Re: systemd network interface configuration (was "Re: systemd woes continue")

Hi Bob!

On 9/19/19 7:09 AM, Bob Tracy wrote:
> On Wed, Sep 18, 2019 at 11:46:06AM +0200, John Paul Adrian Glaubitz wrote:
>> Your permanent bashing of systemd makes answering your mails stressful
>> for me.
> 
> Adrian -- please accept my apology for my rantings...  They contribute
> nothing to the conversation, and as you note, irritate the very people
> in the best position to render needed assistance.

It's okay. Let's try to tackle your remaining problems.

> Going back to a previous message you sent, you suggested looking at a
> few systemd network-related services:
> 
> (1) systemd-networkd: this is currently showing "disabled" on my system
>      (vendor preset: enabled).
> 
> (2) resolver-related systemd services such as "resolvconf" and "systemd-resolved":
>      "resolvconf" is "enabled", but "systemd-resolved" is "disabled"
>      (vendor preset: enabled).
> 
> None of the services mentioned above have any configuration files other
> than the defaults.

Both systemd services here are "systemd-networkd" and "systemd-resolved" and
both are disabled by default. "resolvconf" is not related to systemd.

> So, I guess the main question on the table is, what's the best path
> forward to ensure network interfaces are brought up and configured
> automatically at boot time?  Related to that question: is the use of
> "/etc/network/interfaces" deprecated?  That's where my network
> configuration details currently exist, and that used to be sufficient,
> even after the migration from the old-style init program/scripts to
> "systemd".  A sanitized copy of my current "interfaces" file is
> attached.
Using /etc/network/interfaces should still work, so the easiest thing
to do would be to check whether your interface names have been renamed.

Looking at your /etc/network/interfaces, I can see that you are using
the modern driver-oriented device names while for your cable connection
you are stuck with eth0.

So, my assumption is that udev is indeed renaming your network interfaces
and while you (or some script) has set the new interface names for your
wireless card in /etc/network/interfaces, you are still using "eth0" for
your wired network card.

So, can you please type "ip a" and check what device name is actually assigned
to your wired card and if it differs from "eth0", adjust your /etc/network/
interfaces file?

If your wired card is actually named "eth0", then the problem is somewhere
else and we need to proceed in your next mail.

Adrian