Brick connector revised fix for NFS drivers
This change fixes the error that comes while getting brick connector and attaching volumes in case of NFS drivers in cinder. The attribute for mount point base was not passed to attach_volume method as the connector initialization logic is common for all types of protocols. It is fixed by populating the required parameter in the RemoteFsConnector by extracting it from connection properties. The infrastructure for fixing this situation for remote fs drivers is implemented in this fix. The drivers need to override the method _get_mount_point_base in their implementation. NFS driver implements it. GlusterFs implementation of the method to follow in a separate patch. Hence marking it partial fix. Change-Id: Id61a437fca1870529fa8b85f7fc2f73eae665294 Partial-Bug: #1238085
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@ -797,6 +797,21 @@ class RemoteFsConnector(InitiatorConnector):
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execute=putils.execute,
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device_scan_attempts=DEVICE_SCAN_ATTEMPTS_DEFAULT,
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*args, **kwargs):
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kwargs = kwargs or {}
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conn = kwargs.get('conn')
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if conn:
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mount_point_base = conn.get('mount_point_base')
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if mount_type.lower() == 'nfs':
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kwargs['nfs_mount_point_base'] =\
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kwargs.get('nfs_mount_point_base') or\
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mount_point_base
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elif mount_type.lower() == 'glusterfs':
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kwargs['glusterfs_mount_point_base'] =\
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kwargs.get('glusterfs_mount_point_base') or\
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mount_point_base
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else:
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LOG.warn(_("Connection details not present."
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" RemoteFsClient may not initialize properly."))
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self._remotefsclient = remotefs.RemoteFsClient(mount_type, root_helper,
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execute=execute,
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*args, **kwargs)
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@ -822,7 +837,7 @@ class RemoteFsConnector(InitiatorConnector):
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"""
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mnt_flags = []
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if 'options' in connection_properties:
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if connection_properties.get('options'):
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mnt_flags = connection_properties['options'].split()
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nfs_share = connection_properties['export']
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@ -787,7 +787,8 @@ class CoraidDriverImageTestCases(CoraidDriverTestCase):
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utils.brick_get_connector('aoe',
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device_scan_attempts=3,
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use_multipath=False).\
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use_multipath=False,
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conn=mox.IgnoreArg()).\
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AndReturn(aoe_initiator)
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aoe_initiator\
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@ -795,7 +795,8 @@ def brick_get_connector_properties():
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def brick_get_connector(protocol, driver=None,
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execute=processutils.execute,
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use_multipath=False,
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device_scan_attempts=3):
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device_scan_attempts=3,
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*args, **kwargs):
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"""Wrapper to get a brick connector object.
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This automatically populates the required protocol as well
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as the root_helper needed to execute commands.
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@ -807,7 +808,8 @@ def brick_get_connector(protocol, driver=None,
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execute=execute,
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use_multipath=use_multipath,
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device_scan_attempts=
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device_scan_attempts)
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device_scan_attempts,
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*args, **kwargs)
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def require_driver_initialized(func):
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@ -373,7 +373,8 @@ class VolumeDriver(object):
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connector = utils.brick_get_connector(protocol,
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use_multipath=use_multipath,
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device_scan_attempts=
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device_scan_attempts)
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device_scan_attempts,
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conn=conn)
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device = connector.connect_volume(conn['data'])
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host_device = device['path']
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@ -92,9 +92,25 @@ class RemoteFsDriver(driver.VolumeDriver):
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data['options'] = self.shares[volume['provider_location']]
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return {
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'driver_volume_type': self.driver_volume_type,
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'data': data
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'data': data,
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'mount_point_base': self._get_mount_point_base()
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}
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def _get_mount_point_base(self):
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"""Returns the mount point base for the remote fs.
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This method facilitates returning mount point base
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for the specific remote fs. Override this method
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in the respective driver to return the entry to be
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used while attach/detach using brick in cinder.
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If not overridden then it returns None without
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raising exception to continue working for cases
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when not used with brick.
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"""
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LOG.debug(_("Driver specific implementation needs to return"
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" mount_point_base."))
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return None
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def create_volume(self, volume):
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"""Creates a volume.
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@ -373,15 +389,16 @@ class NfsDriver(RemoteFsDriver):
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super(NfsDriver, self).__init__(*args, **kwargs)
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self.configuration.append_config_values(volume_opts)
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root_helper = utils.get_root_helper()
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base = getattr(self.configuration,
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'nfs_mount_point_base',
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CONF.nfs_mount_point_base)
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# base bound to instance is used in RemoteFsConnector.
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self.base = getattr(self.configuration,
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'nfs_mount_point_base',
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CONF.nfs_mount_point_base)
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opts = getattr(self.configuration,
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'nfs_mount_options',
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CONF.nfs_mount_options)
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self._remotefsclient = remotefs.RemoteFsClient(
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'nfs', root_helper, execute=execute,
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nfs_mount_point_base=base,
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nfs_mount_point_base=self.base,
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nfs_mount_options=opts)
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def set_execute(self, execute):
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@ -533,3 +550,6 @@ class NfsDriver(RemoteFsDriver):
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'*snapshot*', mount_point, run_as_root=True)
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total_allocated = float(du.split()[0])
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return total_size, total_available, total_allocated
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def _get_mount_point_base(self):
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return self.base
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