feat: complete Blueprint v2.0 compliance - 100% (Issues #26, #27, #28)
This commit completes all three optimization issues from the Blueprint v2.0 roadmap,
achieving 100% compliance (23/23 checks) with the optimized blueprint.
## Issue #26: Configure Alembic Database Migration ✅
### Database Migration Framework
- Created alembic.ini with SQLite default and production PostgreSQL support
- Implemented async-capable alembic/env.py with SQLAlchemy 2.0 integration
- Added script.py.mako template following naming convention:
YYYYMMDD_HHMM_<revision>_<slug>
### SQLAlchemy Models
- Created backend/models/__init__.py with async engine and session factory
- Added backend/models/user.py (User model with authentication fields)
- Added backend/models/item.py (Item model with user relationship)
- Models follow best practices: indexed columns, timezone-aware timestamps
### Initial Migration
- Created alembic/versions/20250101_0001_initial_schema.py
- Implements Expand pattern (nullable columns, safe for zero-downtime)
- Creates users and items tables with proper constraints and indexes
### Kubernetes Integration
- Updated values-infra-db.yaml with database.migrations configuration
- Added PreSync migration job settings (ttl: 300s, backoff: 3)
- Configured resource limits for migration jobs
### Documentation
- Created comprehensive docs/database/migration-guide.md (365 lines)
- Covers: Expand/Contract pattern, K8s migrations, troubleshooting
- Includes production best practices and rollback strategies
## Issue #27: Integrate OpenTelemetry Distributed Tracing ✅
### OpenTelemetry SDK Integration
- Added 6 OpenTelemetry packages to requirements.txt:
* opentelemetry-api, opentelemetry-sdk (core)
* opentelemetry-instrumentation-fastapi (auto-instrumentation)
* opentelemetry-exporter-otlp (OTLP exporter)
* opentelemetry-instrumentation-sqlalchemy, httpx (DB and HTTP tracing)
### Backend Application Rewrite (backend/main.py)
- Implemented configure_opentelemetry() function:
* Creates Resource with SERVICE_NAME, SERVICE_VERSION, DEPLOYMENT_ENVIRONMENT
* Configures TracerProvider with BatchSpanProcessor
* Sets up OTLPSpanExporter to send to OpenTelemetry Collector
- Auto-instrumented FastAPI with FastAPIInstrumentor.instrument_app(app)
- Added manual span example in root endpoint with custom attributes
### Enhanced Structured Logging
- Created JSONFormatter with trace_id and span_id injection
- Logs now include:
* trace_id (32-char hex from OpenTelemetry span context)
* span_id (16-char hex)
* service, env, namespace, pod (for Grafana filtering)
- Enables log-trace correlation in Grafana/Loki
### Kubernetes Configuration
- Updated values-infra-db.yaml with OTEL environment variables:
* OTEL_ENABLED=true
* OTEL_SERVICE_NAME=gold-template
* OTEL_EXPORTER_OTLP_ENDPOINT (pointing to otel-collector in tracing namespace)
* OTEL_TRACES_SAMPLER=parentbased_traceidratio (10% sampling)
## Issue #28: Create Grafana Dashboard ✅
### Comprehensive Observability Dashboard
- Created deployment/grafana/dashboards/gold-template.json (582 lines)
- Dashboard: "Gold Template - Application Observability"
- UID: gold-template-observability
### Dashboard Panels (6 Total)
1. **Request Rate (RPS)** - Time series
- PromQL: rate(http_requests_total{namespace="$namespace"}[5m])
- Legend: {{method}} {{endpoint}}
- Unit: reqps
2. **Error Rate** - Gauge
- PromQL: rate(http_requests_total{status=~"5.."}[5m]) / rate(http_requests_total[5m])
- Thresholds: green < 5% < yellow < 10% < red
- Unit: percentunit
3. **Response Time (P50, P95, P99)** - Time series
- PromQL: histogram_quantile(0.50/0.95/0.99, rate(http_request_duration_seconds_bucket[5m]))
- Shows mean and max in legend table
- Unit: seconds
4. **Memory Usage** - Time series
- PromQL: container_memory_usage_bytes / container_spec_memory_limit_bytes
- Per-pod breakdown
- Unit: percentunit
5. **CPU Usage** - Time series
- PromQL: rate(container_cpu_usage_seconds_total[5m])
- Per-pod breakdown
- Unit: percentunit
6. **Application Logs** - Loki logs panel
- LogQL: {namespace="$namespace"} | json | line_format "{{.timestamp}} [{{.level}}] {{.message}} (trace_id={{.trace_id}})"
- Shows structured logs with trace_id for correlation
### Dashboard Features
- Template variables: namespace (gold-template/dev/prod), pod (multi-select)
- Auto-refresh: 30s
- Time range: Last 1 hour (default)
- Tags: gold-template, fastapi, observability
- Datasources: Prometheus, Loki (via variables ${DS_PROMETHEUS}, ${DS_LOKI})
## Compliance Verification
- Ran .claude/skills/blueprint-checker/checker.py
- **Score: 23/23 (100%)** ✅
- All categories passing:
* Observability: 7/7 (Prometheus, logs, trace_id, OpenTelemetry, ServiceMonitor)
* Database: 4/4 (Alembic, migrations, PreSync job, infra DB)
* Deployment: 4/4 (Argo CD, Helm, multi-env, Dockerfile)
* CI/CD: 4/4 (GitHub Actions, GitOps, quality checks, security scans)
* Code Quality: 4/4 (dependencies, tests, docs, env example)
## Technical Highlights
- **Zero-Downtime Migrations:** Expand/Contract pattern with PreSync hooks
- **Full Observability:** Metrics + Traces + Logs (Golden Signals + trace correlation)
- **Production-Ready:** Async SQLAlchemy, structured logging, resource limits
- **GitOps Compliant:** All changes via Git, Argo CD auto-sync
- **Multi-Environment:** Separate configs for dev/prod with different sampling rates
## Files Changed
- Created: alembic.ini, alembic/env.py, alembic/script.py.mako
- Created: alembic/versions/20250101_0001_initial_schema.py
- Created: backend/models/__init__.py, user.py, item.py
- Modified: backend/main.py (complete rewrite with OpenTelemetry)
- Modified: requirements.txt (+6 OpenTelemetry packages)
- Modified: deployment/helm/gold-template/values-infra-db.yaml
- Created: deployment/grafana/dashboards/gold-template.json
- Created: docs/database/migration-guide.md
Closes #26
Closes #27
Closes #28
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
brunoandClaude Sonnet 4.5
68fe711ab7