Logging handler to send logs to your OpenSearch cluster with bulk SSL. Forked from https://github.com/logzio/logzio-python-handler
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184 lines
6.7 KiB
184 lines
6.7 KiB
# This class is responsible for handling all asynchronous Logz.io's
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# communication
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import sys
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import json
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from time import sleep
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from datetime import datetime
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from threading import Thread, enumerate
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import requests
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from .logger import get_logger
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from .logger import get_stdout_logger
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if sys.version[0] == '2':
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import Queue as queue
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else:
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import queue as queue
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MAX_BULK_SIZE_IN_BYTES = 1 * 1024 * 1024 # 1 MB
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def backup_logs(logs, logger):
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timestamp = datetime.now().strftime('%d%m%Y-%H%M%S')
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logger.info(
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'Backing up your logs to logzio-failures-%s.txt', timestamp)
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with open('logzio-failures-{}.txt'.format(timestamp), 'a') as f:
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f.writelines('\n'.join(logs))
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class LogzioSender:
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def __init__(self,
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token, url='https://listener.logz.io:8071',
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logs_drain_timeout=5,
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debug=False,
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backup_logs=True,
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network_timeout=10.0,
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number_of_retries=4,
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retry_timeout=2):
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self.token = token
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self.url = '{}/?token={}'.format(url, token)
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self.logs_drain_timeout = logs_drain_timeout
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self.stdout_logger = get_stdout_logger(debug)
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self.backup_logs = backup_logs
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self.network_timeout = network_timeout
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self.requests_session = requests.Session()
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self.number_of_retries = number_of_retries
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self.retry_timeout = retry_timeout
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# Function to see if the main thread is alive
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self.is_main_thread_active = lambda: any(
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(i.name == 'MainThread') and i.is_alive() for i in enumerate())
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# Create a queue to hold logs
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self.queue = queue.Queue()
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self._initialize_sending_thread()
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def __del__(self):
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del self.stdout_logger
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del self.backup_logs
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del self.queue
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def _initialize_sending_thread(self):
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self.sending_thread = Thread(target=self._drain_queue)
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self.sending_thread.daemon = False
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self.sending_thread.name = 'logzio-sending-thread'
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self.sending_thread.start()
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def append(self, logs_message):
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if not self.sending_thread.is_alive():
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self._initialize_sending_thread()
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# Queue lib is thread safe, no issue here
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self.queue.put(json.dumps(logs_message))
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def flush(self):
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self._flush_queue()
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def _drain_queue(self):
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last_try = False
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while not last_try:
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# If main is exited, we should run one last time and try to remove
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# all logs
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if not self.is_main_thread_active():
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self.stdout_logger.debug(
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'Identified quit of main thread, sending logs one '
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'last time')
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last_try = True
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try:
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self._flush_queue()
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except Exception as e:
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self.stdout_logger.debug(
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'Unexpected exception while draining queue to Logz.io, '
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'swallowing. Exception: %s', e)
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if not last_try:
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sleep(self.logs_drain_timeout)
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def _flush_queue(self):
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# Sending logs until queue is empty
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while not self.queue.empty():
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logs_list = self._get_messages_up_to_max_allowed_size()
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self.stdout_logger.debug(
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'Starting to drain %s logs to Logz.io', len(logs_list))
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# Not configurable from the outside
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sleep_between_retries = self.retry_timeout
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self.number_of_retries = self.number_of_retries
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should_backup_to_disk = True
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headers = {"Content-type": "text/plain"}
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for current_try in range(self.number_of_retries):
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should_retry = False
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try:
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response = self.requests_session.post(
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self.url, headers=headers, data='\n'.join(logs_list),
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timeout=self.network_timeout)
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if response.status_code != 200:
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if response.status_code == 400:
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self.stdout_logger.info(
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'Got 400 code from Logz.io. This means that '
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'some of your logs are too big, or badly '
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'formatted. response: %s', response.text)
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should_backup_to_disk = False
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break
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if response.status_code == 401:
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self.stdout_logger.info(
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'You are not authorized with Logz.io! Token '
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'OK? dropping logs...')
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should_backup_to_disk = False
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break
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else:
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self.stdout_logger.info(
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'Got %s while sending logs to Logz.io, '
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'Try (%s/%s). Response: %s',
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response.status_code,
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current_try + 1,
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self.number_of_retries,
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response.text)
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should_retry = True
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else:
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self.stdout_logger.debug(
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'Successfully sent bulk of %s logs to '
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'Logz.io!', len(logs_list))
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should_backup_to_disk = False
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break
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except Exception as e:
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self.stdout_logger.warning(
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'Got exception while sending logs to Logz.io, '
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'Try (%s/%s). Message: %s',
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current_try + 1, self.number_of_retries, e)
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should_retry = True
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if should_retry:
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sleep(sleep_between_retries)
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if should_backup_to_disk and self.backup_logs:
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# Write to file
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self.stdout_logger.error(
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'Could not send logs to Logz.io after %s tries, '
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'backing up to local file system', self.number_of_retries)
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backup_logs(logs_list, self.stdout_logger)
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del logs_list
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def _get_messages_up_to_max_allowed_size(self):
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logs_list = []
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current_size = 0
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while not self.queue.empty():
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current_log = self.queue.get()
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try:
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current_size += sys.getsizeof(current_log)
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except TypeError:
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# pypy do not support sys.getsizeof
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current_size += len(current_log) * 4
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logs_list.append(current_log)
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if current_size >= MAX_BULK_SIZE_IN_BYTES:
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break
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return logs_list
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