def rebuild_multipath(self, parent_connections):
"""
:param parent_connections: list
"""
LOG.debug("Virtman: begin to rebuild multipath...")
# If it has image on the local node or no path to connect, connect to
# root
if self.is_local_has_image or len(parent_connections) == 0:
parent_connections = self.image_connections
LOG.debug("Virtman: the parents were modified! now parents = %s" %
parent_connections)
# Get keys of paths to remove, and add new paths
paths_to_remove = []
for key in self.paths.keys():
found = False
for connection in parent_connections:
if key == Path.connection_to_str(connection):
found = True
break
if not found:
paths_to_remove.append(key)
for connection in parent_connections:
if not isinstance(connection, dict):
raise (Exception("Unknown %s type of %s " %
(type(connection), connection)))
key = Path.connection_to_str(connection)
if key not in self.paths:
self.paths[key] = Path(connection)
# Connect new paths
for key in self.paths.keys():
if key not in paths_to_remove and not self.paths[key].connected:
self.paths[key].connect()
# Rebuild multipath device
disks = [self.paths[key].device_path for key in self.paths.keys()
if key not in paths_to_remove and self.paths[key].connected]
if len(disks) > 0:
if not self.has_multipath:
self._create_multipath(disks)
else:
self._reload_multipath(disks)
# TODO:fix here, wait for multipath device ready
time.sleep(2)
# Disconnect paths to remove
for key in paths_to_remove:
if self.paths[key].connected:
self.paths[key].disconnect()
del self.paths[key]
LOG.debug("Virtman: rebuild multipath completed, multipath = %s" %
self.multipath_path)
def __str__(self):
return Path.connection_to_str(self.connection)
