.replace('.', '_')
for i in row.iteritems():
data = ("{p}.frontend.{f}.{m} {v} {t}\n"
.format(p=self.graphite_path,
f=name,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsFrontend {v} {t}\n"
.format(p=self.graphite_path,
v=cnt_metrics,
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of frontend metrics %s', cnt_metrics)
log.debug('finished processing statistics for frontends')
def process_backends(self, data_frame, *, filter_backend=None):
"""
Process statistics for backends.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
filter_backend: A filter to apply on data_frame.
"""
cnt_metrics = 1
log.debug('processing statistics for backends')
# Filtering for Pandas
is_backend = data_frame['svname'] == 'BACKEND'
metrics = self.config.get('process', 'backend-metrics', fallback=None)
if metrics is not None:
metrics = metrics.split(' ')
else:
metrics = BACKEND_METRICS
log.debug('metric names for backends %s', metrics)
# Get rows only for backends. For some metrics we need the sum and
# for others the average, thus we split them.
if filter_backend is not None:
stats_sum = (data_frame[is_backend & filter_backend]
.loc[:, ['pxname'] + metrics])
stats_avg = (data_frame[is_backend & filter_backend]
.loc[:, ['pxname'] + BACKEND_AVG_METRICS])
else:
stats_sum = data_frame[is_backend].loc[:, ['pxname'] + metrics]
stats_avg = (data_frame[is_backend]
.loc[:, ['pxname'] + BACKEND_AVG_METRICS])
aggr_sum = stats_sum.groupby(['pxname'], as_index=False).sum()
aggr_avg = stats_avg.groupby(['pxname'], as_index=False).mean()
merged_stats = pandas.merge(aggr_sum, aggr_avg, on='pxname')
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 1) # minus the index
for _, row in merged_stats.iterrows():
name = row[0].replace('.', '_')
for i in row[1:].iteritems():
data = ("{p}.backend.{b}.{m} {v} {t}\n"
.format(p=self.graphite_path,
b=name,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsBackend {v} {t}\n"
.format(p=self.graphite_path,
v=cnt_metrics,
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of backend metrics %s', cnt_metrics)
log.debug('finished processing statistics for backends')
def process_backends(self, data_frame, filter_backend):
"""Process statistics for backends.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
filter_backend: A filter to apply on data_frame.
"""
cnt_metrics = 1
log.debug('processing statistics for backends')
# Filtering for Pandas
is_backend = data_frame['svname_'] == 'BACKEND'
# For averages only consider entries with actual connections made
got_traffic = data_frame['lbtot'] > 0
metrics = self.config.get('process', 'backend-metrics', fallback=None)
if metrics is not None:
metrics = metrics.split(' ')
else:
metrics = BACKEND_METRICS
log.debug('metric names for backends %s', metrics)
# Get rows only for backends. For some metrics we need the sum and
# for others the average, thus we split them.
stats_sum = (data_frame[is_backend
& filter_backend].loc[:,
['pxname_'] + metrics])
stats_avg = (data_frame[is_backend & filter_backend
& got_traffic].loc[:, ['pxname_'] +
BACKEND_AVG_METRICS])
aggr_sum = stats_sum.groupby(['pxname_'], as_index=False).sum()
aggr_avg = stats_avg.groupby(['pxname_'], as_index=False).mean()
merged_stats = pandas.merge(aggr_sum, aggr_avg, on='pxname_')
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 1) # minus the index
for _, row in merged_stats.iterrows():
backend = row[0]
paths = self.get_metric_paths('backend', backend)
for i in row[1:].iteritems():
datapoints = [
"{p}.backend.{b}.{m} {v} {t}\n".format(p=path,
b=backend,
m=i[0],
v=i[1],
t=self.timestamp)
for path in paths
]
for datapoint in datapoints:
dispatcher.signal('send', data=datapoint)
data = ("{p}.haproxystats.MetricsBackend {v} {t}\n".format(
p=self.graphite_path, v=cnt_metrics, t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of backend metrics %s', cnt_metrics)
log.debug('finished processing statistics for backends')
def run(self):
"""Consume item from queue and process it.
It is the target function of Process class. Consumes items from
the queue, processes data which are pulled down by haproxystats-pull
program and uses Pandas to perform all computations of statistics.
