Ubuntu custom image

.gitignore

@@ -9,3 +9,5 @@ packer_cache
 *.*.swp
 *.gz
 *.xz
+ubuntu/OVMF_VARS.fd
+ubuntu/seeds.iso

ubuntu/Makefile

@@ -0,0 +1,22 @@
+PACKER ?= packer
+
+.PHONY: all clean
+
+all: custom-ubuntu-efi.dd.gz
+
+seeds.iso: user-data meta-data
+	cloud-localds $@ $^
+
+OVMF_VARS.fd: /usr/share/OVMF/OVMF_VARS.fd
+	cp -v $< $@
+
+custom-ubuntu.dd.gz: clean seeds.iso
+	sudo PACKER_LOG=1 ${PACKER} build ubuntu.json && reset
+
+custom-ubuntu-efi.dd.gz: clean seeds.iso OVMF_VARS.fd
+	sudo PACKER_LOG=1 ${PACKER} build ubuntu-efi.json && reset
+
+clean:
+	sudo ${RM} -rf output-qemu ubuntu*.tar.gz
+
+.VOLATILE: OVMF_VARS.fd

ubuntu/README.md

@@ -0,0 +1,62 @@
+# Ubuntu Packer Template for MAAS
+
+## Introduction
+The Packer template in this directory creates a Ubuntu AMD64 image for use with MAAS.
+
+## Prerequisites (to create the image)
+
+* A machine running Ubuntu 18.04+ with the ability to run KVM virtual machines.
+* qemu-utils
+* cloud-image-utils
+* [Packer.](https://www.packer.io/intro/getting-started/install.html)
+
+## Requirements (to deploy the image)
+
+* [MAAS](https://maas.io) 2.3+
+* [Curtin](https://launchpad.net/curtin) 18.1-59+
+
+## Customizing the Image
+
+TODO
+
+## Building the image using a proxy
+The Packer template downloads the Ubuntu
+net installer from the Internet. To tell Packer to use a proxy set the
+HTTP_PROXY environment variable to your proxy server. Alternatively you may
+redefine iso_url to a local file, set iso_checksum_type to none to disable
+checksuming, and remove iso_checksum_url.
+
+## Building an image
+You can easily build the image using the Makefile:
+
+```
+$ make
+```
+
+Alternatively you can manually run packer. Your current working directory must
+be in packer-maas/ubuntu, where this file is located. Once in
+packer-maas/ubuntu you can generate an image with:
+
+```
+$ sudo PACKER_LOG=1 packer build ubuntu.json
+```
+
+Note: ubuntu.json is configured to run Packer in headless mode. Only Packer
+output will be seen. If you wish to see the installation output connect to the
+VNC port given in the Packer output or change the value of headless to false in
+ubuntu.json.
+
+Installation is non-interactive.
+
+## Uploading an image to MAAS
+```
+$ maas admin boot-resources create \
+    name='ubuntu/asouza' \
+    title='Ubuntu Custom' \
+    architecture='amd64/generic' \
+    filetype='ddgz' \
+    content@=custom-ubuntu.dd.gz
+```
+
+## Default Username
+The default username is ```ubuntu```

ubuntu/scripts/cleanup.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+apt-get autoremove --purge -yq
+apt-get clean -yq

ubuntu/scripts/curtin-hooks

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# ENV variables available
+#
+# OUTPUT_NETWORK_CONFIG: 
+#    This is a path to the file created during network discovery stage.
+# OUTPUT_FSTAB: 
+#    This is a path to the file created during partitioning stage.
+# CONFIG: 
+#    This is a path to the curtin config file. 
+# WORKING_DIR: 
+#    This is a path to a temporary directory where curtin stores state and configuration files.
+

ubuntu/scripts/curtin.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+apt-get install -y jq
+mkdir -p /curtin
+
+mv /tmp/curtin-hooks /curtin/curtin-hooks
+chmod 755 /curtin/curtin-hooks

ubuntu/scripts/networking.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+apt-get install -qy netplan.io cloud-init
+

