https://github.com/cloudposse/terraform-yaml-config

Terraform module to convert local and remote YAML configuration templates into Terraform lists and maps
https://github.com/cloudposse/terraform-yaml-config

config configuration configuration-files configuration-management template template-engine templates templating terraform terraform-module yaml yaml-configuration yaml-files

Last synced: 22 days ago
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Terraform module to convert local and remote YAML configuration templates into Terraform lists and maps

• Host: GitHub
• URL: https://github.com/cloudposse/terraform-yaml-config
• Owner: cloudposse
• License: apache-2.0
• Created: 2020-11-13T23:22:26.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2024-09-19T03:06:21.000Z (about 2 months ago)
• Last Synced: 2024-09-30T15:22:26.873Z (about 1 month ago)
• Topics: config, configuration, configuration-files, configuration-management, template, template-engine, templates, templating, terraform, terraform-module, yaml, yaml-configuration, yaml-files
• Language: HCL
• Homepage: https://cloudposse.com/accelerate
• Size: 2.11 MB
• Stars: 70
• Watchers: 15
• Forks: 25
• Open Issues: 6
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

Awesome Lists containing this project

README

        





    




Terraform module to convert local and remote YAML configuration templates into Terraform lists and maps.

> [!TIP]

> #### 👽 Use Atmos with Terraform

> Cloud Posse uses [`atmos`](https://atmos.tools) to easily orchestrate multiple environments using Terraform. 


> 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

> 


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

> 

## Introduction

The module accepts paths to local and remote YAML configuration template files

and converts the templates into Terraform lists and maps for consumption in other Terraform modules.

The module can accept a map of parameters for interpolation within the YAML config templates.

The module also supports a top-level `import` attribute in map configuration templates, which will include the file and perform a deep merge.

Up to 10 levels of imports hierarchy are supported, and all imported maps are deep merged into a final configuration map.

For example, if you have a config file like this (e.g. `myconfig.yaml`):

  ```yaml

    import:

      - file1

      - file2

  ```

Then, this module will deep merge `file1.yaml` and `file2.yaml` into `myconfig.yaml`.

__Note:__ Do not include the extensions (e.g. `.yaml`) in the imports.

### Attributions

Big thanks to [Imperative Systems Inc.](https://github.com/Imperative-Systems-Inc)

for the excellent [deepmerge](https://github.com/Imperative-Systems-Inc/terraform-modules/tree/master/deepmerge) Terraform module

to perform a deep map merge of standard Terraform maps and objects.

## Usage

For a complete example, see [examples/complete](examples/complete).

For automated tests of the complete example using [bats](https://github.com/bats-core/bats-core) and [Terratest](https://github.com/gruntwork-io/terratest)

(which tests and deploys the example on Datadog), see [test](test).

For an example of using local config maps with `import` and deep merging into a final configuration map, see [examples/imports-local](examples/imports-local).

For an example of using remote config maps with `import` and deep merging into a final configuration map, see [examples/imports-remote](examples/imports-remote).

> [!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

### Example of local and remote maps and lists configurations with interpolation parameters

```hcl

module "yaml_config" {

  source = "cloudposse/config/yaml"

  # Cloud Posse recommends pinning every module to a specific version

  # version     = "x.x.x"

  map_config_local_base_path = "./config"

  map_config_paths = [

    "map-configs/*.yaml",

    "https://raw.githubusercontent.com/cloudposse/terraform-opsgenie-incident-management/master/examples/config/resources/services.yaml",

    "https://raw.githubusercontent.com/cloudposse/terraform-opsgenie-incident-management/master/examples/config/resources/team_routing_rules.yaml"

  ]

  list_config_local_base_path = "./config"

  list_config_paths = [

    "list-configs/*.yaml",

    "https://raw.githubusercontent.com/cloudposse/terraform-aws-service-control-policies/master/examples/complete/policies/organization-policies.yaml"

  ]

  parameters = {

    param1 = "1"

    param2 = "2"

  }

  context = module.this.context

}

```

### Example of local maps configurations with `import` and deep merging

In the example, we use two levels of imports,

and the module deep merges the local config files `imports-level-3.yaml`, `imports-level-2.yaml`, and `imports-level-1.yaml`

into a final config map.

