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[Launchpad Bug Tracker <1485752@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-initramfs-tools - 0.27ubuntu1.3

---------------
cloud-initramfs-tools (0.27ubuntu1.3) xenial; urgency=medium

  * sync with upstream at 0.32ubuntu1 (revno 129)
    * overlayroot: fix overlayroot=crypt with newer initramfs-tools
      (LP: #1634310)
    * overlayroot: support random seed from systemd systemd-random-seed.service
    * cloud-initramfs-dyn-netconf: Further adjustments to support
      IPV6 and the new DEVICE6 and net6-DEVICE.conf files.  (LP: #1621615)
    * overlayroot: support 'overlay' filesystem explicitly rather than
      relying on ubuntu specific kernel module 'overlayfs'.  (LP: #1493188)
    * overlayroot: write debug to /run/initramfs not /dev/.initramfs but
      support writing to /dev/.initramfs if that is all there is. (LP: #1485752)
    * overlayroot: fix overlayroot if recurse=0 was not provided.
      This fuctionality was lost since workdir support was added. (LP: #1619459)
    * whitespace cleanup.

 -- Scott Moser <smoser@xxxxxxxxxx>  Mon, 28 Nov 2016 20:12:51 -0500

** Changed in: cloud-initramfs-tools (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1485752

Title:
  drop oneiric /run compatibility link

Status in cloud-initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in cloud-initramfs-tools source package in Xenial:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  overlayfs writes some log information to the tmpfs that was intended
  to be then viewable after the pivot_root to the real root.
  The path used was /dev/.initramfs.  Due to changes in initramfs-tools
  under this bug, that path was no longer supported.  And the logging
  was busted.

  There was no functional problem with this except in the crypt use
  case as described in bug 1634310.

  [Test Case]
  1.) Start an instance of a cloud image.

  2.) Enable proposed and install overlayroot to show fix.
      $ rel=$(lsb_release -sc)
      $ echo "deb http://archive.ubuntu.com/ubuntu $rel-proposed main" |
      $ sudo tee /etc/apt/sources.list.d/proposed.list
      $ sudo apt update -qy && sudo apt install -qy overlayroot </dev/null
      $ dpkg-query --show overlayroot
      overlayroot 0.27ubuntu1.3

  3.) Enable overlayroot and reboot
      $ echo "overlayroot=tmpfs:debug=1" | sudo tee /etc/overlayroot.local.conf
      $ sudo reboot

  4.) log back in and look around.
     a.) check that 'overlayroot' is in /proc/mounts
         $ awk '$1 == "overlayroot" { print $0 }' /proc/mounts
         overlayroot / overlay rw,relatime,lowerdir=/media/root-ro,upperdir=/media/root-rw/overlay,workdir=/media/root-rw/overlay-workdir/_ 0 0

     b.) check /run/initramfs/overlayroot.log exists.

  [Regression Potential]
  A regression here is somewhat unlikely.  Most likely would be inadvertant failure.
  As you can see in the fix, the code looks for a dir /run/initramfs /dev/.initramfs
  and picks the first one that exists.  If neither existed for some reason,
  then debug would remain busted.

  [Other Info]
  The full overlayroot/init-bottom/overlayroot can be seen at [1].  The
  specific change that fixed the issue is in revision 112 at [2].

  [1] http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/view/head:/overlayroot/scripts/init-bottom/overlayroot
  [2] http://bazaar.launchpad.net/~cloud-initramfs-tools/cloud-initramfs-tools/trunk/revision/112

  === End SRU Template ===

  Drop: Maintain compatibility with pre- /run configurations -- this was
  for compatibility with oneiric which is now long gone.

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