Failure confirm on Fedora 20; even without the mysql DB setup:

 [fedora@jay-fedora20-test-ironicbug ironic]$ tox
py27 develop-inst-noop: /home/fedora/ironic
py27 runtests: PYTHONHASHSEED='3906926702'
py27 runtests: commands[0] | bash -c TESTS_DIR=./ironic/tests/ python setup.py testr --slowest --testr-args=''
running testr
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} OS_TEST_TIMEOUT=60 ${PYTHON:-python} -m subunit.run discover -t ./ ${TESTS_DIR:-./ironic/tests/} --list
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} OS_TEST_TIMEOUT=60 ${PYTHON:-python} -m subunit.run discover -t ./ ${TESTS_DIR:-./ironic/tests/}  --load-list /tmp/tmpv2RHCN
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} OS_TEST_TIMEOUT=60 ${PYTHON:-python} -m subunit.run discover -t ./ ${TESTS_DIR:-./ironic/tests/}  --load-list /tmp/tmpoyfKzR
======================================================================
FAIL: ironic.tests.drivers.test_deploy_utils.RealFilePartitioningTestCase.test_different_sizes
tags: worker-0
----------------------------------------------------------------------
Traceback (most recent call last):
_StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/mock.py", line 1201, in patched
    return func(*args, **keywargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 761, in test_different_sizes
    image_path='path', **kwargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 751, in _run_without_root
    return func(*args, **kwargs)
  File "ironic/drivers/modules/deploy_utils.py", line 312, in work_on_disk
    commit=commit)
  File "ironic/drivers/modules/deploy_utils.py", line 135, in make_partitions
    dp.commit()
  File "ironic/common/disk_partitioner.py", line 161, in commit
    timer.start(interval=interval).wait()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/event.py", line 121, in wait
    return hubs.get_hub().switch()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch
    return self.greenlet.switch()
  File "ironic/openstack/common/loopingcall.py", line 81, in _inner
    self.f(*self.args, **self.kw)
  File "ironic/common/disk_partitioner.py", line 122, in _wait_for_disk_to_become_available
    check_exit_code=[0, 1], run_as_root=True)
  File "ironic/tests/drivers/test_deploy_utils.py", line 748, in fake_execute
    return real_execute(*cmd, **kwargs)
  File "ironic/common/utils.py", line 82, in execute
    result = processutils.execute(*cmd, **kwargs)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/oslo_concurrency/processutils.py", line 218, in execute
    env=env_variables)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/green/subprocess.py", line 47, in __init__
    subprocess_orig.Popen.__init__(self, args, 0, *argss, **kwds)
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Traceback (most recent call last):
_StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/mock.py", line 1201, in patched
    return func(*args, **keywargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 761, in test_different_sizes
    image_path='path', **kwargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 751, in _run_without_root
    return func(*args, **kwargs)
  File "ironic/drivers/modules/deploy_utils.py", line 312, in work_on_disk
    commit=commit)
  File "ironic/drivers/modules/deploy_utils.py", line 135, in make_partitions
    dp.commit()
  File "ironic/common/disk_partitioner.py", line 161, in commit
    timer.start(interval=interval).wait()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/event.py", line 121, in wait
    return hubs.get_hub().switch()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch
    return self.greenlet.switch()
  File "ironic/openstack/common/loopingcall.py", line 81, in _inner
    self.f(*self.args, **self.kw)
  File "ironic/common/disk_partitioner.py", line 122, in _wait_for_disk_to_become_available
    check_exit_code=[0, 1], run_as_root=True)
  File "ironic/tests/drivers/test_deploy_utils.py", line 748, in fake_execute
    return real_execute(*cmd, **kwargs)
  File "ironic/common/utils.py", line 82, in execute
    result = processutils.execute(*cmd, **kwargs)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/oslo_concurrency/processutils.py", line 218, in execute
    env=env_variables)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/green/subprocess.py", line 47, in __init__
    subprocess_orig.Popen.__init__(self, args, 0, *argss, **kwds)
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
======================================================================
FAIL: ironic.tests.drivers.test_deploy_utils.RealFilePartitioningTestCase.test_whole_disk
tags: worker-1
----------------------------------------------------------------------
Traceback (most recent call last):
_StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/mock.py", line 1201, in patched
    return func(*args, **keywargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 776, in test_whole_disk
    image_path='path')
  File "ironic/tests/drivers/test_deploy_utils.py", line 751, in _run_without_root
    return func(*args, **kwargs)
  File "ironic/drivers/modules/deploy_utils.py", line 312, in work_on_disk
    commit=commit)
  File "ironic/drivers/modules/deploy_utils.py", line 135, in make_partitions
    dp.commit()
  File "ironic/common/disk_partitioner.py", line 161, in commit
    timer.start(interval=interval).wait()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/event.py", line 121, in wait
    return hubs.get_hub().switch()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch
    return self.greenlet.switch()
  File "ironic/openstack/common/loopingcall.py", line 81, in _inner
    self.f(*self.args, **self.kw)
  File "ironic/common/disk_partitioner.py", line 122, in _wait_for_disk_to_become_available
    check_exit_code=[0, 1], run_as_root=True)
  File "ironic/tests/drivers/test_deploy_utils.py", line 748, in fake_execute
    return real_execute(*cmd, **kwargs)
  File "ironic/common/utils.py", line 82, in execute
    result = processutils.execute(*cmd, **kwargs)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/oslo_concurrency/processutils.py", line 218, in execute
    env=env_variables)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/green/subprocess.py", line 47, in __init__
    subprocess_orig.Popen.__init__(self, args, 0, *argss, **kwds)
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Traceback (most recent call last):
_StringException: Empty attachments:
  pythonlogging:''
  stderr
  stdout

