[systemd-devel] Cleaning up transient scopes

[Alexander Larsson]

On tis, 2015-05-19 at 19:00 +0200, Lennart Poettering wrote:
> On Thu, 05.03.15 10:12, Alexander Larsson (alexl at redhat.com) wrote:
> 
> > See, even when the sleep command died the scope still exists, and is
> > even ACTIVE.
> 
> This appears to work fine here on git. There were some fixes to
> systemd-run made, but it would be cool if you could verify that this
> works for you.

I don't have a master build here, but its still an issue on F22 at least
(although that is a bit older). The only fix i saw on master was a race
condition though, but I can easily reproduce this with "slow" services.
I.E:

$ systemd-run  --user --scope sleep 30 &
[1] 3998
Running as unit run-3998.scope.
$ systemctl status --user run-3998.scope
● run-3998.scope - /usr/bin/sleep 30
   Loaded: loaded (/run/user/1000/systemd/user/run-3998.scope; static;
vendor preset: enabled)
  Drop-In: /run/user/1000/systemd/user/run-3998.scope.d
           └─50-Description.conf
   Active: active (running) since Mon 2015-06-01 12:44:14 CEST; 8s ago
   CGroup: /user.slice/user-1000.slice/user at 1000.service/run-3998.scope
           └─3998 /usr/bin/sleep 30

Jun 01 12:44:14 nano systemd[1631]: Started /usr/bin/sleep 30.
Jun 01 12:44:14 nano systemd[1631]: Starting /usr/bin/sleep 30.
[alex at nano ~]$ sleep 30
[1]+  Done                    systemd-run --user --scope sleep 30
[alex at nano ~]$ systemctl status --user run-3998.scope
● run-3998.scope - /usr/bin/sleep 30
   Loaded: loaded (/run/user/1000/systemd/user/run-3998.scope; static;
vendor preset: enabled)
  Drop-In: /run/user/1000/systemd/user/run-3998.scope.d
           └─50-Description.conf
   Active: active (running) since Mon 2015-06-01 12:44:14 CEST; 45s ago

Jun 01 12:44:14 nano systemd[1631]: Started /usr/bin/sleep 30.
Jun 01 12:44:14 nano systemd[1631]: Starting /usr/bin/sleep 30.


I.e. the scope is still there and is "active" even though it knows the
one pid, main pid in it doesn't live anymore.

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 Alexander Larsson                                            Red Hat, Inc 
       alexl at redhat.com            alexander.larsson at gmail.com 
He's a fast talking overambitious dwarf on the run. She's a strong-willed 
cigar-chomping vampire with an evil twin sister. They fight crime!