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Re: hotpluggable member of a bridge

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On Thu, Jan 05, 2017 at 10:07:59AM +0100, Nicolas George wrote:
> Le quintidi 15 nivôse, an CCXXV, Stefan Monnier a écrit :
> > Is there something better?  Like a predefined way to just say that when
> > `usb0` appears, it should be added to `br0` (and ideally, this would
> > also `ifup` the `br0` interface if it's not up yet).
> 
> Not with /etc/network/interfaces and ifupdown, but udev can do all that.

I always thought this is a division of labor between udev (generating
a "hotplug event", like "eth0 link went just up" and ifupdown, declaring
what has to happen (cf. the "allow-hotplug" directive).

But I must admit I never looked to deeply into that to be authoritative.
The docs [1] seem to suggest that, though.

Of course, udev would be involved for other network management systems
too, like NM: ideally, udev just dispatches and normalizes kernel events
and delegates to specialized subsystems. In a pinch you can just sneak
a complete shell script in an udev rule (and I'm guilty of having done
such a thing [2]), but doing this as "system architecture" might lead to
madness :-)

[1] https://www.debian.org/doc/manuals/debian-reference/ch05.en.html
[2] Once, for a customer: inserting the right storage medium (with
   the right UUID) triggered a system backup.

regards
- -- t
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hotpluggable member of a bridge Stefan Monnier <monnier@iro.umontreal.ca> - 2017-01-05 04:40 +0100
  Re: hotpluggable member of a bridge Nicolas George <george@nsup.org> - 2017-01-05 10:10 +0100
    Re: hotpluggable member of a bridge <tomas@tuxteam.de> - 2017-01-05 10:30 +0100
      Re: hotpluggable member of a bridge Michael Biebl <biebl@debian.org> - 2017-01-05 16:30 +0100
        Re: hotpluggable member of a bridge Sven Hartge <sven@svenhartge.de> - 2017-01-06 03:00 +0100
          Re: hotpluggable member of a bridge <tomas@tuxteam.de> - 2017-01-06 09:40 +0100
    Re: hotpluggable member of a bridge Stefan Monnier <monnier@iro.umontreal.ca> - 2017-01-05 16:30 +0100
      Re: hotpluggable member of a bridge Nicolas George <george@nsup.org> - 2017-01-05 16:40 +0100
        Re: hotpluggable member of a bridge Stefan Monnier <monnier@IRO.UMontreal.CA> - 2017-01-05 18:30 +0100
        Re: Congratulations Danielle , Your Roof is Covered - FREE!GYfb Danielle Gregory <danielle.k.gregory@gmail.com> - 2017-01-05 22:10 +0100
        Re: Congratulations Aileen , Your Roof is Covered - FREE!PHYi tazzygirl tazzygirl <saratazmtz77@gmail.com> - 2017-01-05 22:10 +0100
        RE: Congratulations Emmanuel , Your Roof is Covered - FREE!44OO Jennyetta Washington <manolofimbres@gmail.com> - 2017-01-05 22:20 +0100
  Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-05 17:10 +0100
    Re: hotpluggable member of a bridge Joshua Schaeffer <jschaeffer0922@gmail.com> - 2017-01-05 17:20 +0100
      Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-05 17:40 +0100
        Re: hotpluggable member of a bridge Joshua Schaeffer <jschaeffer0922@gmail.com> - 2017-01-05 18:10 +0100
        Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-05 22:20 +0100
          Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-05 22:30 +0100
          Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-05 22:40 +0100
            Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-08 16:50 +0100
              Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-08 17:20 +0100
                Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-08 18:00 +0100
    Re: hotpluggable member of a bridge Stefan Monnier <monnier@iro.umontreal.ca> - 2017-01-06 02:20 +0100
      Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-06 12:40 +0100
        Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-06 13:20 +0100
          Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-08 17:00 +0100
            Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-08 17:20 +0100
              Re: hotpluggable member of a bridge Reco <recoverym4n@gmail.com> - 2017-01-08 17:30 +0100
              Re: hotpluggable member of a bridge Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-01-08 17:30 +0100
        Re: hotpluggable member of a bridge Stefan Monnier <monnier@iro.umontreal.ca> - 2017-01-06 22:50 +0100
  Re: hotpluggable member of a bridge Jonathan Dowland <jmtd@debian.org> - 2017-01-06 18:20 +0100

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