See [examples/imports-local](examples/imports-local) for more details.

```hcl

module "yaml_config" {

  source = "cloudposse/config/yaml"

  # Cloud Posse recommends pinning every module to a specific version

  # version     = "x.x.x"

  map_config_local_base_path = "./config"

  map_config_paths = [

    "imports-level-1.yaml"

  ]

  context = module.this.context

}

```

### Example of remote maps configurations with with `import` and deep merging

In the example, we use two levels of imports,

and the module deep merges the remote config files `globals.yaml`, `ue2-globals.yaml`, and `ue2-prod.yaml`

into a final config map.

See [examples/imports-remote](examples/imports-remote) for more details.

```hcl

module "yaml_config" {

  source = "cloudposse/config/yaml"

  # Cloud Posse recommends pinning every module to a specific version

  # version     = "x.x.x"

  map_config_remote_base_path = "https://raw.githubusercontent.com/cloudposse/atmos/master/example/stacks"

  map_config_paths = [

    "https://raw.githubusercontent.com/cloudposse/atmos/master/example/stacks/ue2-prod.yaml"

  ]

  context = module.this.context

}

```

> [!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.

>

> ✅ We build it together with your team.


> ✅ Your team owns everything.


> ✅ 100% Open Source and backed by fanatical support.


>

> 

> 📚 Learn More

>

> 


>

> Cloud Posse is the leading [**DevOps Accelerator**](https://cpco.io/commercial-support?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-yaml-config&utm_content=commercial_support) for funded startups and enterprises.

>

> *Your team can operate like a pro today.*

>

> Ensure that your team succeeds by using Cloud Posse's proven process and turnkey blueprints. Plus, we stick around until you succeed.

> #### Day-0:  Your Foundation for Success

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>

> 

>

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> - **Training.** Equip your team with the knowledge and skills to confidently manage the infrastructure, ensuring long-term success and self-sufficiency.

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> - **Code Reviews.** Enhance your team’s code quality with our expert feedback, fostering continuous improvement and collaboration.

> - **Bug Fixes.** Rely on our team to troubleshoot and resolve any issues, ensuring your systems run smoothly.

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> 

> 

## 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 |

|  [http](#requirement\_http) | >= 2.0 |

|  [local](#requirement\_local) | >= 1.3 |

|  [template](#requirement\_template) | >= 2.2 |

## Providers

No providers.

## Modules

| Name | Source | Version |

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

|  [maps\_deepmerge](#module\_maps\_deepmerge) | ./modules/deepmerge | n/a |

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

|  [yaml\_config\_1](#module\_yaml\_config\_1) | ./modules/yaml-config | n/a |

|  [yaml\_config\_10](#module\_yaml\_config\_10) | ./modules/yaml-config | n/a |

|  [yaml\_config\_2](#module\_yaml\_config\_2) | ./modules/yaml-config | n/a |

|  [yaml\_config\_3](#module\_yaml\_config\_3) | ./modules/yaml-config | n/a |

|  [yaml\_config\_4](#module\_yaml\_config\_4) | ./modules/yaml-config | n/a |

|  [yaml\_config\_5](#module\_yaml\_config\_5) | ./modules/yaml-config | n/a |

|  [yaml\_config\_6](#module\_yaml\_config\_6) | ./modules/yaml-config | n/a |

|  [yaml\_config\_7](#module\_yaml\_config\_7) | ./modules/yaml-config | n/a |

|  [yaml\_config\_8](#module\_yaml\_config\_8) | ./modules/yaml-config | n/a |

|  [yaml\_config\_9](#module\_yaml\_config\_9) | ./modules/yaml-config | n/a |

## Resources

No resources.

