Volume discovery and local storage management lib
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import mock
from oslo_concurrency import processutils as putils
from os_brick import exception
from os_brick.initiator.connectors import nvme
from os_brick.initiator import linuxscsi
from os_brick.tests.initiator import test_connector
FAKE_NVME_LIST_OUTPUT = """
Node SN Model \
Namespace Usage Format FW Rev\n
---------------- -------------------- ---------------------------------------\
- --------- -------------------------- ---------------- --------\n
/dev/nvme0n1 67ff9467da6e5567 Linux \
10 1.07 GB / 1.07 GB 512 B + 0 B 4.8.0-58\n
"""
class NVMeConnectorTestCase(test_connector.ConnectorTestCase):
"""Test cases for NVMe initiator class."""
def setUp(self):
super(NVMeConnectorTestCase, self).setUp()
self.connector = nvme.NVMeConnector(None,
execute=self.fake_execute,
use_multipath=False)
def _nvme_list_cmd(self, *args, **kwargs):
return FAKE_NVME_LIST_OUTPUT, None
def test__get_nvme_devices(self):
expected = ['/dev/nvme0n1']
self.connector._execute = self._nvme_list_cmd
actual = self.connector._get_nvme_devices()
self.assertEqual(expected, actual)
@mock.patch.object(nvme.NVMeConnector, '_execute')
def test_get_nvme_devices_raise(self, mock_execute):
mock_execute.side_effect = putils.ProcessExecutionError
self.assertRaises(putils.ProcessExecutionError,
self.connector._get_nvme_devices)
@mock.patch.object(nvme.NVMeConnector, '_get_nvme_devices')
@mock.patch.object(nvme.NVMeConnector, '_execute')
@mock.patch('time.sleep')
def test_connect_volume(self, mock_sleep, mock_execute, mock_devices):
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
mock_devices.side_effect = [
['/dev/nvme0n1'], ['/dev/nvme0n2']]
device_info = self.connector.connect_volume(
connection_properties)
self.assertEqual('/dev/nvme0n2', device_info['path'])
self.assertEqual('block', device_info['type'])
self.assertEqual(2, mock_devices.call_count)
mock_execute.assert_called_once_with(
'nvme', 'connect', '-t',
connection_properties['transport_type'], '-n',
'volume_123',
'-a', connection_properties['target_portal'],
'-s', connection_properties['target_port'],
root_helper=None,
run_as_root=True)
@mock.patch.object(nvme.NVMeConnector, '_execute')
def test_connect_volume_raise(self, mock_execute):
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
mock_execute.side_effect = putils.ProcessExecutionError
self.assertRaises(putils.ProcessExecutionError,
self.connector.connect_volume,
connection_properties)
@mock.patch.object(nvme.NVMeConnector, '_get_nvme_devices')
@mock.patch.object(nvme.NVMeConnector, '_execute')
@mock.patch('time.sleep')
def test_connect_volume_max_retry(
self, mock_sleep, mock_execute, mock_devices):
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
mock_devices.return_value = '/dev/nvme0n1'
self.assertRaises(exception.TargetPortalNotFound,
self.connector.connect_volume,
connection_properties)
@mock.patch.object(nvme.NVMeConnector, '_execute')
def test_disconnect_volume(self, mock_execute):
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
self.connector.disconnect_volume(connection_properties, None)
mock_execute.asert_called_once_with(
'nvme', 'disconnect', '-n',
'volume_123',
root_helper=None,
run_as_root=True)
@mock.patch.object(nvme.NVMeConnector, '_execute')
def test_disconnect_volume_raise(self, mock_execute):
mock_execute.side_effect = putils.ProcessExecutionError
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
self.assertRaises(putils.ProcessExecutionError,
self.connector.disconnect_volume,
connection_properties,
None)
@mock.patch.object(nvme.NVMeConnector, 'get_volume_paths')
def test_extend_volume_no_path(self, mock_volume_paths):
mock_volume_paths.return_value = []
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
self.assertRaises(exception.VolumePathsNotFound,
self.connector.extend_volume,
connection_properties)
@mock.patch.object(linuxscsi.LinuxSCSI, 'find_multipath_device_path')
@mock.patch.object(linuxscsi.LinuxSCSI, 'extend_volume')
@mock.patch.object(nvme.NVMeConnector, 'get_volume_paths')
def test_extend_volume(self, mock_volume_paths, mock_scsi_extend,
mock_scsi_find_mpath):
fake_new_size = 1024
mock_volume_paths.return_value = ['/dev/vdx']
mock_scsi_extend.return_value = fake_new_size
connection_properties = {'target_portal': 'portal',
'target_port': 1,
'nqn': 'nqn.volume_123',
'device_path': '',
'transport_type': 'rdma'}
new_size = self.connector.extend_volume(connection_properties)
self.assertEqual(fake_new_size, new_size)
mock_scsi_find_mpath.assert_not_called()