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NTC Organizations

Release Notes Source Code Implementation Blueprint

Description​

NTC Organizations provides a streamlined and scalable solution for managing AWS Organizations, enabling you to efficiently structure and govern multi-account environments. With a focus on security, compliance, and automation, this building block helps you define your organizational units (OUs), enforce Guardrails like Service Control Policies (SCPs) and Resource Control Polices (RCP), and implement foundational guardrails for your AWS accounts.

info

NTC Guardrail Templates provide a set of best practice Service Control Policies (SCPs) and Resource Control Policies (RCP) that can be easily customized and then applied via organization_policies.

info

To configure the Organizational Cloudtrail via organization_trail, an S3 bucket and KMS key is required.

Use NTC Log Archive to provision compliant S3 buckets for storing audit-relevant logs.

warning

Service Control Policies (SCPs) and Resource Control Policies (RCPs) should always be thoroughly tested before they are applied organization-wide to avoid major outages (e.g. apply new policies to test accounts first).

Usage​

Latest Release1.5.0
# --------------------------------------------------------------------------------------------------
# ¦ NTC ORGANIZATIONS
# --------------------------------------------------------------------------------------------------
module "ntc_organizations" {
  source = "github.com/nuvibit-terraform-collection/terraform-aws-ntc-organizations?ref=X.X.X"

  # enable sharing resources within your organization
  enable_ram_sharing_in_organization = true

  # list of services which should be enabled in Organizations
  # https://docs.aws.amazon.com/organizations/latest/userguide/orgs_integrate_services_list.html
  # the following services will be enabled by default, but can be overwritten
  service_access_principals = [
    "account.amazonaws.com",
    "servicequotas.amazonaws.com",
    "cloudtrail.amazonaws.com",
    "securityhub.amazonaws.com",
    "config.amazonaws.com",
    "config-multiaccountsetup.amazonaws.com",
    "guardduty.amazonaws.com",
    "malware-protection.guardduty.amazonaws.com",
    "inspector2.amazonaws.com",
    "access-analyzer.amazonaws.com",
    "sso.amazonaws.com",
    "ipam.amazonaws.com",
  ]

  # list of nested (up to 5 levels) organizational units
  organizational_unit_paths = [
    "/root/core",
    "/root/sandbox",
    "/root/suspended",
    "/root/transitional",
    "/root/workloads",
    "/root/workloads/prod",
    "/root/workloads/dev",
    "/root/workloads/test"
  ]

  # DEPRECATED: use 'organization_policies' instead
  service_control_policies = []

  # apply governance policies across organizational units (OUs) and member accounts
  # there are different types of policies like RESOURCE_CONTROL_POLICY, SERVICE_CONTROL_POLICY, AISERVICES_OPT_OUT_POLICY, BACKUP_POLICY, and TAG_POLICY 
  # https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_policies.html#orgs-policy-types
  organization_policies = [
    # {
    #   policy_name        = "scp_deny_all_outside_eu_regions" 
    #   policy_type        = "SERVICE_CONTROL_POLICY"
    #   target_ou_paths    = ["/root/workloads"]
    #   target_account_ids = []
    #   policy_json        = "INSERT_SCP_JSON"
    # }
    module.ntc_guardrail_templates.service_control_policies["scp_root_ou"],
    module.ntc_guardrail_templates.service_control_policies["scp_suspended_ou"],
    module.ntc_guardrail_templates.service_control_policies["scp_sandbox_ou"],
    module.ntc_guardrail_templates.service_control_policies["scp_workloads_ou"],
    module.ntc_guardrail_templates.resource_control_policies["rcp_enforce_confused_deputy_protection"],
    module.ntc_guardrail_templates.resource_control_policies["rcp_enforce_principal_access_from_organization"],
    module.ntc_guardrail_templates.resource_control_policies["rcp_enforce_secure_transport"],
    module.ntc_guardrail_templates.resource_control_policies["rcp_enforce_s3_encryption_and_tls_version"],
  ]

  # after centralizing root access, you can delete root user credentials from member accounts
  # new accounts you create in Organizations will have no root user credentials by default
  # https://docs.aws.amazon.com/IAM/latest/UserGuide/id_root-enable-root-access.html
  centralize_root_access = {
    enabled = true
    features = [
      # You can delete and audit root credentials of member accounts. You can also allow password recovery for specific member accounts.
      "RootCredentialsManagement",
      # You can take certain root actions in member accounts like deleting misconfigured policies in Amazon SQS or Amazon S3.
      "RootSessions",
    ]
  }

  # 'ntc-log-archive' must be provisioned before creating the organization trail
  organization_trail = {
    kms_key_arn    = local.ntc_parameters["log-archive"]["log_bucket_kms_key_arns"]["org_cloudtrail"]
    s3_bucket_name = local.ntc_parameters["log-archive"]["log_bucket_ids"]["org_cloudtrail"]
    # (optional) log cloudtrail to cloudwatch for real time analysis
    cloud_watch_logs_enable = false
    # cloud_watch_logs_existing   = false
    # cloud_watch_logs_group_name = "organization-trail-logs"
    # cloud_watch_logs_role_name  = "organization-trail-logs"
  }

