Terraform examples for HA VPN gateways

You can use the following examples to deploy HA VPN gateways.

If you are new to using Terraform for Google Cloud, see the Get Started - Google Cloud page on the HashiCorp website.

Between VPCs

You can use Terraform resources to bring up a sample HA VPN gateway between Google Cloud networks. For information about this setup, see the primary setup guide.

resource "google_compute_ha_vpn_gateway" "ha_gateway1" {
  region   = "us-central1"
  name     = "ha-vpn-1"
  network  = google_compute_network.network1.id
}

resource "google_compute_ha_vpn_gateway" "ha_gateway2" {
  region   = "us-central1"
  name     = "ha-vpn-2"
  network  = google_compute_network.network2.id
}

resource "google_compute_network" "network1" {
  name                    = "network1"
  routing_mode            = "GLOBAL"
  auto_create_subnetworks = false
}

resource "google_compute_network" "network2" {
  name                    = "network2"
  routing_mode            = "GLOBAL"
  auto_create_subnetworks = false
}

resource "google_compute_subnetwork" "network1_subnet1" {
  name          = "ha-vpn-subnet-1"
  ip_cidr_range = "10.0.1.0/24"
  region        = "us-central1"
  network       = google_compute_network.network1.id
}

resource "google_compute_subnetwork" "network1_subnet2" {
  name          = "ha-vpn-subnet-2"
  ip_cidr_range = "10.0.2.0/24"
  region        = "us-west1"
  network       = google_compute_network.network1.id
}

resource "google_compute_subnetwork" "network2_subnet1" {
  name          = "ha-vpn-subnet-3"
  ip_cidr_range = "192.168.1.0/24"
  region        = "us-central1"
  network       = google_compute_network.network2.id
}

resource "google_compute_subnetwork" "network2_subnet2" {
  name          = "ha-vpn-subnet-4"
  ip_cidr_range = "192.168.2.0/24"
  region        = "us-east1"
  network       = google_compute_network.network2.id
}

resource "google_compute_router" "router1" {
  name     = "ha-vpn-router1"
  network  = google_compute_network.network1.name
  bgp {
    asn = 64514
  }
}

resource "google_compute_router" "router2" {
  name     = "ha-vpn-router2"
  network  = google_compute_network.network2.name
  bgp {
    asn = 64515
  }
}

resource "google_compute_vpn_tunnel" "tunnel1" {
  name                  = "ha-vpn-tunnel1"
  region                = "us-central1"
  vpn_gateway           = google_compute_ha_vpn_gateway.ha_gateway1.id
  peer_gcp_gateway      = google_compute_ha_vpn_gateway.ha_gateway2.id
  shared_secret         = "a secret message"
  router                = google_compute_router.router1.id
  vpn_gateway_interface = 0
}

resource "google_compute_vpn_tunnel" "tunnel2" {
  name                  = "ha-vpn-tunnel2"
  region                = "us-central1"
  vpn_gateway           = google_compute_ha_vpn_gateway.ha_gateway1.id
  peer_gcp_gateway      = google_compute_ha_vpn_gateway.ha_gateway2.id
  shared_secret         = "a secret message"
  router                = google_compute_router.router1.id
  vpn_gateway_interface = 1
}

resource "google_compute_vpn_tunnel" "tunnel3" {
  name                  = "ha-vpn-tunnel3"
  region                = "us-central1"
  vpn_gateway           = google_compute_ha_vpn_gateway.ha_gateway2.id
  peer_gcp_gateway      = google_compute_ha_vpn_gateway.ha_gateway1.id
  shared_secret         = "a secret message"
  router                = google_compute_router.router2.id
  vpn_gateway_interface = 0
}

resource "google_compute_vpn_tunnel" "tunnel4" {
  name                  = "ha-vpn-tunnel4"
  region                = "us-central1"
  vpn_gateway           = google_compute_ha_vpn_gateway.ha_gateway2.id
  peer_gcp_gateway      = google_compute_ha_vpn_gateway.ha_gateway1.id
  shared_secret         = "a secret message"
  router                = google_compute_router.router2.id
  vpn_gateway_interface = 1
}

resource "google_compute_router_interface" "router1_interface1" {
  name       = "router1-interface1"
  router     = google_compute_router.router1.name
  region     = "us-central1"
  ip_range   = "169.254.0.1/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel1.name
}

resource "google_compute_router_peer" "router1_peer1" {
  name                      = "router1-peer1"
  router                    = google_compute_router.router1.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.0.2"
  peer_asn                  = 64515
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router1_interface1.name
}

resource "google_compute_router_interface" "router1_interface2" {
  name       = "router1-interface2"
  router     = google_compute_router.router1.name
  region     = "us-central1"
  ip_range   = "169.254.1.2/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel2.name
}

