Implement Prometheus metrics endpoint (P2.16)
Add comprehensive metrics collection for production monitoring: - src/lib/metrics.ts: prom-client based metrics library with custom counters, gauges, and histograms for Garmin sync, email, and decision engine - GET /api/metrics: Prometheus-format endpoint for scraping - Integration into garmin-sync cron: sync duration, success/failure counts, active users gauge - Integration into email.ts: daily and warning email counters - Integration into decision-engine.ts: decision type counters Custom metrics implemented: - phaseflow_garmin_sync_total (counter with status label) - phaseflow_garmin_sync_duration_seconds (histogram) - phaseflow_email_sent_total (counter with type label) - phaseflow_decision_engine_calls_total (counter with decision label) - phaseflow_active_users (gauge) 33 new tests (18 library + 15 route), bringing total to 586 tests. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
@@ -4,7 +4,7 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
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## Current State Summary
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### Overall Status: 553 tests passing across 31 test files
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### Overall Status: 586 tests passing across 33 test files
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### Library Implementation
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| File | Status | Gap Analysis |
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@@ -20,13 +20,13 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
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| `auth-middleware.ts` | **COMPLETE** | 6 tests covering `withAuth()` wrapper for API route protection |
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| `middleware.ts` (Next.js) | **COMPLETE** | 12 tests covering page protection, redirects to login |
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| `logger.ts` | **COMPLETE** | 16 tests covering JSON output, log levels, error stack traces, child loggers |
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| `metrics.ts` | **NOT IMPLEMENTED** | P2.16 - Prometheus metrics collection |
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| `metrics.ts` | **COMPLETE** | 33 tests covering metrics collection, counters, gauges, histograms, Prometheus format |
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### Infrastructure Gaps (from specs/ - pending implementation)
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| Gap | Spec Reference | Task | Priority |
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|-----|----------------|------|----------|
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| Health Check Endpoint | specs/observability.md | P2.15 | **COMPLETE** |
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| Prometheus Metrics | specs/observability.md | P2.16 | Medium |
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| Prometheus Metrics | specs/observability.md | P2.16 | **COMPLETE** |
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| Structured Logging (pino) | specs/observability.md | P2.17 | **COMPLETE** |
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| OIDC Authentication | specs/authentication.md | P2.18 | Medium |
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| Token Expiration Warnings | specs/email.md | P3.9 | **COMPLETE** |
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@@ -50,7 +50,7 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
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| POST /api/cron/notifications | **COMPLETE** | Sends daily emails with timezone matching, DailyLog handling (20 tests) |
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| GET /api/history | **COMPLETE** | Paginated historical daily logs with date filtering (19 tests) |
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| GET /api/health | **COMPLETE** | Health check for deployment monitoring (14 tests) |
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| GET /metrics | **NOT IMPLEMENTED** | Prometheus metrics endpoint (P2.16) |
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| GET /metrics | **COMPLETE** | 33 tests (18 lib + 15 route) |
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### Pages (7 total)
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| Page | Status | Notes |
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@@ -82,6 +82,7 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
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| `src/lib/pocketbase.test.ts` | **EXISTS** - 9 tests (auth helpers, cookie loading) |
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| `src/lib/auth-middleware.test.ts` | **EXISTS** - 6 tests (withAuth wrapper, error handling) |
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| `src/lib/logger.test.ts` | **EXISTS** - 16 tests (JSON format, log levels, error serialization, child loggers) |
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| `src/lib/metrics.test.ts` | **EXISTS** - 18 tests (metrics collection, counters, gauges, histograms, Prometheus format) |
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| `src/middleware.test.ts` | **EXISTS** - 12 tests (page protection, public routes, static assets) |
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| `src/app/api/user/route.test.ts` | **EXISTS** - 21 tests (GET/PATCH profile, auth, validation, security) |
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| `src/app/api/cycle/period/route.test.ts` | **EXISTS** - 8 tests (POST period, auth, validation, date checks) |
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@@ -104,6 +105,7 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
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| `src/app/api/history/route.test.ts` | **EXISTS** - 19 tests (pagination, date filtering, auth, validation) |
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| `src/app/api/health/route.test.ts` | **EXISTS** - 14 tests (healthy/unhealthy states, PocketBase connectivity, error handling) |
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| `src/app/history/page.test.tsx` | **EXISTS** - 26 tests (rendering, data loading, pagination, date filtering, styling) |
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| `src/app/api/metrics/route.test.ts` | **EXISTS** - 15 tests (Prometheus format validation, metric types, route handling) |
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| `src/components/calendar/month-view.test.tsx` | **EXISTS** - 21 tests (calendar grid, phase colors, navigation, legend) |
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| `src/app/calendar/page.test.tsx` | **EXISTS** - 23 tests (rendering, navigation, ICS subscription, token regeneration) |
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| `src/app/settings/page.test.tsx` | **EXISTS** - 24+ tests (form rendering, validation, submission) |
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@@ -491,20 +493,24 @@ Full feature set for production use.
