Terraform: using exportCustomRoutes when setting peering connection

Question

I am trying to set-up a peering connection between 2 VPC networks.

One network (the transit one) configures static routes, and I would like to have those propagated to the peered network.

Here's an example:

... data "google_compute_network" "transit-network" { project = var.transit_project_id name = var.transit_network } resource "google_compute_network_peering" "to-transit" { name = "${var.project}-transit" network = "${google_compute_network.vpc_network.self_link}" peer_network = data.google_compute_network.transit-network.self_link } resource "google_compute_network_peering" "from-transit" { name = "transit-${var.project}" network = data.google_compute_network.transit-network.self_link peer_network = "${google_compute_network.vpc_network.self_link}" } ... 

I know that this is simply through the GCP console, but, I can't find a way to do it through terraform.

From the API it seems that is by using the field peering.exchangeSubnetRoutes

EDIT: I have found the solution using the google-beta provider:

resource "google_compute_network_peering" "to-transit" { name = "${var.project}-transit" provider = "google-beta" network = "${google_compute_network.vpc_network.self_link}" peer_network = data.google_compute_network.transit-network.self_link import_custom_routes = true } resource "google_compute_network_peering" "from-transit" { name = "transit-${var.project}" provider = "google-beta" network = data.google_compute_network.transit-network.self_link peer_network = "${google_compute_network.vpc_network.self_link}" export_custom_routes = true } 

Using the beta provider I can specify import_custom_routes and export_custom_routes

Answer 1

Thanks! I've checked your solution on my project and it works for me with a slightly changed syntax:

resource "google_compute_network_peering" "vpc-network-to-transit-network" { provider = google-beta name = "vpc-network-to-transit-network" network = google_compute_network.vpc-network.self_link peer_network = google_compute_network.transit-network.self_link import_custom_routes = true } resource "google_compute_network_peering" "transit-network-to-vpc-network" { provider = google-beta name = "transit-network-to-vpc-network" network = google_compute_network.transit-network.self_link peer_network = google_compute_network.vpc-network.self_link export_custom_routes = true } 

and

$ gcloud compute networks peerings list NAME NETWORK PEER_PROJECT PEER_NETWORK PEER_MTU IMPORT_CUSTOM_ROUTES EXPORT_CUSTOM_ROUTES STATE STATE_DETAILS transit-network-to-vpc-network transit-network test-prj vpc-network False True ACTIVE [2020-11-13T02:05:12.111-08:00]: Connected. vpc-network-to-transit-network vpc-network test-prj transit-network True False ACTIVE [2020-11-13T02:05:29.387-08:00]: Connected. 

I used current version of Terraform:

$ terraform version Terraform v0.13.5 + provider registry.terraform.io/hashicorp/google v3.5.0 + provider registry.terraform.io/hashicorp/google-beta v3.47.0