the_order/docs/architecture/CLOUD_FOR_SOVEREIGNTY_LANDING_ZONE.md

Cloud for Sovereignty Landing Zone Architecture

Last Updated: 2025-01-27
Management Group: SOVEREIGN-ORDER-OF-HOSPITALLERS
Framework: Azure Well-Architected Framework + Cloud for Sovereignty
Status: Planning Phase

Executive Summary

This document outlines a comprehensive Cloud for Sovereignty landing zone architecture for The Order, designed using Azure Well-Architected Framework principles. The architecture spans all non-US Azure commercial regions to ensure data sovereignty, compliance, and operational resilience.

Management Group Hierarchy

SOVEREIGN-ORDER-OF-HOSPITALLERS (Root)
├── Landing Zones
│   ├── Platform (Platform team managed)
│   ├── Sandbox (Development/testing)
│   └── Workloads (Application workloads)
├── Management
│   ├── Identity (Identity and access management)
│   ├── Security (Security operations)
│   └── Monitoring (Centralized monitoring)
└── Connectivity
    ├── Hub Networks (Regional hubs)
    └── Spoke Networks (Workload networks)

Well-Architected Framework Pillars

1. Cost Optimization

Principles:

• Right-sizing resources per region
• Reserved instances for predictable workloads
• Spot instances for non-critical workloads
• Cost allocation tags for chargeback
• Budget alerts and governance

Implementation:

• Cost Management budgets per management group
• Azure Advisor recommendations
• Resource tagging strategy
• Reserved capacity planning

2. Operational Excellence

Principles:

• Infrastructure as Code (Terraform)
• Automated deployments (GitHub Actions)
• Centralized logging and monitoring
• Runbooks and playbooks
• Change management processes

Implementation:

• Terraform modules for repeatable deployments
• CI/CD pipelines for infrastructure
• Azure Monitor and Log Analytics
• Azure Automation for runbooks

3. Performance Efficiency

Principles:

• Regional proximity for low latency
• CDN for global content delivery
• Auto-scaling for dynamic workloads
• Performance monitoring and optimization
• Database query optimization

Implementation:

• Multi-region deployment
• Azure Front Door for global routing
• Azure CDN for static assets
• Application Insights for performance tracking

4. Reliability

Principles:

• Multi-region redundancy
• Availability Zones within regions
• Automated failover
• Disaster recovery procedures
• Health monitoring and alerting

Implementation:

• Primary and secondary regions
• Geo-replication for storage
• Traffic Manager for DNS failover
• RTO: 4 hours, RPO: 1 hour

5. Security

Principles:

• Zero-trust architecture
• Defense in depth
• Data encryption at rest and in transit
• Identity and access management
• Security monitoring and threat detection

Implementation:

• Azure AD for identity
• Key Vault for secrets management
• Network Security Groups and Azure Firewall
• Microsoft Defender for Cloud
• Azure Sentinel for SIEM

Cloud for Sovereignty Requirements

Data Residency

• Requirement: All data must remain within specified regions
• Implementation:
  • Resource location policies
  • Storage account geo-replication controls
  • Database replication restrictions

Data Protection

• Requirement: Encryption and access controls
• Implementation:
  • Customer-managed keys (CMK)
  • Azure Key Vault with HSM
  • Private endpoints for services

Compliance

• Requirement: GDPR, eIDAS, and regional compliance
• Implementation:
  • Compliance policies and initiatives
  • Audit logging and retention
  • Data classification and labeling

Operational Control

• Requirement: Sovereign operations and control
• Implementation:
  • Management group hierarchy
  • Policy-based governance
  • Role-based access control (RBAC)

Regional Architecture

Supported Regions (Non-US Commercial)

1. West Europe (Netherlands) - Primary
2. North Europe (Ireland) - Secondary
3. UK South (London) - UK workloads
4. Switzerland North (Zurich) - Swiss workloads
5. Norway East (Oslo) - Nordic workloads
6. France Central (Paris) - French workloads
7. Germany West Central (Frankfurt) - German workloads

Regional Deployment Pattern

Each region follows the same pattern:

Region
├── Hub Network (VNet)
│   ├── Gateway Subnet (VPN/ExpressRoute)
│   ├── Azure Firewall Subnet
│   └── Management Subnet
├── Spoke Networks (Workloads)
│   ├── Application Subnet
│   ├── Database Subnet
│   └── Storage Subnet
├── Key Vault (Regional)
├── Storage Account (Regional)
├── Database (Regional)
└── AKS Cluster (Regional)

