skybridge/docs/PRODUCTION_ROADMAP.md

KMS API Service - Production Roadmap

This document outlines the complete roadmap for making the API Key Management Service fully production-ready. Use the checkboxes to track progress and refer to the implementation notes at the bottom.

🏗️ Core Infrastructure (COMPLETED)

Repository Layer

• Complete token repository implementation (CRUD operations)
• Complete permission repository implementation (core methods)
• Implement granted permission repository (authorization logic)
• Add database transaction support
• Implement proper error handling in repositories

Security & Cryptography

• Implement secure token generation using crypto/rand
• Add bcrypt-based token hashing for storage
• Implement HMAC token signing and verification
• Create token format validation utilities
• Add cryptographic key management

Service Layer

• Update token service with secure generation
• Implement permission validation in token creation
• Add application validation before token operations
• Implement proper error propagation
• Add comprehensive logging throughout services

Middleware & Validation

• Create comprehensive input validation middleware
• Implement struct-based validation with detailed errors
• Add UUID parameter validation
• Create permission scope format validation
• Implement request sanitization

Error Handling

• Create structured error framework with typed codes
• Implement HTTP status code mapping
• Add error context and chaining support
• Create consistent JSON error responses
• Add retry logic indicators

Monitoring & Metrics

• Implement comprehensive metrics collection
• Add Prometheus-compatible metrics export
• Create HTTP request monitoring middleware
• Add business metrics tracking
• Implement system health metrics

🔐 Authentication & Authorization (HIGH PRIORITY)

JWT Implementation

• Complete JWT token generation and validation
• Implement token expiration and renewal logic
• Add JWT claims management
• Create token blacklisting mechanism
• Implement refresh token rotation
• Add comprehensive JWT unit tests with benchmarks
• Implement cache-based token revocation system

SSO Integration

• Implement OAuth2/OIDC provider integration
• Add OAuth2 authentication handlers with PKCE support
• Create OAuth2 discovery document fetching
• Implement authorization code exchange and token refresh
• Add user info retrieval from OAuth2 providers
• Create comprehensive OAuth2 unit tests with benchmarks
• Add SAML authentication support
• Create user session management
• Implement role-based access control (RBAC)
• Add multi-tenant authentication support

Permission System Enhancement

• Implement hierarchical permission inheritance
• Add dynamic permission evaluation
• Create permission caching mechanism
• Add bulk permission operations
• Implement default permission hierarchy (admin, read, write, app., token., etc.)
• Create role-based permission system with inheritance
• Add comprehensive permission unit tests with benchmarks
• Implement permission audit logging

🚀 Performance & Scalability (MEDIUM PRIORITY)

Caching Layer

• Implement basic caching layer with memory provider
• Add JSON serialization/deserialization support
• Create cache manager with TTL support
• Add cache key management and prefixes
• Implement Redis integration for caching
• Add token blacklist caching for revocation
• Add permission result caching
• Create application metadata caching
• Implement token validation result caching
• Add cache invalidation strategies

Database Optimization

• Implement database connection pool tuning
• Add query performance monitoring
• Create database migration rollback procedures
• Implement read replica support
• Add database backup and recovery procedures

Load Balancing & Clustering

• Implement horizontal scaling support
• Add load balancer health checks
• Create session affinity handling
• Implement distributed rate limiting
• Add circuit breaker patterns

🔒 Security Hardening (HIGH PRIORITY)

Advanced Security Features

• Implement API key rotation mechanisms
• Add brute force protection
• Create account lockout mechanisms
• Implement IP whitelisting/blacklisting
• Add request signing validation
• Implement rate limiting middleware
• Add security headers middleware
• Create authentication failure tracking

Audit & Compliance

• Implement comprehensive audit logging
• Add compliance reporting features
• Create data retention policies
• Implement GDPR compliance features
• Add security event alerting

Secrets Management

• Integrate with HashiCorp Vault or similar
• Implement automatic key rotation
• Add encrypted configuration storage
• Create secure backup procedures
• Implement key escrow mechanisms

🧪 Testing & Quality Assurance (MEDIUM PRIORITY)

Unit Testing

• Add comprehensive JWT authentication unit tests
• Create caching layer unit tests with benchmarks
• Implement authentication service unit tests
• Add comprehensive permission system unit tests
• Add comprehensive unit tests for repositories
• Create service layer unit tests
• Implement middleware unit tests
• Add crypto utility unit tests
• Create error handling unit tests

Integration Testing

• Expand integration test coverage
• Add database integration tests
• Create API endpoint integration tests
• Implement authentication flow tests
• Add permission validation tests

Performance Testing

• Implement load testing scenarios
• Add stress testing for concurrent operations
• Create database performance benchmarks
• Implement memory leak detection
• Add latency and throughput testing

Security Testing

• Implement penetration testing scenarios
• Add vulnerability scanning automation
• Create security regression tests
• Implement fuzzing tests
• Add compliance validation tests

