{
    "builders": [
      {
        "name": "ubuntu-2004",
        "type": "virtualbox-iso",
        "guest_os_type": "Ubuntu_64",
        "headless": false,

        "iso_url": "../iso/mini.iso",
        "iso_checksum": "e5bf713621b43207dead707396da29f6",

        "ssh_username": "vmadmin",
        "ssh_password": "vmadmin",
	"ssh_timeout": "40m",

        "http_directory": "http",
        "memory": 1024,

        "disk_size": 7000,

        "boot_wait": "5s",
        "boot_command": [
         "<tab><wait>",
         "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
         "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
         "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
         "linux initrd=initrd.gz",
         " auto=true",
         " priority=critical",
         " url=http://{{.HTTPIP}}:{{.HTTPPort}}/ubuntu-20.04-preseed.txt",
         " hostname=mincvm",
         " DEBCONF_DEBUG=5",
         "<enter>"
        ],
        "shutdown_command": "echo 'vmadmin'|sudo -S shutdown -P now",
        "guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
        "virtualbox_version_file": ".vbox_version",
        "vm_name": "packer-ubuntu-20.04-amd64",

        "vboxmanage": [
            ["modifyvm", "{{.Name}}", "--cpuexecutioncap", "100"],
            ["modifyvm", "{{.Name}}", "--cpus", "4"],
            ["modifyvm", "{{.Name}}", "--memory", "4096"],
            ["modifyvm", "{{.Name}}", "--usb", "off"],
            ["modifyvm", "{{.Name}}", "--audio", "none"],
            ["modifyvm", "{{.Name}}", "--nictype1", "virtio"],
            ["modifyvm", "{{.Name}}", "--graphicscontroller", "VMSVGA"]
        ]
      }
    ],

    "provisioners": [
        {
         "type": "shell",
         "inline": [
            "echo 'vmadmin'|sudo -S apt-get update",
            "echo 'vmadmin'|sudo -S apt-get upgrade -y"
         ]
        }
    ],

    "post-processors": [{
      "type": "vagrant",
      "compression_level": "8",
      "output": "output/ubuntu-20.04.box"
    }]
}