Re: No error even a Required= service does not exist

["Bruce A. Johnson" <bjohnson@xxxxxxxxxxxxxxxxxxxxx>]

Joerg,

I'm not anything near an expert, but perhaps you could try "PartOf=..."
in the Unit section for the dependent service. I'll be interested in
hearing others' opinion of this idea. But, really, a missing service
file shouldn't get out the door.

Bruce A. Johnson 
Chantilly, VA

On 25/11/2019 08.07, Jörg Weinhardt wrote:
> Hi,
>
> the behavior of systemd is not quite clear to me:
> I have a service which requires another service to be started and running,
> so I use a Requires= dependency to the required service.
> But if the required service does not exist at all, there is no error message from systemd.
> e.g. 
>
> Requires=xyz.service 
>
> produces no complaint and starts the service even if there is no xyz.service
> Is this the normal behavior or can I configure systemd to throw an error in this case?
>
> If I write
> "Requires=xyz"
>
> there will be a message: Failed to add dependency on xyz, ignoring: Invalid argument
> Does that error mean that "xyz" is not a valid unit name?
>
> Thank you,
> Joerg
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