Messing around with Packer

ubuntu_64.json

{
    "variables": {
        "version": "{{env `CLOUD_VER`}}",
        "cloud_user": "{{env `CLOUD_USER`}}",
        "cloud_token": "{{env `CLOUD_TOKEN`}}",
        "atlas_token": "{{env `ATLAS_TOKEN`}}",
        "push_name": "entropyworks/ubuntu-stable-atg-amd64",
        "os_codename": "ubuntu-stable",
        "arch": "amd64",
        "release" "14.04"
        "release_minor" ".1"
        "iso_checksum": "ca2531b8cd79ea5b778ede3a524779b9", 
        "hostname": "ubuntu", 
        "ssh_name": "vagrant", 
        "ssh_pass": "vagrant"
    }, 
    "provisioners": [
        {
            "override": {
                "virtualbox-iso": {
                    "execute_command": "echo 'vagrant' | sudo -S sh '{{ .Path }}'"
                }
            }, 
            "type": "shell", 
            "scripts": [
                "scripts/root_setup.sh"
            ]
        }, 
        {
            "type": "shell", 
            "scripts": [
                "scripts/setup.sh"
            ]
        }
    ], 
    "builders": [
        {
            "name": "ubuntu-{{user `release`}}.{{user `arch`}}.virtualbox", 
            "guest_additions_path": "VBoxGuestAdditions.iso", 
            "iso_url": "http://releases.ubuntu.com/{{user `release`}}/ubuntu-{{user `release`}}{{user `release_minior`}}-server-{{user `arch`}}.iso", 
            "ssh_port": "22", 
            "ssh_username": "{{user `ssh_name`}}", 
            "ssh_password": "{{user `ssh_pass`}}", 
            "iso_checksum_type": "md5", 
            "virtualbox_version_file": ".vbox_version", 
            "http_port_max": "9009", 
            "vboxmanage": [
                [
                    "modifyvm", 
                    "{{.Name}}", 
                    "--memory", 
                    "512"
                ], 
                [
                    "modifyvm", 
                    "{{.Name}}", 
                    "--cpus", 
                    "2"
                ]
            ], 
            "boot_command": [
                "<esc><esc><enter><wait>", 
                "/install/vmlinuz noapic ", 
                "preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg ", 
                "debian-installer=en_US auto locale=en_US kbd-chooser/method=us ", 
                "hostname={{user `hostname`}} ", 
                "fb=false debconf/frontend=noninteractive ", 
                "keyboard-configuration/modelcode=SKIP keyboard-configuration/layout=USA ", 
                "keyboard-configuration/variant=USA console-setup/ask_detect=false ", 
                "initrd=/install/initrd.gz -- <enter>"
            ], 
            "guest_os_type": "Ubuntu_64", 
            "iso_checksum": "{{user `iso_checksum`}}", 
            "boot_wait": "10s", 
            "http_port_min": "9001", 
            "http_directory": "ubuntu_64", 
            "shutdown_command": "echo '{{user `ssh_pass`}}' | sudo -S shutdown -P now", 
            "type": "virtualbox-iso"
        }
    ], 
    "push": {
          "name": "{{user `push_name`}}"
     },
    "post-processors": [
      [{
          "type": "vagrant",
          "compression_level": "9",
          "output": "{{user `os_codename`}}-{{user `arch`}}-{{.Provider}}.box",
          "only": [
           "virtualbox-iso"
         ]
      },
      {
          "type": "atlas",
          "artifact": "{{user `cloud_user`}}/{{user `os_codename`}}-{{user `arch`}}",
          "artifact_type": "vagrant",
          "metadata": {
            "created_at": "{{timestamp}}"
            "version": "{{user `version`}}",
            "version_description": "Created with Packer",
          },
          "only": [
           "virtualbox-iso"
         ]
      },
      {
          "type": "vagrant-cloud",
          "box_tag": "{{user `cloud_user`}}/{{user `os_codename`}}-{{user `arch`}}",
          "access_token": "{{user `cloud_token`}}",
          "version_description": "Created with Packer",
          "version": "{{user `version`}}",
          "only": [
           "virtualbox-iso"
         ]
      }]
    ]
}