# Phoenix Operating Model - Architecture Diagrams

**Visual representations of the Phoenix operating model architecture**

This document contains mermaid diagrams visualizing the Phoenix operating model, including control planes, entity relationships, access models, promotion flows, and integration patterns.

---

## 1. Control Plane Overview

High-level view of the five orthogonal control planes and their relationships.

```mermaid
graph TB
    subgraph commercial [Commercial Plane]
        Client[Client<br/>Billing Profile]
        Billing[Billing & Invoicing]
        Contracts[Contracts & MSAs]
    end
    
    subgraph tenancy [Tenancy Plane]
        Tenant[Tenant<br/>Domain & Identity]
        Identity[Identity Provider]
        RBAC[RBAC Namespace]
    end
    
    subgraph subscription [Subscription Plane]
        Subscription[Subscription<br/>Service Bundle]
        Quotas[Quotas & Limits]
        Policies[Policy Packs]
    end
    
    subgraph environment [Environment Plane]
        Environment[Environment<br/>Lifecycle Stage]
        Network[Network Isolation]
        Data[Data Isolation]
    end
    
    subgraph content [Content & DevOps Plane]
        Enterprise[Enterprise]
        Portfolio[Portfolio]
        Product[Product]
        Application[Application]
        Component[Component]
    end
    
    Client -->|owns| Tenant
    Tenant -->|contains| Subscription
    Subscription -->|provisions| Environment
    Application -->|deploys to| Environment
    
    Client -.->|billing ID| Subscription
    Tenant -.->|identity ID| Environment
    Subscription -.->|quota ID| Environment
    Application -.->|content ID| Environment
    
    style Client fill:#e1f5ff
    style Tenant fill:#fff4e1
    style Subscription fill:#e8f5e9
    style Environment fill:#fce4ec
    style Enterprise fill:#f3e5f5
```

---

## 2. Entity Relationship Diagram

Complete graph showing the hierarchical relationships between all entities.

```mermaid
erDiagram
    Client ||--o{ Tenant : "owns"
    Tenant ||--o{ Subscription : "contains"
    Subscription ||--o{ Environment : "provisions"
    
    Client {
        string id
        string name
        LegalEntity legalEntity
        Contract contract
        InvoicingConfig invoicingConfig
    }
    
    Tenant {
        string id
        string name
        string[] primaryDomains
        IdentityProvider identityProvider
        string rbacNamespace
        ComplianceProfile complianceProfile
    }
    
    Subscription {
        string id
        string name
        SubscriptionType type
        ServiceBundle[] serviceBundles
        Quotas quotas
        PolicyPack[] policyPacks
    }
    
    Environment {
        string id
        string name
        EnvironmentType type
        NetworkIsolation networkIsolation
        DataIsolation dataIsolation
    }
    
    Enterprise ||--o{ Portfolio : "contains"
    Portfolio ||--o{ Product : "contains"
    Product ||--o{ Application : "contains"
    Application ||--o{ Component : "contains"
    Application ||--o{ GitRepo : "uses"
    
    Enterprise {
        string id
        string name
        Ownership ownership
    }
    
    Portfolio {
        string id
        string name
        Ownership ownership
    }
    
    Product {
        string id
        string name
        Ownership ownership
    }
    
    Application {
        string id
        string name
        Ownership ownership
    }
    
    Component {
        string id
        string name
        ContentType contentType
        string version
    }
    
    Application }o--|| Environment : "deploys to"
```

