ubuntu@VM-0-6-ubuntu:~$ sudo k0s ctr image
NAME:
ctr images - manage images
USAGE:
ctr images command [command options] [arguments...]
COMMANDS:
check       check that an image has all content available locally
export      export images
import      import images
list, ls    list images known to containerd
mount       mount an image to a target path
unmount     unmount the image from the target
pull        pull an image from a remote
push        push an image to a remote
remove, rm  remove one or more images by reference
tag         tag an image
label       set and clear labels for an image
OPTIONS:
--help, -h  show help

In some country, it is disgusting that gcr is blocked.

If you are using k0s, the infra pod pull will fail.

The easiest solution is pull the image from other registry and retag it with the gcr name (cheating the k0s) 

#!/bin/sh
for name in kube-controller-manager:v1.18.3 kube-scheduler:v1.18.3 kube-proxy:v1.18.3 pause:3.2 etcd:3.4.3-0 coredns:1.6.7 kube-apiserver:v1.18.3
do
sudo k0s ctr image pull registry.cn-hangzhou.aliyuncs.com/google_containers/$name
sudo k0s ctr image tag registry.cn-hangzhou.aliyuncs.com/google_containers/$name k8s.gcr.io/$name
sudo k0s ctr image rmi registry.cn-hangzhou.aliyuncs.com/google_containers/$name
done