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ChuckandClaude Opus 5.5
64c7289593
If the render loop gets stuck inside a plugin's display(), ledmatrix.service stays active and the panel stays frozen. This adds a way to detect that. - src/display_watchdog.py (standard library only) sends sd_notify over $NOTIFY_SOCKET and writes /run/ledmatrix/display-heartbeat.json. Only the render thread counts: beats from other threads are ignored. - ledmatrix.service: WatchdogSec=120, NotifyAccess=main, RuntimeDirectory=ledmatrix (0755), RestartSteps=4 and RestartMaxDelaySec=2min. It stays Type=simple. run.py widens the watchdog to 15 min for start-up, and load_plugin() does the same on the render thread. The loop arms after its first frame. - /api/v3/health adds checks.display_loop: running, stalled (no heartbeat for over 60s, which makes the status degraded) or not_reported. With web login on, a caller who is not logged in still gets only healthy/degraded, and a stall degrades that answer. - The update verifier requires a fresh heartbeat from the restarted display when the display it replaced was writing one. A frozen panel is rolled back. - Existing installs get the systemd watchdog only after install_service.sh is re-run. The heartbeat works right away. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
62 lines
2.6 KiB
Python
Executable File
62 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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import logging
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import sys
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import os
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import argparse
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# Prevent Python from creating __pycache__ directories in plugin dirs.
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# The root service loads plugins via importlib, and root-owned __pycache__
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# files block the web service (non-root) from updating/uninstalling plugins.
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sys.dont_write_bytecode = True
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# Add project directory to Python path (needed before importing src modules)
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project_dir = os.path.dirname(os.path.abspath(__file__))
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if project_dir not in sys.path:
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sys.path.insert(0, project_dir)
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# Under systemd the watchdog clock is already running, and start-up (plugin
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# loads, initial updates) takes far longer than the render loop's limit. Widen
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# it before anything slow is imported; the render loop narrows it again once
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# its first frame is on the panel. A no-op outside systemd. Standard library
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# only -- see src/display_watchdog.py.
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from src import display_watchdog
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display_watchdog.watchdog.begin_startup()
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# Parse command-line arguments BEFORE any imports
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parser = argparse.ArgumentParser(description='LEDMatrix Display Controller')
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parser.add_argument('-e', '--emulator', action='store_true',
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help='Run in emulator mode (uses pygame/RGBMatrixEmulator instead of hardware)')
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parser.add_argument('-d', '--debug', action='store_true',
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help='Enable debug logging and verbose output')
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args = parser.parse_args()
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# Set emulator mode if requested (must be done BEFORE any imports that check EMULATOR env var)
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if args.emulator:
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os.environ["EMULATOR"] = "true"
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print("=" * 60)
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print("LEDMatrix Emulator Mode Enabled")
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print("=" * 60)
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print("Using pygame/RGBMatrixEmulator for display")
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print("Press ESC to exit\n")
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# Debug output (only in debug mode or emulator mode)
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debug_mode = args.debug or args.emulator or os.environ.get('LEDMATRIX_DEBUG', '').lower() == 'true'
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if debug_mode:
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print(f"DEBUG: Project directory: {project_dir}", flush=True)
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print(f"DEBUG: Python path[0]: {sys.path[0]}", flush=True)
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print(f"DEBUG: Current working directory: {os.getcwd()}", flush=True)
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print(f"DEBUG: EMULATOR mode: {os.environ.get('EMULATOR', 'false')}", flush=True)
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# Configure logging before importing any other modules
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# Use centralized logging configuration
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from src.logging_config import setup_logging
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log_level = logging.DEBUG if debug_mode else logging.INFO
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format_type = 'readable' # Use 'json' for structured logging in production
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setup_logging(level=log_level, format_type=format_type, include_location=debug_mode)
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# Now import the display controller
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from src.display_controller import main
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if __name__ == "__main__":
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main() |