PoC Azure Landing Zone II – Management Group 포함 구성

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PoC Azure Landing Zone 수준에서 Management Group 계층까지 포함된 Azure Landing Zone을 Terraform으로 구성하면, 엔터프라이즈 스케일의 기본 거버넌스 체계를 시연할 수 있습니다.

📌 PoC Azure Landing Zone – Management Group 포함 구성

  1. Management Group 계층 구조
    • Platform (공통 네트워크/보안/관리 리소스)
    • LandingZones (업무 워크로드)
    • Sandbox (개발/테스트용)
  2. Subscription 할당 (PoC에서는 실제 Subscription 연결 대신 구조만 정의 가능)
  3. Resource Groups + Network + Monitoring + Security (앞서 만든 리소스)
  4. Policy & RBAC 적용 (예: 태그 강제, 특정 사용자 Owner 권한)

✅ Terraform 예제: PoC Landing Zone with MG

terraform {
  required_version = ">= 1.5.0"

  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 3.100"
    }
  }
}

provider "azurerm" {
  features {}
}

# ======================
# Variables
# ======================
variable "prefix" {
  type        = string
  default     = "poclz"
  description = "Landing Zone prefix"
}

variable "location" {
  type        = string
  default     = "koreacentral"
  description = "Azure region"
}

variable "owner_object_id" {
  type        = string
  description = "RBAC 할당 대상 사용자/그룹의 AAD Object ID"
}

# ======================
# Management Group Hierarchy
# ======================
resource "azurerm_management_group" "platform" {
  display_name = "Platform"
  name         = "${var.prefix}-platform"
}

resource "azurerm_management_group" "landingzones" {
  display_name = "Landing Zones"
  name         = "${var.prefix}-landingzones"
}

resource "azurerm_management_group" "sandbox" {
  display_name = "Sandbox"
  name         = "${var.prefix}-sandbox"
}

# Root 하위에 붙이기
resource "azurerm_management_group" "root" {
  display_name = "Root-LZ"
  name         = "${var.prefix}-root"
}

resource "azurerm_management_group" "platform_child" {
  display_name = "Platform-MG"
  name         = "${var.prefix}-platform-mg"
  parent_management_group_id = azurerm_management_group.root.id
}

resource "azurerm_management_group" "landingzones_child" {
  display_name = "LandingZones-MG"
  name         = "${var.prefix}-landingzones-mg"
  parent_management_group_id = azurerm_management_group.root.id
}

resource "azurerm_management_group" "sandbox_child" {
  display_name = "Sandbox-MG"
  name         = "${var.prefix}-sandbox-mg"
  parent_management_group_id = azurerm_management_group.root.id
}

# ======================
# Resource Groups
# ======================
resource "azurerm_resource_group" "network_rg" {
  name     = "${var.prefix}-network-rg"
  location = var.location
}

resource "azurerm_resource_group" "security_rg" {
  name     = "${var.prefix}-security-rg"
  location = var.location
}

resource "azurerm_resource_group" "management_rg" {
  name     = "${var.prefix}-management-rg"
  location = var.location
}

# ======================
# Networking (Hub VNET + Subnet)
# ======================
resource "azurerm_virtual_network" "hub_vnet" {
  name                = "${var.prefix}-hub-vnet"
  location            = var.location
  resource_group_name = azurerm_resource_group.network_rg.name
  address_space       = ["10.10.0.0/16"]
}

resource "azurerm_subnet" "hub_subnet" {
  name                 = "hub-subnet"
  resource_group_name  = azurerm_resource_group.network_rg.name
  virtual_network_name = azurerm_virtual_network.hub_vnet.name
  address_prefixes     = ["10.10.1.0/24"]
}

# ======================
# Monitoring
# ======================
resource "azurerm_log_analytics_workspace" "log" {
  name                = "${var.prefix}-law"
  location            = var.location
  resource_group_name = azurerm_resource_group.management_rg.name
  sku                 = "PerGB2018"
  retention_in_days   = 30
}

# ======================
# Security Center
# ======================
resource "azurerm_security_center_contact" "security_contact" {
  email               = "security@example.com"
  phone               = "+821012345678"
  alert_notifications = true
  alerts_to_admins    = true
}

# ======================
# Azure Policy (예: 리소스 그룹에 태그 강제)
# ======================
resource "azurerm_policy_definition" "tag_policy" {
  name         = "${var.prefix}-enforce-tag"
  policy_type  = "Custom"
  mode         = "All"
  display_name = "Enforce 'Environment' tag on resource groups"

  policy_rule = <<POLICY
{
  "if": {
    "field": "type",
    "equals": "Microsoft.Resources/subscriptions/resourceGroups"
  },
  "then": {
    "effect": "deny",
    "details": {
      "missingField": "tags['Environment']"
    }
  }
}
POLICY
}

resource "azurerm_policy_assignment" "tag_policy_assignment" {
  name                 = "${var.prefix}-tag-policy-assignment"
  display_name         = "Enforce Environment Tag"
  scope                = azurerm_management_group.landingzones_child.id
  policy_definition_id = azurerm_policy_definition.tag_policy.id
}

# ======================
# RBAC (예: Owner 역할 부여)
# ======================
resource "azurerm_role_assignment" "rg_owner" {
  scope                = azurerm_resource_group.network_rg.id
  role_definition_name = "Owner"
  principal_id         = var.owner_object_id
}

📊 PoC 결과 구조

PoC Azure Landing Zone II – Landing Zone Management Group 포함 구성
  • Management Group 계층
    • Root-LZ
      ├── Platform-MG
      ├── LandingZones-MG
      └── Sandbox-MG
  • Resource Groups
    • poclz-network-rg
    • poclz-security-rg
    • poclz-management-rg
  • Networking
    • Hub VNET (10.10.0.0/16)
    • Subnet (10.10.1.0/24)
  • Governance
    • Policy: LandingZones-MG 아래 모든 RG에 Environment 태그 강제
    • RBAC: 특정 Object ID에 Owner 권한 부여

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