AWS 帳戶 使用 AFT 自動化新 的 Amazon VPC IPAM IPv4 CIDR 配置

使用 AWS Organizations 管理帳戶，在 https：//https://console.aws.amazon.com/ipam/ 開啟 IPAM 主控台。

在 中 AWS 管理主控台，選擇您要在 AWS 區域 其中使用 IPAM 的 。

在導覽窗格中，選擇 Organization settings (組織設定)。

選擇委派。委派選項只有在您以 AWS Organizations 管理帳戶身分登入 主控台時才能使用。

輸入 IPAM 帳戶的 AWS 帳戶 ID。IPAM 管理員必須位於 AWS Organizations 成員帳戶中。

選擇儲存變更。

執行下列命令：

# Navigate to the IPAM module
cd ipam/terraform

# Initiate the IPAM module
terraform init

開啟 main.tf 檔案，依照下列註解所述修改程式碼，然後儲存檔案。

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">= 5.11.0, < 6.0.0"
    }
  }
}

provider "aws" {
  region = "us-east-1" # Replace with the region to create your top-level pool
}

module "ipam" {
  source  = "aws-ia/ipam/aws"
  version = ">= 2.1.0"

  top_name = "my-top-level-pool" # Replace with your desired top-level pool name
  top_description = "top-level pool" # Replace with your desired top-level level pool description
  top_cidr = ["10.0.0.0/16"] # Replace with your desired top-level pool CIDR

  pool_configurations = {
    my-regional-pool = { # (Optional) Replace with a different resource name
      name             = "my-regional-pool" # Replace with your desired pool name
      description      = "regional pool" # Replace with your desired pool description
      cidr             = ["10.0.0.0/23"] # Replace with your desired pool CIDR
      locale           = "us-east-1" # Replace with your desired pool locale
      ram_share_principals = ["arn:aws:organizations::012345678901:ou/ou-ab1c2de345/ou-ab1c2de345"] # Replace with your desired principal ARN to share with via Resource Access Manager (RAM)
    }
  }
}

output "my_regional_pool_id" {
  description = "The ID of the regional pool"
  value       = module.ipam.pools_level_1["my-regional-pool"].id # Replace with your desired resource name if changed above
}

# Create the IPAM top-level and resource pool
terraform apply

在 terraform目錄中建立新的aft-providers.jinja檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

provider "aws" {
  region = "{{ provider_region }}"
  assume_role {
    role_arn    = "{{ target_admin_role_arn }}"
  }
  default_tags {
    tags = {
      managed_by                  = "AFT"
    }
  }
}

在 terraform目錄中建立新的backend.jinja檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

## Auto generated backend.tf ##
## Updated on: {{ timestamp }} ##

{% if tf_distribution_type == "oss" -%}
terraform {
  required_version = ">= {{ tf_version }}"
  backend "s3" {
    region         = "{{ region }}"
    bucket         = "{{ bucket }}"
    key            = "{{ key }}"
    dynamodb_table = "{{ dynamodb_table }}"
    encrypt        = "true"
    kms_key_id     = "{{ kms_key_id }}"
    role_arn       = "{{ aft_admin_role_arn }}"
  }
}
{% else -%}
terraform {
    backend "remote" {
        organization = "{{ terraform_org_name }}"
        workspaces {
        name = "{{ terraform_workspace_name }}"
        }
    }
}
{% endif %}

在 terraform目錄中建立新的main.tf檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

# Define data sources
data "aws_ssm_parameter" "vpc_ipam_id" {
  name = "/aft/account-request/custom-fields/vpc-ipam-id" # Value is defined in the account-request.tf file
}

data "aws_ssm_parameter" "vpc_netmask" {
  name = "/aft/account-request/custom-fields/vpc-ipam-netmask" # Value is defined in the account-request.tf file
}

# Create new VPC
resource "aws_vpc" "vpc1" {

  ipv4_ipam_pool_id   = data.aws_ssm_parameter.vpc_ipam_id.value # Retrieved from SSM - this is how we integrate with IPAM
  ipv4_netmask_length = data.aws_ssm_parameter.vpc_netmask.value # Retrieved from SSM

  assign_generated_ipv6_cidr_block     = var.enable_ipv6 ? true : null
  ipv6_cidr_block                      = var.ipv6_cidr
  ipv6_ipam_pool_id                    = var.ipv6_ipam_pool_id
  ipv6_netmask_length                  = var.ipv6_netmask_length
  ipv6_cidr_block_network_border_group = var.ipv6_cidr_block_network_border_group

  instance_tenancy                     = var.instance_tenancy
  enable_dns_hostnames                 = var.enable_dns_hostnames
  enable_dns_support                   = var.enable_dns_support
  enable_network_address_usage_metrics = var.enable_network_address_usage_metrics

  tags = var.tags

  lifecycle {
    ignore_changes = [
      tags, # Any changes made to VPC tags after creation will not be overwritten - remove to revert these changes during future 'terraform apply' operations
    ]
  }
}