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- Basic app startup complete
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- **Why:** Required for Nomad health checks, load balancer probes, and uptime monitoring (per specs/observability.md)
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### P2.16: Prometheus Metrics Endpoint
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- [ ] GET /metrics for monitoring
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- **Current State:** Endpoint and metrics library do not exist
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### P2.16: Prometheus Metrics Endpoint ✅ COMPLETE
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- [x] GET /metrics for monitoring
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- **Current State:** Fully implemented with prom-client
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- **Files:**
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- `src/app/api/metrics/route.ts` - Returns Prometheus-format metrics
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- `src/lib/metrics.ts` - Metrics collection with prom-client
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- `src/app/api/metrics/route.ts` - Returns Prometheus-format metrics (15 tests)
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- `src/lib/metrics.ts` - Metrics collection with prom-client (18 tests)
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- **Tests:**
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- `src/app/api/metrics/route.test.ts` - Tests for valid Prometheus format output
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- **Metrics:**
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- Standard Node.js metrics (heap, eventloop lag, http requests)
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- Custom: `phaseflow_garmin_sync_total`, `phaseflow_email_sent_total`, `phaseflow_decision_engine_calls_total`, `phaseflow_active_users`
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- `src/lib/metrics.test.ts` - 18 tests covering metrics collection, counters, gauges, histograms, Prometheus format
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- `src/app/api/metrics/route.test.ts` - 15 tests for Prometheus format output, metric types, route handling
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- **Metrics Implemented:**
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- Custom counters: `phaseflow_garmin_sync_total`, `phaseflow_email_sent_total`, `phaseflow_decision_engine_calls_total`
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- Custom gauge: `phaseflow_active_users`
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- Custom histogram: `phaseflow_garmin_sync_duration_seconds`
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- **Integrations:**
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- garmin-sync route: garminSyncTotal, garminSyncDuration, activeUsersGauge
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- email.ts: emailSentTotal (daily and warning types)
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- decision-engine.ts: decisionEngineCallsTotal
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- **Why:** Required for Prometheus scraping and production monitoring (per specs/observability.md)
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- **Depends On:** None
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### P2.17: Structured Logging with Pino ✅ COMPLETE
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- [x] Create pino-based logger with JSON output
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- **Files:**
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@@ -792,7 +798,6 @@ P4.* UX Polish ────────> After core functionality complete
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|----------|------|--------|-------|
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| Medium | P2.13 Plan Page | Medium | Placeholder exists, needs content |
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| Medium | P2.14 MiniCalendar | Small | Can reuse DayCell, ~70% remaining |
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| Medium | P2.16 Metrics | Medium | Production monitoring |
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| Medium | P2.18 OIDC Auth | Large | Production auth requirement |
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| Medium | P3.11 Component Tests | Medium | 6 components need tests |
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| Low | P3.7 Error Handling | Small | Polish |
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@@ -807,7 +812,6 @@ P4.* UX Polish ────────> After core functionality complete
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| P0.2 | P0.1 | P0.4, P1.1-P1.5, P2.2-P2.3, P2.7-P2.8 |
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| P0.3 | - | P1.4, P1.5 |
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| P0.4 | P0.1, P0.2 | P1.7, P2.9, P2.10, P2.13 |
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| P2.16 | - | - |
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| P2.18 | P1.6 | - |
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| P3.9 | P2.4 | - |
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| P3.11 | - | - |
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@@ -828,6 +832,7 @@ P4.* UX Polish ────────> After core functionality complete
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- [x] **auth-middleware.ts** - Complete with 6 tests (`withAuth()` wrapper)
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- [x] **middleware.ts** - Complete with 12 tests (Next.js page protection)
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- [x] **logger.ts** - Complete with 16 tests (JSON output, log levels, error serialization, child loggers) (P2.17)
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- [x] **metrics.ts** - Complete with 18 tests (metrics collection, counters, gauges, histograms, Prometheus format) (P2.16)
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### Components
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- [x] **DecisionCard** - Displays decision status, icon, and reason
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@@ -837,7 +842,7 @@ P4.* UX Polish ────────> After core functionality complete
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- [x] **DayCell** - Phase-colored calendar day cell with click handler
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- [x] **MonthView** - Calendar grid with DayCell integration, navigation controls (prev/next month, Today button), phase legend, 21 tests
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### API Routes (16 complete, 1 not implemented)
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### API Routes (17 complete)
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- [x] **GET /api/user** - Returns authenticated user profile, 4 tests (P0.4)
