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[Launchpad Bug Tracker <1608934@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package nova - 2:13.1.1-0ubuntu1.1

---------------
nova (2:13.1.1-0ubuntu1.1) xenial; urgency=medium

  * d/p/bug1608934.patch: Cherry pick fix to ignore the resize check if
    the backing file doesn't exist, resolving issues with RAW and LVM
    backends (LP: #1608934).

 -- James Page <james.page@xxxxxxxxxx>  Wed, 05 Oct 2016 16:56:35 +0100

** Changed in: nova (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1608934

Title:
  ephemeral/swap disk creation fails for local storage with image type
  raw/lvm

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive liberty series:
  Fix Committed
Status in Ubuntu Cloud Archive mitaka series:
  Fix Committed
Status in Ubuntu Cloud Archive newton series:
  Fix Released
Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) mitaka series:
  Fix Committed
Status in nova package in Ubuntu:
  Fix Released
Status in nova source package in Xenial:
  Fix Released

Bug description:
  Description
  ===========
  I am currently trying to launch an instance in my mitaka cluster with a flavor with ephemeral and root storage. Whenever i am trying to start the instance i am running into an "DiskNotFound" Error (see trace below). Starting instances without ephemeral works perfectly fine and the root disk is created as expected in /var/lib/nova/instance/$INSTANCEID/disk .

  Steps to reproduce
  ==================
  1. Create a flavor with ephemeral and root storage.
  2. Start an instance with that flavor.

  Expected result
  ===============
  Instance starts and ephemeral disk is created in /var/lib/nova/instances/$INSTANCEID/disk.eph0 or disk.local ? (Not sure where the switchase for the naming is)

  Actual result
  =============
  Instance does not start, ephemeral disk seems to be created at /var/lib/nova/instances/$INSTANCEID/disk.eph0, but nova checks /var/lib/nova/instances/_base/ephemeral_* for disk_size

  TRACE: http://pastebin.com/raw/TwtiNLY2

  Environment
  ===========
  I am running OpenStack mitaka on Ubuntu 16.04 in the latest version with Libvirt + KVM as hypervisor (also latest stable in xenial).

  Config
  ======

  nova.conf:

  ...
  [libvirt]
  images_type = raw
  rbd_secret_uuid = XXX
  virt_type = kvm
  inject_key = true
  snapshot_image_format = raw
  disk_cachemodes = "network=writeback"
  rng_dev_path = /dev/random
  rbd_user = cinder
  ...

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