Re: unbound and fetchmail (was: Re: Remove route '169.254.0.0/16 dev ovs-system')

[Max Nikulin <manikulin@gmail.com>]

On 28/02/2023 17:25, Christoph Brinkhaus wrote:
> I will just inform about the status. Everything is fine now. A word
> about systemd-networkd-wait-online: With this service running there
> has been even a delay of 1-2 seconds when switching from one console
> to a different one (the consoles when X is not running). I have no
> idea about that side effect.

Does it happen each time or it is getty startup time? In the latter case 
you may try (for various console numbers)

    systemd-analyze critical-chain getty@tty1.service

> Now I have disabled systemd-networkd-wait-online and I have add a
> comment in the last line of /usr/lib/systemd/system//systemd-networkd.service
> which is now
> # 28.2.2023 Also=systemd-networkd-wait-online.service

Ideally the root cause of strange behavior should be debugged. Perhaps 
some dependency should be removed from e.g. multi-user.target or 
network-online.target. Probably "systemd-analyze critical-chain" may 
give some hints.

Any case I would not touch files in /usr/lib/systemd. It should confuse 
tools like systemd-delta. It is possible to override specific properties 
by creating of drop-in snippets in 
/etc/systemd/system/systemd-networkd.service.d/. See systemd.unit(5), 
e.g. run

   systemctl edit systemd-networkd.service

[Install]
# Clear
Also=
# Add other values from the original file
Also=systemd-networkd.socket

Check result

   systemd-analyze verify systemd-networkd.service

I hope, it is a better way to apply your workaround. I can not suggest a 
better solution for tty delay issue, but I think it exists. "Also=" 
should affect "systemctl enable systemd-networkd.service" and "disable" 
commands, so I puzzled why it helps at all.