Review: Design GCP deployment architecture for backend

[jfarcand]

• Add production-ready Terraform infrastructure code

  • Cloud Run service with auto-scaling (0-100 instances)
  • Cloud SQL PostgreSQL 16 with HA support
  • VPC networking with private IP and Cloud NAT
  • Secret Manager integration for OAuth credentials
  • Service account with least-privilege IAM roles
  • Monitoring with uptime checks and alerting

• Add Cloud Build configurations

  • Automated CI/CD pipeline for staging deployments
  • Canary deployment strategy for production
  • Docker image building and artifact registry push
  • Smoke tests and health checks

• Add comprehensive documentation

  • Architecture overview with network diagrams
  • Complete deployment guide for all environments
  • Quick start guide (30-minute setup)
  • Terraform usage reference
  • Operations runbook and troubleshooting

• Add deployment automation scripts

  • GCP project setup script (enable APIs, IAM, etc.)
  • Terraform deployment wrapper with safety checks
  • Environment-specific configurations (dev/staging/prod)

Infrastructure highlights:

• Multi-environment support (dev/staging/production)
• Cost-optimized tiers (5/month dev, 00-1500/month prod)
• Auto-scaling based on load
• Regional HA for production databases
• Private networking for security
• Automated backups with 7-30 day retention
• Secret rotation support via Secret Manager
• Distributed tracing and structured logging

Technology choices (SRE analysis):

• Cloud Run: Serverless, auto-scaling, <500ms cold starts
• Cloud SQL: Managed PostgreSQL, automatic failover
• Terraform: Industry-standard IaC, multi-cloud ready
• Cloud Build: Integrated CI/CD with GitHub triggers

External API access configured for:

• Strava, Garmin, Fitbit (OAuth providers)
• OpenWeatherMap (weather data)
• USDA FoodData Central (nutrition data)

Compliant with CLAUDE.MD requirements:

• No hardcoded secrets (Secret Manager)
• Structured error handling
• Zero-tolerance security policies
• Comprehensive testing strategy

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.78%. Comparing base (f09a2da) to head (58e093e).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   47.43%   48.78%   +1.35%     
==========================================
  Files         220      233      +13     
  Lines       51838    62208   +10370     
  Branches      144      144              
==========================================
+ Hits        24587    30347    +5760     
- Misses      27251    31861    +4610     

Flag	Coverage Δ
backend-postgresql	50.73% <ø> (-0.01%)	⬇️
backend-sqlite	51.45% <ø> (+0.93%)	⬆️
frontend	15.92% <ø> (ø)

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