  # create an organization reader IAM role which can be assumed by specified principals
  organization_reader = {
    enabled = true
    # list of IAM principals which can assume the org_reader role (e.g. account ids)
    allowed_principals = [
      local.ntc_parameters["mgmt-account-factory"]["core_accounts"]["aws-c2-security"],
    ]
    iam_role_name   = "ntc-org-account-reader"
    iam_role_path   = "/"
    iam_policy_name = "ntc-org-account-reader-policy"
  }
}

Requirements​

The following requirements are needed by this module:

  • terraform (>= 1.5.0)

  • aws (>= 5.78)

Providers​

The following providers are used by this module:

  • aws (>= 5.78)

Modules​

The following Modules are called:

org_cloudtrail​

Source: ./modules/cloudtrail

Version:

Resources​

The following resources are used by this module:

Required Inputs​

No required inputs.

Optional Inputs​

The following input variables are optional (have default values):

centralize_root_access​

Description: Manages centralized root access features across AWS member accounts.

Type:

object({
    enabled  = optional(bool, false)
    features = optional(list(string), ["RootCredentialsManagement", "RootSessions"])
  })

Default: {}

enable_ram_sharing_in_organization​

Description: Set to true to enable sharing with your organization without using invitations.

Type: bool

Default: false

enabled_policy_types​

Description: DEPRECATED - policy types will be automatically detected from 'organization_policies'.

Type: list(string)

Default:

[
  "SERVICE_CONTROL_POLICY"
]

organization_policies​

Description: List of organization policies that should be applied to member accounts. Organization policies are inherited to nested OUs from parent OU to child OUs.

Type:

list(object({
    policy_name        = string
    policy_description = optional(string, null)
    policy_type        = string
    target_ou_paths    = optional(list(string), [])
    target_account_ids = optional(list(string), [])
    policy_json        = string
  }))

Default: []

organization_reader​

Description: Create organization reader IAM role which can be assumed by specified principals.

Type:

object({
    enabled            = optional(bool, false)
    allowed_principals = optional(list(string), [])
    iam_role_name      = optional(string, "ntc-org-account-reader")
    iam_role_path      = optional(string, "/") # validation: must end with '/'
    iam_policy_name    = optional(string, "ntc-org-account-reader-policy")
  })

Default: {}

organization_trail​

Description: Create organization cloudtrail by providing s3_bucket_name (log archive) and kms_key_arn (server side encryption).

Type:

object({
    trail_name                  = optional(string, "organization-trail")
    kms_key_arn                 = optional(string, "")
    s3_bucket_name              = optional(string, "")
    s3_key_prefix               = optional(string, null)
    cloud_watch_logs_enable     = optional(bool, false)
    cloud_watch_logs_existing   = optional(bool, false)
    cloud_watch_logs_group_name = optional(string, "organization-trail-logs")
    cloud_watch_logs_role_name  = optional(string, "organization-trail-logs")
  })

Default: {}

organizational_unit_paths​

Description: List of organizational units (OU) that should be added under the root organization path.
The path "/root/infrastructure" will create a new "infrastructure" OU directly under the root organization path.
The path "/root/workloads/prod" will create a new "prod" OU directly under the "workloads" OU path.
https://aws.amazon.com/de/blogs/mt/best-practices-for-organizational-units-with-aws-organizations/

Type: list(string)

Default: []

service_access_principals​

Description: List of AWS service principal names for which you want to enable integration with your organization.
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_integrate_services_list.html

Type: list(string)

Default:

[
  "iam.amazonaws.com",
  "account.amazonaws.com",
  "servicequotas.amazonaws.com",
  "cloudtrail.amazonaws.com",
  "securityhub.amazonaws.com",
  "config.amazonaws.com",
  "config-multiaccountsetup.amazonaws.com",
  "guardduty.amazonaws.com",
  "inspector2.amazonaws.com",
  "macie.amazonaws.com",
  "malware-protection.guardduty.amazonaws.com",
  "access-analyzer.amazonaws.com",
  "sso.amazonaws.com",
  "ipam.amazonaws.com"
]

service_control_policies​

Description: DEPRECATED: use 'organization_policies' instead.

Type:

list(object({
    policy_name        = string
    target_ou_paths    = optional(list(string), [])
    target_account_ids = optional(list(string), [])
    policy_json        = string
  }))

Default: []

Outputs​

The following outputs are exported:

master_account_arn​

Description: ARN of the master account.

master_account_email​

Description: Email address of the master account.

master_account_id​

Description: Identifier of the master account.

org_arn​

Description: ARN of the organization.

org_id​

Description: Identifier of the organization.

org_root_ou_id​

Description: Identifier of the organization root path.

organization_cloudtrail_arn​

Description: ARN of organization cloudtrail.

organizational_unit_ids​

Description: Map of organization unit identifiers by ou path.