47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
import logging
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import sys
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from contextvars import ContextVar
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# Храним trace_id текущего потока/корутины.
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TRACE_ID: ContextVar[str] = ContextVar("trace_id", default="-")
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class TraceIdFilter(logging.Filter):
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# Добавляет trace_id в каждую запись лога для сквозной трассировки.
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def filter(self, record: logging.LogRecord) -> bool:
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record.trace_id = TRACE_ID.get()
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return True
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def set_trace_id(trace_id: str) -> None:
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TRACE_ID.set(trace_id)
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def setup_logging(level: str = "INFO", log_file: str | None = None) -> None:
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# stdout — основной поток для `docker logs`, Docker Desktop и compose logs.
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# stderr в PowerShell часто выглядит как NativeCommandError, хотя это обычные логи.
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handlers: list[logging.Handler] = [logging.StreamHandler(sys.stdout)]
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if log_file:
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handlers.append(logging.FileHandler(log_file, encoding="utf-8"))
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trace_filter = TraceIdFilter()
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for handler in handlers:
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handler.addFilter(trace_filter)
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handler.setLevel(getattr(logging, level.upper(), logging.INFO))
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root = logging.getLogger()
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root.setLevel(getattr(logging, level.upper(), logging.INFO))
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# Убираем старые хендлеры, чтобы не дублировать после fork.
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for old_handler in list(root.handlers):
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try:
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old_handler.close()
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except Exception:
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pass
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root.handlers.clear()
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for handler in handlers:
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root.addHandler(handler)
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root.propagate = False
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fmt = logging.Formatter(
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"%(asctime)s | %(levelname)s | %(name)s | trace=%(trace_id)s | %(message)s"
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)
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for handler in root.handlers:
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handler.setFormatter(fmt)
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