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- [x] **PATCH /api/user** - Updates user profile (cycleLength, notificationTime, timezone), 17 tests (P1.1)
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- [x] **POST /api/cycle/period** - Logs period start date, updates user, creates PeriodLog, 8 tests (P1.2)
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@@ -854,6 +859,7 @@ P4.* UX Polish ────────> After core functionality complete
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- [x] **POST /api/calendar/regenerate-token** - Generates new 32-char calendar token, returns URL, 9 tests (P2.7)
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- [x] **GET /api/history** - Paginated historical daily logs with date filtering, validation, 19 tests (P2.8)
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- [x] **GET /api/health** - Health check endpoint with PocketBase connectivity check, 14 tests (P2.15)
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- [x] **GET /metrics** - Prometheus metrics endpoint with counters, gauges, histograms, 33 tests (18 lib + 15 route) (P2.16)
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### Pages (6 complete, 1 placeholder)
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- [x] **Login Page** - Email/password form with PocketBase auth, error handling, loading states, redirect, 14 tests (P1.6)
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@@ -21,6 +21,7 @@
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"node-cron": "^4.2.1",
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"pino": "^10.1.1",
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"pocketbase": "^0.26.5",
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"prom-client": "^15.1.3",
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"react": "19.2.3",
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"react-dom": "19.2.3",
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"resend": "^6.7.0",
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46
pnpm-lock.yaml
generated
46
pnpm-lock.yaml
generated
@@ -16,7 +16,7 @@ importers:
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version: 2.1.1
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drizzle-orm:
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specifier: ^0.45.1
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version: 0.45.1
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version: 0.45.1(@opentelemetry/api@1.9.0)
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ics:
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specifier: ^3.8.1
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version: 3.8.1
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@@ -25,7 +25,7 @@ importers:
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version: 0.562.0(react@19.2.3)
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next:
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specifier: 16.1.1
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version: 16.1.1(@babel/core@7.28.5)(react-dom@19.2.3(react@19.2.3))(react@19.2.3)
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node-cron:
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specifier: ^4.2.1
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version: 4.2.1
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@@ -35,6 +35,9 @@ importers:
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pocketbase:
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specifier: ^0.26.5
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version: 0.26.5
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prom-client:
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specifier: ^15.1.3
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version: 15.1.3
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react:
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specifier: 19.2.3
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version: 19.2.3
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@@ -98,7 +101,7 @@ importers:
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version: 5.9.3
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vitest:
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specifier: ^4.0.16
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version: 4.0.16(@types/node@20.19.27)(jiti@2.6.1)(jsdom@27.4.0)(lightningcss@1.30.2)
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packages:
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@@ -964,6 +967,10 @@ packages:
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cpu: [x64]
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os: [win32]
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'@opentelemetry/api@1.9.0':
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engines: {node: '>=8.0.0'}
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@@ -1318,6 +1325,9 @@ packages:
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bidi-js@1.0.3:
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bintrees@1.0.2:
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browserslist@4.28.1:
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resolution: {integrity: sha512-ZC5Bd0LgJXgwGqUknZY/vkUQ04r8NXnJZ3yYi4vDmSiZmC/pdSN0NbNRPxZpbtO4uAfDUAFffO8IZoM3Gj8IkA==}
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engines: {node: ^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12 || >=13.7}
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@@ -1786,6 +1796,10 @@ packages:
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process-warning@5.0.0:
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prom-client@15.1.3:
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resolution: {integrity: sha512-6ZiOBfCywsD4k1BN9IX0uZhF+tJkV8q8llP64G5Hajs4JOeVLPCwpPVcpXy3BwYiUGgyJzsJJQeOIv7+hDSq8g==}
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engines: {node: ^16 || ^18 || >=20}
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property-expr@2.0.6:
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@@ -1931,6 +1945,9 @@ packages:
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resolution: {integrity: sha512-g9ljZiwki/LfxmQADO3dEY1CbpmXT5Hm2fJ+QaGKwSXUylMybePR7/67YW7jOrrvjEgL1Fmz5kzyAjWVWLlucg==}
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engines: {node: '>=6'}
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tdigest@0.1.2:
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thread-stream@4.0.0:
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resolution: {integrity: sha512-4iMVL6HAINXWf1ZKZjIPcz5wYaOdPhtO8ATvZ+Xqp3BTdaqtAwQkNmKORqcIo5YkQqGXq5cwfswDwMqqQNrpJA==}
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engines: {node: '>=20'}
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@@ -2702,6 +2719,8 @@ snapshots:
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'@next/swc-win32-x64-msvc@16.1.1':
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optional: true
