RedHat /Implicit/default connection(s)

[Thomas HUMMEL]

On 4/29/24 18:33, Thomas HUMMEL wrote:

> I still don't understand what is creating this ifcfg-<int> from an empty 
> image NM-profile-wise.

Actually I found it this time : there is a script in initialramdisk's 
/usr/sbin which indeed created the ifcfg-<int> profile with only 
(DEVICE/BOOTPROTO/HWADDR/ONBOOT and no "NAME"

So my theory at this point is the following :

1. initrd creates the ifcfg-enp33s0f0 profile (BOOTPROTO == dhcp)
2. initrd NM sees the active profile
3. swith_root deletes the file while emptying initial rootfs
4. (this is expected) a postscript of provisioning software installs 
another ifcfg- profile for enp33s0f0 with a higher autoconnect priority 
: I guess this would be enough for NM to switch profile or does the 
poscript have to take the connection down before autoconnect of the 
other profile can occur ?

Still it does not explain where the Wired Wired Connection 
/run/NetworkManager/system-connections/default_connection.nmconnection
  could come from as, I as said earlier my understanding is that, for NM 
to do anything in initrd mode, it must have some cmdline to parse (which 
I don't see)...

-- 
TH
> 
> dracut --list-modules outputs both legacy and NM modules so I'm not sure 
> (and don't know how to check it) which one is actually called.
> 
> Besides, my understanding is that either way, some parameters (like at 
> least dhcp) would need to be passed on cmdline. So unless iPXE is able 
> to do that (appending network config to cmdline) I still quite confused.
> 
> Thanks for your help
>