route53_acm_module.tf

# * acm.tf 

# Create an AWS certificate for hello.aymen.krypton.berlin
resource "aws_acm_certificate" "cert" {
  domain_name       = aws_route53_record.hello.name
  validation_method = "DNS"

  tags = {
    Environment = "Krypton"
    Terraform   = "true"
  }

  lifecycle {
    create_before_destroy = true
  }
}

# * dns.tf
# Data source dns zone
data "aws_route53_zone" "zone" {
  name         = var.zone_name
}

# The Application public LB created by the K8S deployment in /k8s-deployment
data "aws_elb" "lb" {
  name = var.k8s_app_lb_name
}

# Create hello.aymen.krypton.berlin route53 record
resource "aws_route53_record" "hello" {
  zone_id = data.aws_route53_zone.zone.zone_id
  name    = "hello.${data.aws_route53_zone.zone.name}"
  type    = "CNAME"
  ttl     = "300"
  records = [data.aws_elb.lb.dns_name]
}
# * variables.tf 

variable "k8s_app_lb_name" {
  type        = string
  description = "the K8S app public LB"
}
variable "zone_name" {
  type        = string
  default     = "aymen.krypton.berlin."
  description = "Main zone name"
}