It exits when it receives STOP_SIGNAL as item.
To avoid orphan processes on the system, it must be robust against
failures and try very hard recover from failures.
"""
if self.config.has_section('local-store'):
self.local_store = self.config.get('local-store', 'dir')
self.file_handler = FileHandler()
dispatcher.register('open', self.file_handler.open)
dispatcher.register('send', self.file_handler.send)
dispatcher.register('flush', self.file_handler.flush)
dispatcher.register('loop', self.file_handler.loop)
timeout = self.config.getfloat('graphite', 'timeout')
connect_timeout = self.config.getfloat('graphite',
'connect-timeout',
fallback=timeout)
write_timeout = self.config.getfloat('graphite',
'write-timeout',
fallback=timeout)
graphite = GraphiteHandler(
server=self.config.get('graphite', 'server'),
port=self.config.getint('graphite', 'port'),
connect_timeout=connect_timeout,
write_timeout=write_timeout,
retries=self.config.getint('graphite', 'retries'),
interval=self.config.getfloat('graphite', 'interval'),
delay=self.config.getfloat('graphite', 'delay'),
backoff=self.config.getfloat('graphite', 'backoff'),
queue_size=self.config.getint('graphite', 'queue-size'))
dispatcher.register('open', graphite.open)
dispatcher.register('send', graphite.send)
dispatcher.signal('open')
try:
while True:
log.info('waiting for item from the queue')
incoming_dir = self.tasks.get()
log.info('received item %s', incoming_dir)
if incoming_dir == STOP_SIGNAL:
break
start_time = time.time()
# incoming_dir => /var/lib/haproxystats/incoming/1454016646
# timestamp => 1454016646
self.timestamp = os.path.basename(incoming_dir)
# update filename for file handler.
# This *does not* error if a file handler is not registered.
dispatcher.signal('loop',
local_store=self.local_store,
timestamp=self.timestamp)
self.process_stats(incoming_dir)
# This flushes data to file
dispatcher.signal('flush')
# Remove directory as data have been successfully processed.
log.debug('removing %s', incoming_dir)
try:
shutil.rmtree(incoming_dir)
except (FileNotFoundError, PermissionError, OSError) as exc:
log.critical(
'failed to remove directory %s with:%s. '
'This should not have happened as it means '
'another worker processed data from this '
'directory or something/someone removed the '
'directory!', incoming_dir, exc)
elapsed_time = time.time() - start_time
log.info('total wall clock time in seconds %.3f', elapsed_time)
data = ("{p}.haproxystats.{m} {v} {t}\n".format(
p=self.graphite_path,
m='TotalWallClockTime',
v="{t:.3f}".format(t=elapsed_time),
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('finished with %s', incoming_dir)
except KeyboardInterrupt:
log.critical('Ctrl-C received')
return
def process_servers(self, data_frame, filter_backend):
"""Process statistics for servers.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
filter_backend: A filter to apply on data_frame.
"""
cnt_metrics = 1
# A filter for rows with stats for servers
is_server = data_frame['type'] == 2
log.debug('processing statistics for servers')
server_metrics = self.config.get('process',
'server-metrics',
fallback=None)
if server_metrics is not None:
server_metrics = server_metrics.split(' ')
else:
server_metrics = SERVER_METRICS
log.debug('metric names for servers %s', server_metrics)
