如何下载国外镜像

 1[root@xyy admin]#cat /etc/docker/daemon.json 
 2{
 3  "registry-mirrors":["https://kvuwuws2.mirror.aliyuncs.com","http://hub-mirror.c.163.com","https://dockerhub.azk8s.cn"]
 4}
 5[root@xyy admin]#
 6
 7
 8[root@xyy admin]#docker info
 9……
10 Registry: https://index.docker.io/v1/
11 ……

 1[root@xyy admin]###docker pull k8s-dns-node-cache:1.21.1
 2Error response from daemon: pull access denied for k8s-dns-node-cache, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
 3
 4[root@xyy admin]###docker pull busybox
 5Using default tag: latest
 6latest: Pulling from library/busybox
 73cb635b06aa2: Pull complete 
 8Digest: sha256:b5cfd4befc119a590ca1a81d6bb0fa1fb19f1fbebd0397f25fae164abe1e8a6a
 9Status: Downloaded newer image for busybox:latest
10docker.io/library/busybox:latest
11
12[root@xyy admin]###docker images
13REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
14busybox      latest    ffe9d497c324   3 weeks ago   1.24MB

1[root@xyy admin]###docker pull k8s.gcr.io/dns/k8s-dns-node-cache:1.21.1
2Error response from daemon: Get "https://k8s.gcr.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)