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Add beta ubuntu server 26.04 autoinstall
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‎autoinstall/generic/ubuntu-server-2604/headless/README.md‎

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# Ubuntu Server 26.04 autoinstall
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## Preparing the ISO
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```
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$ curl -LO \
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https://releases.ubuntu.com/26.04/ubuntu-26.04-beta-live-server-amd64.iso
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docker pull docker.io/boxcutter/ubuntu-autoinstall
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UBUNTU_SERVER_26_04_ISO=ubuntu-26.04-beta-live-server-amd64.iso
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docker run -it --rm \
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--mount type=bind,source="$(pwd)",target=/data \
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docker.io/boxcutter/ubuntu-autoinstall \
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--autoinstall autoinstall.yaml \
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--grub grub.cfg \
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--config-root \
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--source ${UBUNTU_SERVER_26_04_ISO} \
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--destination ${UBUNTU_SERVER_26_04_ISO}-autoinstall.iso
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# Verify that the autoinstall is located in root
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$ isoinfo -R -i \
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${UBUNTU_SERVER_26_04_ISO}-autoinstall.iso -f | grep -i autoinstall
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/autoinstall.yaml
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```
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## Testing the autoinstall in a VM
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```
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UBUNTU_SERVER_26_04_ISO=ubuntu-26.04-beta-live-server-amd64.iso
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UBUNTU_SERVER_26_04_AUTOINSTALL_ISO=${UBUNTU_SERVER_26_04_ISO}-autoinstall.iso
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sudo cp ${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO} \
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/var/lib/libvirt/iso/${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO}
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virt-install \
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--connect qemu:///system \
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--name ubuntu-server-2604 \
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--boot uefi \
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--cdrom /var/lib/libvirt/iso/${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO} \
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--disk pool=default,format=qcow2,bus=virtio,size=60 \
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--memory 3192 \
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--vcpus 2 \
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--os-variant ubuntu24.04 \
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--network network=host-network,model=virtio \
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--graphics none \
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--noautoconsole \
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--console pty,target_type=serial \
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--debug
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# To view install. Once it completes it will stop the vm:
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$ virsh console ubuntu-server-2604
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$ virt-viewer ubuntu-server-2604
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# Start the VM again to verify everything looks good
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$ virsh start ubuntu-server-2604
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$ virsh console ubuntu-server-2604
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```
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```
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virsh snapshot-create-as \
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--domain ubuntu-server-2604 \
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--name clean \
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--description "Initial install"
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virsh snapshot-list ubuntu-server-2604
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virsh snapshot-revert ubuntu-server-2604
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virsh snapshot-delete ubuntu-server-2604
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virsh shutdown ubuntu-server-2604
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virsh shutdown ubuntu-server-2604
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```
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```

‎autoinstall/generic/ubuntu-server-2604/headless/autoinstall.yaml‎

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#cloud-config
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autoinstall:
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version: 1
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network:
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version: 2
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ethernets:
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enp1s0:
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dhcp4: false
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dhcp6: false
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optional: true
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bridges:
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br0:
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interfaces: [enp1s0]
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dhcp4: true
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dhcp6: false
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accept-ra: false
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link-local: []
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storage:
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layout:
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name: lvm
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sizing-policy: all
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timezone: UTC
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keyboard:
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layout: us
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apt:
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preserve_sources_list: false
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mirror-selection:
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primary:
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# http://archive.ubuntu.com/ubntu
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- uri: "https://crake-nexus.org.boxcutter.net/repository/ubuntu-archive-apt-proxy/ubuntu"
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arches: [i386, amd64]
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# http://ports.ubuntu.com/ubuntu-ports
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- uri: "https://crake-nexus.org.boxcutter.net/repository/ubuntu-ports-proxy/ubuntu-ports"
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arches: [s390x, arm64, armhf, powerpc, ppc64el, riscv64]
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packages:
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- qemu-guest-agent
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ssh:
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install-server: yes
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allow-pw: yes
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late-commands:
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# Because we're using preserve_hostname to allow manual setting of the
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# hostname, set an initial hostname manually - the identity block requires
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# a username and it doesn't support flexible enough configuration
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# NOTE: 'curtin in-target' doesn't invoke a shell, so you need to run
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# commands within a shell that need redirection.
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- curtin in-target -- sh -c 'echo generic-server > /etc/hostname'
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# Configure grub to use serial console for display
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- curtin in-target -- sed -ie 's/GRUB_TIMEOUT=.*/GRUB_TIMEOUT=30/' /etc/default/grub
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- curtin in-target -- sed -ie 's/GRUB_TIMEOUT_STYLE=.*/GRUB_TIMEOUT=countdown/' /etc/default/grub
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- curtin in-target -- sed -ie 's/GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX="console=tty1 console=ttyS0,115200n8 systemd.wants=serial-getty@ttyS0"/' /etc/default/grub
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- curtin in-target -- sed -ie 's/#GRUB_TERMINAL=.*/GRUB_TERMINAL="console serial"/' /etc/default/grub
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- curtin in-target -- update-grub
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user-data: # cloud-init starts here
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preserve_hostname: true
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users:
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# Temporary user for bootstrapping
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- name: autobot
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uid: 63112
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primary_group: users
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groups: users
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shell: /bin/bash
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# Testing with a plaintext password
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plain_text_passwd: superseekret
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# Replace with your generated salted SHA-512 hash w/ 'openssl passwd -6'
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# passwd: "$6$W32sh2s3EDp01Jvnif.hT2MB.dZ9mSx6txdPiz..."
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sudo: ALL=(ALL) NOPASSWD:ALL
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lock_passwd: false
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ssh_authorized_keys:
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# taylor
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- ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEWerEkujoB7ipGnWJwnPGFu3DuUQJtc1zB6YqjGRziE sheila
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- ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINRK4hkcpUiaSkiLEytgwMYcKylBioXPLx1TnwJFrLPl mahowald
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chpasswd:
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expire: false
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ssh_pwauth: true

