Prometheus Metrics

emeet-pixyd exposes Prometheus-compatible metrics at /metrics using the OpenTelemetry SDK with the Prometheus exporter.

Accessing Metrics

curl http://127.0.0.1:8090/metrics

Or add a scrape target to your Prometheus config:

scrape_configs:
  - job_name: "emeet-pixyd"
    static_configs:
      - targets: ["localhost:8090"]
    metrics_path: /metrics

Metric	Type	Description
`emeet_pixyd_camera_state`	Float64Gauge	Current camera state (0=offline, 1=tracking, 2=idle, 3=privacy)
`emeet_pixyd_in_call`	Float64Gauge	Whether a call is detected (1=yes, 0=no)
`emeet_pixyd_auto_mode`	Float64Gauge	Current auto mode (0=off, 1=full, 2=tracking-only, 3=privacy-only)

Metric	Type	Description
`emeet_pixyd_commands_total`	Int64Counter	Total commands processed
`emeet_pixyd_uevents_total`	Int64Counter	Total netlink uevents received
`emeet_pixyd_probes_total`	Int64Counter	Total device probes
`emeet_pixyd_hid_failures_total`	Int64Counter	Total HID communication failures
`emeet_pixyd_frames_total`	Int64Counter	Total MJPEG frames served

Metric	Type	Description
`emeet_pixyd_stream_duration_seconds`	Float64Histogram	MJPEG stream session duration (unit: seconds)

Metrics use go.opentelemetry.io/otel SDK with go.opentelemetry.io/otel/exporters/prometheus
prometheus/client_golang is kept only for promhttp.Handler()
Metric registration is lazy via sync.Once — no init() functions
All record* functions are nil-safe — if OTel exporter init fails, metric recording silently no-ops

A JSON health endpoint is also available:

curl http://127.0.0.1:8090/api/health

{
  "status": "ok",
  "camera": "tracking",
  "version": "v1.0.0"
}

Returns 503 when the device is offline, 200 when online.