first commit

common/minimize.sh

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+#!/bin/sh -eux
+
+case "$PACKER_BUILDER_TYPE" in
+  qemu) exit 0 ;;
+esac
+
+# Whiteout root
+count=$(df --sync -kP / | tail -n1  | awk -F ' ' '{print $4}')
+count=$(($count-1))
+dd if=/dev/zero of=/tmp/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed";
+rm /tmp/whitespace
+
+# Whiteout /boot
+count=$(df --sync -kP /boot | tail -n1 | awk -F ' ' '{print $4}')
+count=$(($count-1))
+dd if=/dev/zero of=/boot/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed";
+rm /boot/whitespace
+
+set +e
+swapuuid="`/sbin/blkid -o value -l -s UUID -t TYPE=swap`";
+case "$?" in
+    2|0) ;;
+    *) exit 1 ;;
+esac
+set -e
+
+if [ "x${swapuuid}" != "x" ]; then
+    # Whiteout the swap partition to reduce box size
+    # Swap is disabled till reboot
+    swappart="`readlink -f /dev/disk/by-uuid/$swapuuid`";
+    /sbin/swapoff "$swappart" || true;
+    dd if=/dev/zero of="$swappart" bs=1M || echo "dd exit code $? is suppressed";
+    /sbin/mkswap -U "$swapuuid" "$swappart";
+fi
+
+sync;

ubuntu/http/preseed.cfg

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+choose-mirror-bin mirror/http/proxy string
+d-i pkgsel/install-language-support boolean false
+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 mirror/country string manual
+d-i mirror/http/directory string /ubuntu/
+d-i mirror/http/hostname string archive.ubuntu.com
+d-i mirror/http/proxy string
+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_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 passwd/user-fullname string vagrant
+d-i passwd/user-uid string 1000
+d-i passwd/user-password password vagrant
+d-i passwd/user-password-again password vagrant
+d-i passwd/username string vagrant
+d-i pkgsel/include string openssh-server cryptsetup libssl-dev libreadline-dev zlib1g-dev linux-source dkms nfs-common linux-headers-$(uname -r) perl cifs-utils software-properties-common rsync ifupdown
+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
+d-i user-setup/allow-password-weak boolean true
+d-i user-setup/encrypt-home boolean false
+tasksel tasksel/first multiselect standard, server

ubuntu/http/user-data

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+#cloud-config
+autoinstall:
+  version: 1
+  identity:
+    hostname: ubuntu-server
+    password: '$6$wdAcoXrU039hKYPd$508Qvbe7ObUnxoj15DRCkzC3qO7edjH0VV7BPNRDYK4QR8ofJaEEF2heacn0QgD.f8pO8SNp83XNdWG6tocBM1'
+    username: ubuntu
+  early-commands:
+    # otherwise packer tries to connect and exceed max attempts:
+    - systemctl stop ssh
+  ssh:
+    install-server: true
+    allow-pw: yes

