[Bug 1075256] Re: allow custom method in "/etc/network/interfaces"

[Stéphane Graber]

** Changed in: ifupdown (Ubuntu)
       Status: New => Triaged

** Changed in: ifupdown (Ubuntu)
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/1075256

Title:
  allow custom method in "/etc/network/interfaces"

Status in “ifupdown” package in Ubuntu:
  Triaged

Bug description:
  we have several custom networking scripts, and find it would be
  easiest to handle them with a custom "method" in
  "/etc/network/interfaces" .  we can't just add scripts to if-up.d,
  because we need strong ordering of command execution.  examples would
  be adding macvlans, and ip tunnels.   for example, we need pre-up in
  "/etc/network/interfaces" to run before ANY other scripts , because we
  do an ip link creation there.  there are builtin "methods" which cover
  some of the functionality we want, but clearly this doesn't scale like
  a plugin based architecture would.   unfortunately, there is no easy
  way to plug in a custom method for handling these networking stanzas.
  thus, we have to write stuff like this for each interface.

  auto vmac-ha
  iface vmac-ha inet manual
          [ NORMAL ENTRIES ] 
          pre-up          my-vmac-helper
          up              my-vmac-helper
          down            my-vmac-helper
          post-down       my-vmac-helper

  it would be MUCH easier to have something like this

  auto vmac-ha
  iface vmac-ha inet custom my-vmac-helper
          [ NORMAL ENTRIES ]

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