224 lines
6.9 KiB
HCL
224 lines
6.9 KiB
HCL
/**
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* Copyright 2023 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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# tfdoc:file:description Workload Identity Federation configurations for CI/CD.
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locals {
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_file_prefix = "tenants/${var.tenant_config.short_name}"
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# derive identity pool names from identity providers for easy reference
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cicd_identity_pools = {
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for k, v in local.cicd_identity_providers :
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k => split("/providers/", v.name)[0]
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}
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# merge org-level and tenant-level identity providers
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cicd_identity_providers = merge(
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var.automation.federated_identity_providers,
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{
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for k, v in google_iam_workload_identity_pool_provider.default :
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k => {
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issuer = local.identity_providers[k].issuer
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issuer_uri = local.identity_providers[k].issuer_uri
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name = v.name
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principal_tpl = local.identity_providers[k].principal_tpl
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principalset_tpl = local.identity_providers[k].principalset_tpl
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}
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})
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# filter CI/CD repositories to only keep valid ones
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cicd_repositories = {
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for k, v in coalesce(var.cicd_repositories, {}) : k => v
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if(
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v != null
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&&
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(
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try(v.type, null) == "sourcerepo"
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||
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contains(
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keys(local.cicd_identity_providers),
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coalesce(try(v.identity_provider, null), ":")
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)
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)
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&&
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fileexists(
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format("${path.module}/templates/workflow-%s.yaml", try(v.type, ""))
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)
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)
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}
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}
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# tenant bootstrap runs in the org scope and uses top-level automation project
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module "automation-tf-cicd-repo-bootstrap" {
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source = "../../../modules/source-repository"
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for_each = {
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for k, v in local.cicd_repositories : 0 => v
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if k == "bootstrap" && try(v.type, null) == "sourcerepo"
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}
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project_id = var.automation.project_id
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name = each.value.name
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iam = {
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"roles/source.admin" = [
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local.resman_sa
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]
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"roles/source.reader" = [
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module.automation-tf-cicd-sa-bootstrap["0"].iam_email
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]
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}
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triggers = {
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"fast-${var.tenant_config.short_name}-0-bootstrap" = {
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filename = ".cloudbuild/workflow.yaml"
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included_files = ["**/*tf", ".cloudbuild/workflow.yaml"]
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service_account = module.automation-tf-cicd-sa-bootstrap["0"].id
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substitutions = {}
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template = {
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project_id = null
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branch_name = each.value.branch
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repo_name = each.value.name
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tag_name = null
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}
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}
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}
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}
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module "automation-tf-cicd-sa-bootstrap" {
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source = "../../../modules/iam-service-account"
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for_each = {
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for k, v in local.cicd_repositories : 0 => v
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if k == "bootstrap" && try(v.type, null) != null
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}
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project_id = var.automation.project_id
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name = "bootstrap-1"
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display_name = "Terraform CI/CD ${var.tenant_config.short_name} bootstrap."
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prefix = local.prefix
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iam = (
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each.value.type == "sourcerepo"
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# used directly from the cloud build trigger for source repos
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? {}
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# impersonated via workload identity federation for external repos
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: {
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"roles/iam.workloadIdentityUser" = [
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each.value.branch == null
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? format(
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local.cicd_identity_providers[each.value.identity_provider].principalset_tpl,
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local.cicd_identity_pools[each.value.identity_provider],
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each.value.name
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)
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: format(
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local.cicd_identity_providers[each.value.identity_provider].principal_tpl,
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local.cicd_identity_pools[each.value.identity_provider],
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each.value.name,
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each.value.branch
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)
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]
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}
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)
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iam_project_roles = {
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(var.automation.project_id) = ["roles/logging.logWriter"]
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}
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iam_storage_roles = {
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(var.automation.outputs_bucket) = ["roles/storage.objectViewer"]
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}
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}
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module "automation-tf-org-resman-sa" {
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source = "../../../modules/iam-service-account"
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for_each = {
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for k, v in local.cicd_repositories : 0 => v
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if k == "bootstrap" && try(v.type, null) != null
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}
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project_id = var.automation.project_id
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name = local.resman_sa
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service_account_create = false
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iam_additive = {
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"roles/iam.serviceAccountTokenCreator" = compact([
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try(module.automation-tf-cicd-sa-bootstrap["0"].iam_email, null)
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])
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}
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}
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# tenant resman runs in the tenant scope and uses its own automation project
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module "automation-tf-cicd-repo-resman" {
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source = "../../../modules/source-repository"
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for_each = {
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for k, v in local.cicd_repositories : 0 => v
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if k == "resman" && try(v.type, null) == "sourcerepo"
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}
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project_id = module.automation-project.project_id
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name = each.value.name
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iam = {
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"roles/source.admin" = [
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module.automation-tf-resman-sa.iam_email
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]
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"roles/source.reader" = [
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module.automation-tf-cicd-sa-resman["0"].iam_email
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]
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}
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triggers = {
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fast-1-resman = {
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filename = ".cloudbuild/workflow.yaml"
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included_files = ["**/*tf", ".cloudbuild/workflow.yaml"]
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service_account = module.automation-tf-cicd-sa-resman["0"].id
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substitutions = {}
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template = {
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project_id = null
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branch_name = each.value.branch
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repo_name = each.value.name
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tag_name = null
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}
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}
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}
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}
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module "automation-tf-cicd-sa-resman" {
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source = "../../../modules/iam-service-account"
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for_each = {
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for k, v in local.cicd_repositories : 0 => v
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if k == "resman" && try(v.type, null) != null
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}
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project_id = module.automation-project.project_id
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name = "resman-1"
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display_name = "Terraform CI/CD resman."
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prefix = local.prefix
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iam = (
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each.value.type == "sourcerepo"
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# used directly from the cloud build trigger for source repos
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? {}
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# impersonated via workload identity federation for external repos
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: {
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"roles/iam.workloadIdentityUser" = [
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each.value.branch == null
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? format(
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local.cicd_identity_providers[each.value.identity_provider].principalset_tpl,
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local.cicd_identity_pools[each.value.identity_provider],
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each.value.name
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)
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: format(
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local.cicd_identity_providers[each.value.identity_provider].principal_tpl,
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local.cicd_identity_pools[each.value.identity_provider],
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each.value.name,
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each.value.branch
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)
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]
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}
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)
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iam_project_roles = {
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(module.automation-project.project_id) = ["roles/logging.logWriter"]
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}
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iam_storage_roles = {
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(module.automation-tf-output-gcs.name) = ["roles/storage.objectViewer"]
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}
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}
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