Comment 15 for bug 2037417

I believe reproducer is:

wget https://images.maas.io/ephemeral-v3/candidate/mantic/amd64/20231004.1/ga-23.10/generic/boot-kernel
wget https://images.maas.io/ephemeral-v3/candidate/mantic/amd64/20231004.1/ga-23.10/generic/boot-initrd

qemu-system-x86_64 -m 4G -smp 2 -nic user,model=virtio-net-pci -kernel boot-kernel -initrd boot-initrd --append 'ip=dhcp root=squash:http://images.maas.io/ephemeral-v3/candidate/mantic/amd64/20231004.1/squashfs overlayroot=tmpfs overlayroot_cfgdisk=disabled systemd.log_level=debug systemd.log_target=console systemd.journald.forward_to_console=1 debug=y'

for faster download you might want to have squashfs on local lan