Landing Zone Components

1. Identity and Access Management

• Azure AD Tenant: Single tenant per sovereignty requirement
• Management Groups: Hierarchical organization
• RBAC: Role-based access control
• Conditional Access: Location-based policies
• Privileged Identity Management: Just-in-time access

2. Network Architecture

• Hub-and-Spoke: Centralized connectivity
• Azure Firewall: Centralized security
• Private Endpoints: Secure service access
• VPN/ExpressRoute: Hybrid connectivity
• Network Watcher: Monitoring and diagnostics

3. Security and Compliance

• Microsoft Defender for Cloud: Security posture management
• Azure Sentinel: SIEM and SOAR
• Key Vault: Secrets and certificate management
• Azure Policy: Governance and compliance
• Azure Blueprints: Standardized deployments

4. Monitoring and Logging

• Log Analytics Workspaces: Regional workspaces
• Application Insights: Application monitoring
• Azure Monitor: Infrastructure monitoring
• Azure Service Health: Service status
• Azure Advisor: Best practice recommendations

5. Backup and Disaster Recovery

• Azure Backup: Centralized backup
• Azure Site Recovery: DR orchestration
• Geo-replication: Cross-region replication
• Backup Vault: Regional backup storage

6. Governance

• Azure Policy: Resource compliance
• Azure Blueprints: Standardized environments
• Cost Management: Budget and cost tracking
• Resource Tags: Organization and chargeback
• Management Groups: Hierarchical governance

Resource Organization

Naming Convention

{provider}-{region}-{resource}-{env}-{purpose}

Examples:
- az-we-rg-dev-main (Resource Group)
- azwesadevdata (Storage Account)
- az-we-kv-dev-main (Key Vault)
- az-we-aks-dev-main (AKS Cluster)

Tagging Strategy

Required tags for all resources:

• Environment: dev, stage, prod
• Project: the-order
• Region: westeurope, northeurope, etc.
• ManagedBy: terraform
• CostCenter: engineering
• Owner: platform-team
• DataClassification: public, internal, confidential, restricted
• Compliance: gdpr, eidas, regional

Deployment Strategy

Phase 1: Foundation (Weeks 1-2)

• Management group hierarchy
• Identity and access management
• Core networking (hub networks)
• Key Vault setup
• Log Analytics workspaces

Phase 2: Regional Deployment (Weeks 3-6)

• Deploy to primary region (West Europe)
• Deploy to secondary region (North Europe)
• Set up geo-replication
• Configure monitoring

Phase 3: Multi-Region Expansion (Weeks 7-10)

• Deploy to remaining regions
• Configure regional failover
• Set up CDN endpoints
• Implement traffic routing

Phase 4: Workload Migration (Weeks 11-14)

• Migrate applications
• Configure application networking
• Set up application monitoring
• Performance optimization

Phase 5: Optimization (Weeks 15-16)

• Cost optimization
• Performance tuning
• Security hardening
• Documentation and runbooks

Cost Estimation

Per Region (Monthly)

• Networking: $500-1,000
• Compute (AKS): $1,000-3,000
• Storage: $200-500
• Database: $500-2,000
• Monitoring: $200-500
• Security: $300-800
• Backup: $100-300

Total per region: $2,800-8,100/month

Multi-Region (7 regions)

• Development: ~$20,000/month
• Production: ~$50,000/month

Security Considerations

Data Sovereignty

• All data stored within specified regions
• No cross-region data transfer without encryption
• Customer-managed keys for encryption
• Private endpoints for all services

Access Control

• Zero-trust network architecture
• Conditional access policies
• Multi-factor authentication
• Just-in-time access
• Privileged access management

Compliance

• GDPR compliance
• eIDAS compliance
• Regional data protection laws
• Audit logging (90 days retention)
• Data classification and handling

Monitoring and Alerting

Key Metrics

• Resource health
• Cost trends
• Security alerts
• Performance metrics
• Compliance status

Alert Channels

• Email notifications
• Azure Monitor alerts
• Microsoft Teams integration
• PagerDuty (for critical alerts)

Disaster Recovery

RTO/RPO Targets

• RTO: 4 hours
• RPO: 1 hour

DR Strategy

• Primary region: West Europe
• Secondary region: North Europe
• Backup regions: Other regional hubs
• Automated failover for critical services
• Manual failover for non-critical services

Next Steps

1. Review and Approve Architecture
2. Set Up Management Group Hierarchy
3. Deploy Foundation Infrastructure
4. Configure Regional Networks
5. Deploy Regional Resources
6. Set Up Monitoring and Alerting
7. Implement Security Controls
8. Migrate Workloads
9. Optimize and Tune

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Last Updated: 2025-01-27
Next Review: After Phase 1 completion