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'@opentelemetry/api@1.9.0': {}
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'@pinojs/redact@0.4.0': {}
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'@rolldown/pluginutils@1.0.0-beta.53': {}
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@@ -3005,6 +3024,8 @@ snapshots:
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dependencies:
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require-from-string: 2.0.2
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bintrees@1.0.2: {}
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browserslist@4.28.1:
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dependencies:
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baseline-browser-mapping: 2.9.14
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@@ -3073,7 +3094,9 @@ snapshots:
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transitivePeerDependencies:
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- supports-color
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drizzle-orm@0.45.1: {}
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drizzle-orm@0.45.1(@opentelemetry/api@1.9.0):
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optionalDependencies:
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'@opentelemetry/api': 1.9.0
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electron-to-chromium@1.5.267: {}
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@@ -3340,7 +3363,7 @@ snapshots:
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nanoid@3.3.11: {}
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next@16.1.1(@babel/core@7.28.5)(react-dom@19.2.3(react@19.2.3))(react@19.2.3):
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next@16.1.1(@babel/core@7.28.5)(@opentelemetry/api@1.9.0)(react-dom@19.2.3(react@19.2.3))(react@19.2.3):
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dependencies:
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'@next/env': 16.1.1
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'@swc/helpers': 0.5.15
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@@ -3359,6 +3382,7 @@ snapshots:
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'@next/swc-linux-x64-musl': 16.1.1
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'@next/swc-win32-arm64-msvc': 16.1.1
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'@next/swc-win32-x64-msvc': 16.1.1
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'@opentelemetry/api': 1.9.0
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sharp: 0.34.5
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transitivePeerDependencies:
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- '@babel/core'
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@@ -3424,6 +3448,11 @@ snapshots:
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process-warning@5.0.0: {}
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prom-client@15.1.3:
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dependencies:
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'@opentelemetry/api': 1.9.0
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tdigest: 0.1.2
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property-expr@2.0.6: {}
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punycode@2.3.1: {}
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@@ -3584,6 +3613,10 @@ snapshots:
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tapable@2.3.0: {}
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tdigest@0.1.2:
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dependencies:
|
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bintrees: 1.0.2
|
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thread-stream@4.0.0:
|
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dependencies:
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real-require: 0.2.0
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@@ -3649,7 +3682,7 @@ snapshots:
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jiti: 2.6.1
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lightningcss: 1.30.2
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vitest@4.0.16(@types/node@20.19.27)(jiti@2.6.1)(jsdom@27.4.0)(lightningcss@1.30.2):
|
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vitest@4.0.16(@opentelemetry/api@1.9.0)(@types/node@20.19.27)(jiti@2.6.1)(jsdom@27.4.0)(lightningcss@1.30.2):
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dependencies:
|
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'@vitest/expect': 4.0.16
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'@vitest/mocker': 4.0.16(vite@7.3.1(@types/node@20.19.27)(jiti@2.6.1)(lightningcss@1.30.2))
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@@ -3672,6 +3705,7 @@ snapshots:
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vite: 7.3.1(@types/node@20.19.27)(jiti@2.6.1)(lightningcss@1.30.2)
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why-is-node-running: 2.3.0
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optionalDependencies:
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'@opentelemetry/api': 1.9.0
|
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'@types/node': 20.19.27
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jsdom: 27.4.0
|
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transitivePeerDependencies:
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@@ -13,6 +13,11 @@ import {
|
||||
fetchIntensityMinutes,
|
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isTokenExpired,
|
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} from "@/lib/garmin";
|
||||
import {
|
||||
activeUsersGauge,
|
||||
garminSyncDuration,
|
||||
garminSyncTotal,
|
||||
} from "@/lib/metrics";
|
||||
import { createPocketBaseClient } from "@/lib/pocketbase";
|
||||
import type { GarminTokens, User } from "@/types";
|
||||
|
||||
@@ -34,6 +39,8 @@ export async function POST(request: Request) {
|
||||
return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
|
||||
}
|
||||
|
||||
const syncStartTime = Date.now();
|
||||
|
||||
const result: SyncResult = {
|
||||
success: true,
|
||||
usersProcessed: 0,
|
||||
@@ -129,10 +136,17 @@ export async function POST(request: Request) {
|
||||
});
|
||||
|
||||
result.usersProcessed++;
|
||||
garminSyncTotal.inc({ status: "success" });
|
||||
} catch {
|
||||
result.errors++;
|
||||
garminSyncTotal.inc({ status: "failure" });
|
||||
}
|
||||
}
|
||||
|
||||
// Record sync duration and active users
|
||||
const syncDurationSeconds = (Date.now() - syncStartTime) / 1000;
|
||||
garminSyncDuration.observe(syncDurationSeconds);
|
||||
activeUsersGauge.set(result.usersProcessed);
|
||||
|
||||
return NextResponse.json(result);
|
||||
}
|
||||
|
||||
171
src/app/api/metrics/route.test.ts
Normal file
171
src/app/api/metrics/route.test.ts
Normal file
@@ -0,0 +1,171 @@
|
||||
// ABOUTME: Tests for Prometheus metrics endpoint used for production monitoring.
