Le 22/11/2014 21:25, Andrei POPESCU a écrit :
Package: systemd
Version: 215-6
Severity: wishlist
Tags: upstream
Hello,
I think systemd needs a method to deal with multiple providers of the
same service that under usual circumstances (i.e. default configuration)
can't run at the same time, e.g. display managers.
Here's what I came up with, as possible addition to systemd.unit(5)
-----------------------------------------------------------------------
[INSTALL] SECTION OPTIONS
....
AlternativeFor=
The name of a service this unit provides, of which there might be
several providers that can't (under normal circumstances) run at the
same time. At installation time systemctl enable will only create
symlinks from this name to the unit filename, with the same suffix as
this unit.
This option implies a Conflicts= against all other providers of the same
service.
-----------------------------------------------------------------------
I think this would be quite simple to implement and is generic enough to
be used for all kinds of services.
Hey,
See my answer on bug #764607, I think the Alias permits us to achieve
this, in a same way we have alternatives. Then, it requires that the
target Wants=<this alternative> though.
Cheers,
Didier
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