[Bug 1608934] Re: ephemeral/swap disk creation fails for local storage with image type raw/lvm

[Martin Pitt]

Hello Jan, or anyone else affected,

Accepted nova into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/nova/2:13.1.1-0ubuntu1.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

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

** Tags added: verification-needed

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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:
  In Progress
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 Committed

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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