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GCP Google Cloud Platform - Terraform Meta-Argument Provider

Step-01: Introduction

Step-02: c1-versions.tf

# Terraform Settings Block
terraform {
  required_version = ">= 1.8"
  required_providers {
    google = {
      source = "hashicorp/google"
      version = ">= 5.34.0"
    }
  }
}

# Terraform Provider-1: us-central1
provider "google" {
  project = "gcplearn9"
  region = "us-central1"
  alias = "us-central1"    
}

# Terraform Provider-2: europe-west1
provider "google" {
  project = "gcplearn9"
  region = "europe-west1"
  alias = "europe-west1"  
}

Step-03: c3-vpc.tf

# Resource: VPC
resource "google_compute_network" "myvpc" {
  project = "gcplearn9"
  name = "vpc1"
  auto_create_subnetworks = false   
}

# Resource: Subnet1
resource "google_compute_subnetwork" "mysubnet1" {
  provider = google.us-central1   # Define provider to use
  name = "subnet1"
  ip_cidr_range = "10.128.0.0/20"
  network = google_compute_network.myvpc.id 
}

# Resource: Subnet2
resource "google_compute_subnetwork" "mysubnet2" {
  provider = google.europe-west1   # Define provider to use
  name = "subnet2"
  ip_cidr_range = "10.132.0.0/20"
  network = google_compute_network.myvpc.id 
}

Step-04: Execute Terraform Commands

# Terraform Initialize
terraform init

# Terraform Validate
terraform validate

# Terraform Plan
terraform plan

# Terraform Apply
terraform apply
Observation: 
1. Subnets will be created in both regions

Step-05: Clean-Up

# Terraform Destroy
terraform destroy --auto-approve
[or]
terraform apply --destroy --auto-approve

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