When I useminikube dashborad command, I got

kiongf@youruncloud:~/k8s/project$ minikube dashboard
E0818 14:23:21.505243 3125 dashboard.go:45] Error accessing the kubernetes dashboard (is minikube running?): Error: Error getting kubernetes-dashboard service: services "kubernetes-dashboard" not found

I find the reason is the pod kube-addon-manager-minikubevm and kubernetes-dashboard-* which namespace are kube-system wait in ImangePullBackOff state.
These pods try to pull image from "gcr.io" and fail for GFW.

I login to minikubevm and pull these images from my private registry, and retag them.
docker@minikubeVM:~$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gcr.io/google_containers/kubernetes-dashboard-amd64 v1.1.0 d023c050c065 4 weeks ago 58.65 MB
gcr.io/google-containers/kube-addon-manager-amd64 v2 a876fb07f9c2 12 weeks ago 231.1 MB
gcr.io/google_containers/pause-amd64 3.0 99e59f495ffa 3 months ago 746.9 kB

Pod kube-addon-manager-minikubevm work well, however, pod kubernetes-dashboard-* always try to pull gcr.io/google_containers/kubernetes-dashboard-amd64:v1.1.0 :

2m 2m 1 {kubelet minikubevm} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "kubernetes-dashboard" with ErrImagePull: "image pull failed for gcr.io/google_containers/kubernetes-dashboard-amd64:v1.1.0, this may be because there are no credentials on this request. details: (An error occurred trying to connect: Post http://%2Fvar%2Frun%2Fdocker.sock/images/create?fromImage=gcr.io%2Fgoogle_containers%2Fkubernetes-dashboard-amd64&tag=v1.1.0: EOF)"