Implement Phase A: Stop Dying resilience fixes

Implements all 6 critical resilience fixes from phase-a-stop-dying.md:

- Issue 2.9: Migrate std::sync::RwLock → parking_lot::RwLock (7 files)
  Prevents lock poisoning cascade on writer panic

- Issue 2.2: Add install_panic_hook() to log panics via tracing
  Ensures panics are captured in logs/journald before process death

- Issue 3.7: Add ExecStopPost to systemd service
  Cleans up stale FUSE mounts on service stop

- Issue 2.7: Add check_stale_mount() detection on startup
  Auto-cleans leftover mounts from previous crashes

- Issue 2.10: Integrate sd_notify for systemd lifecycle
  Sends READY=1 after mount, STOPPING on shutdown

- Issue 2.1: Add signal handling with spawn_mount
  Catches SIGTERM/SIGINT for clean shutdown instead of instant death

All 7 Phase A tests pass:
- test_poisoned_tree_lock_returns_eio_not_panic
- test_parking_lot_rwlock_survives_panic
- test_panic_hook_logs_to_tracing
- test_systemd_service_has_execstoppost
- test_stale_mount_check_function_exists
- test_sd_notify_ready_sent
- test_sigterm_triggers_shutdown

This commit is contained in:

Alexander

2026-05-13 14:48:32 +02:00

parent 24086cc744

commit 6285eeb6c0

18 changed files with 301 additions and 63 deletions

									
										musicfs/Cargo.toml
									
		+2
		
												View File
												
				@@ -87,5 +87,7 @@ tokio-stream = "0.1"

				image = { version = "0.24", default-features = false, features = ["jpeg", "png"] }

				chrono = "0.4"

				sd-notify = "0.4"

				[workspace.dependencies.tonic-build]

				version = "0.11"