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Merge "iscsi: Add _get_device_link retry when waiting for /dev/disk/by-id/ to populate" into stable/queens

changes/81/720181/1
Zuul 1 year ago
committed by Gerrit Code Review
parent
commit
e5d2237aff
  1. 1
      os_brick/initiator/connectors/iscsi.py
  2. 62
      os_brick/tests/initiator/connectors/test_iscsi.py

1
os_brick/initiator/connectors/iscsi.py

@ -514,6 +514,7 @@ class ISCSIConnector(base.BaseLinuxConnector, base_iscsi.BaseISCSIConnector):
with excutils.save_and_reraise_exception():
self._cleanup_connection(connection_properties, force=True)
@utils.retry(exceptions=(exception.VolumeDeviceNotFound))
def _get_device_link(self, wwn, device, mpath):
# These are the default symlinks that should always be there
if mpath:

62
os_brick/tests/initiator/connectors/test_iscsi.py

@ -1490,17 +1490,67 @@ Setting up iSCSI targets: unused
mock.call('/dev/disk/by-id/dm-...'),
mock.call('/dev/disk/by-id/scsi-wwn')])
@mock.patch('time.sleep')
@mock.patch('os.path.realpath', return_value='/dev/sdz')
@mock.patch('os.listdir', return_value=['dm-...', 'scsi-...'])
def test__get_device_link_not_found(self, listdir_mock, realpath_mock):
def test__get_device_link_not_found(self, listdir_mock, realpath_mock,
mock_time):
self.assertRaises(exception.VolumeDeviceNotFound,
self.connector._get_device_link,
'wwn', '/dev/sda', None)
listdir_mock.assert_called_once_with('/dev/disk/by-id/')
realpath_mock.assert_has_calls([
mock.call('/dev/disk/by-id/scsi-wwn'),
mock.call('/dev/disk/by-id/dm-...'),
mock.call('/dev/disk/by-id/scsi-...')])
listdir_mock.assert_has_calls(3 * [mock.call('/dev/disk/by-id/')])
self.assertEqual(3, listdir_mock.call_count)
realpath_mock.assert_has_calls(
3 * [mock.call('/dev/disk/by-id/scsi-wwn'),
mock.call('/dev/disk/by-id/dm-...'),
mock.call('/dev/disk/by-id/scsi-...')])
self.assertEqual(9, realpath_mock.call_count)
@mock.patch('time.sleep')
@mock.patch('os.path.realpath')
@mock.patch('os.listdir', return_value=['dm-...', 'scsi-...'])
def test__get_device_link_symlink_found_after_retry(self, mock_listdir,
mock_realpath,
mock_time):
# Return the expected realpath on the third retry
mock_realpath.side_effect = [
None, None, None, None, None, None, '/dev/sda']
# Assert that VolumeDeviceNotFound isn't raised
self.connector._get_device_link('wwn', '/dev/sda', None)
# Assert that listdir and realpath have been called correctly
mock_listdir.assert_has_calls(2 * [mock.call('/dev/disk/by-id/')])
self.assertEqual(2, mock_listdir.call_count)
mock_realpath.assert_has_calls(
2 * [mock.call('/dev/disk/by-id/scsi-wwn'),
mock.call('/dev/disk/by-id/dm-...'),
mock.call('/dev/disk/by-id/scsi-...')]
+ [mock.call('/dev/disk/by-id/scsi-wwn')])
self.assertEqual(7, mock_realpath.call_count)
@mock.patch('time.sleep')
@mock.patch('os.path.realpath')
@mock.patch('os.listdir', return_value=['dm-...', 'scsi-...'])
def test__get_device_link_symlink_found_after_retry_by_listdir(
self, mock_listdir, mock_realpath, mock_time):
# Return the expected realpath on the second retry while looping over
# the devices returned by listdir
mock_realpath.side_effect = [
None, None, None, None, None, '/dev/sda']
# Assert that VolumeDeviceNotFound isn't raised
self.connector._get_device_link('wwn', '/dev/sda', None)
# Assert that listdir and realpath have been called correctly
mock_listdir.assert_has_calls(2 * [mock.call('/dev/disk/by-id/')])
self.assertEqual(2, mock_listdir.call_count)
mock_realpath.assert_has_calls(
2 * [mock.call('/dev/disk/by-id/scsi-wwn'),
mock.call('/dev/disk/by-id/dm-...'),
mock.call('/dev/disk/by-id/scsi-...')])
self.assertEqual(6, mock_realpath.call_count)
@mock.patch.object(iscsi.ISCSIConnector, '_run_iscsiadm_bare')
def test_get_node_startup_values(self, run_iscsiadm_bare_mock):

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