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[Christian Berendt <1538041@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When searching for documentations how to configure live migration  when
using Libvirt/KVM with Cinder/Ceph (RBD) you can find a lot of notes
mentioning that the method _check_shared_storage_test_file in
nova/virt/libvirt/driver.py should always return True to disable this
check, because a shared /var/lib/nova/instances is not necessary in this
case.

Does it make sense to make the check for the usage of a shared storage
for /var/lib/nova/instances configurable?

Or to not check for the existence of a shared /var/lib/nova/instances if
images_type == rbd?

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1538041

Title:
  Make use of _check_shared_storage_test_file configurable

Status in OpenStack Compute (nova):
  New

Bug description:
  When searching for documentations how to configure live migration
  when using Libvirt/KVM with Cinder/Ceph (RBD) you can find a lot of
  notes mentioning that the method _check_shared_storage_test_file in
  nova/virt/libvirt/driver.py should always return True to disable this
  check, because a shared /var/lib/nova/instances is not necessary in
  this case.

  Does it make sense to make the check for the usage of a shared storage
  for /var/lib/nova/instances configurable?

  Or to not check for the existence of a shared /var/lib/nova/instances
  if images_type == rbd?

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