For your testing here the default content of zipl.conf on a cloud-img KVM guest
$ cat /etc/zipl.conf # This has been modified by the cloud image build process [defaultboot] default=ubuntu
[ubuntu] target = /boot image = /boot/vmlinuz parameters = root=LABEL=cloudimg-rootfs ramdisk = /boot/initrd.img
For your testing here the default content of zipl.conf on a cloud-img KVM guest
$ cat /etc/zipl.conf
# This has been modified by the cloud image build process
[defaultboot]
default=ubuntu
[ubuntu] cloudimg- rootfs
target = /boot
image = /boot/vmlinuz
parameters = root=LABEL=
ramdisk = /boot/initrd.img