[systemd-devel] Is it possible to load unit files from paths other than default paths ?

[Andrei Borzenkov]

On Mon, Sep 26, 2016 at 12:00 PM, Raghavendra. H. R <raghuhr84 at gmail.com> wrote:
> Andrei,
>
> How to set SYSTEMD_UNIT_PATH in Systemd ?
>

I already answered this in one of earlier replies.

> I checked about systemd source code in github. Please see this link
>
> https://github.com/search?q=org%3Asystemd+systemd_unit_path&type=Code
>
> Even in these source files they are doing getenv and setenv for
> SYSTEMD_UNIT_PATH. I dont see any conf file using which we can configure the
> environment variable.
>
>
> Regards,
> Raghu.
>
>
> --
> Regards,
>
> Raghavendra. H. R
> (Raghu)
>
> On Mon, Sep 26, 2016 at 1:59 PM, Andrei Borzenkov <arvidjaar at gmail.com>
> wrote:
>>
>> On Mon, Sep 26, 2016 at 10:59 AM, Raghavendra. H. R <raghuhr84 at gmail.com>
>> wrote:
>> > These are instructions which I tried.
>> >
>> > mkdir -p /BingoDast
>> > mount -t nfs -o nolock <ip_address>:/tftpboot/raghu/BingoDast /BingoDast
>> >
>> > export PATH=$PATH:/BingoDast/bin
>> > export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/BingoDast/lib
>> > export SYSTEMD_UNIT_PATH=/BingoDast/units
>> > echo $SYSTEMD_UNIT_PATH
>> > /BingoDast/units
>> >
>> > systemctl start bingod.service
>> > Failed to start bingod.service: Unit bingod.service failed to load: No
>> > such
>> > file or directory.
>> >
>>
>> SYSTEMD_UNIT_PATH has to be set in environment of systemd, not systemctl.
>>
>> > Other options which I tried for setting SYSTEMD_UNIT_PATH are given
>> > below.
>> >
>> > 1. Just gave the environment variable directly on the console
>> >  SYSTEMD_UNIT_PATH=/BingoDast/units
>> >
>> > 2. Gave the environment variable along with DefaultEnvinronment tag
>> >  DefaultEnvironment=SYSTEMD_UNIT_PATH=/BingoDast/units
>> >
>> >
>> > Regards,
>> > Raghu
>> >
>> >
>> > --
>> > Regards,
>> >
>> > Raghavendra. H. R
>> > (Raghu)
>> >
>> > On Mon, Sep 26, 2016 at 1:07 PM, Andrei Borzenkov <arvidjaar at gmail.com>
>> > wrote:
>> >>
>> >> On Mon, Sep 26, 2016 at 10:06 AM, Raghavendra. H. R
>> >> <raghuhr84 at gmail.com>
>> >> wrote:
>> >> > But SYTEMD_UNIT_PATH isn't working. I added my executables path for
>> >> > this
>> >> > env
>> >> > variable but whatever I add isn't reflected for this variable. If I
>> >> > do
>> >> > echo
>> >>
>> >> Repeating this 100 times won't make it more clear. I already asked you
>> >> to paste exact commands and their output that you used to "add your
>> >> path for this env variable".
>> >>
>> >> > of $SYSTEMD_UNIT_PATH. Its all empty. My executables are not able to
>> >> > find
>> >> > the path and it is not running.
>> >> >
>> >> > --
>> >> > Regards,
>> >> >
>> >> > Raghavendra. H. R
>> >> > (Raghu)
>> >> >
>> >> > On Thu, Sep 22, 2016 at 12:26 PM, Andrei Borzenkov
>> >> > <arvidjaar at gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> On Thu, Sep 22, 2016 at 9:18 AM, Raghavendra. H. R
>> >> >> <raghuhr84 at gmail.com>
>> >> >> wrote:
>> >> >> > Thank you for the suggestions.
>> >> >> > But with this suggestion i.e., generator file, I again need to
>> >> >> > add/modify
>> >> >> > some files.
>> >> >> >
>> >> >>
>> >> >> You need to add/modify some files to implement your service anyway.
>> >> >> I
>> >> >> do not see how one more file is a problem so far.
>> >> >>
>> >> >> > All I'm looking into is I mount my binaries and unit files under
>> >> >> > /mnt.
>> >> >> > By
>> >> >> > setting any environment variable like SYSTEMD_UNIT_PATH, systemd
>> >> >> > should
>> >> >> > pick
>> >> >> > the unit files from /mnt and execute my binaries as per the
>> >> >> > instructions
>> >> >> > given in unit file.
>> >> >> >
>> >> >>
>> >> >> Which is exactly what it does. You just need to set variable in
>> >> >> environment of systemd.
>> >> >>
>> >> >> > In normal init.d systems, we have environment variables like PATH
>> >> >> > &
>> >> >> > LD_LIBRARY_PATH.
>> >> >> > No matter where I place my new executable or library, adding new
>> >> >> > path
>> >> >> > into
>> >> >> > these environment variables is enough to execute or link the
>> >> >> > library.
>> >> >> >
>> >> >> > Probably this kind of facility is not available in Systemd init
>> >> >> > systems.
>> >> >> >
>> >> >> > --
>> >> >> > Regards,
>> >> >> >
>> >> >> > Raghavendra. H. R
>> >> >> > (Raghu)
>> >> >> >
>> >> >> > On Wed, Sep 21, 2016 at 10:40 PM, Andrei Borzenkov
>> >> >> > <arvidjaar at gmail.com>
>> >> >> > wrote:
>> >> >> >>
>> >> >> >> 21.09.2016 14:26, Raghavendra. H. R пишет:
>> >> >> >> > Hi,
>> >> >> >> >
>> >> >> >> > I'm newbie with systemd boot system and I need help in
>> >> >> >> > resolving
>> >> >> >> > one
>> >> >> >> > issue.
>> >> >> >> >
>> >> >> >> > I would like to create a service under a customized path
>> >> >> >> > Eg:/mnt
>> >> >> >> > and
>> >> >> >> > systemd should be able to pick my unit file from this.
>> >> >> >> >
>> >> >> >> > I tried by setting *Environment=SYSTEMD_UNIT_PATH=/mnt *from
>> >> >> >> > the
>> >> >> >> > console
>> >> >> >>
>> >> >> >> This should be set in environment of srarted systemd, which in
>> >> >> >> case
>> >> >> >> of
>> >> >> >> systemwide init effectively means either you need to use some
>> >> >> >> wrapper
>> >> >> >> to
>> >> >> >> set it and exec systemd or hack initrd.
>> >> >> >>
>> >> >> >> Also SYSTEMD_UNIT_PATH does not really play nicely with
>> >> >> >> priorities
>> >> >> >> of
>> >> >> >> unit locations (run-time vs. sysadmin vs. shipped).
>> >> >> >>
>> >> >> >> May be it is simpler to install generator that copies your unit
>> >> >> >> definition in standard location. This guarantees it is available
>> >> >> >> before
>> >> >> >> systemd starts.
>> >> >> >
>> >> >> >
>> >> >
>> >> >
>> >
>> >
>
>