Terraform and ACM (AWS Certificate Manager)

acm.tf

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.48"
    }
  }

  required_version = ">= 1.0.0"
}

variable "domain_name" {
  description = "domain name without leading dot or without www"
  type        = string
  default     = "example.com"
}

variable "profile" {
  description = "AWS user with ACM and Route53 permissions"
  type        = string
  default     = "default"
}

variable "region" {
  description = "AWS Region for ACM"
  type        = string
  default     = "us-east-1"
}

provider "aws" {
  profile = var.profile
  region  = var.region
}

resource "aws_acm_certificate" "myawsdomain" {
  domain_name               = var.domain_name
  validation_method         = "DNS"
  subject_alternative_names = [format("*.%s", var.domain_name)]
  lifecycle {
    create_before_destroy = true
  }
}

data "aws_route53_zone" "selected" {
  name         = format("%s.", var.domain_name)
  private_zone = false
}

resource "aws_route53_record" "myawsdomain" {
  for_each = {
    for dvo in aws_acm_certificate.myawsdomain.domain_validation_options : dvo.domain_name => {
      name   = dvo.resource_record_name
      record = dvo.resource_record_value
      type   = dvo.resource_record_type
    }
  }

  allow_overwrite = true
  name            = each.value.name
  records         = [each.value.record]
  ttl             = 60
  type            = each.value.type
  zone_id         = data.aws_route53_zone.selected.zone_id
}

commands.sh

#!/bin/bash

# This creates an ACM certificate with the prerequistes that the domain is already hosted by AWS Route 53.
# Certificates are created for:
# MyNewDomain.com
# *.MyNewDomain.com

T=terraform

${T} init
${T} fmt
${T} validate

# to deploy:
${T} plan
${T} apply -var "region=us-east-1" -var "profile=ec2-admin" -var "domain_name=MyNewDomain.com"