packer-build.json

{
   "variables": {
      "aws_access_key": "",
      "aws_secret_key": "",
      "name": "example",
      "region": "eu-west-1",
      "vpc_id": "CHANGEME",
      "subnet_id": "CHANGEME"
   },
   "builders": [
      {
         "type": "amazon-ebs",
         "ami_name": "{{user `name`}}",
         "region": "{{user `region`}}",
         "vpc_id": "{{user `vpc_id`}}",
         "force_deregister": "true",
         "associate_public_ip_address": true,
         "subnet_id": "{{user `subnet_id`}}",
         "run_tags": {
            "Name": "{{user `name`}}"
         },
         "source_ami": "ami-06ce3edf0cff21f07",
         "instance_type": "t3.nano",
         "ssh_username": "ec2-user",
         "communicator": "ssh"
      }
   ],
   "provisioners": [
      {
         "type": "shell",
         "inline": "while [ ! -f /var/lib/cloud/instance/boot-finished ]; do echo 'Waiting for cloud-init...'; sleep 1; done"
      },
      {
         "type": "shell",
         "script": "./scripts/bootstrap.sh"
      },
      {
         "type": "ansible",
         "playbook_file": "./ansible/bastion.yml"
      }
   ]
}