Cody Lee 521c2f88bc feat(otelunifi): add OpenTelemetry output plugin (#978) ...

* feat(otelunifi): add OpenTelemetry output plugin

Adds a new push-based output plugin that exports UniFi metrics to any
OTLP-compatible backend (Grafana Alloy/Mimir, Honeycomb, Datadog via
OTel, New Relic, etc.) using the Go OpenTelemetry SDK v1.42.

Config (default disabled):
  [otel]
  url      = "http://localhost:4318"
  protocol = "http"   # or "grpc"
  interval = "30s"
  timeout  = "10s"
  disable  = false
  api_key  = ""       # optional Bearer auth

Env var prefix: UP_OTEL_*

Exported metrics:
- Sites:   user/guest/IoT counts, AP/GW/SW counts, latency, uptime,
           tx/rx rates per subsystem
- Clients: uptime, rx/tx bytes & rates; signal/noise/RSSI for wireless
- UAP:     up, uptime, CPU/mem, load, per-radio channel/power,
           per-VAP station count/satisfaction/bytes
- USW:     up, uptime, CPU/mem, load, aggregate rx/tx bytes,
           per-port up/speed/bytes/packets/errors/dropped/PoE
- USG:     up, uptime, CPU/mem, load, per-WAN rx/tx bytes/packets/errors
- UDM/UXG: up, uptime, CPU/mem, load averages

Closes #933

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

* fix(otelunifi): rename unused ctx parameter to _ in recordGauge

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

* fix(otelunifi): replace Disable with Enable (default false)

Plugin is opt-in: set enable=true / UP_OTEL_ENABLE=true to activate.
Closes part of #933.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

2026-03-23 18:19:18 -05:00

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