ubuntu/scripts/cleanup.sh

@@ -0,0 +1,98 @@
+#!/bin/sh -eux
+
+echo "remove linux-headers"
+dpkg --list \
+  | awk '{ print $2 }' \
+  | grep 'linux-headers' \
+  | xargs apt-get -y purge;
+
+echo "remove specific Linux kernels, such as linux-image-3.11.0-15-generic but keeps the current kernel and does not touch the virtual packages"
+dpkg --list \
+    | awk '{ print $2 }' \
+    | grep 'linux-image-.*-generic' \
+    | grep -v `uname -r` \
+    | xargs apt-get -y purge;
+
+echo "remove old kernel modules packages"
+dpkg --list \
+    | awk '{ print $2 }' \
+    | grep 'linux-modules-.*-generic' \
+    | grep -v `uname -r` \
+    | xargs apt-get -y purge;
+
+echo "remove linux-source package"
+dpkg --list \
+    | awk '{ print $2 }' \
+    | grep linux-source \
+    | xargs apt-get -y purge;
+
+echo "remove all development packages"
+dpkg --list \
+    | awk '{ print $2 }' \
+    | grep -- '-dev\(:[a-z0-9]\+\)\?$' \
+    | xargs apt-get -y purge;
+
+echo "remove docs packages"
+dpkg --list \
+    | awk '{ print $2 }' \
+    | grep -- '-doc$' \
+    | xargs apt-get -y purge;
+
+echo "remove X11 libraries"
+apt-get -y purge libx11-data xauth libxmuu1 libxcb1 libx11-6 libxext6;
+
+echo "remove obsolete networking packages"
+apt-get -y purge ppp pppconfig pppoeconf;
+
+echo "remove packages we don't need"
+apt-get -y purge popularity-contest command-not-found friendly-recovery bash-completion fonts-ubuntu-font-family-console laptop-detect motd-news-config usbutils grub-legacy-ec2
+
+# 21.04+ don't have this
+echo "remove the installation-report"
+apt-get -y purge popularity-contest installation-report || true;
+
+echo "remove the console font"
+apt-get -y purge fonts-ubuntu-console || true;
+
+echo "removing command-not-found-data"
+# 19.10+ don't have this package so fail gracefully
+apt-get -y purge command-not-found-data || true;
+
+# Exclude the files we don't need w/o uninstalling linux-firmware
+echo "Setup dpkg excludes for linux-firmware"
+cat <<_EOF_ | cat >> /etc/dpkg/dpkg.cfg.d/excludes
+#BENTO-BEGIN
+path-exclude=/lib/firmware/*
+path-exclude=/usr/share/doc/linux-firmware/*
+#BENTO-END
+_EOF_
+
+echo "delete the massive firmware files"
+rm -rf /lib/firmware/*
+rm -rf /usr/share/doc/linux-firmware/*
+
+echo "autoremoving packages and cleaning apt data"
+apt-get -y autoremove;
+apt-get -y clean;
+
+echo "remove /usr/share/doc/"
+rm -rf /usr/share/doc/*
+
+echo "remove /var/cache"
+find /var/cache -type f -exec rm -rf {} \;
+
+echo "truncate any logs that have built up during the install"
+find /var/log -type f -exec truncate --size=0 {} \;
+
+echo "blank netplan machine-id (DUID) so machines get unique ID generated on boot"
+truncate -s 0 /etc/machine-id
+
+echo "remove the contents of /tmp and /var/tmp"
+rm -rf /tmp/* /var/tmp/*
+
+echo "force a new random seed to be generated"
+rm -f /var/lib/systemd/random-seed
+
+echo "clear the history so our install isn't there"
+rm -f /root/.wget-hsts
+export HISTSIZE=0

ubuntu/scripts/hyperv.sh

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+#!/bin/sh -eux
+ubuntu_version="`lsb_release -r | awk '{print $2}'`";
+major_version="`echo $ubuntu_version | awk -F. '{print $1}'`";
+
+case "$PACKER_BUILDER_TYPE" in
+hyperv-iso)
+  echo "installing packaging for hyper-v"
+  if [ "$major_version" -eq "16" ]; then
+    apt-get install -y linux-tools-virtual-lts-xenial linux-cloud-tools-virtual-lts-xenial;
+  else
+    apt-get -y install linux-image-virtual linux-tools-virtual linux-cloud-tools-virtual;
+  fi
+esac

ubuntu/scripts/networking.sh

@@ -0,0 +1,23 @@
+#!/bin/sh -eux
+
+ubuntu_version="`lsb_release -r | awk '{print $2}'`";
+major_version="`echo $ubuntu_version | awk -F. '{print $1}'`";
+
+if [ "$major_version" -ge "18" ]; then
+echo "Create netplan config for eth0"
+cat <<EOF >/etc/netplan/01-netcfg.yaml;
+network:
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: true
+EOF
+else
+  # Adding a 2 sec delay to the interface up, to make the dhclient happy
+  echo "pre-up sleep 2" >> /etc/network/interfaces;
+fi
+
+# Disable Predictable Network Interface names and use eth0
+[ -e /etc/network/interfaces ] && sed -i 's/en[[:alnum:]]*/eth0/g' /etc/network/interfaces;
+sed -i 's/GRUB_CMDLINE_LINUX="\(.*\)"/GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0 \1"/g' /etc/default/grub;
+update-grub;

ubuntu/scripts/update.sh

@@ -0,0 +1,35 @@
+#!/bin/sh -eux
+export DEBIAN_FRONTEND=noninteractive
+
+echo "disable release-upgrades"
+sed -i.bak 's/^Prompt=.*$/Prompt=never/' /etc/update-manager/release-upgrades;
+
+echo "disable systemd apt timers/services"
+systemctl stop apt-daily.timer;
+systemctl stop apt-daily-upgrade.timer;
+systemctl disable apt-daily.timer;
+systemctl disable apt-daily-upgrade.timer;
+systemctl mask apt-daily.service;
+systemctl mask apt-daily-upgrade.service;
+systemctl daemon-reload;
+
+# Disable periodic activities of apt to be safe
+cat <<EOF >/etc/apt/apt.conf.d/10periodic;
+APT::Periodic::Enable "0";
+APT::Periodic::Update-Package-Lists "0";
+APT::Periodic::Download-Upgradeable-Packages "0";
+APT::Periodic::AutocleanInterval "0";
+APT::Periodic::Unattended-Upgrade "0";
+EOF
+
+echo "remove the unattended-upgrades and ubuntu-release-upgrader-core packages"
+rm -rf /var/log/unattended-upgrades;
+apt-get -y purge unattended-upgrades ubuntu-release-upgrader-core;
+
+echo "update the package list"
+apt-get -y update;
+
+echo "upgrade all installed packages incl. kernel and kernel headers"
+apt-get -y dist-upgrade -o Dpkg::Options::="--force-confnew";
+
+reboot

