Normalize prefix handling in blueprints (GoogleCloudPlatform#1003)

Author: kunzese

CONTRIBUTING.md

@@ -209,7 +209,7 @@ module "project" {
     ]
   }
   iam = {
-    "roles/editor" = [      
+    "roles/editor" = [
       "serviceAccount:${module.project.service_accounts.cloud_services}"
     ]
   }
@@ -236,7 +236,7 @@ module "project" {
   source          = "./modules/project"
   name            = "project-example"
   iam = {
-    "roles/editor" = [      
+    "roles/editor" = [
       "serviceAccount:${module.project.service_accounts.cloud_services}"
     ]
   }
@@ -543,16 +543,16 @@ locals {
 
 #### The `prefix` variable
 
-If you would like to use a "prefix" variable for resource names, please keep its definition consistent across all code:
+If you would like to use a "prefix" variable for resource names, please keep its definition consistent across all modules:
 ```hcl
 # variables.tf
 variable "prefix" {
   description = "Optional prefix used for resource names."
   type        = string
   default     = null
   validation {
-    condition = var.prefix != ""
-    error_message = "Prefix can not be empty, please use null instead."
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty, please use null instead."
   }
 }
 
@@ -562,6 +562,18 @@ locals {
 }
 ```
 
+For blueprints the prefix is mandatory:
+```hcl
+variable "prefix" {
+  description = "Prefix used for resource names."
+  type        = string
+  validation {
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty."
+  }
+}
+```
+
 ### Interacting with checks, tests and tools
 
 Our modules are designed for composition and live in a monorepo together with several end-to-end blueprints, so it was inevitable that over time we found ways of ensuring that a change does not break consumers.

blueprints/cloud-operations/adfs/README.md

@@ -54,18 +54,18 @@ Once done testing, you can clean up resources by running `terraform destroy`.
 |---|---|:---:|:---:|:---:|
 | [ad_dns_domain_name](variables.tf#L15) | AD DNS domain name. | <code>string</code> | ✓ |  |
 | [adfs_dns_domain_name](variables.tf#L26) | ADFS DNS domain name. | <code>string</code> | ✓ |  |
-| [project_id](variables.tf#L79) | Host project ID. | <code>string</code> | ✓ |  |
+| [prefix](variables.tf#L64) | Prefix used for resource names. | <code>string</code> | ✓ |  |
+| [project_id](variables.tf#L82) | Host project ID. | <code>string</code> | ✓ |  |
 | [ad_ip_cidr_block](variables.tf#L20) | Managed AD IP CIDR block. | <code>string</code> |  | <code>&#34;10.0.0.0&#47;24&#34;</code> |
 | [disk_size](variables.tf#L31) | Disk size. | <code>number</code> |  | <code>50</code> |
 | [disk_type](variables.tf#L37) | Disk type. | <code>string</code> |  | <code>&#34;pd-ssd&#34;</code> |
 | [image](variables.tf#L43) | Image. | <code>string</code> |  | <code>&#34;projects&#47;windows-cloud&#47;global&#47;images&#47;family&#47;windows-2022&#34;</code> |
 | [instance_type](variables.tf#L49) | Instance type. | <code>string</code> |  | <code>&#34;n1-standard-2&#34;</code> |
 | [network_config](variables.tf#L55) | Network configuration | <code title="object&#40;&#123;&#10;  network &#61; string&#10;  subnet  &#61; string&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code>null</code> |
-| [prefix](variables.tf#L64) | Prefix for the resources created. | <code>string</code> |  | <code>null</code> |
-| [project_create](variables.tf#L70) | Parameters for the creation of the new project. | <code title="object&#40;&#123;&#10;  billing_account_id &#61; string&#10;  parent             &#61; string&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code>null</code> |
-| [region](variables.tf#L84) | Region. | <code>string</code> |  | <code>&#34;europe-west1&#34;</code> |
-| [subnet_ip_cidr_block](variables.tf#L90) | Subnet IP CIDR block. | <code>string</code> |  | <code>&#34;10.0.1.0&#47;28&#34;</code> |
-| [zone](variables.tf#L96) | Zone. | <code>string</code> |  | <code>&#34;europe-west1-c&#34;</code> |
+| [project_create](variables.tf#L73) | Parameters for the creation of the new project. | <code title="object&#40;&#123;&#10;  billing_account_id &#61; string&#10;  parent             &#61; string&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code>null</code> |
+| [region](variables.tf#L87) | Region. | <code>string</code> |  | <code>&#34;europe-west1&#34;</code> |
+| [subnet_ip_cidr_block](variables.tf#L93) | Subnet IP CIDR block. | <code>string</code> |  | <code>&#34;10.0.1.0&#47;28&#34;</code> |
+| [zone](variables.tf#L99) | Zone. | <code>string</code> |  | <code>&#34;europe-west1-c&#34;</code> |
 
