rectory Structureproject/
├── aws/
│   ├── main.tf
│   ├── variables.tf
│   └── outputs.tf
├── azure/
│   ├── main.tf
│   ├── variables.tf
│   └── outputs.tf
├── gcp/
│   ├── main.tf
│   ├── variables.tf
│   └── outputs.tf
└── main.tfMain Terraform Configuration (main.tf)# Main Terraform configuration for multi-cloud provisioning

# Define providers for AWS, Azure, and GCP
provider "aws" {
  region = "us-east-1" # Specify your AWS region
}

provider "azurerm" {
  features {}
}

provider "google" {
  project = "your-gcp-project-id"
  region  = "us-central1" # Specify your GCP region
}

# Include configurations for AWS, Azure, and GCP modules
module "aws_infrastructure" {
  source = "./aws"
}

module "azure_infrastructure" {
  source = "./azure"
}

module "gcp_infrastructure" {
  source = "./gcp"
}AWS Configuration (aws/main.tf)# AWS resources configuration
resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"

  tags = {
    Name = "example-instance"
  }
}

# Define variables
variable "aws_region" {
  default = "us-east-1"
}

# Define outputs
output "aws_instance_public_ip" {
  value = aws_instance.example.public_ip
}Azure Configuration (azure/main.tf)# Azure resources configuration
resource "azurerm_virtual_machine" "example" {
  name                  = "example-vm"
  location              = "East US"
  resource_group_name   = "example-resources"
  vm_size               = "Standard_DS1_v2"

  storage_image_reference {
    publisher = "Canonical"
    offer     = "UbuntuServer"
    sku       = "16.04-LTS"
    version   = "latest"
  }

  os_profile {
    computer_name  = "hostname"
    admin_username = "adminuser"

    admin_ssh_key {
      username   = "adminuser"
      public_key = file("~/.ssh/id_rsa.pub")
    }
  }

  tags = {
    environment = "production"
  }
}

# Define variables
variable "azure_location" {
  default = "East US"
}

# Define outputs
output "azure_vm_public_ip" {
  value = azurerm_virtual_machine.example.network_interface_ids[0]
}GCP Configuration (gcp/main.tf)# GCP resources configuration
resource "google_compute_instance" "example" {
  name         = "example-instance"
  machine_type = "e2-medium"
  zone         = "us-central1-a"

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-10"
    }
  }

  network_interface {
    network = "default"
    access_config {
      // Ephemeral IP
    }
  }

  tags = ["web", "dev"]

  metadata = {
    ssh-keys = "your-user:${file("~/.ssh/id_rsa.pub")}"
  }
}

# Define variables
variable "gcp_zone" {
  default = "us-central1-a"
}

# Define outputs
output "gcp_instance_public_ip" {
  value = google_compute_instance.example.network_interface[0].access_config[0].nat_ip
}