Work in progress for making iso images for the core-desktop installer.

debian/changelog

@@ -1,4 +1,4 @@
-livecd-rootfs (23.10.56~core1) mantic; urgency=medium
+livecd-rootfs (1:24.04.20~core1) noble; urgency=medium
 
   * Experiment with ubuntu-core-desktop livefs builds.
   * This branch auto-checks-out the related git branch.

live-build/auto/build

@@ -155,6 +155,22 @@ if [ "${IMAGEFORMAT:-}" = "ubuntu-image" ]; then
 	exit 0
 fi
 
+if [ "$PROJECT" = "ubuntu-core-desktop" ]; then
+	# Special case for ubuntu-core-desktop - we need to call
+	# ubuntu-image twice, once for the core image payload and
+	# then for the actual image.
+	echo "Building the core image payload"
+	cd config/
+	/snap/bin/ubuntu-image snap $UBUNTU_IMAGE_PAYLOAD_ARGS \
+		-O output ubuntu-core-desktop*.model-assertion
+	mv output/*.img pc.img
+	xz -0 -T4 pc.img
+	rm -rf output/
+	# We need to rename the image file so that it can be pulled
+	# by the builder.
+	mv pc.img.xz "$PREFIX".img.xz
+fi
+
 # Setup cleanup function
 Setup_cleanup
 

live-build/auto/config

@@ -810,6 +810,31 @@ case $PROJECT in
 		esac
 		;;
 
+	ubuntu-core-desktop)
+		touch config/universe-enabled
+		KERNEL_FLAVOURS='generic-hwe-22.04'
+		PASSES_TO_LAYERS="true"
+		# the live layer, contains all packages for the live session installer
+		add_task live minimal
+		add_snap live ubuntu-core-desktop-installer/classic core22 snapd
+		add_package live linux-$KERNEL_FLAVOURS plymouth-theme-spinner squashfs-tools snapd cloud-init
+
+		# now let's create the neccessary catalog files
+		cat <<-EOF > config/install-sources-in.yaml
+		- default: true
+		  description:
+		    en: Ubuntu Core Desktop.
+		  id: ubuntu-core-desktop
+		  locale_support: none
+		  name:
+		    en: Ubuntu Core Desktop
+		  path: pc.img.xz
+		  type: dd-xz:file
+		  size: @SIZE@
+		  variant: core 
+		EOF
+		;;
+
 	ubuntu-oem)
 		touch config/universe-enabled
 		PASSES_TO_LAYERS="true"
@@ -1435,7 +1460,7 @@ EOF
 		;;
 
 	ubuntu-cpc:*|ubuntu-server:live|ubuntu:desktop-preinstalled| \
-		ubuntu-wsl:*|ubuntu-mini-iso:*|ubuntu:|ubuntu-oem:*)
+		ubuntu-wsl:*|ubuntu-mini-iso:*|ubuntu:|ubuntu-oem:*|ubuntu-core-desktop:*)
 		# Ensure that most things e.g. includes.chroot are copied as is
 		for entry in /usr/share/livecd-rootfs/live-build/${PROJECT}/*; do
 			case $entry in

live-build/ubuntu-core-desktop/hooks/020-ubuntu-live.chroot_early

@@ -0,0 +1,19 @@
+#! /bin/sh
+
+set -eu
+
+case ${PASS:-} in
+    live)
+        ;;
+    *)
+        exit 0
+        ;;
+esac
+
+cat <<EOF > /etc/initramfs-tools/conf.d/casperize.conf
+export CASPER_GENERATE_UUID=1
+EOF
+
+cat <<EOF > /etc/initramfs-tools/conf.d/default-layer.conf
+LAYERFS_PATH=${PASS}.squashfs
+EOF

