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add collectd plugin for collecting running transcoder stats #14
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JulianJacobi
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116 changes: 116 additions & 0 deletions
116
ansible/roles/monitoring-client/templates/collectd/plugins/TranscodingUnits.py
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,116 @@ | ||
#!/usr/bin/env python | ||
# -*- coding: utf-8 -*- | ||
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from pydbus import SystemBus | ||
from gi.repository import GLib | ||
import collectd | ||
import re | ||
import time | ||
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DBUS_SYSTEMD = '.systemd1' | ||
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class NoSuchUnitException(Exception): | ||
pass | ||
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class SystemdCollector: | ||
""" | ||
Collector class to collect statistics about systemd units | ||
""" | ||
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def __init__(self): | ||
self.__monitored_units = [] | ||
self.__monitored_regexes = [] | ||
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self.__dbus = SystemBus() | ||
self.__systemd = self.__dbus.get(DBUS_SYSTEMD) | ||
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def add_unit(self, unit): | ||
""" | ||
add unit to scraping | ||
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:param unit: str name of a systemd unit | ||
""" | ||
try: | ||
unit_path = self.__systemd.GetUnit(unit) | ||
if unit_path not in self.__monitored_units: | ||
self.__monitored_units.append(unit_path) | ||
except GLib.Error as e: | ||
if 'NoSuchUnit' in e.message: | ||
raise NoSuchUnit('No Such Unit {}'.format(unit)) | ||
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def add_units_regex(self, regex): | ||
""" | ||
add all units to scraping, which names match the regex | ||
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:param regex: str regex | ||
""" | ||
if regex not in self.__monitored_regexes: | ||
self.__monitored_regexes.append(regex) | ||
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def collectd_config_callback(self, config): | ||
""" | ||
collectd plugin api compatile configuration callback | ||
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:param config: str configuration key | ||
""" | ||
for sub_conf in config.children: | ||
if sub_conf.key == 'UnitName': | ||
self.add_unit(sub_conf.values[0]) | ||
elif sub_conf.key == 'UnitRegex': | ||
self.add_units_regex(sub_conf.values[0]) | ||
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def collect_unit_stats(self): | ||
units = [] | ||
units.extend(self.__monitored_units) | ||
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for unit_tuple in self.__systemd.ListUnits(): | ||
for regex in self.__monitored_regexes: | ||
if re.match(regex, unit_tuple[0]) is not None: | ||
try: | ||
unit_path = self.__systemd.GetUnit(unit_tuple[0]) | ||
if unit_path not in units: | ||
units.append(unit_path) | ||
except GLib.Error: | ||
pass | ||
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stats = {} | ||
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for unit_path in units: | ||
unit = self.__dbus.get(DBUS_SYSTEMD, unit_path) | ||
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enabled = unit.UnitFileState == 'enabled' | ||
active = unit.ActiveState == 'active' | ||
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uptime = int(time.time() * 1000000) - unit.ActiveEnterTimestamp if active else 0 | ||
downtime = int(time.time() * 1000000) - unit.InactiveEnterTimestamp if not active else 0 | ||
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stats[unit.Id] = { | ||
"enabled": 1 if enabled else 0, | ||
"active": 1 if active else 0, | ||
"uptime": uptime, | ||
"downtime": downtime, | ||
} | ||
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return stats | ||
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def collectd_read_callback(self, data=None): | ||
""" | ||
collectd compatible read callback | ||
""" | ||
for unit_name, stats in self.collect_unit_stats().items(): | ||
for stat_name, value in stats.items(): | ||
vl = collectd.Values(plugin='systemd_units', type='gauge', type_instance="{}/{}".format(unit_name, stat_name), values=[value] ) | ||
vl.dispatch() | ||
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try: | ||
collector = SystemdCollector() | ||
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collectd.register_read(collector.collectd_read_callback) | ||
collectd.register_config(collector.collectd_config_callback) | ||
except (ImportError, AttributeError): | ||
collector = SystemdCollector() | ||
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collector.add_units_regex('transcode_(h264|vpx|audio)@[a-zA-Z0-9]{2,2}\.service') | ||
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print(collector.collect_unit_stats()) | ||
|
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I would prefer an all-lower-case filename because of FUD. Or an Emoji.