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 {
  "builders": [{
    "type": "amazon-ebs",
    "region": "us-west-2",
    "source_ami": "ami-01ed306a12b7d1c96",
    "instance_type": "t2.micro",
    "ssh_username": "centos",
    "ami_name": "centos-packer-example-1.0"
  }]
  }

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{
  "post-processors": [
    [
      "compress",
      { "type": "upload", "endpoint": "http://example.com" }
    ]
  ]
}

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    "provisioners": [
        {
            "type": "shell",
            "script": "./example.sh"
        }
    ]

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  "builders": [{
    "type": "amazon-ebs",
    "access_key": "{{user `aws_access_key`}}",
    "secret_key": "{{user `aws_secret_key`}}",
    "region": "us-east-1",
    "instance_type": "t2.micro",
    "ssh_username": "ubuntu",
    "ami_name": "packer-example {{timestamp}}"
  }]

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data "aws_availability_zones" "all" {}
resource "aws_autoscaling_group" "test-asg" {
  launch_configuration    = "${aws_launch_configuration.asg-config.id}"
  availability_zones      = ["${data.aws_availability_zones.all.names}"]
  target_group_arns       = ["${var.target_group_arn}"]
  health_check_type       = "ELB"
  min_size                = "1"
  max_size                = "2"
  tag {
    key = "Name"

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resource "aws_launch_configuration" "asg-config" {
  image_id = "${var.image_id}"
  instance_type = "${var.instance_type}"
  security_groups = ["${aws_security_group.asg-sg.id}"]
  lifecycle {
    create_before_destroy = true
  }
}

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# Modifying an EBS Volume
$ aws ec2 modify-volume --volume-type io1 --iops 100 --size 10  --volume-id vol-Xyz123456
{
    "VolumeModification": {
        "TargetSize": 10, 
        "TargetVolumeType": "io1", 
        "ModificationState": "modifying", 
        "VolumeId": "vol-Xyz123456", 
        "TargetIops": 100, 
        "StartTime": "2019-03-02T17:29:53.000Z", 

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provider "aws" {
  region = "us-west-2"
}

resource "aws_lb" "my-test-lb" {
  name               = "my-test-lb"
  internal           = false
  load_balancer_type = "application"
  ip_address_type    = "ipv4"
  subnets            = ["${var.subnet_id1}", "${var.subnet_id2}"]

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resource "aws_security_group" "alb-sg" {
  name   = "my-alb-sg"
  vpc_id = "${var.vpc_id}"
}

resource "aws_security_group_rule" "http_allow" {
  from_port         = 80
  protocol          = "tcp"
  security_group_id = "${aws_security_group.alb-sg.id}"
  to_port           = 80

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resource "aws_lb_target_group_attachment" "my-tg-attachment1" {
  target_group_arn = "${aws_lb_target_group.my-alb-tg.arn}"
  target_id        = "${var.instance_id1}"
  port             = 80
}

resource "aws_lb_target_group_attachment" "my-tg-attachment2" {
  target_group_arn = "${aws_lb_target_group.my-alb-tg.arn}"
  target_id        = "${var.instance_id2}"
  port             = 80