Please test autoinstalls for 20.04!

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To follow up on my own question, I managed to have the iso booting with my autoinstall.yml like this:

First I added the .yml to the squashfs:

sudo unsquashfs -d ./squashfs-root -no-progress cd_amd64/casper/installer.squashfs
sudo cp -vf autoinstall.yml squashfs-root/etc/cloud/cloud.cfg.d/90_autoinstall.cfg
sudo rm cd_amd64/casper/installer.squashfs
sudo mksquashfs squashfs-root cd_amd64/casper/installer.squashfs -no-progress -noappend
sudo rm -rf squashfs-root

Then I modified Grubs txt.cfg to add the autoinstall parameter:

label autoinstall
  menu label ^Install Ubuntu Server unattended
  kernel /casper/vmlinuz
  append   initrd=/casper/initrd autoinstall quiet  ---

This runs the autoinstall with the given .yml file.

Just using the content from the /var/log/installer/autoinstall-user-data file of my previous installation resulted in similar errors as @jinxcappa described:

None is not of type ‘string’

I removed the attribute instead of setting it to ‘’, which worked for me. I also had to add version:1 below autoinstall:.

Now I’m also stuck at the point

Command ‘[‘netplan’, ‘apply’]’ returned non-zero exit status 1

The network section is just:

network:
      ethernets:
        ens160: {dhcp4: true}
      version: 2

ens160 is the correct name of the interface, I can confirm this in a second console.

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