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libnovel/homelab/otel/alloy.river
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feat: add Grafana Faro RUM, fix dashboards, add Grafana to admin nav
- Add @grafana/faro-web-sdk to UI; wire initializeFaro in hooks.client.ts
  gated on PUBLIC_FARO_COLLECTOR_URL (no-op in dev)
- Add Grafana Alloy service (faro.receiver) to homelab compose;
  Faro endpoint → alloy:12347 (faro.libnovel.cc via cloudflared)
- Add PUBLIC_FARO_COLLECTOR_URL env var to docker-compose.yml UI service
- Add Web Vitals dashboard (web-vitals.json): LCP/INP/CLS/TTFB/FCP p75
  stats + LCP/TTFB time-series + Faro exception logs from Loki
- Fix runner.json: strip libnovel_ prefix from all metric names
- Fix backend.json: replace 5 dead http_client_* panels with
  spanmetrics-based equivalents (Request Rate by Span Name + Latency
  by Span Name p95)
- Fix OTel collector: add service.telemetry.metrics.address: 0.0.0.0:8888
  so Prometheus can scrape collector self-metrics
- Add Grafana link to admin nav external tools; add admin_nav_grafana
  message key to all 5 locale files; recompile paraglide
2026-04-05 12:58:16 +05:00

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// Grafana Alloy — Faro RUM receiver
//
// Receives browser telemetry (Web Vitals, traces, logs, exceptions) from the
// LibNovel SvelteKit frontend via the @grafana/faro-web-sdk.
//
// Pipeline:
// faro.receiver → receives HTTP POST /collect from browsers
// otelcol.exporter.otlphttp → forwards traces to OTel Collector → Tempo
// loki.write → forwards logs/exceptions to Loki
//
// The Faro endpoint is exposed publicly at faro.libnovel.cc via cloudflared.
// CORS is configured to allow requests from libnovel.cc.
faro.receiver "faro" {
server {
listen_address = "0.0.0.0"
listen_port = 12347
cors_allowed_origins = ["https://libnovel.cc", "https://www.libnovel.cc"]
}
output {
logs = [loki.write.faro.receiver]
traces = [otelcol.exporter.otlphttp.faro.input]
}
}
// Forward Faro traces to the OTel Collector (which routes to Tempo)
otelcol.exporter.otlphttp "faro" {
client {
endpoint = "http://otel-collector:4318"
tls {
insecure = true
}
}
}
// Forward Faro logs/exceptions directly to Loki
loki.write "faro" {
endpoint {
url = "http://loki:3100/loki/api/v1/push"
}
}