# Google Cloud Billing Budget Module

This module allows creating a Cloud Billing budget for a set of services and projects.

To create billing budgets you need one of the following IAM roles on the target billing account:

* Billing Account Administrator
* Billing Account Costs Manager

## Examples

### Simple email notification

Send a notification to an email when a set of projects reach $100 of spend.

```hcl
module "budget" {
  source          = "./modules/billing-budget"
  billing_account = var.billing_account_id
  name            = "$100 budget"
  amount          = 100
  thresholds = {
    current    = [0.5, 0.75, 1.0]
    forecasted = [1.0]
  }
  projects = [
    "projects/123456789000",
    "projects/123456789111"
  ]
  email_recipients = {
    project_id = "my-project"
    emails     =  ["user@example.com"]
  }
}
# tftest:modules=1:resources=2
```

### Pubsub notification

Send a notification to a PubSub topic the total spend of a billing account reaches the previous month's spend.


```hcl
module "budget" {
  source          = "./modules/billing-budget"
  billing_account = var.billing_account_id
  name            = "previous period budget"
  amount          = 0
  thresholds = {
    current    = [1.0]
    forecasted = []
  }
  pubsub_topic = module.pubsub.id
}

module "pubsub" {
  source     = "./modules/pubsub"
  project_id = var.project_id
  name       = "budget-topic"
}

# tftest:modules=2:resources=2
```

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## Variables

| name | description | type | required | default |
|---|---|:---: |:---:|:---:|
| billing_account | Billing account id. | <code title="">string</code> | ✓ |  |
| name | Budget name. | <code title="">string</code> | ✓ |  |
| thresholds | Thresholds percentages at which alerts are sent. Must be a value between 0 and 1. | <code title="object&#40;&#123;&#10;current    &#61; list&#40;number&#41;&#10;forecasted &#61; list&#40;number&#41;&#10;&#125;&#41;&#10;validation &#123;&#10;condition     &#61; length&#40;var.thresholds.current&#41; &#62; 0 &#124;&#124; length&#40;var.thresholds.forecasted&#41; &#62; 0&#10;error_message &#61; &#34;Must specify at least one budget threshold.&#34;&#10;&#125;">object({...})</code> | ✓ |  |
| *amount* | Amount in the billing account's currency for the budget. Use 0 to set budget to 100% of last period's spend. | <code title="">number</code> |  | <code title="">0</code> |
| *credit_treatment* | How credits should be treated when determining spend for threshold calculations. Only INCLUDE_ALL_CREDITS or EXCLUDE_ALL_CREDITS are supported | <code title="">string</code> |  | <code title="INCLUDE_ALL_CREDITS&#10;validation &#123;&#10;condition &#61; &#40;&#10;var.credit_treatment &#61;&#61; &#34;INCLUDE_ALL_CREDITS&#34; &#124;&#124;&#10;var.credit_treatment &#61;&#61; &#34;EXCLUDE_ALL_CREDITS&#34;&#10;&#41;&#10;error_message &#61; &#34;Argument credit_treatment must be INCLUDE_ALL_CREDITS or EXCLUDE_ALL_CREDITS.&#34;&#10;&#125;">...</code> |
| *email_recipients* | Emails where budget notifications will be sent. Setting this will create a notification channel for each email in the specified project. | <code title="object&#40;&#123;&#10;project_id &#61; string&#10;emails     &#61; list&#40;string&#41;&#10;&#125;&#41;">object({...})</code> |  | <code title="">null</code> |
| *notification_channels* | Monitoring notification channels where to send updates. | <code title="list&#40;string&#41;">list(string)</code> |  | <code title="">null</code> |
| *notify_default_recipients* | Notify Billing Account Administrators and Billing Account Users IAM roles for the target account. | <code title="">bool</code> |  | <code title="">false</code> |
| *projects* | List of projects of the form projects/{project_number}, specifying that usage from only this set of projects should be included in the budget. Set to null to include all projects linked to the billing account. | <code title="list&#40;string&#41;">list(string)</code> |  | <code title="">null</code> |
| *pubsub_topic* | The ID of the Cloud Pub/Sub topic where budget related messages will be published. | <code title="">string</code> |  | <code title="">null</code> |
| *services* | List of services of the form services/{service_id}, specifying that usage from only this set of services should be included in the budget. Set to null to include usage for all services. | <code title="list&#40;string&#41;">list(string)</code> |  | <code title="">null</code> |

## Outputs

| name | description | sensitive |
|---|---|:---:|
| budget | Budget resource. |  |
| id | Budget ID. |  |
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