Awesome

This component is responsible for enabling AWS Shield Advanced Protection for the following resources:

Application Load Balancers (ALBs)
CloudFront Distributions
Elastic IPs
Route53 Hosted Zones

This component assumes that resources it is configured to protect are not already protected by other components that have their xxx_aws_shield_protection_enabled variable set to true.

This component also requires that the account where the component is being provisioned to has been subscribed to AWS Shield Advanced.

Usage

Stack Level: Global or Regional

The following snippet shows how to use all of this component's features in a stack configuration:

components:
  terraform:
    aws-shield:
      settings:
        spacelift:
          workspace_enabled: true
      vars:
        enabled: true
        route53_zone_names:
          - test.ue1.example.net
        alb_names:
          - k8s-common-2c5f23ff99
        cloudfront_distribution_ids:
          - EDFDVBD632BHDS5
        eips:
          - 3.214.128.240
          - 35.172.208.150
          - 35.171.70.50

A typical global configuration will only include the route53_zone_names and cloudfront_distribution_ids variables, as global Route53 Hosted Zones may exist in that account, and because CloudFront is a global AWS service.

A global stack configuration will not have a VPC, and hence alb_names and eips should not be defined:

components:
  terraform:
    aws-shield:
      settings:
        spacelift:
          workspace_enabled: true
      vars:
        enabled: true
        route53_zone_names:
          - test.example.net
        cloudfront_distribution_ids:
          - EDFDVBD632BHDS5

Regional stack configurations will typically make use of all resources except for cloudfront_distribution_ids:

components:
  terraform:
    aws-shield:
      settings:
        spacelift:
          workspace_enabled: true
      vars:
        route53_zone_names:
          - test.ue1.example.net
        alb_names:
          - k8s-common-2c5f23ff99
        eips:
          - 3.214.128.240
          - 35.172.208.150
          - 35.171.70.50

Stack configurations which rely on components with a xxx_aws_shield_protection_enabled variable should set that variable to true and leave the corresponding variable for this component as empty, relying on that component's AWS Shield Advanced functionality instead. This leads to more simplified inter-component dependencies and minimizes the need for maintaining the provisioning order during a cold-start.

Requirements

Name	Version
<a name="requirement_terraform"></a> terraform	>= 1.0.0
<a name="requirement_aws"></a> aws	>= 4.0

Providers

Name	Version
<a name="provider_aws"></a> aws	>= 4.0

Modules

Name	Source	Version
<a name="module_alb"></a> alb	cloudposse/stack-config/yaml//modules/remote-state	1.5.0
<a name="module_iam_roles"></a> iam_roles	../account-map/modules/iam-roles	n/a
<a name="module_this"></a> this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_shield_protection.alb_shield_protection	resource
aws_shield_protection.cloudfront_shield_protection	resource
aws_shield_protection.eip_shield_protection	resource
aws_shield_protection.route53_zone_protection	resource
aws_alb.alb	data source
aws_caller_identity.current	data source
aws_cloudfront_distribution.cloudfront_distribution	data source
aws_eip.eip	data source
aws_partition.current	data source
aws_route53_zone.route53_zone	data source

Inputs

Name	Description	Type	Default	Required
<a name="input_additional_tag_map"></a> additional_tag_map	Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration.	`map(string)`	`{}`	no
<a name="input_alb_names"></a> alb_names	list of ALB names which will be protected with AWS Shield Advanced	`list(string)`	`[]`	no
<a name="input_alb_protection_enabled"></a> alb_protection_enabled	Enable ALB protection. By default, ALB names are read from the EKS cluster ALB control group	`bool`	`false`	no
<a name="input_attributes"></a> attributes	ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br>in the order they appear in the list. New attributes are appended to the<br>end of the list. The elements of the list are joined by the `delimiter`<br>and treated as a single ID element.	`list(string)`	`[]`	no
<a name="input_cloudfront_distribution_ids"></a> cloudfront_distribution_ids	list of CloudFront Distribution IDs which will be protected with AWS Shield Advanced	`list(string)`	`[]`	no
<a name="input_context"></a> context	Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional_tag_map, which are merged.	`any`	<pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "descriptor_formats": {},<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "labels_as_tags": [<br> "unset"<br> ],<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {},<br> "tenant": null<br>}</pre>	no
<a name="input_delimiter"></a> delimiter	Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.	`string`	`null`	no
<a name="input_descriptor_formats"></a> descriptor_formats	Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br> format = string<br> labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty).	`any`	`{}`	no
<a name="input_eips"></a> eips	List of Elastic IPs which will be protected with AWS Shield Advanced	`list(string)`	`[]`	no
<a name="input_enabled"></a> enabled	Set to false to prevent the module from creating any resources	`bool`	`null`	no
<a name="input_environment"></a> environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	`string`	`null`	no
<a name="input_id_length_limit"></a> id_length_limit	Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for keep the existing setting, which defaults to `0`.<br>Does not affect `id_full`.	`number`	`null`	no
<a name="input_label_key_case"></a> label_key_case	Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br>Does not affect keys of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`.	`string`	`null`	no
<a name="input_label_order"></a> label_order	The order in which the labels (ID elements) appear in the `id`.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.	`list(string)`	`null`	no
<a name="input_label_value_case"></a> label_value_case	Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`.	`string`	`null`	no
<a name="input_labels_as_tags"></a> labels_as_tags	Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>Notes:<br> The value of the `name` tag, if included, will be the `id`, not the `name`.<br> Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br> changed in later chained modules. Attempts to change it will be silently ignored.	`set(string)`	<pre>[<br> "default"<br>]</pre>	no
<a name="input_name"></a> name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.	`string`	`null`	no
<a name="input_namespace"></a> 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
<a name="input_regex_replace_chars"></a> regex_replace_chars	Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.	`string`	`null`	no
<a name="input_region"></a> region	AWS Region	`string`	n/a	yes
<a name="input_route53_zone_names"></a> route53_zone_names	List of Route53 Hosted Zone names which will be protected with AWS Shield Advanced	`list(string)`	`[]`	no
<a name="input_stage"></a> stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	`string`	`null`	no
<a name="input_tags"></a> tags	Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br>Neither the tag keys nor the tag values will be modified by this module.	`map(string)`	`{}`	no
<a name="input_tenant"></a> 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
<a name="output_application_load_balancer_protections"></a> application_load_balancer_protections	AWS Shield Advanced Protections for ALBs
<a name="output_cloudfront_distribution_protections"></a> cloudfront_distribution_protections	AWS Shield Advanced Protections for CloudFront Distributions
<a name="output_elastic_ip_protections"></a> elastic_ip_protections	AWS Shield Advanced Protections for Elastic IPs
<a name="output_route53_hosted_zone_protections"></a> route53_hosted_zone_protections	AWS Shield Advanced Protections for Route53 Hosted Zones

References

cloudposse/terraform-aws-components - Cloud Posse's upstream component

[!NOTE] This project is part of Cloud Posse's comprehensive "SweetOps" approach towards DevOps.
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Related Projects

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Cloud Posse Terraform Modules - Our collection of reusable Terraform modules used by our reference architectures.
Atmos - Atmos is like docker-compose but for your infrastructure

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About

This project is maintained by <a href="https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse-terraform-components/aws-shield&utm_content=">Cloud Posse, LLC</a>. <a href="https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse-terraform-components/aws-shield&utm_content="><img src="https://cloudposse.com/logo-300x69.svg" align="right" /></a>

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