---

## 3. Multi-Region Landing Zone Architecture

Sovereign cloud deployments per region, landing zones, and cross-region connectivity.

```mermaid
graph TB
    subgraph global [Global Phoenix Platform]
        ControlPlane[Control Plane<br/>Coordinated]
    end
    
    subgraph region1 [Region 1 - Nation A]
        LandingZone1[Landing Zone 1<br/>Sovereign Cloud]
        Tenant1A[Tenant 1A]
        Tenant1B[Tenant 1B]
        Subscription1A[Subscription 1A]
        Environment1A[Environment 1A<br/>PROD]
    end
    
    subgraph region2 [Region 2 - Nation B]
        LandingZone2[Landing Zone 2<br/>Sovereign Cloud]
        Tenant2A[Tenant 2A]
        Subscription2A[Subscription 2A]
        Environment2A[Environment 2A<br/>PROD]
    end
    
    subgraph region3 [Region 3 - Nation C]
        LandingZone3[Landing Zone 3<br/>Sovereign Cloud]
        Tenant3A[Tenant 3A]
        Subscription3A[Subscription 3A]
        Environment3A[Environment 3A<br/>AIR-GAPPED]
    end
    
    ControlPlane -.->|governance| LandingZone1
    ControlPlane -.->|governance| LandingZone2
    ControlPlane -.->|governance| LandingZone3
    
    LandingZone1 --> Tenant1A
    LandingZone1 --> Tenant1B
    Tenant1A --> Subscription1A
    Subscription1A --> Environment1A
    
    LandingZone2 --> Tenant2A
    Tenant2A --> Subscription2A
    Subscription2A --> Environment2A
    
    LandingZone3 --> Tenant3A
    Tenant3A --> Subscription3A
    Subscription3A --> Environment3A
    
    LandingZone1 <-->|cross-region<br/>connectivity| LandingZone2
    LandingZone2 -.->|governance only| LandingZone3
    
    style LandingZone1 fill:#e1f5ff
    style LandingZone2 fill:#e1f5ff
    style LandingZone3 fill:#e1f5ff
    style Environment3A fill:#ffebee
```

---

## 4. Decentralized Control Planes

Distributed governance across regions showing regional autonomy with coordination.

```mermaid
graph TB
    subgraph coordination [Coordination Layer]
        EventBus[Event Bus]
        GovernanceAPI[Governance API]
        AuditLog[Audit Log]
    end
    
    subgraph region1 [Region 1 Control Plane]
        CP1_Commercial[Commercial Plane]
        CP1_Tenancy[Tenancy Plane]
        CP1_Subscription[Subscription Plane]
        CP1_Environment[Environment Plane]
        CP1_Content[Content & DevOps]
    end
    
    subgraph region2 [Region 2 Control Plane]
        CP2_Commercial[Commercial Plane]
        CP2_Tenancy[Tenancy Plane]
        CP2_Subscription[Subscription Plane]
        CP2_Environment[Environment Plane]
        CP2_Content[Content & DevOps]
    end
    
    subgraph region3 [Region 3 Control Plane]
        CP3_Commercial[Commercial Plane]
        CP3_Tenancy[Tenancy Plane]
        CP3_Subscription[Subscription Plane]
        CP3_Environment[Environment Plane]
        CP3_Content[Content & DevOps]
    end
    
    CP1_Commercial <--> EventBus
    CP1_Tenancy <--> EventBus
    CP1_Subscription <--> EventBus
    CP1_Environment <--> EventBus
    CP1_Content <--> EventBus
    
    CP2_Commercial <--> EventBus
    CP2_Tenancy <--> EventBus
    CP2_Subscription <--> EventBus
    CP2_Environment <--> EventBus
    CP2_Content <--> EventBus
    
    CP3_Commercial <--> EventBus
    CP3_Tenancy <--> EventBus
    CP3_Subscription <--> EventBus
    CP3_Environment <--> EventBus
    CP3_Content <--> EventBus
    
    EventBus --> GovernanceAPI
    EventBus --> AuditLog
    
    CP1_Tenancy <-->|federated identity| CP2_Tenancy
    CP2_Tenancy -.->|governance only| CP3_Tenancy
    
    style CP1_Commercial fill:#e1f5ff
    style CP1_Tenancy fill:#fff4e1
    style CP1_Subscription fill:#e8f5e9
    style CP1_Environment fill:#fce4ec
    style CP1_Content fill:#f3e5f5
```

