ovirt_vm.initialization_custom_script

[NikSudo]

What is expecting in resource.ovirt_vm.initialization_custom_script ? Bash-scrip? Cloud-init file?
If cloud-init, do I can use some like initialization_custom_script = file("/path/to/cloud-init.tpl") ?

[ghost]

I believe, that depends on what you have installed inside your VM. If you have installed Cloud-Init, then a file for that. Your VM image needs to know how to get this file and how to execute it.