# Get rows only for servers. For some metrics we need the sum and
# for others the average, thus we split them.
stats_sum = (data_frame[is_server
& filter_backend].loc[:,
['pxname_', 'svname_'] +
server_metrics])
stats_avg = (data_frame[is_server
& filter_backend].loc[:,
['pxname_', 'svname_'] +
SERVER_AVG_METRICS])
servers = (data_frame[is_server
& filter_backend].loc[:, ['pxname_', 'svname_']])
# Calculate the number of configured servers in a backend
tot_servers = (servers.groupby(['pxname_']).agg(
{'svname_': pandas.Series.nunique}))
aggr_sum = (stats_sum.groupby(['pxname_', 'svname_'],
as_index=False).sum())
aggr_avg = (stats_avg.groupby(['pxname_', 'svname_'],
as_index=False).mean())
merged_stats = pandas.merge(aggr_sum,
aggr_avg,
on=['svname_', 'pxname_'])
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 2)
for backend, row in tot_servers.iterrows():
cnt_metrics += 1
data = ("{p}.backend.{b}.{m} {v} {t}\n".format(
p=self.graphite_path,
b=backend,
m='TotalServers',
v=row[0],
t=self.timestamp))
dispatcher.signal('send', data=data)
for _, row in merged_stats.iterrows():
backend = row[0]
server = row[1]
for i in row[2:].iteritems():
data = ("{p}.backend.{b}.server.{s}.{m} {v} {t}\n".format(
p=self.graphite_path,
b=backend,
s=server,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'aggr-server-metrics'):
log.info('aggregate stats for servers across all backends')
# Produce statistics for servers across all backends
stats_sum = (data_frame[is_server].loc[:, ['svname_'] +
SERVER_METRICS])
stats_avg = (data_frame[is_server].loc[:, ['svname_'] +
SERVER_AVG_METRICS])
aggr_sum = (stats_sum.groupby(['svname_'], as_index=False).sum())
aggr_avg = (stats_avg.groupby(['svname_'], as_index=False).mean())
merged_stats = pandas.merge(aggr_sum, aggr_avg, on=['svname_'])
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 1) # minus the index
for _, row in merged_stats.iterrows():
server = row[0]
for i in row[1:].iteritems():
data = ("{p}.server.{s}.{m} {v} {t}\n".format(
p=self.graphite_path,
s=server,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsServer {v} {t}\n".format(
p=self.graphite_path, v=cnt_metrics, t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of server metrics %s', cnt_metrics)
log.debug('finished processing statistics for servers')
def haproxy_stats(self, files):
"""Process statistics for HAProxy daemon.
Arguments:
files (list): A list of files which contain the output of 'show
info' command on the stats socket.
"""
cnt_metrics = 1 # a metric counter
log.info('processing statistics for HAProxy daemon')
log.debug('processing files %s', ' '.join(files))
raw_info_stats = defaultdict(list)
# Parse raw data and build a data structure, input looks like:
# Name: HAProxy
# Version: 1.6.3-4d747c-52
# Release_date: 2016/02/25
# Nbproc: 4
# Uptime_sec: 59277
# SslFrontendSessionReuse_pct: 0
# ....
with fileinput.input(files=files) as file_input:
for line in file_input:
if ': ' in line:
key, value = line.split(': ', 1)
try:
numeric_value = int(value)
except ValueError:
pass
else:
raw_info_stats[key].append(numeric_value)
if not raw_info_stats:
log.error('failed to parse daemon statistics')
return
else:
# Here is where Pandas enters and starts its magic.
try:
dataframe = pandas.DataFrame(raw_info_stats)
except ValueError as exc:
log.error(
'failed to create Pandas object for daemon '
'statistics %s', exc)
return
sums = dataframe.loc[:, DAEMON_METRICS].sum()
avgs = dataframe.loc[:, DAEMON_AVG_METRICS].mean()
cnt_metrics += sums.size + avgs.size
# Pandas did all the hard work, let's join above tables and extract
# statistics
for values in pandas.concat([sums, avgs], axis=0).items():
data = ("{p}.daemon.{m} {v} {t}\n".format(p=self.graphite_path,
m=values[0].replace(
'.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
dataframe['CpuUsagePct'] = (
dataframe.loc[:, 'Idle_pct'].map(lambda x: (x * -1) + 100))
if dataframe.loc[:, 'Idle_pct'].size > 1:
log.info('calculating percentiles for CpuUsagePct')
percentiles = (dataframe.loc[:, 'CpuUsagePct'].quantile(
q=[0.25, 0.50, 0.75, 0.95, 0.99], interpolation='nearest'))
for per in percentiles.items():
# per[0] = index => [0.25, 0.50, 0.75, 0.95, 0.99]
# per[1] = percentile value
cnt_metrics += 1
data = ("{p}.daemon.{m} {v} {t}\n".format(
p=self.graphite_path,
m=("{:.2f}PercentileCpuUsagePct".format(
per[0]).split('.')[1]),
v=per[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
cnt_metrics += 1
data = ("{p}.daemon.{m} {v} {t}\n".format(
p=self.graphite_path,
m="StdCpuUsagePct",
v=dataframe.loc[:, 'CpuUsagePct'].std(),
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'calculate-percentages'):
for metric in daemon_percentage_metrics():
cnt_metrics += 1
log.info('calculating percentage for %s', metric.name)
value = calculate_percentage_per_column(dataframe, metric)
data = ("{p}.daemon.{m} {v} {t}\n".format(
p=self.graphite_path,
m=metric.title,
v=value,
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'per-process-metrics'):
log.info("processing statistics per daemon")
indexed_by_worker = dataframe.set_index('Process_num')
metrics_per_worker = (
indexed_by_worker.loc[:, DAEMON_METRICS + ['CpuUsagePct'] +
DAEMON_AVG_METRICS])
cnt_metrics += metrics_per_worker.size
for worker, row in metrics_per_worker.iterrows():
for values in row.iteritems():
data = ("{p}.daemon.process.{w}.{m} {v} {t}\n".format(
p=self.graphite_path,
w=worker,
m=values[0].replace('.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'calculate-percentages'):
for metric in daemon_percentage_metrics():
log.info('calculating percentage for %s per daemon',
metric.name)
_percentages = (metrics_per_worker.
