packer.json

{
  "variables": {
    "aws_access_key_id": "{{env `AWS_ACCESS_KEY_ID`}}",
    "aws_secret_key": "{{env `AWS_SECRET_KEY`}}",
    "aws_region": "{{env `AWS_REGION`}}",
    "app_name": "{{env `APP_NAME`}}",
    "ssh_public_key_file": "{{env `SSH_PUBLIC_KEY_FILE`}}",
    "ssh_public_key_dest": "/tmp/{{uuid}}.pub"
  },
  "builders": [{
    "type": "amazon-ebs",
    "access_key": "{{user `aws_access_key_id`}}",
    "secret_key": "{{user `aws_secret_key`}}",
    "region": "{{user `aws_region`}}",
    "instance_type": "t2.micro",
    "ssh_username": "ubuntu",
    "ami_name": "{{uuid}}",
    "source_ami_filter": {
      "filters": {
        "virtualization-type": "hvm",
        "name": "ubuntu/images/*ubuntu-xenial-16.04-amd64-server-*",
        "root-device-type": "ebs"
      },
      "owners": ["099720109477"],
      "most_recent": true
    },
    "tags": {
      "Name": "{{user `app_name`}}"
    }
  }],
  "provisioners": [{
    "type": "shell",
    "inline": [
      "sudo apt-get install software-properties-common -y",
      "sudo apt-add-repository ppa:ansible/ansible",
      "sudo apt-get update",
      "sudo apt-get install ansible -y"
    ]
  }, {
    "type": "file",
    "source": "{{user `ssh_public_key_file`}}",
    "destination": "{{user `ssh_public_key_dest`}}"
  }, {
    "type": "ansible-local",
    "playbook_file": "{{template_dir}}/ansible/playbook.yml",
    "extra_arguments": [
      "--extra-vars \"ssh_public_key_file={{user `ssh_public_key_dest`}}\"",
      "--extra-vars \"app_name={{user `app_name`}}\""
    ]
  }]
}