[VDSM] All tests using directio fail on CI

[Nir Soffer]

Hi all,

It seems that the CI setup has changed, and /var/tmp is using now tempfs.

This is not compatible with vdsm tests, assuming that /var/tmp is a real file
system. This is the reason we do not use /tmp.

We have lot of storage tests using directio, and directio cannot work on
tempfs.

Please check the slaves and make sure /var/tmp is using file system supporting
directio.

See example failure bellow.

Nir

----

12:33:20 ======================================================================
12:33:20 ERROR: test_create_fail_creating_lease
(storage_volume_artifacts_test.BlockVolumeArtifactsTests)
12:33:20 ----------------------------------------------------------------------
12:33:20 Traceback (most recent call last):
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/storage_volume_artifacts_test.py",
line 485, in test_create_fail_creating_lease
12:33:20     *BASE_PARAMS[sc.RAW_FORMAT])
12:33:20   File "/usr/lib64/python2.7/unittest/case.py", line 513, in
assertRaises
12:33:20     callableObj(*args, **kwargs)
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/vdsm/storage/sdm/volume_artifacts.py",
line 391, in create
12:33:20     desc, parent)
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/vdsm/storage/sdm/volume_artifacts.py",
line 482, in _create_metadata
12:33:20     sc.LEGAL_VOL)
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/vdsm/storage/volume.py",
line 427, in newMetadata
12:33:20     cls.createMetadata(metaId, meta.legacy_info())
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/vdsm/storage/volume.py",
line 420, in createMetadata
12:33:20     cls._putMetadata(metaId, meta)
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/vdsm/storage/blockVolume.py",
line 242, in _putMetadata
12:33:20     f.write(data)
12:33:20   File
"/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/lib/vdsm/storage/directio.py",
line 161, in write
12:33:20     raise OSError(err, msg)
12:33:20 OSError: [Errno 22] Invalid argument
12:33:20 -------------------- >> begin captured logging << --------------------
12:33:20 2016-09-28 05:32:03,254 DEBUG   [storage.PersistentDict]
(MainThread) Created a persistent dict with VGTagMetadataRW backend
12:33:20 2016-09-28 05:32:03,255 DEBUG   [storage.PersistentDict]
(MainThread) read lines (VGTagMetadataRW)=[]
12:33:20 2016-09-28 05:32:03,255 DEBUG   [storage.PersistentDict]
(MainThread) Empty metadata
12:33:20 2016-09-28 05:32:03,255 DEBUG   [storage.PersistentDict]
(MainThread) Starting transaction
12:33:20 2016-09-28 05:32:03,256 DEBUG   [storage.PersistentDict]
(MainThread) Flushing changes
12:33:20 2016-09-28 05:32:03,256 DEBUG   [storage.PersistentDict]
(MainThread) about to write lines (VGTagMetadataRW)=['CLASS=Data',
'POOL_UUID=52fe3782-ed7a-4d84-be3d-236faebdca2d',
'SDUUID=c088020e-91b2-45e6-85fd-eea3fce58764', 'VERSION=3',
'_SHA_CKSUM=3f26f105271d3f7af6ea7458fb179418e7f9c139']
12:33:20 2016-09-28 05:32:03,257 DEBUG
[storage.Metadata.VGTagMetadataRW] (MainThread) Updating metadata
adding=MDT_POOL_UUID=52fe3782-ed7a-4d84-be3d-236faebdca2d,
MDT__SHA_CKSUM=3f26f105271d3f7af6ea7458fb179418e7f9c139,
MDT_SDUUID=c088020e-91b2-45e6-85fd-eea3fce58764, MDT_CLASS=Data,
MDT_VERSION=3 removing=
12:33:20 2016-09-28 05:32:03,257 DEBUG   [storage.PersistentDict]
(MainThread) Finished transaction
12:33:20 2016-09-28 05:32:03,261 INFO
[storage.BlockVolumeArtifacts] (MainThread) Create placeholder
/var/tmp/tmp3UKYqC/52fe3782-ed7a-4d84-be3d-236faebdca2d/c088020e-91b2-45e6-85fd-eea3fce58764/images/a1e3aa74-2304-4e0c-b8e8-f5b86f8d3ac7
for image's volumes
12:33:20 2016-09-28 05:32:03,264 WARNING
[storage.StorageDomainManifest] (MainThread) Could not find mapping
for lv c088020e-91b2-45e6-85fd-eea3fce58764/3267d54d-c0fa-4fe1-b82b-b88dd5f90de3
12:33:20 2016-09-28 05:32:03,264 DEBUG
[storage.StorageDomainManifest] (MainThread) Found freeSlot 4 in VG
c088020e-91b2-45e6-85fd-eea3fce58764
12:33:20 --------------------- >> end captured logging << ---------------------
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