Tested failing because of missing loop devices

[Nir Soffer]

On Wed, Dec 23, 2015 at 5:11 PM, Eyal Edri <eedri at redhat.com> wrote:
> I'm guessing this will e solved by running it on lago?
> Isn't that what yaniv is working on now?
>
> or these are unit tests and not functional?
>
> e.
>
> On Wed, Dec 23, 2015 at 4:48 PM, Dan Kenigsberg <danken at redhat.com> wrote:
>>
>> On Wed, Dec 23, 2015 at 03:21:31AM +0200, Nir Soffer wrote:
>> > Hi all,
>> >
>> > We see too many failures of tests using loop devices. Is it possible
>> > that we run tests
>> > concurrently on the same slave, using all the available loop devices, or
>> > maybe
>> > creating races between different tests?
>> >
>> > It seems that we need new decorator for disabling tests on the CI
>> > slaves, since this
>> > environment is too fragile.
>> >
>> > Here are some failures:
>> >
>> > 01:10:33
>> > ======================================================================
>> > 01:10:33 ERROR: testLoopMount (mountTests.MountTests)
>> > 01:10:33
>> > ----------------------------------------------------------------------
>> > 01:10:33 Traceback (most recent call last):
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/tests/mountTests.py",
>> > line 128, in testLoopMount
>> > 01:10:33     m.mount(mntOpts="loop")
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/vdsm/storage/mount.py",
>> > line 225, in mount
>> > 01:10:33     return self._runcmd(cmd, timeout)
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/vdsm/storage/mount.py",
>> > line 241, in _runcmd
>> > 01:10:33     raise MountError(rc, ";".join((out, err)))
>> > 01:10:33 MountError: (32, ';mount: /tmp/tmpZuJRNk: failed to setup
>> > loop device: No such file or directory\n')
>> > 01:10:33 -------------------- >> begin captured logging <<
>> > --------------------
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: /usr/bin/taskset --cpu-list 0-1
>> > /sbin/mkfs.ext2 -F /tmp/tmpZuJRNk (cwd None)
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: SUCCESS: <err> = 'mke2fs 1.42.13
>> > (17-May-2015)\n'; <rc> = 0
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: /usr/bin/taskset --cpu-list 0-1
>> > /usr/bin/mount -o loop /tmp/tmpZuJRNk /var/tmp/tmpJO52Xj (cwd None)
>> > 01:10:33 --------------------- >> end captured logging <<
>> > ---------------------
>> > 01:10:33
>> > 01:10:33
>> > ======================================================================
>> > 01:10:33 ERROR: testSymlinkMount (mountTests.MountTests)
>> > 01:10:33
>> > ----------------------------------------------------------------------
>> > 01:10:33 Traceback (most recent call last):
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/tests/mountTests.py",
>> > line 150, in testSymlinkMount
>> > 01:10:33     m.mount(mntOpts="loop")
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/vdsm/storage/mount.py",
>> > line 225, in mount
>> > 01:10:33     return self._runcmd(cmd, timeout)
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/vdsm/storage/mount.py",
>> > line 241, in _runcmd
>> > 01:10:33     raise MountError(rc, ";".join((out, err)))
>> > 01:10:33 MountError: (32, ';mount: /var/tmp/tmp1UQFPz/backing.img:
>> > failed to setup loop device: No such file or directory\n')
>> > 01:10:33 -------------------- >> begin captured logging <<
>> > --------------------
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: /usr/bin/taskset --cpu-list 0-1
>> > /sbin/mkfs.ext2 -F /var/tmp/tmp1UQFPz/backing.img (cwd None)
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: SUCCESS: <err> = 'mke2fs 1.42.13
>> > (17-May-2015)\n'; <rc> = 0
>> > 01:10:33 Storage.Misc.excCmd: DEBUG: /usr/bin/taskset --cpu-list 0-1
>> > /usr/bin/mount -o loop /var/tmp/tmp1UQFPz/link_to_image
>> > /var/tmp/tmp1UQFPz/mountpoint (cwd None)
>> > 01:10:33 --------------------- >> end captured logging <<
>> > ---------------------
>> > 01:10:33
>> > 01:10:33
>> > ======================================================================
>> > 01:10:33 ERROR: test_getDevicePartedInfo
>> > (parted_utils_tests.PartedUtilsTests)
>> > 01:10:33
>> > ----------------------------------------------------------------------
>> > 01:10:33 Traceback (most recent call last):
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/tests/testValidation.py",
>> > line 97, in wrapper
>> > 01:10:33     return f(*args, **kwargs)
>> > 01:10:33   File
>> >
>> > "/home/jenkins/workspace/vdsm_master_check-patch-fc23-x86_64/vdsm/tests/parted_utils_tests.py",
>> > line 61, in setUp
>> > 01:10:33     self.assertEquals(rc, 0)
>> > 01:10:33 AssertionError: 1 != 0
>> > 01:10:33 -------------------- >> begin captured logging <<
>> > --------------------
>> > 01:10:33 root: DEBUG: /usr/bin/taskset --cpu-list 0-1 dd if=/dev/zero
>> > of=/tmp/tmpasV8TD bs=100M count=1 (cwd None)
>> > 01:10:33 root: DEBUG: SUCCESS: <err> = '1+0 records in\n1+0 records
>> > out\n104857600 bytes (105 MB) copied, 0.368498 s, 285 MB/s\n'; <rc> =
>> > 0
>> > 01:10:33 root: DEBUG: /usr/bin/taskset --cpu-list 0-1 losetup -f
>> > --show /tmp/tmpasV8TD (cwd None)
>> > 01:10:33 root: DEBUG: FAILED: <err> = 'losetup: /tmp/tmpasV8TD: failed
>> > to set up loop device: No such file or directory\n'; <rc> = 1
>> > 01:10:33 --------------------- >> end captured logging <<
>> > ---------------------
>> >
>>
>> I've reluctantly marked another test as broken in
>> https://gerrit.ovirt.org/50484
>> due to a similar problem.
>> Your idea of @brokentest_ci decorator is slightly less bad - at least we
>> do not ignore errors in this test when run on non-ci platforms.

Sadly the correct name should be @brokenci :-)

Nir