From c6aa762a6ccd7bd7994ac9255cecbd0807aa5714 Mon Sep 17 00:00:00 2001 From: Thomas Richter Date: Tue, 3 Feb 2026 22:07:43 +0100 Subject: [PATCH] docs(08-01): complete TaskPlanner metrics and ServiceMonitor plan Tasks completed: 2/2 - Add prom-client and create /metrics endpoint - Add ServiceMonitor to Helm chart SUMMARY: .planning/phases/08-observability-stack/08-01-SUMMARY.md Co-Authored-By: Claude Opus 4.5 --- .planning/STATE.md | 27 +++-- .../08-observability-stack/08-01-SUMMARY.md | 102 ++++++++++++++++++ 2 files changed, 118 insertions(+), 11 deletions(-) create mode 100644 .planning/phases/08-observability-stack/08-01-SUMMARY.md diff --git a/.planning/STATE.md b/.planning/STATE.md index f265dd4..5bed15b 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -5,16 +5,16 @@ See: .planning/PROJECT.md (updated 2026-02-01) **Core value:** Capture and find anything from any device — especially laptop. If cross-device capture with images doesn't work, nothing else matters. -**Current focus:** v2.0 Production Operations — Phase 8 (Logging) +**Current focus:** v2.0 Production Operations — Phase 8 (Observability Stack) ## Current Position -Phase: 7 of 9 (GitOps Foundation) - COMPLETE -Plan: 2 of 2 in current phase - COMPLETE -Status: Phase complete, ready for Phase 8 -Last activity: 2026-02-03 — Completed 07-02-PLAN.md (GitOps Verification) +Phase: 8 of 9 (Observability Stack) - IN PROGRESS +Plan: 1 of 3 in current phase - COMPLETE +Status: In progress +Last activity: 2026-02-03 — Completed 08-01-PLAN.md (TaskPlanner /metrics and ServiceMonitor) -Progress: [████████████████████░░░░░░░░░░] 80% (20/25 plans complete) +Progress: [█████████████████████░░░░░░░░░] 84% (21/25 plans complete) ## Performance Metrics @@ -26,8 +26,8 @@ Progress: [████████████████████░░░ - Requirements satisfied: 31/31 **v2.0 Progress:** -- Plans completed: 2/7 -- Total execution time: 26 min +- Plans completed: 3/7 +- Total execution time: 30 min **By Phase (v1.0):** @@ -45,6 +45,7 @@ Progress: [████████████████████░░░ | Phase | Plans | Total | Avg/Plan | |-------|-------|-------|----------| | 07-gitops-foundation | 2/2 | 26 min | 13 min | +| 08-observability-stack | 1/3 | 4 min | 4 min | ## Accumulated Context @@ -67,6 +68,10 @@ For v2.0, key decisions from research: - GitOps verification pattern: Use pod annotation changes for non-destructive sync testing - ArgoCD health "Progressing" is display issue, not functional problem +**From Phase 8-01:** +- Use prom-client default metrics only (no custom metrics for initial setup) +- ServiceMonitor enabled by default in values.yaml + ### Pending Todos - Deploy Gitea Actions runner for automatic CI builds @@ -78,10 +83,10 @@ For v2.0, key decisions from research: ## Session Continuity -Last session: 2026-02-03 14:40 UTC -Stopped at: Completed 07-02-PLAN.md (Phase 7 complete) +Last session: 2026-02-03 21:08 UTC +Stopped at: Completed 08-01-PLAN.md Resume file: None --- *State initialized: 2026-01-29* -*Last updated: 2026-02-03 — Phase 7 GitOps Foundation complete* +*Last updated: 2026-02-03 — Completed 08-01-PLAN.md (TaskPlanner /metrics and ServiceMonitor)* diff --git a/.planning/phases/08-observability-stack/08-01-SUMMARY.md b/.planning/phases/08-observability-stack/08-01-SUMMARY.md new file mode 100644 index 0000000..425d79b --- /dev/null +++ b/.planning/phases/08-observability-stack/08-01-SUMMARY.md @@ -0,0 +1,102 @@ +--- +phase: 08-observability-stack +plan: 01 +subsystem: infra +tags: [prometheus, prom-client, servicemonitor, metrics, kubernetes, helm] + +# Dependency graph +requires: + - phase: 06-deployment + provides: Helm chart structure and Kubernetes deployment +provides: + - Prometheus-format /metrics endpoint + - ServiceMonitor for Prometheus Operator discovery + - Default Node.js process metrics (CPU, memory, heap, event loop) +affects: [08-02, 08-03, observability] + +# Tech tracking +tech-stack: + added: [prom-client] + patterns: [metrics-endpoint, servicemonitor-discovery] + +key-files: + created: + - src/lib/server/metrics.ts + - src/routes/metrics/+server.ts + - helm/taskplaner/templates/servicemonitor.yaml + modified: + - package.json + - helm/taskplaner/values.yaml + +key-decisions: + - "Use prom-client default metrics only (no custom metrics for initial setup)" + - "ServiceMonitor enabled by default in values.yaml" + +patterns-established: + - "Metrics endpoint: server-side only route returning registry.metrics() with correct Content-Type" + - "ServiceMonitor: conditional on metrics.enabled, uses selectorLabels for pod discovery" + +# Metrics +duration: 4min +completed: 2026-02-03 +--- + +# Phase 8 Plan 1: TaskPlanner /metrics endpoint and ServiceMonitor Summary + +**Prometheus /metrics endpoint with prom-client and ServiceMonitor for Prometheus Operator scraping** + +## Performance + +- **Duration:** 4 min +- **Started:** 2026-02-03T21:04:03Z +- **Completed:** 2026-02-03T21:08:00Z +- **Tasks:** 2 +- **Files modified:** 5 + +## Accomplishments + +- /metrics endpoint returns Prometheus-format text including process_cpu_seconds_total, nodejs_heap_size_total_bytes +- ServiceMonitor template renders correctly with selector matching TaskPlanner service +- Metrics enabled by default in Helm chart (metrics.enabled: true) + +## Task Commits + +Each task was committed atomically: + +1. **Task 1: Add prom-client and create /metrics endpoint** - `f60aad2` (feat) +2. **Task 2: Add ServiceMonitor to Helm chart** - `f2a2893` (feat) + +## Files Created/Modified + +- `src/lib/server/metrics.ts` - Prometheus registry with default Node.js metrics +- `src/routes/metrics/+server.ts` - GET handler returning metrics in Prometheus format +- `helm/taskplaner/templates/servicemonitor.yaml` - ServiceMonitor for Prometheus Operator +- `helm/taskplaner/values.yaml` - Added metrics.enabled and metrics.interval settings +- `package.json` - Added prom-client dependency + +## Decisions Made + +- Used prom-client default metrics only (CPU, memory, heap, event loop) - no custom application metrics needed for initial observability setup +- ServiceMonitor enabled by default since metrics endpoint is always available + +## Deviations from Plan + +None - plan executed exactly as written. + +## Issues Encountered + +None - all verification checks passed. + +## User Setup Required + +None - no external service configuration required. The ServiceMonitor will be automatically discovered by Prometheus Operator once deployed via ArgoCD. + +## Next Phase Readiness + +- /metrics endpoint ready for Prometheus scraping +- ServiceMonitor will be deployed with next ArgoCD sync +- Ready for Phase 8-02: Promtail to Alloy migration + +--- +*Phase: 08-observability-stack* +*Completed: 2026-02-03*