我们试图让这个例子在一堆虚拟服务器上的 kubernetes 设置上工作，作为概念的证明。但是，我们遇到了kubectl port-forward命令问题。
我们得到的错误是error: error upgrading connection: unable to upgrade connection: pod does not exist，并且在-v=10对 /portforward 的 API 调用上显示 404。命令的整个输出：
oschusler@shepherd:~$ kubectl port-forward pod/redis-master-6b464554c8-vwns2 6379:6379 -v=10
I0815 11:28:18.281223 17549 loader.go:359] Config loaded from file /home/oschusler/.kube/config
I0815 11:28:18.282045 17549 loader.go:359] Config loaded from file /home/oschusler/.kube/config
I0815 11:28:18.284388 17549 loader.go:359] Config loaded from file /home/oschusler/.kube/config
I0815 11:28:18.285945 17549 cached_discovery.go:104] returning cached discovery info from /home/oschusler/.kube/cache/discovery/192.168.99.100_6443/servergroups.json
I0815 11:28:18.286747 17549 cached_discovery.go:70] returning cached discovery info …kubernetes ×1