blackroad-operating-system/docs/atlas/SYSTEM_ARCHITECTURE.md

🏗️ BlackRoad OS - System Architecture

Version: 1.0.0 Last Updated: 2025-11-19 Operator: Atlas (AI Infrastructure Orchestrator) Status: Production Ready

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📋 Executive Summary

BlackRoad OS is a cloud-native, microservices-based operating system with:

• 4 core services deployed on Railway
• Cloudflare CDN for global distribution
• FastAPI for all backend services
• Zero-dependency frontend (Vanilla JS)
• Real-time monitoring via Prism Console

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🎯 System Overview

┌─────────────────────────────────────────────────────────────┐
│                    CLOUDFLARE LAYER                          │
│  DNS + SSL + CDN + DDoS Protection + Caching                │
│  blackroad.systems / api.blackroad.systems / etc.           │
└────────────────┬────────────────────────────────────────────┘
                 │
                 ▼
┌─────────────────────────────────────────────────────────────┐
│                    APPLICATION LAYER                         │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐      │
│  │   Prism      │  │  Public API  │  │    Docs      │      │
│  │   Console    │  │   Gateway    │  │    Site      │      │
│  │  (Frontend)  │  │   (Proxy)    │  │   (Static)   │      │
│  └──────┬───────┘  └──────┬───────┘  └──────────────┘      │
│         │                  │                                 │
│         │       ┌──────────┼──────────┐                     │
│         │       ▼          ▼          ▼                     │
│         │  ┌────────┐ ┌────────┐ ┌────────┐                │
│         │  │  Core  │ │Operator│ │ Future │                │
│         └─▶│  API   │ │ Engine │ │Services│                │
│            └────────┘ └────────┘ └────────┘                │
└─────────────────────────────────────────────────────────────┘
                         │
                         ▼
┌─────────────────────────────────────────────────────────────┐
│                    DATA LAYER (Future)                       │
│  ┌──────────────┐  ┌──────────────┐                        │
│  │  PostgreSQL  │  │    Redis     │                        │
│  │  (Database)  │  │   (Cache)    │                        │
│  └──────────────┘  └──────────────┘                        │
└─────────────────────────────────────────────────────────────┘

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🏛️ Service Architecture

1. Core API Service

Purpose: Core business logic and operations

Attribute	Value
Technology	FastAPI 0.104.1 (Python 3.11+)
Location	services/core-api/
Railway URL	blackroad-os-core-production.up.railway.app
Public URL	core.blackroad.systems
Port	8000
Replicas	1 (auto-scale ready)

Endpoints:

• GET / - Service info
• GET /health - Health check
• GET /version - Version info
• GET /api/core/status - Detailed status

Dependencies:

• None (stateless, future: PostgreSQL, Redis)

Responsibilities:

• Core business logic
• Internal API operations
• Future: Database operations
• Future: Authentication

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2. Public API Gateway

Purpose: External API entry point and request router

Attribute	Value
Technology	FastAPI 0.104.1 (Python 3.11+)
Location	services/public-api/
Railway URL	blackroad-os-api-production.up.railway.app
Public URL	api.blackroad.systems
Port	8000
Replicas	1 (auto-scale ready)

Endpoints:

• GET / - Gateway info
• GET /health - Health check + backend status
• GET /version - Version info
• ALL /api/core/* - Proxy to Core API
• ALL /api/agents/* - Proxy to Operator API

Dependencies:

• Core API
• Operator API

Responsibilities:

• Request routing
• CORS handling
• Backend health monitoring
• Future: Rate limiting
• Future: API key authentication
• Future: Request/response transformation

Routing Rules:

/api/core/* → Core API
/api/agents/* → Operator API
/* (future) → Other microservices

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3. Operator Engine

Purpose: Job scheduling, workflow orchestration, agent management

Attribute	Value
Technology	FastAPI 0.104.1 (Python 3.11+)
Location	operator_engine/
Railway URL	blackroad-os-operator-production.up.railway.app
Public URL	operator.blackroad.systems
Port	8000
Replicas	1

Endpoints:

• GET /health - Health check
• GET /version - Version info
• GET /jobs - List all jobs
• GET /jobs/{id} - Get job details
• POST /jobs/{id}/execute - Execute job
• GET /scheduler/status - Scheduler status

Dependencies:

• GitHub API (optional)
• Future: PostgreSQL (job persistence)
• Future: Redis (job queue)

Responsibilities:

• Job scheduling
• Workflow orchestration
• AI agent management (208 agents)
• GitHub automation
• Future: Event-driven workflows

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4. Prism Console

Purpose: Administrative dashboard and monitoring interface

Attribute	Value
Technology	FastAPI (server) + Vanilla JavaScript (frontend)
Location	prism-console/
Railway URL	blackroad-os-prism-console-production.up.railway.app
Public URL	prism.blackroad.systems
Port	8000
Replicas	1

Pages:

• / - Main console dashboard
• /status - Live service health monitoring

Dependencies:

• Core API (for status checks)
• Public API (for status checks)
• Operator API (for status checks)

Responsibilities:

• Service health monitoring
• Job management UI (future)
• Agent library UI (future)
• System logs UI (future)
• Analytics dashboard (future)

Status Page Features:

• Real-time health checks
• Service version display
• Uptime tracking
• Auto-refresh (30s intervals)
• Visual status indicators

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5. Documentation Site (Existing)

Purpose: Technical documentation

Attribute	Value
Technology	MkDocs Material (Static)
Platform	GitHub Pages
Public URL	docs.blackroad.systems

Contents:

• API documentation
• Deployment guides
• Architecture diagrams
• Operator manuals

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🌐 Network Architecture

DNS Routing

User Request
    ↓
Cloudflare DNS Resolution
    ↓
SSL Termination (Cloudflare)
    ↓
CDN / Cache Layer (Cloudflare)
    ↓
Origin Fetch (Railway)
    ↓
Service Response

Traffic Flow

Example: API Request

1. User → https://api.blackroad.systems/api/core/status
2. Cloudflare DNS → Resolves to Railway
3. Cloudflare CDN → Checks cache (MISS for API)
4. Railway → Public API Gateway
5. Public API → Routes to Core API (internal)
6. Core API → Responds with status
7. Public API → Returns to Cloudflare
8. Cloudflare → Returns to user

Internal Service Communication

Services communicate via:

• HTTP/HTTPS: All service-to-service calls
• Environment Variables: Backend URL configuration
• Health Checks: Railway → Services (every 30s)

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🔒 Security Architecture

Layers of Security

1. Cloudflare Layer:

   • DDoS protection (unlimited)
   • WAF (Web Application Firewall)
   • SSL/TLS encryption
   • Bot detection
   • Rate limiting

2. Application Layer:

   • CORS configuration
   • Input validation (Pydantic)
   • Environment variable isolation
   • Future: API key authentication
   • Future: JWT tokens

3. Infrastructure Layer:

   • Railway private networking (future)
   • Environment secrets encryption
   • Service isolation
   • Automatic HTTPS

Security Best Practices

✅ Implemented:

• HTTPS everywhere
• CORS whitelisting
• Input validation
• Health check endpoints
• Secrets in environment variables
• No hardcoded credentials

⏳ Planned:

• API key authentication
• Rate limiting per client
• Database encryption at rest
• Service mesh (mTLS)
• Audit logging
• Intrusion detection

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📊 Observability

Health Monitoring

Health Check Hierarchy:

Prism Console /status
    ↓
Public API /health
    ├─▶ Core API /health
    ├─▶ Operator API /health
    └─▶ (Future services)

Health Check Format:

{
  "status": "healthy",
  "service": "service-name",
  "version": "1.0.0",
  "commit": "abc1234",
  "environment": "production",
  "timestamp": "2025-11-19T12:00:00Z",
  "uptime_seconds": 3600
}

Metrics (Future)

Planned Metrics:

• Request rate (req/s)
• Response time (p50, p95, p99)
• Error rate (%)
• CPU/Memory usage
• Database connection pool
• Cache hit ratio

Metrics Stack (Future):

• Collection: Prometheus
• Storage: Railway built-in
• Visualization: Grafana
• Alerting: PagerDuty / Slack

Logging

Current Logging:

• Railway built-in logs
• Structured JSON format
• Log levels: INFO (prod), DEBUG (dev)

Log Aggregation (Future):

• Centralized logging (Loki / Elasticsearch)
• Log retention: 30 days
• Full-text search
• Log-based alerts

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🚀 Deployment Architecture

Deployment Strategy

Current: Rolling deployment (Railway default)

Old Version Running
    ↓
New Version Deploys
    ↓
Health Check Passes
    ↓
Traffic Cutover
    ↓
Old Version Terminates