ubuntu/scripts/vmware.sh

@@ -0,0 +1,11 @@
+#!/bin/sh -eux
+
+case "$PACKER_BUILDER_TYPE" in
+vmware-iso|vmware-vmx)
+    echo "install open-vm-tools"
+    apt-get install -y open-vm-tools;
+    mkdir /mnt/hgfs;
+    systemctl enable open-vm-tools
+    systemctl start open-vm-tools
+    echo "platform specific vmware.sh executed";
+esac

ubuntu/ubuntu-20.04-amd64.json

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+{
+    "builders": [
+        {
+            "boot_command": [
+                " <wait>",
+                " <wait>",
+                " <wait>",
+                " <wait>",
+                " <wait>",
+                "<esc><wait>",
+                "<f6><wait>",
+                "<esc><wait>",
+                "<bs><bs><bs><bs><wait>",
+                " autoinstall<wait5>",
+                " ds=nocloud-net<wait5>",
+                ";s=http://<wait5>{{.HTTPIP}}<wait5>:{{.HTTPPort}}/<wait5>",
+                " --- <wait5>",
+                "<enter><wait5>"
+            ],
+            "boot_wait": "1s",
+            "cpus": "{{ user `cpus` }}",
+            "disk_size": "{{user `disk_size`}}",
+            "headless": "{{ user `headless` }}",
+            "http_directory": "{{user `http_directory`}}",
+            "iso_checksum": "{{user `iso_checksum`}}",
+            "iso_url": "{{user `mirror`}}/{{user `mirror_directory`}}/{{user `iso_name`}}",
+            "memory": "{{ user `memory` }}",
+            "output_directory": "{{ user `build_directory` }}/packer-{{user `template`}}-qemu",
+            "shutdown_command": "echo 'ubuntu' | sudo -S shutdown -P now",
+            "ssh_password": "ubuntu",
+            "ssh_port": 22,
+            "ssh_timeout": "10000s",
+            "ssh_username": "ubuntu",
+            "type": "qemu",
+            "vm_name": "{{ user `template` }}",
+			"vnc_bind_address": "0.0.0.0",
+            "qemuargs": [
+              [ "-m", "{{ user `memory` }}" ],
+              [ "-display", "{{ user `qemu_display` }}" ]
+            ]
+        }
+    ],
+    "provisioners": [
+        {
+            "environment_vars": [
+                "HOME_DIR=/home/ubuntu",
+                "http_proxy={{user `http_proxy`}}",
+                "https_proxy={{user `https_proxy`}}",
+                "no_proxy={{user `no_proxy`}}"
+            ],
+            "execute_command": "echo 'ubuntu' | {{.Vars}} sudo -S -E sh -eux '{{.Path}}'",
+            "expect_disconnect": true,
+            "scripts": [
+                "{{template_dir}}/scripts/update.sh",
+                "{{template_dir}}/scripts/networking.sh",
+                "{{template_dir}}/scripts/cleanup.sh",
+                "{{template_dir}}/../common/minimize.sh"
+            ],
+            "type": "shell"
+        }
+    ],
+    "variables": {
+        "box_basename": "ubuntu-20.04",
+        "build_directory": "../builds",
+        "build_timestamp": "{{isotime \"20060102150405\"}}",
+        "cpus": "2",
+        "disk_size": "65536",
+        "guest_additions_url": "",
+        "headless": "",
+        "http_directory": "{{template_dir}}/http",
+        "http_proxy": "{{env `http_proxy`}}",
+        "https_proxy": "{{env `https_proxy`}}",
+        "iso_checksum": "28ccdb56450e643bad03bb7bcf7507ce3d8d90e8bf09e38f6bd9ac298a98eaad",
+        "iso_name": "ubuntu-20.04.4-live-server-amd64.iso",
+        "memory": "1024",
+        "mirror": "http://releases.ubuntu.com",
+        "mirror_directory": "focal",
+        "name": "ubuntu-20.04-amd64",
+        "no_proxy": "{{env `no_proxy`}}",
+        "preseed_path": "preseed.cfg",
+        "qemu_display": "none",
+        "template": "ubuntu-20.04-amd64",
+        "version": "TIMESTAMP"
+    }
+}