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-