|
||||
// ABOUTME: Validates metrics format, content type, and custom metric inclusion.
|
||||
|
||||
import * as promClient from "prom-client";
|
||||
import { beforeEach, describe, expect, it, vi } from "vitest";
|
||||
|
||||
describe("GET /api/metrics", () => {
|
||||
beforeEach(async () => {
|
||||
// Clear the registry before each test to avoid metric conflicts
|
||||
promClient.register.clear();
|
||||
vi.resetModules();
|
||||
});
|
||||
|
||||
describe("response format", () => {
|
||||
it("returns 200 status", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
|
||||
expect(response.status).toBe(200);
|
||||
});
|
||||
|
||||
it("returns Prometheus content type", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
|
||||
expect(response.headers.get("Content-Type")).toBe(
|
||||
"text/plain; version=0.0.4; charset=utf-8",
|
||||
);
|
||||
});
|
||||
|
||||
it("returns text body with metrics", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toBeDefined();
|
||||
expect(body.length).toBeGreaterThan(0);
|
||||
});
|
||||
});
|
||||
|
||||
describe("Node.js default metrics", () => {
|
||||
it("includes nodejs heap metrics", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("nodejs_");
|
||||
});
|
||||
|
||||
it("includes process metrics", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("process_");
|
||||
});
|
||||
});
|
||||
|
||||
describe("custom application metrics", () => {
|
||||
it("includes phaseflow_garmin_sync_total metric definition", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("# TYPE phaseflow_garmin_sync_total counter");
|
||||
expect(body).toContain("# HELP phaseflow_garmin_sync_total");
|
||||
});
|
||||
|
||||
it("includes phaseflow_garmin_sync_duration_seconds metric definition", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain(
|
||||
"# TYPE phaseflow_garmin_sync_duration_seconds histogram",
|
||||
);
|
||||
expect(body).toContain("# HELP phaseflow_garmin_sync_duration_seconds");
|
||||
});
|
||||
|
||||
it("includes phaseflow_email_sent_total metric definition", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("# TYPE phaseflow_email_sent_total counter");
|
||||
expect(body).toContain("# HELP phaseflow_email_sent_total");
|
||||
});
|
||||
|
||||
it("includes phaseflow_decision_engine_calls_total metric definition", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain(
|
||||
"# TYPE phaseflow_decision_engine_calls_total counter",
|
||||
);
|
||||
expect(body).toContain("# HELP phaseflow_decision_engine_calls_total");
|
||||
});
|
||||
|
||||
it("includes phaseflow_active_users metric definition", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("# TYPE phaseflow_active_users gauge");
|
||||
expect(body).toContain("# HELP phaseflow_active_users");
|
||||
});
|
||||
});
|
||||
|
||||
describe("metric values", () => {
|
||||
it("incremented garmin sync total is reflected in metrics output", async () => {
|
||||
const { garminSyncTotal } = await import("@/lib/metrics");
|
||||
garminSyncTotal.inc({ status: "success" });
|
||||
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain('phaseflow_garmin_sync_total{status="success"} 1');
|
||||
});
|
||||
|
||||
it("incremented email sent total is reflected in metrics output", async () => {
|
||||
const { emailSentTotal } = await import("@/lib/metrics");
|
||||
emailSentTotal.inc({ type: "daily" });
|
||||
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain('phaseflow_email_sent_total{type="daily"} 1');
|
||||
});
|
||||
|
||||
it("set active users gauge is reflected in metrics output", async () => {
|
||||
const { activeUsersGauge } = await import("@/lib/metrics");
|
||||
activeUsersGauge.set(25);
|
||||
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
expect(body).toContain("phaseflow_active_users 25");
|
||||
});
|
||||
});
|
||||
|
||||
describe("Prometheus format validation", () => {
|
||||
it("produces valid Prometheus text format with TYPE comments", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
// Each metric should have TYPE and HELP lines
|
||||
const lines = body.split("\n");
|
||||
const typeLines = lines.filter((line) => line.startsWith("# TYPE"));
|
||||
const helpLines = lines.filter((line) => line.startsWith("# HELP"));
|
||||
|
||||
// Should have type and help for our custom metrics
|
||||
expect(typeLines.length).toBeGreaterThanOrEqual(5);
|
||||
expect(helpLines.length).toBeGreaterThanOrEqual(5);
|
||||
});
|
||||
|
||||
it("metric names follow Prometheus naming convention", async () => {
|
||||
const { GET } = await import("./route");
|
||||
const response = await GET();
|
||||
const body = await response.text();
|
||||
|
||||
// Prometheus metric names should be snake_case with optional prefix
|
||||
// Our custom metrics follow phaseflow_* pattern
|
||||
expect(body).toMatch(/phaseflow_[a-z_]+/);
|
||||
});
|
||||
});
|
||||
});
|
||||
16
src/app/api/metrics/route.ts
Normal file
16
src/app/api/metrics/route.ts
Normal file
@@ -0,0 +1,16 @@
|
||||
// ABOUTME: Prometheus metrics endpoint for production monitoring and scraping.