Traceback (most recent call last):
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/mock.py", line 1201, in patched
    return func(*args, **keywargs)
  File "ironic/tests/drivers/test_deploy_utils.py", line 776, in test_whole_disk
    image_path='path')
  File "ironic/tests/drivers/test_deploy_utils.py", line 751, in _run_without_root
    return func(*args, **kwargs)
  File "ironic/drivers/modules/deploy_utils.py", line 312, in work_on_disk
    commit=commit)
  File "ironic/drivers/modules/deploy_utils.py", line 135, in make_partitions
    dp.commit()
  File "ironic/common/disk_partitioner.py", line 161, in commit
    timer.start(interval=interval).wait()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/event.py", line 121, in wait
    return hubs.get_hub().switch()
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch
    return self.greenlet.switch()
  File "ironic/openstack/common/loopingcall.py", line 81, in _inner
    self.f(*self.args, **self.kw)
  File "ironic/common/disk_partitioner.py", line 122, in _wait_for_disk_to_become_available
    check_exit_code=[0, 1], run_as_root=True)
  File "ironic/tests/drivers/test_deploy_utils.py", line 748, in fake_execute
    return real_execute(*cmd, **kwargs)
  File "ironic/common/utils.py", line 82, in execute
    result = processutils.execute(*cmd, **kwargs)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/oslo_concurrency/processutils.py", line 218, in execute
    env=env_variables)
  File "/home/fedora/ironic/.tox/py27/lib/python2.7/site-packages/eventlet/green/subprocess.py", line 47, in __init__
    subprocess_orig.Popen.__init__(self, args, 0, *argss, **kwds)
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
Ran 1542 tests in 13.299s (-0.539s)
FAILED (id=1, failures=2, skips=14)
error: testr failed (1)
ERROR: InvocationError: "/bin/bash -c TESTS_DIR=./ironic/tests/ python setup.py testr --slowest --testr-args=''"
pep8 develop-inst-noop: /home/fedora/ironic
pep8 runtests: PYTHONHASHSEED='3906926702'
pep8 runtests: commands[0] | flake8
pep8 runtests: commands[1] | bash -c find ironic -type f -regex '.*\.pot?' -print0|xargs -0 -n 1 msgfmt --check-format -o /dev/null
______________________________________________ summary ______________________________________________
ERROR:   py27: commands failed
  pep8: commands succeeded


A cursory look shows this function:  https://github.com/openstack/ironic/blob/master/ironic/tests/drivers/test_deploy_utils.py#L746 being the culprit, but IDK why yet.