[Bug 251164] Re: boot impossible due to missing initramfs failure hook / event driven initramfs

[ceg]

Looking at the timouts suggested in Comment #15, I think they may actually be realizable with modular scripts. A base rootdelay script, and separate mdadm and cryptsetup sripts (that get called by their udev rules) can halt/extend the regular rootdelay (exported variable? named pipe?), if waiting for user input or a new level of raid degrading timeout. (As pipes block, reading from pipes may do good for event based processing.)

Phillip, your idea of handling udev events by modular event handlers (that may again trigger udev events, if I interpret you correctly) may also be what appears in part of the OpenRC discussion.
On init in Debian http://lists.debian.org/debian-devel/2012/03/msg00452.html
RFC: OpenRC as Init http://lists.debian.org/debian-devel/2012/04/msg00547.html

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https://bugs.launchpad.net/bugs/251164

Title:
  boot impossible due to missing initramfs failure hook / event driven
  initramfs

Status in “cryptsetup” package in Ubuntu:
  Triaged
Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  the cryptsetup package needs proper integration into the initramfs
  failure hooks

  The system must not assume a particular layered setup or sequence of
  appearance of (hotplug/udev/crypt/md/degraded-md/lvm) devices.

  It must be able to boot with any possible combination raid, lvm, crypt
  combination that the debian-installer can produce.

  
  Description of solution in comment #15

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