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shared-vpc.tf
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shared-vpc.tf
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/**
* Copyright 2024 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.
*/
# tfdoc:file:description Shared VPC project-level configuration.
locals {
_svpc = var.shared_vpc_service_config
# read the list of service/roles for API service agents
_svpc_agent_config = yamldecode(file(
"${path.module}/sharedvpc-agent-iam.yaml"
))
# filter the list and keep services for which we need to create IAM bindings
_svpc_agent_config_filtered = [
for v in local._svpc_agent_config : v
if contains(local._svpc.service_iam_grants, v.service)
]
# normalize the list of service/role tuples
_svpc_agent_grants = flatten(flatten([
for v in local._svpc_agent_config_filtered : [
for service, roles in v.agents : [
for role in roles : { role = role, service = service }
]
]
]))
# normalize the service identity IAM bindings directly defined by the user
_svpc_service_iam = flatten([
for role, services in local._svpc.service_agent_iam : [
for service in services : { role = role, service = service }
]
])
svpc_host_config = {
enabled = coalesce(
try(var.shared_vpc_host_config.enabled, null), false
)
service_projects = coalesce(
try(var.shared_vpc_host_config.service_projects, null), []
)
}
# combine the two sets of service/role bindings defined above
svpc_service_iam = {
for b in setunion(local._svpc_service_iam, local._svpc_agent_grants) :
"${b.role}:${b.service}" => b
}
# normalize the service identity subnet IAM bindings
_svpc_service_subnet_iam = flatten([
for subnet, services in local._svpc.service_agent_subnet_iam : [
for service in services : [{
region = split("/", subnet)[0]
subnet = split("/", subnet)[1]
service = service
}]
]
])
svpc_service_subnet_iam = {
for v in local._svpc_service_subnet_iam :
"${v.region}:${v.subnet}:${v.service}" => v
}
# normalize the network user subnet IAM binding
_svpc_network_user_subnet_iam = (
local._svpc.network_subnet_users == null || local._svpc.host_project == null
? []
: flatten([
for subnet, members in local._svpc.network_subnet_users : [
for member in members : {
region = split("/", subnet)[0]
subnet = split("/", subnet)[1]
member = member
}
]
])
)
svpc_network_user_subnet_iam = {
for v in local._svpc_network_user_subnet_iam :
"${v.region}:${v.subnet}:${v.member}" => v
}
}
resource "google_compute_shared_vpc_host_project" "shared_vpc_host" {
provider = google-beta
count = local.svpc_host_config.enabled ? 1 : 0
project = local.project.project_id
depends_on = [google_project_service.project_services]
}
resource "google_compute_shared_vpc_service_project" "service_projects" {
provider = google-beta
for_each = toset(local.svpc_host_config.service_projects)
host_project = local.project.project_id
service_project = each.value
depends_on = [google_compute_shared_vpc_host_project.shared_vpc_host]
}
resource "google_compute_shared_vpc_service_project" "shared_vpc_service" {
provider = google-beta
count = var.shared_vpc_service_config.host_project != null ? 1 : 0
host_project = var.shared_vpc_service_config.host_project
service_project = local.project.project_id
}
resource "google_project_iam_member" "shared_vpc_host_robots" {
for_each = local.svpc_service_iam
project = var.shared_vpc_service_config.host_project
role = each.value.role
member = try(local.aliased_service_agents[each.value.service].iam_email, each.value.service)
depends_on = [
google_project_service.project_services,
google_project_service_identity.default,
google_project_default_service_accounts.default_service_accounts,
data.google_bigquery_default_service_account.bq_sa,
data.google_storage_project_service_account.gcs_sa,
]
}
resource "google_project_iam_member" "shared_vpc_host_iam" {
for_each = toset(var.shared_vpc_service_config.network_users)
project = var.shared_vpc_service_config.host_project
role = "roles/compute.networkUser"
member = each.value
depends_on = []
}
resource "google_compute_subnetwork_iam_member" "shared_vpc_host_robots" {
for_each = local.svpc_service_subnet_iam
project = var.shared_vpc_service_config.host_project
region = each.value.region
subnetwork = each.value.subnet
role = "roles/compute.networkUser"
member = try(local.aliased_service_agents[each.value.service].iam_email, each.value.service)
depends_on = [
google_project_service.project_services,
google_project_service_identity.default,
google_project_default_service_accounts.default_service_accounts,
data.google_bigquery_default_service_account.bq_sa,
data.google_storage_project_service_account.gcs_sa,
]
}
resource "google_compute_subnetwork_iam_member" "shared_vpc_host_subnets_iam" {
for_each = local.svpc_network_user_subnet_iam
project = var.shared_vpc_service_config.host_project
region = each.value.region
subnetwork = each.value.subnet
role = "roles/compute.networkUser"
member = each.value.member
}