aws_autoscaling.yaml

data "aws_autoscaling_groups" "app" {
  filter {
    name   = "tag:id"
    values = ["app-asg"]
  }
}

module "asg-app" {

  source = "../modules/asg/"

  name                = length(data.aws_autoscaling_groups.app.names) > 0 ? data.aws_autoscaling_groups.app.names[0] : "app-asg"
  use_name_prefix     = false
  desired_capacity    = 2
  min_size            = 2
  max_size            = 4
  health_check_type   = "EC2"
  vpc_zone_identifier = ["pvt-subnet-1-id", "pvt-subnet-2-id"]   ## replace with the VPC private subnet IDs
  target_group_arns   = ["alb_target_group_arn"]               ## replace with ARN of the ALB Target Group

  # Launch template

  launch_template_name        = "app-launch-template"
  launch_template_description = "Launch Template for application"
  image_id                    = "ami-id"                        ## replace with the AMI ID of youe application
  instance_type               = "t3.large"
  ebs_optimized               = true
  enable_monitoring           = false
  security_groups             = [" sg-xxxxxxx "]                ## Add the security group IDs to attach to this ASG instances
  key_name                    = "ssh-key-pair"                  ## Keypair used to launch instances in ASG
  iam_instance_profile_name   = "ec2-role-for-s3-ssm-secret-manager"
  user_data                   = base64encode("#!/bin/bash\necho \"Hello\"")

  block_device_mappings = [
    {
      device_name = "/dev/sda1"
      no_device   = 0
      ebs = {
        delete_on_termination = true
        encrypted             = true
        volume_size           = 30
        volume_type           = "gp3"
      }
    }
  ]
  scaling_policies = {
    dynamic_TTS_policy = {
      policy_type = "TargetTrackingScaling"
      target_tracking_configuration = {
        predefined_metric_specification = {
          predefined_metric_type = "ASGAverageCPUUtilization"
        }
        target_value = 70.0
      }
    }
  }

  tags = {
    Name      = "app-asg"
    terraform = "true"
    id        = "app-asg"
  }
}