Your submission was sent successfully! Close

Autoinstall Quick Start for s390x

The intent of this page is to provide simple instructions to perform an autoinstall in a VM on your machine on s390x.

This page is just a slightly adapted page of the autoinstall quickstart page mapped to s390x.

Download an ISO

At the time of writing (just after the kinetic release), the best place to go is here:
https://cdimage.ubuntu.com/ubuntu/releases/22.10/release/

wget https://cdimage.ubuntu.com/ubuntu/releases/22.10/release/ubuntu-22.10-live-server-s390x.iso -P ~/Downloads

Mount the ISO

mkdir -p ~/iso
sudo mount -r ~/Downloads/ubuntu-22.10-live-server-s390x.iso ~/iso

Write your autoinstall config

This means creating cloud-init config as follows:

mkdir -p ~/www
cd ~/www
cat > user-data << 'EOF'
#cloud-config
autoinstall:
  version: 1
  identity:
    hostname: ubuntu-server
    password: "$6$exDY1mhS4KUYCE/2$zmn9ToZwTKLhCw.b4/b.ZRTIZM30JZ4QrOQ2aOXJ8yk96xpcCof0kxKwuX1kqLG/ygbJ1f8wxED22bTL4F46P0"
    username: ubuntu
EOF
touch meta-data

The crypted password is just “ubuntu”.

Serve the cloud-init config over http

Leave this running in one terminal window:

cd ~/www
python3 -m http.server 3003

Create a target disk

Proceed with a second terminal window:

sudo apt install qemu-utils
...
qemu-img create -f qcow2 disk-image.qcow2 10G
Formatting 'disk-image.qcow2', fmt=qcow2 size=10737418240 cluster_size=65536 lazy_refcounts=off refcount_bits=16

qemu-img info disk-image.qcow2
image: disk-image.qcow2
file format: qcow2
virtual size: 10 GiB (10737418240 bytes)
disk size: 196 KiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    refcount bits: 16
    corrupt: false

Run the install!

sudo apt install qemu-kvm
...

You may need to add the default user to the kvm group: <
>
sudo usermod -a -G kvm ubuntu # re-login to make the changes take effect

kvm -no-reboot -name auto-inst-test -nographic -m 2048 \
    -drive file=disk-image.qcow2,format=qcow2,cache=none,if=virtio \
    -cdrom ~/Downloads/ubuntu-22.10-live-server-s390x.iso \
    -kernel ~/iso/boot/kernel.ubuntu \
    -initrd ~/iso/boot/initrd.ubuntu \
    -append 'autoinstall ds=nocloud-net;s=http://_gateway:3003/ console=ttysclp0'

This will boot, download the config from the server set up in the previous step and run the install.
The installer reboots at the end but the -no-reboot flag to kvm means that kvm will exit when this happens.
It should take about 5 minutes.

Boot the installed system

kvm -no-reboot -name auto-inst-test -nographic -m 2048 \
    -drive file=disk-image.qcow2,format=qcow2,cache=none,if=virtio

This will boot into the freshly installed system and you should be able to log in as ubuntu/ubuntu.

Last updated a month ago. Help improve this document in the forum.