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Last active February 4, 2025 08:04
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Ubuntu 20.04.3 AutoInstall
Raw
HowTo
# For recent versions of Ubuntu:
- https://www.pugetsystems.com/labs/hpc/ubuntu-22-04-server-autoinstall-iso/
# Docs:
- https://wiki.ubuntu.com/FoundationsTeam/AutomatedServerInstalls
- https://wiki.ubuntu.com/FoundationsTeam/AutomatedServerInstalls/ConfigReference
- https://cloudinit.readthedocs.io/en/latest/topics/datasources/nocloud.html
- https://discourse.ubuntu.com/t/please-test-autoinstalls-for-20-04/15250/53
# Download ISO Installer:
wget https://ubuntu.volia.net/ubuntu-releases/20.04.3/ubuntu-20.04.3-live-server-amd64.iso
# Create ISO distribution dirrectory:
mkdir -p iso/nocloud/
# Extract ISO using 7z:
7z x ubuntu-20.04.3-live-server-amd64.iso -x'![BOOT]' -oiso
# Or extract ISO using xorriso and fix permissions:
xorriso -osirrox on -indev "ubuntu-20.04.3-live-server-amd64.iso" -extract / iso && chmod -R +w iso
# Create empty meta-data file:
touch iso/nocloud/meta-data
# Copy user-data file:
cp user-data iso/nocloud/user-data
# Update boot flags with cloud-init autoinstall:
## Should look similar to this: initrd=/casper/initrd quiet autoinstall ds=nocloud;s=/cdrom/nocloud/ ---
sed -i 's|---|autoinstall ds=nocloud\\\;s=/cdrom/nocloud/ ---|g' iso/boot/grub/grub.cfg
sed -i 's|---|autoinstall ds=nocloud;s=/cdrom/nocloud/ ---|g' iso/isolinux/txt.cfg
# Disable mandatory md5 checksum on boot:
md5sum iso/.disk/info > iso/md5sum.txt
sed -i 's|iso/|./|g' iso/md5sum.txt
# (Optionally) Regenerate md5:
# The find will warn 'File system loop detected' and return non-zero exit status on the 'ubuntu' symlink to '.'
# To avoid that, temporarily move it out of the way
mv iso/ubuntu .
(cd iso; find '!' -name "md5sum.txt" '!' -path "./isolinux/*" -follow -type f -exec "$(which md5sum)" {} \; > ../md5sum.txt)
mv md5sum.txt iso/
mv ubuntu iso
# Create Install ISO from extracted dir (ArchLinux):
xorriso -as mkisofs -r \
-V Ubuntu\ custom\ amd64 \
-o ubuntu-20.04.3-live-server-amd64-autoinstall.iso \
-J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
-boot-load-size 4 -boot-info-table \
-eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot \
-isohybrid-gpt-basdat -isohybrid-apm-hfsplus \
-isohybrid-mbr /usr/lib/syslinux/bios/isohdpfx.bin \
iso/boot iso
# Create Install ISO from extracted dir (Ubuntu):
xorriso -as mkisofs -r \
-V Ubuntu\ custom\ amd64 \
-o ubuntu-20.04.3-live-server-amd64-autoinstall.iso \
-J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
-boot-load-size 4 -boot-info-table \
-eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot \
-isohybrid-gpt-basdat -isohybrid-apm-hfsplus \
-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
iso/boot iso
# After install:
- login with 'root:root' and change root user password
- set correct hostname with 'hostnamectl'
Raw
user-data
#cloud-config
autoinstall:
version: 1
interactive-sections:
- network
- storage
locale: en_US.UTF-8
keyboard:
layout: us
ssh:
allow-pw: true
install-server: false
late-commands:
- curtin in-target --target=/target -- apt-get --purge -y --quiet=2 remove apport bcache-tools btrfs-progs byobu cloud-guest-utils cloud-initramfs-copymods cloud-initramfs-dyn-netconf friendly-recovery fwupd landscape-common lxd-agent-loader ntfs-3g open-vm-tools plymouth plymouth-theme-ubuntu-text popularity-contest rsync screen snapd sosreport tmux ufw
- curtin in-target --target=/target -- apt-get --purge -y --quiet=2 autoremove
- curtin in-target --target=/target -- apt-get clean
- sed -i 's/ENABLED=1/ENABLED=0/' /target/etc/default/motd-news
- sed -i 's|# en_US.UTF-8 UTF-8|en_US.UTF-8 UTF-8|' /target/etc/locale.gen
- curtin in-target --target=/target -- locale-gen
- ln -fs /dev/null /target/etc/systemd/system/connman.service
- ln -fs /dev/null /target/etc/systemd/system/display-manager.service
- ln -fs /dev/null /target/etc/systemd/system/motd-news.service
- ln -fs /dev/null /target/etc/systemd/system/motd-news.timer
- ln -fs /dev/null /target/etc/systemd/system/plymouth-quit-wait.service
- ln -fs /dev/null /target/etc/systemd/system/plymouth-start.service
- ln -fs /dev/null /target/etc/systemd/system/systemd-resolved.service
- ln -fs /usr/share/zoneinfo/Europe/Kiev /target/etc/localtime
- rm -f /target/etc/resolv.conf
- printf 'nameserver 8.8.8.8\nnameserver 1.1.1.1\noptions timeout:1\noptions attempts:1\noptions rotate\n' > /target/etc/resolv.conf
- rm -f /target/etc/update-motd.d/10-help-text
- rm -rf /target/root/snap
- rm -rf /target/snap
- rm -rf /target/var/lib/snapd
- rm -rf /target/var/snap
- curtin in-target --target=/target -- passwd -q -u root
- curtin in-target --target=/target -- passwd -q -x -1 root
- curtin in-target --target=/target -- passwd -q -e root
- sed -i 's|^root:.:|root:$6$3b873df474b55246$GIpSsujar7ihMzG8urUKpzF9/2yZJhR.msyFRa5ouGXOKRCVszsc4aBcE2yi3IuFVxtAGwrPKin2WAzK3qOtB.:|' /target/etc/shadow
user-data:
disable_root: false
Raw
user-data_with_ssh_and_project_quota
#cloud-config
autoinstall:
version: 1
interactive-sections:
- network
- storage
locale: en_US.UTF-8
keyboard:
layout: us
ssh:
allow-pw: true
install-server: false
late-commands:
- curtin in-target --target=/target -- apt-get --purge -y --quiet=2 remove apport bcache-tools btrfs-progs byobu cloud-guest-utils cloud-initramfs-copymods cloud-initramfs-dyn-netconf friendly-recovery fwupd landscape-common lxd-agent-loader ntfs-3g open-vm-tools plymouth plymouth-theme-ubuntu-text popularity-contest screen snapd sosreport tmux ufw
- curtin in-target --target=/target -- apt-get -qq update
- curtin in-target --target=/target -- apt-get -y install wget gnupg python2.7 openssh-server
- curtin in-target --target=/target -- apt-get -qq update
- curtin in-target --target=/target -- apt-get -y dist-upgrade
- curtin in-target --target=/target -- apt-get --purge -y --quiet=2 autoremove
- sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /target/etc/ssh/sshd_config
- sed -i 's/ENABLED=1/ENABLED=0/' /target/etc/default/motd-news
- sed -i 's|# en_US.UTF-8 UTF-8|en_US.UTF-8 UTF-8|' /target/etc/locale.gen
- curtin in-target --target=/target -- locale-gen
- ln -fs /dev/null /target/etc/systemd/system/connman.service
- ln -fs /dev/null /target/etc/systemd/system/display-manager.service
- ln -fs /dev/null /target/etc/systemd/system/motd-news.service
- ln -fs /dev/null /target/etc/systemd/system/motd-news.timer
- ln -fs /dev/null /target/etc/systemd/system/plymouth-quit-wait.service
- ln -fs /dev/null /target/etc/systemd/system/plymouth-start.service
- ln -fs /dev/null /target/etc/systemd/system/systemd-resolved.service
- ln -fs /usr/share/zoneinfo/Europe/Kiev /target/etc/localtime
- rm -f /target/etc/resolv.conf
- printf 'nameserver 8.8.8.8\nnameserver 1.1.1.1\noptions timeout:1\noptions attempts:1\noptions rotate\n' > /target/etc/resolv.conf
- rm -f /target/etc/update-motd.d/10-help-text
- rm -rf /target/root/snap
- rm -rf /target/snap
- rm -rf /target/var/lib/snapd
- rm -rf /target/var/snap
- curtin in-target --target=/target -- passwd -q -u root
- curtin in-target --target=/target -- passwd -q -x -1 root
- curtin in-target --target=/target -- passwd -q -e root
- sed -i 's|^root:.:|root:$6$3b873df474b55246$GIpSsujar7ihMzG8urUKpzF9/2yZJhR.msyFRa5ouGXOKRCVszsc4aBcE2yi3IuFVxtAGwrPKin2WAzK3qOtB.:|' /target/etc/shadow
- sed -i 's/ext4 defaults/ext4 prjquota,lazytime/g' /target/etc/fstab
- findmnt --real -U -n -t ext4 -o source | awk '{system("umount -l "$1)}'
- blkid -t TYPE="ext4" -o device | awk '{system("tune2fs -O project,quota -Q prjquota "$1)}'
user-data:
disable_root: false
@surter
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surter commented May 26, 2023

