106 lines
3.6 KiB
Python
106 lines
3.6 KiB
Python
import json
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import logging
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import threading
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import monasca_agent.common.check_status as check_status
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import monasca_agent.common.emitter as emitter
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import monasca_agent.common.util as util
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log = logging.getLogger(__name__)
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# Since we call flush more often than the metrics aggregation interval, we should
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# log a bunch of flushes in a row every so often.
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FLUSH_LOGGING_PERIOD = 70
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FLUSH_LOGGING_INITIAL = 10
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FLUSH_LOGGING_COUNT = 5
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EVENT_CHUNK_SIZE = 50
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class Reporter(threading.Thread):
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"""The reporter periodically sends the aggregated metrics to the
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server.
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"""
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def __init__(self, interval, aggregator, api_host, event_chunk_size=None):
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threading.Thread.__init__(self)
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self.interval = int(interval)
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self.finished = threading.Event()
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self.aggregator = aggregator
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self.flush_count = 0
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self.log_count = 0
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self.api_host = api_host
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self.event_chunk_size = event_chunk_size or EVENT_CHUNK_SIZE
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@staticmethod
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def serialize_metrics(metrics):
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return json.dumps({"series": metrics})
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def stop(self):
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log.info("Stopping reporter")
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self.finished.set()
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def run(self):
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log.info("Reporting to %s every %ss" % (self.api_host, self.interval))
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# Persist a start-up message.
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check_status.MonascaStatsdStatus().persist()
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while not self.finished.isSet(): # Use camel case isSet for 2.4 support.
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self.finished.wait(self.interval)
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self.flush()
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# Clean up the status messages.
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log.debug("Stopped reporter")
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check_status.MonascaStatsdStatus.remove_latest_status()
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def flush(self):
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try:
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self.flush_count += 1
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self.log_count += 1
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metrics = self.aggregator.flush()
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count = len(metrics)
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if self.flush_count % FLUSH_LOGGING_PERIOD == 0:
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self.log_count = 0
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if count:
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try:
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emitter.http_emitter(metrics, log, self.api_host)
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except Exception:
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log.exception("Error running emitter.")
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events = self.aggregator.flush_events()
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event_count = len(events)
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if event_count:
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log.warn('Event received but events are not available in the monasca api')
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should_log = self.flush_count <= FLUSH_LOGGING_INITIAL or self.log_count <= FLUSH_LOGGING_COUNT
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log_func = log.info
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if not should_log:
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log_func = log.debug
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log_func(
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"Flush #%s: flushed %s metric%s and %s event%s" %
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(self.flush_count,
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count,
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util.plural(count),
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event_count,
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util.plural(event_count)))
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if self.flush_count == FLUSH_LOGGING_INITIAL:
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log.info(
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"First flushes done, %s flushes will be logged every %s flushes." %
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(FLUSH_LOGGING_COUNT, FLUSH_LOGGING_PERIOD))
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# Persist a status message.
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packet_count = self.aggregator.total_count
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packets_per_second = self.aggregator.packets_per_second(self.interval)
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check_status.MonascaStatsdStatus(flush_count=self.flush_count,
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packet_count=packet_count,
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packets_per_second=packets_per_second,
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metric_count=count,
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event_count=event_count).persist()
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except Exception:
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log.exception("Error flushing metrics")
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