pos-system/docs/en/architecture/iam-proposal.md

Đề Xuất Kiến Trúc IAM Service

Tài liệu này mô tả đề xuất kiến trúc cho IAM Service (Identity and Access Management Service), mở rộng từ auth-service hiện tại.

Tổng Quan: Auth Service → IAM Service

Auth Service hiện tại tập trung vào:

• Authentication (xác thực)
• Authorization (phân quyền)
• Session & Token management
• RBAC/ABAC

IAM Service mở rộng thêm:

• Identity Management (quản lý danh tính toàn diện)
• Access Governance (quản trị truy cập)
• Compliance & Reporting (tuân thủ và báo cáo)
• Lifecycle Management (quản lý vòng đời tài khoản)

---

1. Phạm Vi IAM Service

1.1 Identity Management (Quản Lý Danh Tính)

A. User Lifecycle Management

• User CRUD operations
• User provisioning/deprovisioning workflows
• Bulk user operations (import/export)
• User deactivation/reactivation với approval workflow
• Account merging/deduplication
• User archival (soft delete với retention policy)

B. Profile Management

• Extended attributes (custom fields)
• Profile picture upload & management
• Contact information (phone, address)
• Preferences & settings
• Profile versioning/audit trail

C. Identity Verification

• Email verification
• Phone/SMS verification
• Identity document verification (KYC)
• Multi-level verification (verified, pending, rejected)

D. Organizations & Groups

• Organization management (multi-tenant)
• Group/Team management
• Organization hierarchy
• Group-based access control
• Organization-level policies

1.2 Access Management (Quản Lý Truy Cập)

A. Advanced Access Control

• Just-In-Time (JIT) access provisioning
• Privileged Access Management (PAM)
• Temporary access grants
• Access request/approval workflows
• Delegation & impersonation (admin view)
• Conditional access policies (location, time, device)

B. Access Reviews & Certifications

• Periodic access reviews
• Access certification campaigns
• Access analytics & reporting
• Risk scoring for access decisions
• Anomaly detection (unusual access patterns)

1.3 Governance & Compliance (Quản Trị & Tuân Thủ)

A. Audit & Logging

• Compliance reporting (GDPR, SOC2, ISO 27001)
• Data retention policies
• Audit log search & analytics
• Export audit logs

B. Policy Governance

• Policy versioning & rollback
• Policy templates library
• Policy testing & validation
• Policy compliance checks

C. Risk Management

• Risk scoring engine
• Risk-based authentication
• Threat detection
• Incident response workflows
• Security posture dashboard

---

2. Kiến Trúc Module Structure

services/iam-service/
├── src/
│   ├── config/              # Configuration files
│   ├── core/
│   │   ├── cache/           # Multi-layer cache
│   │   ├── security/        # Zero-trust, encryption
│   │   ├── events/          # Event sourcing
│   │   └── workflows/       # Workflow engine (NEW)
│   ├── modules/
│   │   ├── auth/            # ✅ Core authentication
│   │   ├── rbac/            # ✅ RBAC system
│   │   ├── social/          # ✅ Social authentication
│   │   ├── oidc/            # ✅ OIDC implementation
│   │   ├── token/           # ✅ JWT & Cookie management
│   │   ├── session/         # ✅ Session management
│   │   ├── mfa/             # ✅ Multi-factor auth
│   │   │
│   │   ├── identity/        # 🆕 Identity Management
│   │   │   ├── user/        # User lifecycle
│   │   │   ├── profile/     # Profile management
│   │   │   ├── verification/ # Identity verification
│   │   │   └── organization/ # Organizations & groups
│   │   │
│   │   ├── access/          # 🆕 Access Management
│   │   │   ├── request/     # Access requests
│   │   │   ├── review/      # Access reviews
│   │   │   ├── pam/         # Privileged access
│   │   │   └── analytics/   # Access analytics
│   │   │
│   │   ├── governance/      # 🆕 Governance & Compliance
│   │   │   ├── compliance/  # Compliance reporting
│   │   │   ├── policy/      # Policy governance
│   │   │   ├── risk/        # Risk management
│   │   │   └── reporting/   # Reporting & dashboards
│   │   │
│   │   └── workflow/        # 🆕 Workflow Engine
│   │       ├── engine/      # Workflow engine
│   │       ├── approval/    # Approval workflows
│   │       └── automation/  # Automated workflows
│   │
│   ├── middlewares/         # Express middlewares
│   ├── repositories/        # Data access layer
│   └── routes/              # Route definitions
└── prisma/
    └── schema.prisma        # Database schema (mở rộng)

---

3. Database Schema Mở Rộng

3.1 Identity Management Models

• Organization: Quản lý tổ chức với hierarchy
• Group: Quản lý nhóm trong organization
• GroupMember: Thành viên của group
• GroupPermission: Permissions cho group
• UserProfile: Thông tin profile mở rộng của user
• IdentityVerification: Xác thực danh tính (email, phone, document)

3.2 Access Management Models

• AccessRequest: Yêu cầu truy cập
• AccessRequestApprover: Người phê duyệt request
• AccessReview: Đánh giá truy cập định kỳ
• AccessReviewItem: Item trong review

3.3 Governance Models

• ComplianceReport: Báo cáo tuân thủ (GDPR, SOC2, ISO27001)
• PolicyTemplate: Template cho policies
• RiskScore: Điểm rủi ro của user

