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fix(logging): ensure logs go to stderr, loggers obey levels (#3885)

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Important fix to the logging system
This commit is contained in:
Ashwin Bharambe 2025-10-22 13:06:54 -07:00
parent d7f9da6163
commit 0ffa8658b3
1 changed files with 15 additions and 6 deletions
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19
llama_stack/log.py
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@ -137,7 +137,8 @@ class CustomRichHandler(RichHandler):
# Set a reasonable default width for console output, especially when redirected to files # Set a reasonable default width for console output, especially when redirected to files
console_width = int(os.environ.get("LLAMA_STACK_LOG_WIDTH", "120")) console_width = int(os.environ.get("LLAMA_STACK_LOG_WIDTH", "120"))
# Don't force terminal codes to avoid ANSI escape codes in log files # Don't force terminal codes to avoid ANSI escape codes in log files
kwargs["console"] = Console(width=console_width) # Ensure logs go to stderr, not stdout
kwargs["console"] = Console(width=console_width, stderr=True)
super().__init__(*args, **kwargs) super().__init__(*args, **kwargs)
def emit(self, record): def emit(self, record):
@ -177,6 +178,7 @@ def setup_logging(category_levels: dict[str, int] | None = None, log_file: str |
log_file (str | None): Path to a log file to additionally pipe the logs into. log_file (str | None): Path to a log file to additionally pipe the logs into.
If None, reads from LLAMA_STACK_LOG_FILE environment variable. If None, reads from LLAMA_STACK_LOG_FILE environment variable.
""" """
global _category_levels
# Read from environment variables if not explicitly provided # Read from environment variables if not explicitly provided
if category_levels is None: if category_levels is None:
category_levels = dict.fromkeys(CATEGORIES, DEFAULT_LOG_LEVEL) category_levels = dict.fromkeys(CATEGORIES, DEFAULT_LOG_LEVEL)
@ -184,6 +186,9 @@ def setup_logging(category_levels: dict[str, int] | None = None, log_file: str |
if env_config: if env_config:
category_levels.update(parse_environment_config(env_config)) category_levels.update(parse_environment_config(env_config))
# Update the module-level _category_levels so that already-created loggers pick up the new levels
_category_levels.update(category_levels)
if log_file is None: if log_file is None:
log_file = os.environ.get("LLAMA_STACK_LOG_FILE") log_file = os.environ.get("LLAMA_STACK_LOG_FILE")
log_format = "%(asctime)s %(name)s:%(lineno)d %(category)s: %(message)s" log_format = "%(asctime)s %(name)s:%(lineno)d %(category)s: %(message)s"
@ -268,13 +273,17 @@ def setup_logging(category_levels: dict[str, int] | None = None, log_file: str |
} }
dictConfig(logging_config) dictConfig(logging_config)
# Ensure third-party libraries follow the root log level, but preserve # Update log levels for all loggers that were created before setup_logging was called
# already-configured loggers (e.g., uvicorn) and our own llama_stack loggers
for name, logger in logging.root.manager.loggerDict.items(): for name, logger in logging.root.manager.loggerDict.items():
if isinstance(logger, logging.Logger): if isinstance(logger, logging.Logger):
# Skip infrastructure loggers (uvicorn, fastapi) and our own loggers # Skip infrastructure loggers (uvicorn, fastapi) to preserve their configured levels
if name.startswith(("uvicorn", "fastapi", "llama_stack")): if name.startswith(("uvicorn", "fastapi")):
continue continue
# Update llama_stack loggers if root level was explicitly set (e.g., via all=CRITICAL)
if name.startswith("llama_stack") and "root" in category_levels:
logger.setLevel(root_level)
# Update third-party library loggers
elif not name.startswith("llama_stack"):
logger.setLevel(root_level) logger.setLevel(root_level)