resource "google_compute_router_peer" "router1_peer2" {
  name                      = "router1-peer2"
  router                    = google_compute_router.router1.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.1.1"
  peer_asn                  = 64515
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router1_interface2.name
}

resource "google_compute_router_interface" "router2_interface1" {
  name       = "router2-interface1"
  router     = google_compute_router.router2.name
  region     = "us-central1"
  ip_range   = "169.254.0.2/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel3.name
}

resource "google_compute_router_peer" "router2_peer1" {
  name                      = "router2-peer1"
  router                    = google_compute_router.router2.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.0.1"
  peer_asn                  = 64514
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router2_interface1.name
}

resource "google_compute_router_interface" "router2_interface2" {
  name       = "router2-interface2"
  router     = google_compute_router.router2.name
  region     = "us-central1"
  ip_range   = "169.254.1.1/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel4.name
}

resource "google_compute_router_peer" "router2_peer2" {
  name                      = "router2-peer2"
  router                    = google_compute_router.router2.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.1.2"
  peer_asn                  = 64514
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router2_interface2.name
}

To external peer

You can use Terraform resources to bring up a sample HA VPN gateway to an external peer. For information about this setup, see the primary setup guide.

For a multicloud setup example, see Automated Network Deployment: Building a VPN between Google Cloud and AWS with Terraform.

resource "google_compute_ha_vpn_gateway" "ha_gateway" {
  region   = "us-central1"
  name     = "ha-vpn"
  network  = google_compute_network.network.id
}

resource "google_compute_external_vpn_gateway" "external_gateway" {
  name            = "external-gateway"
  redundancy_type = "SINGLE_IP_INTERNALLY_REDUNDANT"
  description     = "An externally managed VPN gateway"
  interface {
    id         = 0
    ip_address = "8.8.8.8"
  }
}

resource "google_compute_network" "network" {
  name                    = "network"
  routing_mode            = "GLOBAL"
  auto_create_subnetworks = false
}

resource "google_compute_subnetwork" "network_subnet1" {
  name          = "ha-vpn-subnet-1"
  ip_cidr_range = "10.0.1.0/24"
  region        = "us-central1"
  network       = google_compute_network.network.id
}

resource "google_compute_subnetwork" "network_subnet2" {
  name          = "ha-vpn-subnet-2"
  ip_cidr_range = "10.0.2.0/24"
  region        = "us-west1"
  network       = google_compute_network.network.id
}

resource "google_compute_router" "router1" {
  name     = "ha-vpn-router1"
  network  = google_compute_network.network.name
  bgp {
    asn = 64514
  }
}

resource "google_compute_vpn_tunnel" "tunnel1" {
  name                            = "ha-vpn-tunnel1"
  region                          = "us-central1"
  vpn_gateway                     = google_compute_ha_vpn_gateway.ha_gateway.id
  peer_external_gateway           = google_compute_external_vpn_gateway.external_gateway.id
  peer_external_gateway_interface = 0
  shared_secret                   = "a secret message"
  router                          = google_compute_router.router1.id
  vpn_gateway_interface           = 0
}

resource "google_compute_vpn_tunnel" "tunnel2" {
  name                            = "ha-vpn-tunnel2"
  region                          = "us-central1"
  vpn_gateway                     = google_compute_ha_vpn_gateway.ha_gateway.id
  peer_external_gateway           = google_compute_external_vpn_gateway.external_gateway.id
  peer_external_gateway_interface = 0
  shared_secret                   = "a secret message"
  router                          = " ${google_compute_router.router1.id}"
  vpn_gateway_interface           = 1
}

resource "google_compute_router_interface" "router1_interface1" {
  name       = "router1-interface1"
  router     = google_compute_router.router1.name
  region     = "us-central1"
  ip_range   = "169.254.0.1/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel1.name
}

resource "google_compute_router_peer" "router1_peer1" {
  name                      = "router1-peer1"
  router                    = google_compute_router.router1.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.0.2"
  peer_asn                  = 64515
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router1_interface1.name
}

resource "google_compute_router_interface" "router1_interface2" {
  name       = "router1-interface2"
  router     = google_compute_router.router1.name
  region     = "us-central1"
  ip_range   = "169.254.1.1/30"
  vpn_tunnel = google_compute_vpn_tunnel.tunnel2.name
}

resource "google_compute_router_peer" "router1_peer2" {
  name                      = "router1-peer2"
  router                    = google_compute_router.router1.name
  region                    = "us-central1"
  peer_ip_address           = "169.254.1.2"
  peer_asn                  = 64515
  advertised_route_priority = 100
  interface                 = google_compute_router_interface.router1_interface2.name
}