template.json

{
    "builders": [{
        "type": "amazon-ebs",
        "access_key": "",
        "secret_key": "",
        "region": "us-east-1",
        "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
        },
        "instance_type": "t2.micro",
        "ssh_username": "ubuntu",
        "ami_name": "example-ami-packer",
        "force_deregister": true
    }],
    "_comment": "Running Ansible roles on the image",
    "provisioners": [
      {
        "type": "shell",
        "script": "scripts/ansible.sh"
      },
      {
        "type": "ansible-local",
        "playbook_file": "../ansible/playbook.yml",
        "group_vars": "../ansible/group_vars"
      },
      {
        "type": "shell",
        "script": "scripts/cleanup.sh"
      }
    ],
    "post-processors": [
      [
        {
          "output": "manifest.json",
          "strip_path": true,
          "type": "manifest"
        }
      ]
    ]
}