---

## 5. Content Hierarchy

Enterprise content management hierarchy from Enterprise to Component.

```mermaid
graph TD
    Enterprise[Enterprise<br/>Ownership & Governance]
    
    Enterprise --> Portfolio1[Portfolio 1]
    Enterprise --> Portfolio2[Portfolio 2]
    Enterprise --> Portfolio3[Portfolio 3]
    
    Portfolio1 --> Product1A[Product 1A]
    Portfolio1 --> Product1B[Product 1B]
    
    Portfolio2 --> Product2A[Product 2A]
    
    Product1A --> App1A1[Application 1A1]
    Product1A --> App1A2[Application 1A2]
    
    Product1B --> App1B1[Application 1B1]
    
    Product2A --> App2A1[Application 2A1]
    
    App1A1 --> Comp1A1A[Component 1A1A<br/>Source Code]
    App1A1 --> Comp1A1B[Component 1A1B<br/>IaC]
    App1A1 --> Comp1A1C[Component 1A1C<br/>Pipeline]
    
    App1A2 --> Comp1A2A[Component 1A2A<br/>Source Code]
    
    App1B1 --> Comp1B1A[Component 1B1A<br/>Source Code]
    
    App2A1 --> Comp2A1A[Component 2A1A<br/>Source Code]
    App2A1 --> Comp2A1B[Component 2A1B<br/>AI Model]
    
    App1A1 --> GitRepo1[Git Repository 1]
    App1A2 --> GitRepo2[Git Repository 2]
    App1B1 --> GitRepo3[Git Repository 3]
    App2A1 --> GitRepo4[Git Repository 4]
    
    style Enterprise fill:#f3e5f5
    style Portfolio1 fill:#e1bee7
    style Portfolio2 fill:#e1bee7
    style Portfolio3 fill:#e1bee7
    style Product1A fill:#ce93d8
    style App1A1 fill:#ba68c8
    style Comp1A1A fill:#ab47bc
```

---

## 6. Access Model (RBAC)

RBAC roles across planes with regional scope and cross-plane delegation.

```mermaid
graph TB
    subgraph commercialRoles [Commercial Plane Roles]
        FinanceAdmin[Finance Admin]
        BillingViewer[Billing Viewer]
        CostCenterOwner[Cost Center Owner]
    end
    
    subgraph tenancyRoles [Tenancy Plane Roles]
        TenantOwner[Tenant Owner]
        SecurityAdmin[Security Admin]
        IdentityAdmin[Identity Admin]
        ComplianceOfficer[Compliance Officer]
    end
    
    subgraph subscriptionRoles [Subscription Plane Roles]
        SubscriptionOwner[Subscription Owner]
        PlatformAdmin[Platform Admin]
        ServiceOperator[Service Operator]
        Auditor[Read-only Auditor]
    end
    
    subgraph environmentRoles [Environment Plane Roles]
        EnvOwner[Environment Owner]
        ReleaseManager[Release Manager]
        Operator[Operator]
        Observer[Observer]
    end
    
    subgraph contentRoles [Content & DevOps Roles]
        EnterpriseArch[Enterprise Architect]
        PortfolioLead[Portfolio Lead]
        ProductOwner[Product Owner]
        DevLead[Dev Lead]
        Contributor[Contributor]
        Reviewer[Reviewer]
        ReleaseApprover[Release Approver]
    end
    
    FinanceAdmin -.->|delegation| TenantOwner
    TenantOwner -.->|delegation| SubscriptionOwner
    SubscriptionOwner -.->|delegation| EnvOwner
    EnvOwner -.->|delegation| ReleaseManager
    ReleaseManager -.->|delegation| ReleaseApprover
    
    TenantOwner -->|manages| IdentityAdmin
    TenantOwner -->|manages| SecurityAdmin
    SubscriptionOwner -->|manages| PlatformAdmin
    EnvOwner -->|manages| Operator
    
    style FinanceAdmin fill:#e1f5ff
    style TenantOwner fill:#fff4e1
    style SubscriptionOwner fill:#e8f5e9
    style EnvOwner fill:#fce4ec
    style EnterpriseArch fill:#f3e5f5
```

---

## 7. Promotion Flow

Code commit through CI/CD to deployment with policy gates and authorization.

```mermaid
sequenceDiagram
    participant Dev as Developer
    participant Git as Git Repository
    participant CI as CI Pipeline
    participant Artifact as Artifact Registry
    participant Policy as Policy Engine
    participant Approval as Approval Workflow
    participant Env as Environment
    participant Sub as Subscription
    
    Dev->>Git: Commit Code
    Git->>CI: Trigger CI Pipeline
    
    CI->>CI: Run Tests
    CI->>CI: Security Scan
    CI->>CI: Build Artifact
    
    alt Tests Pass
        CI->>Artifact: Store Artifact
        Artifact->>Policy: Validate Policies
        
        alt Policy Validation Pass
            Policy->>Approval: Check Approval Required
            
            alt Approval Required
                Approval->>Approval: Request Approval
                Approval->>Approval: Wait for Approval
                
                alt Approval Granted
                    Approval->>Sub: Verify Subscription Authorization
                    Sub->>Env: Authorize Deployment
                    Env->>Env: Deploy to Environment
                else Approval Denied
                    Approval->>Dev: Reject Deployment
                end
            else No Approval Required
                Approval->>Sub: Verify Subscription Authorization
                Sub->>Env: Authorize Deployment
                Env->>Env: Deploy to Environment
            end
        else Policy Validation Fail
            Policy->>Dev: Reject - Policy Violation
        end
    else Tests Fail
        CI->>Dev: Reject - Tests Failed
    end
```