|
||||
// ABOUTME: Returns application metrics in Prometheus text format.
|
||||
|
||||
import { NextResponse } from "next/server";
|
||||
import { metricsRegistry } from "@/lib/metrics";
|
||||
|
||||
export async function GET(): Promise<NextResponse> {
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
|
||||
return new NextResponse(metrics, {
|
||||
status: 200,
|
||||
headers: {
|
||||
"Content-Type": metricsRegistry.contentType,
|
||||
},
|
||||
});
|
||||
}
|
||||
@@ -1,5 +1,6 @@
|
||||
// ABOUTME: Training decision engine based on biometric and cycle data.
|
||||
// ABOUTME: Implements priority-based rules for daily training recommendations.
|
||||
import { decisionEngineCallsTotal } from "@/lib/metrics";
|
||||
import type { DailyData, Decision, OverrideType } from "@/types";
|
||||
|
||||
// Override priority order - checked before algorithmic rules
|
||||
@@ -80,14 +81,18 @@ export function getDecisionWithOverrides(
|
||||
// Check overrides first, in priority order: flare > stress > sleep > pms
|
||||
for (const override of OVERRIDE_PRIORITY) {
|
||||
if (overrides.includes(override)) {
|
||||
return {
|
||||
const decision: Decision = {
|
||||
status: "REST",
|
||||
reason: OVERRIDE_REASONS[override],
|
||||
icon: "🛑",
|
||||
};
|
||||
decisionEngineCallsTotal.inc({ decision: decision.status });
|
||||
return decision;
|
||||
}
|
||||
}
|
||||
|
||||
// No active overrides - fall through to algorithmic rules
|
||||
return getTrainingDecision(data);
|
||||
const decision = getTrainingDecision(data);
|
||||
decisionEngineCallsTotal.inc({ decision: decision.status });
|
||||
return decision;
|
||||
}
|
||||
|
||||
@@ -2,6 +2,8 @@
|
||||
// ABOUTME: Sends daily training notifications and period confirmation emails.
|
||||
import { Resend } from "resend";
|
||||
|
||||
import { emailSentTotal } from "@/lib/metrics";
|
||||
|
||||
const resend = new Resend(process.env.RESEND_API_KEY);
|
||||
|
||||
const EMAIL_FROM = process.env.EMAIL_FROM || "phaseflow@example.com";
|
||||
@@ -57,6 +59,8 @@ Auto-generated by PhaseFlow`;
|
||||
subject,
|
||||
text: body,
|
||||
});
|
||||
|
||||
emailSentTotal.inc({ type: "daily" });
|
||||
}
|
||||
|
||||
export async function sendPeriodConfirmationEmail(
|
||||
@@ -114,4 +118,6 @@ Auto-generated by PhaseFlow`;
|
||||
subject,
|
||||
text: body,
|
||||
});
|
||||
|
||||
emailSentTotal.inc({ type: "warning" });
|
||||
}
|
||||
|
||||
200
src/lib/metrics.test.ts
Normal file
200
src/lib/metrics.test.ts
Normal file
@@ -0,0 +1,200 @@
|
||||
// ABOUTME: Tests for the Prometheus metrics collection module.
|
||||
// ABOUTME: Validates metric registration, counters, gauges, histograms per observability spec.
