У меня проблема с подтверждением сообщения GCP Pub / Sub Subscriber. Я написал три класса: PubSubPublisher (публикация в теме), PubSubSubscriber (получение от подписки и индексирование наasticsearch) и ElasticDailyIndexManager (Thread). Вот что я с ними делаю:
Я публикую 100 тыс. Фиктивных сообщений в своей теме (это делается примерно с 10 тыс. Сообщений в секунду) с помощью PubSubPublisher.
Я запускаю PubSubSubscriber.receive_and_index () в первый раз. Обрабатывая сообщения, он также индексирует их в Elasticsearch, используя 10 потоков ElasticDailyIndexManager. Обычно я подключаюсь к подписке и читаю (и индексирую) в течение 60 секунд и выхожу. 100k индексируются в Elasticsearch (это делается примерно с 1,5 тыс. Сообщений в секунду).
Я запускаю PubSubSubscriber.receive_and_index () второй раз - я не ожидаю, что ничего будет проиндексировано, однако, индексируется около 40 тыс. Новых документов (Id является случайным вasticsearch).
Иногда требуется около 3-4 запусков, чтобы очистить подписку, поэтому я думаю, что есть проблема с подтверждением сообщений, но нет ошибок во время выполнения. Я индексирую данные вместе с message.message_id, и ясно, что у меня есть несколько строк с одинаковым message_id.
Я не вижу причины, по которой подписчик не может подтвердить это, поскольку он не выдает никаких ошибок. Я установил 30-секундный тайм-аут подтверждения при подписке, но это не помогло.
Ниже код для указанных классов:
class ProcessFutures(Thread):
def __init__(self, futures_queue):
Thread.__init__(self)
self.queue = futures_queue
self.counter = 0
self.results = list()
self.daemon = True
self.start()
def run(self):
while getattr(self, 'keep_going', True):
future = self.queue.get()
self.results.append(future.result())
self.queue.task_done()
class PubSubPublisher:
def __init__(self, project_id, topic_name):
self.client = pubsub_v1.PublisherClient()
self.project_id = project_id
self.topic_name = topic_name
self.keep_going = True
self.futures_queue = Queue()
self.future_process = ProcessFutures(self.futures_queue)
def publish_message(self, message_body):
"""
Publishes message to a Pub/Sub topic.
future.result is verified in separate thread to avoid blocking of message publishing.
"""
topic_path = self.client.topic_path(self.project_id, self.topic_name)
if isinstance(message_body, dict):
data = dumps(message_body)
elif isinstance(message_body, str):
data = message_body
else:
raise BaseException
data = data.encode('utf-8')
future = self.client.publish(topic_path, data=data)
self.futures_queue.put(future)
def finish(self):
self.future_process.queue.join()
print("Processed results: " + str(len(self.future_process.results)))
@click.command()
@click.option('--project-id', '-p', required=True, type=str, help='Google Cloud Platform Project Id')
@click.option('--topic', '-t', required=True, type=str, help='Pub/Sub Topic to which messages will be published')
@click.option('--message', '-m', required=True, type=str, help='Message body')
@click.option('--amount', '-a', required=True, type=int, help='How many messages to send')
def run(project_id, topic, message, amount):
from time import time
psp = PubSubPublisher(project_id, topic)
time_start = time()
for i in range(amount):
message_body = dict(i=i, message=message)
psp.publish_message(message_body)
psp.finish()
time_stop = time()
seconds = time_stop - time_start
print("Published {} messages in {:.2f} seconds. That is {:.2f} mps!".format(amount, seconds,
amount / seconds))
from elasticsearch import Elasticsearch, ElasticsearchException, NotFoundError, helpers
from datetime import datetime
from json import load
from threading import Thread
from queue import Queue
from os import getenv
from config import BASE_PATH
class ElasticDailyIndexManager(Thread):
def __init__(self, index_basename):
Thread.__init__(self)
es_port = 9200 if ElasticDailyIndexManager.str_to_bool(getenv("RUNNING_IN_CONTAINER", "False")) else 9201
es_url = "elastic" if ElasticDailyIndexManager.str_to_bool(getenv("RUNNING_IN_CONTAINER", "False")) else "localhost"
self.es = Elasticsearch(hosts=[es_url], port=es_port)
self.index_template_name = index_basename
self.index_name_mask = index_basename if index_basename.endswith("-") else index_basename + "-"
while not self._template_exists():
self._register_index_template()
self.queue = Queue()
self.daemon = True
self.start()
def run(self):
def generator():
while True:
message_body, message_id = self.queue.get()
metadata = dict()
self.queue.task_done()
yield self._prepare_bulk_doc(message_body, **metadata)
bulk_load = helpers.streaming_bulk(self.es, generator(), 10, yield_ok=False)
while True:
for success, info in bulk_load:
print(success, info)
def index_document(self, document_body, id=None):
document_body['@timestamp'] = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S')
try:
self.es.index(index=self.index_name_mask + datetime.utcnow().strftime('%Y.%m.%d'),
doc_type='default',
body=document_body,
id=id)
except ElasticsearchException as e:
print(document_body, id, e.args)
def _register_index_template(self):
template_body = self._get_json_file_content("{}/config/templates/{}.json".format(BASE_PATH,
self.index_template_name))
try:
if template_body is not None:
self.es.indices.put_template(name=self.index_template_name,
body=template_body,
master_timeout="60s")
except ElasticsearchException as e:
print(e.args)
def _template_exists(self):
try:
self.es.indices.get_template(self.index_template_name)
return True
except NotFoundError:
return False
@staticmethod
def _get_json_file_content(file_dir_arg):
"""
Wrapper on load function. Expects file with JSON inside.
:param file_dir_arg: Path to file to be read.
