refactor: improve logging to match serverless format by deanq · Pull Request #66 · runpod-workers/flash

deanq · 2026-02-13T00:26:26Z

Summary

Implements better retry logging for volume unpacking with clearer distinction between transient and terminal failures:

1-indexed retry attempts for user-friendliness (attempt 1 of 3 vs attempt 0 of 3)
WARNING level for expected retry failures (no traceback noise)
ERROR level only on final failure (with traceback via exc_info=True)
Clearer retry wait messages

Adds logger suppression pattern following runpod-python conventions:

Suppress urllib3 and uvicorn loggers to reduce console noise
Set to WARNING level in lb_handler at module import time
Lets uvicorn handle its own logging with defaults

Closed issues: Closes #65 (reverted broken changes but kept good retry improvements)

Test plan

All 240 tests pass
76% code coverage (well above 35% minimum)
All handler tests (14/14) pass
Quality checks: format, lint, type checking all pass

Implements better retry logging for volume unpacking with clearer distinction between transient and terminal failures: - 1-indexed retry attempts for user-friendliness - WARNING level for expected retry failures (no traceback) - ERROR level only on final failure (with traceback via exc_info=True) - Clearer retry wait messages Adds logger suppression pattern following runpod-python conventions: - Suppress urllib3 and uvicorn loggers to reduce console noise - Set to WARNING level in lb_handler at module import time - Lets uvicorn handle its own logging with defaults This avoids the earlier attempt to configure uvicorn handlers at import time (which failed due to race condition with handler creation). Simple suppression is cleaner and follows proven patterns from runpod-python. Closes #65 (reverted broken changes but kept good retry improvements)

- Create rp_logger_adapter.py with FlashLoggerAdapter wrapping RunPodLogger - Update logger.py with backward-compatible wrapper functions - Rewrite log_streamer.py to capture stdout instead of logging handlers - Replace logging.getLogger() with get_flash_logger() in 10 source files - Add comprehensive unit tests for adapter layer (38 tests) - Enable automatic JSON logging in production (RUNPOD_ENDPOINT_ID) Key benefits: - Visual consistency with runpod-python ecosystem - Simplified output without redundant timestamps - Automatic structured logging in production - Namespace prefixes for better traceability All 474+ tests pass, 76.64% code coverage, quality checks pass.

Copilot

Pull request overview

This PR refactors the logging system to use RunPod's RunPodLogger instead of Python's standard logging module, and improves retry logging for volume unpacking operations. The changes introduce a new adapter layer (rp_logger_adapter.py) that wraps RunPodLogger with a standard logging-like interface for backward compatibility.

Changes:

Introduces FlashLoggerAdapter to wrap RunPodLogger with printf-style formatting and namespace prefixes
Improves retry logging with 1-indexed attempts, WARNING level for non-final failures, and ERROR with traceback for final failures
Updates log streaming to capture stdout directly instead of using logging handlers (since RunPodLogger prints to stdout)

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
`src/rp_logger_adapter.py`	New adapter layer wrapping RunPodLogger with logging-like interface
`tests/unit/test_rp_logger_adapter.py`	Comprehensive test suite for logger adapter (353 lines)
`src/unpack_volume.py`	Improved retry logging with 1-indexed attempts and appropriate log levels
`tests/unit/test_unpack_volume.py`	Updated tests to verify new warning/error logging behavior
`src/logger.py`	Backward compatibility wrapper delegating to rp_logger_adapter
`src/log_streamer.py`	Changed from logging handlers to stdout capture for RunPodLogger compatibility
`src/subprocess_utils.py`	Duck-typed logger support for both logging.Logger and FlashLoggerAdapter
`src/remote_executor.py`	Migrated to get_flash_logger
`src/dependency_installer.py`	Migrated to get_flash_logger
`src/cache_sync_manager.py`	Migrated to get_flash_logger
`src/manifest_reconciliation.py`	Migrated to get_flash_logger
`src/lb_handler.py`	Migrated to setup_flash_logging and get_flash_logger
`src/handler.py`	Migrated to setup_flash_logging
`CLAUDE.md`	Simplified and cleaned up documentation

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Copilot · 2026-02-13T04:59:06Z

src/lb_handler.py

+setup_flash_logging()
+logger = get_flash_logger(__name__)


The PR description mentions "Suppress urllib3 and uvicorn loggers to reduce console noise" and "Set to WARNING level in lb_handler at module import time", but this functionality is not implemented in the code changes. There is no code that suppresses these loggers or sets their levels to WARNING.