---

## 8. Integration Architecture

How control planes interact with existing infrastructure systems.

```mermaid
graph TB
    subgraph planes [Phoenix Control Planes]
        Commercial[Commercial Plane]
        Tenancy[Tenancy Plane]
        Subscription[Subscription Plane]
        Environment[Environment Plane]
        Content[Content & DevOps Plane]
    end
    
    subgraph infrastructure [Existing Infrastructure]
        Proxmox[Proxmox<br/>Compute & Storage]
        Kubernetes[Kubernetes<br/>Container Orchestration]
        Cloudflare[Cloudflare<br/>Zero Trust & Tunnels]
        Keycloak[Keycloak<br/>Identity Management]
        ArgoCD[ArgoCD<br/>GitOps]
        Crossplane[Crossplane<br/>Infrastructure as Code]
        Monitoring[Monitoring & Observability]
    end
    
    Commercial -->|billing data| Monitoring
    Tenancy -->|identity config| Keycloak
    Tenancy -->|access policies| Cloudflare
    Subscription -->|resource quotas| Kubernetes
    Subscription -->|infrastructure| Crossplane
    Environment -->|deployment| ArgoCD
    Environment -->|compute resources| Proxmox
    Environment -->|container workloads| Kubernetes
    Content -->|Git repos| ArgoCD
    Content -->|IaC| Crossplane
    
    Keycloak -->|identity| Cloudflare
    ArgoCD -->|syncs| Kubernetes
    Crossplane -->|provisions| Proxmox
    Crossplane -->|provisions| Kubernetes
    
    style Commercial fill:#e1f5ff
    style Tenancy fill:#fff4e1
    style Subscription fill:#e8f5e9
    style Environment fill:#fce4ec
    style Content fill:#f3e5f5
```

---

## 9. Sovereign Environment Isolation

REGULATED, SOVEREIGN, and AIR-GAPPED environments per region.

```mermaid
graph TB
    subgraph standard [Standard Environments]
        DEV[DEV<br/>Development]
        INT[INT<br/>Integration]
        UAT[UAT<br/>User Acceptance]
        STAGING[STAGING<br/>Pre-Production]
        PROD[PROD<br/>Production]
    end
    
    subgraph specialized [Specialized Environments]
        REGULATED[REGULATED<br/>Compliance Required]
        SOVEREIGN[SOVEREIGN<br/>Data Residency]
        AIRGAPPED[AIR-GAPPED<br/>No External Connectivity]
    end
    
    subgraph isolation [Isolation Levels]
        NetworkIsolation[Network Isolation]
        DataIsolation[Data Isolation]
        AccessIsolation[Access Isolation]
        ComplianceIsolation[Compliance Isolation]
    end
    
    DEV --> NetworkIsolation
    INT --> NetworkIsolation
    UAT --> NetworkIsolation
    STAGING --> NetworkIsolation
    PROD --> NetworkIsolation
    PROD --> DataIsolation
    PROD --> AccessIsolation
    
    REGULATED --> NetworkIsolation
    REGULATED --> DataIsolation
    REGULATED --> AccessIsolation
    REGULATED --> ComplianceIsolation
    
    SOVEREIGN --> NetworkIsolation
    SOVEREIGN --> DataIsolation
    SOVEREIGN --> AccessIsolation
    SOVEREIGN --> ComplianceIsolation
    SOVEREIGN -->|regional| DataResidency[Regional Data Residency]
    
    AIRGAPPED --> NetworkIsolation
    AIRGAPPED --> DataIsolation
    AIRGAPPED --> AccessIsolation
    AIRGAPPED --> ComplianceIsolation
    AIRGAPPED -->|complete| NoExternalConnectivity[No External Connectivity]
    
    style PROD fill:#ffebee
    style REGULATED fill:#fff3e0
    style SOVEREIGN fill:#e8f5e9
    style AIRGAPPED fill:#fce4ec
```

