해결하고자 하는 것 kubernetes를 사용하는 도중에 다음과 같은 오류가 나타났다. Events: Type Reason Age From Message ---- ------ ---- ---- ------- Normal Scheduled 70s default-scheduler Successfully assigned udacity/nginx-basic-5fbb84747d-4zv64 to node2 Warning FailedCreatePodSandBox 70s kubelet Failed to create pod sandbox: rpc error: code = Unknown desc = failed to setup network for sandbox "9cc2d017dc9f1bdd51e0fa08beb963b8..