Comment 27 for bug 1872941

Hi Peter,
for the (s390x) kernel and initrd of d-i (legacy) usage, the URL is still:
http://ports.ubuntu.com/ubuntu-ports/dists/bionic/main/installer-s390x
The problem was that virt-install expected .../current/images as tail and refused to work with .../current/legacy-images, but this is solved now.
(full path/URL:
http://ports.ubuntu.com/ubuntu-ports/dists/focal/main/installer-s390x/current/legacy-images/ )
But you need to have your 'virtinst' package (that contains virt-install) updated to the very latest level (that incl. Dimitri's modification).

The URL is different depending on the architecture:
For example for amd64 the location/URL is:
http://archive.ubuntu.com/ubuntu/dists/bionic/main/installer-amd64
(full path/URL: http://archive.ubuntu.com/ubuntu/dists/bionic/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/ )