[systemd-devel] suggestion: auto reload as the default to help packagers?

[Michael Chapman]

On Fri, 31 May 2019, Reindl Harald wrote:
> Am 31.05.19 um 12:31 schrieb Michael Chapman:
> > For RPM on Fedora, the systemd package has %transfiletriggerin and 
> > %transfiletriggerun scriptlets that run automatically at the end of the 
> > RPM transaction if units were installed or removed. This is the cleanest 
> > approach since it means all changes from all updated packages are applied 
> > at once.
> 
> sadly that's all theory given that all services in Fedora are
> automatically hard restartet when packages are updated and "at the end"
> is too late when the service got restarted with the old unit but new binary

I actually got it slightly wrong: %transfiletriggerin and 
%transfiletriggerun occur in the _middle_ of the transaction, in between 
installation of new packages (or new versions of packages) and removal of 
old packages (or old versions of packages). While %transfiletriggerin 
does perform a daemon-reload, %transfiletriggerun simply stores a 
flag that's picked up by a separate %filetriggerpostun scriptlet. That 
reloads systemd.

So overall there shouldn't be any issues there. I don't recall seeing the 
errors you're talking about.