---

## 10. Multi-National Tenant Structure

How international sovereign governments are modeled with tenants.

```mermaid
graph TB
    subgraph client [Client: International Government]
        ClientEntity[Government Entity<br/>Legal & Billing]
    end
    
    subgraph nation1 [Nation A]
        Tenant1A[Tenant 1A<br/>Domain: nation-a.gov]
        Subscription1A[Subscription 1A<br/>Product]
        Environment1A[Environment 1A<br/>PROD]
        LandingZone1[Landing Zone 1<br/>Sovereign Cloud]
    end
    
    subgraph nation2 [Nation B]
        Tenant2A[Tenant 2A<br/>Domain: nation-b.gov]
        Subscription2A[Subscription 2A<br/>Product]
        Environment2A[Environment 2A<br/>PROD]
        LandingZone2[Landing Zone 2<br/>Sovereign Cloud]
    end
    
    subgraph nation3 [Nation C]
        Tenant3A[Tenant 3A<br/>Domain: nation-c.gov]
        Subscription3A[Subscription 3A<br/>Classified]
        Environment3A[Environment 3A<br/>AIR-GAPPED]
        LandingZone3[Landing Zone 3<br/>Air-Gapped Cloud]
    end
    
    ClientEntity -->|owns| Tenant1A
    ClientEntity -->|owns| Tenant2A
    ClientEntity -->|owns| Tenant3A
    
    Tenant1A --> Subscription1A
    Subscription1A --> Environment1A
    Environment1A --> LandingZone1
    
    Tenant2A --> Subscription2A
    Subscription2A --> Environment2A
    Environment2A --> LandingZone2
    
    Tenant3A --> Subscription3A
    Subscription3A --> Environment3A
    Environment3A --> LandingZone3
    
    Tenant1A <-->|federated identity| Tenant2A
    Tenant2A -.->|governance only| Tenant3A
    
    LandingZone1 <-->|cross-region<br/>connectivity| LandingZone2
    LandingZone2 -.->|no connectivity| LandingZone3
    
    style ClientEntity fill:#e1f5ff
    style Tenant1A fill:#fff4e1
    style Tenant2A fill:#fff4e1
    style Tenant3A fill:#fff4e1
    style LandingZone3 fill:#ffebee
```

---

## 11. Landing Zone Patterns

Regional sovereign cloud deployments with different patterns.

```mermaid
graph TB
    subgraph pattern1 [Pattern 1: Single Region Sovereign]
        LZ1[Landing Zone 1<br/>Region A]
        T1[Tenant 1]
        S1[Subscription 1]
        E1[Environment 1<br/>PROD]
    end
    
    subgraph pattern2 [Pattern 2: Multi-Region Sovereign]
        LZ2A[Landing Zone 2A<br/>Region A]
        LZ2B[Landing Zone 2B<br/>Region B]
        T2[Tenant 2<br/>Multi-Region]
        S2A[Subscription 2A<br/>Region A]
        S2B[Subscription 2B<br/>Region B]
        E2A[Environment 2A<br/>PROD]
        E2B[Environment 2B<br/>PROD]
    end
    
    subgraph pattern3 [Pattern 3: Air-Gapped Sovereign]
        LZ3[Landing Zone 3<br/>Region C<br/>Air-Gapped]
        T3[Tenant 3]
        S3[Subscription 3<br/>Classified]
        E3[Environment 3<br/>AIR-GAPPED]
    end
    
    LZ1 --> T1
    T1 --> S1
    S1 --> E1
    
    LZ2A --> T2
    LZ2B --> T2
    T2 --> S2A
    T2 --> S2B
    S2A --> E2A
    S2B --> E2B
    LZ2A <-->|cross-region| LZ2B
    
    LZ3 --> T3
    T3 --> S3
    S3 --> E3
    
    style LZ1 fill:#e1f5ff
    style LZ2A fill:#e1f5ff
    style LZ2B fill:#e1f5ff
    style LZ3 fill:#ffebee
```

