On Tue, Aug 24, 2021 at 11:17 AM Tommy Sway <sz_cuitao@163.com> wrote:

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!
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Hi,

this is called Predictable Network Names and it is the default policy for net interface naming in el8. There are a couple tricks you can do to mitigate that,

you can disable it, or predict the name based on your configuration PCI slot etc [0]. There is a documentation for RHEL that explains it [1].

There is also another option and that's using a custom udev rule to assign whatever name you want based on some identifiers like MAC, PCI addr etc.

Hopefully this helps.

Best regards,

Ales

Ales Musil

Software Engineer - RHV Network

Red Hat EMEA

amusil@redhat.com IM: amusil