Hi Alison, > -----Original Message----- > From: Alison Chaiken [mailto:ali...@she-devel.com] > Sent: Thursday, January 29, 2015 8:17 PM > To: systemd-devel@lists.freedesktop.org > Cc: Hoyer, Marko (ADITG/SW2) > Subject: Re: Support for staged startup > > Marko Hoyer asks: > > I'd like to realize a staged startup with systemd which is mainly > about: > > - starting up a static tree up to a final service > > - the only job of the final service is to kick off the start of an > > additional sub tree of units This kind of startup could be realized > > simply by adding an additional one shot service which executes: > > systemctl start xxx.target > > Marko, one target can already be specified as "After" another. If > B.target is present in one of the appropriate directories and specifies > > After=A.target > > and all the services of the final sub-tree are symlinked in a > B.target.wants directory, doesn't the behavior you need result? What > is missing? Of course, some of the units linked in B.target.wants > may already be started by the time A.target completes if they are part > of a earlier target or if they are needed by an earlier unit. To > suppress that behavior, you'd have to edit the individual units. > > I don't know of any use case for one unit to start another directly. > Is there one?
1.) Coming up with a small tree first reduces the loading time of the unit set (not so much important in my case) 2.) If you wanna create some dynamics between target A and target B so that depending on the startup situation services are already started before A or in another round they are delayed until A is done, you probably need to disconnect them from the static startup tree and pull them in dynamically at the desired time. > > -- Alison > > -- > Alison Chaiken ali...@she-devel.com > 650-279-5600 > http://{she-devel.com,exerciseforthereader.org} > Never underestimate the cleverness of advertisers, or mischief makers, > or criminals. -- Don Norman Best regards Marko Hoyer Software Group II (ADITG/SW2) Tel. +49 5121 49 6948 _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