image

@surter
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surter commented May 26, 2023

image

@don-ferris
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Help! I've looked high and low and I can't find anything that clearly shows how to set a static IP in the autoinstallation configuration file. The closest I've come is this (from here:https://netplan.readthedocs.io/en/latest/netplan-yaml/):

network:
  ethernets:
    eth0:
      addresses:
        - "10.0.0.15/24":
            lifetime: 0
            label: "maas"
        - "2001:1::1/64"

which is ALMOST clear - except for that last line. What IS that? Can I omit it or is it necessary? If it's necessary, where/how d I find it?

@Quixus
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Quixus commented Sep 5, 2024

It is an IPv6 address. Whether you need it depends on your setup.

The configuration will apply the addresses to eth0 but it still lacks nameservers and routes to function as probably expected. See the netplan manpage for infomration how to add those.

@dmuiX
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dmuiX commented Sep 5, 2024

Jip. If you need examples. Just enter netplan static ip adress to Google there come 100 examples on how to do it ;). One is even in the netplan docs. You just have look for it ;)
https://netplan.readthedocs.io/en/latest/using-static-ip-addresses/

@dpflick
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dpflick commented Sep 5, 2024 via email

@don-ferris
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The last line is an IPv6 address which we don't use so you can leave that alone.

Thank you!

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