[Bug 1126560] Re: /etc/networking/* are executed multiple times

[Stéphane Graber]

Ok, with that config you should have all the scripts run twice in theory, once for the loopback device and once for eth0.
Not sure why you're seeing one running 3 times though.

All the .d scripts are run once per interface, so it's perfectly normal
for them to be called multiple times. Interfaces are brought up as they
show up from the kernel, so they can indeed be brought up in parallel.
Scripts should expect that and deal with that accordingly. If they
don't, a bug against the package providing the script is the way
forward.

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https://bugs.launchpad.net/bugs/1126560

Title:
  /etc/networking/* are executed multiple times

Status in “ifupdown” package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu 13.04 dev with ifupdown 0.7.5ubuntu2. I have noticed
  that on booting my system in /etc/networking the scripts in if-pre-
  up.d and if-up.d are executed multiple times. On my observations I
  have noticed that they can even be executed parallelized. I have
  logged what happened on a boot:

  1. The content of /etc/networking/if-pre-up.d is executed parallelized 2 times.
  2. After they have finished the content of /etc/networking/if-up.d is excuted.
  3. Then the content of /etc/networking/if-pre-up.d is excuted again.
  4. At last the content of /etc/networking/if-up.d is executed again too.

  As a summary: The content of /etc/networking/if-pre-up.d was executed
  3times and /etc/networking/if-up.d 2 times.

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