live-build/ubuntu-core-desktop/includes.chroot.live/etc/cloud/cloud.cfg

@@ -0,0 +1,117 @@
+# The top level settings are used as module
+# and system configuration.
+
+# A set of users which may be applied and/or used by various modules
+# when a 'default' entry is found it will reference the 'default_user'
+# from the distro configuration specified below
+users:
+   - default
+
+# If this is set, 'root' will not be able to ssh in and they
+# will get a message to login instead as the default $user
+disable_root: true
+
+# This will cause the set+update hostname module to not operate (if true)
+preserve_hostname: true
+
+ssh_pwauth: yes
+chpasswd:
+    expire: false
+
+# This is the initial network config.
+# It can be overwritten by cloud-init or subiquity.
+network:
+    version: 2
+    ethernets:
+        zz-all-en:
+            match:
+                name: "en*"
+            dhcp4: true
+        zz-all-eth:
+            match:
+                name: "eth*"
+            dhcp4: true
+
+# We used to have a custom final_message here.  Just use the default instead.
+
+# Example datasource config
+# datasource:
+#    Ec2:
+#      metadata_urls: [ 'blah.com' ]
+#      timeout: 5 # (defaults to 50 seconds)
+#      max_wait: 10 # (defaults to 120 seconds)
+
+# The modules that run in the 'init' stage
+cloud_init_modules:
+ - bootcmd
+ - write-files
+ - ca-certs
+ - rsyslog
+ - users-groups
+ - ssh
+
+# The modules that run in the 'config' stage
+cloud_config_modules:
+# Emit the cloud config ready event
+# this can be used by upstart jobs for 'start on cloud-config'.
+ - ssh-import-id
+ - set-passwords
+ - timezone
+ - disable-ec2-metadata
+ - runcmd
+
+# The modules that run in the 'final' stage
+cloud_final_modules:
+ - scripts-per-once
+ - scripts-user
+ - ssh-authkey-fingerprints
+ - keys-to-console
+ - phone-home
+ - final-message
+
+# System and/or distro specific settings
+# (not accessible to handlers/transforms)
+system_info:
+   # This will affect which distro class gets used
+   distro: ubuntu
+   # Default user name + that default users groups (if added/used)
+   default_user:
+     name: installer
+     lock_passwd: false
+     gecos: Ubuntu
+     groups: [adm, audio, cdrom, dialout, dip, floppy, lxd, netdev, plugdev, sudo, video]
+     sudo: ["ALL=(ALL) NOPASSWD:ALL"]
+     shell: /usr/bin/subiquity-shell
+   # Automatically discover the best ntp_client
+   ntp_client: auto
+   # Other config here will be given to the distro class and/or path classes
+   paths:
+      cloud_dir: /var/lib/cloud/
+      templates_dir: /etc/cloud/templates/
+      upstart_dir: /etc/init/
+   package_mirrors:
+     - arches: [i386, amd64]
+       failsafe:
+         primary: http://archive.ubuntu.com/ubuntu
+         security: http://security.ubuntu.com/ubuntu
+       search:
+         primary:
+           - http://%(ec2_region)s.ec2.archive.ubuntu.com/ubuntu/
+           - http://%(availability_zone)s.clouds.archive.ubuntu.com/ubuntu/
+           - http://%(region)s.clouds.archive.ubuntu.com/ubuntu/
+         security: []
+     - arches: [arm64, armel, armhf]
+       failsafe:
+         primary: http://ports.ubuntu.com/ubuntu-ports
+         security: http://ports.ubuntu.com/ubuntu-ports
+       search:
+         primary:
+           - http://%(ec2_region)s.ec2.ports.ubuntu.com/ubuntu-ports/
+           - http://%(availability_zone)s.clouds.ports.ubuntu.com/ubuntu-ports/
+           - http://%(region)s.clouds.ports.ubuntu.com/ubuntu-ports/
+         security: []
+     - arches: [default]
+       failsafe:
+         primary: http://ports.ubuntu.com/ubuntu-ports
+         security: http://ports.ubuntu.com/ubuntu-ports
+   ssh_svcname: ssh

live-build/ubuntu-core-desktop/includes.chroot.live/etc/cloud/cloud.cfg.d/06_quiet.cfg

@@ -0,0 +1,4 @@
+output: {all: '>> /var/log/cloud-init-output.log'}
+no_ssh_fingerprints: true
+ssh:
+  emit_keys_to_console: false

live-build/ubuntu-core-desktop/includes.chroot.live/etc/systemd/journald.conf.d/no-rate-limit.conf

