File VM_config.ign of Package kvm-container-modular-libvirt

# openssl passwd
# password: opensuse
{
  "ignition": { "version": "3.1.0" },
  "passwd": {
    "users": [
      {
        "name": "root",
        "passwordHash": "iNhMyEZAbxWvA"
      }
    ]
  }
}