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[Richard Jones <rjones@xxxxxxxxxx>]

Public bug reported:

https://bugzilla.redhat.com/show_bug.cgi?id=1064947

Using RHELOSP 4.0 GA bits, I'm finding that when I launch the Cirros
0.3.1 image, separate calls to libguestfs within the nova codebase cause
qemu-kvm to be run twice *before* the instance is launched.  This is
suboptimal.

One libguestfs call (file injection) can be disabled by setting
libvirt_inject_partition=-2, but this does not work for the second one
(checking to see if the volume partition/filesystem can be extended).
The codepath for the second call is approximately:

/nova/virt/disk/api.py extend()
/nova/virt/disk/api.py is_image_partitionless()
/nova/virt/disk/vfs/guestfs.py VFSGuestFS.setup()

It would be good if all of this could be done with one libguestfs
instance which could also be disabled in the global nova config.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1279858

Title:
  nova-compute shouldn't spawn two libguestfs appliances every time an
  instance is launched

Status in OpenStack Compute (Nova):
  New

Bug description:
  https://bugzilla.redhat.com/show_bug.cgi?id=1064947

  Using RHELOSP 4.0 GA bits, I'm finding that when I launch the Cirros
  0.3.1 image, separate calls to libguestfs within the nova codebase
  cause qemu-kvm to be run twice *before* the instance is launched.
  This is suboptimal.

  One libguestfs call (file injection) can be disabled by setting
  libvirt_inject_partition=-2, but this does not work for the second one
  (checking to see if the volume partition/filesystem can be extended).
  The codepath for the second call is approximately:

  /nova/virt/disk/api.py extend()
  /nova/virt/disk/api.py is_image_partitionless()
  /nova/virt/disk/vfs/guestfs.py VFSGuestFS.setup()

  It would be good if all of this could be done with one libguestfs
  instance which could also be disabled in the global nova config.

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