packer json file

{
  "variables": {
    "platform": "dummy_platform",
    "os_name":  "dummy_os_name",
    "built_on": "dummy_built_on",
    "out_dir":  "dummy_out_dir",
    "vagrant_cloud_token": "{{ env `VCLOUD_TOKEN`}}",

    "aws_access_key": "{{ env `AWS_ACCESS_KEY_ID` }}",
    "aws_secret_key": "{{ env `AWS_SECRET_ACCESS_KEY` }}",
    "aws_region": "us-east-1",
    "aws_source_ami": "ami-96a818fe",
    "aws_instance_type": "m3.medium",
    "aws_ssh_timeout": "2m",
    "aws_ssh_username": "centos",

    "vb_ovf_file": ".",
    "vb_ssh_username": "vagrant",
    "vb_ssh_password": "vagrant",
    "vb_ssh_wait_timeout": "30s",
    "vb_shutdown_command": "echo 'vagrant' | sudo -S shutdown -P now",
    "vb_guest_additions_mode": "upload",
    "vb_headless": "true",
    "vb_memory": "1024",
    "vb_cpus": "2",

    "aws_account_blake": "925719937106",
    "aws_account_tennis": "067629317824"
  },
  "builders": [
   {
      "type": "amazon-ebs",
      "access_key": "{{user `aws_access_key`}}",
      "secret_key": "{{user `aws_secret_key`}}",
      "region": "{{user `aws_region`}}",
      "source_ami": "{{user `aws_source_ami`}}",
      "instance_type": "{{user `aws_instance_type`}}",
      "ssh_timeout": "{{user `aws_ssh_timeout`}}",
      "ssh_username": "{{user `aws_ssh_username`}}",
      "temporary_key_pair_name": "ngd-packer-{{user `built_on` }}",
      "ami_name": "ngd-{{user `os_name` }}-{{user `built_on` }}",
      "launch_block_device_mappings": [
         {
           "device_name": "/dev/sda1",
           "delete_on_termination": true
         }
       ],
      "ami_users": [
        "{{ user `aws_account_blake`}}",
        "{{ user `aws_account_tennis`}}"
      ],
      "ami_regions": [ "us-west-2" ]
    },
    {
      "type": "virtualbox-ovf",
      "source_path": "{{user `vb_ovf_file`}}",
      "ssh_username": "{{user `vb_ssh_username`}}",
      "ssh_password": "{{user `vb_ssh_password`}}",
      "ssh_wait_timeout": "{{user `vb_ssh_wait_timeout`}}",
      "shutdown_command": "{{user `vb_shutdown_command`}}",
      "headless": "{{user `vb_headless`}}",
      "guest_additions_mode": "{{user `vb_guest_additions_mode`}}",
      "guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
      "virtualbox_version_file": ".vbox_version",
      "vboxmanage": [
        [ "modifyvm", "{{.Name}}", "--memory", "{{user `vb_memory`}}" ],
        [ "modifyvm", "{{.Name}}", "--cpus",  "{{user `vb_cpus`}}" ]
      ]
    }
  ],
  "provisioners": [
   {
      "type": "file",
      "source": "rsync",
      "destination": "/tmp/rsync"
    },
    {
      "type": "file",
      "source": "cloud-init",
      "destination": "/tmp/cloud-init"
    },
    {
      "type": "shell",
      "execute_command": "echo 'vagrant'|{{.Vars}} sudo -S -E bash '{{.Path}}'",
      "environment_vars": [
        "ID={{user `platform`}}",
        "DEBIAN_FRONTEND=noninteractive",
        "PACKER_BUILD_DATE_TIME={{ user `built_on`}}"
      ],
      "scripts": [
        "scripts/update.sh",
        "scripts/audit.sh",
        "scripts/userhack.sh",
        "scripts/shellhack.sh",
        "scripts/motd.sh",
        "scripts/cloudhack.sh",
        "scripts/rsync.sh",
        "scripts/cleanup.sh"
      ]
    },
    {
      "type": "shell",
      "execute_command": "echo 'vagrant'|{{.Vars}} sudo -S -E bash '{{.Path}}'",
      "scripts": [
        "scripts/virtualbox.sh",
        "scripts/vagranthack.sh"
      ],
      "only": ["virtualbox-ovf"]
    }
  ],
  "post-processors": [
    {
      "type": "vagrant",
      "vagrantfile_template": "vagrantfiles/template.rb",
      "override": {
        "virtualbox": {
          "output":
          "{{user `out_dir`}}/vb/{{user `os_name`}}.box"
        },
        "aws": {
            "output":
            "{{user `out_dir`}}/aws/{{user `os_name`}}.box"
        }
      }
    },
    {
      "type": "atlas",
      "artifact": "nextgxdx/tns-centos-70",
      "artifact_type": "virtualbox",
      "metadata": {
        "created_at": "{{user `built_on`}}"
      }
    }
   ]
}