On Sun, 26 Jul 2015 12:51:48 +0200 Laurent Bercot <ska-supervis...@skarnet.org> wrote:
> On 26/07/2015 04:35, Steve Litt wrote: > > For all I know it might amelliorate the other problem: insane init > > script complexity, by putting more of the details in the s6 run > > script. > > I'm not sure that would be a good trade-off. An init script is run > once at boot time - or whenever you're changing the machine state - > whereas a ./run script is run every time the service starts, i.e at > least as often. Better move as much complexity as you can *outside* > the run script. > > > > Me, I'd just go with s6 out of the box, but I guess OpenRC is more > > corporationally correct or something like that > > What OpenRC does and s6 alone does not is dependency management, > which is important for heavyset services (including, I guess, desktop > setups). A supervision suite does not handle dependencies between > oneshot services and longrun services, and only implicitly handles > dependencies between longrun services (by letting them restart until > everything works). A real dependency-based systems starts services > in the order they are needed, which is all in all a good thing. s6 + LittKit! > If you want to test a supervision suite + dependency management > system combo doing the right thing, try out anopa, or the publically > available preliminary version of s6-rc. ;) I might do that. Suckless Init plus s6 plus LittKit worked well for me, but LittKit requires *me* to know enough to know what order things should start in, and requires *me* to make up tests to make sure that process are ready, or that tasks have been completed. > > > it can use s6 to do the supervision (and sysvinit to do the PID1, > > you can't make this up, folks). > > OpenRC runs s6-svscan as one of its services, so it can't use it as > init - so it needs to run under another init. > But that's not such a big deal. When switching "init systems", the > rc subsystem is really the difficult part. Once you have a working rc > system, it's not too hard to switch pid 1. Weeeelll, depending on how separable they are. If you swap out systemd's PID1 for Suckless Init, I'll be surprised :-) Hey, seriously, congratulations on s6-rc. If it's what I think it is, it's a sorely needed thing. SteveT Steve Litt July 2015 featured book: Rapid Learning for the 21st Century http://www.troubleshooters.com/rl21
