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terraform-google-composer

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Manages Cloud Composer v1 and v2 along with option to manage networking

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# terraform-google-composer

This module makes it easy to create a Cloud Composer Environment. As the module develops, this README should be updated.

The resources/services/activations/deletions that this module will create/trigger are:

- Create a GCP Composer Environment

## Compatibility

This module is meant for use with Terraform 1.3+ and tested using Terraform 1.3+. If you find incompatibilities using Terraform >=1.3, please open an issue.

## Version

Current version is 4.0. Upgrade guides:

- [3.X -> 4.0.](/docs/upgrading_to_v4.0.md)
- [4.X -> 5.0.](/docs/upgrading_to_v5.0.md)

## Usage
Cloud Composer currently has two versions: V2 has greater flexibility in the Airflow core services
(scheduler, webserver, worker) and has a more practical and scalable infrastructure. Therefore, we recommend prioritizing the
use of [V2](/modules/create_environment_v2/) for new environments.

You can find an overview of the product [here](https://cloud.google.com/composer/docs/composer-2/composer-overview)
and the [list of major differences](https://cloud.google.com/composer/docs/concepts/versioning/composer-versioning-overview). Plans for Cloud Composer V1 end of support is documented [here](https://cloud.google.com/composer/docs/composer-versioning-overview#version-support-for-composer-1).

Simple usage is as follows:

```hcl
module "composer" {
  source  = "terraform-google-modules/composer/google"
  version = "~> 6.4"

project_id        = "<PROJECT ID>"
  region            = "us-central1"
  composer_env_name = "composer-env-test"
  network           = "test-network"
  subnetwork        = "composer-subnet"
  enable_private_endpoint = false
}
```

Functional examples are included in the
[examples](./examples/) directory.

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| composer\_env\_name | Name of Cloud Composer Environment | `string` | n/a | yes |
| enable\_private\_endpoint | Configure public access to the cluster endpoint. | `bool` | `false` | no |
| network | Network where Cloud Composer is created. | `string` | n/a | yes |
| project\_id | Project ID where Cloud Composer Environment is created. | `string` | n/a | yes |
| region | Region where the Cloud Composer Environment is created. | `string` | n/a | yes |
| subnetwork | Subetwork where Cloud Composer is created. | `string` | n/a | yes |
| zone | Zone where the Cloud Composer Environment is created. | `string` | n/a | yes |

## Outputs

| Name | Description |
|------|-------------|
| airflow\_uri | URI of the Apache Airflow Web UI hosted within the Cloud Composer Environment. |
| composer\_env\_id | ID of Cloud Composer Environment. |
| composer\_env\_name | The name of the Cloud Composer Environment. |
| gcs\_bucket | Google Cloud Storage bucket which hosts DAGs for the Cloud Composer Environment. |
| gke\_cluster | Google Kubernetes Engine cluster used to run the Cloud Composer Environment. |

## Requirements

These sections describe requirements for using this module.

### Software

The following dependencies must be available:

- [Terraform][terraform] v1.3+
- [Terraform Provider for GCP][terraform-provider-gcp] plugin v5.3+

### Service Account

A service account with the following roles must be used to provision
the resources of this module:

- Project Editor: `roles/editor`
- Network Admin: `roles/compute.networkAdmin`
- Instance Admin: `roles/compute.instanceAdmin.v1`
- Service Account User: `roles/iam.serviceAccountUser`
- Composer Worker: `roles/composer.worker`

The [Project Factory module][project-factory-module] and the
[IAM module][iam-module] may be used in combination to provision a
service account with the necessary roles applied.

### APIs

A project with the following APIs enabled must be used to host the
resources of this module:

- Cloud Composer API: `composer.googleapis.com`

The [Project Factory module][project-factory-module] can be used to
provision a project with the necessary APIs enabled.

## Contributing

Refer to the [contribution guidelines](./CONTRIBUTING.md) for
information on contributing to this module.

[iam-module]: https://registry.terraform.io/modules/terraform-google-modules/iam/google
[project-factory-module]: https://registry.terraform.io/modules/terraform-google-modules/project-factory/google
[terraform-provider-gcp]: https://www.terraform.io/docs/providers/google/index.html
[terraform]: https://www.terraform.io/downloads.html

terraform-google-composer

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