loc[:,
[metric.limit, metric.name]].apply(
calculate_percentage_per_row,
axis=1,
args=(metric, )))
cnt_metrics += _percentages.size
for worker, row in _percentages.iterrows():
for values in row.iteritems():
data = ("{p}.daemon.process.{w}.{m} {v} {t}\n".
format(p=self.graphite_path,
w=worker,
m=values[0].replace('.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsHAProxy {v} {t}\n".format(
p=self.graphite_path, v=cnt_metrics, t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of HAProxy metrics %s', cnt_metrics)
log.info('finished processing statistics for HAProxy daemon')
def run(self):
"""Consume item from queue and process it.
It is the target function of Process class. Consumes items from
the queue, processes data which are pulled down by haproxystats-pull
program and uses Pandas to perform all computations of statistics.
It exits when it receives STOP_SIGNAL as item.
To avoid orphan processes on the system, it must be robust against
failures and try very hard recover from failures.
"""
if self.config.has_section('local-store'):
self.local_store = self.config.get('local-store', 'dir')
self.file_handler = FileHandler()
dispatcher.register('open', self.file_handler.open)
dispatcher.register('send', self.file_handler.send)
dispatcher.register('flush', self.file_handler.flush)
dispatcher.register('loop', self.file_handler.loop)
timeout = self.config.getfloat('graphite', 'timeout')
connect_timeout = self.config.getfloat('graphite',
'connect-timeout',
fallback=timeout)
write_timeout = self.config.getfloat('graphite',
'write-timeout',
fallback=timeout)
graphite = GraphiteHandler(
server=self.config.get('graphite', 'server'),
port=self.config.getint('graphite', 'port'),
connect_timeout=connect_timeout,
write_timeout=write_timeout,
retries=self.config.getint('graphite', 'retries'),
interval=self.config.getfloat('graphite', 'interval'),
delay=self.config.getfloat('graphite', 'delay'),
backoff=self.config.getfloat('graphite', 'backoff'),
queue_size=self.config.getint('graphite', 'queue-size')
)
dispatcher.register('open', graphite.open)
dispatcher.register('send', graphite.send)
dispatcher.signal('open')
try:
while True:
log.info('waiting for item from the queue')
incoming_dir = self.tasks.get()
log.info('received item %s', incoming_dir)
if incoming_dir == STOP_SIGNAL:
break
start_time = time.time()
# incoming_dir => /var/lib/haproxystats/incoming/1454016646
# timestamp => 1454016646
self.timestamp = os.path.basename(incoming_dir)
# update filename for file handler.
# This *does not* error if a file handler is not registered.
dispatcher.signal('loop',
local_store=self.local_store,
timestamp=self.timestamp)
self.process_stats(incoming_dir)
# This flushes data to file
dispatcher.signal('flush')
# Remove directory as data have been successfully processed.
log.debug('removing %s', incoming_dir)
try:
shutil.rmtree(incoming_dir)
except (FileNotFoundError, PermissionError, OSError) as exc:
log.critical('failed to remove directory %s with:%s. '
'This should not have happened as it means '
'another worker processed data from this '
'directory or something/someone removed the '
'directory!', incoming_dir, exc)
elapsed_time = time.time() - start_time
log.info('total wall clock time in seconds %.3f', elapsed_time)
data = ("{p}.haproxystats.{m} {v} {t}\n"
.format(p=self.graphite_path,
m='TotalWallClockTime',
v="{t:.3f}".format(t=elapsed_time),
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('finished with %s', incoming_dir)
except KeyboardInterrupt:
log.critical('Ctrl-C received')
return
def process_servers(self, data_frame, filter_backend):
"""Process statistics for servers.
