2

I created config files

echo 'password: asd' > userdata
echo 'local-hostname: localhost' > metadata

Then created iso from them

genisoimage -output geniso.iso -volid cidata -joliet -rock userdata metadata

And created QEMU image

virt-install --connect qemu:///system virt-type qemu --name mymachine --memory 4096 --vcpus=2 --os-type linux --os-variant ubuntu18.04 --disk path=ubuntu-18.04-server-cloudimg-amd64.img,format=qcow2 --disk  geniso.iso,device=cdrom --import --network network=default --noautoconsole

Screenschot below shows that machine has been changed to localhost but the password did not work. enter image description here

0

The cloud-init config format is a bit more structured than what you used. And the minimal change to your case is to recognize that the leading #cloud-init isn't optional.

Your question is pretty close to this or this example, so I recommend to get your remaining details there as needed.

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