src/unpack_volume.py

Copilot · 2026-02-13T04:59:06Z

src/rp_logger_adapter.py

+    def debug(self, msg: str, *args, **kwargs) -> None:
+        """Log a debug message."""
+        # Accept but ignore exc_info and other kwargs for compatibility
+        line = self._build_log_line("DEBUG", msg, args)
+        self._rp_logger.debug(line)
+
+    def info(self, msg: str, *args, **kwargs) -> None:
+        """Log an info message."""
+        line = self._build_log_line("INFO", msg, args)
+        self._rp_logger.info(line)
+
+    def warning(self, msg: str, *args, **kwargs) -> None:
+        """Log a warning message."""
+        line = self._build_log_line("WARN", msg, args)
+        self._rp_logger.warn(line)
+
+    def warn(self, msg: str, *args, **kwargs) -> None:
+        """Log a warning message (alias for warning)."""
+        self.warning(msg, *args, **kwargs)
+
+    def error(self, msg: str, *args, **kwargs) -> None:
+        """Log an error message."""
+        line = self._build_log_line("ERROR", msg, args)
+        self._rp_logger.error(line)


The exc_info keyword argument is accepted but completely ignored in all logging methods. This means that when logger.error(..., exc_info=True) is called (e.g., in unpack_volume.py line 155), the traceback will not be included in the log output. This defeats the purpose of having different behavior for final vs non-final failures. The adapter should handle exc_info=True by capturing and formatting the traceback, similar to how the standard logging module does.

src/subprocess_utils.py

Copilot · 2026-02-13T04:59:07Z

src/rp_logger_adapter.py

+def setup_flash_logging(level: Optional[str] = None) -> None:
+    """
+    Setup RunPodLogger with the specified log level.
+
+    Reads log level from environment variables in order of precedence:
+    1. RUNPOD_LOG_LEVEL (preferred)
+    2. LOG_LEVEL (deprecated but supported)
+    3. "INFO" (default)
+
+    Args:
+        level: Optional log level override (DEBUG, INFO, WARN, ERROR)
+    """
+    if level is None:
+        level = os.environ.get("RUNPOD_LOG_LEVEL") or os.environ.get("LOG_LEVEL", "INFO")
+
+    level = level.upper()
+
+    # Validate and set log level
+    valid_levels = {"DEBUG", "INFO", "WARN", "ERROR"}
+    if level not in valid_levels:
+        level = "INFO"
+
+    rp_logger = _get_rp_logger()
+
+    # RunPodLogger uses string-based level setting
+    if level == "DEBUG":
+        rp_logger.debug("Debug logging enabled")
+    elif level == "WARN":
+        rp_logger.warn(f"Log level set to {level}")
+    elif level == "ERROR":
+        rp_logger.error(f"Log level set to {level}")
+    # INFO is default, no action needed


The setup_flash_logging function doesn't actually configure the log level on the RunPodLogger instance. It just calls logger methods (debug, warn, error) to log messages, which doesn't change what level of logs will be shown. This function should either call a proper configuration method on RunPodLogger (if available) or document that RunPodLogger's level is configured through other means (e.g., environment variables read by RunPodLogger itself).

yeah this doesnt seem like it does anything

tests/unit/test_rp_logger_adapter.py

Resolve 6 Copilot review comments: 1. Add logger suppression for urllib3/uvicorn (lost in RunPodLogger migration) 2. Remove redundant _UNPACKED assignment in unpack_volume 3. Implement exc_info parameter handling for exception tracebacks 4. Use get_flash_logger() consistently in subprocess_utils fallback 5. Actually configure RunPodLogger level in setup_flash_logging() 6. Move duplicate import to module level in tests - Added sys/traceback imports for exc_info handling - Created _append_traceback() helper for consistent traceback appending - All logging methods now properly handle exc_info=True - Added 3 new test cases for exc_info scenarios - All 281 tests pass, 76.74% coverage (exceeds 35% requirement)

deanq force-pushed the fix/revert-broken-logging branch from 16e4ade to ad81bb6 Compare February 13, 2026 00:36

deanq requested a review from Copilot February 13, 2026 04:54

Copilot started reviewing on behalf of deanq February 13, 2026 04:55 View session

Copilot AI reviewed Feb 13, 2026

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deanq changed the title ~~refactor: improve unpacking retry logging and suppress noisy loggers~~ refactor: improve logging to match serverless format Feb 14, 2026

deanq mentioned this pull request Feb 14, 2026

fix: improve mothership recognition #67

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refactor: improve logging to match serverless format#66

refactor: improve logging to match serverless format#66
deanq wants to merge 3 commits intomainfrom
fix/revert-broken-logging

deanq commented Feb 13, 2026 •

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deanq commented Feb 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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deanq commented Feb 13, 2026 •

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