ubuntu-autoinstall

Create an ISO for Ubuntu LTS unattended auto-install.

Goals

• Create an ISO that boots itself with a cloud-config auto-installer.
• Publish examples of cloud-config files for BIOS and UEFI boot with LVM.

Required packages (Ubuntu)

• p7zip-full
• p7zip-rar
• wget
• xorriso

Build

The create-iso.sh script downloads a version of the Ubuntu LTS ISO, extracts the contents, adds a cloud-config with meta-data.yml, user-data.yml, and a grub.cfg entry. The script then creates a new, bootable ISO.

To build an ISO:

1. Copy one of user-data-bios.yml, user-data-efi.yml, user-data-bios+efi.yml to user-data.yml
2. Adjust the script and yaml files to meet your needs
3. Run ./create-iso.sh

The user-data-bios+efi.yml file auto-configures itself for either BIOS or UEFI, not both.

The user-data.yml file creates a system which should look something like the following (40GB test run):

ubuntu@ubuntu:~$ lsblk /dev/sda
NAME             MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda                8:0    0  40G  0 disk
├─sda1             8:1    0   1M  0 part
├─sda2             8:2    0   1G  0 part /boot
└─sda3             8:3    0  39G  0 part
  ├─vg1-lv_root  252:0    0   6G  0 lvm  /
  ├─vg1-lv_swap  252:1    0   4G  0 lvm  [SWAP]
  ├─vg1-lv_tmp   252:2    0   4G  0 lvm  /tmp
  ├─vg1-lv_home  252:3    0   4G  0 lvm  /home
  ├─vg1-lv_var   252:4    0   4G  0 lvm  /var
  ├─vg1-lv_log   252:5    0   4G  0 lvm  /var/log
  └─vg1-lv_audit 252:6    0   1G  0 lvm  /var/log/audit

ubuntu@ubuntu:~$ sudo pvs
  PV         VG  Fmt  Attr PSize   PFree
  /dev/sda3  vg1 lvm2 a--  <39.00g <12.00g

Credits

Credit to Dr. Donald Kinghorn who did all the p7zip and xorriso heavy lifting.

Credit to Andrew Lowther for the early-commands cleverness.

Credit to many others who posted sample configs for the various ideas they presented.