 ## Outputs
 

blueprints/cloud-operations/adfs/main.tf

@@ -12,10 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-locals {
-  prefix = (var.prefix == null || var.prefix == "") ? "" : "${var.prefix}-"
-}
-
 module "project" {
   source = "../../../modules/project"
   billing_account = (
@@ -41,7 +37,7 @@ module "vpc" {
   count      = var.network_config == null ? 1 : 0
   source     = "../../../modules/net-vpc"
   project_id = module.project.project_id
-  name       = "${local.prefix}vpc"
+  name       = "${var.prefix}-vpc"
   subnets = [
     {
       ip_cidr_range = var.subnet_ip_cidr_block
@@ -98,7 +94,7 @@ module "server" {
 
 module "glb" {
   source     = "../../../modules/net-glb"
-  name       = "${local.prefix}glb"
+  name       = "${var.prefix}-glb"
   project_id = module.project.project_id
 
   https              = true

blueprints/cloud-operations/adfs/variables.tf

@@ -62,9 +62,12 @@ variable "network_config" {
 }
 
 variable "prefix" {
-  description = "Prefix for the resources created."
+  description = "Prefix used for resource names."
   type        = string
-  default     = null
+  validation {
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty."
+  }
 }
 
 variable "project_create" {

blueprints/cloud-operations/dns-shared-vpc/README.md

@@ -26,11 +26,11 @@ Note that Terraform 0.13 at least is required due to the use of `for_each` with
 |---|---|:---:|:---:|:---:|
 | [billing_account_id](variables.tf#L17) | Billing account associated with the GCP Projects that will be created for each team. | <code>string</code> | ✓ |  |
 | [folder_id](variables.tf#L28) | Folder ID in which DNS projects will be created. | <code>string</code> | ✓ |  |
-| [shared_vpc_link](variables.tf#L48) | Shared VPC self link, used for DNS peering. | <code>string</code> | ✓ |  |
+| [prefix](variables.tf#L33) | Prefix used for resource names. | <code>string</code> | ✓ |  |
+| [shared_vpc_link](variables.tf#L51) | Shared VPC self link, used for DNS peering. | <code>string</code> | ✓ |  |
 | [dns_domain](variables.tf#L22) | DNS domain under which each application team DNS domain will be created. | <code>string</code> |  | <code>&#34;example.org&#34;</code> |
-| [prefix](variables.tf#L33) | Customer name to use as prefix for resources' naming. | <code>string</code> |  | <code>&#34;test-dns&#34;</code> |
-| [project_services](variables.tf#L39) | Service APIs enabled by default. | <code>list&#40;string&#41;</code> |  | <code title="&#91;&#10;  &#34;compute.googleapis.com&#34;,&#10;  &#34;dns.googleapis.com&#34;,&#10;&#93;">&#91;&#8230;&#93;</code> |
-| [teams](variables.tf#L53) | List of application teams requiring their own Cloud DNS instance. | <code>list&#40;string&#41;</code> |  | <code title="&#91;&#10;  &#34;team1&#34;,&#10;  &#34;team2&#34;,&#10;&#93;">&#91;&#8230;&#93;</code> |
+| [project_services](variables.tf#L42) | Service APIs enabled by default. | <code>list&#40;string&#41;</code> |  | <code title="&#91;&#10;  &#34;compute.googleapis.com&#34;,&#10;  &#34;dns.googleapis.com&#34;,&#10;&#93;">&#91;&#8230;&#93;</code> |
+| [teams](variables.tf#L56) | List of application teams requiring their own Cloud DNS instance. | <code>list&#40;string&#41;</code> |  | <code title="&#91;&#10;  &#34;team1&#34;,&#10;  &#34;team2&#34;,&#10;&#93;">&#91;&#8230;&#93;</code> |
 
 ## Outputs
 

blueprints/cloud-operations/dns-shared-vpc/examples/shared-vpc-example/variables.tf

@@ -50,8 +50,12 @@ variable "billing_account" {
 }
 
 variable "prefix" {
-  description = "Customer name to use as prefix for resources' naming."
-  default     = "test-dns"
+  description = "Prefix used for resource names."
+  type        = string
+  validation {
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty."
+  }
 }
 
 variable "dns_domain" {

blueprints/cloud-operations/dns-shared-vpc/variables.tf

@@ -31,9 +31,12 @@ variable "folder_id" {
 }
 
 variable "prefix" {
-  description = "Customer name to use as prefix for resources' naming."
+  description = "Prefix used for resource names."
   type        = string
-  default     = "test-dns"
+  validation {
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty."
+  }
 }
 