@@ -0,0 +1,2 @@
+[Journal]
+RateLimitIntervalSec=0

live-build/ubuntu-core-desktop/includes.chroot.live/etc/systemd/system/dev-disk-by\x2duuid-00c629d6\x2d06ab\x2d4dfd\x2db21e\x2dc3186f34105d.device.d/override.conf

@@ -0,0 +1,3 @@
+[Unit]
+JobRunningTimeoutSec=0s
+Wants=subiquity_config.mount

live-build/ubuntu-core-desktop/includes.chroot.live/etc/systemd/system/systemd-journald.service.d/no-compact.conf

@@ -0,0 +1,4 @@
+# systemd in 23.04+ uses a newer "compact" format by default which is not
+# understood by the systemd libraries from jammy used in the subiquity snap.
+[Service]
+Environment="SYSTEMD_JOURNAL_COMPACT=0"

live-build/ubuntu-core-desktop/includes.chroot.live/etc/systemd/system/systemd-journald.service.d/no-hardening.conf

@@ -0,0 +1,4 @@
+# systemd in 22.04+ uses "hash table hardening" by default which is not
+# understood by the systemd libraries from focal used in the subiquity snap.
+[Service]
+Environment="SYSTEMD_JOURNAL_KEYED_HASH=0"

live-build/ubuntu-core-desktop/includes.chroot.live/usr/bin/subiquity-shell

@@ -0,0 +1,3 @@
+#!/bin/sh
+exec sudo snap run subiquity
+

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/getty@.service.d/autologin.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --noclear -n --autologin ubuntu-server %I $TERM

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/getty@tty1.service

@@ -0,0 +1 @@
+/dev/null

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/local-fs.target.wants/media-filesystem.mount

@@ -0,0 +1 @@
+../media-filesystem.mount

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/serial-getty@.service.d/subiquity-serial.conf

@@ -0,0 +1,9 @@
+[Unit]
+Description=Subiquity, the installer for Ubuntu Server %I
+After=snapd.seeded.service
+StartLimitInterval=0
+
+[Service]
+Environment=SNAP_REEXEC=0
+ExecStart=
+ExecStart=/usr/bin/snap run subiquity.subiquity-service %I

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/serial-getty@sclp_line0.service.d/subiquity-serial.conf

@@ -0,0 +1,4 @@
+[Service]
+StandardOutput=tty
+ExecStart=
+ExecStart=/usr/bin/snap run subiquity --ssh

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/snap.subiquity.subiquity-service.service.d/subiquity.conf

@@ -0,0 +1,14 @@
+[Unit]
+IgnoreOnIsolate=yes
+After=systemd-user-sessions.service plymouth-quit-wait.service snap.seeded.service
+
+[Service]
+Environment=SNAP_REEXEC=0
+UtmpIdentifier=tty1
+TTYPath=/dev/tty1
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+KillMode=process
+IgnoreSIGPIPE=no
+SendSIGHUP=yes

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/snapd.service.d/no-reexec.conf

@@ -0,0 +1,2 @@
+[Service]
+Environment=SNAP_REEXEC=0

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/system/subiquity_config.mount

@@ -0,0 +1,4 @@
+[Mount]
+What=/dev/disk/by-uuid/00c629d6-06ab-4dfd-b21e-c3186f34105d
+Where=/subiquity_config
+Type=ext4

live-build/ubuntu-core-desktop/includes.chroot.live/usr/lib/systemd/systemd-networkd-wait-online

@@ -0,0 +1 @@
+/bin/true

live-build/ubuntu-core-desktop/includes.chroot/etc/hosts

@@ -0,0 +1,9 @@
+127.0.0.1	localhost.localdomain	localhost
+::1		localhost6.localdomain6	localhost6
+
+# The following lines are desirable for IPv6 capable hosts
+::1     localhost ip6-localhost ip6-loopback
+fe00::0 ip6-localnet
+ff02::1 ip6-allnodes
+ff02::2 ip6-allrouters
+ff02::3 ip6-allhosts