2008/7/16 Scott McKellar <[EMAIL PROTECTED]>: > > --- Aaron Joyner <[EMAIL PROTECTED]> wrote: > > <snip -- about a system init script, at least for simple cases> > > Any init script should respect the distinction between OpenSRF (a > generic infrastructure layer) and Evergreen (a specific application > built on top of OpenSRF). > > In principle it should be possible, and preferably easy, to run > OpenSRF for other things besides Evergreen, or even without Evergreen > at all. The separation between those layers is still not completely > clean, but hopefully it will be some day, and in the meanwhile we > should at least maintain the pretense of independence. > > So I would suggest two init scripts. The first one would initialize > OpenSRF. The second one would either call the first one or verify > that OpenSRF was already up and running, and then initialize the > pieces specific to Evergreen. > >
I've been thinking about this a little bit. Given that Evergreen is an OpenSRF application, I'm not sure what it would mean to initialize OpenSRF without initializing the pieces specific to Evergreen; opensrf.xml defines the OpenSRF services that should be started up as part of start_perl / start_c. I suppose you could have a "opensrf" init script that just performed the equivalent of stop/start/restart[router&&perl&&c] (along with dependency checking to ensure postgresql / ejabberd is running), and an "evergreen" init script to stop/start/restart clark-kent.pl / SIP server / assorted other daemons, and make "opensrf" and apache as dependencies. That separation would buy us the ability to restart the daemons without restarting the router/c/perl services. I definitely like the idea of a universal init script. It's going to be most useful for single-server systems, of course; if you've moved Apache and PostgreSQL and ejabber and memcached off to separate servers for scaling purposes, the scripts will obviously have to be tweaked. But at that point you're in a different realm than just "I have a spare server and want to try out Evergreen in the simplest possible fashion" :) -- Dan Scott Laurentian University
