# Cloud Infrastructure Management Platform
## Software Design Specification (SDS)
**Version: 1.0 (V1 – Enterprise Foundation)**

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## 1. Architectural Overview

The platform adopts a Control Plane and Data Plane architecture.

- Control Plane manages APIs, identity, orchestration, policy, and state.
- Data Plane executes infrastructure operations via agents and providers.

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## 2. High-Level Components

### 2.1 Management Layer
- Tenant Management Console
- Provider / Operations Console

In Version 1, both consoles MAY be implemented as a single UI with strict role-based access control.

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### 2.2 API Gateway
Responsibilities:
- Authentication and authorization
- API namespace separation
- Request validation and rate limiting
- Centralized audit logging hook

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### 2.3 Core Services

| Service | Responsibility |
|-------|----------------|
| Identity Service | Users, roles, RBAC |
| Resource Manager | Projects, quotas, metadata |
| Compute Service | Virtual machine lifecycle |
| Network Service | Virtual network management |
| Storage Service | Volume or object storage |
| Job Service | Workflow orchestration and retries |
| Audit Service | Append-only audit logging |
| Metering Service | Usage aggregation |

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## 3. Data Model Overview

### Core Entities
- Organization
- Project
- User
- Role
- Role Binding
- Virtual Machine
- Network
- Volume / Bucket
- Job
- Audit Event
- Quota
- Provider

### Common Resource Attributes
```
id
organization_id
project_id
name
status
labels
provider_reference
created_at
updated_at
```

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## 4. API Design Principles

- REST-based APIs
- Versioned endpoints
- Clear separation between tenant and provider APIs

### Namespace Examples
- /api/tenant/v1/*
- /api/ops/v1/*
- /api/common/v1/*

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## 5. Job & Workflow Design

### Job Lifecycle States
- PENDING
- RUNNING
- SUCCEEDED
- FAILED
- RETRYING

### Design Characteristics
- Idempotent create operations
- Retry for transient failures only
- Persistent job state storage

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## 6. Provider & Agent Architecture

### Provider Interfaces
- Compute Provider
- Network Provider
- Storage Provider

### Agent Responsibilities
- Execute infrastructure-level operations
- Report actual state to the control plane
- Emit audit and telemetry data

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## 7. Reconciliation Mechanism

- Periodic reconciliation loop
- Desired state vs actual state comparison
- Drift handling via:
  - Automated correction
  - Operator alert and incident escalation

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## 8. Security Architecture

- Token-based authentication
- RBAC enforcement across services
- Encrypted secret storage
- Distributed request tracing

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## 9. Deployment Model (V1)

- Stateless API services
- PostgreSQL as primary datastore
- Message queue for job distribution
- Agent deployment per infrastructure cluster

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## 10. Future Evolution

- Multi-cluster federation
- Kubernetes services
- Policy-as-Code
- Billing and invoicing
- Application marketplace

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