|
||||
|
||||
import * as promClient from "prom-client";
|
||||
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
|
||||
|
||||
describe("metrics", () => {
|
||||
beforeEach(async () => {
|
||||
// Clear the default registry before each test
|
||||
promClient.register.clear();
|
||||
vi.resetModules();
|
||||
});
|
||||
|
||||
afterEach(() => {
|
||||
promClient.register.clear();
|
||||
});
|
||||
|
||||
describe("registry", () => {
|
||||
it("exports a Prometheus registry", async () => {
|
||||
const { metricsRegistry } = await import("./metrics");
|
||||
expect(metricsRegistry).toBeDefined();
|
||||
expect(typeof metricsRegistry.metrics).toBe("function");
|
||||
});
|
||||
|
||||
it("collects default Node.js metrics", async () => {
|
||||
const { metricsRegistry } = await import("./metrics");
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
|
||||
// Should include standard Node.js metrics
|
||||
expect(metrics).toContain("nodejs_");
|
||||
expect(metrics).toContain("process_");
|
||||
});
|
||||
});
|
||||
|
||||
describe("custom metrics - garmin sync", () => {
|
||||
it("exports phaseflow_garmin_sync_total counter", async () => {
|
||||
const { garminSyncTotal } = await import("./metrics");
|
||||
expect(garminSyncTotal).toBeDefined();
|
||||
expect(garminSyncTotal.inc).toBeDefined();
|
||||
});
|
||||
|
||||
it("increments garmin sync total with success status", async () => {
|
||||
const { garminSyncTotal, metricsRegistry } = await import("./metrics");
|
||||
garminSyncTotal.inc({ status: "success" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_garmin_sync_total{status="success"} 1',
|
||||
);
|
||||
});
|
||||
|
||||
it("increments garmin sync total with failure status", async () => {
|
||||
const { garminSyncTotal, metricsRegistry } = await import("./metrics");
|
||||
garminSyncTotal.inc({ status: "failure" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_garmin_sync_total{status="failure"} 1',
|
||||
);
|
||||
});
|
||||
|
||||
it("exports phaseflow_garmin_sync_duration_seconds histogram", async () => {
|
||||
const { garminSyncDuration } = await import("./metrics");
|
||||
expect(garminSyncDuration).toBeDefined();
|
||||
expect(garminSyncDuration.observe).toBeDefined();
|
||||
});
|
||||
|
||||
it("records garmin sync duration", async () => {
|
||||
const { garminSyncDuration, metricsRegistry } = await import("./metrics");
|
||||
garminSyncDuration.observe(1.5);
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain(
|
||||
"phaseflow_garmin_sync_duration_seconds_bucket",
|
||||
);
|
||||
expect(metrics).toContain(
|
||||
"phaseflow_garmin_sync_duration_seconds_sum 1.5",
|
||||
);
|
||||
expect(metrics).toContain(
|
||||
"phaseflow_garmin_sync_duration_seconds_count 1",
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe("custom metrics - email", () => {
|
||||
it("exports phaseflow_email_sent_total counter", async () => {
|
||||
const { emailSentTotal } = await import("./metrics");
|
||||
expect(emailSentTotal).toBeDefined();
|
||||
expect(emailSentTotal.inc).toBeDefined();
|
||||
});
|
||||
|
||||
it("increments email sent total with daily type", async () => {
|
||||
const { emailSentTotal, metricsRegistry } = await import("./metrics");
|
||||
emailSentTotal.inc({ type: "daily" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain('phaseflow_email_sent_total{type="daily"} 1');
|
||||
});
|
||||
|
||||
it("increments email sent total with warning type", async () => {
|
||||
const { emailSentTotal, metricsRegistry } = await import("./metrics");
|
||||
emailSentTotal.inc({ type: "warning" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain('phaseflow_email_sent_total{type="warning"} 1');
|
||||
});
|
||||
});
|
||||
|
||||
describe("custom metrics - decision engine", () => {
|
||||
it("exports phaseflow_decision_engine_calls_total counter", async () => {
|
||||
const { decisionEngineCallsTotal } = await import("./metrics");
|
||||
expect(decisionEngineCallsTotal).toBeDefined();
|
||||
expect(decisionEngineCallsTotal.inc).toBeDefined();
|
||||
});
|
||||
|
||||
it("increments decision engine calls with decision label", async () => {
|
||||
const { decisionEngineCallsTotal, metricsRegistry } = await import(
|
||||
"./metrics"
|
||||
);
|
||||
decisionEngineCallsTotal.inc({ decision: "REST" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_decision_engine_calls_total{decision="REST"} 1',
|
||||
);
|
||||
});
|
||||
|
||||
it("tracks multiple decision types", async () => {
|
||||
const { decisionEngineCallsTotal, metricsRegistry } = await import(
|
||||
"./metrics"
|
||||
);
|
||||
decisionEngineCallsTotal.inc({ decision: "REST" });
|
||||
decisionEngineCallsTotal.inc({ decision: "REST" });
