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jeremy de1d9e1d93 infra: full IaC state after hf-pdocker-01 rebuild (2026-03-08)

Replaces initial Nomad/Consul/Terraform skeleton with current Docker-based
infrastructure across all three nodes (hf-pdocker-01, hf-pdocker-02, bart).

Key changes:
- CLAUDE.md: updated service distribution reflecting hf-pdocker-01 restored
- docs/plans/2026-03-08-hf-pdocker-01-rebuild.md: new rebuild plan doc
- compose/bart/: ai-agents, guacamole, matrix, media, openvas, smarthome, watchtower
- compose/hf-pdocker-02/: traefik, monitoring, adguard, gitea, semaphore, wikijs,
  unifi, vaultwarden, actual-budget, mcpo, netclaw, trivy, watchtower, n8n
- compose/hf-pdocker-01/: frigate, frigate-notify, farm-agent
- stacks/: all Swarm stack definitions (monitoring, traefik, smarthome, matrix,
  guacamole, media, ai-agents, frigate, gitea, semaphore, wikijs, unifi, etc.)
- .gitignore: exclude .env credential files and acme.json certs
- .env.example: placeholder credential files for all services
- .claude/agents/: gitea-backup and other infrastructure agent configs
- scripts/: frigate media cleanup and NAS sync scripts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-08 18:51:25 -05:00

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Frigate Video Alerts via Matrix

Summary

A lightweight Python container that listens for Frigate object detection events via MQTT, analyzes snapshots with Claude Vision (Haiku), and posts rich notifications to a dedicated Matrix room with inline images and AI-generated descriptions.

Architecture

Frigate NVR (hf-pdocker-01)
  | MQTT: frigate/events
  v
Mosquitto Broker (:1883)
  |
  v
frigate-notify (Python container, hf-pdocker-01, host network)
  |-- Frigate API: GET /api/events/{id}/snapshot.jpg
  |-- Claude Vision API: analyze snapshot (Haiku)
  |-- Matrix API: upload image + send message
        v
  #video-alerts:hobbs.farm (@frigate:hobbs.farm bot)

Event Flow & Filtering

MQTT topic: frigate/events

Filtering:

Only type == "end" events (complete detection, best snapshot)
Only label in ["person", "car", "dog", "cat", "bird"]
Only score >= 0.7
Only if has_snapshot == true
Deduplication: skip duplicate event IDs within 30-second window per camera
Rate limit: max 1 notification per camera per 60 seconds

AI Vision Analysis

Model: claude-haiku-4-5-20251001 (~$0.001/event, ~$1.50/month at 50 events/day)
Prompt: "Briefly describe what's happening in this security camera image in 1-2 sentences. Focus on the people, vehicles, or animals and their activity. Be concise."
Max tokens: 150
Fallback: if Claude API fails, use structured description ("Person detected on {camera}")

Matrix Message Format

Two messages per event:

Image message (m.image): snapshot uploaded to Matrix content repository
Text message (m.text with HTML):

[camera_emoji] camera_name - Object - score%
AI-generated description of the scene.

Link: http://192.168.86.192:5000/review?id={event_id}
Timestamp

Bot: @frigate:hobbs.farm (new dedicated account) Room: #video-alerts:hobbs.farm (new room, @jeremy:hobbs.farm invited)

Container & Deployment

Location: compose/hf-pdocker-01/frigate-notify/

compose/hf-pdocker-01/frigate-notify/
  docker-compose.yml
  .env
  Dockerfile
  app/
    main.py          (~200 lines - MQTT listener, event processor)
    vision.py         (~40 lines - Claude Vision API wrapper)
    matrix_client.py  (~60 lines - image upload + message send)
    requirements.txt

Container config:

Image: custom, from python:3.12-slim
Network: host
Memory: 256M (memswap_limit: 256M)
Stateless (no persistent storage)
Health endpoint: port 5199, returns JSON status

Environment variables (.env):

ANTHROPIC_API_KEY
MATRIX_ACCESS_TOKEN
MATRIX_ROOM_ID
FRIGATE_URL=http://192.168.86.192:5000
MQTT_HOST=192.168.86.192
MQTT_PORT=1883

Error Handling

Claude API failure: fall back to structured message, never drop alert
Matrix API failure: retry 3x with exponential backoff (1s, 2s, 4s)
Snapshot fetch failure: send text-only notification
MQTT disconnect: paho-mqtt auto-reconnects
Invalid payload: log and skip

Observability

Structured JSON logging to stdout
Health endpoint at :5199/health with MQTT status, event count, last event time
Added to Prometheus blackbox probes (http-pdocker01 job)
ContainerDown alert covers it automatically

Decisions

Haiku over Sonnet: 10x cheaper, fast enough for security descriptions
host network: Frigate, Mosquitto, Synapse all on LAN IPs, simplest routing
aiohttp over matrix-nio: lighter, no crypto dependencies needed for bot usage
Two messages (image + text): image renders natively across all Matrix clients
End events only: best snapshot quality, avoids duplicate notifications

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