templates/tfengine/components/devops/main.tf

{{- /* Copyright 2021 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. */ -}}

# This folder contains Terraform resources to setup the devops project, which includes:
# - The project itself,
# - APIs to enable,
# - Deletion lien,
# - Project level IAM permissions for the project owners,
# - A Cloud Storage bucket to store Terraform states for all deployments,
# - Admin permission at {{.parent_type}} level,
# - Cloud Identity groups and memberships, if requested.

{{- if or (not (get .admins_group "exists" false)) (not (get .project.owners_group "exists" false))}}

# Required when using end-user ADCs (Application Default Credentials) to manage Cloud Identity groups and memberships.
provider "google-beta" {
  user_project_override = true
  billing_project       = "{{.project.project_id}}"
}
{{- end}}

# Create the project, enable APIs, and create the deletion lien, if specified.
module "project" {
  source  = "terraform-google-modules/project-factory/google"
  version = "~> 14.4.0"

  name            = "{{.project.project_id}}"
  {{- if eq .parent_type "organization"}}
  org_id          = "{{.parent_id}}"
  {{- else}}
  org_id          = ""
  folder_id       = "{{.parent_id}}"
  {{- end}}
  billing_account = "{{.billing_account}}"
  lien            = {{get . "enable_lien" true}}
  # Create and keep default service accounts when certain APIs are enabled.
  default_service_account = "keep"
  # Do not create an additional project service account to be used for Compute Engine.
  create_project_sa = false
  activate_apis = [
    "cloudbuild.googleapis.com",
    "cloudidentity.googleapis.com",
    {{range get . "project.apis" -}}
    "{{.}}",
    {{end -}}
  ]
  {{if $labels := merge (get $ "labels") (get . "labels") -}}
  labels = {
    {{range $k, $v := $labels -}}
    {{$k}} = "{{$v}}"
    {{end -}}
  }
  {{end -}}
}

# Terraform state bucket, hosted in the devops project.
module "state_bucket" {
source  = "terraform-google-modules/cloud-storage/google//modules/simple_bucket"
  version = "~> 5.0.0"

  name       = "{{.state_bucket}}"
  project_id = module.project.project_id
  location   = "{{.storage_location}}"
}

{{- if not (get .project.owners_group "exists" false)}}

# Devops project owners group.
module "owners_group" {
  source  = "terraform-google-modules/group/google"
  version = "~> 0.3"

  id = "{{.project.owners_group.id}}"
  customer_id = "{{.project.owners_group.customer_id}}"
  {{- if has .project.owners_group "display_name"}}
  display_name = "{{.project.owners_group.display_name}}"
  {{- else}}
  display_name = "{{regexReplaceAll "@.*" .project.owners_group.id ""}}"
  {{- end}}
  {{hclField .project.owners_group "description" -}}
  {{hclField .project.owners_group "owners" -}}
  {{hclField .project.owners_group "managers" -}}
  {{hclField .project.owners_group "members" -}}
  depends_on = [
    module.project
  ]
}

# The group is not ready for IAM bindings right after creation. Wait for
# a while before it is used.
resource "time_sleep" "owners_wait" {
  depends_on = [
    module.owners_group,
  ]
  create_duration = "15s"
}
{{- end}}

# Project level IAM permissions for devops project owners.
resource "google_project_iam_binding" "devops_owners" {
  project = module.project.project_id
  role    = "roles/owner"
  {{- if get .project.owners_group "exists" false}}
  members = ["group:{{.project.owners_group.id}}"]
  {{- else}}
  members = ["group:${module.owners_group.id}"]
  depends_on = [time_sleep.owners_wait]
  {{- end}}
}

{{- if not (get .admins_group "exists" false)}}

# Admins group for at {{.parent_type}} level.
module "admins_group" {
  source  = "terraform-google-modules/group/google"
  version = "~> 0.3"

  id = "{{.admins_group.id}}"
  customer_id = "{{.admins_group.customer_id}}"
  {{- if has .admins_group "display_name"}}
  display_name = "{{.admins_group.display_name}}"
  {{- else}}
  display_name = "{{regexReplaceAll "@.*" .admins_group.id ""}}"
  {{- end}}
  {{hclField .admins_group "description" -}}
  {{hclField .admins_group "owners" -}}
  {{hclField .admins_group "managers" -}}
  {{hclField .admins_group "members" -}}
  depends_on = [
    module.project
  ]
}

# The group is not ready for IAM bindings right after creation. Wait for
# a while before it is used.
resource "time_sleep" "admins_wait" {
  depends_on = [
    module.admins_group,
  ]
  create_duration = "15s"
}
{{- end}}

# Admin permission at {{.parent_type}} level.
resource "google_{{.parent_type}}_iam_member" "admin" {
  {{- if eq .parent_type "organization"}}
  org_id = "{{.parent_id}}"
  {{- else}}
  folder = "folders/{{.parent_id}}"
  {{- end}}
  role   = "roles/resourcemanager.{{.parent_type}}Admin"
  {{- if get .admins_group "exists" false}}
  member = "group:{{.admins_group.id}}"
  {{- else}}
  member = "group:${module.admins_group.id}"
  depends_on = [time_sleep.admins_wait]
  {{- end}}
}