Ubuntu Autoinstall ISO netboot (PXE)

I need to install machines from the network using PXE. I already have an ISO (22.04), which I generated to work with my own user-data (autoinstall).

I found some ways over the internet to use PXE with Ubuntu with autoinstall, but not one with an ISO already generated with its own autoinstall / user-data.

I have a PXE machine that already works properly over HTTP and an ISO that is located in NFS; I need to know what exactly to add to the file that should contain something like the following -

LABEL ubuntu-autoinstall
        MENU label Install Ubuntu - autoinstall
        KERNEL vmlinuz
        INITRD initrd
        APPEND nfs:generated_ubuntu.iso

The simplest method is to make your custom ISO available over HTTP. The pxelinux configuration would then look like

LABEL ubuntu-autoinstall
        MENU DEFAULT
        MENU label Install Ubuntu - autoinstall
        KERNEL vmlinuz
        INITRD initrd
        APPEND root=/dev/ram0 ramdisk_size=1500000 ip=dhcp autoinstall cloud-config-url=/dev/null ds=nocloud;s=file://cdrom/YOURPATH/ url=http://YOURWEBSERVER/YOURCUSTOMISOFILE

This should be just like the examples you've found except that

• the url= argument points to your custom ISO
• the ds= argument points to the path on the ISO where you have added the autoinstall files. The ISO will be available mounted at /cdrom.