## 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 |

|  [append\_list\_enabled](#input\_append\_list\_enabled) | A boolean flag to enable/disable appending lists instead of overwriting them. | `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 |

|  [deep\_copy\_list\_enabled](#input\_deep\_copy\_list\_enabled) | A boolean flag to enable/disable merging of list elements one by one. | `bool` | `false` | 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 |

|  [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 |

|  [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 |

|  [list\_config\_local\_base\_path](#input\_list\_config\_local\_base\_path) | Base path to local YAML configuration files of list type | `string` | `""` | no |

|  [list\_config\_paths](#input\_list\_config\_paths) | Paths to YAML configuration files of list type | `list(string)` | `[]` | no |

|  [list\_config\_remote\_base\_path](#input\_list\_config\_remote\_base\_path) | Base path to remote YAML configuration files of list type | `string` | `""` | no |

|  [map\_config\_local\_base\_path](#input\_map\_config\_local\_base\_path) | Base path to local YAML configuration files of map type | `string` | `""` | no |

|  [map\_config\_paths](#input\_map\_config\_paths) | Paths to YAML configuration files of map type | `list(string)` | `[]` | no |

|  [map\_config\_remote\_base\_path](#input\_map\_config\_remote\_base\_path) | Base path to remote YAML configuration files of map type | `string` | `""` | no |

|  [map\_configs](#input\_map\_configs) | List of existing configurations of map type. Deep-merging of the existing map configs takes precedence over the map configs loaded from YAML files | `any` | `[]` | 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 |

|  [parameters](#input\_parameters) | Map of parameters for interpolation within the YAML config templates | `map(string)` | `{}` | 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 |

|  [remote\_config\_selector](#input\_remote\_config\_selector) | String to detect local vs. remote config paths | `string` | `"://"` | 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 |

|  [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 |

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

|  [all\_imports\_list](#output\_all\_imports\_list) | List of all imported YAML configurations |

|  [all\_imports\_map](#output\_all\_imports\_map) | Map of all imported YAML configurations |

|  [list\_configs](#output\_list\_configs) | Terraform lists from YAML configurations |

|  [map\_configs](#output\_map\_configs) | Terraform maps from YAML configurations |

## Related Projects

Check out these related projects.

- [terraform-datadog-monitor](https://github.com/cloudposse/terraform-datadog-monitor) - Terraform module to configure and provision Datadog monitors from a YAML configuration, complete with automated tests.

- [terraform-opsgenie-incident-management](https://github.com/cloudposse/terraform-opsgenie-incident-management) - Terraform module to provision Opsgenie resources from YAML configurations using the Opsgenie provider, complete with automated tests.

- [terraform-aws-components](https://github.com/cloudposse/terraform-aws-components) - Catalog of reusable Terraform components and blueprints for provisioning reference architectures.

- [reference-architectures](https://github.com/cloudposse/reference-architectures) - Get up and running quickly with one of our reference architecture using our fully automated cold-start process.

## References

For additional context, refer to some of these links.

- [Terraform Standard Module Structure](https://www.terraform.io/docs/modules/index.html#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](https://www.terraform.io/docs/registry/modules/publish.html#requirements) - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.

- [Terraform Version Pinning](https://www.terraform.io/docs/configuration/terraform.html#specifying-a-required-terraform-version) - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration.

- [Terraform `templatefile` Function](https://www.terraform.io/docs/configuration/functions/templatefile.html) - `templatefile` reads the file at the given path and renders its content as a template using a supplied set of template variables.

- [Terraform `template_file` data source](https://registry.terraform.io/providers/hashicorp/template/latest/docs/data-sources/file) - The `template_file` data source renders a template from a template string, which is usually loaded from an external file.

- [Deepmerge](https://github.com/Imperative-Systems-Inc/terraform-modules/tree/master/deepmerge) - Terraform module to perform a deep map merge of standard Terraform maps and objects.

## ✨ 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-yaml-config/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-yaml-config/?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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## 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.

## Copyrights

Copyright © 2020-2024 [Cloud Posse, LLC](https://cloudposse.com)