|
||||
decisionEngineCallsTotal.inc({ decision: "GENTLE" });
|
||||
decisionEngineCallsTotal.inc({ decision: "GO" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_decision_engine_calls_total{decision="REST"} 2',
|
||||
);
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_decision_engine_calls_total{decision="GENTLE"} 1',
|
||||
);
|
||||
expect(metrics).toContain(
|
||||
'phaseflow_decision_engine_calls_total{decision="GO"} 1',
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe("custom metrics - active users", () => {
|
||||
it("exports phaseflow_active_users gauge", async () => {
|
||||
const { activeUsersGauge } = await import("./metrics");
|
||||
expect(activeUsersGauge).toBeDefined();
|
||||
expect(activeUsersGauge.set).toBeDefined();
|
||||
});
|
||||
|
||||
it("sets active users count", async () => {
|
||||
const { activeUsersGauge, metricsRegistry } = await import("./metrics");
|
||||
activeUsersGauge.set(42);
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain("phaseflow_active_users 42");
|
||||
});
|
||||
|
||||
it("can increment and decrement active users gauge", async () => {
|
||||
const { activeUsersGauge, metricsRegistry } = await import("./metrics");
|
||||
activeUsersGauge.set(10);
|
||||
activeUsersGauge.inc();
|
||||
activeUsersGauge.dec();
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
expect(metrics).toContain("phaseflow_active_users 10");
|
||||
});
|
||||
});
|
||||
|
||||
describe("metrics format", () => {
|
||||
it("produces valid Prometheus text format", async () => {
|
||||
const { metricsRegistry, garminSyncTotal, emailSentTotal } = await import(
|
||||
"./metrics"
|
||||
);
|
||||
garminSyncTotal.inc({ status: "success" });
|
||||
emailSentTotal.inc({ type: "daily" });
|
||||
|
||||
const metrics = await metricsRegistry.metrics();
|
||||
|
||||
// Should contain TYPE and HELP comments for custom metrics
|
||||
expect(metrics).toContain("# TYPE phaseflow_garmin_sync_total counter");
|
||||
expect(metrics).toContain("# HELP phaseflow_garmin_sync_total");
|
||||
expect(metrics).toContain("# TYPE phaseflow_email_sent_total counter");
|
||||
expect(metrics).toContain("# HELP phaseflow_email_sent_total");
|
||||
});
|
||||
|
||||
it("returns content type for Prometheus", async () => {
|
||||
const { metricsRegistry } = await import("./metrics");
|
||||
expect(metricsRegistry.contentType).toBe(
|
||||
"text/plain; version=0.0.4; charset=utf-8",
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
49
src/lib/metrics.ts
Normal file
49
src/lib/metrics.ts
Normal file
@@ -0,0 +1,49 @@
|
||||
// ABOUTME: Prometheus metrics collection module for production monitoring.
|
||||
// ABOUTME: Exposes counters, gauges, and histograms for Garmin sync, email, and decision engine.
|
||||
|
||||
import * as promClient from "prom-client";
|
||||
|
||||
// Create a new registry for our application metrics
|
||||
export const metricsRegistry = new promClient.Registry();
|
||||
|
||||
// Collect default Node.js metrics (heap, event loop, etc.)
|
||||
promClient.collectDefaultMetrics({ register: metricsRegistry });
|
||||
|
||||
// Custom metric: Garmin sync operations counter
|
||||
export const garminSyncTotal = new promClient.Counter({
|
||||
name: "phaseflow_garmin_sync_total",
|
||||
help: "Total number of Garmin sync operations",
|
||||
labelNames: ["status"] as const,
|
||||
registers: [metricsRegistry],
|
||||
});
|
||||
|
||||
// Custom metric: Garmin sync duration histogram
|
||||
export const garminSyncDuration = new promClient.Histogram({
|
||||
name: "phaseflow_garmin_sync_duration_seconds",
|
||||
help: "Duration of Garmin sync operations in seconds",
|
||||
buckets: [0.1, 0.5, 1, 2, 5, 10],
|
||||
registers: [metricsRegistry],
|
||||
});
|
||||
|
||||
// Custom metric: Email sent counter
|
||||
export const emailSentTotal = new promClient.Counter({
|
||||
name: "phaseflow_email_sent_total",
|
||||
help: "Total number of emails sent",
|
||||
labelNames: ["type"] as const,
|
||||
registers: [metricsRegistry],
|
||||
});
|
||||
|
||||
// Custom metric: Decision engine calls counter
|
||||
export const decisionEngineCallsTotal = new promClient.Counter({
|
||||
name: "phaseflow_decision_engine_calls_total",
|
||||
help: "Total number of decision engine calls",
|
||||
labelNames: ["decision"] as const,
|
||||
registers: [metricsRegistry],
|
||||
});
|
||||
|
||||
// Custom metric: Active users gauge
|
||||
export const activeUsersGauge = new promClient.Gauge({
|
||||
name: "phaseflow_active_users",
|
||||
help: "Number of users with activity in the last 24 hours",
|
||||
registers: [metricsRegistry],
|
||||
});
|
||||
Reference in New Issue
Block a user