解決思路：
1.在Google Cloud中獲取K8s鏡像，同步至Hub倉庫（該步驟我已經完成，你們只需要從我Hub倉庫獲取即可）;
2.獲取Hub倉庫中的K8s鏡像；
3.使用命令docker tag修改鏡像標籤；
PS：目前只支持v1.15.0版本，後續版本我將整理放入Hub倉庫，敬請關注；
Hub倉庫網址
kube-apiserver:v1.15.0
https://hub.docker.com/r/kry1702/kube-apiserver
kube-controller-manager:v1.15.0
https://hub.docker.com/r/kry1702/kube-controller-manager
kube-scheduler:v1.15.0
https://hub.docker.com/r/kry1702/kube-scheduler
kube-proxy:v1.15.0
https://hub.docker.com/r/kry1702/kube-proxy
pause:3.1
https://hub.docker.com/r/kry1702/pause
etcd:3.3.10
https://hub.docker.com/r/kry1702/etcd
coredns:1.3.1
https://hub.docker.com/r/kry1702/coredns拉取方式
docker pull kry1702/kube-apiserver:v1.15.0
docker pull kry1702/kube-controller-manager:v1.15.0
docker pull kry1702/kube-scheduler:v1.15.0
docker pull kry1702/kube-proxy:v1.15.0
docker pull kry1702/pause:3.1
docker pull kry1702/etcd:3.3.10
docker pull kry1702/coredns:1.3.1還原操作
docker tag kry1702/kube-apiserver:v1.15.0 k8s.gcr.io/kube-apiserver:v1.15.0
docker tag kry1702/kube-controller-manager:v1.15.0 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag kry1702/kube-scheduler:v1.15.0 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag kry1702/kube-proxy:v1.15.0 k8s.gcr.io/kube-proxy:v1.15.0
docker tag kry1702/pause:3.1 k8s.gcr.io/pause:3.1
docker tag kry1702/etcd:3.3.10 k8s.gcr.io/etcd:3.3.10
docker tag kry1702/coredns:1.3.1 k8s.gcr.io/coredns:1.3.1