[systemd-devel] systemd --user fails to start a user service at the first time

[Han]

I have a follow-up question inline. Thanks.

On Thu, Oct 28, 2021 at 10:47 PM Han <keepsimple at gmail.com> wrote:

>
> On Thu, Oct 28, 2021 at 10:25 PM Andrei Borzenkov <arvidjaar at gmail.com>
> wrote:
>
>> On 29.10.2021 04:54, Han wrote:
>> > Hi,
>> >
>> > I'm a newbie to systemd. I encountered a strange problem when using
>> > systemd user
>> > service in Debian 10 (hardware: Raspberry Pi 4), systemd version 241.
>> >
>> > I posted this question on stackoverflow but didn't get answers yet.
>> Hence
>> > trying to ask here. My apologies if this is too basic.
>> >
>> >    1. I created a new service unit file at here:
>> >    /home/pi/.config/systemd/user/foo.service
>> >
>> > its content looks like this:
>> >
>> > [Service]
>> > ExecStart=/home/pi/test/foo
>> > WorkingDirectory=/home/pi/test
>> >
>> >
>> >    1. I tried to start this service, but it failed:
>> >
>> > $ systemctl --user start foo
>> > Failed to start foo.service: Unit foo.se
>>
>> Does it work after
>>
>> systemctl --user daemon-reload
>>
>> ?
>>
>
> Yes, it worked after `daemon-reload`.  Thank you so much!
>


"daemon-reload" reloads all unit files in the system.  It seems to me such
a big remedy for starting a single service.  Is this the expected workflow
or a workaround?

Also I tried to add a 2nd service "foo2.service" in the same way,  now I
don't have to run "daemon-reload" and it can start.  I'm wondering why.

Thanks
Han


>
> Han
>
>
>
>>
>> rvice not found.
>> >
>> > However, systemd can list this unit file when doing this:
>> >
>> > $systemctl --user list-unit-files --type service | grep foo
>> > foo.service                      static
>> >
>> > Moreover, when I added [Install] section in the unit file:
>> >
>> > [Install]
>> > WantedBy=multi-user.target
>> >
>>
>> User instance does not have this target.
>>
>> > and run $systemctl --user enable foo , it worked.
>> >
>> > Even more, after that I removed the unit file, and recreated the unit
>> file
>> > without the [Install] section, now I start the service and the original
>> > problem is no longer seen.
>> >
>> > So it seems like only when I try to create a new user service for the
>> first
>> > time on the system, without using [Install], it will fail to start.
>> >
>> > Any ideas why this is happening? (btw, I don't want to have [Install]
>> for
>> > this service.)
>> >
>> > Or is this a known issue fixed in a later release?
>> >
>> > Thanks
>> >
>> > Han
>> >
>>
>>
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