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0e1f616
(Get the code!)
First of all, both examples from comment #3 work (subiquity also installs that way).
I guess it's obvious that the '--location' doesn't work with the directory tree anymore due to the change in the URL from
http://
to:
http://
(notice that <eoan> http://
As far as I can tell the URL change was done by intention and to indicate that the default installer for 20.04 is no longer d-i, but subiquity.
The '--cdrom' is a valid option for many cases, but unfortunately not for all, since it doesn't allow the '-extra-args' argument - '-extra-args' only works in combination with '--location', not with '--cdrom'.
I currently see two options, one is renaming the URL back and the second option is to directly specify kernel and initrd, like:
ubuntu@s1lp11:~$ virt-install --name ubuntu20-guest1 --memory 4096 --vcpus 4 --disk "size=4" --install kernel=http://
As far as I can tell netboot images/files at 'ports.ubuntu.com' are all d-i only.
For subiquity one needs to grab kernel and initrd for potential netbooting from the focal-live-
Btw. preseed is the non-interactive installation method based on d-i.
With the new subiquity installer the preseed successor is 'autoinstallation' - for more details let me refer to:
Automated Server Installs for 20.04
https:/
Automated Server Installs Config File Reference
https:/
JSON Schema for autoinstall config
https:/
Autoinstall Quick Start
https:/
Autoinstall Quick Start for s390x
https:/