---

## 12. Competitive Architecture Comparison

Phoenix vs Azure vs AWS showing decentralized vs centralized models.

```mermaid
graph TB
    subgraph phoenix [Phoenix - Decentralized]
        P_Control[Distributed Control Planes]
        P_Client[Client]
        P_Tenant[Tenant]
        P_Sub[Subscription]
        P_Env[Environment]
        P_LandingZone[Landing Zone<br/>Sovereign Cloud]
    end
    
    subgraph azure [Azure - Centralized]
        A_Control[Centralized Control Plane]
        A_Tenant[Azure AD Tenant]
        A_Sub[Azure Subscription]
        A_RG[Resource Group]
        A_Region[Azure Region]
    end
    
    subgraph aws [AWS - Centralized]
        A_Control2[Centralized Control Plane]
        A_Org[AWS Organization]
        A_Account[AWS Account]
        A_Region2[AWS Region]
    end
    
    P_Control --> P_Client
    P_Client --> P_Tenant
    P_Tenant --> P_Sub
    P_Sub --> P_Env
    P_Env --> P_LandingZone
    
    A_Control --> A_Tenant
    A_Tenant --> A_Sub
    A_Sub --> A_RG
    A_RG --> A_Region
    
    A_Control2 --> A_Org
    A_Org --> A_Account
    A_Account --> A_Region2
    
    style P_Control fill:#e8f5e9
    style P_LandingZone fill:#c8e6c9
    style A_Control fill:#ffebee
    style A_Control2 fill:#ffebee
```

---

## 13. Data Flow - Cross-Plane Operations

Data flow showing how operations span multiple control planes.

```mermaid
sequenceDiagram
    participant User
    participant Commercial as Commercial Plane
    participant Tenancy as Tenancy Plane
    participant Subscription as Subscription Plane
    participant Environment as Environment Plane
    participant Content as Content & DevOps Plane
    participant Infrastructure as Infrastructure
    
    User->>Tenancy: Authenticate (Identity)
    Tenancy->>Tenancy: Validate Identity
    Tenancy->>User: Return Tenant Context
    
    User->>Commercial: Request Billing Data
    Commercial->>Commercial: Get Client for Tenant
    Commercial->>Commercial: Aggregate Billing
    Commercial->>User: Return Billing Data
    
    User->>Subscription: Request Resource Provisioning
    Subscription->>Tenancy: Verify Tenant Authorization
    Subscription->>Commercial: Verify Billing Profile
    Subscription->>Subscription: Check Quotas
    Subscription->>Environment: Provision Environment
    Environment->>Infrastructure: Deploy Resources
    Infrastructure->>Environment: Confirm Deployment
    Environment->>Subscription: Update Status
    Subscription->>User: Confirm Provisioning
    
    User->>Content: Deploy Application
    Content->>Content: Build from Git
    Content->>Environment: Request Deployment
    Environment->>Subscription: Verify Authorization
    Subscription->>Environment: Authorize Deployment
    Environment->>Infrastructure: Deploy Application
    Infrastructure->>Environment: Confirm Deployment
    Environment->>Content: Update Status
    Content->>User: Confirm Deployment
```

