{
  "_comment": "comment",
  "description": "Description Test",
  "min_packer_version": "1.3.0",
  "variables": {
    "one": "1",
    "two": "2",
    "three": null
  },
  "sensitive-variables": ["one"],
  "builders": [
    {
      "type": "amazon-ebs",

      "ami_name": "AMI Name",
      "instance_type": "t2.micro",
      "ssh_username": "ec2-user",
      "source_ami": "ami-aaaaaaaaaaaaaa"
    },
    {
      "type": "docker",

      "image": "ubuntu",
      "export_path": "image.tar"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "script": "script.sh"
    },
    {
      "type": "shell",
      "script": "script.sh",
      "override": {
        "docker": {
          "execute_command": "echo 'override'"
        }
      }
    }
  ],
  "post-processors": [
    [
      "compress",
      {
        "type": "vagrant",
        "only": ["docker"]
      }
    ],
    [
      {
        "type": "shell-local",
        "inline": ["echo foo"],
        "except": ["amazon-ebs"]
      }
    ]
  ],
  "push": {
    "name": "push test"
  }
}