def attach_volume(self, blockdevice_id, attach_to):
""" Attach ``blockdevice_id`` to ``host``.
:param unicode blockdevice_id: The unique identifier for the block
device being attached.
:param unicode attach_to: An identifier like the one returned by the
``compute_instance_id`` method indicating the node to which to
attach the volume.
:raises UnknownVolume: If the supplied ``blockdevice_id`` does not
exist.
:raises AlreadyAttachedVolume: If the supplied ``blockdevice_id`` is
already attached.
:returns: A ``BlockDeviceVolume`` with a ``host`` attribute set to
``host``.
"""
vol = self._get_solidfire_volume(blockdevice_id)
if not vol:
raise UnknownVolume(blockdevice_id)
tgt_iqn = vol['iqn']
if utils.path_exists('/dev/disk/by-path/ip-%s-iscsi-%s-lun-0' %
(self.svip, tgt_iqn), 1):
raise AlreadyAttachedVolume(blockdevice_id)
# It's not attached here, make sure it's not attached somewhere else
# In the future we can add multi-attach support maybe, but for now
# avoid the trouble of file-systems etc
current_sessions = self._current_iscsi_sessions(blockdevice_id)
if current_sessions:
raise AlreadyAttachedVolume(blockdevice_id)
targets = utils.iscsi_discovery(self.svip)
if len(targets) < 1 and tgt_iqn not in targets:
raise Exception("No targes found during discovery.")
if utils.iscsi_login(self.svip, tgt_iqn):
return BlockDeviceVolume(
blockdevice_id=unicode(blockdevice_id),
size=vol['totalSize'],
attached_to=attach_to,
dataset_id=uuid.UUID(str(vol['name'])))
raise Exception("Failed iSCSI login to device: %s" % blockdevice_id)
def detach_volume(self, blockdevice_id):
""" Detach ``blockdevice_id`` from whatever host it is attached to.
:param unicode blockdevice_id: The unique identifier for the block
device being detached.
:raises UnknownVolume: If the supplied ``blockdevice_id`` does not
exist.
:raises UnattachedVolume: If the supplied ``blockdevice_id`` is
not attached to anything.
:returns: ``None``
"""
vol = self._get_solidfire_volume(blockdevice_id)
if not vol:
raise UnknownVolume(blockdevice_id)
tgt_iqn = vol['iqn']
if not utils.path_exists('/dev/disk/by-path/ip-%s-iscsi-%s-lun-0' %
(self.svip, tgt_iqn), 1):
raise UnattachedVolume(blockdevice_id)
utils.iscsi_logout(self.svip, tgt_iqn)
def list_volumes(self):
""" List all the block devices available via the back end API.
:returns: A ``list`` of ``BlockDeviceVolume``s.
"""
volumes = []
sfvols = self.client.issue_request('ListVolumesForAccount',
{'accountID': self.account_id},
version='7.0')['volumes']
for v in sfvols:
attached_to = None
tgt_iqn = v['iqn']
if utils.path_exists('/dev/disk/by-path/ip-%s-iscsi-%s-lun-0' %
(self.svip, tgt_iqn), 1):
attached_to = self.compute_instance_id()
name = v['name']
if 'flock-' in v['name']:
name = name.replace('flock-', '')
volumes.append(BlockDeviceVolume(
blockdevice_id=unicode(v['volumeID']),
size=v['totalSize'],
attached_to=attached_to,
dataset_id=uuid.UUID(str(name))))
return volumes
