https://github.com/cloudposse/terraform-aws-route53-alias

Terraform Module to Define Vanity Host/Domain (e.g. `brand.com`) as an ALIAS record
https://github.com/cloudposse/terraform-aws-route53-alias

route53 terraform terraform-modules

Last synced: 4 days ago
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Terraform Module to Define Vanity Host/Domain (e.g. `brand.com`) as an ALIAS record

• Host: GitHub
• URL: https://github.com/cloudposse/terraform-aws-route53-alias
• Owner: cloudposse
• License: apache-2.0
• Created: 2017-06-22T10:53:10.000Z (over 7 years ago)
• Default Branch: main
• Last Pushed: 2024-10-11T03:10:02.000Z (3 months ago)
• Last Synced: 2024-12-15T07:06:37.003Z (11 days ago)
• Topics: route53, terraform, terraform-modules
• Language: HCL
• Homepage: https://cloudposse.com/accelerate
• Size: 3.83 MB
• Stars: 57
• Watchers: 19
• Forks: 57
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

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README

        





    




Terraform module that implements "vanity" host names (e.g. `brand.com`) as `ALIAS` records to another Route53 DNS resource record (e.g. ELB/ALB, S3 Bucket Endpoint or CloudFront Distribution).

Unlike `CNAME` records, the synthetic `ALIAS` record works with zone apexes.

> [!TIP]

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> Works with [Github Actions](https://atmos.tools/integrations/github-actions/), [Atlantis](https://atmos.tools/integrations/atlantis), or [Spacelift](https://atmos.tools/integrations/spacelift).

>

> 

> Watch demo of using Atmos with Terraform

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> Example of running atmos to manage infrastructure from our Quick Start tutorial.

> 

## Usage

This will define a `A` resource record for `www.example.com` as an alias of the `aws_elb.example.dns_name`.

```terraform

module "production_www" {

  source = "cloudposse/route53-alias/aws"

  # Cloud Posse recommends pinning every module to a specific version

  # version     = "x.x.x"

  aliases         = ["www.example.com.", "static1.cdn.example.com.", "static2.cdn.example.com"]

  parent_zone_id  = var.parent_zone_id

  target_dns_name = aws_elb.example.dns_name

  target_zone_id  = aws_elb.example.zone_id

}

```

> [!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.

## Makefile Targets

```text

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](#requirement\_terraform) | >= 0.13.0 |

|  [aws](#requirement\_aws) | >= 2.0 |

|  [local](#requirement\_local) | >= 1.2 |

## Providers

| Name | Version |

|------|---------|

|  [aws](#provider\_aws) | >= 2.0 |

## Modules

| Name | Source | Version |

|------|--------|---------|

|  [this](#module\_this) | cloudposse/label/null | 0.25.0 |

## Resources

| Name | Type |

|------|------|

| [aws_route53_record.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_record) | resource |

| [aws_route53_record.ipv6](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_record) | resource |

| [aws_route53_zone.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/route53_zone) | data source |

## Inputs

| Name | Description | Type | Default | Required |

|------|-------------|------|---------|:--------:|

|  [additional\_tag\_map](#input\_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 |

|  [aliases](#input\_aliases) | List of aliases | `list(string)` | n/a | yes |

|  [allow\_overwrite](#input\_allow\_overwrite) | Allow creation of this record in Terraform to overwrite an existing record, if any. This does not affect the ability to update the record in Terraform and does not prevent other resources within Terraform or manual Route 53 changes outside Terraform from overwriting this record. false by default. This configuration is not recommended for most environments | `bool` | `false` | no |

|  [attributes](#input\_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](#input\_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](#input\_delimiter) | Delimiter to be used between ID elements.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |

|  [descriptor\_formats](#input\_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
`{
   format = string
   labels = list(string)
}`
(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](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |

|  [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |

|  [evaluate\_target\_health](#input\_evaluate\_target\_health) | Set to true if you want Route 53 to determine whether to respond to DNS queries | `bool` | `false` | no |

|  [id\_length\_limit](#input\_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 |

|  [ipv6\_enabled](#input\_ipv6\_enabled) | Set to true to enable an AAAA DNS record to be set as well as the A record | `bool` | `false` | no |

|  [label\_key\_case](#input\_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](#input\_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](#input\_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](#input\_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](#input\_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](#input\_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 |

|  [parent\_zone\_id](#input\_parent\_zone\_id) | ID of the hosted zone to contain this record  (or specify `parent_zone_name`) | `string` | `""` | no |

|  [parent\_zone\_name](#input\_parent\_zone\_name) | Name of the hosted zone to contain this record (or specify `parent_zone_id`) | `string` | `""` | no |

|  [private\_zone](#input\_private\_zone) | Is this a private hosted zone? | `bool` | `false` | no |

|  [regex\_replace\_chars](#input\_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 |

|  [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |

|  [tags](#input\_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\_dns\_name](#input\_target\_dns\_name) | DNS name of target resource (e.g. ALB, ELB) | `string` | n/a | yes |

|  [target\_zone\_id](#input\_target\_zone\_id) | ID of target resource (e.g. ALB, ELB) | `string` | n/a | yes |

|  [tenant](#input\_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 |

|------|-------------|

|  [hostnames](#output\_hostnames) | List of DNS records |

|  [parent\_zone\_id](#output\_parent\_zone\_id) | ID of the hosted zone to contain the records |

|  [parent\_zone\_name](#output\_parent\_zone\_name) | Name of the hosted zone to contain the records |

## Related Projects

Check out these related projects.

- [terraform-aws-route53-cluster-hostname](https://github.com/cloudposse/terraform-aws-route53-cluster-hostname) - Terraform module to define a consistent AWS Route53 hostname

- [terraform-aws-route53-cluster-zone](https://github.com/cloudposse/terraform-aws-route53-cluster-zone) - Terraform Cluster Domain (e.g. `prod.ourcompany.com`)

- [terraform-aws-kops-route53](https://github.com/cloudposse/terraform-aws-kops-route53) - Terraform module to lookup the IAM role associated with `kops` masters, and attach an IAM policy to the role with permissions to modify Route53 record sets

> [!TIP]

> #### Use Terraform Reference Architectures for AWS

>

> Use Cloud Posse's ready-to-go [terraform architecture blueprints](https://cloudposse.com/reference-architecture/) for AWS to get up and running quickly.

>

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> 


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## ✨ Contributing

This project is under active development, and we encourage contributions from our community.

Many thanks to our outstanding contributors:



  



For 🐛 bug reports & feature requests, please use the [issue tracker](https://github.com/cloudposse/terraform-aws-route53-alias/issues).

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

 1. Review our [Code of Conduct](https://github.com/cloudposse/terraform-aws-route53-alias/?tab=coc-ov-file#code-of-conduct) and [Contributor Guidelines](https://github.com/cloudposse/.github/blob/main/CONTRIBUTING.md).

 2. **Fork** the repo on GitHub

 3. **Clone** the project to your own machine

 4. **Commit** changes to your own branch

 5. **Push** your work back up to your fork

 6. Submit a **Pull Request** so that we can review your changes

**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!

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Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-route53-alias&utm_content=slack) on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.

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## License



Preamble to the Apache License, Version 2.0







Complete license is available in the [`LICENSE`](LICENSE) file.

```text

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

Unless required by applicable law or agreed to in writing,

software distributed under the License is distributed on an

"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

KIND, either express or implied.  See the License for the

specific language governing permissions and limitations

under the License.

```

## Trademarks

All other trademarks referenced herein are the property of their respective owners.

---

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