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Billing budget factory (#1822)
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* billing budget factory

* review comment changes
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ludoo authored Oct 29, 2023
1 parent 7c6726e commit 671f06a
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57 changes: 50 additions & 7 deletions modules/billing-account/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ provider "google" {
- [Billing budgets](#billing-budgets)
- [PubSub update rules](#pubsub-update-rules)
- [Monitoring channels](#monitoring-channels)
- [Budget factory](#budget-factory)
- [Variables](#variables)
- [Outputs](#outputs)
<!-- END TOC -->
Expand Down Expand Up @@ -212,21 +213,63 @@ module "billing-account" {
# tftest modules=1 resources=2 inventory=budget-monitoring-channel.yaml
```

#### Budget factory

This module also exposes a factory for billing budgets, that works in a similar way to factories in other modules: a specific folder is searched for YAML files, which contain one budget description per file. The file name is used to generate the key of the resulting map of budgets, which is merged with the one coming from the `budgets` variable. The YAML files support the same type of the `budgets` variable.

```hcl
module "billing-account" {
source = "./fabric/modules/billing-account"
id = "012345-ABCDEF-012345"
budget_notification_channels = {
billing-default = {
project_id = "tf-playground-simple"
type = "email"
labels = {
email_address = "[email protected]"
}
}
}
}
# tftest modules=1 resources=2 files=test-1 inventory=budget-monitoring-channel.yaml
```

```yaml
# tftest-file id=test-1 path=data/billing-budgets/folder-net-month-current-100.yaml
display_name: 100 dollars in current spend
amount:
units: 100
filter:
period:
calendar: MONTH
resource_ancestors:
- folders/1234567890
threshold_rules:
- percent: 0.5
- percent: 0.75
update_rules:
default:
disable_default_iam_recipients: true
monitoring_notification_channels:
- billing-default
```
<!-- markdownlint-enable -->
<!-- BEGIN TFDOC -->
## Variables
| name | description | type | required | default |
|---|---|:---:|:---:|:---:|
| [id](variables.tf#L165) | Billing account id. | <code>string</code> || |
| [id](variables.tf#L175) | Billing account id. | <code>string</code> | ✓ | |
| [budget_notification_channels](variables.tf#L17) | Notification channels used by budget alerts. | <code title="map&#40;object&#40;&#123;&#10; project_id &#61; string&#10; type &#61; string&#10; description &#61; optional&#40;string&#41;&#10; display_name &#61; optional&#40;string&#41;&#10; enabled &#61; optional&#40;bool, true&#41;&#10; force_delete &#61; optional&#40;bool&#41;&#10; labels &#61; optional&#40;map&#40;string&#41;&#41;&#10; sensitive_labels &#61; optional&#40;list&#40;object&#40;&#123;&#10; auth_token &#61; optional&#40;string&#41;&#10; password &#61; optional&#40;string&#41;&#10; service_key &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;&#41;&#10; user_labels &#61; optional&#40;map&#40;string&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [budgets](variables.tf#L47) | Billing budgets. Notification channels are either keys in corresponding variable, or external ids. | <code title="map&#40;object&#40;&#123;&#10; amount &#61; object&#40;&#123;&#10; currency_code &#61; optional&#40;string&#41;&#10; nanos &#61; optional&#40;number&#41;&#10; units &#61; optional&#40;number&#41;&#10; use_last_period &#61; optional&#40;bool&#41;&#10; &#125;&#41;&#10; display_name &#61; optional&#40;string&#41;&#10; filter &#61; optional&#40;object&#40;&#123;&#10; credit_types_treatment &#61; optional&#40;object&#40;&#123;&#10; exclude_all &#61; optional&#40;bool&#41;&#10; include_specified &#61; optional&#40;list&#40;string&#41;&#41;&#10; &#125;&#41;&#41;&#10; label &#61; optional&#40;object&#40;&#123;&#10; key &#61; string&#10; value &#61; string&#10; &#125;&#41;&#41;&#10; period &#61; optional&#40;object&#40;&#123;&#10; calendar &#61; optional&#40;string&#41;&#10; custom &#61; optional&#40;object&#40;&#123;&#10; start_date &#61; object&#40;&#123;&#10; day &#61; number&#10; month &#61; number&#10; year &#61; number&#10; &#125;&#41;&#10; end_date &#61; optional&#40;object&#40;&#123;&#10; day &#61; number&#10; month &#61; number&#10; year &#61; number&#10; &#125;&#41;&#41;&#10; &#125;&#41;&#41;&#10; &#125;&#41;&#41;&#10; projects &#61; optional&#40;list&#40;string&#41;&#41;&#10; resource_ancestors &#61; optional&#40;list&#40;string&#41;&#41;&#10; services &#61; optional&#40;list&#40;string&#41;&#41;&#10; subaccounts &#61; optional&#40;list&#40;string&#41;&#41;&#10; &#125;&#41;&#41;&#10; threshold_rules &#61; optional&#40;list&#40;object&#40;&#123;&#10; percent &#61; number&#10; forecasted_spend &#61; optional&#40;bool&#41;&#10; &#125;&#41;&#41;, &#91;&#93;&#41;&#10; update_rules &#61; optional&#40;map&#40;object&#40;&#123;&#10; disable_default_iam_recipients &#61; optional&#40;bool&#41;&#10; monitoring_notification_channels &#61; optional&#40;list&#40;string&#41;&#41;&#10; pubsub_topic &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;, &#123;&#125;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [group_iam](variables.tf#L121) | Authoritative IAM binding for organization groups, in {GROUP_EMAIL => [ROLES]} format. Group emails need to be static. Can be used in combination with the `iam` variable. | <code>map&#40;list&#40;string&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam](variables.tf#L128) | IAM bindings in {ROLE => [MEMBERS]} format. | <code>map&#40;list&#40;string&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam_bindings](variables.tf#L135) | Authoritative IAM bindings in {KEY => {role = ROLE, members = [], condition = {}}}. Keys are arbitrary. | <code title="map&#40;object&#40;&#123;&#10; members &#61; list&#40;string&#41;&#10; role &#61; string&#10; condition &#61; optional&#40;object&#40;&#123;&#10; expression &#61; string&#10; title &#61; string&#10; description &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam_bindings_additive](variables.tf#L150) | Individual additive IAM bindings. Keys are arbitrary. | <code title="map&#40;object&#40;&#123;&#10; member &#61; string&#10; role &#61; string&#10; condition &#61; optional&#40;object&#40;&#123;&#10; expression &#61; string&#10; title &#61; string&#10; description &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [logging_sinks](variables.tf#L170) | Logging sinks to create for the organization. | <code title="map&#40;object&#40;&#123;&#10; destination &#61; string&#10; type &#61; string&#10; bq_partitioned_table &#61; optional&#40;bool&#41;&#10; description &#61; optional&#40;string&#41;&#10; disabled &#61; optional&#40;bool, false&#41;&#10; exclusions &#61; optional&#40;map&#40;object&#40;&#123;&#10; filter &#61; string&#10; description &#61; optional&#40;string&#41;&#10; disabled &#61; optional&#40;bool&#41;&#10; &#125;&#41;&#41;, &#123;&#125;&#41;&#10; filter &#61; optional&#40;string&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [projects](variables.tf#L203) | Projects associated with this billing account. | <code>list&#40;string&#41;</code> | | <code>&#91;&#93;</code> |
| [factory_config](variables.tf#L121) | Path to folder containing budget alerts data files. | <code title="object&#40;&#123;&#10; budgets_data_path &#61; optional&#40;string, &#34;data&#47;billing-budgets&#34;&#41;&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> | | <code>&#123;&#125;</code> |
| [group_iam](variables.tf#L131) | Authoritative IAM binding for organization groups, in {GROUP_EMAIL => [ROLES]} format. Group emails need to be static. Can be used in combination with the `iam` variable. | <code>map&#40;list&#40;string&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam](variables.tf#L138) | IAM bindings in {ROLE => [MEMBERS]} format. | <code>map&#40;list&#40;string&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam_bindings](variables.tf#L145) | Authoritative IAM bindings in {KEY => {role = ROLE, members = [], condition = {}}}. Keys are arbitrary. | <code title="map&#40;object&#40;&#123;&#10; members &#61; list&#40;string&#41;&#10; role &#61; string&#10; condition &#61; optional&#40;object&#40;&#123;&#10; expression &#61; string&#10; title &#61; string&#10; description &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [iam_bindings_additive](variables.tf#L160) | Individual additive IAM bindings. Keys are arbitrary. | <code title="map&#40;object&#40;&#123;&#10; member &#61; string&#10; role &#61; string&#10; condition &#61; optional&#40;object&#40;&#123;&#10; expression &#61; string&#10; title &#61; string&#10; description &#61; optional&#40;string&#41;&#10; &#125;&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [logging_sinks](variables.tf#L180) | Logging sinks to create for the organization. | <code title="map&#40;object&#40;&#123;&#10; destination &#61; string&#10; type &#61; string&#10; bq_partitioned_table &#61; optional&#40;bool&#41;&#10; description &#61; optional&#40;string&#41;&#10; disabled &#61; optional&#40;bool, false&#41;&#10; exclusions &#61; optional&#40;map&#40;object&#40;&#123;&#10; filter &#61; string&#10; description &#61; optional&#40;string&#41;&#10; disabled &#61; optional&#40;bool&#41;&#10; &#125;&#41;&#41;, &#123;&#125;&#41;&#10; filter &#61; optional&#40;string&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | | <code>&#123;&#125;</code> |
| [projects](variables.tf#L213) | Projects associated with this billing account. | <code>list&#40;string&#41;</code> | | <code>&#91;&#93;</code> |

## Outputs

Expand Down
2 changes: 1 addition & 1 deletion modules/billing-account/budgets.tf
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ resource "google_monitoring_notification_channel" "default" {
}

resource "google_billing_budget" "default" {
for_each = var.budgets
for_each = merge(local.factory_budgets, var.budgets)
billing_account = var.id
display_name = each.value.display_name
dynamic "amount" {
Expand Down
98 changes: 98 additions & 0 deletions modules/billing-account/factory.tf
Original file line number Diff line number Diff line change
@@ -0,0 +1,98 @@
/**
* Copyright 2023 Google LLC
*
* Licensed 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
*
* http://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.
*/

locals {
_factory_data = {
for f in fileset("${local._factory_path}", "**/*.yaml") :
trimsuffix(f, ".yaml") => yamldecode(file("${local._factory_path}/${f}"))
}
_factory_path = var.factory_config.budgets_data_path
factory_budgets = {
for k, v in local._factory_data : k => merge(v, {
amount = merge(
{
currency_code = null
nanos = null
units = null
use_last_period = null
},
try(v.amount, {})
)
display_name = try(v.display_name, null)
filter = try(v.filter, null) == null ? null : {
credit_types_treatment = (
try(v.filter.credit_types_treatment, null) == null
? null
: merge(
{ exclude_all = null, include_specified = null },
v.filter.credit_types_treatment
)
)
label = try(v.filter.label, null)
projects = try(v.filter.projects, null)
resource_ancestors = try(v.filter.resource_ancestors, null)
services = try(v.filter.services, null)
subaccounts = try(v.filter.subaccounts, null)
}
threshold_rules = [
for vv in try(v.threshold_rules, []) : merge({
percent = null
forecasted_spend = null
}, vv)
]
update_rules = {
for kk, vv in try(v.update_rules, {}) : kk => merge({
disable_default_iam_recipients = null
monitoring_notification_channels = null
pubsub_topic = null
}, vv)
}
})
}
}

# check data coming from the factory as it bypasses variable validation rules

check "factory_budgets" {
assert {
condition = alltrue([
for k, v in local.factory_budgets : v.amount != null && (
try(v.amount.use_last_period, null) == true ||
try(v.amount.units, null) != null
)
])
error_message = "Factory budgets need either amount units or last period set."
}
assert {
condition = alltrue([
for k, v in local.factory_budgets :
v.threshold_rules == null || try(v.threshold_rules.percent, null) != null
])
error_message = "Threshold rules need percent set."
}
assert {
condition = alltrue(flatten([
for k, v in local.factory_budgets : [
for kk, vv in v.update_rules : [
vv.monitoring_notification_channels != null
||
vv.pubsub_topic != null
]
]
]))
error_message = "Notification rules need either a pubsub topic or monitoring channels defined."
}
}
10 changes: 10 additions & 0 deletions modules/billing-account/variables.tf
Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,16 @@ variable "budgets" {
}
}

variable "factory_config" {
# TODO: align all other factory variable names
description = "Path to folder containing budget alerts data files."
type = object({
budgets_data_path = optional(string, "data/billing-budgets")
})
nullable = false
default = {}
}

variable "group_iam" {
description = "Authoritative IAM binding for organization groups, in {GROUP_EMAIL => [ROLES]} format. Group emails need to be static. Can be used in combination with the `iam` variable."
type = map(list(string))
Expand Down

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