def get_dataset(self):
'''Returns a Filesystem for test purposes. If the ZFS dataset already
exists, the test is aborted, to prevent accidental destruction of data.
If a dataset is given, it is stored and destroyed (as well as any
descendants) after test execution'''
if not _PERMISSIONS:
raise SkipTest("Insufficient permissions to run ZFS test")
test_ids = (self.id()).split(".")
# Use name of the test case as the name of the function.
# name of test case is found in the last field of the test id.
ds_name = _ZFS_TEST_DS % test_ids[-1] + "_%s"
tried = []
# try to look for a unique name for the ZFS dataset to be used
# for the tests. If can not find a unique name within 15 tries,
# notify the user, so, they can do some cleanup of their test datasets.
for x in xrange(15):
dataset = Filesystem(ds_name % x)
tried.append(dataset.name)
if not dataset.exists:
break
else:
raise SkipTest("Could not generate unique ZFS dataset to safely"
" test. Tried: %s" % tried)
dataset.create(dry_run=False)
self.__dataset = dataset
return dataset
def get_dataset(self):
'''Returns a Filesystem for test purposes. If the ZFS dataset already
exists, the test is aborted, to prevent accidental destruction of data.
If a dataset is given, it is stored and destroyed (as well as any
descendants) after test execution'''
if not _PERMISSIONS:
raise SkipTest("Insufficient permissions to run ZFS test")
test_ids = (self.id()).split(".")
# Use name of the test case as the name of the function.
# name of test case is found in the last field of the test id.
ds_name = _ZFS_TEST_DS % test_ids[-1] + "_%s"
tried = []
# try to look for a unique name for the ZFS dataset to be used
# for the tests. If can not find a unique name within 15 tries,
# notify the user, so, they can do some cleanup of their test datasets.
for x in xrange(15):
dataset = Filesystem(ds_name % x)
tried.append(dataset.name)
if not dataset.exists:
break
else:
raise SkipTest("Could not generate unique ZFS dataset to safely"
" test. Tried: %s" % tried)
dataset.create(dry_run=False)
self.__dataset = dataset
return dataset
def setup_build_dataset(zpool, fs, resume_checkpoint=None):
""" Setup the build datasets for use by DC. This includes setting up:
- top level build dataset
- a child dataset named 'build_data'
- a child dataset named 'media'
- a child dataset named 'logs'
- a snapshot of the empty build_data dataset - build_data@empty
"""
eng = InstallEngine.get_instance()
doc = eng.data_object_cache
build_data = eng.dataset
empty_snap = Filesystem(
os.path.join(zpool.name, fs.name, "build_data@empty"))
logs = Filesystem(os.path.join(zpool.name, fs.name, "logs"))
media = Filesystem(os.path.join(zpool.name, fs.name, "media"))
if fs.action == "create":
# recursively destroy the Filesystem dataset before creating it
fs.destroy(dry_run=False, recursive=True)
fs.create()
build_data.create()
logs.create()
media.create()
if fs.action == "preserve":
# check to see if base_dataset/build_data@empty exists.
if resume_checkpoint is None and empty_snap.exists:
# rollback the dataset only if DC is not resuming from a specific
# checkpoint
build_data.rollback("empty", recursive=True)
if not empty_snap.exists:
build_data.snapshot("empty")
# Now that the base dataset is created, store the mountpoint ZFS calculated
base_dataset_mp = fs.get("mountpoint")
# check for the existence of a lock file, bail out if one exists.
if os.path.exists(base_dataset_mp):
if os.path.exists(os.path.join(base_dataset_mp, DC_LOCKFILE)):
raise RuntimeError("distro_const: An instance of distro_const "
"is already running in %s" % base_dataset_mp)
DC_LOGGER.info("Build datasets successfully setup")
return (base_dataset_mp, build_data.get("mountpoint"),
logs.get("mountpoint"), media.get("mountpoint"))