---

4. API Endpoints Mở Rộng

4.1 Identity Management APIs

# User Management
GET    /api/v1/identity/users
POST   /api/v1/identity/users
GET    /api/v1/identity/users/:id
PUT    /api/v1/identity/users/:id
DELETE /api/v1/identity/users/:id
POST   /api/v1/identity/users/bulk-import
GET    /api/v1/identity/users/bulk-export

# Profile Management
GET    /api/v1/identity/users/:id/profile
PUT    /api/v1/identity/users/:id/profile
POST   /api/v1/identity/users/:id/profile/avatar

# Identity Verification
POST   /api/v1/identity/verification/email/request
POST   /api/v1/identity/verification/email/verify
POST   /api/v1/identity/verification/phone/request
POST   /api/v1/identity/verification/phone/verify

# Organizations & Groups
GET    /api/v1/identity/organizations
POST   /api/v1/identity/organizations
GET    /api/v1/identity/organizations/:id/groups
POST   /api/v1/identity/organizations/:id/groups
GET    /api/v1/identity/groups/:id/members
POST   /api/v1/identity/groups/:id/members

4.2 Access Management APIs

# Access Requests
GET    /api/v1/access/requests
POST   /api/v1/access/requests
PUT    /api/v1/access/requests/:id/approve
PUT    /api/v1/access/requests/:id/reject

# Access Reviews
GET    /api/v1/access/reviews
POST   /api/v1/access/reviews
POST   /api/v1/access/reviews/:id/start
POST   /api/v1/access/reviews/:id/complete
GET    /api/v1/access/reviews/:id/items

# Access Analytics
GET    /api/v1/access/analytics/usage
GET    /api/v1/access/analytics/permissions
GET    /api/v1/access/analytics/risks

4.3 Governance APIs

# Compliance Reports
GET    /api/v1/governance/compliance/reports
POST   /api/v1/governance/compliance/reports/generate
GET    /api/v1/governance/compliance/reports/:id/export

# Policy Governance
GET    /api/v1/governance/policies/templates
POST   /api/v1/governance/policies/templates
GET    /api/v1/governance/policies/:id/versions
POST   /api/v1/governance/policies/:id/test

# Risk Management
GET    /api/v1/governance/risk/scores
GET    /api/v1/governance/risk/scores/:userId
POST   /api/v1/governance/risk/calculate

# Reporting
GET    /api/v1/governance/reports/access-summary
GET    /api/v1/governance/reports/user-activity
GET    /api/v1/governance/reports/security-events

---

5. Implementation Roadmap

Phase 1: Foundation (Weeks 1-4)

• ✅ Migrate từ auth-service sang iam-service
• 🔄 Tổ chức lại modules theo IAM structure
• 🔄 Mở rộng database schema với identity models
• 🔄 Implement User Profile module

Phase 2: Identity Management (Weeks 5-8)

• 🔄 User lifecycle management
• 🔄 Identity verification (email, phone, document)
• 🔄 Organization & Group management
• 🔄 Profile management with extended attributes

Phase 3: Access Management (Weeks 9-12)

• 🔄 Access request/approval workflows
• 🔄 Access review & certification system
• 🔄 Access analytics
• 🔄 Privileged Access Management (PAM)

Phase 4: Governance (Weeks 13-16)

• 🔄 Compliance reporting engine
• 🔄 Policy governance & versioning
• 🔄 Risk scoring & management
• 🔄 Reporting dashboards

Phase 5: Advanced Features (Weeks 17-20)

• 🔄 Workflow engine
• 🔄 Advanced analytics & ML-based insights
• 🔄 Integration APIs (SCIM, LDAP sync)
• 🔄 Performance optimization & scaling

---

6. Lợi Ích Của IAM Service

6.1 Cho Doanh Nghiệp

• ✅ Tuân thủ (GDPR, SOC2, ISO 27001)
• ✅ Quản lý rủi ro bảo mật tốt hơn
• ✅ Tự động hóa quy trình quản lý truy cập
• ✅ Báo cáo và audit trail đầy đủ
• ✅ Hỗ trợ multi-tenant/organization

6.2 Cho Developers

• ✅ API thống nhất cho identity & access
• ✅ Workflow engine linh hoạt
• ✅ Extensible architecture
• ✅ Comprehensive documentation
• ✅ SDK support

6.3 Cho End Users

• ✅ Self-service profile management
• ✅ Transparent access requests
• ✅ Better user experience
• ✅ Enhanced security với MFA & verification

---

7. Migration Strategy

Từ Auth Service → IAM Service

1. Rename Service: services/auth-service → services/iam-service
2. Update Package Name: @goodgo/auth-service → @goodgo/iam-service
3. Update Routes:
   • Giữ backward compatibility với /api/v1/auth/*
   • Thêm routes mới cho /api/v1/identity/*, /api/v1/access/*, /api/v1/governance/*
4. Database Migration:
   • Thêm schema mới cho identity, access, governance
   • Giữ nguyên các tables hiện có (backward compatible)
5. Gradual Rollout:
   • Phase 1: Deploy cùng auth-service (dual deployment)
   • Phase 2: Migrate clients dần dần
   • Phase 3: Deprecate auth-service khi migration hoàn tất

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Kết Luận

Đề xuất này mở rộng auth-service thành IAM Service với đầy đủ các tính năng:

• Identity Management đầy đủ
• Access Management nâng cao
• Governance & Compliance toàn diện
• Workflow automation linh hoạt

Điều này biến service từ authentication/authorization cơ bản thành một IAM platform toàn diện, phù hợp cho enterprise.