Pipeline filter state (overlays, layout, cell_map, audio) живёт в RAM
ffmpeg process. При recreate container (compose up, OOM, NVENC crash,
config change) state lost — controller'у нужно re-push.
Раньше user'у приходилось вручную:
curl POST /layout/.../set
docker restart cuda-grid-controller # для browser/dynamic re-register
Теперь автоматизировано:
PipelineMonitor polls ZMQ каждые 3 sec (no-op set_layout).
On timeout/error → mark instance lost.
First success after lost → trigger restore:
1. set_layout к state.active_layout
2. set_audio_output_enabled к state.audio_output_enabled
3. re-push все overlays из state.overlays
4. browser/dynamic/frigate hooks: mark_all_unregistered() —
их loops автоматически re-add на next iteration
Verified test: docker restart cuda-grid-pipeline → 10 sec downtime →
monitor logs lost+restored+restore_done с count=6 overlays.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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