def StartInstance(self, feedback_fn, src_node_uuid):
    assert self.instance.disks_active
    feedback_fn("Starting instance %s" % self.instance.name)
    result = self.rpc.call_instance_start(src_node_uuid,
                                          (self.instance, None, None),
                                          False, self.op.reason)
    msg = result.fail_msg
    if msg:
      feedback_fn("Failed to start instance: %s" % msg)
      ShutdownInstanceDisks(self, self.instance)
      raise errors.OpExecError("Could not start instance: %s" % msg)
Send the node instructions to start the instance.
dataset/ETHPy150Open ganeti/ganeti/lib/cmdlib/backup.py/LUBackupExport.StartInstance