Packer Ubuntu 18.04 setup for Virtual Box and AWS AMI

init.sh

set -e

echo "The user is: $SUDO_USER"

# System Updates
apt-get update
DEBIAN_FRONTEND=noninteractive apt-get dist-upgrade -yq

apt-get update
DEBIAN_FRONTEND=noninteractive apt-get upgrade -yq
apt-get install -y curl htop language-pack-en
apt-get autoremove -y

# Configure salt
curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
sh bootstrap-salt.sh
sed -i -e 's/#file_client:.*/file_client: local/g' /etc/salt/minion
ln -sf "/home/$SUDO_USER/salt" "/srv/salt"
ln -sf "/home/$SUDO_USER/pillar" "/srv/pillar"

# Run masterless salt
systemctl restart salt-minion
salt-call --local state.apply

# Clean up salt
rm -rf "/home/$SUDO_USER/salt" /srv/salt "/home/$SUDO_USER/pillar" /srv/pillar 
sed -i -e '/^file_client:/ d' /etc/salt/minion

preseed.cfg

choose-mirror-bin mirror/http/proxy string
d-i base-installer/kernel/override-image string linux-server
d-i clock-setup/utc boolean true
d-i clock-setup/utc-auto boolean true
d-i finish-install/reboot_in_progress note
d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean true
d-i partman-auto/disk string /dev/sda
d-i partman-auto-lvm/guided_size string max
d-i partman-auto/choose_recipe select atomic
d-i partman-auto/method string lvm
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman/confirm_write_new_label boolean true
d-i pkgsel/include string openssh-server cryptsetup build-essential libssl-dev libreadline-dev zlib1g-dev linux-source dkms nfs-common
d-i pkgsel/install-language-support boolean false
d-i pkgsel/update-policy select none
d-i pkgsel/upgrade select full-upgrade
d-i time/zone string UTC
tasksel tasksel/first multiselect standard, ubuntu-server

d-i console-setup/ask_detect boolean false
d-i keyboard-configuration/layoutcode string uk
d-i keyboard-configuration/modelcode string pc105
d-i debian-installer/locale string en_GB

# Create vagrant user account.
d-i passwd/user-fullname string vagrant
d-i passwd/username string vagrant
d-i passwd/user-password password vagrant
d-i passwd/user-password-again password vagrant
d-i user-setup/allow-password-weak boolean true
d-i user-setup/encrypt-home boolean false
d-i passwd/user-default-groups vagrant sudo
d-i passwd/user-uid string 900

ubuntu-1804.json

{
  "builders": [
    {
      "type": "virtualbox-iso",
      "boot_command": [
        "<enter><wait><f6><esc><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>",
        "<bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
        "/install/vmlinuz",
        " auto",
        " console-setup/ask_detect=false",
        " console-setup/layoutcode=uk",
        " console-setup/modelcode=pc105",
        " debconf/frontend=noninteractive",
        " debian-installer=en_GB",
        " fb=false",
        " initrd=/install/initrd.gz",
        " kbd-chooser/method=uk",
        " keyboard-configuration/layout=UK",
        " keyboard-configuration/variant=UK",
        " locale=en_GB",
        " netcfg/get_domain=vm",
        " netcfg/get_hostname=vagrant",
        " grub-installer/bootdev=/dev/sda",
        " noapic",
        " preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg",
        " -- <wait>",
        "<enter><wait>"
      ],
      "boot_wait": "10s",
      "disk_size": 81920,
      "guest_os_type": "Ubuntu_64",
      "headless": false,
      "http_directory": "http",
      "iso_urls": [
        "iso/ubuntu-18.04-server-amd64.iso",
        "http://cdimage.ubuntu.com/ubuntu/releases/bionic/release/ubuntu-18.04.1-server-amd64.iso"
      ],
      "iso_checksum_type": "sha256",
      "iso_checksum": "a5b0ea5918f850124f3d72ef4b85bda82f0fcd02ec721be19c1a6952791c8ee8",
      "ssh_username": "vagrant",
      "ssh_password": "vagrant",
      "ssh_port": 22,
      "ssh_wait_timeout": "10000s",
      "shutdown_command": "echo 'vagrant'|sudo -S shutdown -P now",
      "guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
      "virtualbox_version_file": ".vbox_version",
      "vm_name": "packer-ubuntu-18.04-amd64",
      "vboxmanage": [
        [
          "modifyvm",
          "{{.Name}}",
          "--memory",
          "1024"
        ],
        [
          "modifyvm",
          "{{.Name}}",
          "--cpus",
          "1"
        ]
      ]
    },
    {
      "type": "amazon-ebs",
      "access_key": "{{user `aws_access_key`}}",
      "secret_key": "{{user `aws_secret_key`}}",
      "region": "eu-west-1",
      "instance_type": "t2.nano",
      "ssh_username": "ubuntu",
      "source_ami_filter": {
        "filters": {
          "name": "ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-*"
        },
        "most_recent": true,
        "owners": ["099720109477"]
      },
      "ami_name": "ubuntu-1804 {{timestamp}}",
      "associate_public_ip_address": true,
      "tags": {
        "Name": "Ubuntu 18.04",
        "Project": "Core",
        "Commit": "unknown"
      }
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "../salt/salt",
      "destination": "~/salt"
    },
    {
      "type": "shell",
      "execute_command": "echo 'vagrant' | {{.Vars}} sudo -S -E bash '{{.Path}}'",
      "scripts": [
        "init.sh"
      ]
    }
  ],
  "post-processors": [
    [
      {
        "output": "builds/{{.Provider}}-ubuntu1804.box",
        "type": "vagrant"
      }
    ]
  ]
}