:: Re: [DNG] What is an init system?
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Lähettäjä: Lorenz
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Vastaanottaja: Steve Litt
Kopio: dng
Aihe: Re: [DNG] What is an init system?
Hi,

Il giorno sab 11 mag 2024 alle ore 02:46 Steve Litt
<slitt@???> ha scritto:
>
>[...]
>
> Sysvinit's PID1 with runit or s6 as a process supervisor for *daemons*,
> not config scripts etc, is a great setup. Just do the following in
> /etc/inittab for a very simple no-runlevel runit:
>
> respawn /usr/bin/runsvdir -P /var/service ........................


In Debian and derivatives it's /etc/service, not /var/service, but
more important,
there is a package that does this setup for you (and it cleans up when removed)
# apt-get install runit-run
it all is needed


>
> The series of dots should actually be at least 400 consecutive dots.
>
> Every daemon run from runit or s6 should be disabled in sysvinit's init
> scripts. I used to know how to disable init scripts in sysvinit, but
> long ago forgot.


update-rc.d script-name disable

Cheers,
Lorenzo
>
> Unlike sysvinit, and like runit, s6 and systemd, OpenRC doesn't require
> the daemons to background themselves. However, in the wild I've noticed
> OpenRC scripts are very long.
>
> Runit and s6 aren't guaranteed to work with daemons that background
> themselves: A kludge is included to try to do this.
>
> Runit is dead-bang simple. S6 trades a little simplicity for quite a
> few more capabilities.
>
> Systemd is a complexificated catastrophe.
>
> HTH,
>
> SteveT
>
> Steve Litt
>
> Autumn 2023 featured book: Rapid Learning for the 21st Century
> http://www.troubleshooters.com/rl21
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