Terraform providers

All the providers are categorized into 3 types.

• Official : Managed HashiCorp
• Verified : Developed by Community or enterprises and verified by HashiCorp
• Community : Developed by Community or enterprises

tip

Maintain the version specifcations in the terraform configuration

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.0"
    }
  }
}

provider "aws" {
  region = "us-east-1"
}

Version number syntax:

Syntax	Meaning
>= 3.0	Greater than or equal to 3.0
<= 3.0	Less than or equal to 3.0
~> 3.0	Any version in 3.X range
<=3.0 , >=2.5	Any version betweek 2.5 & 3.0 inclusive

• terraform init will download plugins associated with the providers into .terraform directory.
• terraform uses .terraform.lock.hcl as the dependency lock file.
• To upgrade the dependency lock file, run terraform init with upgrade flag

terraform init -upgrade

Mulit Region terraform providers

To handle AWS provider for multiple regions, use alias & provider as attribute in resourece

provider "aws" {
  region = "us-east-1" 
}

# Additional provider configuration for west coast region
provider "aws" {
  alias  = "west"
  region = "us-west-2"
}

resource "aws_instance" "east_ec2" {
  provider = "aws.west"
  # ...
}

resource "aws_instance" "west_ec2" {
  provider = "aws.west"
  # ...
}