blumeops/docs/reference/operations/observability.md

44 lines
2.1 KiB
Markdown
Raw Normal View History

---
title: Observability
modified: 2026-03-26
tags:
- operations
---
# Observability
Add OpenTelemetry distributed tracing (Tempo + Beyla eBPF) (#286) ## Summary Adds the third observability pillar — **distributed tracing** — alongside existing metrics (Prometheus) and logs (Loki). - **Grafana Tempo 2.10.1** on minikube-indri for trace storage with 7d retention, OTLP receivers, and `metrics_generator` that remote-writes span-metrics (RED) to Prometheus - **Beyla eBPF auto-instrumentation** via a privileged Alloy DaemonSet on ringtail — instruments HTTP services (Frigate, ntfy, Ollama, Immich) without code changes - **Grafana integration** — Tempo datasource with trace↔log and trace↔metrics correlation, plus Loki derivedFields for trace ID linking - **Prometheus** scrapes Tempo operational metrics ### Architecture ``` ringtail (k3s) indri (minikube) ┌──────────────────────┐ ┌─────────────────────┐ │ Alloy+Beyla (eBPF) │──OTLP HTTP────────→ │ Tempo │ │ ↳ Frigate, ntfy, │ via tailnet │ ↳ trace storage │ │ Ollama, Immich │ │ ↳ RED → Prometheus │ └──────────────────────┘ │ │ │ Grafana │ │ ↳ Tempo datasource │ └─────────────────────┘ ``` ### New files (12) - `docs/reference/services/tempo.md` — reference doc - `docs/changelog.d/feature-otel-tracing.feature.md` - `argocd/apps/tempo.yaml` + `argocd/manifests/tempo/` (6 files) - `argocd/apps/alloy-tracing-ringtail.yaml` + `argocd/manifests/alloy-tracing-ringtail/` (4 files) ### Modified files (6) - `argocd/manifests/grafana/datasources.yaml` — Tempo datasource + Loki derivedFields - `argocd/manifests/prometheus/prometheus.yml` — Tempo scrape target - `service-versions.yaml` — tempo + alloy-tracing-ringtail entries - `docs/reference/services/grafana.md` — Tempo in datasources table - `docs/reference/reference.md` — Tempo in services index - `docs/reference/operations/observability.md` — Tempo in components list ## Deployment and Testing - [ ] Sync `apps` app to pick up new Application definitions - [ ] `argocd app set tempo --revision feature/otel-tracing && argocd app sync tempo` - [ ] Verify Tempo pod: `kubectl --context=minikube-indri get pods -n monitoring -l app=tempo` - [ ] Verify Tempo ready: port-forward 3200 and `curl localhost:3200/ready` - [ ] Verify Tailscale ingresses: `kubectl --context=minikube-indri get ingress -n monitoring` - [ ] `argocd app set alloy-tracing-ringtail --revision feature/otel-tracing && argocd app sync alloy-tracing-ringtail` - [ ] Check Beyla discovery in alloy-tracing logs on ringtail - [ ] Sync grafana-config for updated datasources - [ ] Sync prometheus for updated scrape config - [ ] Test Grafana Tempo datasource connection - [ ] Generate test traffic and search traces in Grafana Explore → Tempo - [ ] After merge: reset all ArgoCD app revisions back to main Reviewed-on: https://forge.eblu.me/eblume/blumeops/pulls/286
2026-03-05 10:51:07 -08:00
Metrics, logs, traces, and dashboards for BlumeOps infrastructure.