Arguments:
data_frame (obj): A pandas data_frame ready for processing.
filter_backend: A filter to apply on data_frame.
"""
cnt_metrics = 1
# A filter for rows with stats for servers
is_server = data_frame['type'] == 2
log.debug('processing statistics for servers')
server_metrics = self.config.get('process',
'server-metrics',
fallback=None)
if server_metrics is not None:
server_metrics = server_metrics.split(' ')
else:
server_metrics = SERVER_METRICS
log.debug('metric names for servers %s', server_metrics)
# Get rows only for servers. For some metrics we need the sum and
# for others the average, thus we split them.
stats_sum = (data_frame[is_server & filter_backend]
.loc[:, ['pxname_', 'svname_'] + server_metrics])
stats_avg = (data_frame[is_server & filter_backend]
.loc[:, ['pxname_', 'svname_'] + SERVER_AVG_METRICS])
servers = (data_frame[is_server & filter_backend]
.loc[:, ['pxname_', 'svname_']])
# Calculate the number of configured servers in a backend
tot_servers = (servers
.groupby(['pxname_'])
.agg({'svname_': pandas.Series.nunique}))
aggr_sum = (stats_sum
.groupby(['pxname_', 'svname_'], as_index=False)
.sum())
aggr_avg = (stats_avg
.groupby(['pxname_', 'svname_'], as_index=False)
.mean())
merged_stats = pandas.merge(aggr_sum,
aggr_avg,
on=['svname_', 'pxname_'])
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 2)
for backend, row in tot_servers.iterrows():
cnt_metrics += 1
data = ("{p}.backend.{b}.{m} {v} {t}\n"
.format(p=self.graphite_path,
b=backend,
m='TotalServers',
v=row[0],
t=self.timestamp))
dispatcher.signal('send', data=data)
for _, row in merged_stats.iterrows():
backend = row[0]
server = row[1]
for i in row[2:].iteritems():
data = ("{p}.backend.{b}.server.{s}.{m} {v} {t}\n"
.format(p=self.graphite_path,
b=backend,
s=server,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'aggr-server-metrics'):
log.info('aggregate stats for servers across all backends')
# Produce statistics for servers across all backends
stats_sum = (data_frame[is_server]
.loc[:, ['svname_'] + SERVER_METRICS])
stats_avg = (data_frame[is_server]
.loc[:, ['svname_'] + SERVER_AVG_METRICS])
aggr_sum = (stats_sum
.groupby(['svname_'], as_index=False)
.sum())
aggr_avg = (stats_avg
.groupby(['svname_'], as_index=False)
.mean())
merged_stats = pandas.merge(aggr_sum, aggr_avg, on=['svname_'])
rows, columns = merged_stats.shape
cnt_metrics += rows * (columns - 1) # minus the index
for _, row in merged_stats.iterrows():
server = row[0]
for i in row[1:].iteritems():
data = ("{p}.server.{s}.{m} {v} {t}\n"
.format(p=self.graphite_path,
s=server,
m=i[0],
v=i[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsServer {v} {t}\n"
.format(p=self.graphite_path,
v=cnt_metrics,
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of server metrics %s', cnt_metrics)
log.debug('finished processing statistics for servers')
def haproxy_stats(self, files):
"""Process statistics for HAProxy daemon.
Arguments:
files (list): A list of files which contain the output of 'show
info' command on the stats socket.
