deployment_architecture.md

Deployment Architecture

Overview

This document outlines the deployment architecture for the Lin application, including both the React frontend and Flask API backend.

Architecture Diagram

graph TD
    A[Client Browser] --> B[CDN - Frontend Assets]
    A --> C[Load Balancer]
    C --> D[API Gateway]
    D --> E[Flask API Server 1]
    D --> F[Flask API Server 2]
    D --> G[Flask API Server N]
    E --> H[Supabase Database]
    F --> H
    G --> H
    H --> I[Supabase Auth]
    H --> J[Supabase Storage]
    E --> K[External APIs]
    F --> K
    G --> K
    K --> L[LinkedIn API]
    K --> M[Hugging Face API]

Components

Client Layer

• Web browsers (desktop and mobile)
• Mobile applications (future consideration)
• API consumers (third-party integrations)

Frontend Layer

• React application hosted on CDN
• Static assets (HTML, CSS, JavaScript, images)
• Client-side routing
• Browser-based caching

API Layer

• Load balancer for traffic distribution
• API gateway for request routing
• Multiple Flask API server instances
• Horizontal scaling capabilities

Backend Services Layer

• Supabase as the primary database
• Supabase Auth for user authentication
• Supabase Storage for file storage
• External API integrations

External Services

• LinkedIn API for social media integration
• Hugging Face API for content generation
• Email service for user notifications

Deployment Environments

Development

• Local development environments
• Development database with sample data
• Debugging tools enabled
• Hot reloading for frontend development

Staging

• Pre-production environment
• Mirror of production configuration
• Testing of new features
• Performance testing

Production

• Live environment for users
• High availability configuration
• Monitoring and alerting
• Backup and disaster recovery

Infrastructure Requirements

Frontend Hosting

• CDN for static asset delivery
• HTTPS support
• Custom domain configuration
• Cache invalidation strategy

Backend Hosting

• Cloud hosting platform (AWS, Google Cloud, Azure)
• Container orchestration (Docker Swarm, Kubernetes)
• Auto-scaling groups
• Health monitoring

Database

• Supabase project with production plan
• Database backups
• Point-in-time recovery
• Read replicas for scaling

Networking

• SSL certificates for HTTPS
• DNS configuration
• Firewall rules
• DDoS protection

Scalability

Horizontal Scaling

• Multiple API server instances
• Load balancing across instances
• Stateless application design
• Shared database for consistency

Vertical Scaling

• Increasing server resources (CPU, memory)
• Database scaling options
• CDN bandwidth scaling

Auto-scaling

• CPU-based scaling policies
• Request-based scaling policies
• Minimum and maximum instance limits
• Scaling cooldown periods

Security

Network Security

• Firewall configuration
• Private networks for backend services
• SSL/TLS encryption
• DDoS protection

Application Security

• Authentication and authorization
• Input validation and sanitization
• Secure headers
• CORS policy configuration

Data Security

• Encryption at rest
• Encryption in transit
• Database access controls
• Regular security audits

Monitoring and Logging

Application Monitoring

• Uptime monitoring
• Performance metrics
• Error tracking
• Custom dashboards

Infrastructure Monitoring

• Server health metrics
• Network performance
• Database performance
• Resource utilization

Logging

• Centralized log management
• Log retention policies
• Log analysis tools
• Alerting based on log patterns

Backup and Disaster Recovery

Data Backup

• Automated database backups
• Backup retention policies
• Point-in-time recovery
• Cross-region replication

Disaster Recovery

• Recovery time objectives (RTO)
• Recovery point objectives (RPO)
• Failover procedures
• Business continuity planning

CI/CD Pipeline

Continuous Integration

• Automated testing on pull requests
• Code quality checks
• Security scanning
• Build artifact generation

Continuous Deployment

• Automated deployment to staging
• Manual approval for production
• Rollback capabilities
• Blue-green deployment strategy

Environment Promotion

• Development to staging
• Staging to production
• Feature flag management
• A/B testing capabilities

Cost Considerations

Infrastructure Costs

• Cloud hosting fees
• CDN costs
• Database hosting
• External API usage

Operational Costs

• Monitoring and logging tools
• Backup storage
• Support and maintenance
• Team productivity tools

Optimization Strategies

• Resource right-sizing
• Caching strategies
• Content delivery optimization
• Usage-based scaling

Maintenance

Regular Maintenance

• Security updates
• Dependency updates
• Performance tuning
• Database maintenance

Scheduled Downtime

• Maintenance windows
• Communication plan
• Rollback procedures
• Post-maintenance validation

Incident Response

• Incident classification
• Escalation procedures
• Communication protocols
• Post-incident analysis