Terraform module to provision Service Control Policies (SCP) for AWS Organizations, Organizational Units, and AWS accounts.

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Introduction

Service Control Policies are configured in YAML configuration files.

We maintain a comprehensive catalog of SCP configurations and welcome contributions via pull request!

The example in this module uses the catalog to provision the SCPs on AWS.

The policies in the catalog/*-templates files require parameters supplied via the parameters input to terraform-yaml-config.

Usage

For a complete example, see examples/complete.

For automated tests of the complete example using bats and Terratest (which tests and deploys the example on Datadog), see test.

  module "yaml_config" {
    source = "cloudposse/config/yaml"
    # Cloud Posse recommends pinning every module to a specific version
    # version     = "x.x.x"

    list_config_local_base_path = path.module
    list_config_paths           = ["catalog/*.yaml"]

    context = module.this.context
  }

  module "yaml_config_with_parameters" {
    source = "cloudposse/config/yaml"
    # Cloud Posse recommends pinning every module to a specific version
    # version     = "x.x.x"

    list_config_local_base_path = path.module
    list_config_paths           = ["https://raw.githubusercontent.com/cloudposse/terraform-aws-service-control-policies/0.12.0/catalog/s3-templates/DenyS3InNonSelectedRegion.yaml"]

    parameters = {
      "s3_regions_lockdown" = "us-*,eu-north-1"
      }

    context = module.this.context
  }

  data "aws_caller_identity" "this" {}

  module "service_control_policies" {
    source = "../../"

    service_control_policy_statements  = concat(module.yaml_config.list_configs, module.yaml_config_with_parameters.list_configs)
    service_control_policy_description = var.service_control_policy_description
    target_id                          = data.aws_caller_identity.this.account_id

    context = module.this.context
  }

Important

In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.

Examples

Review the complete example to see how to use this module.

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name	Version
terraform	>= 1.3
aws	>= 3.0
local	>= 1.3

Providers

Name	Version
aws	>= 3.0

Modules

Name	Source	Version
this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_organizations_policy.this	resource
aws_organizations_policy_attachment.this	resource
aws_iam_policy_document.this	data source

Inputs

Name	Description	Type	Default	Required
additional_tag_map	Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id. This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration.	map(string)	{}	no
attributes	ID element. Additional attributes (e.g. workers or cluster) to add to id, in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiter and treated as a single ID element.	list(string)	[]	no
context	Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value. Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged.	any	{ "additional_tag_map": {}, "attributes": [], "delimiter": null, "descriptor_formats": {}, "enabled": true, "environment": null, "id_length_limit": null, "label_key_case": null, "label_order": [], "label_value_case": null, "labels_as_tags": [ "unset" ], "name": null, "namespace": null, "regex_replace_chars": null, "stage": null, "tags": {}, "tenant": null }	no
delimiter	Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all.	string	null	no
descriptor_formats	Describe additional descriptors to be output in the descriptors output map. Map of maps. Keys are names of descriptors. Values are maps of the form {<br/> format = string<br/> labels = list(string)<br/>} (Type is any so the map values can later be enhanced to provide additional options.) format is a Terraform format string to be passed to the format() function. labels is a list of labels, in order, to pass to format() function. Label values will be normalized before being passed to format() so they will be identical to how they appear in id. Default is {} (descriptors output will be empty).	any	{}	no
enabled	Set to false to prevent the module from creating any resources	bool	null	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	string	null	no
id_length_limit	Limit id to this many characters (minimum 6). Set to 0 for unlimited length. Set to null for keep the existing setting, which defaults to 0. Does not affect id_full.	number	null	no
label_key_case	Controls the letter case of the tags keys (label names) for tags generated by this module. Does not affect keys of tags passed in via the tags input. Possible values: lower, title, upper. Default value: title.	string	null	no
label_order	The order in which the labels (ID elements) appear in the id. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.	list(string)	null	no
label_value_case	Controls the letter case of ID elements (labels) as included in id, set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input. Possible values: lower, title, upper and none (no transformation). Set this to title and set delimiter to "" to yield Pascal Case IDs. Default value: lower.	string	null	no
labels_as_tags	Set of labels (ID elements) to include as tags in the tags output. Default is to include all labels. Tags with empty values will not be included in the tags output. Set to [] to suppress all generated tags. Notes: The value of the name tag, if included, will be the id, not the name. Unlike other null-label inputs, the initial setting of labels_as_tags cannot be changed in later chained modules. Attempts to change it will be silently ignored.	set(string)	[ "default" ]	no
name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag. The "name" tag is set to the full id string. There is no tag with the value of the name input.	string	null	no
namespace	ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique	string	null	no
regex_replace_chars	Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.	string	null	no
service_control_policy_description	Description of the combined Service Control Policy	string	null	no
service_control_policy_statements	List of Service Control Policy statements	any	n/a	yes
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	string	null	no
tags	Additional tags (e.g. {'BusinessUnit': 'XYZ'}). Neither the tag keys nor the tag values will be modified by this module.	map(string)	{}	no
target_id	The unique identifier (ID) of the organization root, organizational unit, or account number that you want to attach the policy to	string	n/a	yes
tenant	ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for	string	null	no

Outputs

Name	Description
organizations_policy_arn	Amazon Resource Name (ARN) of the policy
organizations_policy_id	The unique identifier of the policy

Related Projects

Check out these related projects.

• terraform-aws-iam-role - A Terraform module that creates IAM role with provided JSON IAM polices documents.
• terraform-aws-iam-policy-document-aggregator - Terraform module to aggregate multiple IAM policy documents into single policy document
• terraform-aws-iam-chamber-s3-role - Terraform module to provision an IAM role with configurable permissions to access S3 as chamber backend.
• terraform-yaml-config - Terraform module to convert local and remote YAML configuration templates into Terraform lists and maps.

References

For additional context, refer to some of these links.

• Service control policies - Service control policies (SCPs) are a type of organization policy that you can use to manage permissions in your organization.
• Example service control policies - Examples of Service Control Policies (SCPs).
• SCP syntax - Service control policies (SCPs) use a similar syntax to that used by AWS Identity and Access Management (IAM) permission policies and resource-based policies.
• Terraform Standard Module Structure - HashiCorp's standard module structure is a file and directory layout we recommend for reusable modules distributed in separate repositories.
• Terraform Module Requirements - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.
• Terraform random_integer Resource - The resource random_integer generates random values from a given range, described by the min and max attributes of a given resource.
• Terraform Version Pinning - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration
• SCPs size limits - The SCP have a size limit and creating many policies at once can result in a POLICY_CONTENT_LIMIT_EXCEEDED error

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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

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