"""
cnt_metrics = 1 # a metric counter
log.info('processing statistics for HAProxy daemon')
log.debug('processing files %s', ' '.join(files))
raw_info_stats = defaultdict(list)
# Parse raw data and build a data structure, input looks like:
# Name: HAProxy
# Version: 1.6.3-4d747c-52
# Release_date: 2016/02/25
# Nbproc: 4
# Uptime_sec: 59277
# SslFrontendSessionReuse_pct: 0
# ....
with fileinput.input(files=files) as file_input:
for line in file_input:
if ': ' in line:
key, value = line.split(': ', 1)
try:
numeric_value = int(value)
except ValueError:
pass
else:
raw_info_stats[key].append(numeric_value)
if not raw_info_stats:
log.error('failed to parse daemon statistics')
return
else:
# Here is where Pandas enters and starts its magic.
try:
dataframe = pandas.DataFrame(raw_info_stats)
except ValueError as exc:
log.error('failed to create Pandas object for daemon '
'statistics %s', exc)
return
sums = dataframe.loc[:, DAEMON_METRICS].sum()
avgs = dataframe.loc[:, DAEMON_AVG_METRICS].mean()
cnt_metrics += sums.size + avgs.size
# Pandas did all the hard work, let's join above tables and extract
# statistics
for values in pandas.concat([sums, avgs], axis=0).items():
data = ("{p}.daemon.{m} {v} {t}\n"
.format(p=self.graphite_path,
m=values[0].replace('.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
dataframe['CpuUsagePct'] = (dataframe.loc[:, 'Idle_pct']
.map(lambda x: (x * -1) + 100))
if dataframe.loc[:, 'Idle_pct'].size > 1:
log.info('calculating percentiles for CpuUsagePct')
percentiles = (dataframe.loc[:, 'CpuUsagePct']
.quantile(q=[0.25, 0.50, 0.75, 0.95, 0.99],
interpolation='nearest'))
for per in percentiles.items():
# per[0] = index => [0.25, 0.50, 0.75, 0.95, 0.99]
# per[1] = percentile value
cnt_metrics += 1
data = ("{p}.daemon.{m} {v} {t}\n"
.format(p=self.graphite_path,
m=("{:.2f}PercentileCpuUsagePct"
.format(per[0]).split('.')[1]),
v=per[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
cnt_metrics += 1
data = ("{p}.daemon.{m} {v} {t}\n"
.format(p=self.graphite_path,
m="StdCpuUsagePct",
v=dataframe.loc[:, 'CpuUsagePct'].std(),
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'calculate-percentages'):
for metric in daemon_percentage_metrics():
cnt_metrics += 1
log.info('calculating percentage for %s', metric.name)
try:
value = calculate_percentage_per_column(dataframe,
metric)
except KeyError:
log.warning("metric %s doesn't exist", metric.name)
else:
data = ("{p}.daemon.{m} {v} {t}\n"
.format(p=self.graphite_path,
m=metric.title,
v=value,
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'per-process-metrics'):
log.info("processing statistics per daemon")
indexed_by_worker = dataframe.set_index('Process_num')
metrics_per_worker = (indexed_by_worker
.loc[:, DAEMON_METRICS
+ ['CpuUsagePct']
+ DAEMON_AVG_METRICS])
cnt_metrics += metrics_per_worker.size
for worker, row in metrics_per_worker.iterrows():
for values in row.iteritems():
data = ("{p}.daemon.process.{w}.{m} {v} {t}\n"
.format(p=self.graphite_path,
w=worker,
m=values[0].replace('.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
if self.config.getboolean('process', 'calculate-percentages'):
for metric in daemon_percentage_metrics():
log.info('calculating percentage for %s per daemon',
metric.name)
_percentages = (metrics_per_worker
.loc[:, [metric.limit, metric.name]]
.apply(calculate_percentage_per_row,
axis=1,
args=(metric,)))
cnt_metrics += _percentages.size
for worker, row in _percentages.iterrows():
for values in row.iteritems():
data = ("{p}.daemon.process.{w}.{m} {v} {t}\n"
.format(p=self.graphite_path,
w=worker,
m=values[0].replace('.', '_'),
v=values[1],
t=self.timestamp))
dispatcher.signal('send', data=data)
data = ("{p}.haproxystats.MetricsHAProxy {v} {t}\n"
.format(p=self.graphite_path,
v=cnt_metrics,
t=self.timestamp))
dispatcher.signal('send', data=data)
log.info('number of HAProxy metrics %s', cnt_metrics)
log.info('finished processing statistics for HAProxy daemon')