‎autoinstall/generic/ubuntu-server-2604/headless/build.sh‎

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#!/bin/bash
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set -x
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UBUNTU_SERVER_26_04_ISO=ubuntu-26.04-beta-live-server-amd64.iso
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UBUNTU_SERVER_26_04_AUTOINSTALL_ISO="${UBUNTU_SERVER_26_04_ISO}-autoinstall.iso"
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sudo rm "${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO}"
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docker pull docker.io/boxcutter/ubuntu-autoinstall
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docker run -it --rm \
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--mount type=bind,source="$(pwd)",target=/data \
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docker.io/boxcutter/ubuntu-autoinstall \
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--autoinstall autoinstall.yaml \
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--grub grub.cfg \
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--config-root \
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--source ${UBUNTU_SERVER_26_04_ISO} \
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--destination ${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO}
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sudo rm "/var/lib/libvirt/iso/${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO}"
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sudo cp ${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO} \
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/var/lib/libvirt/iso/${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO}
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virt-install \
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--connect qemu:///system \
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--name ubuntu-server-2604 \
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--boot uefi \
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--cdrom /var/lib/libvirt/iso/${UBUNTU_SERVER_26_04_AUTOINSTALL_ISO} \
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--disk pool=default,format=qcow2,bus=virtio,size=60 \
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--memory 3192 \
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--vcpus 2 \
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--os-variant ubuntu24.04 \
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--network network=host-network,model=virtio \
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--graphics none \
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--noautoconsole \
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--console pty,target_type=serial \
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--debug

‎autoinstall/generic/ubuntu-server-2604/headless/clean.sh‎

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virsh destroy ubuntu-server-2604
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virsh undefine ubuntu-server-2604 --nvram --remove-all-storage

‎autoinstall/generic/ubuntu-server-2604/headless/grub.cfg‎

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set timeout=30
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serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1
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terminal_input console serial
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terminal_output console serial
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menuentry "Ubuntu Server Autoinstall" {
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set gfxpayload=text
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linux /casper/vmlinuz console=tty1 console=ttyS0,115200n8 systemd.wants=serial-getty@ttyS0 autoinstall ---
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initrd /casper/initrd
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}
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menuentry "Ubuntu Server with the HWE kernel" {
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set gfxpayload=text
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linux /casper/hwe-vmlinuz autoinstall ds=nocloud\;s=/cdrom/nocloud/ ---
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initrd /casper/hwe-initrd
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}
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grub_platform
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if [ "$grub_platform" = "efi" ]; then
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menuentry 'Boot from next volume' {
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exit 1
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}
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menuentry 'UEFI Firmware Settings' {
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fwsetup
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}
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else
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menuentry 'Test memory' {
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linux16 /boot/memtest86+.bin
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}
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fi

‎autoinstall/generic/ubuntu-server-2604/headless/test.sh‎

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ip=$(virsh domifaddr ubuntu-server-2604 --source agent \
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| awk '$1!="lo" && /ipv4/ {print $4; exit}' \
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| cut -d'/' -f1
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)
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docker container run -t --rm \
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--mount type=bind,source="$(pwd)/test",target=/share \
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--env ip \
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docker.io/boxcutter/cinc-auditor exec . \
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--no-distinct-exit \
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--no-create-lockfile \
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--password superseekret \
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--target "ssh://autobot@${ip}"

‎autoinstall/generic/ubuntu-server-2604/headless/test/controls/ubuntu.rb‎

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describe command('hostname') do
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its('stdout.strip') { should cmp 'generic-server' }
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end
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describe file('/etc/hostname') do
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its('content.strip') { should cmp 'generic-server' }
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end

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