Everybody is good!
As you all know, to use the client's network card name in cloud-init, you must fill in the exact name of the network card interface.
This was easy in version 7 and before, which usually started with EN0.
After version 8, however, the naming conventions for network cards changed a lot. In my own test environment, for example, I started with ENS3.
I'm not sure what naming convention it uses, which would make it impossible to specify nic information using cloud-init.
Could you help me explain how to deal with this problem?
Thank you very much!