mirror of
https://github.com/blakeblackshear/frigate.git
synced 2024-10-15 20:07:23 +02:00
dc54981784
* Moved FrigateApp.init_config() into FrigateConfig.load() * Move frigate config loading into main * Store PlusApi in FrigateConfig * Register SIGTERM handler in main * Ensure logging is setup during config parsing * Removed pointless try * Moved config initialization out of FrigateApp * Made FrigateApp.shm_frame_count into a function * Removed log calls from signal handlers python's logging calls are not re-entrant, which caused at least one of these to deadlock randomly. * Reopen stdout/err on process fork This helps avoid deadlocks (https://github.com/python/cpython/issues/91776). * Make mypy happy * Whoops. I might have forgotten to save. Truly an amateur mistake. * Always call FrigateApp.stop()
121 lines
3.5 KiB
Python
121 lines
3.5 KiB
Python
import atexit
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import logging
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import multiprocessing as mp
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import os
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import sys
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import threading
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from collections import deque
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from contextlib import AbstractContextManager, ContextDecorator
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from logging.handlers import QueueHandler, QueueListener
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from types import TracebackType
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from typing import Deque, Optional
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from typing_extensions import Self
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from frigate.util.builtin import clean_camera_user_pass
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LOG_HANDLER = logging.StreamHandler()
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LOG_HANDLER.setFormatter(
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logging.Formatter(
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"[%(asctime)s] %(name)-30s %(levelname)-8s: %(message)s",
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"%Y-%m-%d %H:%M:%S",
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)
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)
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LOG_HANDLER.addFilter(
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lambda record: not record.getMessage().startswith(
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"You are using a scalar distance function"
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)
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)
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class log_thread(AbstractContextManager, ContextDecorator):
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def __init__(self, *, handler: logging.Handler = LOG_HANDLER):
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super().__init__()
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self._handler = handler
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log_queue: mp.Queue = mp.Queue()
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self._queue_handler = QueueHandler(log_queue)
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self._log_listener = QueueListener(
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log_queue, self._handler, respect_handler_level=True
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)
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@property
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def handler(self) -> logging.Handler:
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return self._handler
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def _stop_thread(self) -> None:
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self._log_listener.stop()
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def __enter__(self) -> Self:
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logging.getLogger().addHandler(self._queue_handler)
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atexit.register(self._stop_thread)
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self._log_listener.start()
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return self
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def __exit__(
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self,
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exc_type: Optional[type[BaseException]],
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exc_info: Optional[BaseException],
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exc_tb: Optional[TracebackType],
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) -> None:
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logging.getLogger().removeHandler(self._queue_handler)
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atexit.unregister(self._stop_thread)
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self._stop_thread()
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# When a multiprocessing.Process exits, python tries to flush stdout and stderr. However, if the
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# process is created after a thread (for example a logging thread) is created and the process fork
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# happens while an internal lock is held, the stdout/err flush can cause a deadlock.
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#
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# https://github.com/python/cpython/issues/91776
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def reopen_std_streams() -> None:
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sys.stdout = os.fdopen(1, "w")
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sys.stderr = os.fdopen(2, "w")
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os.register_at_fork(after_in_child=reopen_std_streams)
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# based on https://codereview.stackexchange.com/a/17959
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class LogPipe(threading.Thread):
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def __init__(self, log_name: str):
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"""Setup the object with a logger and start the thread"""
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threading.Thread.__init__(self)
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self.daemon = False
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self.logger = logging.getLogger(log_name)
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self.level = logging.ERROR
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self.deque: Deque[str] = deque(maxlen=100)
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self.fdRead, self.fdWrite = os.pipe()
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self.pipeReader = os.fdopen(self.fdRead)
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self.start()
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def cleanup_log(self, log: str) -> str:
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"""Cleanup the log line to remove sensitive info and string tokens."""
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log = clean_camera_user_pass(log).strip("\n")
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return log
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def fileno(self) -> int:
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"""Return the write file descriptor of the pipe"""
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return self.fdWrite
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def run(self) -> None:
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"""Run the thread, logging everything."""
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for line in iter(self.pipeReader.readline, ""):
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self.deque.append(self.cleanup_log(line))
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self.pipeReader.close()
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def dump(self) -> None:
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while len(self.deque) > 0:
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self.logger.log(self.level, self.deque.popleft())
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def close(self) -> None:
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"""Close the write end of the pipe."""
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os.close(self.fdWrite)
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