在 terraform目錄中建立新的variables.tf檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

# Copied from AWS VPC module
# https://github.com/terraform-aws-modules/terraform-aws-vpc/blob/master/variables.tf

variable "name" {
  description = "Name to be used on all the resources as identifier"
  type        = string
  default     = ""
}

variable "enable_ipv6" {
  description = "Requests an Amazon-provided IPv6 CIDR block with a /56 prefix length for the VPC. You cannot specify the range of IP addresses, or the size of the CIDR block"
  type        = bool
  default     = false
}

variable "ipv6_cidr" {
  description = "(Optional) IPv6 CIDR block to request from an IPAM Pool. Can be set explicitly or derived from IPAM using `ipv6_netmask_length`"
  type        = string
  default     = null
}

variable "ipv6_ipam_pool_id" {
  description = "(Optional) IPAM Pool ID for a IPv6 pool. Conflicts with `assign_generated_ipv6_cidr_block`"
  type        = string
  default     = null
}

variable "ipv6_netmask_length" {
  description = "(Optional) Netmask length to request from IPAM Pool. Conflicts with `ipv6_cidr_block`. This can be omitted if IPAM pool as a `allocation_default_netmask_length` set. Valid values: `56`"
  type        = number
  default     = null
}

variable "ipv6_cidr_block_network_border_group" {
  description = "By default when an IPv6 CIDR is assigned to a VPC a default ipv6_cidr_block_network_border_group will be set to the region of the VPC. This can be changed to restrict advertisement of public addresses to specific Network Border Groups such as LocalZones"
  type        = string
  default     = null
}

variable "instance_tenancy" {
  description = "A tenancy option for instances launched into the VPC"
  type        = string
  default     = "default"
}

variable "enable_dns_hostnames" {
  description = "Should be true to enable DNS hostnames in the VPC"
  type        = bool
  default     = true
}

variable "enable_dns_support" {
  description = "Should be true to enable DNS support in the VPC"
  type        = bool
  default     = true
}

variable "enable_network_address_usage_metrics" {
  description = "Determines whether network address usage metrics are enabled for the VPC"
  type        = bool
  default     = null
}

variable "tags" {
  description = "A map of tags to add to all resources"
  type        = map(string)
  default     = {}
}

在 terraform目錄中建立新的terraform.tfvars檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

name = "demo-ipam"
enable_ipv6 = false
enable_dns_hostnames = true
enable_dns_support = true

在 terraform目錄中建立新的outputs.tf檔案。

開啟 檔案，新增下列程式碼，然後儲存檔案。

# Output VPC ID and ARN in CodeBuild
output "vpc1" {
  description = "VPC 1 information"
  value = {
    id  = try(aws_vpc.vpc1.id, null)
    arn = try(aws_vpc.vpc1.arn, null)
  }
}

從終端機導覽至 aft-account-request/terraform目錄。

開啟 account-requests.tf 檔案，使用值新增和修改下列程式碼，然後儲存檔案。

module "sandbox_account_01" {
  source = "./modules/aft-account-request"

  control_tower_parameters = {
    AccountEmail = "john.doe@example.com"
    AccountName  = "sandbox-account-01"
    # Syntax for top-level OU
    ManagedOrganizationalUnit = "Sandbox"
    # Syntax for nested OU
    # ManagedOrganizationalUnit = "Sandbox (ou-xfe5-a8hb8ml8)"
    SSOUserEmail     = "john.doe@example.com"
    SSOUserFirstName = "John"
    SSOUserLastName  = "Doe"
  }

  account_tags = {
    "ABC:Owner"       = "john.doe@example.com"
    "ABC:Division"    = "ENT"
    "ABC:Environment" = "Dev"
    "ABC:CostCenter"  = "123456"
    "ABC:Vended"      = "true"
    "ABC:DivCode"     = "102"
    "ABC:BUCode"      = "ABC003"
    "ABC:Project"     = "123456"
  }

  change_management_parameters = {
    change_requested_by = "John Doe"
    change_reason       = "testing the account vending process"
  }

  custom_fields = {
    vpc-ipam-id = "ipam-pool-123456ab789041cd2"
    vpc-ipam-netmask = "24"
 
  }

  account_customizations_name = "APG-AFT-IPAM" # Do not change this value
}

若要將新帳戶遞交至帳戶請求儲存庫，請使用下列命令：

git add .
git commit -m 'requested APG account'
git push origin

開啟 AWS IAM Identity Center 您的登入頁面，並以您在 account-requests.tf 檔案中指定的使用者身分進行驗證。

從 IAM Identity Center 帳戶清單中，選擇您先前提供的帳戶，並使用 AWS AdministratorAccess角色登入。

導覽至 VPC 主控台，然後選取您的 VPCs。

選取您剛建立之 VPC 的 VPC ID。

選擇 CIDRs 索引標籤。您應該會看到 IPAM 配置的 IPv4 CIDR。

（選用） 登入您的 IPAM 委派管理員帳戶，並確認配置顯示在 IPAM 主控台中。