packer.json

{
  "builders": [
    {
      "boot_command": [
        "<tab> text ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ks.cfg<enter><wait>"
      ],
      "boot_wait": "10s",
      "disk_size": 40960,
      "guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
      "guest_os_type": "RedHat_64",
      "http_directory": ".",
      "iso_checksum": "495a7d50eb7633c4667fbfc5e817bf244697c627",
      "iso_checksum_type": "sha1",
      "iso_url": "{{user `mirror`}}/7/isos/x86_64/CentOS-7.0-1406-x86_64-Minimal.iso",
      "shutdown_command": "echo 'vagrant'|sudo -S /sbin/halt -h -p",
      "ssh_password": "vagrant",
      "ssh_port": 22,
      "ssh_username": "vagrant",
      "ssh_wait_timeout": "10000s",
      "type": "virtualbox-iso",
      "vboxmanage": [
        [
          "modifyvm",
          "{{.Name}}",
          "--memory",
          "512"
        ],
        [
          "modifyvm",
          "{{.Name}}",
          "--cpus",
          "2"
        ]
      ],
      "virtualbox_version_file": ".vbox_version",
      "vm_name": "packer-centos-docker-io"
    }
  ],
  "post-processors": [
    {
      "output": "centos-docker-io.box",
      "type": "vagrant",
      "compression_level": 9
    }
  ],
  "provisioners": [
    {
      "execute_command": "echo 'vagrant' | {{.Vars}} sudo -S -E bash '{{.Path}}'",
      "scripts": [
        "post.sh",
        "fix-slow-dns.sh",
        "sshd.sh",
        "vagrant.sh",
        "vmtools.sh",
        "docker.sh",
        "cleanup.sh",
        "minimize.sh"
      ],
      "type": "shell"
    }
  ],
  "variables": {
    "mirror": "http://mirrors.kernel.org/centos"
  }
}