## Components
- [[prometheus]] - Metrics storage and querying
- [[loki]] - Log aggregation
Add OpenTelemetry distributed tracing (Tempo + Beyla eBPF) (#286) ## Summary Adds the third observability pillar — **distributed tracing** — alongside existing metrics (Prometheus) and logs (Loki). - **Grafana Tempo 2.10.1** on minikube-indri for trace storage with 7d retention, OTLP receivers, and `metrics_generator` that remote-writes span-metrics (RED) to Prometheus - **Beyla eBPF auto-instrumentation** via a privileged Alloy DaemonSet on ringtail — instruments HTTP services (Frigate, ntfy, Ollama, Immich) without code changes - **Grafana integration** — Tempo datasource with trace↔log and trace↔metrics correlation, plus Loki derivedFields for trace ID linking - **Prometheus** scrapes Tempo operational metrics ### Architecture ``` ringtail (k3s) indri (minikube) ┌──────────────────────┐ ┌─────────────────────┐ │ Alloy+Beyla (eBPF) │──OTLP HTTP────────→ │ Tempo │ │ ↳ Frigate, ntfy, │ via tailnet │ ↳ trace storage │ │ Ollama, Immich │ │ ↳ RED → Prometheus │ └──────────────────────┘ │ │ │ Grafana │ │ ↳ Tempo datasource │ └─────────────────────┘ ``` ### New files (12) - `docs/reference/services/tempo.md` — reference doc - `docs/changelog.d/feature-otel-tracing.feature.md` - `argocd/apps/tempo.yaml` + `argocd/manifests/tempo/` (6 files) - `argocd/apps/alloy-tracing-ringtail.yaml` + `argocd/manifests/alloy-tracing-ringtail/` (4 files) ### Modified files (6) - `argocd/manifests/grafana/datasources.yaml` — Tempo datasource + Loki derivedFields - `argocd/manifests/prometheus/prometheus.yml` — Tempo scrape target - `service-versions.yaml` — tempo + alloy-tracing-ringtail entries - `docs/reference/services/grafana.md` — Tempo in datasources table - `docs/reference/reference.md` — Tempo in services index - `docs/reference/operations/observability.md` — Tempo in components list ## Deployment and Testing - [ ] Sync `apps` app to pick up new Application definitions - [ ] `argocd app set tempo --revision feature/otel-tracing && argocd app sync tempo` - [ ] Verify Tempo pod: `kubectl --context=minikube-indri get pods -n monitoring -l app=tempo` - [ ] Verify Tempo ready: port-forward 3200 and `curl localhost:3200/ready` - [ ] Verify Tailscale ingresses: `kubectl --context=minikube-indri get ingress -n monitoring` - [ ] `argocd app set alloy-tracing-ringtail --revision feature/otel-tracing && argocd app sync alloy-tracing-ringtail` - [ ] Check Beyla discovery in alloy-tracing logs on ringtail - [ ] Sync grafana-config for updated datasources - [ ] Sync prometheus for updated scrape config - [ ] Test Grafana Tempo datasource connection - [ ] Generate test traffic and search traces in Grafana Explore → Tempo - [ ] After merge: reset all ArgoCD app revisions back to main Reviewed-on: https://forge.eblu.me/eblume/blumeops/pulls/286
2026-03-05 10:51:07 -08:00
- [[tempo]] - Distributed tracing
- [[alloy|Alloy]] - Metrics, log, and trace collection
- [[grafana]] - Dashboards and visualization
## Future: Continuous Profiling (Pyroscope)
Full implementation on branch `preserve/pyroscope-profiling/pr-313` (PR #313, closed). Includes Pyroscope server (StatefulSet on ringtail), Alloy profiling DaemonSet (`pyroscope.ebpf`), Grafana datasource with traces-to-profiles linking, Nix container build with embedded frontend, and documentation.
**Blocked on ringtail kernel sysctl settings.** The `pyroscope.ebpf` Alloy component requires:
- `kernel.kptr_restrict = 0` (currently `1` — kallsyms addresses are zeroed)
- `kernel.perf_event_paranoid ≤ 1` (currently `2` — eBPF perf events restricted)
These must be set in ringtail's NixOS configuration (`boot.kernel.sysctl`). Once applied, the branch can be rebased onto main and deployed.
## Future: Frontend Monitoring (RUM)
Grafana Faro is a Real User Monitoring SDK that captures page loads, web vitals, errors, and network timings from the browser, feeding into Loki (logs) and Tempo (traces) via Alloy's `faro.receiver` component. This would add an "outside-in" view of service health from the user's perspective.
**Not currently deployed.** RUM captures browsing behavior from visitors to public services, creating a data retention liability. Would require careful sanitization before deploying.
## Alerting
- [[deploy-infra-alerting]] - Alerting pipeline (Grafana Unified Alerting → ntfy)
- [[runbook-service-probe-failure]] - Service health check failure runbook
- [[runbook-postgres-unhealthy]] - PostgreSQL cluster health runbook
- [[runbook-pod-not-ready]] - Pod not ready runbook
- [[runbook-textfile-stale]] - Metrics textfile freshness runbook
- [[runbook-frigate-camera-down]] - Frigate camera health runbook
- [[runbook-argocd-out-of-sync]] - ArgoCD sync status runbook