Public bug reported:

The check job gate-glance-python27 failed on my patch
https://review.openstack.org/#/c/197916/

I added debug traces and it looks like the OpenStack infra uses a ext4
partition mounted with noatime, whereas the xattr image cache driver
explicitly requires atime.

Debug trace: http://logs.openstack.org/16/197916/6/check/gate-glance-
python27/16760bf/testr_results.html.gz

glance.tests.unit.test_image_cache.TestImageCacheXattr.test_caching_iterator_falloffend
Traceback (most recent call last):
  File "glance/tests/unit/test_image_cache.py", line 411, in 
test_caching_iterator_falloffend
    self.assertFalse(os.path.exists(incomplete_file_path), debug_info)
  File 
"/home/jenkins/workspace/gate-glance-python27/.tox/py27/local/lib/python2.7/site-packages/unittest2/case.py",
 line 696, in assertFalse
    raise self.failureException(msg)
AssertionError: True is not false : /tmp/tmp.NOhmw2VXFN/tmpjnooYj

Content of the image cache:

/tmp/tmp.NOhmw2VXFN/tmpjnooYj/queue
/tmp/tmp.NOhmw2VXFN/tmpjnooYj/incomplete
/tmp/tmp.NOhmw2VXFN/tmpjnooYj/incomplete/1
/tmp/tmp.NOhmw2VXFN/tmpjnooYj/invalid

Filesystem of the image cache (/tmp):

Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/xvda1      41147472 11923388  27320644  31% /

Filesystem mounted with:

/dev/xvda1 on / type ext4 (rw,noatime,errors=remount-ro,barrier=0)

Notice "noatime" in the mount options of /dev/xvda1.

The test
glance.tests.unit.test_image_cache.TestImageCacheXattr.test_caching_iterator_falloffend
pass on my Fedora 22.  On Fedora 22, the image cache is created on /tmp
which mounted as tmpfs.

** Affects: glance
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1471243

Title:
  Test on the xattr image cache fails because of noatime

Status in OpenStack Image Registry and Delivery Service (Glance):
  New

Bug description:
  The check job gate-glance-python27 failed on my patch
  https://review.openstack.org/#/c/197916/

  I added debug traces and it looks like the OpenStack infra uses a ext4
  partition mounted with noatime, whereas the xattr image cache driver
  explicitly requires atime.

  Debug trace: http://logs.openstack.org/16/197916/6/check/gate-glance-
  python27/16760bf/testr_results.html.gz

  
glance.tests.unit.test_image_cache.TestImageCacheXattr.test_caching_iterator_falloffend
  Traceback (most recent call last):
    File "glance/tests/unit/test_image_cache.py", line 411, in 
test_caching_iterator_falloffend
      self.assertFalse(os.path.exists(incomplete_file_path), debug_info)
    File 
"/home/jenkins/workspace/gate-glance-python27/.tox/py27/local/lib/python2.7/site-packages/unittest2/case.py",
 line 696, in assertFalse
      raise self.failureException(msg)
  AssertionError: True is not false : /tmp/tmp.NOhmw2VXFN/tmpjnooYj

  Content of the image cache:

  /tmp/tmp.NOhmw2VXFN/tmpjnooYj/queue
  /tmp/tmp.NOhmw2VXFN/tmpjnooYj/incomplete
  /tmp/tmp.NOhmw2VXFN/tmpjnooYj/incomplete/1
  /tmp/tmp.NOhmw2VXFN/tmpjnooYj/invalid

  Filesystem of the image cache (/tmp):

  Filesystem     1K-blocks     Used Available Use% Mounted on
  /dev/xvda1      41147472 11923388  27320644  31% /

  Filesystem mounted with:

  /dev/xvda1 on / type ext4 (rw,noatime,errors=remount-ro,barrier=0)

  Notice "noatime" in the mount options of /dev/xvda1.

  The test
  
glance.tests.unit.test_image_cache.TestImageCacheXattr.test_caching_iterator_falloffend
  pass on my Fedora 22.  On Fedora 22, the image cache is created on
  /tmp which mounted as tmpfs.

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