[systemd-devel] Starting a service before any networking

[Demi Marie Obenour]

On Tue, Sep 26, 2023 at 11:50:55AM +0100, Mark Rogers wrote:
> I'm sure this is trivial but I've gone round in circles without success.
> 
> I have a script which reads from an SQLite database and generates various
> system configuration files - at the moment these are dhcpcd.conf and
> wpa_supplicant.conf but this might grow in future.
> 
> As such the only dependency the script has is that the filesystem is up and
> running. But the script must complete before anything that the script
> manages the configuration file for.
> 
> My current unit looks like this:
> [Unit]
> Before=networking.service
> After=local-fs.target
> 
> [Service]
> Type=oneshot
> ExectStart=/path/to/script
> 
> [Install]
> RequiredBy=network.target
> 
> Where am I going wrong and what is the right way to do this?
> 
> I've also tried Before=network-pre.target and Wants=network-pre.target
> without success - it was that not working that set me off trying to fix it.

RequiredBy=network-pre.target should be sufficient, but unfortunately
lots of stuff (like systemd-networkd) that should have
Requires=network-pre.target doesn't.
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab
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