A High-level outline of the project structure:
Provider Configuration: Define the GCP provider to authenticate and connect to your GCP project.
Network: Create a VPC (Virtual Private Cloud) network for the project.
Subnets: Define subnets for each component (Palo Alto, FortiGate, other network devices, etc.).
Firewall Rules: Set up firewall rules to allow/deny traffic between components.
Cloud Routers: Create an Express Router and configure BGP (Border Gateway Protocol) for dynamic routing.
VPN Gateway: Set up a VPN gateway for site-to-site connectivity.
Instances: Deploy VM instances for Palo Alto, FortiGate, and other network devices.
Load Balancers: Configure load balancers for high availability.
**GCP Terraform network project sample code**
# Define the GCP provider
provider "google" {
credentials = file("<path_to_your_service_account_key_json>")
project = "your-gcp-project-id"
region = "us-central1"
}
# Create a VPC network
resource "google_compute_network" "my_network" {
name = "my-network"
}
# Create a subnet for Palo Alto firewall
resource "google_compute_subnetwork" "palo_alto_subnet" {
name = "palo-alto-subnet"
region = "us-central1"
network = google_compute_network.my_network.self_link
ip_cidr_range = "10.0.1.0/24"
}
# Create a subnet for FortiGate firewall
resource "google_compute_subnetwork" "fortigate_subnet" {
name = "fortigate-subnet"
region = "us-central1"
network = google_compute_network.my_network.self_link
ip_cidr_range = "10.0.2.0/24"
}
# Create a firewall rule to allow SSH access to VMs
resource "google_compute_firewall" "allow_ssh" {
name = "allow-ssh"
network = google_compute_network.my_network.self_link
allow {
protocol = "tcp"
ports = ["22"]
}
source_ranges = ["0.0.0.0/0"]
}
# Create VM instance for Palo Alto firewall
resource "google_compute_instance" "palo_alto_vm" {
name = "palo-alto-vm"
machine_type = "n1-standard-2"
zone = "us-central1-a"
boot_disk {
initialize_params {
image = "projects/debian-cloud/global/images/debian-10-buster-v20220110"
}
}
network_interface {
network = google_compute_network.my_network.id
access_config {
// Ephemeral IP
}
}
metadata_startup_script = "echo 'Hello, Palo Alto!' > index.html && python -m SimpleHTTPServer 80"
}
# Create VM instance for FortiGate firewall
resource "google_compute_instance" "fortigate_vm" {
name = "fortigate-vm"
machine_type = "n1-standard-2"
zone = "us-central1-a"
boot_disk {
initialize_params {
image = "projects/debian-cloud/global/images/debian-10-buster-v20220110"
}
}
network_interface {
network = google_compute_network.my_network.id
access_config {
// Ephemeral IP
}
}
metadata_startup_script = "echo 'Hello, FortiGate!' > index.html && python -m SimpleHTTPServer 80"
}
