containerd的配置文件目录：/etc/containerd/config.toml
vim /etc/containerd/config.toml
在plugins项 [plugins]添加
[plugins."io.containerd.grpc.v1.cri".registry]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint = ["https://registry.cn-hangzhou.aliyuncs.com"]
重启containerd
systemctl restart containerd