 variable "project_services" {

blueprints/cloud-operations/network-dashboard/README.md

@@ -92,12 +92,12 @@ If you are interested in this and/or would like to contribute, please contact le
 | [billing_account](variables.tf#L17) | The ID of the billing account to associate this project with | <code></code> | ✓ |  |
 | [monitored_projects_list](variables.tf#L36) | ID of the projects to be monitored (where limits and quotas data will be pulled) | <code>list&#40;string&#41;</code> | ✓ |  |
 | [organization_id](variables.tf#L46) | The organization id for the associated services | <code></code> | ✓ |  |
-| [prefix](variables.tf#L50) | Customer name to use as prefix for monitoring project | <code></code> | ✓ |  |
+| [prefix](variables.tf#L50) | Prefix used for resource names. | <code>string</code> | ✓ |  |
 | [cf_version](variables.tf#L21) | Cloud Function version 2nd Gen or 1st Gen. Possible options: 'V1' or 'V2'.Use CFv2 if your Cloud Function timeouts after 9 minutes. By default it is using CFv1. | <code></code> |  | <code>V1</code> |
 | [monitored_folders_list](variables.tf#L30) | ID of the projects to be monitored (where limits and quotas data will be pulled) | <code>list&#40;string&#41;</code> |  | <code>&#91;&#93;</code> |
 | [monitoring_project_id](variables.tf#L41) | Monitoring project where the dashboard will be created and the solution deployed; a project will be created if set to empty string | <code></code> |  |  |
-| [project_monitoring_services](variables.tf#L54) | Service APIs enabled in the monitoring project if it will be created. | <code></code> |  | <code title="&#91;&#10;  &#34;artifactregistry.googleapis.com&#34;,&#10;  &#34;cloudasset.googleapis.com&#34;,&#10;  &#34;cloudbilling.googleapis.com&#34;,&#10;  &#34;cloudbuild.googleapis.com&#34;,&#10;  &#34;cloudfunctions.googleapis.com&#34;,&#10;  &#34;cloudresourcemanager.googleapis.com&#34;,&#10;  &#34;cloudscheduler.googleapis.com&#34;,&#10;  &#34;compute.googleapis.com&#34;,&#10;  &#34;iam.googleapis.com&#34;,&#10;  &#34;iamcredentials.googleapis.com&#34;,&#10;  &#34;logging.googleapis.com&#34;,&#10;  &#34;monitoring.googleapis.com&#34;,&#10;  &#34;pubsub.googleapis.com&#34;,&#10;  &#34;run.googleapis.com&#34;,&#10;  &#34;servicenetworking.googleapis.com&#34;,&#10;  &#34;serviceusage.googleapis.com&#34;,&#10;  &#34;storage-component.googleapis.com&#34;&#10;&#93;">&#91;&#8230;&#93;</code> |
-| [region](variables.tf#L76) | Region used to deploy the cloud functions and scheduler | <code></code> |  | <code>europe-west1</code> |
-| [schedule_cron](variables.tf#L81) | Cron format schedule to run the Cloud Function. Default is every 10 minutes. | <code></code> |  | <code>&#42;&#47;10 &#42; &#42; &#42; &#42;</code> |
+| [project_monitoring_services](variables.tf#L59) | Service APIs enabled in the monitoring project if it will be created. | <code></code> |  | <code title="&#91;&#10;  &#34;artifactregistry.googleapis.com&#34;,&#10;  &#34;cloudasset.googleapis.com&#34;,&#10;  &#34;cloudbilling.googleapis.com&#34;,&#10;  &#34;cloudbuild.googleapis.com&#34;,&#10;  &#34;cloudfunctions.googleapis.com&#34;,&#10;  &#34;cloudresourcemanager.googleapis.com&#34;,&#10;  &#34;cloudscheduler.googleapis.com&#34;,&#10;  &#34;compute.googleapis.com&#34;,&#10;  &#34;iam.googleapis.com&#34;,&#10;  &#34;iamcredentials.googleapis.com&#34;,&#10;  &#34;logging.googleapis.com&#34;,&#10;  &#34;monitoring.googleapis.com&#34;,&#10;  &#34;pubsub.googleapis.com&#34;,&#10;  &#34;run.googleapis.com&#34;,&#10;  &#34;servicenetworking.googleapis.com&#34;,&#10;  &#34;serviceusage.googleapis.com&#34;,&#10;  &#34;storage-component.googleapis.com&#34;&#10;&#93;">&#91;&#8230;&#93;</code> |
+| [region](variables.tf#L81) | Region used to deploy the cloud functions and scheduler | <code></code> |  | <code>europe-west1</code> |
+| [schedule_cron](variables.tf#L86) | Cron format schedule to run the Cloud Function. Default is every 10 minutes. | <code></code> |  | <code>&#42;&#47;10 &#42; &#42; &#42; &#42;</code> |
 
 <!-- END TFDOC -->

blueprints/cloud-operations/network-dashboard/cloud-function/metrics/limits.py

@@ -187,7 +187,7 @@ def count_effective_limit(config, project_id, network_dict, usage_metric_name,
   for peered_network in network_dict['peerings']:
     if 'usage' not in peered_network:
       print(
-          f"Can not add metrics for peered network in projects/{project_id} as no usage metrics exist due to missing permissions"
+          f"Cannot add metrics for peered network in projects/{project_id} as no usage metrics exist due to missing permissions"
       )
       continue
     peering_group_usage += peered_network['usage']

blueprints/cloud-operations/network-dashboard/tests/variables.tf

@@ -23,7 +23,12 @@ variable "billing_account" {
 }
 
 variable "prefix" {
-  description = "Customer name to use as prefix for resources' naming"
+  description = "Prefix used for resource names."
+  type        = string
+  validation {
+    condition     = var.prefix != ""
+    error_message = "Prefix cannot be empty."
+  }
 }
 
 variable "project_vm_services" {