aws.json

{
    "variables" : {
        "aws_access_key": "{{env `AWS_ACCESS_KEY`}}",
        "aws_secret_key" : "{{env `AWS_SECRET_KEY`}}"
    },
    "builders": [{
        "type":"amazon-ebs",
        "instance_type": "t2.micro",
        "ssh_username": "ubuntu",
        "access_key": "{{user `aws_access_key`}}",
        "secret_key": "{{user `aws_secret_key`}}",
        "region": "eu-west-2",
        "ami_name": "pishoto-{{timestamp}}", 
        "source_ami_filter": {
          "filters": {
            "virtualization-type": "hvm",
            "name": "ubuntu/images/hvm-ssd/ubuntu-xenial-16.04-amd64-server-*",
            "root-device-type": "ebs"
          },
          "owners": ["099720109477"],
          "most_recent": true
        }
    }],
  "provisioners": [{
    "type": "ansible",
    "playbook_file": "nginx.yml",
    "extra_arguments": ["--extra-vars", "ansible_python_interpreter=/usr/bin/python3"]
  }]
}