Packer configuration

virtualbox.json

{
    "builders": [
        {
            "type": "virtualbox",
            "iso_url": "http://releases.ubuntu.com/12.04/ubuntu-12.04.3-server-amd64.iso",
            "iso_checksum": "61d5e67c70d97b33c13537461a0b153b41304ef412bb0e9d813bb157068c3c65",
            "iso_checksum_type": "sha256",
            "ssh_username": "vagrant",
            "ssh_password": "vagrant",
            "ssh_wait_timeout": "300s",
            "shutdown_command": "echo 'shutdown -P now' > shutdown.sh; echo 'vagrant' | sudo -S sh 'shutdown.sh'",
            "output_directory": "./packerboxes",
            "boot_command": [
                "<esc><esc><enter><wait>",
                "/install/vmlinuz noapic ",
                "preseed/url=http://172.16.30.129/preseed.cfg ",
                "debian-installer=en_US auto locale=en_US kbd-chooser/method=us ",
                "hostname=vagrant ",
                "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>"
            ]
        }
    ],
	
    "provisioners": [
        {
            "type": "shell",
            "binary": true,
            "script": "packerstrap.sh",
            "execute_command": "echo 'vagrant' | sudo -E -S sh '{{ .Path }}'"
        }
    ],
	
    "post-processors": [
        {
            "type": "vagrant",
            "only": ["virtualbox"]
        }
    ]
}