[systemd-devel] How to exclusively toggle between two systemd instances of a single daemon?

[Mantas Mikulėnas]

On Wed, Oct 8, 2014 at 4:39 PM, Zbigniew Jędrzejewski-Szmek <
zbyszek at in.waw.pl> wrote:

> On Wed, Oct 08, 2014 at 06:30:51AM -0700, terrygalant.lists at fastest.cc
> wrote:
> > Hi
> >
> > I have 2 installed instances of a single daemon.
> >
> > 1 is from distro-installed packages, installed into standard default OS
> locations with unit files in /usr/lib/systemd/system/.
> >
> > The other is installed under /opt, with unit files currently in
> /opt/mydaemon/systemd/system/, which can be (un)symlinked as needed into
> /etc/systemd/system/multi-user.target.wants/ to disable or enable.
> >
> > I want to be able to occasionally toggle between use of the 2.
> >
> > Is the right systemd way to do manage this toggle to just name the 2
> instances' unit files differently, put a Conflicts= in each for the other,
> and just use 'enable' for whichever I want active?
>
> That would work.
>
> You can also make a symlink from /etc/systemd/system/xxx.service to
> either of the two files and manage it by hand, calling systemctl
> daemon-reload afterwards. I think this should work.
>

Hmm, isn't this basically the same as adding identical [Install] Alias=
entries, and using `systemctl enable -f` to manage them?

-- 
Mantas Mikulėnas <grawity at gmail.com>
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