sudo apt install debootstrap schroot

[hardy_i386]
description=Ubuntu 8.04 Hardy for i386
location=/srv/chroot/hardy_i386
personality=linux32
root-users=mephisto
run-setup-scripts=true
run-exec-scripts=true
type=directory
users=mephisto

sudo mkdir -p /srv/chroot/hardy_i386
sudo debootstrap --variant=buildd --arch=i386 hardy /srv/chroot/hardy_i386 http://old-releases.ubuntu.com/ubuntu/

schroot -c hardy_i386 -u root