kubevirt cloud-init配置
https://cloudinit.readthedocs.io/en/latest/reference/examples.html （示例）
https://cloudinit.readthedocs.io/en/latest/reference/faq.html （常见问题）
https://cloudinit.readthedocs.io/en/latest/howto/debug_user_data.html （检查user_data）
https://cloudinit.readthedocs.io/en/latest/howto/locate_files.html （配置文件）
https://cloudinit.readthedocs.io/en/latest/reference/network-