template.json

{
  "description": "Debian Golden Image for Network/Host Defense System",
  "variables": {
    "vm_name": "{{ user `vm_name` }}",
    "ssh_username": "{{ user `ssh_username` }}",
    "ssh_password": "{{ user `ssh_password` }}",
    "iso_url": "{{env `ISO_URL` }}",
    "iso_checksum": "{{ user `iso_checksum` }}"
  },
  "builders": [
    {
      "type": "virtualbox-iso",
      "vm_name": "{{ user `vm_name` }}",
      "guest_os_type": "Debian_64",
      "guest_additions_mode": "disable",
      "virtualbox_version_file": "",
      "iso_url": "{{ user `iso_url` }}",
      "iso_checksum": "{{ user `iso_checksum` }}",
      "headless": false,
      "http_directory": "http",
      "http_port_min": 10082,
      "http_port_max": 10085,
      "boot_wait": "10s",
      "boot_command": [  
        "<esc><wait>",
        "auto ",
        "preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg ",
        "<enter>"
      ],  
      "vboxmanage": [
        ["modifyvm", "{{ .Name }}", "--nat-localhostreachable1", "on"],
        ["modifyvm", "{{ .Name }}", "--memory", 2048],
        ["modifyvm", "{{ .Name }}", "--cpus", 2]
      ],
      "communicator": "ssh",
      "ssh_username": "{{ user `ssh_username` }}",
      "ssh_password": "{{ user `ssh_password` }}",
      "ssh_port": 22,
      "ssh_host_port_min": 2222,
      "ssh_host_port_max": 2225,
      "ssh_wait_timeout": "60m",
      "ssh_pty": true,
      "shutdown_command": "echo {{ user `ssh_password` }} | sudo -S shutdown -P now"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "sudo apt update -y",
        "sudo apt upgrade -y",
        "sudo apt install -y ansible"
      ]
    },
    {
      "type": "ansible-local",
      "playbook_dir": "ansible",
      "playbook_file": "ansible/packer.yml",
      "extra_arguments": [
        "--extra-vars",
        "'user_home=/home/{{ user `ssh_username` }}'"
      ]
    }
  ],
  "post-processors": [
    [
      {
        "type": "vagrant",
        "compression_level": "9",
        "output": "box/{{ user `vm_name`}}.box",
        "only": ["virtualbox-iso"]
      },
      {
        "type": "checksum",
        "checksum_types": ["md5", "sha256", "sha512"],
        "output": "box/checksums/{{.ChecksumType}}.txt"
      }
    ]
  ]
}