---

## 14. Sequence Diagram - Promotion Flow with Authorization

Detailed sequence diagram showing promotion flow with all authorization gates.

```mermaid
sequenceDiagram
    participant Dev as Developer
    participant Git as Git Repository
    participant CI as CI Pipeline
    participant Artifact as Artifact Registry
    participant Policy as Policy Engine
    participant Approval as Approval Workflow
    participant Subscription as Subscription Plane
    participant Environment as Environment Plane
    participant Infrastructure as Infrastructure
    
    Dev->>Git: Commit Code to Branch
    Git->>CI: Webhook Trigger
    CI->>CI: Checkout Code
    CI->>CI: Run Unit Tests
    CI->>CI: Run Integration Tests
    CI->>CI: Security Scan (SAST)
    CI->>CI: Dependency Scan
    CI->>CI: Build Artifact
    
    alt All Tests Pass
        CI->>Artifact: Store Artifact + Metadata
        Artifact->>Policy: Validate Security Policies
        Artifact->>Policy: Validate Compliance Policies
        Artifact->>Policy: Validate Governance Policies
        
        alt All Policies Pass
            Policy->>Approval: Check Environment Type
            
            alt Environment is PROD or REGULATED
                Approval->>Approval: Require Manual Approval
                Approval->>ReleaseManager: Send Approval Request
                ReleaseManager->>Approval: Review & Approve/Reject
                
                alt Approval Granted
                    Approval->>Subscription: Verify Subscription Authorization
                    Subscription->>Subscription: Check Service Bundles
                    Subscription->>Subscription: Check Quotas
                    Subscription->>Approval: Authorization Granted
                    
                    Approval->>Environment: Request Deployment Authorization
                    Environment->>Environment: Check Deployment Policies
                    Environment->>Environment: Verify Network Isolation
                    Environment->>Environment: Verify Data Isolation
                    Environment->>Approval: Deployment Authorized
                    
                    Approval->>Infrastructure: Deploy to Environment
                    Infrastructure->>Infrastructure: Provision Resources
                    Infrastructure->>Infrastructure: Deploy Application
                    Infrastructure->>Environment: Deployment Complete
                    Environment->>Approval: Confirm Deployment
                    Approval->>Dev: Deployment Successful
                else Approval Denied
                    Approval->>Dev: Deployment Rejected - Approval Denied
                end
            else Environment is DEV or INT
                Approval->>Subscription: Verify Subscription Authorization
                Subscription->>Approval: Authorization Granted
                Approval->>Environment: Request Deployment Authorization
                Environment->>Approval: Deployment Authorized
                Approval->>Infrastructure: Deploy to Environment
                Infrastructure->>Environment: Deployment Complete
                Environment->>Approval: Confirm Deployment
                Approval->>Dev: Deployment Successful
            end
        else Policy Validation Failed
            Policy->>Dev: Deployment Rejected - Policy Violation
        end
    else Tests Failed
        CI->>Dev: Build Failed - Tests Failed
    end
```

---

## 15. Multi-Region Topology

Network and governance topology across multiple regions.

```mermaid
graph TB
    subgraph global [Global Coordination]
        GovernanceAPI[Governance API]
        EventBus[Event Bus]
        AuditLog[Global Audit Log]
    end
    
    subgraph region1 [Region 1 - Nation A]
        LZ1[Landing Zone 1]
        CP1[Control Plane 1]
        Network1[Network 1<br/>10.1.0.0/16]
        Proxmox1[Proxmox Cluster 1]
        K8s1[Kubernetes Cluster 1]
    end
    
    subgraph region2 [Region 2 - Nation B]
        LZ2[Landing Zone 2]
        CP2[Control Plane 2]
        Network2[Network 2<br/>10.2.0.0/16]
        Proxmox2[Proxmox Cluster 2]
        K8s2[Kubernetes Cluster 2]
    end
    
    subgraph region3 [Region 3 - Nation C]
        LZ3[Landing Zone 3<br/>Air-Gapped]
        CP3[Control Plane 3]
        Network3[Network 3<br/>10.3.0.0/16]
        Proxmox3[Proxmox Cluster 3]
        K8s3[Kubernetes Cluster 3]
    end
    
    GovernanceAPI --> CP1
    GovernanceAPI --> CP2
    GovernanceAPI -.->|governance only| CP3
    
    EventBus --> CP1
    EventBus --> CP2
    EventBus -.->|no connectivity| CP3
    
    AuditLog --> CP1
    AuditLog --> CP2
    AuditLog -.->|local only| CP3
    
    CP1 --> LZ1
    CP2 --> LZ2
    CP3 --> LZ3
    
    LZ1 --> Network1
    LZ1 --> Proxmox1
    LZ1 --> K8s1
    
    LZ2 --> Network2
    LZ2 --> Proxmox2
    LZ2 --> K8s2
    
    LZ3 --> Network3
    LZ3 --> Proxmox3
    LZ3 --> K8s3
    
    LZ1 <-->|encrypted tunnel| LZ2
    LZ2 -.->|no connectivity| LZ3
    
    style LZ1 fill:#e1f5ff
    style LZ2 fill:#e1f5ff
    style LZ3 fill:#ffebee
    style CP3 fill:#ffebee
```

---

## Diagram Usage

These diagrams can be used in:
- Architecture presentations
- Technical documentation
- Client proposals
- Implementation guides
- Training materials

All diagrams use mermaid syntax and can be rendered in:
- GitHub/GitLab markdown
- Documentation sites (MkDocs, Docusaurus, etc.)
- Mermaid Live Editor
- VS Code with mermaid extensions

---

**Last Updated**: 2025-01-09  
**Version**: 1.0  
**Status**: Complete Architecture Diagrams