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[Martin Pitt <martin.pitt@xxxxxxxxxx>]

This reminds me of bug 1351295. For the main "init" initramfs script and
local partitions there is code to get along with absolute symlinks. I
don't see any readlink in the nfs script, but I figure this is a related
problem. I see the Debian package has a fix for this:
http://anonscm.debian.org/cgit/kernel/initramfs-
tools.git/commit/scripts/nfs?id=7bc24f829f

Would you mind testing this? I. e. please put the attached "nfs" script
into /usr/share/initramfs-tools/scripts/, revert /sbin/init to be an
absolute link to /lib/systemd/systemd again, run "sudo update-initramfs
-u", and check if booting now works?

Thanks!

** Attachment added: "fixed nfs script"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1439955/+attachment/4369354/+files/nfs

** Package changed: systemd (Ubuntu) => initramfs-tools (Ubuntu)

** Summary changed:

- systemd breaks nfs root on vivid
+ nfs root script breaks with absolute /sbin/init symlinks

** Bug watch added: Debian Bug tracker #750360
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=750360

** Also affects: initramfs-tools (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=750360
   Importance: Unknown
       Status: Unknown

** Changed in: initramfs-tools (Ubuntu)
       Status: New => In Progress

** Changed in: initramfs-tools (Ubuntu)
     Assignee: (unassigned) => Martin Pitt (pitti)

** Changed in: initramfs-tools (Ubuntu)
   Importance: Undecided => High

** Tags added: systemd-boot

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https://bugs.launchpad.net/bugs/1439955

Title:
  nfs root script breaks with absolute /sbin/init symlinks

Status in initramfs-tools package in Ubuntu:
  In Progress
Status in initramfs-tools package in Debian:
  Unknown

Bug description:
  The initramfs boot script try to mount the root filesystem into /root
  and look for a /sbin/init file inside that folder. systemd installs
  /sbin/init as a link to /lib/systemd/systemd, which the initramfs
  scripts can't find (because the link is an absolute path and the root
  is mounted under /root).

  Making that link a relative path fixes the problem (i.e. making it
  ../lib/systemd/systemd).

  Please, see /usr/share/initramfs-tools/scripts/nfs for the affected
  script.

  
  I believe this should be fixed before the release of 15.04, as it breaks all nfs root installs.

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