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[Launchpad Bug Tracker <1661292@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1661292

Title:
  VFS: Cannot open root device "LABEL=cloudimg-rootfs" or unknown-
  block(0,0): error -6

Status in OpenStack Compute (nova):
  Expired
Status in linux package in Ubuntu:
  Expired

Bug description:
  Description
  ===========
  An kvm instance failed to boot with a kernel panic after hitting this error:

  VFS: Cannot open root device "LABEL=cloudimg-rootfs" or unknown-
  block(0,0): error -6

  Steps to reproduce
  ==================
  This doesn't reproduce reliably, it seems to be a race condition.

  * I started an instance through the API.  It had not attached storage,
  and was attached to a single network. It used an Ubuntu Xenial cloud
  image which booted successfully on a different instance on a different
  compute node.

  Expected Result
  ===============
  * I expected the instance to boot successfully

  Actual Result
  =============
  * The instance failed to boot with a kernel panic:
  http://pastebin.ubuntu.com/23911493/

  * I used virsh destroy to stop that instance, then started it again
  through the API, and it worked.

  Environment
  ===========
  xenial/newtown/kvm/openvswitch, no attached storage.

  ii  nova-common                          2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute - common files
  ii  nova-compute                         2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute - compute node base
  ii  nova-compute-kvm                     2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute - compute node (KVM)
  ii  nova-compute-libvirt                 2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute - compute node libvirt support
  ii  python-nova                          2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute Python libraries
  ii  python-novaclient                    2:6.0.0-0ubuntu1~cloud0             all          client library for OpenStack Compute API - Python 2.7
  ii  libvirt-bin                          1.3.1-1ubuntu10.6                   amd64        programs for the libvirt library
  ii  libvirt0:amd64                       1.3.1-1ubuntu10.6                   amd64        library for interfacing with different virtualization systems
  ii  nova-compute-libvirt                 2:14.0.1-0ubuntu1~cloud0            all          OpenStack Compute - compute node libvirt support
  ii  python-libvirt                       1.3.1-1ubuntu1                      amd64        libvirt Python bindings

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