08-04-provider

Terraform Meta Argument: provider

provider Meta Argument

• provider helps you to Use Multiple Providers in Terraform

• You can use multiple providers within the same configuration to manage resources in different cloud regions or service providers.

• Each provider definition specifies a different set of configuration parameters, enabling you to interact with multiple environments.

• Scenario: Suppose a you want to create 2 VPC in 2 different regions, or may be you want to launch EC2 instance in 2 different regions.

• Example:

  00_provider.tf

  terraform {
  required_version = "~> 1.0"
  required_providers {
      aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
      }
  }
  }
  
  # Define First AWS Provider (us-east-1)
  provider "aws" {
  region = "us-east-1"
  alias  = "us-east-nv"
  
  default_tags {
      tags = {
      Terraform = "yes"
      Region    = "N.Virginia"
      }
  }
  }
  
  # Defining Second AWS Provider (ap-south-1)
  provider "aws" {
  region = "ap-south-1"
  alias  = "ap-south-mumbai"
  
  default_tags {
      tags = {
      Terraform = "yes"
      Region    = "Mumbai"
      }
  }
  }

  01_vpc.tf

  # Create VPC in different regions using different providers
  
  # Create VPC in North-Virginia Region
  resource "aws_vpc" "nv-vpc" {
  # meta argument provider is used to specify which provider to be used
  provider   = aws.us-east-nv
  cidr_block = "10.1.0.0/16"
  
  tags = {
      Name = "North-Virginia-VPC"
  }
  }
  
  # Create VPC in Mumbai Region
  resource "aws_vpc" "mum-vpc" {
  # meta argument provider is used to specify which provider to be used
  provider   = aws.ap-south-mumbai
  cidr_block = "10.2.0.0/16"
  
  tags = {
      Name = "Mumbai-VPC"
  }
  }

• Lets Execute Terraform commands to understand resource behavior

  1. terraform init : Initialize terraform
  2. terraform validate : Validate terraform code
  3. terraform fmt : format terraform code
  4. terraform plan : Review the terraform plan
  5. terraform apply : Create Resources by terraform

     • Example of terraform apply

     • After you type yes to terraform apply prompt, terraform will start creating resources.

     • Once terraform completes the execution you should be able to check on your AWS Console four S3 buckets created successfully

     • VPC in us-east-1

     • VPC in ap-south-1

  Cleanup

  6. terraform destroy : destroy or delete Resources, Cleanup the resources we created

     • After you type yes to terraform destroy prompt, terraform will start destroying resources

     • Once terraform completes the execution you should be able to check on your AWS Console

References :

The Resource provider Meta-Argument