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Step-01: Introduction

Step-02: c5-datasource.tf

# Terraform Datasources
data "google_compute_zones" "available" {    
  status = "UP"
}

# Output value
output "compute_zones" {
  description = "List of compute zones"
  value = data.google_compute_zones.available.names
}

Step-03: c6-01-vminstance.tf

# Resource Block: Create a single Compute Engine instance
resource "google_compute_instance" "myapp1" {
  # Meta-Argument: count
  count = 2
  name         = "myapp1-vm-${count.index}"
  machine_type = var.machine_type
  zone         = data.google_compute_zones.available.names[count.index]
  tags        = [tolist(google_compute_firewall.fw_ssh.target_tags)[0], tolist(google_compute_firewall.fw_http.target_tags)[0]]

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-12"
    }
  }

  # Install Webserver
  metadata_startup_script = file("${path.module}/app1-webserver-install.sh")

  network_interface {
    subnetwork = google_compute_subnetwork.mysubnet.id   
    access_config {
      # Include this section to give the VM an external IP address
    }
  }
}

Step-04: Execute Terraform Commands

# Terraform Initialize
terraform init

# Terraform Validate
terraform validate

# Terraform Plan
terraform plan

# Terraform Apply
terraform apply

Step-05: Verify VM Instances

  • Go to Google Cloud -> Compute Engine -> VM Instances
  • Observation: VM Instances will be created in two different zones in a region

Step-06: Clean-Up

# Terraform Destroy
terraform destroy -auto-approve

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