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[Alexey Stupnikov <2039972@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

nova-ceph-multistore failed for one of my patches because
TestVolumeBootPattern.test_volume_boot_pattern failed to find test file.

test_volume_boot_pattern() [1] has quite simple logic:

- Create in Cinder some bootable volume importing a Glance image
- Boot an instance from the bootable volume
- Write content to the volume
- Delete an instance and Boot a new instance from the volume
- Check written content in the instance # FAILED
- Create a volume snapshot while the instance is running
- Boot an additional instance from the new snapshot based volume
- Check written content in the instance booted from snapshot

For some reason test file in /tmp folder was missing after new instance
was created with this volume attached. I have no idea what may cause it
other than some cleanup operation against /tmp folder on OS level.
Reporting this bug just in case, maybe there is some obvious problem.

Logs:
https://zuul.opendev.org/t/openstack/build/42a6c06ff5f545a5bb610d7c0d454032/logs

[1]
https://github.com/openstack/tempest/blob/d1742bad94e94ebabe875ed24415d1ff510a5ae7/tempest/scenario/test_volume_boot_pattern.py#L58

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: testing

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https://bugs.launchpad.net/bugs/2039972

Title:
  [CI] TestVolumeBootPattern.test_volume_boot_pattern failed because
  test file wasn't found

Status in OpenStack Compute (nova):
  New

Bug description:
  nova-ceph-multistore failed for one of my patches because
  TestVolumeBootPattern.test_volume_boot_pattern failed to find test
  file.

  test_volume_boot_pattern() [1] has quite simple logic:

  - Create in Cinder some bootable volume importing a Glance image
  - Boot an instance from the bootable volume
  - Write content to the volume
  - Delete an instance and Boot a new instance from the volume
  - Check written content in the instance # FAILED
  - Create a volume snapshot while the instance is running
  - Boot an additional instance from the new snapshot based volume
  - Check written content in the instance booted from snapshot

  For some reason test file in /tmp folder was missing after new
  instance was created with this volume attached. I have no idea what
  may cause it other than some cleanup operation against /tmp folder on
  OS level. Reporting this bug just in case, maybe there is some obvious
  problem.

  Logs:
  https://zuul.opendev.org/t/openstack/build/42a6c06ff5f545a5bb610d7c0d454032/logs

  [1]
  https://github.com/openstack/tempest/blob/d1742bad94e94ebabe875ed24415d1ff510a5ae7/tempest/scenario/test_volume_boot_pattern.py#L58

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