template.json

{
  "variables": {
    "mirror": "http://ftp.tku.edu.tw/Linux/ArchLinux",
    "password": "archlinux"
  },
  "builders": [
    {
      "type": "virtualbox-iso",
      "vboxmanage": [
        [ "modifyvm", "{{.Name}}", "--memory", "1024" ],
        [ "modifyvm", "{{.Name}}", "--cpus",   "1" ]
      ],
      "virtualbox_version_file": ".vbox_version",
      "vm_name": "archlinux-2015-01-01",
      "iso_url": "{{ user `mirror` }}/iso/2015.01.01/archlinux-2015.01.01-dual.iso",
      "iso_checksum": "a8344dde2e9a22e6a66d10ee016818c1491a9054",
      "iso_checksum_type": "sha1",
      "guest_os_type": "ArchLinux_64",
      "guest_additions_mode": "disable",
      "http_directory": ".",
      "boot_wait": "5s",
      "boot_command": [
        "<enter><wait10><wait10>",
        "echo 'root:{{ user `password` }}' | chpasswd<enter>",
        "ssh-keygen -A<enter><wait>",
        "systemctl reenable sshd.service<enter>",
        "systemctl start sshd.service<enter>"
      ],
      "disk_size": 20480,
      "hard_drive_interface": "sata",
      "ssh_port": 22,
      "ssh_username": "root",
      "ssh_password": "{{ user `password` }}",
      "shutdown_command": "systemctl poweroff"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "environment_vars": [
        "MIRROR={{ user `mirror` }}",
        "PW={{ user `password` }}"
      ],
      "execute_command": "{{.Vars}} sh -x {{.Path}}",
      "scripts": [
        "scripts/10-disk.sh",
        "scripts/20-base.sh",
        "scripts/25-packages.sh",
        "scripts/30-bootstrap.sh",
        "scripts/90-cleanup.sh"
      ]
    }
  ],
  "post-processors": [
    {
      "type": "vagrant",
      "compression_level": "9",
      "output": "archlinux.box"
    }
  ]
}