terraform-google-bootstrap

The purpose of this module is to help bootstrap a GCP organization, creating all the required GCP resources & permissions to start using the Cloud Foundation Toolkit (CFT). For users who want to use Cloud Build & Cloud Source Repos for foundations code, there is also a submodule to help bootstrap all the required resources to do this.

Usage

Basic usage of this module is as follows:

module "bootstrap" {
  source  = "terraform-google-modules/bootstrap/google"
  version = "~> 1.3"

  org_id               = "<ORGANIZATION_ID>"
  billing_account      = "<BILLING_ACCOUNT_ID>"
  group_org_admins     = "gcp-organization-admins@example.com"
  group_billing_admins = "gcp-billing-admins@example.com"
  default_region       = "australia-southeast1"
}

Functional examples are included in the examples directory.

Features

The Organization Bootstrap module will take the following actions:

1. Create a new GCP seed project using project_prefix.
2. Enable APIs in the seed project using activate_apis
3. Create a new service account for terraform in seed project
4. Create GCS bucket for Terraform state and grant access to service account
5. Grant IAM permissions required for CFT modules & Organization setup
   1. Overwrite organization wide project creator and billing account creator roles
   2. Grant Organization permissions to service account using sa_org_iam_permissions
   3. Grant access to billing account for service account
   4. Grant Organization permissions to group_org_admins using org_admins_org_iam_permissions
   5. Grant billing permissions to group_billing_admins
   6. (optional) Permissions required for service account impersonation using sa_enable_impersonation

For the cloudbuild submodule, see the README cloudbuild.

Inputs

Name	Description	Type	Default	Required
activate_apis	List of APIs to enable in the seed project.	list(string)	<list>	no
billing_account	The ID of the billing account to associate projects with.	string	n/a	yes
default_region	Default region to create resources where applicable.	string	"us-central1"	no
folder_id	The ID of a folder to host this project	string	""	no
grant_billing_user	Grant roles/billing.user role to CFT service account	bool	"true"	no
group_billing_admins	Google Group for GCP Billing Administrators	string	n/a	yes
group_org_admins	Google Group for GCP Organization Administrators	string	n/a	yes
org_admins_org_iam_permissions	List of permissions granted to the group supplied in group_org_admins variable across the GCP organization.	list(string)	<list>	no
org_id	GCP Organization ID	string	n/a	yes
org_project_creators	Additional list of members to have project creator role accross the organization. Prefix of group: user: or serviceAccount: is required.	list(string)	<list>	no
parent_folder	GCP parent folder ID in the form folders/{id}	string	""	no
project_labels	Labels to apply to the project.	map(string)	<map>	no
project_prefix	Name prefix to use for projects created.	string	"cft"	no
sa_enable_impersonation	Allow org_admins group to impersonate service account & enable APIs required.	bool	"false"	no
sa_org_iam_permissions	List of permissions granted to Terraform service account across the GCP organization.	list(string)	<list>	no
skip_gcloud_download	Whether to skip downloading gcloud (assumes gcloud is already available outside the module)	bool	"true"	no
storage_bucket_labels	Labels to apply to the storage bucket.	map(string)	<map>	no

Outputs

Name	Description
gcs_bucket_tfstate	Bucket used for storing terraform state for foundations pipelines in seed project.
seed_project_id	Project where service accounts and core APIs will be enabled.
terraform_sa_email	Email for privileged service account for Terraform.
terraform_sa_name	Fully qualified name for privileged service account for Terraform.

Requirements

Software

• gcloud sdk >= 206.0.0
• Terraform >= 0.12.6
• [terraform-provider-google] plugin 2.1.x
• [terraform-provider-google-beta] plugin 2.1.x

Permissions

• roles/resourcemanager.organizationAdmin on GCP Organization
• roles/billing.admin on supplied billing account
• Account running terraform should be a member of group provided in group_org_admins variable, otherwise they will loose roles/resourcemanager.projectCreator access. Additional members can be added by using the org_project_creators variable.

Credentials

For users interested in using service account impersonation which this module helps enable with sa_enable_impersonation, please see this blog post which explains how it works.

APIs

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

• Google Cloud Resource Manager API: cloudresourcemanager.googleapis.com
• Google Cloud Billing API: cloudbilling.googleapis.com
• Google Cloud IAM API: iam.googleapis.com
• Google Cloud Storage API storage-api.googleapis.com
• Google Cloud Service Usage API: serviceusage.googleapis.com

This API can be enabled in the default project created during establishing an organization.

Contributing

Refer to the contribution guidelines for information on contributing to this module.