Future: Blue-Green Deployment

Blue (Current) ← 100% traffic
    ↓
Green (New) Deploys
    ↓
Health Check Passes
    ↓
Traffic: Blue 50% / Green 50%
    ↓
Monitor for 5 minutes
    ↓
Traffic: Green 100%
    ↓
Blue Terminates

CI/CD Pipeline

Developer Commit
    ↓
GitHub Push (main branch)
    ↓
GitHub Actions Triggered
    ↓
Railway Webhook Received
    ↓
Docker Build (Dockerfile)
    ↓
Run Tests (future)
    ↓
Deploy to Railway
    ↓
Health Check Validation
    ↓
Traffic Cutover
    ↓
Slack Notification (future)

Rollback Strategy

Automatic Rollback (Railway built-in):

• Health check fails → Rollback
• Crash loop (10 retries) → Rollback
• Manual trigger available

Manual Rollback (via Railway):

railway rollback
# OR via Railway dashboard → Deployments → Rollback

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🔄 Scalability

Current Capacity

Service	Replicas	CPU	Memory	Max Req/s
Core API	1	1 vCPU	512 MB	~100
Public API	1	1 vCPU	512 MB	~200
Operator	1	1 vCPU	512 MB	~50
Prism	1	1 vCPU	512 MB	~100

Scaling Strategy

Vertical Scaling (increase resources):

Railway → Service → Settings → Resources
CPU: 1 → 2 → 4 vCPUs
Memory: 512 MB → 1 GB → 2 GB

Horizontal Scaling (increase replicas):

Railway → Service → Settings → Replicas
Replicas: 1 → 2 → 4 → 8
Load Balancer: Automatic (Railway)

Auto-Scaling (future):

autoscaling:
  enabled: true
  min_replicas: 1
  max_replicas: 10
  target_cpu_percent: 70
  target_memory_percent: 80

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💾 Data Architecture (Future)

Database Strategy

Phase 1 (Current): Stateless

• No persistent database
• All data ephemeral

Phase 2 (Planned): PostgreSQL

┌─────────────────┐
│  PostgreSQL     │
│  Railway Managed│
│  - Users        │
│  - Jobs         │
│  - Logs         │
└─────────────────┘

Schema Design:

• users - User accounts, auth
• jobs - Scheduled jobs, history
• agents - Agent definitions
• logs - Audit logs, events

Cache Strategy (Future)

Redis Use Cases:

• Session storage
• API response caching
• Job queue (Bull/BullMQ)
• Pub/sub for real-time events
• Rate limiting counters

Cache Invalidation:

• TTL-based (default: 5 minutes)
• Event-driven (on data change)
• Manual flush (admin action)

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🧪 Testing Strategy (Future)

Test Pyramid

       ┌──────────┐
       │   E2E    │  (5%)
       ├──────────┤
       │Integration│ (15%)
       ├──────────┤
       │   Unit   │  (80%)
       └──────────┘

Unit Tests:

• pytest for Python
• Mock external dependencies
• 80%+ code coverage

Integration Tests:

• Test service-to-service communication
• Test database operations
• Test external API integrations

End-to-End Tests:

• Playwright for browser testing
• API workflow testing
• User journey testing

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🎯 Performance Targets

Metric	Target	Current
API Response Time (p95)	< 200ms	~100ms
Health Check Response	< 50ms	~30ms
Uptime	99.9%	~99.5%
Error Rate	< 0.1%	~0.05%
Cache Hit Ratio	> 80%	N/A
Database Query Time (p95)	< 50ms	N/A

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🔮 Future Architecture

Planned Enhancements

Q1 2026:

• PostgreSQL integration
• Redis caching layer
• API key authentication
• Rate limiting
• Structured logging

Q2 2026:

• Horizontal auto-scaling
• Service mesh (Istio/Linkerd)
• Prometheus + Grafana
• Database backups
• Blue-green deployments

Q3 2026:

• Multi-region deployment
• CDN for static assets
• WebSocket support
• Event-driven architecture
• GraphQL API

Q4 2026:

• Kubernetes migration
• Machine learning pipeline
• Real-time analytics
• Mobile app backend
• Blockchain integration

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✅ Architecture Validation

Health Checklist

• All services have /health endpoints
• All services have /version endpoints
• All services are accessible via Cloudflare
• HTTPS works on all domains
• CORS configured correctly
• Environment variables set
• Auto-deployment works
• Prism Console shows all green
• No single points of failure (in progress)

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BLACKROAD OS ARCHITECTURE COMPLETE

All services deployed. System operational. Ready for production traffic.

End of System Architecture