📦 Deployment & Operations (MEDIUM PRIORITY)

Containerization & Orchestration

• Create optimized Docker images
• Implement Kubernetes manifests
• Add Helm charts for deployment
• Create deployment automation scripts
• Implement blue-green deployment strategy

Infrastructure as Code

• Create Terraform configurations
• Implement AWS/GCP/Azure resource definitions
• Add infrastructure testing
• Create disaster recovery procedures
• Implement infrastructure monitoring

CI/CD Pipeline

• Implement automated testing pipeline
• Add security scanning in CI/CD
• Create automated deployment pipeline
• Implement rollback mechanisms
• Add deployment notifications

📊 Observability & Monitoring (LOW PRIORITY)

Advanced Monitoring

• Implement distributed tracing
• Add application performance monitoring (APM)
• Create custom dashboards
• Implement alerting rules
• Add log aggregation and analysis

Business Intelligence

• Create usage analytics
• Implement cost tracking
• Add capacity planning metrics
• Create business KPI dashboards
• Implement trend analysis

🔧 Maintenance & Operations (ONGOING)

Documentation

• Create comprehensive API documentation
• Add deployment guides
• Create troubleshooting runbooks
• Implement architecture decision records (ADRs)
• Add security best practices guide

Maintenance Procedures

• Create backup and restore procedures
• Implement log rotation and archival
• Add database maintenance scripts
• Create performance tuning guides
• Implement capacity planning procedures

---

📝 Implementation Notes for Future Development

Code Organization Principles

1. Maintain Clean Architecture: Keep clear separation between domain, service, and infrastructure layers
2. Interface-First Design: Always define interfaces before implementations for better testability
3. Error Handling: Use the established error framework (internal/errors) for consistent error handling
4. Logging: Use structured logging with zap throughout the application
5. Configuration: Add new config options to internal/config/config.go with proper validation

Security Guidelines

1. Input Validation: Always validate inputs using the validation middleware (internal/middleware/validation.go)
2. Token Security: Use the crypto utilities (internal/crypto/token.go) for all token operations
3. Permission Checks: Always validate permissions using the repository layer before operations
4. Audit Logging: Log all security-relevant operations with user context
5. Secrets: Never hardcode secrets; use environment variables or secret management systems

Database Guidelines

1. Migrations: Always create both up and down migrations for schema changes
2. Transactions: Use database transactions for multi-step operations
3. Indexing: Add appropriate indexes for query performance
4. Connection Management: Use the existing connection pool configuration
5. Error Handling: Wrap database errors with the application error framework

Testing Guidelines

1. Test Structure: Follow the existing test structure in test/ directory
2. Mock Dependencies: Use interfaces for easy mocking in tests
3. Test Data: Use the test helpers for consistent test data creation
4. Integration Tests: Test against real database instances when possible
5. Coverage: Aim for >80% test coverage for critical paths

Performance Guidelines

1. Metrics: Use the metrics system (internal/metrics) to track performance
2. Caching: Implement caching at the service layer, not repository layer
3. Database Queries: Optimize queries and use appropriate indexes
4. Memory Management: Be mindful of memory allocations in hot paths
5. Concurrency: Use proper synchronization for shared resources

Deployment Guidelines

1. Environment Variables: Use environment-based configuration for all deployments
2. Health Checks: Ensure health endpoints are properly configured
3. Graceful Shutdown: Implement proper shutdown procedures for all services
4. Resource Limits: Set appropriate CPU and memory limits
5. Monitoring: Ensure metrics and logging are properly configured

Code Quality Standards

1. Go Standards: Follow standard Go conventions and best practices
2. Documentation: Document all public APIs and complex business logic
3. Error Messages: Provide clear, actionable error messages
4. Code Reviews: Require code reviews for all changes
5. Static Analysis: Use tools like golangci-lint for code quality

Security Best Practices

1. Principle of Least Privilege: Grant minimum necessary permissions
2. Defense in Depth: Implement multiple layers of security
3. Regular Updates: Keep dependencies updated for security patches
4. Secure Defaults: Use secure configurations by default
5. Security Testing: Include security testing in the development process

Operational Considerations

1. Monitoring: Implement comprehensive monitoring and alerting
2. Backup Strategy: Ensure regular backups and test restore procedures
3. Disaster Recovery: Have documented disaster recovery procedures
4. Capacity Planning: Monitor resource usage and plan for growth
5. Documentation: Keep operational documentation up to date

---

🎯 Priority Matrix

Immediate (Next Sprint)

• Complete JWT implementation
• Add comprehensive unit tests
• Implement caching layer basics

Short Term (1-2 Months)

• SSO integration
• Security hardening features
• Performance optimization

Medium Term (3-6 Months)

• Advanced monitoring and observability
• Deployment automation
• Compliance features

Long Term (6+ Months)

• Advanced analytics
• Multi-region deployment
• Advanced security features

---

Last Updated: [Current Date] Version: 1.0