[systemd-devel] how to properly control the daemons or run advanced cmds

[Lennart Poettering]

On Tue, 02.12.14 10:30, Flavio Leitner (fbl at redhat.com) wrote:

> Sort of.  This special restart is only need on few cases when
> hot-upgrading, otherwise users expect full restart which is already
> accomplished by the current service unit.
> 
> It seems to me that the solution is a mix of making two units and wrap
> the special upgrade in a separate script which would manage each
> daemon properly. Does that make sense to you?
> 
> I am worried with the usability too, because I don't want the admin to
> worry about each daemon.  I would rather have a single unit
> controlling both at the same time.  It might be possible to have this
> 'front-end' unit to be one of the daemons and make it work as you
> described in (b) using Requires=.
> 
> I will do some experiments later on.

You can also create a "target" unit that combines both units into
one. Call it "openvswitch.target" make it pull in your two service
units, and then add PartOf= dependencies from them back to the
target. 

Lennart

-- 
Lennart Poettering, Red Hat