def migrate_volume(self, volume, host):
"""Leverage the Unity move session functionality.
This method is invoked at the source backend.
"""
log_params = {
'name': volume.name,
'src_host': volume.host,
'dest_host': host['host']
}
LOG.info(
'Migrate Volume: %(name)s, host: %(src_host)s, destination: '
'%(dest_host)s', log_params)
src_backend = utils.get_backend_name_from_volume(volume)
dest_backend = utils.get_backend_name_from_host(host)
if src_backend != dest_backend:
LOG.debug('Cross-backends migration not supported by Unity '
'driver. Falling back to host-assisted migration.')
return False, None
lun_id = self.get_lun_id(volume)
dest_pool_name = utils.get_pool_name_from_host(host)
dest_pool_id = self.get_pool_id_by_name(dest_pool_name)
if self.client.migrate_lun(lun_id, dest_pool_id):
LOG.debug('Volume migrated successfully.')
model_update = {}
return True, model_update
LOG.debug('Volume migrated failed. Falling back to '
'host-assisted migration.')
return False, None
def get_backend_name_from_host(self):
host = {'host': 'host@backend#pool_name'}
ret = utils.get_backend_name_from_volume(host)
self.assertEqual('host@backend', ret)
def get_backend_name_from_volume(self):
volume = test_adapter.MockOSResource(host='host@backend#pool_name')
ret = utils.get_backend_name_from_volume(volume)
self.assertEqual('host@backend', ret)
def get_backend_name_from_host(self):
host = {'host': 'host@backend#pool_name'}
ret = utils.get_backend_name_from_volume(host)
self.assertEqual('host@backend', ret)
def get_backend_name_from_volume(self):
volume = test_adapter.MockOSResource(host='host@backend#pool_name')
ret = utils.get_backend_name_from_volume(volume)
self.assertEqual('host@backend', ret)