ubuntu/ubuntu-efi.json

@@ -0,0 +1,77 @@
+{
+    "variables": {
+        "name": "ubuntu-20.04",
+        "http_directory": "http",
+        "http_proxy": "{{env `http_proxy`}}",
+        "https_proxy": "{{env `https_proxy`}}",
+        "no_proxy": "{{env `no_proxy`}}",
+        "ssh_username": "ubuntu",
+        "ssh_password": "ubuntu"
+    },
+    "builders": [
+        {
+            "boot_command": [
+                "<wait2>e<wait5>",
+                "<down><down><down><wait5><end><wait5>",
+                "<bs><bs><bs><bs><wait>autoinstall ---<wait><f10>"
+            ],
+            "boot_wait": "2s",
+            "cpus": 2,
+            "disk_size": "4G",
+            "headless": true,
+            "http_directory": "{{user `http_directory`}}",
+            "iso_checksum": "file:http://releases.ubuntu.com/20.04/SHA256SUMS",
+            "iso_url": "https://releases.ubuntu.com/focal/ubuntu-20.04.3-live-server-amd64.iso",
+            "iso_target_path": "packer_cache/ubuntu.iso",
+            "memory": 1024,
+            "type": "qemu",
+            "format": "raw",
+            "qemuargs": [
+                [ "-vga", "qxl"],
+                [ "-device", "virtio-blk-pci,drive=drive0,bootindex=0" ],
+                [ "-device", "virtio-blk-pci,drive=cdrom0,bootindex=1" ],
+                [ "-device", "virtio-blk-pci,drive=drive1,bootindex=2" ],
+                [ "-drive", "if=pflash,format=raw,readonly=on,file=/usr/share/OVMF/OVMF_CODE.fd"],
+                [ "-drive", "if=pflash,format=raw,file=OVMF_VARS.fd"],
+                [ "-drive", "file=output-qemu/packer-qemu,if=none,id=drive0,cache=writeback,discard=ignore,format=raw"],
+                [ "-drive", "file=seeds.iso,format=raw,cache=none,if=none,id=drive1"],
+                [ "-drive", "file=packer_cache/ubuntu.iso,if=none,id=cdrom0,media=cdrom" ]
+            ],
+            "shutdown_command": "sudo -S shutdown -P now",
+            "ssh_username": "{{user `ssh_username`}}",
+            "ssh_password": "{{user `ssh_password`}}",
+            "ssh_handshake_attempts": 500,
+            "ssh_wait_timeout": "45m",
+            "ssh_timeout": "45m"
+        }
+    ],
+    "provisioners": [
+        {
+            "type": "file",
+            "source": "{{template_dir}}/scripts/curtin-hooks",
+            "destination": "/tmp/curtin-hooks"
+        },
+        {
+            "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/curtin.sh",
+                "{{template_dir}}/scripts/networking.sh",
+                "{{template_dir}}/scripts/cleanup.sh"
+            ],
+            "type": "shell"
+        }
+    ],
+    "post-processors": [
+        {
+            "type": "compress",
+            "output": "custom-ubuntu-efi.dd.gz"
+        }
+    ]
+}

ubuntu/ubuntu.json

@@ -0,0 +1,70 @@
+{
+    "variables": {
+        "name": "ubuntu-20.04",
+        "http_directory": "http",
+        "http_proxy": "{{env `http_proxy`}}",
+        "https_proxy": "{{env `https_proxy`}}",
+        "no_proxy": "{{env `no_proxy`}}",
+        "ssh_username": "ubuntu",
+        "ssh_password": "ubuntu"
+    },
+    "builders": [
+        {
+            "boot_command": [
+                "<wait>yes<wait><enter>"
+            ],
+            "boot_wait": "60s",
+            "cpus": 2,
+            "disk_size": "4G",
+            "headless": true,
+            "http_directory": "{{user `http_directory`}}",
+            "iso_checksum": "file:http://releases.ubuntu.com/20.04/SHA256SUMS",
+            "iso_url": "https://releases.ubuntu.com/focal/ubuntu-20.04.3-live-server-amd64.iso",
+            "iso_target_path": "packer_cache/ubuntu.iso",
+            "memory": 1024,
+            "type": "qemu",
+            "format": "raw",
+            "qemuargs": [
+                [ "-vga", "qxl"],
+                [ "-drive", "file=output-qemu/packer-qemu,if=virtio,cache=writeback,discard=ignore,format=raw"],
+                [ "-drive", "file=seeds.iso,format=raw,cache=none,if=virtio"],
+                [ "-cdrom", "packer_cache/ubuntu.iso" ]
+            ],
+            "shutdown_command": "sudo -S shutdown -P now",
+            "ssh_username": "{{user `ssh_username`}}",
+            "ssh_password": "{{user `ssh_password`}}",
+            "ssh_handshake_attempts": 500,
+            "ssh_wait_timeout": "45m",
+            "ssh_timeout": "45m"
+        }
+    ],
+    "provisioners": [
+        {
+            "type": "file",
+            "source": "{{template_dir}}/scripts/curtin-hooks",
+            "destination": "/tmp/curtin-hooks"
+        },
+        {
+            "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/curtin.sh",
+                "{{template_dir}}/scripts/networking.sh",
+                "{{template_dir}}/scripts/cleanup.sh"
+            ],
+            "type": "shell"
+        }
+    ],
+    "post-processors": [
+        {
+            "type": "compress",
+            "output": "custom-ubuntu.dd.gz"
+        }
+    ]
+}

ubuntu/user-data

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+#cloud-config
+autoinstall:
+  version: 1
+  identity:
+    hostname: ubuntu
+    username: ubuntu
+    password: "$6$canonical.$0zWaW71A9ke9ASsaOcFTdQ2tx1gSmLxMPrsH0rF0Yb.2AEKNPV1lrF94n6YuPJmnUy2K2/JSDtxuiBDey6Lpa/"
+  keyboard:
+    layout: en
+    variant: us
+  ssh:
+    install-server: true
+
+  storage:
+    grub:
+      update_nvram: true
+    swap:
+      size: 0
+    layout:
+      name: direct
+
+  late-commands:
+      - echo 'ubuntu ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/ubuntu
+
+  package_update: true
+  package_upgrade: true