:return: Dictionary (Encoded JSON)
"""
result = None
try:
with open(file_dir_arg, 'r', encoding='UTF-8-SIG') as f:
result_tmp = f
result = load(result_tmp)
except Exception as e:
print(e.args)
return result
def _prepare_bulk_doc(self, source_arg, **kwargs):
"""
Function providing unified document structure for indexing in elasticsearch.
The structure needs to be compliant with
:param index_arg: index to which send data
:param doc_type_arg: document type in index_arg
:param source_arg: body of document
:param kwargs: additional meta parameters (like doc _id)
:return: Reformatted & enhanced source_arg
"""
metadata = dict(**kwargs).get('metadata', dict())
source_arg['@timestamp'] = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S')
result = {
'_index': self.index_name_mask + datetime.utcnow().strftime('%Y.%m.%d'),
'_type': 'default',
'_op_type': 'index',
'doc': source_arg,
'doc_as_upsert': False
}
result.update(metadata)
return result
@staticmethod
def str_to_bool(str_arg):
if str_arg.lower() == 'true':
return True
elif str_arg.lower() == 'false':
return False
else:
return None
ELASTIC_MANAGERS = environ.get("ElASTIC_MANAGERS", 10)
class PubSubSubscriber:
def __init__(self, project_id_arg, topic_name_arg, seconds_arg=None):
self.elasticsearch_index_managers = list()
for _ in range(ELASTIC_MANAGERS):
self.elasticsearch_index_managers.append(ElasticDailyIndexManager(topic_name_arg))
self.project_id = project_id_arg
self.topic_name = topic_name_arg
self.client = pubsub_v1.SubscriberClient()
self.counter = 0
self.latencies = list()
self.seconds = seconds_arg
self.lock = Lock()
def receive_and_index(self):
subscription_path = self.client.subscription_path(self.project_id,
"{}-subscription-elastic".format(self.topic_name))
def callback(message):
latency = message._received_timestamp - message.publish_time.timestamp()
document = PubSubSubscriber.struct_message(message.data)
document['message_id'] = message.message_id
self.elasticsearch_index_managers[self.counter % ELASTIC_MANAGERS].queue.put((document, None))
message.ack()
if self.seconds:
self.latencies.append(latency)
self.counter += 1
future = self.client.subscribe(subscription_path, callback=callback)
try:
# When timeout is unspecified, the result method waits indefinitely.
print('Listening for messages on {}'.format(subscription_path))
print('Running for{}'.format(' ' + str(self.seconds) + 'seconds...' if self.seconds else 'ever'))
future.result(timeout=self.seconds)
except Exception as e:
print('Listening for messages on {} threw an Exception: {}.'.format(subscription_path, e))
finally:
time_queue_join_start = time()
for manager in self.elasticsearch_index_managers:
manager.queue.join()
time_queue_join_stop = time()
self.seconds = self.seconds + time_queue_join_stop - time_queue_join_start
print("Read {} messages in {:.2f} seconds. That is {:.2f} mps!".format(self.counter, self.seconds,
self.counter / self.seconds))
if self.latencies:
avg_latency = float(sum(self.latencies)) / float(len(self.latencies))
print("Average latency was {:.2f} ms.".format(avg_latency))
@staticmethod
def struct_message(message_arg, encoding='utf-8'):
if isinstance(message_arg, dict):
message = message_arg
elif isinstance(message_arg, bytes):
message = PubSubSubscriber.message_to_dict(message_arg.decode(encoding))
elif isinstance(message_arg, str):
message = PubSubSubscriber.message_to_dict(message_arg)
else:
message = None
group_topics = message.get("group", dict()).get("group_topics", dict())
if group_topics:
message['group']['group_topics'] = [d['topic_name'] for d in message['group']['group_topics']]
# time handling
event_time = PubSubSubscriber.epoch_to_strtime(message.get("event", dict()).get("time", None))
if event_time:
message['event']['time'] = event_time
mtime = PubSubSubscriber.epoch_to_strtime(message.get("mtime", None))
if mtime:
message['mtime'] = mtime
# geo handling
group_geo_lat = message.get("group", dict()).get("group_lat", None)
group_geo_lon = message.get("group", dict()).get("group_lon", None)
if group_geo_lon and group_geo_lat:
message['group']['group_geo'] = PubSubSubscriber.create_geo_object(group_geo_lat, group_geo_lon)
venue_geo_lat = message.get("venue", dict()).get("lat", None)
venue_geo_lon = message.get("venue", dict()).get("lon", None)
if venue_geo_lon and venue_geo_lat:
message['venue']['venue_geo'] = PubSubSubscriber.create_geo_object(venue_geo_lat, venue_geo_lon)
return message
@staticmethod
def epoch_to_strtime(epoch_time):
try:
result = strftime('%Y-%m-%dT%H:%M:%S', localtime(epoch_time / 1000))
except:
result = epoch_time
return result
@staticmethod
def create_geo_object(lat, lon):
return "{}, {}".format(str(lat), str(lon))
@staticmethod
def message_to_dict(message_arg):
keep_going = True
result = message_arg
while keep_going and (not isinstance(result, dict)):
try:
result = loads(result)
except JSONDecodeError:
result = None
keep_going = False
return result
@click.command()
@click.option('--project-id', '-p', required=True, type=str, help='Google Cloud Platform Project Id')
@click.option('--topic', '-t', required=True, type=str, help='Pub/Sub Topic from which messages will be read')
@click.option('--seconds', '-s', default=None, required=False, type=int, help='For how long to read messages. If not provided - run forever')
def run(project_id, topic, seconds):
pss = PubSubSubscriber(project_id, topic, seconds)
pss.receive_and_index()
if __name__ == '__main__':
run()