Terraform examples for HA VPN gateways

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

If you are new to using Terraform for Google Cloud, see Get started with Terraform.

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.

ha_vpn_gateway_gcp_to_gcp/main.tf 
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 an external peer network

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.

external_vpn_gateway/main.tf 
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-1"
  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
}